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-rw-r--r--Makefile1
-rw-r--r--apply.c4988
-rw-r--r--apply.h137
-rw-r--r--builtin/am.c65
-rw-r--r--builtin/apply.c4861
-rw-r--r--git-compat-util.h3
-rwxr-xr-xt/t4012-diff-binary.sh4
-rwxr-xr-xt/t4254-am-corrupt.sh2
-rw-r--r--usage.c15
9 files changed, 5199 insertions, 4877 deletions
diff --git a/Makefile b/Makefile
index 7f184923dd..df4f86bb30 100644
--- a/Makefile
+++ b/Makefile
@@ -696,6 +696,7 @@ LIB_OBJS += abspath.o
LIB_OBJS += advice.o
LIB_OBJS += alias.o
LIB_OBJS += alloc.o
+LIB_OBJS += apply.o
LIB_OBJS += archive.o
LIB_OBJS += archive-tar.o
LIB_OBJS += archive-zip.o
diff --git a/apply.c b/apply.c
new file mode 100644
index 0000000000..289cbd0b8c
--- /dev/null
+++ b/apply.c
@@ -0,0 +1,4988 @@
+/*
+ * apply.c
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ *
+ * This applies patches on top of some (arbitrary) version of the SCM.
+ *
+ */
+
+#include "cache.h"
+#include "blob.h"
+#include "delta.h"
+#include "diff.h"
+#include "dir.h"
+#include "xdiff-interface.h"
+#include "ll-merge.h"
+#include "lockfile.h"
+#include "parse-options.h"
+#include "quote.h"
+#include "rerere.h"
+#include "apply.h"
+
+static void git_apply_config(void)
+{
+ git_config_get_string_const("apply.whitespace", &apply_default_whitespace);
+ git_config_get_string_const("apply.ignorewhitespace", &apply_default_ignorewhitespace);
+ git_config(git_default_config, NULL);
+}
+
+static int parse_whitespace_option(struct apply_state *state, const char *option)
+{
+ if (!option) {
+ state->ws_error_action = warn_on_ws_error;
+ return 0;
+ }
+ if (!strcmp(option, "warn")) {
+ state->ws_error_action = warn_on_ws_error;
+ return 0;
+ }
+ if (!strcmp(option, "nowarn")) {
+ state->ws_error_action = nowarn_ws_error;
+ return 0;
+ }
+ if (!strcmp(option, "error")) {
+ state->ws_error_action = die_on_ws_error;
+ return 0;
+ }
+ if (!strcmp(option, "error-all")) {
+ state->ws_error_action = die_on_ws_error;
+ state->squelch_whitespace_errors = 0;
+ return 0;
+ }
+ if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
+ state->ws_error_action = correct_ws_error;
+ return 0;
+ }
+ return error(_("unrecognized whitespace option '%s'"), option);
+}
+
+static int parse_ignorewhitespace_option(struct apply_state *state,
+ const char *option)
+{
+ if (!option || !strcmp(option, "no") ||
+ !strcmp(option, "false") || !strcmp(option, "never") ||
+ !strcmp(option, "none")) {
+ state->ws_ignore_action = ignore_ws_none;
+ return 0;
+ }
+ if (!strcmp(option, "change")) {
+ state->ws_ignore_action = ignore_ws_change;
+ return 0;
+ }
+ return error(_("unrecognized whitespace ignore option '%s'"), option);
+}
+
+int init_apply_state(struct apply_state *state,
+ const char *prefix,
+ struct lock_file *lock_file)
+{
+ memset(state, 0, sizeof(*state));
+ state->prefix = prefix;
+ state->prefix_length = state->prefix ? strlen(state->prefix) : 0;
+ state->lock_file = lock_file;
+ state->newfd = -1;
+ state->apply = 1;
+ state->line_termination = '\n';
+ state->p_value = 1;
+ state->p_context = UINT_MAX;
+ state->squelch_whitespace_errors = 5;
+ state->ws_error_action = warn_on_ws_error;
+ state->ws_ignore_action = ignore_ws_none;
+ state->linenr = 1;
+ string_list_init(&state->fn_table, 0);
+ string_list_init(&state->limit_by_name, 0);
+ string_list_init(&state->symlink_changes, 0);
+ strbuf_init(&state->root, 0);
+
+ git_apply_config();
+ if (apply_default_whitespace && parse_whitespace_option(state, apply_default_whitespace))
+ return -1;
+ if (apply_default_ignorewhitespace && parse_ignorewhitespace_option(state, apply_default_ignorewhitespace))
+ return -1;
+ return 0;
+}
+
+void clear_apply_state(struct apply_state *state)
+{
+ string_list_clear(&state->limit_by_name, 0);
+ string_list_clear(&state->symlink_changes, 0);
+ strbuf_release(&state->root);
+
+ /* &state->fn_table is cleared at the end of apply_patch() */
+}
+
+static void mute_routine(const char *msg, va_list params)
+{
+ /* do nothing */
+}
+
+int check_apply_state(struct apply_state *state, int force_apply)
+{
+ int is_not_gitdir = !startup_info->have_repository;
+
+ if (state->apply_with_reject && state->threeway)
+ return error("--reject and --3way cannot be used together.");
+ if (state->cached && state->threeway)
+ return error("--cached and --3way cannot be used together.");
+ if (state->threeway) {
+ if (is_not_gitdir)
+ return error(_("--3way outside a repository"));
+ state->check_index = 1;
+ }
+ if (state->apply_with_reject) {
+ state->apply = 1;
+ if (state->apply_verbosity == verbosity_normal)
+ state->apply_verbosity = verbosity_verbose;
+ }
+ if (!force_apply && (state->diffstat || state->numstat || state->summary || state->check || state->fake_ancestor))
+ state->apply = 0;
+ if (state->check_index && is_not_gitdir)
+ return error(_("--index outside a repository"));
+ if (state->cached) {
+ if (is_not_gitdir)
+ return error(_("--cached outside a repository"));
+ state->check_index = 1;
+ }
+ if (state->check_index)
+ state->unsafe_paths = 0;
+ if (!state->lock_file)
+ return error("BUG: state->lock_file should not be NULL");
+
+ if (state->apply_verbosity <= verbosity_silent) {
+ state->saved_error_routine = get_error_routine();
+ state->saved_warn_routine = get_warn_routine();
+ set_error_routine(mute_routine);
+ set_warn_routine(mute_routine);
+ }
+
+ return 0;
+}
+
+static void set_default_whitespace_mode(struct apply_state *state)
+{
+ if (!state->whitespace_option && !apply_default_whitespace)
+ state->ws_error_action = (state->apply ? warn_on_ws_error : nowarn_ws_error);
+}
+
+/*
+ * This represents one "hunk" from a patch, starting with
+ * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
+ * patch text is pointed at by patch, and its byte length
+ * is stored in size. leading and trailing are the number
+ * of context lines.
+ */
+struct fragment {
+ unsigned long leading, trailing;
+ unsigned long oldpos, oldlines;
+ unsigned long newpos, newlines;
+ /*
+ * 'patch' is usually borrowed from buf in apply_patch(),
+ * but some codepaths store an allocated buffer.
+ */
+ const char *patch;
+ unsigned free_patch:1,
+ rejected:1;
+ int size;
+ int linenr;
+ struct fragment *next;
+};
+
+/*
+ * When dealing with a binary patch, we reuse "leading" field
+ * to store the type of the binary hunk, either deflated "delta"
+ * or deflated "literal".
+ */
+#define binary_patch_method leading
+#define BINARY_DELTA_DEFLATED 1
+#define BINARY_LITERAL_DEFLATED 2
+
+/*
+ * This represents a "patch" to a file, both metainfo changes
+ * such as creation/deletion, filemode and content changes represented
+ * as a series of fragments.
+ */
+struct patch {
+ char *new_name, *old_name, *def_name;
+ unsigned int old_mode, new_mode;
+ int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
+ int rejected;
+ unsigned ws_rule;
+ int lines_added, lines_deleted;
+ int score;
+ unsigned int is_toplevel_relative:1;
+ unsigned int inaccurate_eof:1;
+ unsigned int is_binary:1;
+ unsigned int is_copy:1;
+ unsigned int is_rename:1;
+ unsigned int recount:1;
+ unsigned int conflicted_threeway:1;
+ unsigned int direct_to_threeway:1;
+ struct fragment *fragments;
+ char *result;
+ size_t resultsize;
+ char old_sha1_prefix[41];
+ char new_sha1_prefix[41];
+ struct patch *next;
+
+ /* three-way fallback result */
+ struct object_id threeway_stage[3];
+};
+
+static void free_fragment_list(struct fragment *list)
+{
+ while (list) {
+ struct fragment *next = list->next;
+ if (list->free_patch)
+ free((char *)list->patch);
+ free(list);
+ list = next;
+ }
+}
+
+static void free_patch(struct patch *patch)
+{
+ free_fragment_list(patch->fragments);
+ free(patch->def_name);
+ free(patch->old_name);
+ free(patch->new_name);
+ free(patch->result);
+ free(patch);
+}
+
+static void free_patch_list(struct patch *list)
+{
+ while (list) {
+ struct patch *next = list->next;
+ free_patch(list);
+ list = next;
+ }
+}
+
+/*
+ * A line in a file, len-bytes long (includes the terminating LF,
+ * except for an incomplete line at the end if the file ends with
+ * one), and its contents hashes to 'hash'.
+ */
+struct line {
+ size_t len;
+ unsigned hash : 24;
+ unsigned flag : 8;
+#define LINE_COMMON 1
+#define LINE_PATCHED 2
+};
+
+/*
+ * This represents a "file", which is an array of "lines".
+ */
+struct image {
+ char *buf;
+ size_t len;
+ size_t nr;
+ size_t alloc;
+ struct line *line_allocated;
+ struct line *line;
+};
+
+static uint32_t hash_line(const char *cp, size_t len)
+{
+ size_t i;
+ uint32_t h;
+ for (i = 0, h = 0; i < len; i++) {
+ if (!isspace(cp[i])) {
+ h = h * 3 + (cp[i] & 0xff);
+ }
+ }
+ return h;
+}
+
+/*
+ * Compare lines s1 of length n1 and s2 of length n2, ignoring
+ * whitespace difference. Returns 1 if they match, 0 otherwise
+ */
+static int fuzzy_matchlines(const char *s1, size_t n1,
+ const char *s2, size_t n2)
+{
+ const char *last1 = s1 + n1 - 1;
+ const char *last2 = s2 + n2 - 1;
+ int result = 0;
+
+ /* ignore line endings */
+ while ((*last1 == '\r') || (*last1 == '\n'))
+ last1--;
+ while ((*last2 == '\r') || (*last2 == '\n'))
+ last2--;
+
+ /* skip leading whitespaces, if both begin with whitespace */
+ if (s1 <= last1 && s2 <= last2 && isspace(*s1) && isspace(*s2)) {
+ while (isspace(*s1) && (s1 <= last1))
+ s1++;
+ while (isspace(*s2) && (s2 <= last2))
+ s2++;
+ }
+ /* early return if both lines are empty */
+ if ((s1 > last1) && (s2 > last2))
+ return 1;
+ while (!result) {
+ result = *s1++ - *s2++;
+ /*
+ * Skip whitespace inside. We check for whitespace on
+ * both buffers because we don't want "a b" to match
+ * "ab"
+ */
+ if (isspace(*s1) && isspace(*s2)) {
+ while (isspace(*s1) && s1 <= last1)
+ s1++;
+ while (isspace(*s2) && s2 <= last2)
+ s2++;
+ }
+ /*
+ * If we reached the end on one side only,
+ * lines don't match
+ */
+ if (
+ ((s2 > last2) && (s1 <= last1)) ||
+ ((s1 > last1) && (s2 <= last2)))
+ return 0;
+ if ((s1 > last1) && (s2 > last2))
+ break;
+ }
+
+ return !result;
+}
+
+static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
+{
+ ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
+ img->line_allocated[img->nr].len = len;
+ img->line_allocated[img->nr].hash = hash_line(bol, len);
+ img->line_allocated[img->nr].flag = flag;
+ img->nr++;
+}
+
+/*
+ * "buf" has the file contents to be patched (read from various sources).
+ * attach it to "image" and add line-based index to it.
+ * "image" now owns the "buf".
+ */
+static void prepare_image(struct image *image, char *buf, size_t len,
+ int prepare_linetable)
+{
+ const char *cp, *ep;
+
+ memset(image, 0, sizeof(*image));
+ image->buf = buf;
+ image->len = len;
+
+ if (!prepare_linetable)
+ return;
+
+ ep = image->buf + image->len;
+ cp = image->buf;
+ while (cp < ep) {
+ const char *next;
+ for (next = cp; next < ep && *next != '\n'; next++)
+ ;
+ if (next < ep)
+ next++;
+ add_line_info(image, cp, next - cp, 0);
+ cp = next;
+ }
+ image->line = image->line_allocated;
+}
+
+static void clear_image(struct image *image)
+{
+ free(image->buf);
+ free(image->line_allocated);
+ memset(image, 0, sizeof(*image));
+}
+
+/* fmt must contain _one_ %s and no other substitution */
+static void say_patch_name(FILE *output, const char *fmt, struct patch *patch)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ if (patch->old_name && patch->new_name &&
+ strcmp(patch->old_name, patch->new_name)) {
+ quote_c_style(patch->old_name, &sb, NULL, 0);
+ strbuf_addstr(&sb, " => ");
+ quote_c_style(patch->new_name, &sb, NULL, 0);
+ } else {
+ const char *n = patch->new_name;
+ if (!n)
+ n = patch->old_name;
+ quote_c_style(n, &sb, NULL, 0);
+ }
+ fprintf(output, fmt, sb.buf);
+ fputc('\n', output);
+ strbuf_release(&sb);
+}
+
+#define SLOP (16)
+
+static int read_patch_file(struct strbuf *sb, int fd)
+{
+ if (strbuf_read(sb, fd, 0) < 0)
+ return error_errno("git apply: failed to read");
+
+ /*
+ * Make sure that we have some slop in the buffer
+ * so that we can do speculative "memcmp" etc, and
+ * see to it that it is NUL-filled.
+ */
+ strbuf_grow(sb, SLOP);
+ memset(sb->buf + sb->len, 0, SLOP);
+ return 0;
+}
+
+static unsigned long linelen(const char *buffer, unsigned long size)
+{
+ unsigned long len = 0;
+ while (size--) {
+ len++;
+ if (*buffer++ == '\n')
+ break;
+ }
+ return len;
+}
+
+static int is_dev_null(const char *str)
+{
+ return skip_prefix(str, "/dev/null", &str) && isspace(*str);
+}
+
+#define TERM_SPACE 1
+#define TERM_TAB 2
+
+static int name_terminate(int c, int terminate)
+{
+ if (c == ' ' && !(terminate & TERM_SPACE))
+ return 0;
+ if (c == '\t' && !(terminate & TERM_TAB))
+ return 0;
+
+ return 1;
+}
+
+/* remove double slashes to make --index work with such filenames */
+static char *squash_slash(char *name)
+{
+ int i = 0, j = 0;
+
+ if (!name)
+ return NULL;
+
+ while (name[i]) {
+ if ((name[j++] = name[i++]) == '/')
+ while (name[i] == '/')
+ i++;
+ }
+ name[j] = '\0';
+ return name;
+}
+
+static char *find_name_gnu(struct apply_state *state,
+ const char *line,
+ const char *def,
+ int p_value)
+{
+ struct strbuf name = STRBUF_INIT;
+ char *cp;
+
+ /*
+ * Proposed "new-style" GNU patch/diff format; see
+ * http://marc.info/?l=git&m=112927316408690&w=2
+ */
+ if (unquote_c_style(&name, line, NULL)) {
+ strbuf_release(&name);
+ return NULL;
+ }
+
+ for (cp = name.buf; p_value; p_value--) {
+ cp = strchr(cp, '/');
+ if (!cp) {
+ strbuf_release(&name);
+ return NULL;
+ }
+ cp++;
+ }
+
+ strbuf_remove(&name, 0, cp - name.buf);
+ if (state->root.len)
+ strbuf_insert(&name, 0, state->root.buf, state->root.len);
+ return squash_slash(strbuf_detach(&name, NULL));
+}
+
+static size_t sane_tz_len(const char *line, size_t len)
+{
+ const char *tz, *p;
+
+ if (len < strlen(" +0500") || line[len-strlen(" +0500")] != ' ')
+ return 0;
+ tz = line + len - strlen(" +0500");
+
+ if (tz[1] != '+' && tz[1] != '-')
+ return 0;
+
+ for (p = tz + 2; p != line + len; p++)
+ if (!isdigit(*p))
+ return 0;
+
+ return line + len - tz;
+}
+
+static size_t tz_with_colon_len(const char *line, size_t len)
+{
+ const char *tz, *p;
+
+ if (len < strlen(" +08:00") || line[len - strlen(":00")] != ':')
+ return 0;
+ tz = line + len - strlen(" +08:00");
+
+ if (tz[0] != ' ' || (tz[1] != '+' && tz[1] != '-'))
+ return 0;
+ p = tz + 2;
+ if (!isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
+ !isdigit(*p++) || !isdigit(*p++))
+ return 0;
+
+ return line + len - tz;
+}
+
+static size_t date_len(const char *line, size_t len)
+{
+ const char *date, *p;
+
+ if (len < strlen("72-02-05") || line[len-strlen("-05")] != '-')
+ return 0;
+ p = date = line + len - strlen("72-02-05");
+
+ if (!isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
+ !isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
+ !isdigit(*p++) || !isdigit(*p++)) /* Not a date. */
+ return 0;
+
+ if (date - line >= strlen("19") &&
+ isdigit(date[-1]) && isdigit(date[-2])) /* 4-digit year */
+ date -= strlen("19");
+
+ return line + len - date;
+}
+
+static size_t short_time_len(const char *line, size_t len)
+{
+ const char *time, *p;
+
+ if (len < strlen(" 07:01:32") || line[len-strlen(":32")] != ':')
+ return 0;
+ p = time = line + len - strlen(" 07:01:32");
+
+ /* Permit 1-digit hours? */
+ if (*p++ != ' ' ||
+ !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
+ !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
+ !isdigit(*p++) || !isdigit(*p++)) /* Not a time. */
+ return 0;
+
+ return line + len - time;
+}
+
+static size_t fractional_time_len(const char *line, size_t len)
+{
+ const char *p;
+ size_t n;
+
+ /* Expected format: 19:41:17.620000023 */
+ if (!len || !isdigit(line[len - 1]))
+ return 0;
+ p = line + len - 1;
+
+ /* Fractional seconds. */
+ while (p > line && isdigit(*p))
+ p--;
+ if (*p != '.')
+ return 0;
+
+ /* Hours, minutes, and whole seconds. */
+ n = short_time_len(line, p - line);
+ if (!n)
+ return 0;
+
+ return line + len - p + n;
+}
+
+static size_t trailing_spaces_len(const char *line, size_t len)
+{
+ const char *p;
+
+ /* Expected format: ' ' x (1 or more) */
+ if (!len || line[len - 1] != ' ')
+ return 0;
+
+ p = line + len;
+ while (p != line) {
+ p--;
+ if (*p != ' ')
+ return line + len - (p + 1);
+ }
+
+ /* All spaces! */
+ return len;
+}
+
+static size_t diff_timestamp_len(const char *line, size_t len)
+{
+ const char *end = line + len;
+ size_t n;
+
+ /*
+ * Posix: 2010-07-05 19:41:17
+ * GNU: 2010-07-05 19:41:17.620000023 -0500
+ */
+
+ if (!isdigit(end[-1]))
+ return 0;
+
+ n = sane_tz_len(line, end - line);
+ if (!n)
+ n = tz_with_colon_len(line, end - line);
+ end -= n;
+
+ n = short_time_len(line, end - line);
+ if (!n)
+ n = fractional_time_len(line, end - line);
+ end -= n;
+
+ n = date_len(line, end - line);
+ if (!n) /* No date. Too bad. */
+ return 0;
+ end -= n;
+
+ if (end == line) /* No space before date. */
+ return 0;
+ if (end[-1] == '\t') { /* Success! */
+ end--;
+ return line + len - end;
+ }
+ if (end[-1] != ' ') /* No space before date. */
+ return 0;
+
+ /* Whitespace damage. */
+ end -= trailing_spaces_len(line, end - line);
+ return line + len - end;
+}
+
+static char *find_name_common(struct apply_state *state,
+ const char *line,
+ const char *def,
+ int p_value,
+ const char *end,
+ int terminate)
+{
+ int len;
+ const char *start = NULL;
+
+ if (p_value == 0)
+ start = line;
+ while (line != end) {
+ char c = *line;
+
+ if (!end && isspace(c)) {
+ if (c == '\n')
+ break;
+ if (name_terminate(c, terminate))
+ break;
+ }
+ line++;
+ if (c == '/' && !--p_value)
+ start = line;
+ }
+ if (!start)
+ return squash_slash(xstrdup_or_null(def));
+ len = line - start;
+ if (!len)
+ return squash_slash(xstrdup_or_null(def));
+
+ /*
+ * Generally we prefer the shorter name, especially
+ * if the other one is just a variation of that with
+ * something else tacked on to the end (ie "file.orig"
+ * or "file~").
+ */
+ if (def) {
+ int deflen = strlen(def);
+ if (deflen < len && !strncmp(start, def, deflen))
+ return squash_slash(xstrdup(def));
+ }
+
+ if (state->root.len) {
+ char *ret = xstrfmt("%s%.*s", state->root.buf, len, start);
+ return squash_slash(ret);
+ }
+
+ return squash_slash(xmemdupz(start, len));
+}
+
+static char *find_name(struct apply_state *state,
+ const char *line,
+ char *def,
+ int p_value,
+ int terminate)
+{
+ if (*line == '"') {
+ char *name = find_name_gnu(state, line, def, p_value);
+ if (name)
+ return name;
+ }
+
+ return find_name_common(state, line, def, p_value, NULL, terminate);
+}
+
+static char *find_name_traditional(struct apply_state *state,
+ const char *line,
+ char *def,
+ int p_value)
+{
+ size_t len;
+ size_t date_len;
+
+ if (*line == '"') {
+ char *name = find_name_gnu(state, line, def, p_value);
+ if (name)
+ return name;
+ }
+
+ len = strchrnul(line, '\n') - line;
+ date_len = diff_timestamp_len(line, len);
+ if (!date_len)
+ return find_name_common(state, line, def, p_value, NULL, TERM_TAB);
+ len -= date_len;
+
+ return find_name_common(state, line, def, p_value, line + len, 0);
+}
+
+static int count_slashes(const char *cp)
+{
+ int cnt = 0;
+ char ch;
+
+ while ((ch = *cp++))
+ if (ch == '/')
+ cnt++;
+ return cnt;
+}
+
+/*
+ * Given the string after "--- " or "+++ ", guess the appropriate
+ * p_value for the given patch.
+ */
+static int guess_p_value(struct apply_state *state, const char *nameline)
+{
+ char *name, *cp;
+ int val = -1;
+
+ if (is_dev_null(nameline))
+ return -1;
+ name = find_name_traditional(state, nameline, NULL, 0);
+ if (!name)
+ return -1;
+ cp = strchr(name, '/');
+ if (!cp)
+ val = 0;
+ else if (state->prefix) {
+ /*
+ * Does it begin with "a/$our-prefix" and such? Then this is
+ * very likely to apply to our directory.
+ */
+ if (!strncmp(name, state->prefix, state->prefix_length))
+ val = count_slashes(state->prefix);
+ else {
+ cp++;
+ if (!strncmp(cp, state->prefix, state->prefix_length))
+ val = count_slashes(state->prefix) + 1;
+ }
+ }
+ free(name);
+ return val;
+}
+
+/*
+ * Does the ---/+++ line have the POSIX timestamp after the last HT?
+ * GNU diff puts epoch there to signal a creation/deletion event. Is
+ * this such a timestamp?
+ */
+static int has_epoch_timestamp(const char *nameline)
+{
+ /*
+ * We are only interested in epoch timestamp; any non-zero
+ * fraction cannot be one, hence "(\.0+)?" in the regexp below.
+ * For the same reason, the date must be either 1969-12-31 or
+ * 1970-01-01, and the seconds part must be "00".
+ */
+ const char stamp_regexp[] =
+ "^(1969-12-31|1970-01-01)"
+ " "
+ "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?"
+ " "
+ "([-+][0-2][0-9]:?[0-5][0-9])\n";
+ const char *timestamp = NULL, *cp, *colon;
+ static regex_t *stamp;
+ regmatch_t m[10];
+ int zoneoffset;
+ int hourminute;
+ int status;
+
+ for (cp = nameline; *cp != '\n'; cp++) {
+ if (*cp == '\t')
+ timestamp = cp + 1;
+ }
+ if (!timestamp)
+ return 0;
+ if (!stamp) {
+ stamp = xmalloc(sizeof(*stamp));
+ if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) {
+ warning(_("Cannot prepare timestamp regexp %s"),
+ stamp_regexp);
+ return 0;
+ }
+ }
+
+ status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0);
+ if (status) {
+ if (status != REG_NOMATCH)
+ warning(_("regexec returned %d for input: %s"),
+ status, timestamp);
+ return 0;
+ }
+
+ zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10);
+ if (*colon == ':')
+ zoneoffset = zoneoffset * 60 + strtol(colon + 1, NULL, 10);
+ else
+ zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100);
+ if (timestamp[m[3].rm_so] == '-')
+ zoneoffset = -zoneoffset;
+
+ /*
+ * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
+ * (west of GMT) or 1970-01-01 (east of GMT)
+ */
+ if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) ||
+ (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10)))
+ return 0;
+
+ hourminute = (strtol(timestamp + 11, NULL, 10) * 60 +
+ strtol(timestamp + 14, NULL, 10) -
+ zoneoffset);
+
+ return ((zoneoffset < 0 && hourminute == 1440) ||
+ (0 <= zoneoffset && !hourminute));
+}
+
+/*
+ * Get the name etc info from the ---/+++ lines of a traditional patch header
+ *
+ * FIXME! The end-of-filename heuristics are kind of screwy. For existing
+ * files, we can happily check the index for a match, but for creating a
+ * new file we should try to match whatever "patch" does. I have no idea.
+ */
+static int parse_traditional_patch(struct apply_state *state,
+ const char *first,
+ const char *second,
+ struct patch *patch)
+{
+ char *name;
+
+ first += 4; /* skip "--- " */
+ second += 4; /* skip "+++ " */
+ if (!state->p_value_known) {
+ int p, q;
+ p = guess_p_value(state, first);
+ q = guess_p_value(state, second);
+ if (p < 0) p = q;
+ if (0 <= p && p == q) {
+ state->p_value = p;
+ state->p_value_known = 1;
+ }
+ }
+ if (is_dev_null(first)) {
+ patch->is_new = 1;
+ patch->is_delete = 0;
+ name = find_name_traditional(state, second, NULL, state->p_value);
+ patch->new_name = name;
+ } else if (is_dev_null(second)) {
+ patch->is_new = 0;
+ patch->is_delete = 1;
+ name = find_name_traditional(state, first, NULL, state->p_value);
+ patch->old_name = name;
+ } else {
+ char *first_name;
+ first_name = find_name_traditional(state, first, NULL, state->p_value);
+ name = find_name_traditional(state, second, first_name, state->p_value);
+ free(first_name);
+ if (has_epoch_timestamp(first)) {
+ patch->is_new = 1;
+ patch->is_delete = 0;
+ patch->new_name = name;
+ } else if (has_epoch_timestamp(second)) {
+ patch->is_new = 0;
+ patch->is_delete = 1;
+ patch->old_name = name;
+ } else {
+ patch->old_name = name;
+ patch->new_name = xstrdup_or_null(name);
+ }
+ }
+ if (!name)
+ return error(_("unable to find filename in patch at line %d"), state->linenr);
+
+ return 0;
+}
+
+static int gitdiff_hdrend(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ return 1;
+}
+
+/*
+ * We're anal about diff header consistency, to make
+ * sure that we don't end up having strange ambiguous
+ * patches floating around.
+ *
+ * As a result, gitdiff_{old|new}name() will check
+ * their names against any previous information, just
+ * to make sure..
+ */
+#define DIFF_OLD_NAME 0
+#define DIFF_NEW_NAME 1
+
+static int gitdiff_verify_name(struct apply_state *state,
+ const char *line,
+ int isnull,
+ char **name,
+ int side)
+{
+ if (!*name && !isnull) {
+ *name = find_name(state, line, NULL, state->p_value, TERM_TAB);
+ return 0;
+ }
+
+ if (*name) {
+ int len = strlen(*name);
+ char *another;
+ if (isnull)
+ return error(_("git apply: bad git-diff - expected /dev/null, got %s on line %d"),
+ *name, state->linenr);
+ another = find_name(state, line, NULL, state->p_value, TERM_TAB);
+ if (!another || memcmp(another, *name, len + 1)) {
+ free(another);
+ return error((side == DIFF_NEW_NAME) ?
+ _("git apply: bad git-diff - inconsistent new filename on line %d") :
+ _("git apply: bad git-diff - inconsistent old filename on line %d"), state->linenr);
+ }
+ free(another);
+ } else {
+ /* expect "/dev/null" */
+ if (memcmp("/dev/null", line, 9) || line[9] != '\n')
+ return error(_("git apply: bad git-diff - expected /dev/null on line %d"), state->linenr);
+ }
+
+ return 0;
+}
+
+static int gitdiff_oldname(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ return gitdiff_verify_name(state, line,
+ patch->is_new, &patch->old_name,
+ DIFF_OLD_NAME);
+}
+
+static int gitdiff_newname(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ return gitdiff_verify_name(state, line,
+ patch->is_delete, &patch->new_name,
+ DIFF_NEW_NAME);
+}
+
+static int gitdiff_oldmode(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->old_mode = strtoul(line, NULL, 8);
+ return 0;
+}
+
+static int gitdiff_newmode(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->new_mode = strtoul(line, NULL, 8);
+ return 0;
+}
+
+static int gitdiff_delete(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_delete = 1;
+ free(patch->old_name);
+ patch->old_name = xstrdup_or_null(patch->def_name);
+ return gitdiff_oldmode(state, line, patch);
+}
+
+static int gitdiff_newfile(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_new = 1;
+ free(patch->new_name);
+ patch->new_name = xstrdup_or_null(patch->def_name);
+ return gitdiff_newmode(state, line, patch);
+}
+
+static int gitdiff_copysrc(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_copy = 1;
+ free(patch->old_name);
+ patch->old_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
+ return 0;
+}
+
+static int gitdiff_copydst(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_copy = 1;
+ free(patch->new_name);
+ patch->new_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
+ return 0;
+}
+
+static int gitdiff_renamesrc(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_rename = 1;
+ free(patch->old_name);
+ patch->old_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
+ return 0;
+}
+
+static int gitdiff_renamedst(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ patch->is_rename = 1;
+ free(patch->new_name);
+ patch->new_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
+ return 0;
+}
+
+static int gitdiff_similarity(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ unsigned long val = strtoul(line, NULL, 10);
+ if (val <= 100)
+ patch->score = val;
+ return 0;
+}
+
+static int gitdiff_dissimilarity(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ unsigned long val = strtoul(line, NULL, 10);
+ if (val <= 100)
+ patch->score = val;
+ return 0;
+}
+
+static int gitdiff_index(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ /*
+ * index line is N hexadecimal, "..", N hexadecimal,
+ * and optional space with octal mode.
+ */
+ const char *ptr, *eol;
+ int len;
+
+ ptr = strchr(line, '.');
+ if (!ptr || ptr[1] != '.' || 40 < ptr - line)
+ return 0;
+ len = ptr - line;
+ memcpy(patch->old_sha1_prefix, line, len);
+ patch->old_sha1_prefix[len] = 0;
+
+ line = ptr + 2;
+ ptr = strchr(line, ' ');
+ eol = strchrnul(line, '\n');
+
+ if (!ptr || eol < ptr)
+ ptr = eol;
+ len = ptr - line;
+
+ if (40 < len)
+ return 0;
+ memcpy(patch->new_sha1_prefix, line, len);
+ patch->new_sha1_prefix[len] = 0;
+ if (*ptr == ' ')
+ patch->old_mode = strtoul(ptr+1, NULL, 8);
+ return 0;
+}
+
+/*
+ * This is normal for a diff that doesn't change anything: we'll fall through
+ * into the next diff. Tell the parser to break out.
+ */
+static int gitdiff_unrecognized(struct apply_state *state,
+ const char *line,
+ struct patch *patch)
+{
+ return 1;
+}
+
+/*
+ * Skip p_value leading components from "line"; as we do not accept
+ * absolute paths, return NULL in that case.
+ */
+static const char *skip_tree_prefix(struct apply_state *state,
+ const char *line,
+ int llen)
+{
+ int nslash;
+ int i;
+
+ if (!state->p_value)
+ return (llen && line[0] == '/') ? NULL : line;
+
+ nslash = state->p_value;
+ for (i = 0; i < llen; i++) {
+ int ch = line[i];
+ if (ch == '/' && --nslash <= 0)
+ return (i == 0) ? NULL : &line[i + 1];
+ }
+ return NULL;
+}
+
+/*
+ * This is to extract the same name that appears on "diff --git"
+ * line. We do not find and return anything if it is a rename
+ * patch, and it is OK because we will find the name elsewhere.
+ * We need to reliably find name only when it is mode-change only,
+ * creation or deletion of an empty file. In any of these cases,
+ * both sides are the same name under a/ and b/ respectively.
+ */
+static char *git_header_name(struct apply_state *state,
+ const char *line,
+ int llen)
+{
+ const char *name;
+ const char *second = NULL;
+ size_t len, line_len;
+
+ line += strlen("diff --git ");
+ llen -= strlen("diff --git ");
+
+ if (*line == '"') {
+ const char *cp;
+ struct strbuf first = STRBUF_INIT;
+ struct strbuf sp = STRBUF_INIT;
+
+ if (unquote_c_style(&first, line, &second))
+ goto free_and_fail1;
+
+ /* strip the a/b prefix including trailing slash */
+ cp = skip_tree_prefix(state, first.buf, first.len);
+ if (!cp)
+ goto free_and_fail1;
+ strbuf_remove(&first, 0, cp - first.buf);
+
+ /*
+ * second points at one past closing dq of name.
+ * find the second name.
+ */
+ while ((second < line + llen) && isspace(*second))
+ second++;
+
+ if (line + llen <= second)
+ goto free_and_fail1;
+ if (*second == '"') {
+ if (unquote_c_style(&sp, second, NULL))
+ goto free_and_fail1;
+ cp = skip_tree_prefix(state, sp.buf, sp.len);
+ if (!cp)
+ goto free_and_fail1;
+ /* They must match, otherwise ignore */
+ if (strcmp(cp, first.buf))
+ goto free_and_fail1;
+ strbuf_release(&sp);
+ return strbuf_detach(&first, NULL);
+ }
+
+ /* unquoted second */
+ cp = skip_tree_prefix(state, second, line + llen - second);
+ if (!cp)
+ goto free_and_fail1;
+ if (line + llen - cp != first.len ||
+ memcmp(first.buf, cp, first.len))
+ goto free_and_fail1;
+ return strbuf_detach(&first, NULL);
+
+ free_and_fail1:
+ strbuf_release(&first);
+ strbuf_release(&sp);
+ return NULL;
+ }
+
+ /* unquoted first name */
+ name = skip_tree_prefix(state, line, llen);
+ if (!name)
+ return NULL;
+
+ /*
+ * since the first name is unquoted, a dq if exists must be
+ * the beginning of the second name.
+ */
+ for (second = name; second < line + llen; second++) {
+ if (*second == '"') {
+ struct strbuf sp = STRBUF_INIT;
+ const char *np;
+
+ if (unquote_c_style(&sp, second, NULL))
+ goto free_and_fail2;
+
+ np = skip_tree_prefix(state, sp.buf, sp.len);
+ if (!np)
+ goto free_and_fail2;
+
+ len = sp.buf + sp.len - np;
+ if (len < second - name &&
+ !strncmp(np, name, len) &&
+ isspace(name[len])) {
+ /* Good */
+ strbuf_remove(&sp, 0, np - sp.buf);
+ return strbuf_detach(&sp, NULL);
+ }
+
+ free_and_fail2:
+ strbuf_release(&sp);
+ return NULL;
+ }
+ }
+
+ /*
+ * Accept a name only if it shows up twice, exactly the same
+ * form.
+ */
+ second = strchr(name, '\n');
+ if (!second)
+ return NULL;
+ line_len = second - name;
+ for (len = 0 ; ; len++) {
+ switch (name[len]) {
+ default:
+ continue;
+ case '\n':
+ return NULL;
+ case '\t': case ' ':
+ /*
+ * Is this the separator between the preimage
+ * and the postimage pathname? Again, we are
+ * only interested in the case where there is
+ * no rename, as this is only to set def_name
+ * and a rename patch has the names elsewhere
+ * in an unambiguous form.
+ */
+ if (!name[len + 1])
+ return NULL; /* no postimage name */
+ second = skip_tree_prefix(state, name + len + 1,
+ line_len - (len + 1));
+ if (!second)
+ return NULL;
+ /*
+ * Does len bytes starting at "name" and "second"
+ * (that are separated by one HT or SP we just
+ * found) exactly match?
