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-rw-r--r--vcs-svn/LICENSE3
-rw-r--r--vcs-svn/fast_export.c256
-rw-r--r--vcs-svn/fast_export.h26
-rw-r--r--vcs-svn/line_buffer.c6
-rw-r--r--vcs-svn/line_buffer.h2
-rw-r--r--vcs-svn/obj_pool.h61
-rw-r--r--vcs-svn/repo_tree.c330
-rw-r--r--vcs-svn/repo_tree.h12
-rw-r--r--vcs-svn/sliding_window.c79
-rw-r--r--vcs-svn/sliding_window.h18
-rw-r--r--vcs-svn/string_pool.c102
-rw-r--r--vcs-svn/string_pool.h11
-rw-r--r--vcs-svn/string_pool.txt43
-rw-r--r--vcs-svn/svndiff.c308
-rw-r--r--vcs-svn/svndiff.h10
-rw-r--r--vcs-svn/svndump.c138
-rw-r--r--vcs-svn/trp.h237
-rw-r--r--vcs-svn/trp.txt109
18 files changed, 807 insertions, 944 deletions
diff --git a/vcs-