+ */
+ if (second[len] == '\n' && !strncmp(name, second, len))
+ return xmemdupz(name, len);
+ }
+ }
+}
+
+/* Verify that we recognize the lines following a git header */
+static int parse_git_header(struct apply_state *state,
+ const char *line,
+ int len,
+ unsigned int size,
+ struct patch *patch)
+{
+ unsigned long offset;
+
+ /* A git diff has explicit new/delete information, so we don't guess */
+ patch->is_new = 0;
+ patch->is_delete = 0;
+
+ /*
+ * Some things may not have the old name in the
+ * rest of the headers anywhere (pure mode changes,
+ * or removing or adding empty files), so we get
+ * the default name from the header.
+ */
+ patch->def_name = git_header_name(state, line, len);
+ if (patch->def_name && state->root.len) {
+ char *s = xstrfmt("%s%s", state->root.buf, patch->def_name);
+ free(patch->def_name);
+ patch->def_name = s;
+ }
+
+ line += len;
+ size -= len;
+ state->linenr++;
+ for (offset = len ; size > 0 ; offset += len, size -= len, line += len, state->linenr++) {
+ static const struct opentry {
+ const char *str;
+ int (*fn)(struct apply_state *, const char *, struct patch *);
+ } optable[] = {
+ { "@@ -", gitdiff_hdrend },
+ { "--- ", gitdiff_oldname },
+ { "+++ ", gitdiff_newname },
+ { "old mode ", gitdiff_oldmode },
+ { "new mode ", gitdiff_newmode },
+ { "deleted file mode ", gitdiff_delete },
+ { "new file mode ", gitdiff_newfile },
+ { "copy from ", gitdiff_copysrc },
+ { "copy to ", gitdiff_copydst },
+ { "rename old ", gitdiff_renamesrc },
+ { "rename new ", gitdiff_renamedst },
+ { "rename from ", gitdiff_renamesrc },
+ { "rename to ", gitdiff_renamedst },
+ { "similarity index ", gitdiff_similarity },
+ { "dissimilarity index ", gitdiff_dissimilarity },
+ { "index ", gitdiff_index },
+ { "", gitdiff_unrecognized },
+ };
+ int i;
+
+ len = linelen(line, size);
+ if (!len || line[len-1] != '\n')
+ break;
+ for (i = 0; i < ARRAY_SIZE(optable); i++) {
+ const struct opentry *p = optable + i;
+ int oplen = strlen(p->str);
+ int res;
+ if (len < oplen || memcmp(p->str, line, oplen))
+ continue;
+ res = p->fn(state, line + oplen, patch);
+ if (res < 0)
+ return -1;
+ if (res > 0)
+ return offset;
+ break;
+ }
+ }
+
+ return offset;
+}
+
+static int parse_num(const char *line, unsigned long *p)
+{
+ char *ptr;
+
+ if (!isdigit(*line))
+ return 0;
+ *p = strtoul(line, &ptr, 10);
+ return ptr - line;
+}
+
+static int parse_range(const char *line, int len, int offset, const char *expect,
+ unsigned long *p1, unsigned long *p2)
+{
+ int digits, ex;
+
+ if (offset < 0 || offset >= len)
+ return -1;
+ line += offset;
+ len -= offset;
+
+ digits = parse_num(line, p1);
+ if (!digits)
+ return -1;
+
+ offset += digits;
+ line += digits;
+ len -= digits;
+
+ *p2 = 1;
+ if (*line == ',') {
+ digits = parse_num(line+1, p2);
+ if (!digits)
+ return -1;
+
+ offset += digits+1;
+ line += digits+1;
+ len -= digits+1;
+ }
+
+ ex = strlen(expect);
+ if (ex > len)
+ return -1;
+ if (memcmp(line, expect, ex))
+ return -1;
+
+ return offset + ex;
+}
+
+static void recount_diff(const char *line, int size, struct fragment *fragment)
+{
+ int oldlines = 0, newlines = 0, ret = 0;
+
+ if (size < 1) {
+ warning("recount: ignore empty hunk");
+ return;
+ }
+
+ for (;;) {
+ int len = linelen(line, size);
+ size -= len;
+ line += len;
+
+ if (size < 1)
+ break;
+
+ switch (*line) {
+ case ' ': case '\n':
+ newlines++;
+ /* fall through */
+ case '-':
+ oldlines++;
+ continue;
+ case '+':
+ newlines++;
+ continue;
+ case '\\':
+ continue;
+ case '@':
+ ret = size < 3 || !starts_with(line, "@@ ");
+ break;
+ case 'd':
+ ret = size < 5 || !starts_with(line, "diff ");
+ break;
+ default:
+ ret = -1;
+ break;
+ }
+ if (ret) {
+ warning(_("recount: unexpected line: %.*s"),
+ (int)linelen(line, size), line);
+ return;
+ }
+ break;
+ }
+ fragment->oldlines = oldlines;
+ fragment->newlines = newlines;
+}
+
+/*
+ * Parse a unified diff fragment header of the
+ * form "@@ -a,b +c,d @@"
+ */
+static int parse_fragment_header(const char *line, int len, struct fragment *fragment)
+{
+ int offset;
+
+ if (!len || line[len-1] != '\n')
+ return -1;
+
+ /* Figure out the number of lines in a fragment */
+ offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
+ offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
+
+ return offset;
+}
+
+/*
+ * Find file diff header
+ *
+ * Returns:
+ * -1 if no header was found
+ * -128 in case of error
+ * the size of the header in bytes (called "offset") otherwise
+ */
+static int find_header(struct apply_state *state,
+ const char *line,
+ unsigned long size,
+ int *hdrsize,
+ struct patch *patch)
+{
+ unsigned long offset, len;
+
+ patch->is_toplevel_relative = 0;
+ patch->is_rename = patch->is_copy = 0;
+ patch->is_new = patch->is_delete = -1;
+ patch->old_mode = patch->new_mode = 0;
+ patch->old_name = patch->new_name = NULL;
+ for (offset = 0; size > 0; offset += len, size -= len, line += len, state->linenr++) {
+ unsigned long nextlen;
+
+ len = linelen(line, size);
+ if (!len)
+ break;
+
+ /* Testing this early allows us to take a few shortcuts.. */
+ if (len < 6)
+ continue;
+
+ /*
+ * Make sure we don't find any unconnected patch fragments.
+ * That's a sign that we didn't find a header, and that a
+ * patch has become corrupted/broken up.
+ */
+ if (!memcmp("@@ -", line, 4)) {
+ struct fragment dummy;
+ if (parse_fragment_header(line, len, &dummy) < 0)
+ continue;
+ error(_("patch fragment without header at line %d: %.*s"),
+ state->linenr, (int)len-1, line);
+ return -128;
+ }
+
+ if (size < len + 6)
+ break;
+
+ /*
+ * Git patch? It might not have a real patch, just a rename
+ * or mode change, so we handle that specially
+ */
+ if (!memcmp("diff --git ", line, 11)) {
+ int git_hdr_len = parse_git_header(state, line, len, size, patch);
+ if (git_hdr_len < 0)
+ return -128;
+ if (git_hdr_len <= len)
+ continue;
+ if (!patch->old_name && !patch->new_name) {
+ if (!patch->def_name) {
+ error(Q_("git diff header lacks filename information when removing "
+ "%d leading pathname component (line %d)",
+ "git diff header lacks filename information when removing "
+ "%d leading pathname components (line %d)",
+ state->p_value),
+ state->p_value, state->linenr);
+ return -128;
+ }
+ patch->old_name = xstrdup(patch->def_name);
+ patch->new_name = xstrdup(patch->def_name);
+ }
+ if (!patch->is_delete && !patch->new_name) {
+ error("git diff header lacks filename information "
+ "(line %d)", state->linenr);
+ return -128;
+ }
+ patch->is_toplevel_relative = 1;
+ *hdrsize = git_hdr_len;
+ return offset;
+ }
+
+ /* --- followed by +++ ? */
+ if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
+ continue;
+
+ /*
+ * We only accept unified patches, so we want it to
+ * at least have "@@ -a,b +c,d @@\n", which is 14 chars
+ * minimum ("@@ -0,0 +1 @@\n" is the shortest).
+ */
+ nextlen = linelen(line + len, size - len);
+ if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
+ continue;
+
+ /* Ok, we'll consider it a patch */
+ if (parse_traditional_patch(state, line, line+len, patch))
+ return -128;
+ *hdrsize = len + nextlen;
+ state->linenr += 2;
+ return offset;
+ }
+ return -1;
+}
+
+static void record_ws_error(struct apply_state *state,
+ unsigned result,
+ const char *line,
+ int len,
+ int linenr)
+{
+ char *err;
+
+ if (!result)
+ return;
+
+ state->whitespace_error++;
+ if (state->squelch_whitespace_errors &&
+ state->squelch_whitespace_errors < state->whitespace_error)
+ return;
+
+ err = whitespace_error_string(result);
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf(stderr, "%s:%d: %s.\n%.*s\n",
+ state->patch_input_file, linenr, err, len, line);
+ free(err);
+}
+
+static void check_whitespace(struct apply_state *state,
+ const char *line,
+ int len,
+ unsigned ws_rule)
+{
+ unsigned result = ws_check(line + 1, len - 1, ws_rule);
+
+ record_ws_error(state, result, line + 1, len - 2, state->linenr);
+}
+
+/*
+ * Parse a unified diff. Note that this really needs to parse each
+ * fragment separately, since the only way to know the difference
+ * between a "---" that is part of a patch, and a "---" that starts
+ * the next patch is to look at the line counts..
+ */
+static int parse_fragment(struct apply_state *state,
+ const char *line,
+ unsigned long size,
+ struct patch *patch,
+ struct fragment *fragment)
+{
+ int added, deleted;
+ int len = linelen(line, size), offset;
+ unsigned long oldlines, newlines;
+ unsigned long leading, trailing;
+
+ offset = parse_fragment_header(line, len, fragment);
+ if (offset < 0)
+ return -1;
+ if (offset > 0 && patch->recount)
+ recount_diff(line + offset, size - offset, fragment);
+ oldlines = fragment->oldlines;
+ newlines = fragment->newlines;
+ leading = 0;
+ trailing = 0;
+
+ /* Parse the thing.. */
+ line += len;
+ size -= len;
+ state->linenr++;
+ added = deleted = 0;
+ for (offset = len;
+ 0 < size;
+ offset += len, size -= len, line += len, state->linenr++) {
+ if (!oldlines && !newlines)
+ break;
+ len = linelen(line, size);
+ if (!len || line[len-1] != '\n')
+ return -1;
+ switch (*line) {
+ default:
+ return -1;
+ case '\n': /* newer GNU diff, an empty context line */
+ case ' ':
+ oldlines--;
+ newlines--;
+ if (!deleted && !added)
+ leading++;
+ trailing++;
+ if (!state->apply_in_reverse &&
+ state->ws_error_action == correct_ws_error)
+ check_whitespace(state, line, len, patch->ws_rule);
+ break;
+ case '-':
+ if (state->apply_in_reverse &&
+ state->ws_error_action != nowarn_ws_error)
+ check_whitespace(state, line, len, patch->ws_rule);
+ deleted++;
+ oldlines--;
+ trailing = 0;
+ break;
+ case '+':
+ if (!state->apply_in_reverse &&
+ state->ws_error_action != nowarn_ws_error)
+ check_whitespace(state, line, len, patch->ws_rule);
+ added++;
+ newlines--;
+ trailing = 0;
+ break;
+
+ /*
+ * We allow "\ No newline at end of file". Depending
+ * on locale settings when the patch was produced we
+ * don't know what this line looks like. The only
+ * thing we do know is that it begins with "\ ".
+ * Checking for 12 is just for sanity check -- any
+ * l10n of "\ No newline..." is at least that long.
+ */
+ case '\\':
+ if (len < 12 || memcmp(line, "\\ ", 2))
+ return -1;
+ break;
+ }
+ }
+ if (oldlines || newlines)
+ return -1;
+ if (!deleted && !added)
+ return -1;
+
+ fragment->leading = leading;
+ fragment->trailing = trailing;
+
+ /*
+ * If a fragment ends with an incomplete line, we failed to include
+ * it in the above loop because we hit oldlines == newlines == 0
+ * before seeing it.
+ */
+ if (12 < size && !memcmp(line, "\\ ", 2))
+ offset += linelen(line, size);
+
+ patch->lines_added += added;
+ patch->lines_deleted += deleted;
+
+ if (0 < patch->is_new && oldlines)
+ return error(_("new file depends on old contents"));
+ if (0 < patch->is_delete && newlines)
+ return error(_("deleted file still has contents"));
+ return offset;
+}
+
+/*
+ * We have seen "diff --git a/... b/..." header (or a traditional patch
+ * header). Read hunks that belong to this patch into fragments and hang
+ * them to the given patch structure.
+ *
+ * The (fragment->patch, fragment->size) pair points into the memory given
+ * by the caller, not a copy, when we return.
+ *
+ * Returns:
+ * -1 in case of error,
+ * the number of bytes in the patch otherwise.
+ */
+static int parse_single_patch(struct apply_state *state,
+ const char *line,
+ unsigned long size,
+ struct patch *patch)
+{
+ unsigned long offset = 0;
+ unsigned long oldlines = 0, newlines = 0, context = 0;
+ struct fragment **fragp = &patch->fragments;
+
+ while (size > 4 && !memcmp(line, "@@ -", 4)) {
+ struct fragment *fragment;
+ int len;
+
+ fragment = xcalloc(1, sizeof(*fragment));
+ fragment->linenr = state->linenr;
+ len = parse_fragment(state, line, size, patch, fragment);
+ if (len <= 0) {
+ free(fragment);
+ return error(_("corrupt patch at line %d"), state->linenr);
+ }
+ fragment->patch = line;
+ fragment->size = len;
+ oldlines += fragment->oldlines;
+ newlines += fragment->newlines;
+ context += fragment->leading + fragment->trailing;
+
+ *fragp = fragment;
+ fragp = &fragment->next;
+
+ offset += len;
+ line += len;
+ size -= len;
+ }
+
+ /*
+ * If something was removed (i.e. we have old-lines) it cannot
+ * be creation, and if something was added it cannot be
+ * deletion. However, the reverse is not true; --unified=0
+ * patches that only add are not necessarily creation even
+ * though they do not have any old lines, and ones that only
+ * delete are not necessarily deletion.
+ *
+ * Unfortunately, a real creation/deletion patch do _not_ have
+ * any context line by definition, so we cannot safely tell it
+ * apart with --unified=0 insanity. At least if the patch has
+ * more than one hunk it is not creation or deletion.
+ */
+ if (patch->is_new < 0 &&
+ (oldlines || (patch->fragments && patch->fragments->next)))
+ patch->is_new = 0;
+ if (patch->is_delete < 0 &&
+ (newlines || (patch->fragments && patch->fragments->next)))
+ patch->is_delete = 0;
+
+ if (0 < patch->is_new && oldlines)
+ return error(_("new file %s depends on old contents"), patch->new_name);
+ if (0 < patch->is_delete && newlines)
+ return error(_("deleted file %s still has contents"), patch->old_name);
+ if (!patch->is_delete && !newlines && context && state->apply_verbosity > verbosity_silent)
+ fprintf_ln(stderr,
+ _("** warning: "
+ "file %s becomes empty but is not deleted"),
+ patch->new_name);
+
+ return offset;
+}
+
+static inline int metadata_changes(struct patch *patch)
+{
+ return patch->is_rename > 0 ||
+ patch->is_copy > 0 ||
+ patch->is_new > 0 ||
+ patch->is_delete ||
+ (patch->old_mode && patch->new_mode &&
+ patch->old_mode != patch->new_mode);
+}
+
+static char *inflate_it(const void *data, unsigned long size,
+ unsigned long inflated_size)
+{
+ git_zstream stream;
+ void *out;
+ int st;
+
+ memset(&stream, 0, sizeof(stream));
+
+ stream.next_in = (unsigned char *)data;
+ stream.avail_in = size;
+ stream.next_out = out = xmalloc(inflated_size);
+ stream.avail_out = inflated_size;
+ git_inflate_init(&stream);
+ st = git_inflate(&stream, Z_FINISH);
+ git_inflate_end(&stream);
+ if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
+ free(out);
+ return NULL;
+ }
+ return out;
+}
+
+/*
+ * Read a binary hunk and return a new fragment; fragment->patch
+ * points at an allocated memory that the caller must free, so
+ * it is marked as "->free_patch = 1".
+ */
+static struct fragment *parse_binary_hunk(struct apply_state *state,
+ char **buf_p,
+ unsigned long *sz_p,
+ int *status_p,
+ int *used_p)
+{
+ /*
+ * Expect a line that begins with binary patch method ("literal"
+ * or "delta"), followed by the length of data before deflating.
+ * a sequence of 'length-byte' followed by base-85 encoded data
+ * should follow, terminated by a newline.
+ *
+ * Each 5-byte sequence of base-85 encodes up to 4 bytes,
+ * and we would limit the patch line to 66 characters,
+ * so one line can fit up to 13 groups that would decode
+ * to 52 bytes max. The length byte 'A'-'Z' corresponds
+ * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
+ */
+ int llen, used;
+ unsigned long size = *sz_p;
+ char *buffer = *buf_p;
+ int patch_method;
+ unsigned long origlen;
+ char *data = NULL;
+ int hunk_size = 0;
+ struct fragment *frag;
+
+ llen = linelen(buffer, size);
+ used = llen;
+
+ *status_p = 0;
+
+ if (starts_with(buffer, "delta ")) {
+ patch_method = BINARY_DELTA_DEFLATED;
+ origlen = strtoul(buffer + 6, NULL, 10);
+ }
+ else if (starts_with(buffer, "literal ")) {
+ patch_method = BINARY_LITERAL_DEFLATED;
+ origlen = strtoul(buffer + 8, NULL, 10);
+ }
+ else
+ return NULL;
+
+ state->linenr++;
+ buffer += llen;
+ while (1) {
+ int byte_length, max_byte_length, newsize;
+ llen = linelen(buffer, size);
+ used += llen;
+ state->linenr++;
+ if (llen == 1) {
+ /* consume the blank line */
+ buffer++;
+ size--;
+ break;
+ }
+ /*
+ * Minimum line is "A00000\n" which is 7-byte long,
+ * and the line length must be multiple of 5 plus 2.
+ */
+ if ((llen < 7) || (llen-2) % 5)
+ goto corrupt;
+ max_byte_length = (llen - 2) / 5 * 4;
+ byte_length = *buffer;
+ if ('A' <= byte_length && byte_length <= 'Z')
+ byte_length = byte_length - 'A' + 1;
+ else if ('a' <= byte_length && byte_length <= 'z')
+ byte_length = byte_length - 'a' + 27;
+ else
+ goto corrupt;
+ /* if the input length was not multiple of 4, we would
+ * have filler at the end but the filler should never
+ * exceed 3 bytes
+ */
+ if (max_byte_length < byte_length ||
+ byte_length <= max_byte_length - 4)
+ goto corrupt;
+ newsize = hunk_size + byte_length;
+ data = xrealloc(data, newsize);
+ if (decode_85(data + hunk_size, buffer + 1, byte_length))
+ goto corrupt;
+ hunk_size = newsize;
+ buffer += llen;
+ size -= llen;
+ }
+
+ frag = xcalloc(1, sizeof(*frag));
+ frag->patch = inflate_it(data, hunk_size, origlen);
+ frag->free_patch = 1;
+ if (!frag->patch)
+ goto corrupt;
+ free(data);
+ frag->size = origlen;
+ *buf_p = buffer;
+ *sz_p = size;
+ *used_p = used;
+ frag->binary_patch_method = patch_method;
+ return frag;
+
+ corrupt:
+ free(data);
+ *status_p = -1;
+ error(_("corrupt binary patch at line %d: %.*s"),
+ state->linenr-1, llen-1, buffer);
+ return NULL;
+}
+
+/*
+ * Returns:
+ * -1 in case of error,
+ * the length of the parsed binary patch otherwise
+ */
+static int parse_binary(struct apply_state *state,
+ char *buffer,
+ unsigned long size,
+ struct patch *patch)
+{
+ /*
+ * We have read "GIT binary patch\n"; what follows is a line
+ * that says the patch method (currently, either "literal" or
+ * "delta") and the length of data before deflating; a
+ * sequence of 'length-byte' followed by base-85 encoded data
+ * follows.
+ *
+ * When a binary patch is reversible, there is another binary
+ * hunk in the same format, starting with patch method (either
+ * "literal" or "delta") with the length of data, and a sequence
+ * of length-byte + base-85 encoded data, terminated with another
+ * empty line. This data, when applied to the postimage, produces
+ * the preimage.
+ */
+ struct fragment *forward;
+ struct fragment *reverse;
+ int status;
+ int used, used_1;
+
+ forward = parse_binary_hunk(state, &buffer, &size, &status, &used);
+ if (!forward && !status)
+ /* there has to be one hunk (forward hunk) */
+ return error(_("unrecognized binary patch at line %d"), state->linenr-1);
+ if (status)
+ /* otherwise we already gave an error message */
+ return status;
+
+ reverse = parse_binary_hunk(state, &buffer, &size, &status, &used_1);
+ if (reverse)
+ used += used_1;
+ else if (status) {
+ /*
+ * Not having reverse hunk is not an error, but having
+ * a corrupt reverse hunk is.
+ */
+ free((void*) forward->patch);
+ free(forward);
+ return status;
+ }
+ forward->next = reverse;
+ patch->fragments = forward;
+ patch->is_binary = 1;
+ return used;
+}
+
+static void prefix_one(struct apply_state *state, char **name)
+{
+ char *old_name = *name;
+ if (!old_name)
+ return;
+ *name = xstrdup(prefix_filename(state->prefix, state->prefix_length, *name));
+ free(old_name);
+}
+
+static void prefix_patch(struct apply_state *state, struct patch *p)
+{
+ if (!state->prefix || p->is_toplevel_relative)
+ return;
+ prefix_one(state, &p->new_name);
+ prefix_one(state, &p->old_name);
+}
+
+/*
+ * include/exclude
+ */
+
+static void add_name_limit(struct apply_state *state,
+ const char *name,
+ int exclude)
+{
+ struct string_list_item *it;
+
+ it = string_list_append(&state->limit_by_name, name);
+ it->util = exclude ? NULL : (void *) 1;
+}
+
+static int use_patch(struct apply_state *state, struct patch *p)
+{
+ const char *pathname = p->new_name ? p->new_name : p->old_name;
+ int i;
+
+ /* Paths outside are not touched regardless of "--include" */
+ if (0 < state->prefix_length) {
+ int pathlen = strlen(pathname);
+ if (pathlen <= state->prefix_length ||
+ memcmp(state->prefix, pathname, state->prefix_length))
+ return 0;
+ }
+
+ /* See if it matches any of exclude/include rule */
+ for (i = 0; i < state->limit_by_name.nr; i++) {
+ struct string_list_item *it = &state->limit_by_name.items[i];
+ if (!wildmatch(it->string, pathname, 0, NULL))
+ return (it->util != NULL);
+ }
+
+ /*
+ * If we had any include, a path that does not match any rule is
+ * not used. Otherwise, we saw bunch of exclude rules (or none)
+ * and such a path is used.
+ */
+ return !state->has_include;
+}
+
+/*
+ * Read the patch text in "buffer" that extends for "size" bytes; stop
+ * reading after seeing a single patch (i.e. changes to a single file).
+ * Create fragments (i.e. patch hunks) and hang them to the given patch.
+ *
+ * Returns:
+ * -1 if no header was found or parse_binary() failed,
+ * -128 on another error,
+ * the number of bytes consumed otherwise,
+ * so that the caller can call us again for the next patch.
+ */
+static int parse_chunk(struct apply_state *state, char *buffer, unsigned long size, struct patch *patch)
+{
+ int hdrsize, patchsize;
+ int offset = find_header(state, buffer, size, &hdrsize, patch);
+
+ if (offset < 0)
+ return offset;
+
+ prefix_patch(state, patch);
+
+ if (!use_patch(state, patch))
+ patch->ws_rule = 0;
+ else
+ patch->ws_rule = whitespace_rule(patch->new_name
+ ? patch->new_name
+ : patch->old_name);
+
+ patchsize = parse_single_patch(state,
+ buffer + offset + hdrsize,
+ size - offset - hdrsize,
+ patch);
+
+ if (patchsize < 0)
+ return -128;
+
+ if (!patchsize) {
+ static const char git_binary[] = "GIT binary patch\n";
+ int hd = hdrsize + offset;
+ unsigned long llen = linelen(buffer + hd, size - hd);
+
+ if (llen == sizeof(git_binary) - 1 &&
+ !memcmp(git_binary, buffer + hd, llen)) {
+ int used;
+ state->linenr++;
+ used = parse_binary(state, buffer + hd + llen,
+ size - hd - llen, patch);
+ if (used < 0)
+ return -1;
+ if (used)
+ patchsize = used + llen;
+ else
+ patchsize = 0;
+ }
+ else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
+ static const char *binhdr[] = {
+ "Binary files ",
+ "Files ",
+ NULL,
+ };
+ int i;
+ for (i = 0; binhdr[i]; i++) {
+ int len = strlen(binhdr[i]);
+ if (len < size - hd &&
+ !memcmp(binhdr[i], buffer + hd, len)) {
+ state->linenr++;
+ patch->is_binary = 1;
+ patchsize = llen;
+ break;
+ }
+ }
+ }
+
+ /* Empty patch cannot be applied if it is a text patch
+ * without metadata change. A binary patch appears
+ * empty to us here.
+ */
+ if ((state->apply || state->check) &&
+ (!patch->is_binary && !metadata_changes(patch))) {
+ error(_("patch with only garbage at line %d"), state->linenr);
+ return -128;
+ }
+ }
+
+ return offset + hdrsize + patchsize;
+}
+
+#define swap(a,b) myswap((a),(b),sizeof(a))
+
+#define myswap(a, b, size) do { \
+ unsigned char mytmp[size]; \
+ memcpy(mytmp, &a, size); \
+ memcpy(&a, &b, size); \
+ memcpy(&b, mytmp, size); \
+} while (0)
+
+static void reverse_patches(struct patch *p)
+{
+ for (; p; p = p->next) {
+ struct fragment *frag = p->fragments;
+
+ swap(p->new_name, p->old_name);
+ swap(p->new_mode, p->old_mode);
+ swap(p->is_new, p->is_delete);
+ swap(p->lines_added, p->lines_deleted);
+ swap(p->old_sha1_prefix, p->new_sha1_prefix);
+
+ for (; frag; frag = frag->next) {
+ swap(frag->newpos, frag->oldpos);
+ swap(frag->newlines, frag->oldlines);
+ }
+ }
+}
+
+static const char pluses[] =
+"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
+static const char minuses[]=
+"----------------------------------------------------------------------";
+
+static void show_stats(struct apply_state *state, struct patch *patch)
+{
+ struct strbuf qname = STRBUF_INIT;
+ char *cp = patch->new_name ? patch->new_name : patch->old_name;
+ int max, add, del;
+
+ quote_c_style(cp, &qname, NULL, 0);
+
+ /*
+ * "scale" the filename
+ */
+ max = state->max_len;
+ if (max > 50)
+ max = 50;
+
+ if (qname.len > max) {
+ cp = strchr(qname.buf + qname.len + 3 - max, '/');
+ if (!cp)
+ cp = qname.buf + qname.len + 3 - max;
+ strbuf_splice(&qname, 0, cp - qname.buf, "...", 3);
+ }
+
+ if (patch->is_binary) {
+ printf(" %-*s | Bin\n", max, qname.buf);
+ strbuf_release(&qname);
+ return;
+ }
+
+ printf(" %-*s |", max, qname.buf);
+ strbuf_release(&qname);
+
+ /*
+ * scale the add/delete
+ */
+ max = max + state->max_change > 70 ? 70 - max : state->max_change;
+ add = patch->lines_added;
+ del = patch->lines_deleted;
+
+ if (state->max_change > 0) {
+ int total = ((add + del) * max + state->max_change / 2) / state->max_change;
+ add = (add * max + state->max_change / 2) / state->max_change;
+ del = total - add;
+ }
+ printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted,
+ add, pluses, del, minuses);
+}
+
+static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
+{
+ switch (st->st_mode & S_IFMT) {
+ case S_IFLNK:
+ if (strbuf_readlink(buf, path, st->st_size) < 0)
+ return error(_("unable to read symlink %s"), path);
+ return 0;
+ case S_IFREG:
+ if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
+ return error(_("unable to open or read %s"), path);
+ convert_to_git(path, buf->buf, buf->len, buf, 0);
+ return 0;
+ default:
+ return -1;
+ }
+}
+
+/*
+ * Update the preimage, and the common lines in postimage,
+ * from buffer buf of length len. If postlen is 0 the postimage
+ * is updated in place, otherwise it's updated on a new buffer
+ * of length postlen
+ */
+
+static void update_pre_post_images(struct image *preimage,
+ struct image *postimage,
+ char *buf,
+ size_t len, size_t postlen)
+{
+ int i, ctx, reduced;
+ char *new, *old, *fixed;
+ struct image fixed_preimage;
+
+ /*
+ * Update the preimage with whitespace fixes. Note that we
+ * are not losing preimage->buf -- apply_one_fragment() will
+ * free "oldlines".
+ */
+ prepare_image(&fixed_preimage, buf, len, 1);
+ assert(postlen
+ ? fixed_preimage.nr == preimage->nr
+ : fixed_preimage.nr <= preimage->nr);
+ for (i = 0; i < fixed_preimage.nr; i++)
+ fixed_preimage.line[i].flag = preimage->line[i].flag;
+ free(preimage->line_allocated);
+ *preimage = fixed_preimage;
+
+ /*
+ * Adjust the common context lines in postimage. This can be
+ * done in-place when we are shrinking it with whitespace
+ * fixing, but needs a new buffer when ignoring whitespace or
+ * expanding leading tabs to spaces.
+ *
+ * We trust the caller to tell us if the update can be done
+ * in place (postlen==0) or not.
+ */
+ old = postimage->buf;
+ if (postlen)
+ new = postimage->buf = xmalloc(postlen);
+ else
+ new = old;
+ fixed = preimage->buf;
+
+ for (i = reduced = ctx = 0; i < postimage->nr; i++) {
+ size_t l_len = postimage->line[i].len;
+ if (!(postimage->line[i].flag & LINE_COMMON)) {
+ /* an added line -- no counterparts in preimage */
+ memmove(new, old, l_len);
+ old += l_len;
+ new += l_len;
+ continue;
+ }
+
+ /* a common context -- skip it in the original postimage */
+ old += l_len;
+
+ /* and find the corresponding one in the fixed preimage */
+ while (ctx < preimage->nr &&
+ !(preimage->line[ctx].flag & LINE_COMMON)) {
+ fixed += preimage->line[ctx].len;
+ ctx++;
+ }
+
+ /*
+ * preimage is expected to run out, if the caller
+ * fixed addition of trailing blank lines.
+ */
+ if (preimage->nr <= ctx) {
+ reduced++;
+ continue;
+ }
+
+ /* and copy it in, while fixing the line length */
+ l_len = preimage->line[ctx].len;
+ memcpy(new, fixed, l_len);
+ new += l_len;
+ fixed += l_len;
+ postimage->line[i].len = l_len;
+ ctx++;
+ }
+
+ if (postlen
+ ? postlen < new - postimage->buf
+ : postimage->len < new - postimage->buf)
+ die("BUG: caller miscounted postlen: asked %d, orig = %d, used = %d",
+ (int)postlen, (int) postimage->len, (int)(new - postimage->buf));
+
+ /* Fix the length of the whole thing */
+ postimage->len = new - postimage->buf;
+ postimage->nr -= reduced;
+}
+
+static int line_by_line_fuzzy_match(struct image *img,
+ struct image *preimage,
+ struct image *postimage,
+ unsigned long try,
+ int try_lno,
+ int preimage_limit)
+{
+ int i;
+ size_t imgoff = 0;
+ size_t preoff = 0;
+ size_t postlen = postimage->len;
+ size_t extra_chars;
+ char *buf;
+ char *preimage_eof;
+ char *preimage_end;
+ struct strbuf fixed;
+ char *fixed_buf;
+ size_t fixed_len;
+
+ for (i = 0; i < preimage_limit; i++) {
+ size_t prelen = preimage->line[i].len;
+ size_t imglen = img->line[try_lno+i].len;
+
+ if (!fuzzy_matchlines(img->buf + try + imgoff, imglen,
+ preimage->buf + preoff, prelen))
+ return 0;
+ if (preimage->line[i].flag & LINE_COMMON)
+ postlen += imglen - prelen;
+ imgoff += imglen;
+ preoff += prelen;
+ }
+
+ /*
+ * Ok, the preimage matches with whitespace fuzz.
+ *
+ * imgoff now holds the true length of the target that
+ * matches the preimage before the end of the file.
+ *
+ * Count the number of characters in the preimage that fall
+ * beyond the end of the file and make sure that all of them
+ * are whitespace characters. (This can only happen if
+ * we are removing blank lines at the end of the file.)
+ */
+ buf = preimage_eof = preimage->buf + preoff;
+ for ( ; i < preimage->nr; i++)
+ preoff += preimage->line[i].len;
+ preimage_end = preimage->buf + preoff;
+ for ( ; buf < preimage_end; buf++)
+ if (!isspace(*buf))
+ return 0;
+
+ /*
+ * Update the preimage and the common postimage context
+ * lines to use the same whitespace as the target.
+ * If whitespace is missing in the target (i.e.
+ * if the preimage extends beyond the end of the file),
+ * use the whitespace from the preimage.
+ */
+ extra_chars = preimage_end - preimage_eof;
+ strbuf_init(&fixed, imgoff + extra_chars);
+ strbuf_add(&fixed, img->buf + try, imgoff);
+ strbuf_add(&fixed, preimage_eof, extra_chars);
+ fixed_buf = strbuf_detach(&fixed, &fixed_len);
+ update_pre_post_images(preimage, postimage,
+ fixed_buf, fixed_len, postlen);
+ return 1;
+}
+
+static int match_fragment(struct apply_state *state,
+ struct image *img,
+ struct image *preimage,
+ struct image *postimage,
+ unsigned long try,
+ int try_lno,
+ unsigned ws_rule,
+ int match_beginning, int match_end)
+{
+ int i;
+ char *fixed_buf, *buf, *orig, *target;
+ struct strbuf fixed;
+ size_t fixed_len, postlen;
+ int preimage_limit;
+
+ if (preimage->nr + try_lno <= img->nr) {
+ /*
+ * The hunk falls within the boundaries of img.
+ */
+ preimage_limit = preimage->nr;
+ if (match_end && (preimage->nr + try_lno != img->nr))
+ return 0;
+ } else if (state->ws_error_action == correct_ws_error &&
+ (ws_rule & WS_BLANK_AT_EOF)) {
+ /*
+ * This hunk extends beyond the end of img, and we are
+ * removing blank lines at the end of the file. This
+ * many lines from the beginning of the preimage must
+ * match with img, and the remainder of the preimage
+ * must be blank.
+ */
+ preimage_limit = img->nr - try_lno;
+ } else {
+ /*
+ * The hunk extends beyond the end of the img and
+ * we are not removing blanks at the end, so we
+ * should reject the hunk at this position.
+ */
+ return 0;
+ }
+
+ if (match_beginning && try_lno)
+ return 0;
+
+ /* Quick hash check */
+ for (i = 0; i < preimage_limit; i++)
+ if ((img->line[try_lno + i].flag & LINE_PATCHED) ||
+ (preimage->line[i].hash != img->line[try_lno + i].hash))
+ return 0;
+
+ if (preimage_limit == preimage->nr) {
+ /*
+ * Do we have an exact match? If we were told to match
+ * at the end, size must be exactly at try+fragsize,
+ * otherwise try+fragsize must be still within the preimage,
+ * and either case, the old piece should match the preimage
+ * exactly.
+ */
+ if ((match_end
+ ? (try + preimage->len == img->len)
+ : (try + preimage->len <= img->len)) &&
+ !memcmp(img->buf + try, preimage->buf, preimage->len))
+ return 1;
+ } else {
+ /*
+ * The preimage extends beyond the end of img, so
+ * there cannot be an exact match.
+ *
+ * There must be one non-blank context line that match
+ * a line before the end of img.
+ */
+ char *buf_end;
+
+ buf = preimage->buf;
+ buf_end = buf;
+ for (i = 0; i < preimage_limit; i++)
+ buf_end += preimage->line[i].len;
+
+ for ( ; buf < buf_end; buf++)
+ if (!isspace(*buf))
+ break;
+ if (buf == buf_end)
+ return 0;
+ }
+
+ /*
+ * No exact match. If we are ignoring whitespace, run a line-by-line
+ * fuzzy matching. We collect all the line length information because
+ * we need it to adjust whitespace if we match.
+ */
+ if (state->ws_ignore_action == ignore_ws_change)
+ return line_by_line_fuzzy_match(img, preimage, postimage,
+ try, try_lno, preimage_limit);
+
+ if (state->ws_error_action != correct_ws_error)
+ return 0;
+
+ /*
+ * The hunk does not apply byte-by-byte, but the hash says
+ * it might with whitespace fuzz. We weren't asked to
+ * ignore whitespace, we were asked to correct whitespace
+ * errors, so let's try matching after whitespace correction.
+ *
+ * While checking the preimage against the target, whitespace
+ * errors in both fixed, we count how large the corresponding
+ * postimage needs to be. The postimage prepared by
+ * apply_one_fragment() has whitespace errors fixed on added
+ * lines already, but the common lines were propagated as-is,
+ * which may become longer when their whitespace errors are
+ * fixed.
+ */
+
+ /* First count added lines in postimage */
+ postlen = 0;
+ for (i = 0; i < postimage->nr; i++) {
+ if (!(postimage->line[i].flag & LINE_COMMON))
+ postlen += postimage->line[i].len;
+ }
+
+ /*
+ * The preimage may extend beyond the end of the file,
+ * but in this loop we will only handle the part of the
+ * preimage that falls within the file.
+ */
+ strbuf_init(&fixed, preimage->len + 1);
+ orig = preimage->buf;
+ target = img->buf + try;
+ for (i = 0; i < preimage_limit; i++) {
+ size_t oldlen = preimage->line[i].len;
+ size_t tgtlen = img->line[try_lno + i].len;
+ size_t fixstart = fixed.len;
+ struct strbuf tgtfix;
+ int match;
+
+ /* Try fixing the line in the preimage */
+ ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
+
+ /* Try fixing the line in the target */
+ strbuf_init(&tgtfix, tgtlen);
+ ws_fix_copy(&tgtfix, target, tgtlen, ws_rule, NULL);
+
+ /*
+ * If they match, either the preimage was based on
+ * a version before our tree fixed whitespace breakage,
+ * or we are lacking a whitespace-fix patch the tree
+ * the preimage was based on already had (i.e. target
+ * has whitespace breakage, the preimage doesn't).
+ * In either case, we are fixing the whitespace breakages
+ * so we might as well take the fix together with their
+ * real change.
+ */
+ match = (tgtfix.len == fixed.len - fixstart &&
+ !memcmp(tgtfix.buf, fixed.buf + fixstart,
+ fixed.len - fixstart));
+
+ /* Add the length if this is common with the postimage */
+ if (preimage->line[i].flag & LINE_COMMON)
+ postlen += tgtfix.len;
+
+ strbuf_release(&tgtfix);
+ if (!match)
+ goto unmatch_exit;
+
+ orig += oldlen;
+ target += tgtlen;
+ }
+
+
+ /*
+ * Now handle the lines in the preimage that falls beyond the
+ * end of the file (if any). They will only match if they are
+ * empty or only contain whitespace (if WS_BLANK_AT_EOL is
+ * false).
+ */
+ for ( ; i < preimage->nr; i++) {
+ size_t fixstart = fixed.len; /* start of the fixed preimage */
+ size_t oldlen = preimage->line[i].len;
+ int j;
+
+ /* Try fixing the line in the preimage */
+ ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
+
+ for (j = fixstart; j < fixed.len; j++)
+ if (!isspace(fixed.buf[j]))
+ goto unmatch_exit;
+
+ orig += oldlen;
+ }
+
+ /*
+ * Yes, the preimage is based on an older version that still
+ * has whitespace breakages unfixed, and fixing them makes the
+ * hunk match. Update the context lines in the postimage.
+ */
+ fixed_buf = strbuf_detach(&fixed, &fixed_len);
+ if (postlen < postimage->len)
+ postlen = 0;
+ update_pre_post_images(preimage, postimage,
+ fixed_buf, fixed_len, postlen);
+ return 1;
+
+ unmatch_exit:
+ strbuf_release(&fixed);
+ return 0;
+}
+
+static int find_pos(struct apply_state *state,
+ struct image *img,
+ struct image *preimage,
+ struct image *postimage,
+ int line,
+ unsigned ws_rule,
+ int match_beginning, int match_end)
+{
+ int i;
+ unsigned long backwards, forwards, try;
+ int backwards_lno, forwards_lno, try_lno;
+
+ /*
+ * If match_beginning or match_end is specified, there is no
+ * point starting from a wrong line that will never match and
+ * wander around and wait for a match at the specified end.
+ */
+ if (match_beginning)
+ line = 0;
+ else if (match_end)
+ line = img->nr - preimage->nr;
+
+ /*
+ * Because the comparison is unsigned, the following test
+ * will also take care of a negative line number that can
+ * result when match_end and preimage is larger than the target.
+ */
+ if ((size_t) line > img->nr)
+ line = img->nr;
+
+ try = 0;
+ for (i = 0; i < line; i++)
+ try += img->line[i].len;
+
+ /*
+ * There's probably some smart way to do this, but I'll leave
+ * that to the smart and beautiful people. I'm simple and stupid.
+ */
+ backwards = try;
+ backwards_lno = line;
+ forwards = try;
+ forwards_lno = line;
+ try_lno = line;
+
+ for (i = 0; ; i++) {
+ if (match_fragment(state, img, preimage, postimage,
+ try, try_lno, ws_rule,
+ match_beginning, match_end))
+ return try_lno;
+
+ again:
+ if (backwards_lno == 0 && forwards_lno == img->nr)
+ break;
+
+ if (i & 1) {
+ if (backwards_lno == 0) {
+ i++;
+ goto again;
+ }
+ backwards_lno--;
+ backwards -= img->line[backwards_lno].len;
+ try = backwards;
+ try_lno = backwards_lno;
+ } else {
+ if (forwards_lno == img->nr) {
+ i++;
+ goto again;
+ }
+ forwards += img->line[forwards_lno].len;
+ forwards_lno++;
+ try = forwards;
+ try_lno = forwards_lno;
+ }
+
+ }
+ return -1;
+}
+
+static void remove_first_line(struct image *img)
+{
+ img->buf += img->line[0].len;
+ img->len -= img->line[0].len;
+ img->line++;
+ img->nr--;
+}
+
+static void remove_last_line(struct image *img)
+{
+ img->len -= img->line[--img->nr].len;
+}
+
+/*
+ * The change from "preimage" and "postimage" has been found to
+ * apply at applied_pos (counts in line numbers) in "img".
+ * Update "img" to remove "preimage" and replace it with "postimage".
+ */
+static void update_image(struct apply_state *state,
+ struct image *img,
+ int applied_pos,
+ struct image *preimage,
+ struct image *postimage)
+{
+ /*
+ * remove the copy of preimage at offset in img
+ * and replace it with postimage
+ */
+ int i, nr;
+ size_t remove_count, insert_count, applied_at = 0;
+ char *result;
+ int preimage_limit;
+
+ /*
+ * If we are removing blank lines at the end of img,
+ * the preimage may extend beyond the end.
+ * If that is the case, we must be careful only to
+ * remove the part of the preimage that falls within
+ * the boundaries of img. Initialize preimage_limit
+ * to the number of lines in the preimage that falls
+ * within the boundaries.
+ */
+ preimage_limit = preimage->nr;
+ if (preimage_limit > img->nr - applied_pos)
+ preimage_limit = img->nr - applied_pos;
+
+ for (i = 0; i < applied_pos; i++)
+ applied_at += img->line[i].len;
+
+ remove_count = 0;
+ for (i = 0; i < preimage_limit; i++)
+ remove_count += img->line[applied_pos + i].len;
+ insert_count = postimage->len;
+
+ /* Adjust the contents */
+ result = xmalloc(st_add3(st_sub(img->len, remove_count), insert_count, 1));
+ memcpy(result, img->buf, applied_at);
+ memcpy(result + applied_at, postimage->buf, postimage->len);
+ memcpy(result + applied_at + postimage->len,
+ img->buf + (applied_at + remove_count),
+ img->len - (applied_at + remove_count));
+ free(img->buf);
+ img->buf = result;
+ img->len += insert_count - remove_count;
+ result[img->len] = '\0';
+
+ /* Adjust the line table */
+ nr = img->nr + postimage->nr - preimage_limit;
+ if (preimage_limit < postimage->nr) {
+ /*
+ * NOTE: this knows that we never call remove_first_line()
+ * on anything other than pre/post image.
+ */
+ REALLOC_ARRAY(img->line, nr);
+ img->line_allocated = img->line;
+ }
+ if (preimage_limit != postimage->nr)
+ memmove(img->line + applied_pos + postimage->nr,
+ img->line + applied_pos + preimage_limit,
+ (img->nr - (applied_pos + preimage_limit)) *
+ sizeof(*img->line));
+ memcpy(img->line + applied_pos,
+ postimage->line,
+ postimage->nr * sizeof(*img->line));
+ if (!state->allow_overlap)
+ for (i = 0; i < postimage->nr; i++)
+ img->line[applied_pos + i].flag |= LINE_PATCHED;
+ img->nr = nr;
+}
+
+/*
+ * Use the patch-hunk text in "frag" to prepare two images (preimage and
+ * postimage) for the hunk. Find lines that match "preimage" in "img" and
+ * replace the part of "img" with "postimage" text.
+ */
+static int apply_one_fragment(struct apply_state *state,
+ struct image *img, struct fragment *frag,
+ int inaccurate_eof, unsigned ws_rule,
+ int nth_fragment)
+{
+ int match_beginning, match_end;
+ const char *patch = frag->patch;
+ int size = frag->size;
+ char *old, *oldlines;
+ struct strbuf newlines;
+ int new_blank_lines_at_end = 0;
+ int found_new_blank_lines_at_end = 0;
+ int hunk_linenr = frag->linenr;
+ unsigned long leading, trailing;
+ int pos, applied_pos;
+ struct image preimage;
+ struct image postimage;
+
+ memset(&preimage, 0, sizeof(preimage));
+ memset(&postimage, 0, sizeof(postimage));
+ oldlines = xmalloc(size);
+ strbuf_init(&newlines, size);
+
+ old = oldlines;
+ while (size > 0) {
+ char first;
+ int len = linelen(patch, size);
+ int plen;
+ int added_blank_line = 0;
+ int is_blank_context = 0;
+ size_t start;
+
+ if (!len)
+ break;
+
+ /*
+ * "plen" is how much of the line we should use for
+ * the actual patch data. Normally we just remove the
+ * first character on the line, but if the line is
+ * followed by "\ No newline", then we also remove the
+ * last one (which is the newline, of course).
+ */
+ plen = len - 1;
+ if (len < size && patch[len] == '\\')
+ plen--;
+ first = *patch;
+ if (state->apply_in_reverse) {
+ if (first == '-')
+ first = '+';
+ else if (first == '+')
+ first = '-';
+ }
+
+ switch (first) {
+ case '\n':
+ /* Newer GNU diff, empty context line */
+ if (plen < 0)
+ /* ... followed by '\No newline'; nothing */
+ break;
+ *old++ = '\n';
+ strbuf_addch(&newlines, '\n');
+ add_line_info(&preimage, "\n", 1, LINE_COMMON);
+ add_line_info(&postimage, "\n", 1, LINE_COMMON);
+ is_blank_context = 1;
+ break;
+ case ' ':
+ if (plen && (ws_rule & WS_BLANK_AT_EOF) &&
+ ws_blank_line(patch + 1, plen, ws_rule))
+ is_blank_context = 1;
+ case '-':
+ memcpy(old, patch + 1, plen);
+ add_line_info(&preimage, old, plen,
+ (first == ' ' ? LINE_COMMON : 0));
+ old += plen;
+ if (first == '-')
+ break;
+ /* Fall-through for ' ' */
+ case '+':
+ /* --no-add does not add new lines */
+ if (first == '+' && state->no_add)
+ break;
+
+ start = newlines.len;
+ if (first != '+' ||
+ !state->whitespace_error ||
+ state->ws_error_action != correct_ws_error) {
+ strbuf_add(&newlines, patch + 1, plen);
+ }
+ else {
+ ws_fix_copy(&newlines, patch + 1, plen, ws_rule, &state->applied_after_fixing_ws);
+ }
+ add_line_info(&postimage, newlines.buf + start, newlines.len - start,
+ (first == '+' ? 0 : LINE_COMMON));
+ if (first == '+' &&
+ (ws_rule & WS_BLANK_AT_EOF) &&
+ ws_blank_line(patch + 1, plen, ws_rule))
+ added_blank_line = 1;
+ break;
+ case '@': case '\\':
+ /* Ignore it, we already handled it */
+ break;
+ default:
+ if (state->apply_verbosity > verbosity_normal)
+ error(_("invalid start of line: '%c'"), first);
+ applied_pos = -1;
+ goto out;
+ }
+ if (added_blank_line) {
+ if (!new_blank_lines_at_end)
+ found_new_blank_lines_at_end = hunk_linenr;
+ new_blank_lines_at_end++;
+ }
+ else if (is_blank_context)
+ ;
+ else
+ new_blank_lines_at_end = 0;
+ patch += len;
+ size -= len;
+ hunk_linenr++;
+ }
+ if (inaccurate_eof &&
+ old > oldlines && old[-1] == '\n' &&
+ newlines.len > 0 && newlines.buf[newlines.len - 1] == '\n') {
+ old--;
+ strbuf_setlen(&newlines, newlines.len - 1);
+ }
+
+ leading = frag->leading;
+ trailing = frag->trailing;
+
+ /*
+ * A hunk to change lines at the beginning would begin with
+ * @@ -1,L +N,M @@
+ * but we need to be careful. -U0 that inserts before the second
+ * line also has this pattern.
+ *
+ * And a hunk to add to an empty file would begin with
+ * @@ -0,0 +N,M @@
+ *
+ * In other words, a hunk that is (frag->oldpos <= 1) with or
+ * without leading context must match at the beginning.
+ */
+ match_beginning = (!frag->oldpos ||
+ (frag->oldpos == 1 && !state->unidiff_zero));
+
+ /*
+ * A hunk without trailing lines must match at the end.
+ * However, we simply cannot tell if a hunk must match end
+ * from the lack of trailing lines if the patch was generated
+ * with unidiff without any context.
+ */
+ match_end = !state->unidiff_zero && !trailing;
+
+ pos = frag->newpos ? (frag->newpos - 1) : 0;
+ preimage.buf = oldlines;
+ preimage.len = old - oldlines;
+ postimage.buf = newlines.buf;
+ postimage.len = newlines.len;
+ preimage.line = preimage.line_allocated;
+ postimage.line = postimage.line_allocated;
+
+ for (;;) {
+
+ applied_pos = find_pos(state, img, &preimage, &postimage, pos,
+ ws_rule, match_beginning, match_end);
+
+ if (applied_pos >= 0)
+ break;
+
+ /* Am I at my context limits? */
+ if ((leading <= state->p_context) && (trailing <= state->p_context))
+ break;
+ if (match_beginning || match_end) {
+ match_beginning = match_end = 0;
+ continue;
+ }
+
+ /*
+ * Reduce the number of context lines; reduce both
+ * leading and trailing if they are equal otherwise
+ * just reduce the larger context.
+ */
+ if (leading >= trailing) {
+ remove_first_line(&preimage);
+ remove_first_line(&postimage);
+ pos--;
+ leading--;
+ }
+ if (trailing > leading) {
+ remove_last_line(&preimage);
+ remove_last_line(&postimage);
+ trailing--;
+ }
+ }
+
+ if (applied_pos >= 0) {
+ if (new_blank_lines_at_end &&
+ preimage.nr + applied_pos >= img->nr &&
+ (ws_rule & WS_BLANK_AT_EOF) &&
+ state->ws_error_action != nowarn_ws_error) {
+ record_ws_error(state, WS_BLANK_AT_EOF, "+", 1,
+ found_new_blank_lines_at_end);
+ if (state->ws_error_action == correct_ws_error) {
+ while (new_blank_lines_at_end--)
+ remove_last_line(&postimage);
+ }
+ /*
+ * We would want to prevent write_out_results()
+ * from taking place in apply_patch() that follows
+ * the callchain led us here, which is:
+ * apply_patch->check_patch_list->check_patch->
+ * apply_data->apply_fragments->apply_one_fragment
+ */
+ if (state->ws_error_action == die_on_ws_error)
+ state->apply = 0;
+ }
+
+ if (state->apply_verbosity > verbosity_normal && applied_pos != pos) {
+ int offset = applied_pos - pos;
+ if (state->apply_in_reverse)
+ offset = 0 - offset;
+ fprintf_ln(stderr,
+ Q_("Hunk #%d succeeded at %d (offset %d line).",
+ "Hunk #%d succeeded at %d (offset %d lines).",
+ offset),
+ nth_fragment, applied_pos + 1, offset);
+ }
+
+ /*
+ * Warn if it was necessary to reduce the number
+ * of context lines.
+ */
+ if ((leading != frag->leading ||
+ trailing != frag->trailing) && state->apply_verbosity > verbosity_silent)
+ fprintf_ln(stderr, _("Context reduced to (%ld/%ld)"
+ " to apply fragment at %d"),
+ leading, trailing, applied_pos+1);
+ update_image(state, img, applied_pos, &preimage, &postimage);
+ } else {
+ if (state->apply_verbosity > verbosity_normal)
+ error(_("while searching for:\n%.*s"),
+ (int)(old - oldlines), oldlines);
+ }
+
+out:
+ free(oldlines);
+ strbuf_release(&newlines);
+ free(preimage.line_allocated);
+ free(postimage.line_allocated);
+
+ return (applied_pos < 0);
+}
+
+static int apply_binary_fragment(struct apply_state *state,
+ struct image *img,
+ struct patch *patch)
+{
+ struct fragment *fragment = patch->fragments;
+ unsigned long len;
+ void *dst;
+
+ if (!fragment)
+ return error(_("missing binary patch data for '%s'"),
+ patch->new_name ?
+ patch->new_name :
+ patch->old_name);
+
+ /* Binary patch is irreversible without the optional second hunk */
+ if (state->apply_in_reverse) {
+ if (!fragment->next)
+ return error("cannot reverse-apply a binary patch "
+ "without the reverse hunk to '%s'",
+ patch->new_name
+ ? patch->new_name : patch->old_name);
+ fragment = fragment->next;
+ }
+ switch (fragment->binary_patch_method) {
+ case BINARY_DELTA_DEFLATED:
+ dst = patch_delta(img->buf, img->len, fragment->patch,
+ fragment->size, &len);
+ if (!dst)
+ return -1;
+ clear_image(img);
+ img->buf = dst;
+ img->len = len;
+ return 0;
+ case BINARY_LITERAL_DEFLATED:
+ clear_image(img);
+ img->len = fragment->size;
+ img->buf = xmemdupz(fragment->patch, img->len);
+ return 0;
+ }
+ return -1;
+}
+
+/*
+ * Replace "img" with the result of applying the binary patch.
+ * The binary patch data itself in patch->fragment is still kept
+ * but the preimage prepared by the caller in "img" is freed here
+ * or in the helper function apply_binary_fragment() this calls.
+ */
+static int apply_binary(struct apply_state *state,
+ struct image *img,
+ struct patch *patch)
+{
+ const char *name = patch->old_name ? patch->old_name : patch->new_name;
+ unsigned char sha1[20];
+
+ /*
+ * For safety, we require patch index line to contain
+ * full 40-byte textual SHA1 for old and new, at least for now.
+ */
+ if (strlen(patch->old_sha1_prefix) != 40 ||
+ strlen(patch->new_sha1_prefix) != 40 ||
+ get_sha1_hex(patch->old_sha1_prefix, sha1) ||
+ get_sha1_hex(patch->new_sha1_prefix, sha1))
+ return error("cannot apply binary patch to '%s' "
+ "without full index line", name);
+
+ if (patch->old_name) {
+ /*
+ * See if the old one matches what the patch
+ * applies to.
+ */
+ hash_sha1_file(img->buf, img->len, blob_type, sha1);
+ if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
+ return error("the patch applies to '%s' (%s), "
+ "which does not match the "
+ "current contents.",
+ name, sha1_to_hex(sha1));
+ }
+ else {
+ /* Otherwise, the old one must be empty. */
+ if (img->len)
+ return error("the patch applies to an empty "
+ "'%s' but it is not empty", name);
+ }
+
+ get_sha1_hex(patch->new_sha1_prefix, sha1);
+ if (is_null_sha1(sha1)) {
+ clear_image(img);
+ return 0; /* deletion patch */
+ }
+
+ if (has_sha1_file(sha1)) {
+ /* We already have the postimage */
+ enum object_type type;
+ unsigned long size;
+ char *result;
+
+ result = read_sha1_file(sha1, &type, &size);
+ if (!result)
+ return error("the necessary postimage %s for "
+ "'%s' cannot be read",
+ patch->new_sha1_prefix, name);
+ clear_image(img);
+ img->buf = result;
+ img->len = size;
+ } else {
+ /*
+ * We have verified buf matches the preimage;
+ * apply the patch data to it, which is stored
+ * in the patch->fragments->{patch,size}.
+ */
+ if (apply_binary_fragment(state, img, patch))
+ return error(_("binary patch does not apply to '%s'"),
+ name);
+
+ /* verify that the result matches */
+ hash_sha1_file(img->buf, img->len, blob_type, sha1);
+ if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
+ return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
+ name, patch->new_sha1_prefix, sha1_to_hex(sha1));
+ }
+
+ return 0;
+}
+
+static int apply_fragments(struct apply_state *state, struct image *img, struct patch *patch)
+{
+ struct fragment *frag = patch->fragments;
+ const char *name = patch->old_name ? patch->old_name : patch->new_name;
+ unsigned ws_rule = patch->ws_rule;
+ unsigned inaccurate_eof = patch->inaccurate_eof;
+ int nth = 0;
+
+ if (patch->is_binary)
+ return apply_binary(state, img, patch);
+
+ while (frag) {
+ nth++;
+ if (apply_one_fragment(state, img, frag, inaccurate_eof, ws_rule, nth)) {
+ error(_("patch failed: %s:%ld"), name, frag->oldpos);
+ if (!state->apply_with_reject)
+ return -1;
+ frag->rejected = 1;
+ }
+ frag = frag->next;
+ }
+ return 0;
+}
+
+static int read_blob_object(struct strbuf *buf, const unsigned char *sha1, unsigned mode)
+{
+ if (S_ISGITLINK(mode)) {
+ strbuf_grow(buf, 100);
+ strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(sha1));
+ } else {
+ enum object_type type;
+ unsigned long sz;
+ char *result;
+
+ result = read_sha1_file(sha1, &type, &sz);
+ if (!result)
+ return -1;
+ /* XXX read_sha1_file NUL-terminates */
+ strbuf_attach(buf, result, sz, sz + 1);
+ }
+ return 0;
+}
+
+static int read_file_or_gitlink(const struct cache_entry *ce, struct strbuf *buf)
+{
+ if (!ce)
+ return 0;
+ return read_blob_object(buf, ce->sha1, ce->ce_mode);
+}
+
+static struct patch *in_fn_table(struct apply_state *state, const char *name)
+{
+ struct string_list_item *item;
+
+ if (name == NULL)
+ return NULL;
+
+ item = string_list_lookup(&state->fn_table, name);
+ if (item != NULL)
+ return (struct patch *)item->util;
+
+ return NULL;
+}
+
+/*
+ * item->util in the filename table records the status of the path.
+ * Usually it points at a patch (whose result records the contents
+ * of it after applying it), but it could be PATH_WAS_DELETED for a
+ * path that a previously applied patch has already removed, or
+ * PATH_TO_BE_DELETED for a path that a later patch would remove.
+ *
+ * The latter is needed to deal with a case where two paths A and B
+ * are swapped by first renaming A to B and then renaming B to A;
+ * moving A to B should not be prevented due to presence of B as we
+ * will remove it in a later patch.
+ */
+#define PATH_TO_BE_DELETED ((struct patch *) -2)
+#define PATH_WAS_DELETED ((struct patch *) -1)
+
+static int to_be_deleted(struct patch *patch)
+{
+ return patch == PATH_TO_BE_DELETED;
+}
+
+static int was_deleted(struct patch *patch)
+{
+ return patch == PATH_WAS_DELETED;
+}
+
+static void add_to_fn_table(struct apply_state *state, struct patch *patch)
+{
+ struct string_list_item *item;
+
+ /*
+ * Always add new_name unless patch is a deletion
+ * This should cover the cases for normal diffs,
+ * file creations and copies
+ */
+ if (patch->new_name != NULL) {
+ item = string_list_insert(&state->fn_table, patch->new_name);
+ item->util = patch;
+ }
+
+ /*
+ * store a failure on rename/deletion cases because
+ * later chunks shouldn't patch old names
+ */
+ if ((patch->new_name == NULL) || (patch->is_rename)) {
+ item = string_list_insert(&state->fn_table, patch->old_name);
+ item->util = PATH_WAS_DELETED;
+ }
+}
+
+static void prepare_fn_table(struct apply_state *state, struct patch *patch)
+{
+ /*
+ * store information about incoming file deletion
+ */
+ while (patch) {
+ if ((patch->new_name == NULL) || (patch->is_rename)) {
+ struct string_list_item *item;
+ item = string_list_insert(&state->fn_table, patch->old_name);
+ item->util = PATH_TO_BE_DELETED;
+ }
+ patch = patch->next;
+ }
+}
+
+static int checkout_target(struct index_state *istate,
+ struct cache_entry *ce, struct stat *st)
+{
+ struct checkout costate;
+
+ memset(&costate, 0, sizeof(costate));
+ costate.base_dir = "";
+ costate.refresh_cache = 1;
+ costate.istate = istate;
+ if (checkout_entry(ce, &costate, NULL) || lstat(ce->name, st))
+ return error(_("cannot checkout %s"), ce->name);
+ return 0;
+}
+
+static struct patch *previous_patch(struct apply_state *state,
+ struct patch *patch,
+ int *gone)
+{
+ struct patch *previous;
+
+ *gone = 0;
+ if (patch->is_copy || patch->is_rename)
+ return NULL; /* "git" patches do not depend on the order */
+
+ previous = in_fn_table(state, patch->old_name);
+ if (!previous)
+ return NULL;
+
+ if (to_be_deleted(previous))
+ return NULL; /* the deletion hasn't happened yet */
+
+ if (was_deleted(previous))
+ *gone = 1;
+
+ return previous;
+}
+
+static int verify_index_match(const struct cache_entry *ce, struct stat *st)
+{
+ if (S_ISGITLINK(ce->ce_mode)) {
+ if (!S_ISDIR(st->st_mode))
+ return -1;
+ return 0;
+ }
+ return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
+}
+
+#define SUBMODULE_PATCH_WITHOUT_INDEX 1
+
+static int load_patch_target(struct apply_state *state,
+ struct strbuf *buf,
+ const struct cache_entry *ce,
+ struct stat *st,
+ const char *name,
+ unsigned expected_mode)
+{
+ if (state->cached || state->check_index) {
+ if (read_file_or_gitlink(ce, buf))
+ return error(_("failed to read %s"), name);
+ } else if (name) {
+ if (S_ISGITLINK(expected_mode)) {
+ if (ce)
+ return read_file_or_gitlink(ce, buf);
+ else
+ return SUBMODULE_PATCH_WITHOUT_INDEX;
+ } else if (has_symlink_leading_path(name, strlen(name))) {
+ return error(_("reading from '%s' beyond a symbolic link"), name);
+ } else {
+ if (read_old_data(st, name, buf))
+ return error(_("failed to read %s"), name);
+ }
+ }
+ return 0;
+}
+
+/*
+ * We are about to apply "patch"; populate the "image" with the
+ * current version we have, from the working tree or from the index,
+ * depending on the situation e.g. --cached/--index. If we are
+ * applying a non-git patch that incrementally updates the tree,
+ * we read from the result of a previous diff.
+ */
+static int load_preimage(struct apply_state *state,
+ struct image *image,
+ struct patch *patch, struct stat *st,
+ const struct cache_entry *ce)
+{
+ struct strbuf buf = STRBUF_INIT;
+ size_t len;
+ char *img;
+ struct patch *previous;
+ int status;
+
+ previous = previous_patch(state, patch, &status);
+ if (status)
+ return error(_("path %s has been renamed/deleted"),
+ patch->old_name);
+ if (previous) {
+ /* We have a patched copy in memory; use that. */
+ strbuf_add(&buf, previous->result, previous->resultsize);
+ } else {
+ status = load_patch_target(state, &buf, ce, st,
+ patch->old_name, patch->old_mode);
+ if (status < 0)
+ return status;
+ else if (status == SUBMODULE_PATCH_WITHOUT_INDEX) {
+ /*
+ * There is no way to apply subproject
+ * patch without looking at the index.
+ * NEEDSWORK: shouldn't this be flagged
+ * as an error???
+ */
+ free_fragment_list(patch->fragments);
+ patch->fragments = NULL;
+ } else if (status) {
+ return error(_("failed to read %s"), patch->old_name);
+ }
+ }
+
+ img = strbuf_detach(&buf, &len);
+ prepare_image(image, img, len, !patch->is_binary);
+ return 0;
+}
+
+static int three_way_merge(struct image *image,
+ char *path,
+ const unsigned char *base,
+ const unsigned char *ours,
+ const unsigned char *theirs)
+{
+ mmfile_t base_file, our_file, their_file;
+ mmbuffer_t result = { NULL };
+ int status;
+
+ read_mmblob(&base_file, base);
+ read_mmblob(&our_file, ours);
+ read_mmblob(&their_file, theirs);
+ status = ll_merge(&result, path,
+ &base_file, "base",
+ &our_file, "ours",
+ &their_file, "theirs", NULL);
+ free(base_file.ptr);
+ free(our_file.ptr);
+ free(their_file.ptr);
+ if (status < 0 || !result.ptr) {
+ free(result.ptr);
+ return -1;
+ }
+ clear_image(image);
+ image->buf = result.ptr;
+ image->len = result.size;
+
+ return status;
+}
+
+/*
+ * When directly falling back to add/add three-way merge, we read from
+ * the current contents of the new_name. In no cases other than that
+ * this function will be called.
+ */
+static int load_current(struct apply_state *state,
+ struct image *image,
+ struct patch *patch)
+{
+ struct strbuf buf = STRBUF_INIT;
+ int status, pos;
+ size_t len;
+ char *img;
+ struct stat st;
+ struct cache_entry *ce;
+ char *name = patch->new_name;
+ unsigned mode = patch->new_mode;
+
+ if (!patch->is_new)
+ die("BUG: patch to %s is not a creation", patch->old_name);
+
+ pos = cache_name_pos(name, strlen(name));
+ if (pos < 0)
+ return error(_("%s: does not exist in index"), name);
+ ce = active_cache[pos];
+ if (lstat(name, &st)) {
+ if (errno != ENOENT)
+ return error_errno("%s", name);
+ if (checkout_target(&the_index, ce, &st))
+ return -1;
+ }
+ if (verify_index_match(ce, &st))
+ return error(_("%s: does not match index"), name);
+
+ status = load_patch_target(state, &buf, ce, &st, name, mode);
+ if (status < 0)
+ return status;
+ else if (status)
+ return -1;
+ img = strbuf_detach(&buf, &len);
+ prepare_image(image, img, len, !patch->is_binary);
+ return 0;
+}
+
+static int try_threeway(struct apply_state *state,
+ struct image *image,
+ struct patch *patch,
+ struct stat *st,
+ const struct cache_entry *ce)
+{
+ unsigned char pre_sha1[20], post_sha1[20], our_sha1[20];
+ struct strbuf buf = STRBUF_INIT;
+ size_t len;
+ int status;
+ char *img;
+ struct image tmp_image;
+
+ /* No point falling back to 3-way merge in these cases */
+ if (patch->is_delete ||
+ S_ISGITLINK(patch->old_mode) || S_ISGITLINK(patch->new_mode))
+ return -1;
+
+ /* Preimage the patch was prepared for */
+ if (patch->is_new)
+ write_sha1_file("", 0, blob_type, pre_sha1);
+ else if (get_sha1(patch->old_sha1_prefix, pre_sha1) ||
+ read_blob_object(&buf, pre_sha1, patch->old_mode))
+ return error("repository lacks the necessary blob to fall back on 3-way merge.");
+
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf(stderr, "Falling back to three-way merge...\n");
+
+ img = strbuf_detach(&buf, &len);
+ prepare_image(&tmp_image, img, len, 1);
+ /* Apply the patch to get the post image */
+ if (apply_fragments(state, &tmp_image, patch) < 0) {
+ clear_image(&tmp_image);
+ return -1;
+ }
+ /* post_sha1[] is theirs */
+ write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_sha1);
+ clear_image(&tmp_image);
+
+ /* our_sha1[] is ours */
+ if (patch->is_new) {
+ if (load_current(state, &tmp_image, patch))
+ return error("cannot read the current contents of '%s'",
+ patch->new_name);
+ } else {
+ if (load_preimage(state, &tmp_image, patch, st, ce))
+ return error("cannot read the current contents of '%s'",
+ patch->old_name);
+ }
+ write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_sha1);
+ clear_image(&tmp_image);
+
+ /* in-core three-way merge between post and our using pre as base */
+ status = three_way_merge(image, patch->new_name,
+ pre_sha1, our_sha1, post_sha1);
+ if (status < 0) {
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf(stderr,
+ "Failed to fall back on three-way merge...\n");
+ return status;
+ }
+
+ if (status) {
+ patch->conflicted_threeway = 1;
+ if (patch->is_new)
+ oidclr(&patch->threeway_stage[0]);
+ else
+ hashcpy(patch->threeway_stage[0].hash, pre_sha1);
+ hashcpy(patch->threeway_stage[1].hash, our_sha1);
+ hashcpy(patch->threeway_stage[2].hash, post_sha1);
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf(stderr,
+ "Applied patch to '%s' with conflicts.\n",
+ patch->new_name);
+ } else {
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf(stderr,
+ "Applied patch to '%s' cleanly.\n",
+ patch->new_name);
+ }
+ return 0;
+}
+
+static int apply_data(struct apply_state *state, struct patch *patch,
+ struct stat *st, const struct cache_entry *ce)
+{
+ struct image image;
+
+ if (load_preimage(state, &image, patch, st, ce) < 0)
+ return -1;
+
+ if (patch->direct_to_threeway ||
+ apply_fragments(state, &image, patch) < 0) {
+ /* Note: with --reject, apply_fragments() returns 0 */
+ if (!state->threeway || try_threeway(state, &image, patch, st, ce) < 0)
+ return -1;
+ }
+ patch->result = image.buf;
+ patch->resultsize = image.len;
+ add_to_fn_table(state, patch);
+ free(image.line_allocated);
+
+ if (0 < patch->is_delete && patch->resultsize)
+ return error(_("removal patch leaves file contents"));
+
+ return 0;
+}
+
+/*
+ * If "patch" that we are looking at modifies or deletes what we have,
+ * we would want it not to lose any local modification we have, either
+ * in the working tree or in the index.
+ *
+ * This also decides if a non-git patch is a creation patch or a
+ * modification to an existing empty file. We do not check the state
+ * of the current tree for a creation patch in this function; the caller
+ * check_patch() separately makes sure (and errors out otherwise) that
+ * the path the patch creates does not exist in the current tree.
+ */
+static int check_preimage(struct apply_state *state,
+ struct patch *patch,
+ struct cache_entry **ce,
+ struct stat *st)
+{
+ const char *old_name = patch->old_name;
+ struct patch *previous = NULL;
+ int stat_ret = 0, status;
+ unsigned st_mode = 0;
+
+ if (!old_name)
+ return 0;
+
+ assert(patch->is_new <= 0);
+ previous = previous_patch(state, patch, &status);
+
+ if (status)
+ return error(_("path %s has been renamed/deleted"), old_name);
+ if (previous) {
+ st_mode = previous->new_mode;
+ } else if (!state->cached) {
+ stat_ret = lstat(old_name, st);
+ if (stat_ret && errno != ENOENT)
+ return error_errno("%s", old_name);
+ }
+
+ if (state->check_index && !previous) {
+ int pos = cache_name_pos(old_name, strlen(old_name));
+ if (pos < 0) {
+ if (patch->is_new < 0)
+ goto is_new;
+ return error(_("%s: does not exist in index"), old_name);
+ }
+ *ce = active_cache[pos];
+ if (stat_ret < 0) {
+ if (checkout_target(&the_index, *ce, st))
+ return -1;
+ }
+ if (!state->cached && verify_index_match(*ce, st))
+ return error(_("%s: does not match index"), old_name);
+ if (state->cached)
+ st_mode = (*ce)->ce_mode;
+ } else if (stat_ret < 0) {
+ if (patch->is_new < 0)
+ goto is_new;
+ return error_errno("%s", old_name);
+ }
+
+ if (!state->cached && !previous)
+ st_mode = ce_mode_from_stat(*ce, st->st_mode);
+
+ if (patch->is_new < 0)
+ patch->is_new = 0;
+ if (!patch->old_mode)
+ patch->old_mode = st_mode;
+ if ((st_mode ^ patch->old_mode) & S_IFMT)
+ return error(_("%s: wrong type"), old_name);
+ if (st_mode != patch->old_mode)
+ warning(_("%s has type %o, expected %o"),
+ old_name, st_mode, patch->old_mode);
+ if (!patch->new_mode && !patch->is_delete)
+ patch->new_mode = st_mode;
+ return 0;
+
+ is_new:
+ patch->is_new = 1;
+ patch->is_delete = 0;
+ free(patch->old_name);
+ patch->old_name = NULL;
+ return 0;
+}
+
+
+#define EXISTS_IN_INDEX 1
+#define EXISTS_IN_WORKTREE 2
+
+static int check_to_create(struct apply_state *state,
+ const char *new_name,
+ int ok_if_exists)
+{
+ struct stat nst;
+
+ if (state->check_index &&
+ cache_name_pos(new_name, strlen(new_name)) >= 0 &&
+ !ok_if_exists)
+ return EXISTS_IN_INDEX;
+ if (state->cached)
+ return 0;
+
+ if (!lstat(new_name, &nst)) {
+ if (S_ISDIR(nst.st_mode) || ok_if_exists)
+ return 0;
+ /*
+ * A leading component of new_name might be a symlink
+ * that is going to be removed with this patch, but
+ * still pointing at somewhere that has the path.
+ * In such a case, path "new_name" does not exist as
+ * far as git is concerned.
+ */
+ if (has_symlink_leading_path(new_name, strlen(new_name)))
+ return 0;
+
+ return EXISTS_IN_WORKTREE;
+ } else if ((errno != ENOENT) && (errno != ENOTDIR)) {
+ return error_errno("%s", new_name);
+ }
+ return 0;
+}
+
+static uintptr_t register_symlink_changes(struct apply_state *state,
+ const char *path,
+ uintptr_t what)
+{
+ struct string_list_item *ent;
+
+ ent = string_list_lookup(&state->symlink_changes, path);
+ if (!ent) {
+ ent = string_list_insert(&state->symlink_changes, path);
+ ent->util = (void *)0;
+ }
+ ent->util = (void *)(what | ((uintptr_t)ent->util));
+ return (uintptr_t)ent->util;
+}
+
+static uintptr_t check_symlink_changes(struct apply_state *state, const char *path)
+{
+ struct string_list_item *ent;
+
+ ent = string_list_lookup(&state->symlink_changes, path);
+ if (!ent)
+ return 0;
+ return (uintptr_t)ent->util;
+}
+
+static void prepare_symlink_changes(struct apply_state *state, struct patch *patch)
+{
+ for ( ; patch; patch = patch->next) {
+ if ((patch->old_name && S_ISLNK(patch->old_mode)) &&
+ (patch->is_rename || patch->is_delete))
+ /* the symlink at patch->old_name is removed */
+ register_symlink_changes(state, patch->old_name, APPLY_SYMLINK_GOES_AWAY);
+
+ if (patch->new_name && S_ISLNK(patch->new_mode))
+ /* the symlink at patch->new_name is created or remains */
+ register_symlink_changes(state, patch->new_name, APPLY_SYMLINK_IN_RESULT);
+ }
+}
+
+static int path_is_beyond_symlink_1(struct apply_state *state, struct strbuf *name)
+{
+ do {
+ unsigned int change;
+
+ while (--name->len && name->buf[name->len] != '/')
+ ; /* scan backwards */
+ if (!name->len)
+ break;
+ name->buf[name->len] = '\0';
+ change = check_symlink_changes(state, name->buf);
+ if (change & APPLY_SYMLINK_IN_RESULT)
+ return 1;
+ if (change & APPLY_SYMLINK_GOES_AWAY)
+ /*
+ * This cannot be "return 0", because we may
+ * see a new one created at a higher level.
+ */
+ continue;
+
+ /* otherwise, check the preimage */
+ if (state->check_index) {
+ struct cache_entry *ce;
+
+ ce = cache_file_exists(name->buf, name->len, ignore_case);
+ if (ce && S_ISLNK(ce->ce_mode))
+ return 1;
+ } else {
+ struct stat st;
+ if (!lstat(name->buf, &st) && S_ISLNK(st.st_mode))
+ return 1;
+ }
+ } while (1);
+ return 0;
+}
+
+static int path_is_beyond_symlink(struct apply_state *state, const char *name_)
+{
+ int ret;
+ struct strbuf name = STRBUF_INIT;
+
+ assert(*name_ != '\0');
+ strbuf_addstr(&name, name_);
+ ret = path_is_beyond_symlink_1(state, &name);
+ strbuf_release(&name);
+
+ return ret;
+}
+
+static int check_unsafe_path(struct patch *patch)
+{
+ const char *old_name = NULL;
+ const char *new_name = NULL;
+ if (patch->is_delete)
+ old_name = patch->old_name;
+ else if (!patch->is_new && !patch->is_copy)
+ old_name = patch->old_name;
+ if (!patch->is_delete)
+ new_name = patch->new_name;
+
+ if (old_name && !verify_path(old_name))
+ return error(_("invalid path '%s'"), old_name);
+ if (new_name && !verify_path(new_name))
+ return error(_("invalid path '%s'"), new_name);
+ return 0;
+}
+
+/*
+ * Check and apply the patch in-core; leave the result in patch->result
+ * for the caller to write it out to the final destination.
+ */
+static int check_patch(struct apply_state *state, struct patch *patch)
+{
+ struct stat st;
+ const char *old_name = patch->old_name;
+ const char *new_name = patch->new_name;
+ const char *name = old_name ? old_name : new_name;
+ struct cache_entry *ce = NULL;
+ struct patch *tpatch;
+ int ok_if_exists;
+ int status;
+
+ patch->rejected = 1; /* we will drop this after we succeed */
+
+ status = check_preimage(state, patch, &ce, &st);
+ if (status)
+ return status;
+ old_name = patch->old_name;
+
+ /*
+ * A type-change diff is always split into a patch to delete
+ * old, immediately followed by a patch to create new (see
+ * diff.c::run_diff()); in such a case it is Ok that the entry
+ * to be deleted by the previous patch is still in the working
+ * tree and in the index.
+ *
+ * A patch to swap-rename between A and B would first rename A
+ * to B and then rename B to A. While applying the first one,
+ * the presence of B should not stop A from getting renamed to
+ * B; ask to_be_deleted() about the later rename. Removal of
+ * B and rename from A to B is handled the same way by asking
+ * was_deleted().
+ */
+ if ((tpatch = in_fn_table(state, new_name)) &&
+ (was_deleted(tpatch) || to_be_deleted(tpatch)))
+ ok_if_exists = 1;
+ else
+ ok_if_exists = 0;
+
+ if (new_name &&
+ ((0 < patch->is_new) || patch->is_rename || patch->is_copy)) {
+ int err = check_to_create(state, new_name, ok_if_exists);
+
+ if (err && state->threeway) {
+ patch->direct_to_threeway = 1;
+ } else switch (err) {
+ case 0:
+ break; /* happy */
+ case EXISTS_IN_INDEX:
+ return error(_("%s: already exists in index"), new_name);
+ break;
+ case EXISTS_IN_WORKTREE:
+ return error(_("%s: already exists in working directory"),
+ new_name);
+ default:
+ return err;
+ }
+
+ if (!patch->new_mode) {
+ if (0 < patch->is_new)
+ patch->new_mode = S_IFREG | 0644;
+ else
+ patch->new_mode = patch->old_mode;
+ }
+ }
+
+ if (new_name && old_name) {
+ int same = !strcmp(old_name, new_name);
+ if (!patch->new_mode)
+ patch->new_mode = patch->old_mode;
+ if ((patch->old_mode ^ patch->new_mode) & S_IFMT) {
+ if (same)
+ return error(_("new mode (%o) of %s does not "
+ "match old mode (%o)"),
+ patch->new_mode, new_name,
+ patch->old_mode);
+ else
+ return error(_("new mode (%o) of %s does not "
+ "match old mode (%o) of %s"),
+ patch->new_mode, new_name,
+ patch->old_mode, old_name);
+ }
+ }
+
+ if (!state->unsafe_paths && check_unsafe_path(patch))
+ return -128;
+
+ /*
+ * An attempt to read from or delete a path that is beyond a
+ * symbolic link will be prevented by load_patch_target() that
+ * is called at the beginning of apply_data() so we do not
+ * have to worry about a patch marked with "is_delete" bit
+ * here. We however need to make sure that the patch result
+ * is not deposited to a path that is beyond a symbolic link
+ * here.
+ */
+ if (!patch->is_delete && path_is_beyond_symlink(state, patch->new_name))
+ return error(_("affected file '%s' is beyond a symbolic link"),
+ patch->new_name);
+
+ if (apply_data(state, patch, &st, ce) < 0)
+ return error(_("%s: patch does not apply"), name);
+ patch->rejected = 0;
+ return 0;
+}
+
+static int check_patch_list(struct apply_state *state, struct patch *patch)
+{
+ int err = 0;
+
+ prepare_symlink_changes(state, patch);
+ prepare_fn_table(state, patch);
+ while (patch) {
+ int res;
+ if (state->apply_verbosity > verbosity_normal)
+ say_patch_name(stderr,
+ _("Checking patch %s..."), patch);
+ res = check_patch(state, patch);
+ if (res == -128)
+ return -128;
+ err |= res;
+ patch = patch->next;
+ }
+ return err;
+}
+
+static int read_apply_cache(struct apply_state *state)
+{
+ if (state->index_file)
+ return read_cache_from(state->index_file);
+ else
+ return read_cache();
+}
+
+/* This function tries to read the sha1 from the current index */
+static int get_current_sha1(struct apply_state *state, const char *path,
+ unsigned char *sha1)
+{
+ int pos;
+
+ if (read_apply_cache(state) < 0)
+ return -1;
+ pos = cache_name_pos(path, strlen(path));
+ if (pos < 0)
+ return -1;
+ hashcpy(sha1, active_cache[pos]->sha1);
+ return 0;
+}
+
+static int preimage_sha1_in_gitlink_patch(struct patch *p, unsigned char sha1[20])
+{
+ /*
+ * A usable gitlink patch has only one fragment (hunk) that looks like:
+ * @@ -1 +1 @@
+ * -Subproject commit <old sha1>
+ * +Subproject commit <new sha1>
+ * or
+ * @@ -1 +0,0 @@
+ * -Subproject commit <old sha1>
+ * for a removal patch.
+ */
+ struct fragment *hunk = p->fragments;
+ static const char heading[] = "-Subproject commit ";
+ char *preimage;
+
+ if (/* does the patch have only one hunk? */
+ hunk && !hunk->next &&
+ /* is its preimage one line? */
+ hunk->oldpos == 1 && hunk->oldlines == 1 &&
+ /* does preimage begin with the heading? */
+ (preimage = memchr(hunk->patch, '\n', hunk->size)) != NULL &&
+ starts_with(++preimage, heading) &&
+ /* does it record full SHA-1? */
+ !get_sha1_hex(preimage + sizeof(heading) - 1, sha1) &&
+ preimage[sizeof(heading) + 40 - 1] == '\n' &&
+ /* does the abbreviated name on the index line agree with it? */
+ starts_with(preimage + sizeof(heading) - 1, p->old_sha1_prefix))
+ return 0; /* it all looks fine */
+
+ /* we may have full object name on the index line */
+ return get_sha1_hex(p->old_sha1_prefix, sha1);
+}
+
+/* Build an index that contains the just the files needed for a 3way merge */
+static int build_fake_ancestor(struct apply_state *state, struct patch *list)
+{
+ struct patch *patch;
+ struct index_state result = { NULL };
+ static struct lock_file lock;
+ int res;
+
+ /* Once we start supporting the reverse patch, it may be
+ * worth showing the new sha1 prefix, but until then...
+ */
+ for (patch = list; patch; patch = patch->next) {
+ unsigned char sha1[20];
+ struct cache_entry *ce;
+ const char *name;
+
+ name = patch->old_name ? patch->old_name : patch->new_name;
+ if (0 < patch->is_new)
+ continue;
+
+ if (S_ISGITLINK(patch->old_mode)) {
+ if (!preimage_sha1_in_gitlink_patch(patch, sha1))
+ ; /* ok, the textual part looks sane */
+ else
+ return error("sha1 information is lacking or "
+ "useless for submodule %s", name);
+ } else if (!get_sha1_blob(patch->old_sha1_prefix, sha1)) {
+ ; /* ok */
+ } else if (!patch->lines_added && !patch->lines_deleted) {
+ /* mode-only change: update the current */
+ if (get_current_sha1(state, patch->old_name, sha1))
+ return error("mode change for %s, which is not "
+ "in current HEAD", name);
+ } else
+ return error("sha1 information is lacking or useless "
+ "(%s).", name);
+
+ ce = make_cache_entry(patch->old_mode, sha1, name, 0, 0);
+ if (!ce)
+ return error(_("make_cache_entry failed for path '%s'"),
+ name);
+ if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD)) {
+ free(ce);
+ return error("Could not add %s to temporary index",
+ name);
+ }
+ }
+
+ hold_lock_file_for_update(&lock, state->fake_ancestor, LOCK_DIE_ON_ERROR);
+ res = write_locked_index(&result, &lock, COMMIT_LOCK);
+ discard_index(&result);
+
+ if (res)
+ return error("Could not write temporary index to %s",
+ state->fake_ancestor);
+
+ return 0;
+}
+
+static void stat_patch_list(struct apply_state *state, struct patch *patch)
+{
+ int files, adds, dels;
+
+ for (files = adds = dels = 0 ; patch ; patch = patch->next) {
+ files++;
+ adds += patch->lines_added;
+ dels += patch->lines_deleted;
+ show_stats(state, patch);
+ }
+
+ print_stat_summary(stdout, files, adds, dels);
+}
+
+static void numstat_patch_list(struct apply_state *state,
+ struct patch *patch)
+{
+ for ( ; patch; patch = patch->next) {
+ const char *name;
+ name = patch->new_name ? patch->new_name : patch->old_name;
+ if (patch->is_binary)
+ printf("-\t-\t");
+ else
+ printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
+ write_name_quoted(name, stdout, state->line_termination);
+ }
+}
+
+static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
+{
+ if (mode)
+ printf(" %s mode %06o %s\n", newdelete, mode, name);
+ else
+ printf(" %s %s\n", newdelete, name);
+}
+
+static void show_mode_change(struct patch *p, int show_name)
+{
+ if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
+ if (show_name)
+ printf(" mode change %06o => %06o %s\n",
+ p->old_mode, p->new_mode, p->new_name);
+ else
+ printf(" mode change %06o => %06o\n",
+ p->old_mode, p->new_mode);
+ }
+}
+
+static void show_rename_copy(struct patch *p)
+{
+ const char *renamecopy = p->is_rename ? "rename" : "copy";
+ const char *old, *new;
+
+ /* Find common prefix */
+ old = p->old_name;
+ new = p->new_name;
+ while (1) {
+ const char *slash_old, *slash_new;
+ slash_old = strchr(old, '/');
+ slash_new = strchr(new, '/');
+ if (!slash_old ||
+ !slash_new ||
+ slash_old - old != slash_new - new ||
+ memcmp(old, new, slash_new - new))
+ break;
+ old = slash_old + 1;
+ new = slash_new + 1;
+ }
+ /* p->old_name thru old is the common prefix, and old and new
+ * through the end of names are renames
+ */
+ if (old != p->old_name)
+ printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
+ (int)(old - p->old_name), p->old_name,
+ old, new, p->score);
+ else
+ printf(" %s %s => %s (%d%%)\n", renamecopy,
+ p->old_name, p->new_name, p->score);
+ show_mode_change(p, 0);
+}
+
+static void summary_patch_list(struct patch *patch)
+{
+ struct patch *p;
+
+ for (p = patch; p; p = p->next) {
+ if (p->is_new)
+ show_file_mode_name("create", p->new_mode, p->new_name);
+ else if (p->is_delete)
+ show_file_mode_name("delete", p->old_mode, p->old_name);
+ else {
+ if (p->is_rename || p->is_copy)
+ show_rename_copy(p);
+ else {
+ if (p->score) {
+ printf(" rewrite %s (%d%%)\n",
+ p->new_name, p->score);
+ show_mode_change(p, 0);
+ }
+ else
+ show_mode_change(p, 1);
+ }
+ }
+ }
+}
+
+static void patch_stats(struct apply_state *state, struct patch *patch)
+{
+ int lines = patch->lines_added + patch->lines_deleted;
+
+ if (lines > state->max_change)
+ state->max_change = lines;
+ if (patch->old_name) {
+ int len = quote_c_style(patch->old_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->old_name);
+ if (len > state->max_len)
+ state->max_len = len;
+ }
+ if (patch->new_name) {
+ int len = quote_c_style(patch->new_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->new_name);
+ if (len > state->max_len)
+ state->max_len = len;
+ }
+}
+
+static int remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
+{
+ if (state->update_index) {
+ if (remove_file_from_cache(patch->old_name) < 0)
+ return error(_("unable to remove %s from index"), patch->old_name);
+ }
+ if (!state->cached) {
+ if (!remove_or_warn(patch->old_mode, patch->old_name) && rmdir_empty) {
+ remove_path(patch->old_name);
+ }
+ }
+ return 0;
+}
+
+static int add_index_file(struct apply_state *state,
+ const char *path,
+ unsigned mode,
+ void *buf,
+ unsigned long size)
+{
+ struct stat st;
+ struct cache_entry *ce;
+ int namelen = strlen(path);
+ unsigned ce_size = cache_entry_size(namelen);
+
+ if (!state->update_index)
+ return 0;
+
+ ce = xcalloc(1, ce_size);
+ memcpy(ce->name, path, namelen);
+ ce->ce_mode = create_ce_mode(mode);
+ ce->ce_flags = create_ce_flags(0);
+ ce->ce_namelen = namelen;
+ if (S_ISGITLINK(mode)) {
+ const char *s;
+
+ if (!skip_prefix(buf, "Subproject commit ", &s) ||
+ get_sha1_hex(s, ce->sha1)) {
+ free(ce);
+ return error(_("corrupt patch for submodule %s"), path);
+ }
+ } else {
+ if (!state->cached) {
+ if (lstat(path, &st) < 0) {
+ free(ce);
+ return error_errno(_("unable to stat newly "
+ "created file '%s'"),
+ path);
+ }
+ fill_stat_cache_info(ce, &st);
+ }
+ if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0) {
+ free(ce);
+ return error(_("unable to create backing store "
+ "for newly created file %s"), path);
+ }
+ }
+ if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) {
+ free(ce);
+ return error(_("unable to add cache entry for %s"), path);
+ }
+
+ return 0;
+}
+
+/*
+ * Returns:
+ * -1 if an unrecoverable error happened
+ * 0 if everything went well
+ * 1 if a recoverable error happened
+ */
+static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
+{
+ int fd, res;
+ struct strbuf nbuf = STRBUF_INIT;
+
+ if (S_ISGITLINK(mode)) {
+ struct stat st;
+ if (!lstat(path, &st) && S_ISDIR(st.st_mode))
+ return 0;
+ return !!mkdir(path, 0777);
+ }
+
+ if (has_symlinks && S_ISLNK(mode))
+ /* Although buf:size is counted string, it also is NUL
+ * terminated.
+ */
+ return !!symlink(buf, path);
+
+ fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
+ if (fd < 0)
+ return 1;
+
+ if (convert_to_working_tree(path, buf, size, &nbuf)) {
+ size = nbuf.len;
+ buf = nbuf.buf;
+ }
+
+ res = write_in_full(fd, buf, size) < 0;
+ if (res)
+ error_errno(_("failed to write to '%s'"), path);
+ strbuf_release(&nbuf);
+
+ if (close(fd) < 0 && !res)
+ return error_errno(_("closing file '%s'"), path);
+
+ return res ? -1 : 0;
+}
+
+/*
+ * We optimistically assume that the directories exist,
+ * which is true 99% of the time anyway. If they don't,
+ * we create them and try again.
+ *
+ * Returns:
+ * -1 on error
+ * 0 otherwise
+ */
+static int create_one_file(struct apply_state *state,
+ char *path,
+ unsigned mode,
+ const char *buf,
+ unsigned long size)
+{
+ int res;
+
+ if (state->cached)
+ return 0;
+
+ res = try_create_file(path, mode, buf, size);
+ if (res < 0)
+ return -1;
+ if (!res)
+ return 0;
+
+ if (errno == ENOENT) {
+ if (safe_create_leading_directories(path))
+ return 0;
+ res = try_create_file(path, mode, buf, size);
+ if (res < 0)
+ return -1;
+ if (!res)
+ return 0;
+ }
+
+ if (errno == EEXIST || errno == EACCES) {
+ /* We may be trying to create a file where a directory
+ * used to be.
+ */
+ struct stat st;
+ if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
+ errno = EEXIST;
+ }
+
+ if (errno == EEXIST) {
+ unsigned int nr = getpid();
+
+ for (;;) {
+ char newpath[PATH_MAX];
+ mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
+ res = try_create_file(newpath, mode, buf, size);
+ if (res < 0)
+ return -1;
+ if (!res) {
+ if (!rename(newpath, path))
+ return 0;
+ unlink_or_warn(newpath);
+ break;
+ }
+ if (errno != EEXIST)
+ break;
+ ++nr;
+ }
+ }
+ return error_errno(_("unable to write file '%s' mode %o"),
+ path, mode);
+}
+
+static int add_conflicted_stages_file(struct apply_state *state,
+ struct patch *patch)
+{
+ int stage, namelen;
+ unsigned ce_size, mode;
+ struct cache_entry *ce;
+
+ if (!state->update_index)
+ return 0;
+ namelen = strlen(patch->new_name);
+ ce_size = cache_entry_size(namelen);
+ mode = patch->new_mode ? patch->new_mode : (S_IFREG | 0644);
+
+ remove_file_from_cache(patch->new_name);
+ for (stage = 1; stage < 4; stage++) {
+ if (is_null_oid(&patch->threeway_stage[stage - 1]))
+ continue;
+ ce = xcalloc(1, ce_size);
+ memcpy(ce->name, patch->new_name, namelen);
+ ce->ce_mode = create_ce_mode(mode);
+ ce->ce_flags = create_ce_flags(stage);
+ ce->ce_namelen = namelen;
+ hashcpy(ce->sha1, patch->threeway_stage[stage - 1].hash);
+ if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) {
+ free(ce);
+ return error(_("unable to add cache entry for %s"),
+ patch->new_name);
+ }
+ }
+
+ return 0;
+}
+
+static int create_file(struct apply_state *state, struct patch *patch)
+{
+ char *path = patch->new_name;
+ unsigned mode = patch->new_mode;
+ unsigned long size = patch->resultsize;
+ char *buf = patch->result;
+
+ if (!mode)
+ mode = S_IFREG | 0644;
+ if (create_one_file(state, path, mode, buf, size))
+ return -1;
+
+ if (patch->conflicted_threeway)
+ return add_conflicted_stages_file(state, patch);
+ else
+ return add_index_file(state, path, mode, buf, size);
+}
+
+/* phase zero is to remove, phase one is to create */
+static int write_out_one_result(struct apply_state *state,
+ struct patch *patch,
+ int phase)
+{
+ if (patch->is_delete > 0) {
+ if (phase == 0)
+ return remove_file(state, patch, 1);
+ return 0;
+ }
+ if (patch->is_new > 0 || patch->is_copy) {
+ if (phase == 1)
+ return create_file(state, patch);
+ return 0;
+ }
+ /*
+ * Rename or modification boils down to the same
+ * thing: remove the old, write the new
+ */
+ if (phase == 0)
+ return remove_file(state, patch, patch->is_rename);
+ if (phase == 1)
+ return create_file(state, patch);
+ return 0;
+}
+
+static int write_out_one_reject(struct apply_state *state, struct patch *patch)
+{
+ FILE *rej;
+ char namebuf[PATH_MAX];
+ struct fragment *frag;
+ int cnt = 0;
+ struct strbuf sb = STRBUF_INIT;
+
+ for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
+ if (!frag->rejected)
+ continue;
+ cnt++;
+ }
+
+ if (!cnt) {
+ if (state->apply_verbosity > verbosity_normal)
+ say_patch_name(stderr,
+ _("Applied patch %s cleanly."), patch);
+ return 0;
+ }
+
+ /* This should not happen, because a removal patch that leaves
+ * contents are marked "rejected" at the patch level.
+ */
+ if (!patch->new_name)
+ die(_("internal error"));
+
+ /* Say this even without --verbose */
+ strbuf_addf(&sb, Q_("Applying patch %%s with %d reject...",
+ "Applying patch %%s with %d rejects...",
+ cnt),
+ cnt);
+ if (state->apply_verbosity > verbosity_silent)
+ say_patch_name(stderr, sb.buf, patch);
+ strbuf_release(&sb);
+
+ cnt = strlen(patch->new_name);
+ if (ARRAY_SIZE(namebuf) <= cnt + 5) {
+ cnt = ARRAY_SIZE(namebuf) - 5;
+ warning(_("truncating .rej filename to %.*s.rej"),
+ cnt - 1, patch->new_name);
+ }
+ memcpy(namebuf, patch->new_name, cnt);
+ memcpy(namebuf + cnt, ".rej", 5);
+
+ rej = fopen(namebuf, "w");
+ if (!rej)
+ return error_errno(_("cannot open %s"), namebuf);
+
+ /* Normal git tools never deal with .rej, so do not pretend
+ * this is a git patch by saying --git or giving extended
+ * headers. While at it, maybe please "kompare" that wants
+ * the trailing TAB and some garbage at the end of line ;-).
+ */
+ fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
+ patch->new_name, patch->new_name);
+ for (cnt = 1, frag = patch->fragments;
+ frag;
+ cnt++, frag = frag->next) {
+ if (!frag->rejected) {
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf_ln(stderr, _("Hunk #%d applied cleanly."), cnt);
+ continue;
+ }
+ if (state->apply_verbosity > verbosity_silent)
+ fprintf_ln(stderr, _("Rejected hunk #%d."), cnt);
+ fprintf(rej, "%.*s", frag->size, frag->patch);
+ if (frag->patch[frag->size-1] != '\n')
+ fputc('\n', rej);
+ }
+ fclose(rej);
+ return -1;
+}
+
+/*
+ * Returns:
+ * -1 if an error happened
+ * 0 if the patch applied cleanly
+ * 1 if the patch did not apply cleanly
+ */
+static int write_out_results(struct apply_state *state, struct patch *list)
+{
+ int phase;
+ int errs = 0;
+ struct patch *l;
+ struct string_list cpath = STRING_LIST_INIT_DUP;
+
+ for (phase = 0; phase < 2; phase++) {
+ l = list;
+ while (l) {
+ if (l->rejected)
+ errs = 1;
+ else {
+ if (write_out_one_result(state, l, phase)) {
+ string_list_clear(&cpath, 0);
+ return -1;
+ }
+ if (phase == 1) {
+ if (write_out_one_reject(state, l))
+ errs = 1;
+ if (l->conflicted_threeway) {
+ string_list_append(&cpath, l->new_name);
+ errs = 1;
+ }
+ }
+ }
+ l = l->next;
+ }
+ }
+
+ if (cpath.nr) {
+ struct string_list_item *item;
+
+ string_list_sort(&cpath);
+ if (state->apply_verbosity > verbosity_silent) {
+ for_each_string_list_item(item, &cpath)
+ fprintf(stderr, "U %s\n", item->string);
+ }
+ string_list_clear(&cpath, 0);
+
+ rerere(0);
+ }
+
+ return errs;
+}
+
+/*
+ * Try to apply a patch.
+ *
+ * Returns:
+ * -128 if a bad error happened (like patch unreadable)
+ * -1 if patch did not apply and user cannot deal with it
+ * 0 if the patch applied
+ * 1 if the patch did not apply but user might fix it
+ */
+static int apply_patch(struct apply_state *state,
+ int fd,
+ const char *filename,
+ int options)
+{
+ size_t offset;
+ struct strbuf buf = STRBUF_INIT; /* owns the patch text */
+ struct patch *list = NULL, **listp = &list;
+ int skipped_patch = 0;
+ int res = 0;
+
+ state->patch_input_file = filename;
+ if (read_patch_file(&buf, fd) < 0)
+ return -128;
+ offset = 0;
+ while (offset < buf.len) {
+ struct patch *patch;
+ int nr;
+
+ patch = xcalloc(1, sizeof(*patch));
+ patch->inaccurate_eof = !!(options & APPLY_OPT_INACCURATE_EOF);
+ patch->recount = !!(options & APPLY_OPT_RECOUNT);
+ nr = parse_chunk(state, buf.buf + offset, buf.len - offset, patch);
+ if (nr < 0) {
+ free_patch(patch);
+ if (nr == -128) {
+ res = -128;
+ goto end;
+ }
+ break;
+ }
+ if (state->apply_in_reverse)
+ reverse_patches(patch);
+ if (use_patch(state, patch)) {
+ patch_stats(state, patch);
+ *listp = patch;
+ listp = &patch->next;
+ }
+ else {
+ if (state->apply_verbosity > verbosity_normal)
+ say_patch_name(stderr, _("Skipped patch '%s'."), patch);
+ free_patch(patch);
+ skipped_patch++;
+ }
+ offset += nr;
+ }
+
+ if (!list && !skipped_patch) {
+ error(_("unrecognized input"));
+ res = -128;
+ goto end;
+ }
+
+ if (state->whitespace_error && (state->ws_error_action == die_on_ws_error))
+ state->apply = 0;
+
+ state->update_index = state->check_index && state->apply;
+ if (state->update_index && state->newfd < 0) {
+ if (state->index_file)
+ state->newfd = hold_lock_file_for_update(state->lock_file,
+ state->index_file,
+ LOCK_DIE_ON_ERROR);
+ else
+ state->newfd = hold_locked_index(state->lock_file, 1);
+ }
+
+ if (state->check_index && read_apply_cache(state) < 0) {
+ error(_("unable to read index file"));
+ res = -128;
+ goto end;
+ }
+
+ if (state->check || state->apply) {
+ int r = check_patch_list(state, list);
+ if (r == -128) {
+ res = -128;
+ goto end;
+ }
+ if (r < 0 && !state->apply_with_reject) {
+ res = -1;
+ goto end;
+ }
+ }
+
+ if (state->apply) {
+ int write_res = write_out_results(state, list);
+ if (write_res < 0) {
+ res = -128;
+ goto end;
+ }
+ if (write_res > 0) {
+ /* with --3way, we still need to write the index out */
+ res = state->apply_with_reject ? -1 : 1;
+ goto end;
+ }
+ }
+
+ if (state->fake_ancestor &&
+ build_fake_ancestor(state, list)) {
+ res = -128;
+ goto end;
+ }
+
+ if (state->diffstat && state->apply_verbosity > verbosity_silent)
+ stat_patch_list(state, list);
+
+ if (state->numstat && state->apply_verbosity > verbosity_silent)
+ numstat_patch_list(state, list);
+
+ if (state->summary && state->apply_verbosity > verbosity_silent)
+ summary_patch_list(list);
+
+end:
+ free_patch_list(list);
+ strbuf_release(&buf);
+ string_list_clear(&state->fn_table, 0);
+ return res;
+}
+
+static int apply_option_parse_exclude(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct apply_state *state = opt->value;
+ add_name_limit(state, arg, 1);
+ return 0;
+}
+
+static int apply_option_parse_include(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct apply_state *state = opt->value;
+ add_name_limit(state, arg, 0);
+ state->has_include = 1;
+ return 0;
+}
+
+static int apply_option_parse_p(const struct option *opt,
+ const char *arg,
+ int unset)
+{
+ struct apply_state *state = opt->value;
+ state->p_value = atoi(arg);
+ state->p_value_known = 1;
+ return 0;
+}
+
+static int apply_option_parse_space_change(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct apply_state *state = opt->value;
+ if (unset)
+ state->ws_ignore_action = ignore_ws_none;
+ else
+ state->ws_ignore_action = ignore_ws_change;
+ return 0;
+}
+
+static int apply_option_parse_whitespace(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct apply_state *state = opt->value;
+ state->whitespace_option = arg;
+ if (parse_whitespace_option(state, arg))
+ exit(1);
+ return 0;
+}
+
+static int apply_option_parse_directory(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct apply_state *state = opt->value;
+ strbuf_reset(&state->root);
+ strbuf_addstr(&state->root, arg);
+ strbuf_complete(&state->root, '/');
+ return 0;
+}
+
+int apply_all_patches(struct apply_state *state,
+ int argc,
+ const char **argv,
+ int options)
+{
+ int i;
+ int res;
+ int errs = 0;
+ int read_stdin = 1;
+
+ for (i = 0; i < argc; i++) {
+ const char *arg = argv[i];
+ int fd;
+
+ if (!strcmp(arg, "-")) {
+ res = apply_patch(state, 0, "<stdin>", options);
+ if (res < 0)
+ goto end;
+ errs |= res;
+ read_stdin = 0;
+ continue;
+ } else if (0 < state->prefix_length)
+ arg = prefix_filename(state->prefix,
+ state->prefix_length,
+ arg);
+
+ fd = open(arg, O_RDONLY);
+ if (fd < 0) {
+ error(_("can't open patch '%s': %s"), arg, strerror(errno));
+ res = -128;
+ goto end;
+ }
+ read_stdin = 0;
+ set_default_whitespace_mode(state);
+ res = apply_patch(state, fd, arg, options);
+ close(fd);
+ if (res < 0)
+ goto end;
+ errs |= res;
+ }
+ set_default_whitespace_mode(state);
+ if (read_stdin) {
+ res = apply_patch(state, 0, "<stdin>", options);
+ if (res < 0)
+ goto end;
+ errs |= res;
+ }
+
+ if (state->whitespace_error) {
+ if (state->squelch_whitespace_errors &&
+ state->squelch_whitespace_errors < state->whitespace_error) {
+ int squelched =
+ state->whitespace_error - state->squelch_whitespace_errors;
+ warning(Q_("squelched %d whitespace error",
+ "squelched %d whitespace errors",
+ squelched),
+ squelched);
+ }
+ if (state->ws_error_action == die_on_ws_error) {
+ error(Q_("%d line adds whitespace errors.",
+ "%d lines add whitespace errors.",
+ state->whitespace_error),
+ state->whitespace_error);
+ res = -128;
+ goto end;
+ }
+ if (state->applied_after_fixing_ws && state->apply)
+ warning("%d line%s applied after"
+ " fixing whitespace errors.",
+ state->applied_after_fixing_ws,
+ state->applied_after_fixing_ws == 1 ? "" : "s");
+ else if (state->whitespace_error)
+ warning(Q_("%d line adds whitespace errors.",
+ "%d lines add whitespace errors.",
+ state->whitespace_error),
+ state->whitespace_error);
+ }
+
+ if (state->update_index) {
+ res = write_locked_index(&the_index, state->lock_file, COMMIT_LOCK);
+ if (res) {
+ error(_("Unable to write new index file"));
+ res = -128;
+ goto end;
+ }
+ state->newfd = -1;
+ }
+
+ res = !!errs;
+
+end:
+ if (state->newfd >= 0) {
+ rollback_lock_file(state->lock_file);
+ state->newfd = -1;
+ }
+
+ if (state->apply_verbosity <= verbosity_silent) {
+ set_error_routine(state->saved_error_routine);
+ set_warn_routine(state->saved_warn_routine);
+ }
+
+ if (res > -1)
+ return res;
+ return (res == -1 ? 1 : 128);
+}
+
+int apply_parse_options(int argc, const char **argv,
+ struct apply_state *state,
+ int *force_apply, int *options,
+ const char * const *apply_usage)
+{
+ struct option builtin_apply_options[] = {
+ { OPTION_CALLBACK, 0, "exclude", state, N_("path"),
+ N_("don't apply changes matching the given path"),
+ 0, apply_option_parse_exclude },
+ { OPTION_CALLBACK, 0, "include", state, N_("path"),
+ N_("apply changes matching the given path"),
+ 0, apply_option_parse_include },
+ { OPTION_CALLBACK, 'p', NULL, state, N_("num"),
+ N_("remove <num> leading slashes from traditional diff paths"),
+ 0, apply_option_parse_p },
+ OPT_BOOL(0, "no-add", &state->no_add,
+ N_("ignore additions made by the patch")),
+ OPT_BOOL(0, "stat", &state->diffstat,
+ N_("instead of applying the patch, output diffstat for the input")),
+ OPT_NOOP_NOARG(0, "allow-binary-replacement"),
+ OPT_NOOP_NOARG(0, "binary"),
+ OPT_BOOL(0, "numstat", &state->numstat,
+ N_("show number of added and deleted lines in decimal notation")),
+ OPT_BOOL(0, "summary", &state->summary,
+ N_("instead of applying the patch, output a summary for the input")),
+ OPT_BOOL(0, "check", &state->check,
+ N_("instead of applying the patch, see if the patch is applicable")),
+ OPT_BOOL(0, "index", &state->check_index,
+ N_("make sure the patch is applicable to the current index")),
+ OPT_BOOL(0, "cached", &state->cached,
+ N_("apply a patch without touching the working tree")),
+ OPT_BOOL(0, "unsafe-paths", &state->unsafe_paths,
+ N_("accept a patch that touches outside the working area")),
+ OPT_BOOL(0, "apply", force_apply,
+ N_("also apply the patch (use with --stat/--summary/--check)")),
+ OPT_BOOL('3', "3way", &state->threeway,
+ N_( "attempt three-way merge if a patch does not apply")),
+ OPT_FILENAME(0, "build-fake-ancestor", &state->fake_ancestor,
+ N_("build a temporary index based on embedded index information")),
+ /* Think twice before adding "--nul" synonym to this */
+ OPT_SET_INT('z', NULL, &state->line_termination,
+ N_("paths are separated with NUL character"), '\0'),
+ OPT_INTEGER('C', NULL, &state->p_context,
+ N_("ensure at least <n> lines of context match")),
+ { OPTION_CALLBACK, 0, "whitespace", state, N_("action"),
+ N_("detect new or modified lines that have whitespace errors"),
+ 0, apply_option_parse_whitespace },
+ { OPTION_CALLBACK, 0, "ignore-space-change", state, NULL,
+ N_("ignore changes in whitespace when finding context"),
+ PARSE_OPT_NOARG, apply_option_parse_space_change },
+ { OPTION_CALLBACK, 0, "ignore-whitespace", state, NULL,
+ N_("ignore changes in whitespace when finding context"),
+ PARSE_OPT_NOARG, apply_option_parse_space_change },
+ OPT_BOOL('R', "reverse", &state->apply_in_reverse,
+ N_("apply the patch in reverse")),
+ OPT_BOOL(0, "unidiff-zero", &state->unidiff_zero,
+ N_("don't expect at least one line of context")),
+ OPT_BOOL(0, "reject", &state->apply_with_reject,
+ N_("leave the rejected hunks in corresponding *.rej files")),
+ OPT_BOOL(0, "allow-overlap", &state->allow_overlap,
+ N_("allow overlapping hunks")),
+ OPT__VERBOSE(&state->apply_verbosity, N_("be verbose")),
+ OPT_BIT(0, "inaccurate-eof", options,
+ N_("tolerate incorrectly detected missing new-line at the end of file"),
+ APPLY_OPT_INACCURATE_EOF),
+ OPT_BIT(0, "recount", options,
+ N_("do not trust the line counts in the hunk headers"),
+ APPLY_OPT_RECOUNT),
+ { OPTION_CALLBACK, 0, "directory", state, N_("root"),
+ N_("prepend <root> to all filenames"),
+ 0, apply_option_parse_directory },
+ OPT_END()
+ };
+
+ return parse_options(argc, argv, state->prefix, builtin_apply_options, apply_usage, 0);
+}
diff --git a/apply.h b/apply.h
new file mode 100644
index 0000000000..b3d6783d55
--- /dev/null
+++ b/apply.h
@@ -0,0 +1,137 @@
+#ifndef APPLY_H
+#define APPLY_H
+
+enum apply_ws_error_action {
+ nowarn_ws_error,
+ warn_on_ws_error,
+ die_on_ws_error,
+ correct_ws_error
+};
+
+enum apply_ws_ignore {
+ ignore_ws_none,
+ ignore_ws_change
+};
+
+enum apply_verbosity {
+ verbosity_silent = -1,
+ verbosity_normal = 0,
+ verbosity_verbose = 1
+};
+
+/*
+ * We need to keep track of how symlinks in the preimage are
+ * manipulated by the patches. A patch to add a/b/c where a/b
+ * is a symlink should not be allowed to affect the directory
+ * the symlink points at, but if the same patch removes a/b,
+ * it is perfectly fine, as the patch removes a/b to make room
+ * to create a directory a/b so that a/b/c can be created.
+ *
+ * See also "struct string_list symlink_changes" in "struct
+ * apply_state".
+ */
+#define APPLY_SYMLINK_GOES_AWAY 01
+#define APPLY_SYMLINK_IN_RESULT 02
+
+struct apply_state {
+ const char *prefix;
+ int prefix_length;
+
+ /* These are lock_file related */
+ struct lock_file *lock_file;
+ int newfd;
+
+ /* These control what gets looked at and modified */
+ int apply; /* this is not a dry-run */
+ int cached; /* apply to the index only */
+ int check; /* preimage must match working tree, don't actually apply */
+ int check_index; /* preimage must match the indexed version */
+ int update_index; /* check_index && apply */
+
+ /* These control cosmetic aspect of the output */
+ int diffstat; /* just show a diffstat, and don't actually apply */
+ int numstat; /* just show a numeric diffstat, and don't actually apply */
+ int summary; /* just report creation, deletion, etc, and don't actually apply */
+
+ /* These boolean parameters control how the apply is done */
+ int allow_overlap;
+ int apply_in_reverse;
+ int apply_with_reject;
+ int no_add;
+ int threeway;
+ int unidiff_zero;
+ int unsafe_paths;
+
+ /* Other non boolean parameters */
+ const char *index_file;
+ enum apply_verbosity apply_verbosity;
+ const char *fake_ancestor;
+ const char *patch_input_file;
+ int line_termination;
+ struct strbuf root;
+ int p_value;
+ int p_value_known;
+ unsigned int p_context;
+
+ /* Exclude and include path parameters */
+ struct string_list limit_by_name;
+ int has_include;
+
+ /* Various "current state" */
+ int linenr; /* current line number */
+ struct string_list symlink_changes; /* we have to track symlinks */
+
+ /*
+ * For "diff-stat" like behaviour, we keep track of the biggest change
+ * we've seen, and the longest filename. That allows us to do simple
+ * scaling.
+ */
+ int max_change;
+ int max_len;
+
+ /*
+ * Records filenames that have been touched, in order to handle
+ * the case where more than one patches touch the same file.
+ */
+ struct string_list fn_table;
+
+ /*
+ * This is to save reporting routines before using
+ * set_error_routine() or set_warn_routine() to install muting
+ * routines when in verbosity_silent mode.
+ */
+ void (*saved_error_routine)(const char *err, va_list params);
+ void (*saved_warn_routine)(const char *warn, va_list params);
+
+ /* These control whitespace errors */
+ enum apply_ws_error_action ws_error_action;
+ enum apply_ws_ignore ws_ignore_action;
+ const char *whitespace_option;
+ int whitespace_error;
+ int squelch_whitespace_errors;
+ int applied_after_fixing_ws;
+};
+
+extern int apply_parse_options(int argc, const char **argv,
+ struct apply_state *state,
+ int *force_apply, int *options,
+ const char * const *apply_usage);
+extern int init_apply_state(struct apply_state *state,
+ const char *prefix,
+ struct lock_file *lock_file);
+extern void clear_apply_state(struct apply_state *state);
+extern int check_apply_state(struct apply_state *state, int force_apply);
+
+/*
+ * Some aspects of the apply behavior are controlled by the following
+ * bits in the "options" parameter passed to apply_all_patches().
+ */
+#define APPLY_OPT_INACCURATE_EOF (1<<0) /* accept inaccurate eof */
+#define APPLY_OPT_RECOUNT (1<<1) /* accept inaccurate line count */
+
+extern int apply_all_patches(struct apply_state *state,
+ int argc,
+ const char **argv,
+ int options);
+
+#endif
diff --git a/builtin/am.c b/builtin/am.c
index 9daeb27225..ddd23badae 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -28,6 +28,7 @@
#include "rerere.h"
#include "prompt.h"
#include "mailinfo.h"
+#include "apply.h"
#include "string-list.h"
/**
@@ -1509,39 +1510,59 @@ static int parse_mail_rebase(struct am_state *state, const char *mail)
*/
static int run_apply(const struct am_state *state, const char *index_file)
{
- struct child_process cp = CHILD_PROCESS_INIT;
-
- cp.git_cmd = 1;
-
- if (index_file)
- argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s", index_file);
+ struct argv_array apply_paths = ARGV_ARRAY_INIT;
+ struct argv_array apply_opts = ARGV_ARRAY_INIT;
+ struct apply_state apply_state;
+ int res, opts_left;
+ static struct lock_file lock_file;
+ int force_apply = 0;
+ int options = 0;
+
+ if (init_apply_state(&apply_state, NULL, &lock_file))
+ die("BUG: init_apply_state() failed");
+
+ argv_array_push(&apply_opts, "apply");
+ argv_array_pushv(&apply_opts, state->git_apply_opts.argv);
+
+ opts_left = apply_parse_options(apply_opts.argc, apply_opts.argv,
+ &apply_state, &force_apply, &options,
+ NULL);
+
+ if (opts_left != 0)
+ die("unknown option passed through to git apply");
+
+ if (index_file) {
+ apply_state.index_file = index_file;
+ apply_state.cached = 1;
+ } else
+ apply_state.check_index = 1;
/*
* If we are allowed to fall back on 3-way merge, don't give false
* errors during the initial attempt.
*/
- if (state->threeway && !index_file) {
- cp.no_stdout = 1;
- cp.no_stderr = 1;
- }
+ if (state->threeway && !index_file)
+ apply_state.apply_verbosity = verbosity_silent;
- argv_array_push(&cp.args, "apply");
+ if (check_apply_state(&apply_state, force_apply))
+ die("BUG: check_apply_state() failed");
- argv_array_pushv(&cp.args, state->git_apply_opts.argv);
+ argv_array_push(&apply_paths, am_path(state, "patch"));
- if (index_file)
- argv_array_push(&cp.args, "--cached");
- else
- argv_array_push(&cp.args, "--index");
+ res = apply_all_patches(&apply_state, apply_paths.argc, apply_paths.argv, options);
- argv_array_push(&cp.args, am_path(state, "patch"));
+ argv_array_clear(&apply_paths);
+ argv_array_clear(&apply_opts);
+ clear_apply_state(&apply_state);
- if (run_command(&cp))
- return -1;
+ if (res)
+ return res;
- /* Reload index as git-apply will have modified it. */
- discard_cache();
- read_cache_from(index_file ? index_file : get_index_file());
+ if (index_file) {
+ /* Reload index as apply_all_patches() will have modified it. */
+ discard_cache();
+ read_cache_from(index_file);
+ }
return 0;
}
diff --git a/builtin/apply.c b/builtin/apply.c
index 1a488f9e88..81b9a61c37 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -1,4793 +1,16 @@
-/*
- * apply.c
- *
- * Copyright (C) Linus Torvalds, 2005
- *
- * This applies patches on top of some (arbitrary) version of the SCM.
- *
- */
#include "cache.h"
-#include "lockfile.h"
-#include "cache-tree.h"
-#include "quote.h"
-#include "blob.h"
-#include "delta.h"
#include "builtin.h"
-#include "string-list.h"
-#include "dir.h"
-#include "diff.h"
#include "parse-options.h"
-#include "xdiff-interface.h"
-#include "ll-merge.h"
-#include "rerere.h"
-
-enum ws_error_action {
- nowarn_ws_error,
- warn_on_ws_error,
- die_on_ws_error,
- correct_ws_error
-};
-
-
-enum ws_ignore {
- ignore_ws_none,
- ignore_ws_change
-};
-
-/*
- * We need to keep track of how symlinks in the preimage are
- * manipulated by the patches. A patch to add a/b/c where a/b
- * is a symlink should not be allowed to affect the directory
- * the symlink points at, but if the same patch removes a/b,
- * it is perfectly fine, as the patch removes a/b to make room
- * to create a directory a/b so that a/b/c can be created.
- *
- * See also "struct string_list symlink_changes" in "struct
- * apply_state".
- */
-#define SYMLINK_GOES_AWAY 01
-#define SYMLINK_IN_RESULT 02
-
-struct apply_state {
- const char *prefix;
- int prefix_length;
-
- /* These are lock_file related */
- struct lock_file *lock_file;
- int newfd;
-
- /* These control what gets looked at and modified */
- int apply; /* this is not a dry-run */
- int cached; /* apply to the index only */
- int check; /* preimage must match working tree, don't actually apply */
- int check_index; /* preimage must match the indexed version */
- int update_index; /* check_index && apply */
-
- /* These control cosmetic aspect of the output */
- int diffstat; /* just show a diffstat, and don't actually apply */
- int numstat; /* just show a numeric diffstat, and don't actually apply */
- int summary; /* just report creation, deletion, etc, and don't actually apply */
-
- /* These boolean parameters control how the apply is done */
- int allow_overlap;
- int apply_in_reverse;
- int apply_with_reject;
- int apply_verbosely;
- int no_add;
- int threeway;
- int unidiff_zero;
- int unsafe_paths;
-
- /* Other non boolean parameters */
- const char *fake_ancestor;
- const char *patch_input_file;
- int line_termination;
- struct strbuf root;
- int p_value;
- int p_value_known;
- unsigned int p_context;
-
- /* Exclude and include path parameters */
- struct string_list limit_by_name;
- int has_include;
-
- /* Various "current state" */
- int linenr; /* current line number */
- struct string_list symlink_changes; /* we have to track symlinks */
-
- /*
- * For "diff-stat" like behaviour, we keep track of the biggest change
- * we've seen, and the longest filename. That allows us to do simple
- * scaling.
- */
- int max_change;
- int max_len;
-
- /*
- * Records filenames that have been touched, in order to handle
- * the case where more than one patches touch the same file.
- */
- struct string_list fn_table;
-
- /* These control whitespace errors */
- enum ws_error_action ws_error_action;
- enum ws_ignore ws_ignore_action;
- const char *whitespace_option;
- int whitespace_error;
- int squelch_whitespace_errors;
- int applied_after_fixing_ws;
-};
+#include "lockfile.h"
+#include "apply.h"
static const char * const apply_usage[] = {
N_("git apply [<options>] [<patch>...]"),
NULL
};
-static void parse_whitespace_option(struct apply_state *state, const char *option)
-{
- if (!option) {
- state->ws_error_action = warn_on_ws_error;
- return;
- }
- if (!strcmp(option, "warn")) {
- state->ws_error_action = warn_on_ws_error;
- return;
- }
- if (!strcmp(option, "nowarn")) {
- state->ws_error_action = nowarn_ws_error;
- return;
- }
- if (!strcmp(option, "error")) {
- state->ws_error_action = die_on_ws_error;
- return;
- }
- if (!strcmp(option, "error-all")) {
- state->ws_error_action = die_on_ws_error;
- state->squelch_whitespace_errors = 0;
- return;
- }
- if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
- state->ws_error_action = correct_ws_error;
- return;
- }
- die(_("unrecognized whitespace option '%s'"), option);
-}
-
-static void parse_ignorewhitespace_option(struct apply_state *state,
- const char *option)
-{
- if (!option || !strcmp(option, "no") ||
- !strcmp(option, "false") || !strcmp(option, "never") ||
- !strcmp(option, "none")) {
- state->ws_ignore_action = ignore_ws_none;
- return;
- }
- if (!strcmp(option, "change")) {
- state->ws_ignore_action = ignore_ws_change;
- return;
- }
- die(_("unrecognized whitespace ignore option '%s'"), option);
-}
-
-static void set_default_whitespace_mode(struct apply_state *state)
-{
- if (!state->whitespace_option && !apply_default_whitespace)
- state->ws_error_action = (state->apply ? warn_on_ws_error : nowarn_ws_error);
-}
-
-/*
- * This represents one "hunk" from a patch, starting with
- * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
- * patch text is pointed at by patch, and its byte length
- * is stored in size. leading and trailing are the number
- * of context lines.
- */
-struct fragment {
- unsigned long leading, trailing;
- unsigned long oldpos, oldlines;
- unsigned long newpos, newlines;
- /*
- * 'patch' is usually borrowed from buf in apply_patch(),
- * but some codepaths store an allocated buffer.
- */
- const char *patch;
- unsigned free_patch:1,
- rejected:1;
- int size;
- int linenr;
- struct fragment *next;
-};
-
-/*
- * When dealing with a binary patch, we reuse "leading" field
- * to store the type of the binary hunk, either deflated "delta"
- * or deflated "literal".
- */
-#define binary_patch_method leading
-#define BINARY_DELTA_DEFLATED 1
-#define BINARY_LITERAL_DEFLATED 2
-
-/*
- * This represents a "patch" to a file, both metainfo changes
- * such as creation/deletion, filemode and content changes represented
- * as a series of fragments.
- */
-struct patch {
- char *new_name, *old_name, *def_name;
- unsigned int old_mode, new_mode;
- int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
- int rejected;
- unsigned ws_rule;
- int lines_added, lines_deleted;
- int score;
- unsigned int is_toplevel_relative:1;
- unsigned int inaccurate_eof:1;
- unsigned int is_binary:1;
- unsigned int is_copy:1;
- unsigned int is_rename:1;
- unsigned int recount:1;
- unsigned int conflicted_threeway:1;
- unsigned int direct_to_threeway:1;
- struct fragment *fragments;
- char *result;
- size_t resultsize;
- char old_sha1_prefix[41];
- char new_sha1_prefix[41];
- struct patch *next;
-
- /* three-way fallback result */
- struct object_id threeway_stage[3];
-};
-
-static void free_fragment_list(struct fragment *list)
-{
- while (list) {
- struct fragment *next = list->next;
- if (list->free_patch)
- free((char *)list->patch);
- free(list);
- list = next;
- }
-}
-
-static void free_patch(struct patch *patch)
-{
- free_fragment_list(patch->fragments);
- free(patch->def_name);
- free(patch->old_name);
- free(patch->new_name);
- free(patch->result);
- free(patch);
-}
-
-static void free_patch_list(struct patch *list)
-{
- while (list) {
- struct patch *next = list->next;
- free_patch(list);
- list = next;
- }
-}
-
-/*
- * A line in a file, len-bytes long (includes the terminating LF,
- * except for an incomplete line at the end if the file ends with
- * one), and its contents hashes to 'hash'.
- */
-struct line {
- size_t len;
- unsigned hash : 24;
- unsigned flag : 8;
-#define LINE_COMMON 1
-#define LINE_PATCHED 2
-};
-
-/*
- * This represents a "file", which is an array of "lines".
- */
-struct image {
- char *buf;
- size_t len;
- size_t nr;
- size_t alloc;
- struct line *line_allocated;
- struct line *line;
-};
-
-static uint32_t hash_line(const char *cp, size_t len)
-{
- size_t i;
- uint32_t h;
- for (i = 0, h = 0; i < len; i++) {
- if (!isspace(cp[i])) {
- h = h * 3 + (cp[i] & 0xff);
- }
- }
- return h;
-}
-
-/*
- * Compare lines s1 of length n1 and s2 of length n2, ignoring
- * whitespace difference. Returns 1 if they match, 0 otherwise
- */
-static int fuzzy_matchlines(const char *s1, size_t n1,
- const char *s2, size_t n2)
-{
- const char *last1 = s1 + n1 - 1;
- const char *last2 = s2 + n2 - 1;
- int result = 0;
-
- /* ignore line endings */
- while ((*last1 == '\r') || (*last1 == '\n'))
- last1--;
- while ((*last2 == '\r') || (*last2 == '\n'))
- last2--;
-
- /* skip leading whitespaces, if both begin with whitespace */
- if (s1 <= last1 && s2 <= last2 && isspace(*s1) && isspace(*s2)) {
- while (isspace(*s1) && (s1 <= last1))
- s1++;
- while (isspace(*s2) && (s2 <= last2))
- s2++;
- }
- /* early return if both lines are empty */
- if ((s1 > last1) && (s2 > last2))
- return 1;
- while (!result) {
- result = *s1++ - *s2++;
- /*
- * Skip whitespace inside. We check for whitespace on
- * both buffers because we don't want "a b" to match
- * "ab"
- */
- if (isspace(*s1) && isspace(*s2)) {
- while (isspace(*s1) && s1 <= last1)
- s1++;
- while (isspace(*s2) && s2 <= last2)
- s2++;
- }
- /*
- * If we reached the end on one side only,
- * lines don't match
- */
- if (
- ((s2 > last2) && (s1 <= last1)) ||
- ((s1 > last1) && (s2 <= last2)))
- return 0;
- if ((s1 > last1) && (s2 > last2))
- break;
- }
-
- return !result;
-}
-
-static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
-{
- ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
- img->line_allocated[img->nr].len = len;
- img->line_allocated[img->nr].hash = hash_line(bol, len);
- img->line_allocated[img->nr].flag = flag;
- img->nr++;
-}
-
-/*
- * "buf" has the file contents to be patched (read from various sources).
- * attach it to "image" and add line-based index to it.
- * "image" now owns the "buf".
- */
-static void prepare_image(struct image *image, char *buf, size_t len,
- int prepare_linetable)
-{
- const char *cp, *ep;
-
- memset(image, 0, sizeof(*image));
- image->buf = buf;
- image->len = len;
-
- if (!prepare_linetable)
- return;
-
- ep = image->buf + image->len;
- cp = image->buf;
- while (cp < ep) {
- const char *next;
- for (next = cp; next < ep && *next != '\n'; next++)
- ;
- if (next < ep)
- next++;
- add_line_info(image, cp, next - cp, 0);
- cp = next;
- }
- image->line = image->line_allocated;
-}
-
-static void clear_image(struct image *image)
-{
- free(image->buf);
- free(image->line_allocated);
- memset(image, 0, sizeof(*image));
-}
-
-/* fmt must contain _one_ %s and no other substitution */
-static void say_patch_name(FILE *output, const char *fmt, struct patch *patch)
-{
- struct strbuf sb = STRBUF_INIT;
-
- if (patch->old_name && patch->new_name &&
- strcmp(patch->old_name, patch->new_name)) {
- quote_c_style(patch->old_name, &sb, NULL, 0);
- strbuf_addstr(&sb, " => ");
- quote_c_style(patch->new_name, &sb, NULL, 0);
- } else {
- const char *n = patch->new_name;
- if (!n)
- n = patch->old_name;
- quote_c_style(n, &sb, NULL, 0);
- }
- fprintf(output, fmt, sb.buf);
- fputc('\n', output);
- strbuf_release(&sb);
-}
-
-#define SLOP (16)
-
-static void read_patch_file(struct strbuf *sb, int fd)
-{
- if (strbuf_read(sb, fd, 0) < 0)
- die_errno("git apply: failed to read");
-
- /*
- * Make sure that we have some slop in the buffer
- * so that we can do speculative "memcmp" etc, and
- * see to it that it is NUL-filled.
- */
- strbuf_grow(sb, SLOP);
- memset(sb->buf + sb->len, 0, SLOP);
-}
-
-static unsigned long linelen(const char *buffer, unsigned long size)
-{
- unsigned long len = 0;
- while (size--) {
- len++;
- if (*buffer++ == '\n')
- break;
- }
- return len;
-}
-
-static int is_dev_null(const char *str)
-{
- return skip_prefix(str, "/dev/null", &str) && isspace(*str);
-}
-
-#define TERM_SPACE 1
-#define TERM_TAB 2
-
-static int name_terminate(int c, int terminate)
-{
- if (c == ' ' && !(terminate & TERM_SPACE))
- return 0;
- if (c == '\t' && !(terminate & TERM_TAB))
- return 0;
-
- return 1;
-}
-
-/* remove double slashes to make --index work with such filenames */
-static char *squash_slash(char *name)
-{
- int i = 0, j = 0;
-
- if (!name)
- return NULL;
-
- while (name[i]) {
- if ((name[j++] = name[i++]) == '/')
- while (name[i] == '/')
- i++;
- }
- name[j] = '\0';
- return name;
-}
-
-static char *find_name_gnu(struct apply_state *state,
- const char *line,
- const char *def,
- int p_value)
-{
- struct strbuf name = STRBUF_INIT;
- char *cp;
-
- /*
- * Proposed "new-style" GNU patch/diff format; see
- * http://marc.info/?l=git&m=112927316408690&w=2
- */
- if (unquote_c_style(&name, line, NULL)) {
- strbuf_release(&name);
- return NULL;
- }
-
- for (cp = name.buf; p_value; p_value--) {
- cp = strchr(cp, '/');
- if (!cp) {
- strbuf_release(&name);
- return NULL;
- }
- cp++;
- }
-
- strbuf_remove(&name, 0, cp - name.buf);
- if (state->root.len)
- strbuf_insert(&name, 0, state->root.buf, state->root.len);
- return squash_slash(strbuf_detach(&name, NULL));
-}
-
-static size_t sane_tz_len(const char *line, size_t len)
-{
- const char *tz, *p;
-
- if (len < strlen(" +0500") || line[len-strlen(" +0500")] != ' ')
- return 0;
- tz = line + len - strlen(" +0500");
-
- if (tz[1] != '+' && tz[1] != '-')
- return 0;
-
- for (p = tz + 2; p != line + len; p++)
- if (!isdigit(*p))
- return 0;
-
- return line + len - tz;
-}
-
-static size_t tz_with_colon_len(const char *line, size_t len)
-{
- const char *tz, *p;
-
- if (len < strlen(" +08:00") || line[len - strlen(":00")] != ':')
- return 0;
- tz = line + len - strlen(" +08:00");
-
- if (tz[0] != ' ' || (tz[1] != '+' && tz[1] != '-'))
- return 0;
- p = tz + 2;
- if (!isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
- !isdigit(*p++) || !isdigit(*p++))
- return 0;
-
- return line + len - tz;
-}
-
-static size_t date_len(const char *line, size_t len)
-{
- const char *date, *p;
-
- if (len < strlen("72-02-05") || line[len-strlen("-05")] != '-')
- return 0;
- p = date = line + len - strlen("72-02-05");
-
- if (!isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
- !isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
- !isdigit(*p++) || !isdigit(*p++)) /* Not a date. */
- return 0;
-
- if (date - line >= strlen("19") &&
- isdigit(date[-1]) && isdigit(date[-2])) /* 4-digit year */
- date -= strlen("19");
-
- return line + len - date;
-}
-
-static size_t short_time_len(const char *line, size_t len)
-{
- const char *time, *p;
-
- if (len < strlen(" 07:01:32") || line[len-strlen(":32")] != ':')
- return 0;
- p = time = line + len - strlen(" 07:01:32");
-
- /* Permit 1-digit hours? */
- if (*p++ != ' ' ||
- !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
- !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
- !isdigit(*p++) || !isdigit(*p++)) /* Not a time. */
- return 0;
-
- return line + len - time;
-}
-
-static size_t fractional_time_len(const char *line, size_t len)
-{
- const char *p;
- size_t n;
-
- /* Expected format: 19:41:17.620000023 */
- if (!len || !isdigit(line[len - 1]))
- return 0;
- p = line + len - 1;
-
- /* Fractional seconds. */
- while (p > line && isdigit(*p))
- p--;
- if (*p != '.')
- return 0;
-
- /* Hours, minutes, and whole seconds. */
- n = short_time_len(line, p - line);
- if (!n)
- return 0;
-
- return line + len - p + n;
-}
-
-static size_t trailing_spaces_len(const char *line, size_t len)
-{
- const char *p;
-
- /* Expected format: ' ' x (1 or more) */
- if (!len || line[len - 1] != ' ')
- return 0;
-
- p = line + len;
- while (p != line) {
- p--;
- if (*p != ' ')
- return line + len - (p + 1);
- }
-
- /* All spaces! */
- return len;
-}
-
-static size_t diff_timestamp_len(const char *line, size_t len)
-{
- const char *end = line + len;
- size_t n;
-
- /*
- * Posix: 2010-07-05 19:41:17
- * GNU: 2010-07-05 19:41:17.620000023 -0500
- */
-
- if (!isdigit(end[-1]))
- return 0;
-
- n = sane_tz_len(line, end - line);
- if (!n)
- n = tz_with_colon_len(line, end - line);
- end -= n;
-
- n = short_time_len(line, end - line);
- if (!n)
- n = fractional_time_len(line, end - line);
- end -= n;
-
- n = date_len(line, end - line);
- if (!n) /* No date. Too bad. */
- return 0;
- end -= n;
-
- if (end == line) /* No space before date. */
- return 0;
- if (end[-1] == '\t') { /* Success! */
- end--;
- return line + len - end;
- }
- if (end[-1] != ' ') /* No space before date. */
- return 0;
-
- /* Whitespace damage. */
- end -= trailing_spaces_len(line, end - line);
- return line + len - end;
-}
-
-static char *find_name_common(struct apply_state *state,
- const char *line,
- const char *def,
- int p_value,
- const char *end,
- int terminate)
-{
- int len;
- const char *start = NULL;
-
- if (p_value == 0)
- start = line;
- while (line != end) {
- char c = *line;
-
- if (!end && isspace(c)) {
- if (c == '\n')
- break;
- if (name_terminate(c, terminate))
- break;
- }
- line++;
- if (c == '/' && !--p_value)
- start = line;
- }
- if (!start)
- return squash_slash(xstrdup_or_null(def));
- len = line - start;
- if (!len)
- return squash_slash(xstrdup_or_null(def));
-
- /*
- * Generally we prefer the shorter name, especially
- * if the other one is just a variation of that with
- * something else tacked on to the end (ie "file.orig"
- * or "file~").
- */
- if (def) {
- int deflen = strlen(def);
- if (deflen < len && !strncmp(start, def, deflen))
- return squash_slash(xstrdup(def));
- }
-
- if (state->root.len) {
- char *ret = xstrfmt("%s%.*s", state->root.buf, len, start);
- return squash_slash(ret);
- }
-
- return squash_slash(xmemdupz(start, len));
-}
-
-static char *find_name(struct apply_state *state,
- const char *line,
- char *def,
- int p_value,
- int terminate)
-{
- if (*line == '"') {
- char *name = find_name_gnu(state, line, def, p_value);
- if (name)
- return name;
- }
-
- return find_name_common(state, line, def, p_value, NULL, terminate);
-}
-
-static char *find_name_traditional(struct apply_state *state,
- const char *line,
- char *def,
- int p_value)
-{
- size_t len;
- size_t date_len;
-
- if (*line == '"') {
- char *name = find_name_gnu(state, line, def, p_value);
- if (name)
- return name;
- }
-
- len = strchrnul(line, '\n') - line;
- date_len = diff_timestamp_len(line, len);
- if (!date_len)
- return find_name_common(state, line, def, p_value, NULL, TERM_TAB);
- len -= date_len;
-
- return find_name_common(state, line, def, p_value, line + len, 0);
-}
-
-static int count_slashes(const char *cp)
-{
- int cnt = 0;
- char ch;
-
- while ((ch = *cp++))
- if (ch == '/')
- cnt++;
- return cnt;
-}
-
-/*
- * Given the string after "--- " or "+++ ", guess the appropriate
- * p_value for the given patch.
- */
-static int guess_p_value(struct apply_state *state, const char *nameline)
-{
- char *name, *cp;
- int val = -1;
-
- if (is_dev_null(nameline))
- return -1;
- name = find_name_traditional(state, nameline, NULL, 0);
- if (!name)
- return -1;
- cp = strchr(name, '/');
- if (!cp)
- val = 0;
- else if (state->prefix) {
- /*
- * Does it begin with "a/$our-prefix" and such? Then this is
- * very likely to apply to our directory.
- */
- if (!strncmp(name, state->prefix, state->prefix_length))
- val = count_slashes(state->prefix);
- else {
- cp++;
- if (!strncmp(cp, state->prefix, state->prefix_length))
- val = count_slashes(state->prefix) + 1;
- }
- }
- free(name);
- return val;
-}
-
-/*
- * Does the ---/+++ line have the POSIX timestamp after the last HT?
- * GNU diff puts epoch there to signal a creation/deletion event. Is
- * this such a timestamp?
- */
-static int has_epoch_timestamp(const char *nameline)
-{
- /*
- * We are only interested in epoch timestamp; any non-zero
- * fraction cannot be one, hence "(\.0+)?" in the regexp below.
- * For the same reason, the date must be either 1969-12-31 or
- * 1970-01-01, and the seconds part must be "00".
- */
- const char stamp_regexp[] =
- "^(1969-12-31|1970-01-01)"
- " "
- "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?"
- " "
- "([-+][0-2][0-9]:?[0-5][0-9])\n";
- const char *timestamp = NULL, *cp, *colon;
- static regex_t *stamp;
- regmatch_t m[10];
- int zoneoffset;
- int hourminute;
- int status;
-
- for (cp = nameline; *cp != '\n'; cp++) {
- if (*cp == '\t')
- timestamp = cp + 1;
- }
- if (!timestamp)
- return 0;
- if (!stamp) {
- stamp = xmalloc(sizeof(*stamp));
- if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) {
- warning(_("Cannot prepare timestamp regexp %s"),
- stamp_regexp);
- return 0;
- }
- }
-
- status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0);
- if (status) {
- if (status != REG_NOMATCH)
- warning(_("regexec returned %d for input: %s"),
- status, timestamp);
- return 0;
- }
-
- zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10);
- if (*colon == ':')
- zoneoffset = zoneoffset * 60 + strtol(colon + 1, NULL, 10);
- else
- zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100);
- if (timestamp[m[3].rm_so] == '-')
- zoneoffset = -zoneoffset;
-
- /*
- * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
- * (west of GMT) or 1970-01-01 (east of GMT)
- */
- if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) ||
- (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10)))
- return 0;
-
- hourminute = (strtol(timestamp + 11, NULL, 10) * 60 +
- strtol(timestamp + 14, NULL, 10) -
- zoneoffset);
-
- return ((zoneoffset < 0 && hourminute == 1440) ||
- (0 <= zoneoffset && !hourminute));
-}
-
-/*
- * Get the name etc info from the ---/+++ lines of a traditional patch header
- *
- * FIXME! The end-of-filename heuristics are kind of screwy. For existing
- * files, we can happily check the index for a match, but for creating a
- * new file we should try to match whatever "patch" does. I have no idea.
- */
-static void parse_traditional_patch(struct apply_state *state,
- const char *first,
- const char *second,
- struct patch *patch)
-{
- char *name;
-
- first += 4; /* skip "--- " */
- second += 4; /* skip "+++ " */
- if (!state->p_value_known) {
- int p, q;
- p = guess_p_value(state, first);
- q = guess_p_value(state, second);
- if (p < 0) p = q;
- if (0 <= p && p == q) {
- state->p_value = p;
- state->p_value_known = 1;
- }
- }
- if (is_dev_null(first)) {
- patch->is_new = 1;
- patch->is_delete = 0;
- name = find_name_traditional(state, second, NULL, state->p_value);
- patch->new_name = name;
- } else if (is_dev_null(second)) {
- patch->is_new = 0;
- patch->is_delete = 1;
- name = find_name_traditional(state, first, NULL, state->p_value);
- patch->old_name = name;
- } else {
- char *first_name;
- first_name = find_name_traditional(state, first, NULL, state->p_value);
- name = find_name_traditional(state, second, first_name, state->p_value);
- free(first_name);
- if (has_epoch_timestamp(first)) {
- patch->is_new = 1;
- patch->is_delete = 0;
- patch->new_name = name;
- } else if (has_epoch_timestamp(second)) {
- patch->is_new = 0;
- patch->is_delete = 1;
- patch->old_name = name;
- } else {
- patch->old_name = name;
- patch->new_name = xstrdup_or_null(name);
- }
- }
- if (!name)
- die(_("unable to find filename in patch at line %d"), state->linenr);
-}
-
-static int gitdiff_hdrend(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- return -1;
-}
-
-/*
- * We're anal about diff header consistency, to make
- * sure that we don't end up having strange ambiguous
- * patches floating around.
- *
- * As a result, gitdiff_{old|new}name() will check
- * their names against any previous information, just
- * to make sure..
- */
-#define DIFF_OLD_NAME 0
-#define DIFF_NEW_NAME 1
-
-static void gitdiff_verify_name(struct apply_state *state,
- const char *line,
- int isnull,
- char **name,
- int side)
-{
- if (!*name && !isnull) {
- *name = find_name(state, line, NULL, state->p_value, TERM_TAB);
- return;
- }
-
- if (*name) {
- int len = strlen(*name);
- char *another;
- if (isnull)
- die(_("git apply: bad git-diff - expected /dev/null, got %s on line %d"),
- *name, state->linenr);
- another = find_name(state, line, NULL, state->p_value, TERM_TAB);
- if (!another || memcmp(another, *name, len + 1))
- die((side == DIFF_NEW_NAME) ?
- _("git apply: bad git-diff - inconsistent new filename on line %d") :
- _("git apply: bad git-diff - inconsistent old filename on line %d"), state->linenr);
- free(another);
- } else {
- /* expect "/dev/null" */
- if (memcmp("/dev/null", line, 9) || line[9] != '\n')
- die(_("git apply: bad git-diff - expected /dev/null on line %d"), state->linenr);
- }
-}
-
-static int gitdiff_oldname(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- gitdiff_verify_name(state, line,
- patch->is_new, &patch->old_name,
- DIFF_OLD_NAME);
- return 0;
-}
-
-static int gitdiff_newname(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- gitdiff_verify_name(state, line,
- patch->is_delete, &patch->new_name,
- DIFF_NEW_NAME);
- return 0;
-}
-
-static int gitdiff_oldmode(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->old_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_newmode(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->new_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_delete(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_delete = 1;
- free(patch->old_name);
- patch->old_name = xstrdup_or_null(patch->def_name);
- return gitdiff_oldmode(state, line, patch);
-}
-
-static int gitdiff_newfile(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_new = 1;
- free(patch->new_name);
- patch->new_name = xstrdup_or_null(patch->def_name);
- return gitdiff_newmode(state, line, patch);
-}
-
-static int gitdiff_copysrc(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_copy = 1;
- free(patch->old_name);
- patch->old_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
- return 0;
-}
-
-static int gitdiff_copydst(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_copy = 1;
- free(patch->new_name);
- patch->new_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
- return 0;
-}
-
-static int gitdiff_renamesrc(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_rename = 1;
- free(patch->old_name);
- patch->old_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
- return 0;
-}
-
-static int gitdiff_renamedst(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- patch->is_rename = 1;
- free(patch->new_name);
- patch->new_name = find_name(state, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
- return 0;
-}
-
-static int gitdiff_similarity(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- unsigned long val = strtoul(line, NULL, 10);
- if (val <= 100)
- patch->score = val;
- return 0;
-}
-
-static int gitdiff_dissimilarity(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- unsigned long val = strtoul(line, NULL, 10);
- if (val <= 100)
- patch->score = val;
- return 0;
-}
-
-static int gitdiff_index(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- /*
- * index line is N hexadecimal, "..", N hexadecimal,
- * and optional space with octal mode.
- */
- const char *ptr, *eol;
- int len;
-
- ptr = strchr(line, '.');
- if (!ptr || ptr[1] != '.' || 40 < ptr - line)
- return 0;
- len = ptr - line;
- memcpy(patch->old_sha1_prefix, line, len);
- patch->old_sha1_prefix[len] = 0;
-
- line = ptr + 2;
- ptr = strchr(line, ' ');
- eol = strchrnul(line, '\n');
-
- if (!ptr || eol < ptr)
- ptr = eol;
- len = ptr - line;
-
- if (40 < len)
- return 0;
- memcpy(patch->new_sha1_prefix, line, len);
- patch->new_sha1_prefix[len] = 0;
- if (*ptr == ' ')
- patch->old_mode = strtoul(ptr+1, NULL, 8);
- return 0;
-}
-
-/*
- * This is normal for a diff that doesn't change anything: we'll fall through
- * into the next diff. Tell the parser to break out.
- */
-static int gitdiff_unrecognized(struct apply_state *state,
- const char *line,
- struct patch *patch)
-{
- return -1;
-}
-
-/*
- * Skip p_value leading components from "line"; as we do not accept
- * absolute paths, return NULL in that case.
- */
-static const char *skip_tree_prefix(struct apply_state *state,
- const char *line,
- int llen)
-{
- int nslash;
- int i;
-
- if (!state->p_value)
- return (llen && line[0] == '/') ? NULL : line;
-
- nslash = state->p_value;
- for (i = 0; i < llen; i++) {
- int ch = line[i];
- if (ch == '/' && --nslash <= 0)
- return (i == 0) ? NULL : &line[i + 1];
- }
- return NULL;
-}
-
-/*
- * This is to extract the same name that appears on "diff --git"
- * line. We do not find and return anything if it is a rename
- * patch, and it is OK because we will find the name elsewhere.
- * We need to reliably find name only when it is mode-change only,
- * creation or deletion of an empty file. In any of these cases,
- * both sides are the same name under a/ and b/ respectively.
- */
-static char *git_header_name(struct apply_state *state,
- const char *line,
- int llen)
-{
- const char *name;
- const char *second = NULL;
- size_t len, line_len;
-
- line += strlen("diff --git ");
- llen -= strlen("diff --git ");
-
- if (*line == '"') {
- const char *cp;
- struct strbuf first = STRBUF_INIT;
- struct strbuf sp = STRBUF_INIT;
-
- if (unquote_c_style(&first, line, &second))
- goto free_and_fail1;
-
- /* strip the a/b prefix including trailing slash */
- cp = skip_tree_prefix(state, first.buf, first.len);
- if (!cp)
- goto free_and_fail1;
- strbuf_remove(&first, 0, cp - first.buf);
-
- /*
- * second points at one past closing dq of name.
- * find the second name.
- */
- while ((second < line + llen) && isspace(*second))
- second++;
-
- if (line + llen <= second)
- goto free_and_fail1;
- if (*second == '"') {
- if (unquote_c_style(&sp, second, NULL))
- goto free_and_fail1;
- cp = skip_tree_prefix(state, sp.buf, sp.len);
- if (!cp)
- goto free_and_fail1;
- /* They must match, otherwise ignore */
- if (strcmp(cp, first.buf))
- goto free_and_fail1;
- strbuf_release(&sp);
- return strbuf_detach(&first, NULL);
- }
-
- /* unquoted second */
- cp = skip_tree_prefix(state, second, line + llen - second);
- if (!cp)
- goto free_and_fail1;
- if (line + llen - cp != first.len ||
- memcmp(first.buf, cp, first.len))
- goto free_and_fail1;
- return strbuf_detach(&first, NULL);
-
- free_and_fail1:
- strbuf_release(&first);
- strbuf_release(&sp);
- return NULL;
- }
-
- /* unquoted first name */
- name = skip_tree_prefix(state, line, llen);
- if (!name)
- return NULL;
-
- /*
- * since the first name is unquoted, a dq if exists must be
- * the beginning of the second name.
- */
- for (second = name; second < line + llen; second++) {
- if (*second == '"') {
- struct strbuf sp = STRBUF_INIT;
- const char *np;
-
- if (unquote_c_style(&sp, second, NULL))
- goto free_and_fail2;
-
- np = skip_tree_prefix(state, sp.buf, sp.len);
- if (!np)
- goto free_and_fail2;
-
- len = sp.buf + sp.len - np;
- if (len < second - name &&
- !strncmp(np, name, len) &&
- isspace(name[len])) {
- /* Good */
- strbuf_remove(&sp, 0, np - sp.buf);
- return strbuf_detach(&sp, NULL);
- }
-
- free_and_fail2:
- strbuf_release(&sp);
- return NULL;
- }
- }
-
- /*
- * Accept a name only if it shows up twice, exactly the same
- * form.
- */
- second = strchr(name, '\n');
- if (!second)
- return NULL;
- line_len = second - name;
- for (len = 0 ; ; len++) {
- switch (name[len]) {
- default:
- continue;
- case '\n':
- return NULL;
- case '\t': case ' ':
- /*
- * Is this the separator between the preimage
- * and the postimage pathname? Again, we are
- * only interested in the case where there is
- * no rename, as this is only to set def_name
- * and a rename patch has the names elsewhere
- * in an unambiguous form.
- */
- if (!name[len + 1])
- return NULL; /* no postimage name */
- second = skip_tree_prefix(state, name + len + 1,
- line_len - (len + 1));
- if (!second)
- return NULL;
- /*
- * Does len bytes starting at "name" and "second"
- * (that are separated by one HT or SP we just
- * found) exactly match?
- */
- if (second[len] == '\n' && !strncmp(name, second, len))
- return xmemdupz(name, len);
- }
- }
-}
-
-/* Verify that we recognize the lines following a git header */
-static int parse_git_header(struct apply_state *state,
- const char *line,
- int len,
- unsigned int size,
- struct patch *patch)
-{
- unsigned long offset;
-
- /* A git diff has explicit new/delete information, so we don't guess */
- patch->is_new = 0;
- patch->is_delete = 0;
-
- /*
- * Some things may not have the old name in the
- * rest of the headers anywhere (pure mode changes,
- * or removing or adding empty files), so we get
- * the default name from the header.
- */
- patch->def_name = git_header_name(state, line, len);
- if (patch->def_name && state->root.len) {
- char *s = xstrfmt("%s%s", state->root.buf, patch->def_name);
- free(patch->def_name);
- patch->def_name = s;
- }
-
- line += len;
- size -= len;
- state->linenr++;
- for (offset = len ; size > 0 ; offset += len, size -= len, line += len, state->linenr++) {
- static const struct opentry {
- const char *str;
- int (*fn)(struct apply_state *, const char *, struct patch *);
- } optable[] = {
- { "@@ -", gitdiff_hdrend },
- { "--- ", gitdiff_oldname },
- { "+++ ", gitdiff_newname },
- { "old mode ", gitdiff_oldmode },
- { "new mode ", gitdiff_newmode },
- { "deleted file mode ", gitdiff_delete },
- { "new file mode ", gitdiff_newfile },
- { "copy from ", gitdiff_copysrc },
- { "copy to ", gitdiff_copydst },
- { "rename old ", gitdiff_renamesrc },
- { "rename new ", gitdiff_renamedst },
- { "rename from ", gitdiff_renamesrc },
- { "rename to ", gitdiff_renamedst },
- { "similarity index ", gitdiff_similarity },
- { "dissimilarity index ", gitdiff_dissimilarity },
- { "index ", gitdiff_index },
- { "", gitdiff_unrecognized },
- };
- int i;
-
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- break;
- for (i = 0; i < ARRAY_SIZE(optable); i++) {
- const struct opentry *p = optable + i;
- int oplen = strlen(p->str);
- if (len < oplen || memcmp(p->str, line, oplen))
- continue;
- if (p->fn(state, line + oplen, patch) < 0)
- return offset;
- break;
- }
- }
-
- return offset;
-}
-
-static int parse_num(const char *line, unsigned long *p)
-{
- char *ptr;
-
- if (!isdigit(*line))
- return 0;
- *p = strtoul(line, &ptr, 10);
- return ptr - line;
-}
-
-static int parse_range(const char *line, int len, int offset, const char *expect,
- unsigned long *p1, unsigned long *p2)
-{
- int digits, ex;
-
- if (offset < 0 || offset >= len)
- return -1;
- line += offset;
- len -= offset;
-
- digits = parse_num(line, p1);
- if (!digits)
- return -1;
-
- offset += digits;
- line += digits;
- len -= digits;
-
- *p2 = 1;
- if (*line == ',') {
- digits = parse_num(line+1, p2);
- if (!digits)
- return -1;
-
- offset += digits+1;
- line += digits+1;
- len -= digits+1;
- }
-
- ex = strlen(expect);
- if (ex > len)
- return -1;
- if (memcmp(line, expect, ex))
- return -1;
-
- return offset + ex;
-}
-
-static void recount_diff(const char *line, int size, struct fragment *fragment)
-{
- int oldlines = 0, newlines = 0, ret = 0;
-
- if (size < 1) {
- warning("recount: ignore empty hunk");
- return;
- }
-
- for (;;) {
- int len = linelen(line, size);
- size -= len;
- line += len;
-
- if (size < 1)
- break;
-
- switch (*line) {
- case ' ': case '\n':
- newlines++;
- /* fall through */
- case '-':
- oldlines++;
- continue;
- case '+':
- newlines++;
- continue;
- case '\\':
- continue;
- case '@':
- ret = size < 3 || !starts_with(line, "@@ ");
- break;
- case 'd':
- ret = size < 5 || !starts_with(line, "diff ");
- break;
- default:
- ret = -1;
- break;
- }
- if (ret) {
- warning(_("recount: unexpected line: %.*s"),
- (int)linelen(line, size), line);
- return;
- }
- break;
- }
- fragment->oldlines = oldlines;
- fragment->newlines = newlines;
-}
-
-/*
- * Parse a unified diff fragment header of the
- * form "@@ -a,b +c,d @@"
- */
-static int parse_fragment_header(const char *line, int len, struct fragment *fragment)
-{
- int offset;
-
- if (!len || line[len-1] != '\n')
- return -1;
-
- /* Figure out the number of lines in a fragment */
- offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
- offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
-
- return offset;
-}
-
-static int find_header(struct apply_state *state,
- const char *line,
- unsigned long size,
- int *hdrsize,
- struct patch *patch)
-{
- unsigned long offset, len;
-
- patch->is_toplevel_relative = 0;
- patch->is_rename = patch->is_copy = 0;
- patch->is_new = patch->is_delete = -1;
- patch->old_mode = patch->new_mode = 0;
- patch->old_name = patch->new_name = NULL;
- for (offset = 0; size > 0; offset += len, size -= len, line += len, state->linenr++) {
- unsigned long nextlen;
-
- len = linelen(line, size);
- if (!len)
- break;
-
- /* Testing this early allows us to take a few shortcuts.. */
- if (len < 6)
- continue;
-
- /*
- * Make sure we don't find any unconnected patch fragments.
- * That's a sign that we didn't find a header, and that a
- * patch has become corrupted/broken up.
- */
- if (!memcmp("@@ -", line, 4)) {
- struct fragment dummy;
- if (parse_fragment_header(line, len, &dummy) < 0)
- continue;
- die(_("patch fragment without header at line %d: %.*s"),
- state->linenr, (int)len-1, line);
- }
-
- if (size < len + 6)
- break;
-
- /*
- * Git patch? It might not have a real patch, just a rename
- * or mode change, so we handle that specially
- */
- if (!memcmp("diff --git ", line, 11)) {
- int git_hdr_len = parse_git_header(state, line, len, size, patch);
- if (git_hdr_len <= len)
- continue;
- if (!patch->old_name && !patch->new_name) {
- if (!patch->def_name)
- die(Q_("git diff header lacks filename information when removing "
- "%d leading pathname component (line %d)",
- "git diff header lacks filename information when removing "
- "%d leading pathname components (line %d)",
- state->p_value),
- state->p_value, state->linenr);
- patch->old_name = xstrdup(patch->def_name);
- patch->new_name = xstrdup(patch->def_name);
- }
- if (!patch->is_delete && !patch->new_name)
- die("git diff header lacks filename information "
- "(line %d)", state->linenr);
- patch->is_toplevel_relative = 1;
- *hdrsize = git_hdr_len;
- return offset;
- }
-
- /* --- followed by +++ ? */
- if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
- continue;
-
- /*
- * We only accept unified patches, so we want it to
- * at least have "@@ -a,b +c,d @@\n", which is 14 chars
- * minimum ("@@ -0,0 +1 @@\n" is the shortest).
- */
- nextlen = linelen(line + len, size - len);
- if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
- continue;
-
- /* Ok, we'll consider it a patch */
- parse_traditional_patch(state, line, line+len, patch);
- *hdrsize = len + nextlen;
- state->linenr += 2;
- return offset;
- }
- return -1;
-}
-
-static void record_ws_error(struct apply_state *state,
- unsigned result,
- const char *line,
- int len,
- int linenr)
-{
- char *err;
-
- if (!result)
- return;
-
- state->whitespace_error++;
- if (state->squelch_whitespace_errors &&
- state->squelch_whitespace_errors < state->whitespace_error)
- return;
-
- err = whitespace_error_string(result);
- fprintf(stderr, "%s:%d: %s.\n%.*s\n",
- state->patch_input_file, linenr, err, len, line);
- free(err);
-}
-
-static void check_whitespace(struct apply_state *state,
- const char *line,
- int len,
- unsigned ws_rule)
-{
- unsigned result = ws_check(line + 1, len - 1, ws_rule);
-
- record_ws_error(state, result, line + 1, len - 2, state->linenr);
-}
-
-/*
- * Parse a unified diff. Note that this really needs to parse each
- * fragment separately, since the only way to know the difference
- * between a "---" that is part of a patch, and a "---" that starts
- * the next patch is to look at the line counts..
- */
-static int parse_fragment(struct apply_state *state,
- const char *line,
- unsigned long size,
- struct patch *patch,
- struct fragment *fragment)
-{
- int added, deleted;
- int len = linelen(line, size), offset;
- unsigned long oldlines, newlines;
- unsigned long leading, trailing;
-
- offset = parse_fragment_header(line, len, fragment);
- if (offset < 0)
- return -1;
- if (offset > 0 && patch->recount)
- recount_diff(line + offset, size - offset, fragment);
- oldlines = fragment->oldlines;
- newlines = fragment->newlines;
- leading = 0;
- trailing = 0;
-
- /* Parse the thing.. */
- line += len;
- size -= len;
- state->linenr++;
- added = deleted = 0;
- for (offset = len;
- 0 < size;
- offset += len, size -= len, line += len, state->linenr++) {
- if (!oldlines && !newlines)
- break;
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- return -1;
- switch (*line) {
- default:
- return -1;
- case '\n': /* newer GNU diff, an empty context line */
- case ' ':
- oldlines--;
- newlines--;
- if (!deleted && !added)
- leading++;
- trailing++;
- if (!state->apply_in_reverse &&
- state->ws_error_action == correct_ws_error)
- check_whitespace(state, line, len, patch->ws_rule);
- break;
- case '-':
- if (state->apply_in_reverse &&
- state->ws_error_action != nowarn_ws_error)
- check_whitespace(state, line, len, patch->ws_rule);
- deleted++;
- oldlines--;
- trailing = 0;
- break;
- case '+':
- if (!state->apply_in_reverse &&
- state->ws_error_action != nowarn_ws_error)
- check_whitespace(state, line, len, patch->ws_rule);
- added++;
- newlines--;
- trailing = 0;
- break;
-
- /*
- * We allow "\ No newline at end of file". Depending
- * on locale settings when the patch was produced we
- * don't know what this line looks like. The only
- * thing we do know is that it begins with "\ ".
- * Checking for 12 is just for sanity check -- any
- * l10n of "\ No newline..." is at least that long.
- */
- case '\\':
- if (len < 12 || memcmp(line, "\\ ", 2))
- return -1;
- break;
- }
- }
- if (oldlines || newlines)
- return -1;
- if (!deleted && !added)
- return -1;
-
- fragment->leading = leading;
- fragment->trailing = trailing;
-
- /*
- * If a fragment ends with an incomplete line, we failed to include
- * it in the above loop because we hit oldlines == newlines == 0
- * before seeing it.
- */
- if (12 < size && !memcmp(line, "\\ ", 2))
- offset += linelen(line, size);
-
- patch->lines_added += added;
- patch->lines_deleted += deleted;
-
- if (0 < patch->is_new && oldlines)
- return error(_("new file depends on old contents"));
- if (0 < patch->is_delete && newlines)
- return error(_("deleted file still has contents"));
- return offset;
-}
-
-/*
- * We have seen "diff --git a/... b/..." header (or a traditional patch
- * header). Read hunks that belong to this patch into fragments and hang
- * them to the given patch structure.
- *
- * The (fragment->patch, fragment->size) pair points into the memory given
- * by the caller, not a copy, when we return.
- */
-static int parse_single_patch(struct apply_state *state,
- const char *line,
- unsigned long size,
- struct patch *patch)
-{
- unsigned long offset = 0;
- unsigned long oldlines = 0, newlines = 0, context = 0;
- struct fragment **fragp = &patch->fragments;
-
- while (size > 4 && !memcmp(line, "@@ -", 4)) {
- struct fragment *fragment;
- int len;
-
- fragment = xcalloc(1, sizeof(*fragment));
- fragment->linenr = state->linenr;
- len = parse_fragment(state, line, size, patch, fragment);
- if (len <= 0)
- die(_("corrupt patch at line %d"), state->linenr);
- fragment->patch = line;
- fragment->size = len;
- oldlines += fragment->oldlines;
- newlines += fragment->newlines;
- context += fragment->leading + fragment->trailing;
-
- *fragp = fragment;
- fragp = &fragment->next;
-
- offset += len;
- line += len;
- size -= len;
- }
-
- /*
- * If something was removed (i.e. we have old-lines) it cannot
- * be creation, and if something was added it cannot be
- * deletion. However, the reverse is not true; --unified=0
- * patches that only add are not necessarily creation even
- * though they do not have any old lines, and ones that only
- * delete are not necessarily deletion.
- *
- * Unfortunately, a real creation/deletion patch do _not_ have
- * any context line by definition, so we cannot safely tell it
- * apart with --unified=0 insanity. At least if the patch has
- * more than one hunk it is not creation or deletion.
- */
- if (patch->is_new < 0 &&
- (oldlines || (patch->fragments && patch->fragments->next)))
- patch->is_new = 0;
- if (patch->is_delete < 0 &&
- (newlines || (patch->fragments && patch->fragments->next)))
- patch->is_delete = 0;
-
- if (0 < patch->is_new && oldlines)
- die(_("new file %s depends on old contents"), patch->new_name);
- if (0 < patch->is_delete && newlines)
- die(_("deleted file %s still has contents"), patch->old_name);
- if (!patch->is_delete && !newlines && context)
- fprintf_ln(stderr,
- _("** warning: "
- "file %s becomes empty but is not deleted"),
- patch->new_name);
-
- return offset;
-}
-
-static inline int metadata_changes(struct patch *patch)
-{
- return patch->is_rename > 0 ||
- patch->is_copy > 0 ||
- patch->is_new > 0 ||
- patch->is_delete ||
- (patch->old_mode && patch->new_mode &&
- patch->old_mode != patch->new_mode);
-}
-
-static char *inflate_it(const void *data, unsigned long size,
- unsigned long inflated_size)
-{
- git_zstream stream;
- void *out;
- int st;
-
- memset(&stream, 0, sizeof(stream));
-
- stream.next_in = (unsigned char *)data;
- stream.avail_in = size;
- stream.next_out = out = xmalloc(inflated_size);
- stream.avail_out = inflated_size;
- git_inflate_init(&stream);
- st = git_inflate(&stream, Z_FINISH);
- git_inflate_end(&stream);
- if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
- free(out);
- return NULL;
- }
- return out;
-}
-
-/*
- * Read a binary hunk and return a new fragment; fragment->patch
- * points at an allocated memory that the caller must free, so
- * it is marked as "->free_patch = 1".
- */
-static struct fragment *parse_binary_hunk(struct apply_state *state,
- char **buf_p,
- unsigned long *sz_p,
- int *status_p,
- int *used_p)
-{
- /*
- * Expect a line that begins with binary patch method ("literal"
- * or "delta"), followed by the length of data before deflating.
- * a sequence of 'length-byte' followed by base-85 encoded data
- * should follow, terminated by a newline.
- *
- * Each 5-byte sequence of base-85 encodes up to 4 bytes,
- * and we would limit the patch line to 66 characters,
- * so one line can fit up to 13 groups that would decode
- * to 52 bytes max. The length byte 'A'-'Z' corresponds
- * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
- */
- int llen, used;
- unsigned long size = *sz_p;
- char *buffer = *buf_p;
- int patch_method;
- unsigned long origlen;
- char *data = NULL;
- int hunk_size = 0;
- struct fragment *frag;
-
- llen = linelen(buffer, size);
- used = llen;
-
- *status_p = 0;
-
- if (starts_with(buffer, "delta ")) {
- patch_method = BINARY_DELTA_DEFLATED;
- origlen = strtoul(buffer + 6, NULL, 10);
- }
- else if (starts_with(buffer, "literal ")) {
- patch_method = BINARY_LITERAL_DEFLATED;
- origlen = strtoul(buffer + 8, NULL, 10);
- }
- else
- return NULL;
-
- state->linenr++;
- buffer += llen;
- while (1) {
- int byte_length, max_byte_length, newsize;
- llen = linelen(buffer, size);
- used += llen;
- state->linenr++;
- if (llen == 1) {
- /* consume the blank line */
- buffer++;
- size--;
- break;
- }
- /*
- * Minimum line is "A00000\n" which is 7-byte long,
- * and the line length must be multiple of 5 plus 2.
- */
- if ((llen < 7) || (llen-2) % 5)
- goto corrupt;
- max_byte_length = (llen - 2) / 5 * 4;
- byte_length = *buffer;
- if ('A' <= byte_length && byte_length <= 'Z')
- byte_length = byte_length - 'A' + 1;
- else if ('a' <= byte_length && byte_length <= 'z')
- byte_length = byte_length - 'a' + 27;
- else
- goto corrupt;
- /* if the input length was not multiple of 4, we would
- * have filler at the end but the filler should never
- * exceed 3 bytes
- */
- if (max_byte_length < byte_length ||
- byte_length <= max_byte_length - 4)
- goto corrupt;
- newsize = hunk_size + byte_length;
- data = xrealloc(data, newsize);
- if (decode_85(data + hunk_size, buffer + 1, byte_length))
- goto corrupt;
- hunk_size = newsize;
- buffer += llen;
- size -= llen;
- }
-
- frag = xcalloc(1, sizeof(*frag));
- frag->patch = inflate_it(data, hunk_size, origlen);
- frag->free_patch = 1;
- if (!frag->patch)
- goto corrupt;
- free(data);
- frag->size = origlen;
- *buf_p = buffer;
- *sz_p = size;
- *used_p = used;
- frag->binary_patch_method = patch_method;
- return frag;
-
- corrupt:
- free(data);
- *status_p = -1;
- error(_("corrupt binary patch at line %d: %.*s"),
- state->linenr-1, llen-1, buffer);
- return NULL;
-}
-
-/*
- * Returns:
- * -1 in case of error,
- * the length of the parsed binary patch otherwise
- */
-static int parse_binary(struct apply_state *state,
- char *buffer,
- unsigned long size,
- struct patch *patch)
-{
- /*
- * We have read "GIT binary patch\n"; what follows is a line
- * that says the patch method (currently, either "literal" or
- * "delta") and the length of data before deflating; a
- * sequence of 'length-byte' followed by base-85 encoded data
- * follows.
- *
- * When a binary patch is reversible, there is another binary
- * hunk in the same format, starting with patch method (either
- * "literal" or "delta") with the length of data, and a sequence
- * of length-byte + base-85 encoded data, terminated with another
- * empty line. This data, when applied to the postimage, produces
- * the preimage.
- */
- struct fragment *forward;
- struct fragment *reverse;
- int status;
- int used, used_1;
-
- forward = parse_binary_hunk(state, &buffer, &size, &status, &used);
- if (!forward && !status)
- /* there has to be one hunk (forward hunk) */
- return error(_("unrecognized binary patch at line %d"), state->linenr-1);
- if (status)
- /* otherwise we already gave an error message */
- return status;
-
- reverse = parse_binary_hunk(state, &buffer, &size, &status, &used_1);
- if (reverse)
- used += used_1;
- else if (status) {
- /*
- * Not having reverse hunk is not an error, but having
- * a corrupt reverse hunk is.
- */
- free((void*) forward->patch);
- free(forward);
- return status;
- }
- forward->next = reverse;
- patch->fragments = forward;
- patch->is_binary = 1;
- return used;
-}
-
-static void prefix_one(struct apply_state *state, char **name)
-{
- char *old_name = *name;
- if (!old_name)
- return;
- *name = xstrdup(prefix_filename(state->prefix, state->prefix_length, *name));
- free(old_name);
-}
-
-static void prefix_patch(struct apply_state *state, struct patch *p)
-{
- if (!state->prefix || p->is_toplevel_relative)
- return;
- prefix_one(state, &p->new_name);
- prefix_one(state, &p->old_name);
-}
-
-/*
- * include/exclude
- */
-
-static void add_name_limit(struct apply_state *state,
- const char *name,
- int exclude)
-{
- struct string_list_item *it;
-
- it = string_list_append(&state->limit_by_name, name);
- it->util = exclude ? NULL : (void *) 1;
-}
-
-static int use_patch(struct apply_state *state, struct patch *p)
-{
- const char *pathname = p->new_name ? p->new_name : p->old_name;
- int i;
-
- /* Paths outside are not touched regardless of "--include" */
- if (0 < state->prefix_length) {
- int pathlen = strlen(pathname);
- if (pathlen <= state->prefix_length ||
- memcmp(state->prefix, pathname, state->prefix_length))
- return 0;
- }
-
- /* See if it matches any of exclude/include rule */
- for (i = 0; i < state->limit_by_name.nr; i++) {
- struct string_list_item *it = &state->limit_by_name.items[i];
- if (!wildmatch(it->string, pathname, 0, NULL))
- return (it->util != NULL);
- }
-
- /*
- * If we had any include, a path that does not match any rule is
- * not used. Otherwise, we saw bunch of exclude rules (or none)
- * and such a path is used.
- */
- return !state->has_include;
-}
-
-
-/*
- * Read the patch text in "buffer" that extends for "size" bytes; stop
- * reading after seeing a single patch (i.e. changes to a single file).
- * Create fragments (i.e. patch hunks) and hang them to the given patch.
- * Return the number of bytes consumed, so that the caller can call us
- * again for the next patch.
- */
-static int parse_chunk(struct apply_state *state, char *buffer, unsigned long size, struct patch *patch)
-{
- int hdrsize, patchsize;
- int offset = find_header(state, buffer, size, &hdrsize, patch);
-
- if (offset < 0)
- return offset;
-
- prefix_patch(state, patch);
-
- if (!use_patch(state, patch))
- patch->ws_rule = 0;
- else
- patch->ws_rule = whitespace_rule(patch->new_name
- ? patch->new_name
- : patch->old_name);
-
- patchsize = parse_single_patch(state,
- buffer + offset + hdrsize,
- size - offset - hdrsize,
- patch);
-
- if (!patchsize) {
- static const char git_binary[] = "GIT binary patch\n";
- int hd = hdrsize + offset;
- unsigned long llen = linelen(buffer + hd, size - hd);
-
- if (llen == sizeof(git_binary) - 1 &&
- !memcmp(git_binary, buffer + hd, llen)) {
- int used;
- state->linenr++;
- used = parse_binary(state, buffer + hd + llen,
- size - hd - llen, patch);
- if (used < 0)
- return -1;
- if (used)
- patchsize = used + llen;
- else
- patchsize = 0;
- }
- else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
- static const char *binhdr[] = {
- "Binary files ",
- "Files ",
- NULL,
- };
- int i;
- for (i = 0; binhdr[i]; i++) {
- int len = strlen(binhdr[i]);
- if (len < size - hd &&
- !memcmp(binhdr[i], buffer + hd, len)) {
- state->linenr++;
- patch->is_binary = 1;
- patchsize = llen;
- break;
- }
- }
- }
-
- /* Empty patch cannot be applied if it is a text patch
- * without metadata change. A binary patch appears
- * empty to us here.
- */
- if ((state->apply || state->check) &&
- (!patch->is_binary && !metadata_changes(patch)))
- die(_("patch with only garbage at line %d"), state->linenr);
- }
-
- return offset + hdrsize + patchsize;
-}
-
-#define swap(a,b) myswap((a),(b),sizeof(a))
-
-#define myswap(a, b, size) do { \
- unsigned char mytmp[size]; \
- memcpy(mytmp, &a, size); \
- memcpy(&a, &b, size); \
- memcpy(&b, mytmp, size); \
-} while (0)
-
-static void reverse_patches(struct patch *p)
-{
- for (; p; p = p->next) {
- struct fragment *frag = p->fragments;
-
- swap(p->new_name, p->old_name);
- swap(p->new_mode, p->old_mode);
- swap(p->is_new, p->is_delete);
- swap(p->lines_added, p->lines_deleted);
- swap(p->old_sha1_prefix, p->new_sha1_prefix);
-
- for (; frag; frag = frag->next) {
- swap(frag->newpos, frag->oldpos);
- swap(frag->newlines, frag->oldlines);
- }
- }
-}
-
-static const char pluses[] =
-"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
-static const char minuses[]=
-"----------------------------------------------------------------------";
-
-static void show_stats(struct apply_state *state, struct patch *patch)
-{
- struct strbuf qname = STRBUF_INIT;
- char *cp = patch->new_name ? patch->new_name : patch->old_name;
- int max, add, del;
-
- quote_c_style(cp, &qname, NULL, 0);
-
- /*
- * "scale" the filename
- */
- max = state->max_len;
- if (max > 50)
- max = 50;
-
- if (qname.len > max) {
- cp = strchr(qname.buf + qname.len + 3 - max, '/');
- if (!cp)
- cp = qname.buf + qname.len + 3 - max;
- strbuf_splice(&qname, 0, cp - qname.buf, "...", 3);
- }
-
- if (patch->is_binary) {
- printf(" %-*s | Bin\n", max, qname.buf);
- strbuf_release(&qname);
- return;
- }
-
- printf(" %-*s |", max, qname.buf);
- strbuf_release(&qname);
-
- /*
- * scale the add/delete
- */
- max = max + state->max_change > 70 ? 70 - max : state->max_change;
- add = patch->lines_added;
- del = patch->lines_deleted;
-
- if (state->max_change > 0) {
- int total = ((add + del) * max + state->max_change / 2) / state->max_change;
- add = (add * max + state->max_change / 2) / state->max_change;
- del = total - add;
- }
- printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted,
- add, pluses, del, minuses);
-}
-
-static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
-{
- switch (st->st_mode & S_IFMT) {
- case S_IFLNK:
- if (strbuf_readlink(buf, path, st->st_size) < 0)
- return error(_("unable to read symlink %s"), path);
- return 0;
- case S_IFREG:
- if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
- return error(_("unable to open or read %s"), path);
- convert_to_git(path, buf->buf, buf->len, buf, 0);
- return 0;
- default:
- return -1;
- }
-}
-
-/*
- * Update the preimage, and the common lines in postimage,
- * from buffer buf of length len. If postlen is 0 the postimage
- * is updated in place, otherwise it's updated on a new buffer
- * of length postlen
- */
-
-static void update_pre_post_images(struct image *preimage,
- struct image *postimage,
- char *buf,
- size_t len, size_t postlen)
-{
- int i, ctx, reduced;
- char *new, *old, *fixed;
- struct image fixed_preimage;
-
- /*
- * Update the preimage with whitespace fixes. Note that we
- * are not losing preimage->buf -- apply_one_fragment() will
- * free "oldlines".
- */
- prepare_image(&fixed_preimage, buf, len, 1);
- assert(postlen
- ? fixed_preimage.nr == preimage->nr
- : fixed_preimage.nr <= preimage->nr);
- for (i = 0; i < fixed_preimage.nr; i++)
- fixed_preimage.line[i].flag = preimage->line[i].flag;
- free(preimage->line_allocated);
- *preimage = fixed_preimage;
-
- /*
- * Adjust the common context lines in postimage. This can be
- * done in-place when we are shrinking it with whitespace
- * fixing, but needs a new buffer when ignoring whitespace or
- * expanding leading tabs to spaces.
- *
- * We trust the caller to tell us if the update can be done
- * in place (postlen==0) or not.
- */
- old = postimage->buf;
- if (postlen)
- new = postimage->buf = xmalloc(postlen);
- else
- new = old;
- fixed = preimage->buf;
-
- for (i = reduced = ctx = 0; i < postimage->nr; i++) {
- size_t l_len = postimage->line[i].len;
- if (!(postimage->line[i].flag & LINE_COMMON)) {
- /* an added line -- no counterparts in preimage */
- memmove(new, old, l_len);
- old += l_len;
- new += l_len;
- continue;
- }
-
- /* a common context -- skip it in the original postimage */
- old += l_len;
-
- /* and find the corresponding one in the fixed preimage */
- while (ctx < preimage->nr &&
- !(preimage->line[ctx].flag & LINE_COMMON)) {
- fixed += preimage->line[ctx].len;
- ctx++;
- }
-
- /*
- * preimage is expected to run out, if the caller
- * fixed addition of trailing blank lines.
- */
- if (preimage->nr <= ctx) {
- reduced++;
- continue;
- }
-
- /* and copy it in, while fixing the line length */
- l_len = preimage->line[ctx].len;
- memcpy(new, fixed, l_len);
- new += l_len;
- fixed += l_len;
- postimage->line[i].len = l_len;
- ctx++;
- }
-
- if (postlen
- ? postlen < new - postimage->buf
- : postimage->len < new - postimage->buf)
- die("BUG: caller miscounted postlen: asked %d, orig = %d, used = %d",
- (int)postlen, (int) postimage->len, (int)(new - postimage->buf));
-
- /* Fix the length of the whole thing */
- postimage->len = new - postimage->buf;
- postimage->nr -= reduced;
-}
-
-static int line_by_line_fuzzy_match(struct image *img,
- struct image *preimage,
- struct image *postimage,
- unsigned long try,
- int try_lno,
- int preimage_limit)
-{
- int i;
- size_t imgoff = 0;
- size_t preoff = 0;
- size_t postlen = postimage->len;
- size_t extra_chars;
- char *buf;
- char *preimage_eof;
- char *preimage_end;
- struct strbuf fixed;
- char *fixed_buf;
- size_t fixed_len;
-
- for (i = 0; i < preimage_limit; i++) {
- size_t prelen = preimage->line[i].len;
- size_t imglen = img->line[try_lno+i].len;
-
- if (!fuzzy_matchlines(img->buf + try + imgoff, imglen,
- preimage->buf + preoff, prelen))
- return 0;
- if (preimage->line[i].flag & LINE_COMMON)
- postlen += imglen - prelen;
- imgoff += imglen;
- preoff += prelen;
- }
-
- /*
- * Ok, the preimage matches with whitespace fuzz.
- *
- * imgoff now holds the true length of the target that
- * matches the preimage before the end of the file.
- *
- * Count the number of characters in the preimage that fall
- * beyond the end of the file and make sure that all of them
- * are whitespace characters. (This can only happen if
- * we are removing blank lines at the end of the file.)
- */
- buf = preimage_eof = preimage->buf + preoff;
- for ( ; i < preimage->nr; i++)
- preoff += preimage->line[i].len;
- preimage_end = preimage->buf + preoff;
- for ( ; buf < preimage_end; buf++)
- if (!isspace(*buf))
- return 0;
-
- /*
- * Update the preimage and the common postimage context
- * lines to use the same whitespace as the target.
- * If whitespace is missing in the target (i.e.
- * if the preimage extends beyond the end of the file),
- * use the whitespace from the preimage.
- */
- extra_chars = preimage_end - preimage_eof;
- strbuf_init(&fixed, imgoff + extra_chars);
- strbuf_add(&fixed, img->buf + try, imgoff);
- strbuf_add(&fixed, preimage_eof, extra_chars);
- fixed_buf = strbuf_detach(&fixed, &fixed_len);
- update_pre_post_images(preimage, postimage,
- fixed_buf, fixed_len, postlen);
- return 1;
-}
-
-static int match_fragment(struct apply_state *state,
- struct image *img,
- struct image *preimage,
- struct image *postimage,
- unsigned long try,
- int try_lno,
- unsigned ws_rule,
- int match_beginning, int match_end)
-{
- int i;
- char *fixed_buf, *buf, *orig, *target;
- struct strbuf fixed;
- size_t fixed_len, postlen;
- int preimage_limit;
-
- if (preimage->nr + try_lno <= img->nr) {
- /*
- * The hunk falls within the boundaries of img.
- */
- preimage_limit = preimage->nr;
- if (match_end && (preimage->nr + try_lno != img->nr))
- return 0;
- } else if (state->ws_error_action == correct_ws_error &&
- (ws_rule & WS_BLANK_AT_EOF)) {
- /*
- * This hunk extends beyond the end of img, and we are
- * removing blank lines at the end of the file. This
- * many lines from the beginning of the preimage must
- * match with img, and the remainder of the preimage
- * must be blank.
- */
- preimage_limit = img->nr - try_lno;
- } else {
- /*
- * The hunk extends beyond the end of the img and
- * we are not removing blanks at the end, so we
- * should reject the hunk at this position.
- */
- return 0;
- }
-
- if (match_beginning && try_lno)
- return 0;
-
- /* Quick hash check */
- for (i = 0; i < preimage_limit; i++)
- if ((img->line[try_lno + i].flag & LINE_PATCHED) ||
- (preimage->line[i].hash != img->line[try_lno + i].hash))
- return 0;
-
- if (preimage_limit == preimage->nr) {
- /*
- * Do we have an exact match? If we were told to match
- * at the end, size must be exactly at try+fragsize,
- * otherwise try+fragsize must be still within the preimage,
- * and either case, the old piece should match the preimage
- * exactly.
- */
- if ((match_end
- ? (try + preimage->len == img->len)
- : (try + preimage->len <= img->len)) &&
- !memcmp(img->buf + try, preimage->buf, preimage->len))
- return 1;
- } else {
- /*
- * The preimage extends beyond the end of img, so
- * there cannot be an exact match.
- *
- * There must be one non-blank context line that match
- * a line before the end of img.
- */
- char *buf_end;
-
- buf = preimage->buf;
- buf_end = buf;
- for (i = 0; i < preimage_limit; i++)
- buf_end += preimage->line[i].len;
-
- for ( ; buf < buf_end; buf++)
- if (!isspace(*buf))
- break;
- if (buf == buf_end)
- return 0;
- }
-
- /*
- * No exact match. If we are ignoring whitespace, run a line-by-line
- * fuzzy matching. We collect all the line length information because
- * we need it to adjust whitespace if we match.
- */
- if (state->ws_ignore_action == ignore_ws_change)
- return line_by_line_fuzzy_match(img, preimage, postimage,
- try, try_lno, preimage_limit);
-
- if (state->ws_error_action != correct_ws_error)
- return 0;
-
- /*
- * The hunk does not apply byte-by-byte, but the hash says
- * it might with whitespace fuzz. We weren't asked to
- * ignore whitespace, we were asked to correct whitespace
- * errors, so let's try matching after whitespace correction.
- *
- * While checking the preimage against the target, whitespace
- * errors in both fixed, we count how large the corresponding
- * postimage needs to be. The postimage prepared by
- * apply_one_fragment() has whitespace errors fixed on added
- * lines already, but the common lines were propagated as-is,
- * which may become longer when their whitespace errors are
- * fixed.
- */
-
- /* First count added lines in postimage */
- postlen = 0;
- for (i = 0; i < postimage->nr; i++) {
- if (!(postimage->line[i].flag & LINE_COMMON))
- postlen += postimage->line[i].len;
- }
-
- /*
- * The preimage may extend beyond the end of the file,
- * but in this loop we will only handle the part of the
- * preimage that falls within the file.
- */
- strbuf_init(&fixed, preimage->len + 1);
- orig = preimage->buf;
- target = img->buf + try;
- for (i = 0; i < preimage_limit; i++) {
- size_t oldlen = preimage->line[i].len;
- size_t tgtlen = img->line[try_lno + i].len;
- size_t fixstart = fixed.len;
- struct strbuf tgtfix;
- int match;
-
- /* Try fixing the line in the preimage */
- ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
-
- /* Try fixing the line in the target */
- strbuf_init(&tgtfix, tgtlen);
- ws_fix_copy(&tgtfix, target, tgtlen, ws_rule, NULL);
-
- /*
- * If they match, either the preimage was based on
- * a version before our tree fixed whitespace breakage,
- * or we are lacking a whitespace-fix patch the tree
- * the preimage was based on already had (i.e. target
- * has whitespace breakage, the preimage doesn't).
- * In either case, we are fixing the whitespace breakages
- * so we might as well take the fix together with their
- * real change.
- */
- match = (tgtfix.len == fixed.len - fixstart &&
- !memcmp(tgtfix.buf, fixed.buf + fixstart,
- fixed.len - fixstart));
-
- /* Add the length if this is common with the postimage */
- if (preimage->line[i].flag & LINE_COMMON)
- postlen += tgtfix.len;
-
- strbuf_release(&tgtfix);
- if (!match)
- goto unmatch_exit;
-
- orig += oldlen;
- target += tgtlen;
- }
-
-
- /*
- * Now handle the lines in the preimage that falls beyond the
- * end of the file (if any). They will only match if they are
- * empty or only contain whitespace (if WS_BLANK_AT_EOL is
- * false).
- */
- for ( ; i < preimage->nr; i++) {
- size_t fixstart = fixed.len; /* start of the fixed preimage */
- size_t oldlen = preimage->line[i].len;
- int j;
-
- /* Try fixing the line in the preimage */
- ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
-
- for (j = fixstart; j < fixed.len; j++)
- if (!isspace(fixed.buf[j]))
- goto unmatch_exit;
-
- orig += oldlen;
- }
-
- /*
- * Yes, the preimage is based on an older version that still
- * has whitespace breakages unfixed, and fixing them makes the
- * hunk match. Update the context lines in the postimage.
- */
- fixed_buf = strbuf_detach(&fixed, &fixed_len);
- if (postlen < postimage->len)
- postlen = 0;
- update_pre_post_images(preimage, postimage,
- fixed_buf, fixed_len, postlen);
- return 1;
-
- unmatch_exit:
- strbuf_release(&fixed);
- return 0;
-}
-
-static int find_pos(struct apply_state *state,
- struct image *img,
- struct image *preimage,
- struct image *postimage,
- int line,
- unsigned ws_rule,
- int match_beginning, int match_end)
-{
- int i;
- unsigned long backwards, forwards, try;
- int backwards_lno, forwards_lno, try_lno;
-
- /*
- * If match_beginning or match_end is specified, there is no
- * point starting from a wrong line that will never match and
- * wander around and wait for a match at the specified end.
- */
- if (match_beginning)
- line = 0;
- else if (match_end)
- line = img->nr - preimage->nr;
-
- /*
- * Because the comparison is unsigned, the following test
- * will also take care of a negative line number that can
- * result when match_end and preimage is larger than the target.
- */
- if ((size_t) line > img->nr)
- line = img->nr;
-
- try = 0;
- for (i = 0; i < line; i++)
- try += img->line[i].len;
-
- /*
- * There's probably some smart way to do this, but I'll leave
- * that to the smart and beautiful people. I'm simple and stupid.
- */
- backwards = try;
- backwards_lno = line;
- forwards = try;
- forwards_lno = line;
- try_lno = line;
-
- for (i = 0; ; i++) {
- if (match_fragment(state, img, preimage, postimage,
- try, try_lno, ws_rule,
- match_beginning, match_end))
- return try_lno;
-
- again:
- if (backwards_lno == 0 && forwards_lno == img->nr)
- break;
-
- if (i & 1) {
- if (backwards_lno == 0) {
- i++;
- goto again;
- }
- backwards_lno--;
- backwards -= img->line[backwards_lno].len;
- try = backwards;
- try_lno = backwards_lno;
- } else {
- if (forwards_lno == img->nr) {
- i++;
- goto again;
- }
- forwards += img->line[forwards_lno].len;
- forwards_lno++;
- try = forwards;
- try_lno = forwards_lno;
- }
-
- }
- return -1;
-}
-
-static void remove_first_line(struct image *img)
-{
- img->buf += img->line[0].len;
- img->len -= img->line[0].len;
- img->line++;
- img->nr--;
-}
-
-static void remove_last_line(struct image *img)
-{
- img->len -= img->line[--img->nr].len;
-}
-
-/*
- * The change from "preimage" and "postimage" has been found to
- * apply at applied_pos (counts in line numbers) in "img".
- * Update "img" to remove "preimage" and replace it with "postimage".
- */
-static void update_image(struct apply_state *state,
- struct image *img,
- int applied_pos,
- struct image *preimage,
- struct image *postimage)
-{
- /*
- * remove the copy of preimage at offset in img
- * and replace it with postimage
- */
- int i, nr;
- size_t remove_count, insert_count, applied_at = 0;
- char *result;
- int preimage_limit;
-
- /*
- * If we are removing blank lines at the end of img,
- * the preimage may extend beyond the end.
- * If that is the case, we must be careful only to
- * remove the part of the preimage that falls within
- * the boundaries of img. Initialize preimage_limit
- * to the number of lines in the preimage that falls
- * within the boundaries.
- */
- preimage_limit = preimage->nr;
- if (preimage_limit > img->nr - applied_pos)
- preimage_limit = img->nr - applied_pos;
-
- for (i = 0; i < applied_pos; i++)
- applied_at += img->line[i].len;
-
- remove_count = 0;
- for (i = 0; i < preimage_limit; i++)
- remove_count += img->line[applied_pos + i].len;
- insert_count = postimage->len;
-
- /* Adjust the contents */
- result = xmalloc(st_add3(st_sub(img->len, remove_count), insert_count, 1));
- memcpy(result, img->buf, applied_at);
- memcpy(result + applied_at, postimage->buf, postimage->len);
- memcpy(result + applied_at + postimage->len,
- img->buf + (applied_at + remove_count),
- img->len - (applied_at + remove_count));
- free(img->buf);
- img->buf = result;
- img->len += insert_count - remove_count;
- result[img->len] = '\0';
-
- /* Adjust the line table */
- nr = img->nr + postimage->nr - preimage_limit;
- if (preimage_limit < postimage->nr) {
- /*
- * NOTE: this knows that we never call remove_first_line()
- * on anything other than pre/post image.
- */
- REALLOC_ARRAY(img->line, nr);
- img->line_allocated = img->line;
- }
- if (preimage_limit != postimage->nr)
- memmove(img->line + applied_pos + postimage->nr,
- img->line + applied_pos + preimage_limit,
- (img->nr - (applied_pos + preimage_limit)) *
- sizeof(*img->line));
- memcpy(img->line + applied_pos,
- postimage->line,
- postimage->nr * sizeof(*img->line));
- if (!state->allow_overlap)
- for (i = 0; i < postimage->nr; i++)
- img->line[applied_pos + i].flag |= LINE_PATCHED;
- img->nr = nr;
-}
-
-/*
- * Use the patch-hunk text in "frag" to prepare two images (preimage and
- * postimage) for the hunk. Find lines that match "preimage" in "img" and
- * replace the part of "img" with "postimage" text.
- */
-static int apply_one_fragment(struct apply_state *state,
- struct image *img, struct fragment *frag,
- int inaccurate_eof, unsigned ws_rule,
- int nth_fragment)
-{
- int match_beginning, match_end;
- const char *patch = frag->patch;
- int size = frag->size;
- char *old, *oldlines;
- struct strbuf newlines;
- int new_blank_lines_at_end = 0;
- int found_new_blank_lines_at_end = 0;
- int hunk_linenr = frag->linenr;
- unsigned long leading, trailing;
- int pos, applied_pos;
- struct image preimage;
- struct image postimage;
-
- memset(&preimage, 0, sizeof(preimage));
- memset(&postimage, 0, sizeof(postimage));
- oldlines = xmalloc(size);
- strbuf_init(&newlines, size);
-
- old = oldlines;
- while (size > 0) {
- char first;
- int len = linelen(patch, size);
- int plen;
- int added_blank_line = 0;
- int is_blank_context = 0;
- size_t start;
-
- if (!len)
- break;
-
- /*
- * "plen" is how much of the line we should use for
- * the actual patch data. Normally we just remove the
- * first character on the line, but if the line is
- * followed by "\ No newline", then we also remove the
- * last one (which is the newline, of course).
- */
- plen = len - 1;
- if (len < size && patch[len] == '\\')
- plen--;
- first = *patch;
- if (state->apply_in_reverse) {
- if (first == '-')
- first = '+';
- else if (first == '+')
- first = '-';
- }
-
- switch (first) {
- case '\n':
- /* Newer GNU diff, empty context line */
- if (plen < 0)
- /* ... followed by '\No newline'; nothing */
- break;
- *old++ = '\n';
- strbuf_addch(&newlines, '\n');
- add_line_info(&preimage, "\n", 1, LINE_COMMON);
- add_line_info(&postimage, "\n", 1, LINE_COMMON);
- is_blank_context = 1;
- break;
- case ' ':
- if (plen && (ws_rule & WS_BLANK_AT_EOF) &&
- ws_blank_line(patch + 1, plen, ws_rule))
- is_blank_context = 1;
- case '-':
- memcpy(old, patch + 1, plen);
- add_line_info(&preimage, old, plen,
- (first == ' ' ? LINE_COMMON : 0));
- old += plen;
- if (first == '-')
- break;
- /* Fall-through for ' ' */
- case '+':
- /* --no-add does not add new lines */
- if (first == '+' && state->no_add)
- break;
-
- start = newlines.len;
- if (first != '+' ||
- !state->whitespace_error ||
- state->ws_error_action != correct_ws_error) {
- strbuf_add(&newlines, patch + 1, plen);
- }
- else {
- ws_fix_copy(&newlines, patch + 1, plen, ws_rule, &state->applied_after_fixing_ws);
- }
- add_line_info(&postimage, newlines.buf + start, newlines.len - start,
- (first == '+' ? 0 : LINE_COMMON));
- if (first == '+' &&
- (ws_rule & WS_BLANK_AT_EOF) &&
- ws_blank_line(patch + 1, plen, ws_rule))
- added_blank_line = 1;
- break;
- case '@': case '\\':
- /* Ignore it, we already handled it */
- break;
- default:
- if (state->apply_verbosely)
- error(_("invalid start of line: '%c'"), first);
- applied_pos = -1;
- goto out;
- }
- if (added_blank_line) {
- if (!new_blank_lines_at_end)
- found_new_blank_lines_at_end = hunk_linenr;
- new_blank_lines_at_end++;
- }
- else if (is_blank_context)
- ;
- else
- new_blank_lines_at_end = 0;
- patch += len;
- size -= len;
- hunk_linenr++;
- }
- if (inaccurate_eof &&
- old > oldlines && old[-1] == '\n' &&
- newlines.len > 0 && newlines.buf[newlines.len - 1] == '\n') {
- old--;
- strbuf_setlen(&newlines, newlines.len - 1);
- }
-
- leading = frag->leading;
- trailing = frag->trailing;
-
- /*
- * A hunk to change lines at the beginning would begin with
- * @@ -1,L +N,M @@
- * but we need to be careful. -U0 that inserts before the second
- * line also has this pattern.
- *
- * And a hunk to add to an empty file would begin with
- * @@ -0,0 +N,M @@
- *
- * In other words, a hunk that is (frag->oldpos <= 1) with or
- * without leading context must match at the beginning.
- */
- match_beginning = (!frag->oldpos ||
- (frag->oldpos == 1 && !state->unidiff_zero));
-
- /*
- * A hunk without trailing lines must match at the end.
- * However, we simply cannot tell if a hunk must match end
- * from the lack of trailing lines if the patch was generated
- * with unidiff without any context.
- */
- match_end = !state->unidiff_zero && !trailing;
-
- pos = frag->newpos ? (frag->newpos - 1) : 0;
- preimage.buf = oldlines;
- preimage.len = old - oldlines;
- postimage.buf = newlines.buf;
- postimage.len = newlines.len;
- preimage.line = preimage.line_allocated;
- postimage.line = postimage.line_allocated;
-
- for (;;) {
-
- applied_pos = find_pos(state, img, &preimage, &postimage, pos,
- ws_rule, match_beginning, match_end);
-
- if (applied_pos >= 0)
- break;
-
- /* Am I at my context limits? */
- if ((leading <= state->p_context) && (trailing <= state->p_context))
- break;
- if (match_beginning || match_end) {
- match_beginning = match_end = 0;
- continue;
- }
-
- /*
- * Reduce the number of context lines; reduce both
- * leading and trailing if they are equal otherwise
- * just reduce the larger context.
- */
- if (leading >= trailing) {
- remove_first_line(&preimage);
- remove_first_line(&postimage);
- pos--;
- leading--;
- }
- if (trailing > leading) {
- remove_last_line(&preimage);
- remove_last_line(&postimage);
- trailing--;
- }
- }
-
- if (applied_pos >= 0) {
- if (new_blank_lines_at_end &&
- preimage.nr + applied_pos >= img->nr &&
- (ws_rule & WS_BLANK_AT_EOF) &&
- state->ws_error_action != nowarn_ws_error) {
- record_ws_error(state, WS_BLANK_AT_EOF, "+", 1,
- found_new_blank_lines_at_end);
- if (state->ws_error_action == correct_ws_error) {
- while (new_blank_lines_at_end--)
- remove_last_line(&postimage);
- }
- /*
- * We would want to prevent write_out_results()
- * from taking place in apply_patch() that follows
- * the callchain led us here, which is:
- * apply_patch->check_patch_list->check_patch->
- * apply_data->apply_fragments->apply_one_fragment
- */
- if (state->ws_error_action == die_on_ws_error)
- state->apply = 0;
- }
-
- if (state->apply_verbosely && applied_pos != pos) {
- int offset = applied_pos - pos;
- if (state->apply_in_reverse)
- offset = 0 - offset;
- fprintf_ln(stderr,
- Q_("Hunk #%d succeeded at %d (offset %d line).",
- "Hunk #%d succeeded at %d (offset %d lines).",
- offset),
- nth_fragment, applied_pos + 1, offset);
- }
-
- /*
- * Warn if it was necessary to reduce the number
- * of context lines.
- */
- if ((leading != frag->leading) ||
- (trailing != frag->trailing))
- fprintf_ln(stderr, _("Context reduced to (%ld/%ld)"
- " to apply fragment at %d"),
- leading, trailing, applied_pos+1);
- update_image(state, img, applied_pos, &preimage, &postimage);
- } else {
- if (state->apply_verbosely)
- error(_("while searching for:\n%.*s"),
- (int)(old - oldlines), oldlines);
- }
-
-out:
- free(oldlines);
- strbuf_release(&newlines);
- free(preimage.line_allocated);
- free(postimage.line_allocated);
-
- return (applied_pos < 0);
-}
-
-static int apply_binary_fragment(struct apply_state *state,
- struct image *img,
- struct patch *patch)
-{
- struct fragment *fragment = patch->fragments;
- unsigned long len;
- void *dst;
-
- if (!fragment)
- return error(_("missing binary patch data for '%s'"),
- patch->new_name ?
- patch->new_name :
- patch->old_name);
-
- /* Binary patch is irreversible without the optional second hunk */
- if (state->apply_in_reverse) {
- if (!fragment->next)
- return error("cannot reverse-apply a binary patch "
- "without the reverse hunk to '%s'",
- patch->new_name
- ? patch->new_name : patch->old_name);
- fragment = fragment->next;
- }
- switch (fragment->binary_patch_method) {
- case BINARY_DELTA_DEFLATED:
- dst = patch_delta(img->buf, img->len, fragment->patch,
- fragment->size, &len);
- if (!dst)
- return -1;
- clear_image(img);
- img->buf = dst;
- img->len = len;
- return 0;
- case BINARY_LITERAL_DEFLATED:
- clear_image(img);
- img->len = fragment->size;
- img->buf = xmemdupz(fragment->patch, img->len);
- return 0;
- }
- return -1;
-}
-
-/*
- * Replace "img" with the result of applying the binary patch.
- * The binary patch data itself in patch->fragment is still kept
- * but the preimage prepared by the caller in "img" is freed here
- * or in the helper function apply_binary_fragment() this calls.
- */
-static int apply_binary(struct apply_state *state,
- struct image *img,
- struct patch *patch)
-{
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
- unsigned char sha1[20];
-
- /*
- * For safety, we require patch index line to contain
- * full 40-byte textual SHA1 for old and new, at least for now.
- */
- if (strlen(patch->old_sha1_prefix) != 40 ||
- strlen(patch->new_sha1_prefix) != 40 ||
- get_sha1_hex(patch->old_sha1_prefix, sha1) ||
- get_sha1_hex(patch->new_sha1_prefix, sha1))
- return error("cannot apply binary patch to '%s' "
- "without full index line", name);
-
- if (patch->old_name) {
- /*
- * See if the old one matches what the patch
- * applies to.
- */
- hash_sha1_file(img->buf, img->len, blob_type, sha1);
- if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
- return error("the patch applies to '%s' (%s), "
- "which does not match the "
- "current contents.",
- name, sha1_to_hex(sha1));
- }
- else {
- /* Otherwise, the old one must be empty. */
- if (img->len)
- return error("the patch applies to an empty "
- "'%s' but it is not empty", name);
- }
-
- get_sha1_hex(patch->new_sha1_prefix, sha1);
- if (is_null_sha1(sha1)) {
- clear_image(img);
- return 0; /* deletion patch */
- }
-
- if (has_sha1_file(sha1)) {
- /* We already have the postimage */
- enum object_type type;
- unsigned long size;
- char *result;
-
- result = read_sha1_file(sha1, &type, &size);
- if (!result)
- return error("the necessary postimage %s for "
- "'%s' cannot be read",
- patch->new_sha1_prefix, name);
- clear_image(img);
- img->buf = result;
- img->len = size;
- } else {
- /*
- * We have verified buf matches the preimage;
- * apply the patch data to it, which is stored
- * in the patch->fragments->{patch,size}.
- */
- if (apply_binary_fragment(state, img, patch))
- return error(_("binary patch does not apply to '%s'"),
- name);
-
- /* verify that the result matches */
- hash_sha1_file(img->buf, img->len, blob_type, sha1);
- if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
- return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
- name, patch->new_sha1_prefix, sha1_to_hex(sha1));
- }
-
- return 0;
-}
-
-static int apply_fragments(struct apply_state *state, struct image *img, struct patch *patch)
-{
- struct fragment *frag = patch->fragments;
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
- unsigned ws_rule = patch->ws_rule;
- unsigned inaccurate_eof = patch->inaccurate_eof;
- int nth = 0;
-
- if (patch->is_binary)
- return apply_binary(state, img, patch);
-
- while (frag) {
- nth++;
- if (apply_one_fragment(state, img, frag, inaccurate_eof, ws_rule, nth)) {
- error(_("patch failed: %s:%ld"), name, frag->oldpos);
- if (!state->apply_with_reject)
- return -1;
- frag->rejected = 1;
- }
- frag = frag->next;
- }
- return 0;
-}
-
-static int read_blob_object(struct strbuf *buf, const unsigned char *sha1, unsigned mode)
-{
- if (S_ISGITLINK(mode)) {
- strbuf_grow(buf, 100);
- strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(sha1));
- } else {
- enum object_type type;
- unsigned long sz;
- char *result;
-
- result = read_sha1_file(sha1, &type, &sz);
- if (!result)
- return -1;
- /* XXX read_sha1_file NUL-terminates */
- strbuf_attach(buf, result, sz, sz + 1);
- }
- return 0;
-}
-
-static int read_file_or_gitlink(const struct cache_entry *ce, struct strbuf *buf)
-{
- if (!ce)
- return 0;
- return read_blob_object(buf, ce->sha1, ce->ce_mode);
-}
-
-static struct patch *in_fn_table(struct apply_state *state, const char *name)
-{
- struct string_list_item *item;
-
- if (name == NULL)
- return NULL;
-
- item = string_list_lookup(&state->fn_table, name);
- if (item != NULL)
- return (struct patch *)item->util;
-
- return NULL;
-}
-
-/*
- * item->util in the filename table records the status of the path.
- * Usually it points at a patch (whose result records the contents
- * of it after applying it), but it could be PATH_WAS_DELETED for a
- * path that a previously applied patch has already removed, or
- * PATH_TO_BE_DELETED for a path that a later patch would remove.
- *
- * The latter is needed to deal with a case where two paths A and B
- * are swapped by first renaming A to B and then renaming B to A;
- * moving A to B should not be prevented due to presence of B as we
- * will remove it in a later patch.
- */
-#define PATH_TO_BE_DELETED ((struct patch *) -2)
-#define PATH_WAS_DELETED ((struct patch *) -1)
-
-static int to_be_deleted(struct patch *patch)
-{
- return patch == PATH_TO_BE_DELETED;
-}
-
-static int was_deleted(struct patch *patch)
-{
- return patch == PATH_WAS_DELETED;
-}
-
-static void add_to_fn_table(struct apply_state *state, struct patch *patch)
-{
- struct string_list_item *item;
-
- /*
- * Always add new_name unless patch is a deletion
- * This should cover the cases for normal diffs,
- * file creations and copies
- */
- if (patch->new_name != NULL) {
- item = string_list_insert(&state->fn_table, patch->new_name);
- item->util = patch;
- }
-
- /*
- * store a failure on rename/deletion cases because
- * later chunks shouldn't patch old names
- */
- if ((patch->new_name == NULL) || (patch->is_rename)) {
- item = string_list_insert(&state->fn_table, patch->old_name);
- item->util = PATH_WAS_DELETED;
- }
-}
-
-static void prepare_fn_table(struct apply_state *state, struct patch *patch)
-{
- /*
- * store information about incoming file deletion
- */
- while (patch) {
- if ((patch->new_name == NULL) || (patch->is_rename)) {
- struct string_list_item *item;
- item = string_list_insert(&state->fn_table, patch->old_name);
- item->util = PATH_TO_BE_DELETED;
- }
- patch = patch->next;
- }
-}
-
-static int checkout_target(struct index_state *istate,
- struct cache_entry *ce, struct stat *st)
-{
- struct checkout costate;
-
- memset(&costate, 0, sizeof(costate));
- costate.base_dir = "";
- costate.refresh_cache = 1;
- costate.istate = istate;
- if (checkout_entry(ce, &costate, NULL) || lstat(ce->name, st))
- return error(_("cannot checkout %s"), ce->name);
- return 0;
-}
-
-static struct patch *previous_patch(struct apply_state *state,
- struct patch *patch,
- int *gone)
-{
- struct patch *previous;
-
- *gone = 0;
- if (patch->is_copy || patch->is_rename)
- return NULL; /* "git" patches do not depend on the order */
-
- previous = in_fn_table(state, patch->old_name);
- if (!previous)
- return NULL;
-
- if (to_be_deleted(previous))
- return NULL; /* the deletion hasn't happened yet */
-
- if (was_deleted(previous))
- *gone = 1;
-
- return previous;
-}
-
-static int verify_index_match(const struct cache_entry *ce, struct stat *st)
-{
- if (S_ISGITLINK(ce->ce_mode)) {
- if (!S_ISDIR(st->st_mode))
- return -1;
- return 0;
- }
- return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
-}
-
-#define SUBMODULE_PATCH_WITHOUT_INDEX 1
-
-static int load_patch_target(struct apply_state *state,
- struct strbuf *buf,
- const struct cache_entry *ce,
- struct stat *st,
- const char *name,
- unsigned expected_mode)
-{
- if (state->cached || state->check_index) {
- if (read_file_or_gitlink(ce, buf))
- return error(_("failed to read %s"), name);
- } else if (name) {
- if (S_ISGITLINK(expected_mode)) {
- if (ce)
- return read_file_or_gitlink(ce, buf);
- else
- return SUBMODULE_PATCH_WITHOUT_INDEX;
- } else if (has_symlink_leading_path(name, strlen(name))) {
- return error(_("reading from '%s' beyond a symbolic link"), name);
- } else {
- if (read_old_data(st, name, buf))
- return error(_("failed to read %s"), name);
- }
- }
- return 0;
-}
-
-/*
- * We are about to apply "patch"; populate the "image" with the
- * current version we have, from the working tree or from the index,
- * depending on the situation e.g. --cached/--index. If we are
- * applying a non-git patch that incrementally updates the tree,
- * we read from the result of a previous diff.
- */
-static int load_preimage(struct apply_state *state,
- struct image *image,
- struct patch *patch, struct stat *st,
- const struct cache_entry *ce)
-{
- struct strbuf buf = STRBUF_INIT;
- size_t len;
- char *img;
- struct patch *previous;
- int status;
-
- previous = previous_patch(state, patch, &status);
- if (status)
- return error(_("path %s has been renamed/deleted"),
- patch->old_name);
- if (previous) {
- /* We have a patched copy in memory; use that. */
- strbuf_add(&buf, previous->result, previous->resultsize);
- } else {
- status = load_patch_target(state, &buf, ce, st,
- patch->old_name, patch->old_mode);
- if (status < 0)
- return status;
- else if (status == SUBMODULE_PATCH_WITHOUT_INDEX) {
- /*
- * There is no way to apply subproject
- * patch without looking at the index.
- * NEEDSWORK: shouldn't this be flagged
- * as an error???
- */
- free_fragment_list(patch->fragments);
- patch->fragments = NULL;
- } else if (status) {
- return error(_("failed to read %s"), patch->old_name);
- }
- }
-
- img = strbuf_detach(&buf, &len);
- prepare_image(image, img, len, !patch->is_binary);
- return 0;
-}
-
-static int three_way_merge(struct image *image,
- char *path,
- const unsigned char *base,
- const unsigned char *ours,
- const unsigned char *theirs)
-{
- mmfile_t base_file, our_file, their_file;
- mmbuffer_t result = { NULL };
- int status;
-
- read_mmblob(&base_file, base);
- read_mmblob(&our_file, ours);
- read_mmblob(&their_file, theirs);
- status = ll_merge(&result, path,
- &base_file, "base",
- &our_file, "ours",
- &their_file, "theirs", NULL);
- free(base_file.ptr);
- free(our_file.ptr);
- free(their_file.ptr);
- if (status < 0 || !result.ptr) {
- free(result.ptr);
- return -1;
- }
- clear_image(image);
- image->buf = result.ptr;
- image->len = result.size;
-
- return status;
-}
-
-/*
- * When directly falling back to add/add three-way merge, we read from
- * the current contents of the new_name. In no cases other than that
- * this function will be called.
- */
-static int load_current(struct apply_state *state,
- struct image *image,
- struct patch *patch)
-{
- struct strbuf buf = STRBUF_INIT;
- int status, pos;
- size_t len;
- char *img;
- struct stat st;
- struct cache_entry *ce;
- char *name = patch->new_name;
- unsigned mode = patch->new_mode;
-
- if (!patch->is_new)
- die("BUG: patch to %s is not a creation", patch->old_name);
-
- pos = cache_name_pos(name, strlen(name));
- if (pos < 0)
- return error(_("%s: does not exist in index"), name);
- ce = active_cache[pos];
- if (lstat(name, &st)) {
- if (errno != ENOENT)
- return error(_("%s: %s"), name, strerror(errno));
- if (checkout_target(&the_index, ce, &st))
- return -1;
- }
- if (verify_index_match(ce, &st))
- return error(_("%s: does not match index"), name);
-
- status = load_patch_target(state, &buf, ce, &st, name, mode);
- if (status < 0)
- return status;
- else if (status)
- return -1;
- img = strbuf_detach(&buf, &len);
- prepare_image(image, img, len, !patch->is_binary);
- return 0;
-}
-
-static int try_threeway(struct apply_state *state,
- struct image *image,
- struct patch *patch,
- struct stat *st,
- const struct cache_entry *ce)
-{
- unsigned char pre_sha1[20], post_sha1[20], our_sha1[20];
- struct strbuf buf = STRBUF_INIT;
- size_t len;
- int status;
- char *img;
- struct image tmp_image;
-
- /* No point falling back to 3-way merge in these cases */
- if (patch->is_delete ||
- S_ISGITLINK(patch->old_mode) || S_ISGITLINK(patch->new_mode))
- return -1;
-
- /* Preimage the patch was prepared for */
- if (patch->is_new)
- write_sha1_file("", 0, blob_type, pre_sha1);
- else if (get_sha1(patch->old_sha1_prefix, pre_sha1) ||
- read_blob_object(&buf, pre_sha1, patch->old_mode))
- return error("repository lacks the necessary blob to fall back on 3-way merge.");
-
- fprintf(stderr, "Falling back to three-way merge...\n");
-
- img = strbuf_detach(&buf, &len);
- prepare_image(&tmp_image, img, len, 1);
- /* Apply the patch to get the post image */
- if (apply_fragments(state, &tmp_image, patch) < 0) {
- clear_image(&tmp_image);
- return -1;
- }
- /* post_sha1[] is theirs */
- write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_sha1);
- clear_image(&tmp_image);
-
- /* our_sha1[] is ours */
- if (patch->is_new) {
- if (load_current(state, &tmp_image, patch))
- return error("cannot read the current contents of '%s'",
- patch->new_name);
- } else {
- if (load_preimage(state, &tmp_image, patch, st, ce))
- return error("cannot read the current contents of '%s'",
- patch->old_name);
- }
- write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_sha1);
- clear_image(&tmp_image);
-
- /* in-core three-way merge between post and our using pre as base */
- status = three_way_merge(image, patch->new_name,
- pre_sha1, our_sha1, post_sha1);
- if (status < 0) {
- fprintf(stderr, "Failed to fall back on three-way merge...\n");
- return status;
- }
-
- if (status) {
- patch->conflicted_threeway = 1;
- if (patch->is_new)
- oidclr(&patch->threeway_stage[0]);
- else
- hashcpy(patch->threeway_stage[0].hash, pre_sha1);
- hashcpy(patch->threeway_stage[1].hash, our_sha1);
- hashcpy(patch->threeway_stage[2].hash, post_sha1);
- fprintf(stderr, "Applied patch to '%s' with conflicts.\n", patch->new_name);
- } else {
- fprintf(stderr, "Applied patch to '%s' cleanly.\n", patch->new_name);
- }
- return 0;
-}
-
-static int apply_data(struct apply_state *state, struct patch *patch,
- struct stat *st, const struct cache_entry *ce)
-{
- struct image image;
-
- if (load_preimage(state, &image, patch, st, ce) < 0)
- return -1;
-
- if (patch->direct_to_threeway ||
- apply_fragments(state, &image, patch) < 0) {
- /* Note: with --reject, apply_fragments() returns 0 */
- if (!state->threeway || try_threeway(state, &image, patch, st, ce) < 0)
- return -1;
- }
- patch->result = image.buf;
- patch->resultsize = image.len;
- add_to_fn_table(state, patch);
- free(image.line_allocated);
-
- if (0 < patch->is_delete && patch->resultsize)
- return error(_("removal patch leaves file contents"));
-
- return 0;
-}
-
-/*
- * If "patch" that we are looking at modifies or deletes what we have,
- * we would want it not to lose any local modification we have, either
- * in the working tree or in the index.
- *
- * This also decides if a non-git patch is a creation patch or a
- * modification to an existing empty file. We do not check the state
- * of the current tree for a creation patch in this function; the caller
- * check_patch() separately makes sure (and errors out otherwise) that
- * the path the patch creates does not exist in the current tree.
- */
-static int check_preimage(struct apply_state *state,
- struct patch *patch,
- struct cache_entry **ce,
- struct stat *st)
-{
- const char *old_name = patch->old_name;
- struct patch *previous = NULL;
- int stat_ret = 0, status;
- unsigned st_mode = 0;
-
- if (!old_name)
- return 0;
-
- assert(patch->is_new <= 0);
- previous = previous_patch(state, patch, &status);
-
- if (status)
- return error(_("path %s has been renamed/deleted"), old_name);
- if (previous) {
- st_mode = previous->new_mode;
- } else if (!state->cached) {
- stat_ret = lstat(old_name, st);
- if (stat_ret && errno != ENOENT)
- return error(_("%s: %s"), old_name, strerror(errno));
- }
-
- if (state->check_index && !previous) {
- int pos = cache_name_pos(old_name, strlen(old_name));
- if (pos < 0) {
- if (patch->is_new < 0)
- goto is_new;
- return error(_("%s: does not exist in index"), old_name);
- }
- *ce = active_cache[pos];
- if (stat_ret < 0) {
- if (checkout_target(&the_index, *ce, st))
- return -1;
- }
- if (!state->cached && verify_index_match(*ce, st))
- return error(_("%s: does not match index"), old_name);
- if (state->cached)
- st_mode = (*ce)->ce_mode;
- } else if (stat_ret < 0) {
- if (patch->is_new < 0)
- goto is_new;
- return error(_("%s: %s"), old_name, strerror(errno));
- }
-
- if (!state->cached && !previous)
- st_mode = ce_mode_from_stat(*ce, st->st_mode);
-
- if (patch->is_new < 0)
- patch->is_new = 0;
- if (!patch->old_mode)
- patch->old_mode = st_mode;
- if ((st_mode ^ patch->old_mode) & S_IFMT)
- return error(_("%s: wrong type"), old_name);
- if (st_mode != patch->old_mode)
- warning(_("%s has type %o, expected %o"),
- old_name, st_mode, patch->old_mode);
- if (!patch->new_mode && !patch->is_delete)
- patch->new_mode = st_mode;
- return 0;
-
- is_new:
- patch->is_new = 1;
- patch->is_delete = 0;
- free(patch->old_name);
- patch->old_name = NULL;
- return 0;
-}
-
-
-#define EXISTS_IN_INDEX 1
-#define EXISTS_IN_WORKTREE 2
-
-static int check_to_create(struct apply_state *state,
- const char *new_name,
- int ok_if_exists)
-{
- struct stat nst;
-
- if (state->check_index &&
- cache_name_pos(new_name, strlen(new_name)) >= 0 &&
- !ok_if_exists)
- return EXISTS_IN_INDEX;
- if (state->cached)
- return 0;
-
- if (!lstat(new_name, &nst)) {
- if (S_ISDIR(nst.st_mode) || ok_if_exists)
- return 0;
- /*
- * A leading component of new_name might be a symlink
- * that is going to be removed with this patch, but
- * still pointing at somewhere that has the path.
- * In such a case, path "new_name" does not exist as
- * far as git is concerned.
- */
- if (has_symlink_leading_path(new_name, strlen(new_name)))
- return 0;
-
- return EXISTS_IN_WORKTREE;
- } else if ((errno != ENOENT) && (errno != ENOTDIR)) {
- return error("%s: %s", new_name, strerror(errno));
- }
- return 0;
-}
-
-static uintptr_t register_symlink_changes(struct apply_state *state,
- const char *path,
- uintptr_t what)
-{
- struct string_list_item *ent;
-
- ent = string_list_lookup(&state->symlink_changes, path);
- if (!ent) {
- ent = string_list_insert(&state->symlink_changes, path);
- ent->util = (void *)0;
- }
- ent->util = (void *)(what | ((uintptr_t)ent->util));
- return (uintptr_t)ent->util;
-}
-
-static uintptr_t check_symlink_changes(struct apply_state *state, const char *path)
-{
- struct string_list_item *ent;
-
- ent = string_list_lookup(&state->symlink_changes, path);
- if (!ent)
- return 0;
- return (uintptr_t)ent->util;
-}
-
-static void prepare_symlink_changes(struct apply_state *state, struct patch *patch)
-{
- for ( ; patch; patch = patch->next) {
- if ((patch->old_name && S_ISLNK(patch->old_mode)) &&
- (patch->is_rename || patch->is_delete))
- /* the symlink at patch->old_name is removed */
- register_symlink_changes(state, patch->old_name, SYMLINK_GOES_AWAY);
-
- if (patch->new_name && S_ISLNK(patch->new_mode))
- /* the symlink at patch->new_name is created or remains */
- register_symlink_changes(state, patch->new_name, SYMLINK_IN_RESULT);
- }
-}
-
-static int path_is_beyond_symlink_1(struct apply_state *state, struct strbuf *name)
-{
- do {
- unsigned int change;
-
- while (--name->len && name->buf[name->len] != '/')
- ; /* scan backwards */
- if (!name->len)
- break;
- name->buf[name->len] = '\0';
- change = check_symlink_changes(state, name->buf);
- if (change & SYMLINK_IN_RESULT)
- return 1;
- if (change & SYMLINK_GOES_AWAY)
- /*
- * This cannot be "return 0", because we may
- * see a new one created at a higher level.
- */
- continue;
-
- /* otherwise, check the preimage */
- if (state->check_index) {
- struct cache_entry *ce;
-
- ce = cache_file_exists(name->buf, name->len, ignore_case);
- if (ce && S_ISLNK(ce->ce_mode))
- return 1;
- } else {
- struct stat st;
- if (!lstat(name->buf, &st) && S_ISLNK(st.st_mode))
- return 1;
- }
- } while (1);
- return 0;
-}
-
-static int path_is_beyond_symlink(struct apply_state *state, const char *name_)
-{
- int ret;
- struct strbuf name = STRBUF_INIT;
-
- assert(*name_ != '\0');
- strbuf_addstr(&name, name_);
- ret = path_is_beyond_symlink_1(state, &name);
- strbuf_release(&name);
-
- return ret;
-}
-
-static void die_on_unsafe_path(struct patch *patch)
-{
- const char *old_name = NULL;
- const char *new_name = NULL;
- if (patch->is_delete)
- old_name = patch->old_name;
- else if (!patch->is_new && !patch->is_copy)
- old_name = patch->old_name;
- if (!patch->is_delete)
- new_name = patch->new_name;
-
- if (old_name && !verify_path(old_name))
- die(_("invalid path '%s'"), old_name);
- if (new_name && !verify_path(new_name))
- die(_("invalid path '%s'"), new_name);
-}
-
-/*
- * Check and apply the patch in-core; leave the result in patch->result
- * for the caller to write it out to the final destination.
- */
-static int check_patch(struct apply_state *state, struct patch *patch)
-{
- struct stat st;
- const char *old_name = patch->old_name;
- const char *new_name = patch->new_name;
- const char *name = old_name ? old_name : new_name;
- struct cache_entry *ce = NULL;
- struct patch *tpatch;
- int ok_if_exists;
- int status;
-
- patch->rejected = 1; /* we will drop this after we succeed */
-
- status = check_preimage(state, patch, &ce, &st);
- if (status)
- return status;
- old_name = patch->old_name;
-
- /*
- * A type-change diff is always split into a patch to delete
- * old, immediately followed by a patch to create new (see
- * diff.c::run_diff()); in such a case it is Ok that the entry
- * to be deleted by the previous patch is still in the working
- * tree and in the index.
- *
- * A patch to swap-rename between A and B would first rename A
- * to B and then rename B to A. While applying the first one,
- * the presence of B should not stop A from getting renamed to
- * B; ask to_be_deleted() about the later rename. Removal of
- * B and rename from A to B is handled the same way by asking
- * was_deleted().
- */
- if ((tpatch = in_fn_table(state, new_name)) &&
- (was_deleted(tpatch) || to_be_deleted(tpatch)))
- ok_if_exists = 1;
- else
- ok_if_exists = 0;
-
- if (new_name &&
- ((0 < patch->is_new) || patch->is_rename || patch->is_copy)) {
- int err = check_to_create(state, new_name, ok_if_exists);
-
- if (err && state->threeway) {
- patch->direct_to_threeway = 1;
- } else switch (err) {
- case 0:
- break; /* happy */
- case EXISTS_IN_INDEX:
- return error(_("%s: already exists in index"), new_name);
- break;
- case EXISTS_IN_WORKTREE:
- return error(_("%s: already exists in working directory"),
- new_name);
- default:
- return err;
- }
-
- if (!patch->new_mode) {
- if (0 < patch->is_new)
- patch->new_mode = S_IFREG | 0644;
- else
- patch->new_mode = patch->old_mode;
- }
- }
-
- if (new_name && old_name) {
- int same = !strcmp(old_name, new_name);
- if (!patch->new_mode)
- patch->new_mode = patch->old_mode;
- if ((patch->old_mode ^ patch->new_mode) & S_IFMT) {
- if (same)
- return error(_("new mode (%o) of %s does not "
- "match old mode (%o)"),
- patch->new_mode, new_name,
- patch->old_mode);
- else
- return error(_("new mode (%o) of %s does not "
- "match old mode (%o) of %s"),
- patch->new_mode, new_name,
- patch->old_mode, old_name);
- }
- }
-
- if (!state->unsafe_paths)
- die_on_unsafe_path(patch);
-
- /*
- * An attempt to read from or delete a path that is beyond a
- * symbolic link will be prevented by load_patch_target() that
- * is called at the beginning of apply_data() so we do not
- * have to worry about a patch marked with "is_delete" bit
- * here. We however need to make sure that the patch result
- * is not deposited to a path that is beyond a symbolic link
- * here.
- */
- if (!patch->is_delete && path_is_beyond_symlink(state, patch->new_name))
- return error(_("affected file '%s' is beyond a symbolic link"),
- patch->new_name);
-
- if (apply_data(state, patch, &st, ce) < 0)
- return error(_("%s: patch does not apply"), name);
- patch->rejected = 0;
- return 0;
-}
-
-static int check_patch_list(struct apply_state *state, struct patch *patch)
-{
- int err = 0;
-
- prepare_symlink_changes(state, patch);
- prepare_fn_table(state, patch);
- while (patch) {
- if (state->apply_verbosely)
- say_patch_name(stderr,
- _("Checking patch %s..."), patch);
- err |= check_patch(state, patch);
- patch = patch->next;
- }
- return err;
-}
-
-/* This function tries to read the sha1 from the current index */
-static int get_current_sha1(const char *path, unsigned char *sha1)
-{
- int pos;
-
- if (read_cache() < 0)
- return -1;
- pos = cache_name_pos(path, strlen(path));
- if (pos < 0)
- return -1;
- hashcpy(sha1, active_cache[pos]->sha1);
- return 0;
-}
-
-static int preimage_sha1_in_gitlink_patch(struct patch *p, unsigned char sha1[20])
-{
- /*
- * A usable gitlink patch has only one fragment (hunk) that looks like:
- * @@ -1 +1 @@
- * -Subproject commit <old sha1>
- * +Subproject commit <new sha1>
- * or
- * @@ -1 +0,0 @@
- * -Subproject commit <old sha1>
- * for a removal patch.
- */
- struct fragment *hunk = p->fragments;
- static const char heading[] = "-Subproject commit ";
- char *preimage;
-
- if (/* does the patch have only one hunk? */
- hunk && !hunk->next &&
- /* is its preimage one line? */
- hunk->oldpos == 1 && hunk->oldlines == 1 &&
- /* does preimage begin with the heading? */
- (preimage = memchr(hunk->patch, '\n', hunk->size)) != NULL &&
- starts_with(++preimage, heading) &&
- /* does it record full SHA-1? */
- !get_sha1_hex(preimage + sizeof(heading) - 1, sha1) &&
- preimage[sizeof(heading) + 40 - 1] == '\n' &&
- /* does the abbreviated name on the index line agree with it? */
- starts_with(preimage + sizeof(heading) - 1, p->old_sha1_prefix))
- return 0; /* it all looks fine */
-
- /* we may have full object name on the index line */
- return get_sha1_hex(p->old_sha1_prefix, sha1);
-}
-
-/* Build an index that contains the just the files needed for a 3way merge */
-static void build_fake_ancestor(struct patch *list, const char *filename)
-{
- struct patch *patch;
- struct index_state result = { NULL };
- static struct lock_file lock;
-
- /* Once we start supporting the reverse patch, it may be
- * worth showing the new sha1 prefix, but until then...
- */
- for (patch = list; patch; patch = patch->next) {
- unsigned char sha1[20];
- struct cache_entry *ce;
- const char *name;
-
- name = patch->old_name ? patch->old_name : patch->new_name;
- if (0 < patch->is_new)
- continue;
-
- if (S_ISGITLINK(patch->old_mode)) {
- if (!preimage_sha1_in_gitlink_patch(patch, sha1))
- ; /* ok, the textual part looks sane */
- else
- die("sha1 information is lacking or useless for submodule %s",
- name);
- } else if (!get_sha1_blob(patch->old_sha1_prefix, sha1)) {
- ; /* ok */
- } else if (!patch->lines_added && !patch->lines_deleted) {
- /* mode-only change: update the current */
- if (get_current_sha1(patch->old_name, sha1))
- die("mode change for %s, which is not "
- "in current HEAD", name);
- } else
- die("sha1 information is lacking or useless "
- "(%s).", name);
-
- ce = make_cache_entry(patch->old_mode, sha1, name, 0, 0);
- if (!ce)
- die(_("make_cache_entry failed for path '%s'"), name);
- if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD))
- die ("Could not add %s to temporary index", name);
- }
-
- hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR);
- if (write_locked_index(&result, &lock, COMMIT_LOCK))
- die ("Could not write temporary index to %s", filename);
-
- discard_index(&result);
-}
-
-static void stat_patch_list(struct apply_state *state, struct patch *patch)
-{
- int files, adds, dels;
-
- for (files = adds = dels = 0 ; patch ; patch = patch->next) {
- files++;
- adds += patch->lines_added;
- dels += patch->lines_deleted;
- show_stats(state, patch);
- }
-
- print_stat_summary(stdout, files, adds, dels);
-}
-
-static void numstat_patch_list(struct apply_state *state,
- struct patch *patch)
-{
- for ( ; patch; patch = patch->next) {
- const char *name;
- name = patch->new_name ? patch->new_name : patch->old_name;
- if (patch->is_binary)
- printf("-\t-\t");
- else
- printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
- write_name_quoted(name, stdout, state->line_termination);
- }
-}
-
-static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
-{
- if (mode)
- printf(" %s mode %06o %s\n", newdelete, mode, name);
- else
- printf(" %s %s\n", newdelete, name);
-}
-
-static void show_mode_change(struct patch *p, int show_name)
-{
- if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
- if (show_name)
- printf(" mode change %06o => %06o %s\n",
- p->old_mode, p->new_mode, p->new_name);
- else
- printf(" mode change %06o => %06o\n",
- p->old_mode, p->new_mode);
- }
-}
-
-static void show_rename_copy(struct patch *p)
-{
- const char *renamecopy = p->is_rename ? "rename" : "copy";
- const char *old, *new;
-
- /* Find common prefix */
- old = p->old_name;
- new = p->new_name;
- while (1) {
- const char *slash_old, *slash_new;
- slash_old = strchr(old, '/');
- slash_new = strchr(new, '/');
- if (!slash_old ||
- !slash_new ||
- slash_old - old != slash_new - new ||
- memcmp(old, new, slash_new - new))
- break;
- old = slash_old + 1;
- new = slash_new + 1;
- }
- /* p->old_name thru old is the common prefix, and old and new
- * through the end of names are renames
- */
- if (old != p->old_name)
- printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
- (int)(old - p->old_name), p->old_name,
- old, new, p->score);
- else
- printf(" %s %s => %s (%d%%)\n", renamecopy,
- p->old_name, p->new_name, p->score);
- show_mode_change(p, 0);
-}
-
-static void summary_patch_list(struct patch *patch)
-{
- struct patch *p;
-
- for (p = patch; p; p = p->next) {
- if (p->is_new)
- show_file_mode_name("create", p->new_mode, p->new_name);
- else if (p->is_delete)
- show_file_mode_name("delete", p->old_mode, p->old_name);
- else {
- if (p->is_rename || p->is_copy)
- show_rename_copy(p);
- else {
- if (p->score) {
- printf(" rewrite %s (%d%%)\n",
- p->new_name, p->score);
- show_mode_change(p, 0);
- }
- else
- show_mode_change(p, 1);
- }
- }
- }
-}
-
-static void patch_stats(struct apply_state *state, struct patch *patch)
-{
- int lines = patch->lines_added + patch->lines_deleted;
-
- if (lines > state->max_change)
- state->max_change = lines;
- if (patch->old_name) {
- int len = quote_c_style(patch->old_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->old_name);
- if (len > state->max_len)
- state->max_len = len;
- }
- if (patch->new_name) {
- int len = quote_c_style(patch->new_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->new_name);
- if (len > state->max_len)
- state->max_len = len;
- }
-}
-
-static void remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
-{
- if (state->update_index) {
- if (remove_file_from_cache(patch->old_name) < 0)
- die(_("unable to remove %s from index"), patch->old_name);
- }
- if (!state->cached) {
- if (!remove_or_warn(patch->old_mode, patch->old_name) && rmdir_empty) {
- remove_path(patch->old_name);
- }
- }
-}
-
-static void add_index_file(struct apply_state *state,
- const char *path,
- unsigned mode,
- void *buf,
- unsigned long size)
-{
- struct stat st;
- struct cache_entry *ce;
- int namelen = strlen(path);
- unsigned ce_size = cache_entry_size(namelen);
-
- if (!state->update_index)
- return;
-
- ce = xcalloc(1, ce_size);
- memcpy(ce->name, path, namelen);
- ce->ce_mode = create_ce_mode(mode);
- ce->ce_flags = create_ce_flags(0);
- ce->ce_namelen = namelen;
- if (S_ISGITLINK(mode)) {
- const char *s;
-
- if (!skip_prefix(buf, "Subproject commit ", &s) ||
- get_sha1_hex(s, ce->sha1))
- die(_("corrupt patch for submodule %s"), path);
- } else {
- if (!state->cached) {
- if (lstat(path, &st) < 0)
- die_errno(_("unable to stat newly created file '%s'"),
- path);
- fill_stat_cache_info(ce, &st);
- }
- if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
- die(_("unable to create backing store for newly created file %s"), path);
- }
- if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
- die(_("unable to add cache entry for %s"), path);
-}
-
-static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
-{
- int fd;
- struct strbuf nbuf = STRBUF_INIT;
-
- if (S_ISGITLINK(mode)) {
- struct stat st;
- if (!lstat(path, &st) && S_ISDIR(st.st_mode))
- return 0;
- return mkdir(path, 0777);
- }
-
- if (has_symlinks && S_ISLNK(mode))
- /* Although buf:size is counted string, it also is NUL
- * terminated.
- */
- return symlink(buf, path);
-
- fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
- if (fd < 0)
- return -1;
-
- if (convert_to_working_tree(path, buf, size, &nbuf)) {
- size = nbuf.len;
- buf = nbuf.buf;
- }
- write_or_die(fd, buf, size);
- strbuf_release(&nbuf);
-
- if (close(fd) < 0)
- die_errno(_("closing file '%s'"), path);
- return 0;
-}
-
-/*
- * We optimistically assume that the directories exist,
- * which is true 99% of the time anyway. If they don't,
- * we create them and try again.
- */
-static void create_one_file(struct apply_state *state,
- char *path,
- unsigned mode,
- const char *buf,
- unsigned long size)
-{
- if (state->cached)
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
-
- if (errno == ENOENT) {
- if (safe_create_leading_directories(path))
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
- }
-
- if (errno == EEXIST || errno == EACCES) {
- /* We may be trying to create a file where a directory
- * used to be.
- */
- struct stat st;
- if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
- errno = EEXIST;
- }
-
- if (errno == EEXIST) {
- unsigned int nr = getpid();
-
- for (;;) {
- char newpath[PATH_MAX];
- mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
- if (!try_create_file(newpath, mode, buf, size)) {
- if (!rename(newpath, path))
- return;
- unlink_or_warn(newpath);
- break;
- }
- if (errno != EEXIST)
- break;
- ++nr;
- }
- }
- die_errno(_("unable to write file '%s' mode %o"), path, mode);
-}
-
-static void add_conflicted_stages_file(struct apply_state *state,
- struct patch *patch)
-{
- int stage, namelen;
- unsigned ce_size, mode;
- struct cache_entry *ce;
-
- if (!state->update_index)
- return;
- namelen = strlen(patch->new_name);
- ce_size = cache_entry_size(namelen);
- mode = patch->new_mode ? patch->new_mode : (S_IFREG | 0644);
-
- remove_file_from_cache(patch->new_name);
- for (stage = 1; stage < 4; stage++) {
- if (is_null_oid(&patch->threeway_stage[stage - 1]))
- continue;
- ce = xcalloc(1, ce_size);
- memcpy(ce->name, patch->new_name, namelen);
- ce->ce_mode = create_ce_mode(mode);
- ce->ce_flags = create_ce_flags(stage);
- ce->ce_namelen = namelen;
- hashcpy(ce->sha1, patch->threeway_stage[stage - 1].hash);
- if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
- die(_("unable to add cache entry for %s"), patch->new_name);
- }
-}
-
-static void create_file(struct apply_state *state, struct patch *patch)
-{
- char *path = patch->new_name;
- unsigned mode = patch->new_mode;
- unsigned long size = patch->resultsize;
- char *buf = patch->result;
-
- if (!mode)
- mode = S_IFREG | 0644;
- create_one_file(state, path, mode, buf, size);
-
- if (patch->conflicted_threeway)
- add_conflicted_stages_file(state, patch);
- else
- add_index_file(state, path, mode, buf, size);
-}
-
-/* phase zero is to remove, phase one is to create */
-static void write_out_one_result(struct apply_state *state,
- struct patch *patch,
- int phase)
-{
- if (patch->is_delete > 0) {
- if (phase == 0)
- remove_file(state, patch, 1);
- return;
- }
- if (patch->is_new > 0 || patch->is_copy) {
- if (phase == 1)
- create_file(state, patch);
- return;
- }
- /*
- * Rename or modification boils down to the same
- * thing: remove the old, write the new
- */
- if (phase == 0)
- remove_file(state, patch, patch->is_rename);
- if (phase == 1)
- create_file(state, patch);
-}
-
-static int write_out_one_reject(struct apply_state *state, struct patch *patch)
-{
- FILE *rej;
- char namebuf[PATH_MAX];
- struct fragment *frag;
- int cnt = 0;
- struct strbuf sb = STRBUF_INIT;
-
- for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
- if (!frag->rejected)
- continue;
- cnt++;
- }
-
- if (!cnt) {
- if (state->apply_verbosely)
- say_patch_name(stderr,
- _("Applied patch %s cleanly."), patch);
- return 0;
- }
-
- /* This should not happen, because a removal patch that leaves
- * contents are marked "rejected" at the patch level.
- */
- if (!patch->new_name)
- die(_("internal error"));
-
- /* Say this even without --verbose */
- strbuf_addf(&sb, Q_("Applying patch %%s with %d reject...",
- "Applying patch %%s with %d rejects...",
- cnt),
- cnt);
- say_patch_name(stderr, sb.buf, patch);
- strbuf_release(&sb);
-
- cnt = strlen(patch->new_name);
- if (ARRAY_SIZE(namebuf) <= cnt + 5) {
- cnt = ARRAY_SIZE(namebuf) - 5;
- warning(_("truncating .rej filename to %.*s.rej"),
- cnt - 1, patch->new_name);
- }
- memcpy(namebuf, patch->new_name, cnt);
- memcpy(namebuf + cnt, ".rej", 5);
-
- rej = fopen(namebuf, "w");
- if (!rej)
- return error(_("cannot open %s: %s"), namebuf, strerror(errno));
-
- /* Normal git tools never deal with .rej, so do not pretend
- * this is a git patch by saying --git or giving extended
- * headers. While at it, maybe please "kompare" that wants
- * the trailing TAB and some garbage at the end of line ;-).
- */
- fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
- patch->new_name, patch->new_name);
- for (cnt = 1, frag = patch->fragments;
- frag;
- cnt++, frag = frag->next) {
- if (!frag->rejected) {
- fprintf_ln(stderr, _("Hunk #%d applied cleanly."), cnt);
- continue;
- }
- fprintf_ln(stderr, _("Rejected hunk #%d."), cnt);
- fprintf(rej, "%.*s", frag->size, frag->patch);
- if (frag->patch[frag->size-1] != '\n')
- fputc('\n', rej);
- }
- fclose(rej);
- return -1;
-}
-
-static int write_out_results(struct apply_state *state, struct patch *list)
-{
- int phase;
- int errs = 0;
- struct patch *l;
- struct string_list cpath = STRING_LIST_INIT_DUP;
-
- for (phase = 0; phase < 2; phase++) {
- l = list;
- while (l) {
- if (l->rejected)
- errs = 1;
- else {
- write_out_one_result(state, l, phase);
- if (phase == 1) {
- if (write_out_one_reject(state, l))
- errs = 1;
- if (l->conflicted_threeway) {
- string_list_append(&cpath, l->new_name);
- errs = 1;
- }
- }
- }
- l = l->next;
- }
- }
-
- if (cpath.nr) {
- struct string_list_item *item;
-
- string_list_sort(&cpath);
- for_each_string_list_item(item, &cpath)
- fprintf(stderr, "U %s\n", item->string);
- string_list_clear(&cpath, 0);
-
- rerere(0);
- }
-
- return errs;
-}
-
static struct lock_file lock_file;
-#define INACCURATE_EOF (1<<0)
-#define RECOUNT (1<<1)
-
-static int apply_patch(struct apply_state *state,
- int fd,
- const char *filename,
- int options)
-{
- size_t offset;
- struct strbuf buf = STRBUF_INIT; /* owns the patch text */
- struct patch *list = NULL, **listp = &list;
- int skipped_patch = 0;
-
- state->patch_input_file = filename;
- read_patch_file(&buf, fd);
- offset = 0;
- while (offset < buf.len) {
- struct patch *patch;
- int nr;
-
- patch = xcalloc(1, sizeof(*patch));
- patch->inaccurate_eof = !!(options & INACCURATE_EOF);
- patch->recount = !!(options & RECOUNT);
- nr = parse_chunk(state, buf.buf + offset, buf.len - offset, patch);
- if (nr < 0) {
- free_patch(patch);
- break;
- }
- if (state->apply_in_reverse)
- reverse_patches(patch);
- if (use_patch(state, patch)) {
- patch_stats(state, patch);
- *listp = patch;
- listp = &patch->next;
- }
- else {
- if (state->apply_verbosely)
- say_patch_name(stderr, _("Skipped patch '%s'."), patch);
- free_patch(patch);
- skipped_patch++;
- }
- offset += nr;
- }
-
- if (!list && !skipped_patch)
- die(_("unrecognized input"));
-
- if (state->whitespace_error && (state->ws_error_action == die_on_ws_error))
- state->apply = 0;
-
- state->update_index = state->check_index && state->apply;
- if (state->update_index && state->newfd < 0)
- state->newfd = hold_locked_index(state->lock_file, 1);
-
- if (state->check_index) {
- if (read_cache() < 0)
- die(_("unable to read index file"));
- }
-
- if ((state->check || state->apply) &&
- check_patch_list(state, list) < 0 &&
- !state->apply_with_reject)
- exit(1);
-
- if (state->apply && write_out_results(state, list)) {
- if (state->apply_with_reject)
- exit(1);
- /* with --3way, we still need to write the index out */
- return 1;
- }
-
- if (state->fake_ancestor)
- build_fake_ancestor(list, state->fake_ancestor);
-
- if (state->diffstat)
- stat_patch_list(state, list);
-
- if (state->numstat)
- numstat_patch_list(state, list);
-
- if (state->summary)
- summary_patch_list(list);
-
- free_patch_list(list);
- strbuf_release(&buf);
- string_list_clear(&state->fn_table, 0);
- return 0;
-}
-
-static void git_apply_config(void)
-{
- git_config_get_string_const("apply.whitespace", &apply_default_whitespace);
- git_config_get_string_const("apply.ignorewhitespace", &apply_default_ignorewhitespace);
- git_config(git_default_config, NULL);
-}
-
-static int option_parse_exclude(const struct option *opt,
- const char *arg, int unset)
-{
- struct apply_state *state = opt->value;
- add_name_limit(state, arg, 1);
- return 0;
-}
-
-static int option_parse_include(const struct option *opt,
- const char *arg, int unset)
-{
- struct apply_state *state = opt->value;
- add_name_limit(state, arg, 0);
- state->has_include = 1;
- return 0;
-}
-
-static int option_parse_p(const struct option *opt,
- const char *arg,
- int unset)
-{
- struct apply_state *state = opt->value;
- state->p_value = atoi(arg);
- state->p_value_known = 1;
- return 0;
-}
-
-static int option_parse_space_change(const struct option *opt,
- const char *arg, int unset)
-{
- struct apply_state *state = opt->value;
- if (unset)
- state->ws_ignore_action = ignore_ws_none;
- else
- state->ws_ignore_action = ignore_ws_change;
- return 0;
-}
-
-static int option_parse_whitespace(const struct option *opt,
- const char *arg, int unset)
-{
- struct apply_state *state = opt->value;
- state->whitespace_option = arg;
- parse_whitespace_option(state, arg);
- return 0;
-}
-
-static int option_parse_directory(const struct option *opt,
- const char *arg, int unset)
-{
- struct apply_state *state = opt->value;
- strbuf_reset(&state->root);
- strbuf_addstr(&state->root, arg);
- strbuf_complete(&state->root, '/');
- return 0;
-}
-
-static void init_apply_state(struct apply_state *state,
- const char *prefix,
- struct lock_file *lock_file)
-{
- memset(state, 0, sizeof(*state));
- state->prefix = prefix;
- state->prefix_length = state->prefix ? strlen(state->prefix) : 0;
- state->lock_file = lock_file;
- state->newfd = -1;
- state->apply = 1;
- state->line_termination = '\n';
- state->p_value = 1;
- state->p_context = UINT_MAX;
- state->squelch_whitespace_errors = 5;
- state->ws_error_action = warn_on_ws_error;
- state->ws_ignore_action = ignore_ws_none;
- state->linenr = 1;
- string_list_init(&state->fn_table, 0);
- string_list_init(&state->limit_by_name, 0);
- string_list_init(&state->symlink_changes, 0);
- strbuf_init(&state->root, 0);
-
- git_apply_config();
- if (apply_default_whitespace)
- parse_whitespace_option(state, apply_default_whitespace);
- if (apply_default_ignorewhitespace)
- parse_ignorewhitespace_option(state, apply_default_ignorewhitespace);
-}
-
-static void clear_apply_state(struct apply_state *state)
-{
- string_list_clear(&state->limit_by_name, 0);
- string_list_clear(&state->symlink_changes, 0);
- strbuf_release(&state->root);
-
- /* &state->fn_table is cleared at the end of apply_patch() */
-}
-
-static void check_apply_state(struct apply_state *state, int force_apply)
-{
- int is_not_gitdir = !startup_info->have_repository;
-
- if (state->apply_with_reject && state->threeway)
- die("--reject and --3way cannot be used together.");
- if (state->cached && state->threeway)
- die("--cached and --3way cannot be used together.");
- if (state->threeway) {
- if (is_not_gitdir)
- die(_("--3way outside a repository"));
- state->check_index = 1;
- }
- if (state->apply_with_reject)
- state->apply = state->apply_verbosely = 1;
- if (!force_apply && (state->diffstat || state->numstat || state->summary || state->check || state->fake_ancestor))
- state->apply = 0;
- if (state->check_index && is_not_gitdir)
- die(_("--index outside a repository"));
- if (state->cached) {
- if (is_not_gitdir)
- die(_("--cached outside a repository"));
- state->check_index = 1;
- }
- if (state->check_index)
- state->unsafe_paths = 0;
- if (!state->lock_file)
- die("BUG: state->lock_file should not be NULL");
-}
-
-static int apply_all_patches(struct apply_state *state,
- int argc,
- const char **argv,
- int options)
-{
- int i;
- int errs = 0;
- int read_stdin = 1;
-
- for (i = 0; i < argc; i++) {
- const char *arg = argv[i];
- int fd;
-
- if (!strcmp(arg, "-")) {
- errs |= apply_patch(state, 0, "<stdin>", options);
- read_stdin = 0;
- continue;
- } else if (0 < state->prefix_length)
- arg = prefix_filename(state->prefix,
- state->prefix_length,
- arg);
-
- fd = open(arg, O_RDONLY);
- if (fd < 0)
- die_errno(_("can't open patch '%s'"), arg);
- read_stdin = 0;
- set_default_whitespace_mode(state);
- errs |= apply_patch(state, fd, arg, options);
- close(fd);
- }
- set_default_whitespace_mode(state);
- if (read_stdin)
- errs |= apply_patch(state, 0, "<stdin>", options);
-
- if (state->whitespace_error) {
- if (state->squelch_whitespace_errors &&
- state->squelch_whitespace_errors < state->whitespace_error) {
- int squelched =
- state->whitespace_error - state->squelch_whitespace_errors;
- warning(Q_("squelched %d whitespace error",
- "squelched %d whitespace errors",
- squelched),
- squelched);
- }
- if (state->ws_error_action == die_on_ws_error)
- die(Q_("%d line adds whitespace errors.",
- "%d lines add whitespace errors.",
- state->whitespace_error),
- state->whitespace_error);
- if (state->applied_after_fixing_ws && state->apply)
- warning("%d line%s applied after"
- " fixing whitespace errors.",
- state->applied_after_fixing_ws,
- state->applied_after_fixing_ws == 1 ? "" : "s");
- else if (state->whitespace_error)
- warning(Q_("%d line adds whitespace errors.",
- "%d lines add whitespace errors.",
- state->whitespace_error),
- state->whitespace_error);
- }
-
- if (state->update_index) {
- if (write_locked_index(&the_index, state->lock_file, COMMIT_LOCK))
- die(_("Unable to write new index file"));
- state->newfd = -1;
- }
-
- return !!errs;
-}
-
int cmd_apply(int argc, const char **argv, const char *prefix)
{
int force_apply = 0;
@@ -4795,81 +18,15 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
int ret;
struct apply_state state;
- struct option builtin_apply_options[] = {
- { OPTION_CALLBACK, 0, "exclude", &state, N_("path"),
- N_("don't apply changes matching the given path"),
- 0, option_parse_exclude },
- { OPTION_CALLBACK, 0, "include", &state, N_("path"),
- N_("apply changes matching the given path"),
- 0, option_parse_include },
- { OPTION_CALLBACK, 'p', NULL, &state, N_("num"),
- N_("remove <num> leading slashes from traditional diff paths"),
- 0, option_parse_p },
- OPT_BOOL(0, "no-add", &state.no_add,
- N_("ignore additions made by the patch")),
- OPT_BOOL(0, "stat", &state.diffstat,
- N_("instead of applying the patch, output diffstat for the input")),
- OPT_NOOP_NOARG(0, "allow-binary-replacement"),
- OPT_NOOP_NOARG(0, "binary"),
- OPT_BOOL(0, "numstat", &state.numstat,
- N_("show number of added and deleted lines in decimal notation")),
- OPT_BOOL(0, "summary", &state.summary,
- N_("instead of applying the patch, output a summary for the input")),
- OPT_BOOL(0, "check", &state.check,
- N_("instead of applying the patch, see if the patch is applicable")),
- OPT_BOOL(0, "index", &state.check_index,
- N_("make sure the patch is applicable to the current index")),
- OPT_BOOL(0, "cached", &state.cached,
- N_("apply a patch without touching the working tree")),
- OPT_BOOL(0, "unsafe-paths", &state.unsafe_paths,
- N_("accept a patch that touches outside the working area")),
- OPT_BOOL(0, "apply", &force_apply,
- N_("also apply the patch (use with --stat/--summary/--check)")),
- OPT_BOOL('3', "3way", &state.threeway,
- N_( "attempt three-way merge if a patch does not apply")),
- OPT_FILENAME(0, "build-fake-ancestor", &state.fake_ancestor,
- N_("build a temporary index based on embedded index information")),
- /* Think twice before adding "--nul" synonym to this */
- OPT_SET_INT('z', NULL, &state.line_termination,
- N_("paths are separated with NUL character"), '\0'),
- OPT_INTEGER('C', NULL, &state.p_context,
- N_("ensure at least <n> lines of context match")),
- { OPTION_CALLBACK, 0, "whitespace", &state, N_("action"),
- N_("detect new or modified lines that have whitespace errors"),
- 0, option_parse_whitespace },
- { OPTION_CALLBACK, 0, "ignore-space-change", &state, NULL,
- N_("ignore changes in whitespace when finding context"),
- PARSE_OPT_NOARG, option_parse_space_change },
- { OPTION_CALLBACK, 0, "ignore-whitespace", &state, NULL,
- N_("ignore changes in whitespace when finding context"),
- PARSE_OPT_NOARG, option_parse_space_change },
- OPT_BOOL('R', "reverse", &state.apply_in_reverse,
- N_("apply the patch in reverse")),
- OPT_BOOL(0, "unidiff-zero", &state.unidiff_zero,
- N_("don't expect at least one line of context")),
- OPT_BOOL(0, "reject", &state.apply_with_reject,
- N_("leave the rejected hunks in corresponding *.rej files")),
- OPT_BOOL(0, "allow-overlap", &state.allow_overlap,
- N_("allow overlapping hunks")),
- OPT__VERBOSE(&state.apply_verbosely, N_("be verbose")),
- OPT_BIT(0, "inaccurate-eof", &options,
- N_("tolerate incorrectly detected missing new-line at the end of file"),
- INACCURATE_EOF),
- OPT_BIT(0, "recount", &options,
- N_("do not trust the line counts in the hunk headers"),
- RECOUNT),
- { OPTION_CALLBACK, 0, "directory", &state, N_("root"),
- N_("prepend <root> to all filenames"),
- 0, option_parse_directory },
- OPT_END()
- };
-
- init_apply_state(&state, prefix, &lock_file);
+ if (init_apply_state(&state, prefix, &lock_file))
+ exit(128);
- argc = parse_options(argc, argv, state.prefix, builtin_apply_options,
- apply_usage, 0);
+ argc = apply_parse_options(argc, argv,
+ &state, &force_apply, &options,
+ apply_usage);
- check_apply_state(&state, force_apply);
+ if (check_apply_state(&state, force_apply))
+ exit(128);
ret = apply_all_patches(&state, argc, argv, options);
diff --git a/git-compat-util.h b/git-compat-util.h
index 68615b1a6a..37cce0746f 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -441,6 +441,9 @@ static inline int const_error(void)
extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
extern void set_error_routine(void (*routine)(const char *err, va_list params));
+extern void (*get_error_routine(void))(const char *err, va_list params);
+extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
+extern void (*get_warn_routine(void))(const char *warn, va_list params);
extern void set_die_is_recursing_routine(int (*routine)(void));
extern void set_error_handle(FILE *);
diff --git a/t/t4012-diff-binary.sh b/t/t4012-diff-binary.sh
index 643d729157..0a8af76aab 100755
--- a/t/t4012-diff-binary.sh
+++ b/t/t4012-diff-binary.sh
@@ -68,7 +68,7 @@ test_expect_success C_LOCALE_OUTPUT 'apply detecting corrupt patch correctly' '
sed -e "s/-CIT/xCIT/" <output >broken &&
test_must_fail git apply --stat --summary broken 2>detected &&
detected=$(cat detected) &&
- detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+ detected=$(expr "$detected" : "error.*at line \\([0-9]*\\)\$") &&
detected=$(sed -ne "${detected}p" broken) &&
test "$detected" = xCIT
'
@@ -77,7 +77,7 @@ test_expect_success C_LOCALE_OUTPUT 'apply detecting corrupt patch correctly' '
git diff --binary | sed -e "s/-CIT/xCIT/" >broken &&
test_must_fail git apply --stat --summary broken 2>detected &&
detected=$(cat detected) &&
- detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+ detected=$(expr "$detected" : "error.*at line \\([0-9]*\\)\$") &&
detected=$(sed -ne "${detected}p" broken) &&
test "$detected" = xCIT
'
diff --git a/t/t4254-am-corrupt.sh b/t/t4254-am-corrupt.sh
index 85716dd6ec..9bd7dd2ba1 100755
--- a/t/t4254-am-corrupt.sh
+++ b/t/t4254-am-corrupt.sh
@@ -29,7 +29,7 @@ test_expect_success 'try to apply corrupted patch' '
'
test_expect_success 'compare diagnostic; ensure file is still here' '
- echo "fatal: git diff header lacks filename information (line 4)" >expected &&
+ echo "error: git diff header lacks filename information (line 4)" >expected &&
test_path_is_file f &&
test_cmp expected actual
'
diff --git a/usage.c b/usage.c
index 0efa3faf60..17f52c1b5c 100644
--- a/usage.c
+++ b/usage.c
@@ -70,6 +70,21 @@ void set_error_routine(void (*routine)(const char *err, va_list params))
error_routine = routine;
}
+void (*get_error_routine(void))(const char *err, va_list params)
+{
+ return error_routine;
+}
+
+void set_warn_routine(void (*routine)(const char *warn, va_list params))
+{
+ warn_routine = routine;
+}
+
+void (*get_warn_routine(void))(const char *warn, va_list params)
+{
+ return warn_routine;
+}
+
void set_die_is_recursing_routine(int (*routine)(void))
{
die_is_recursing = routine;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 03:23:29 +0000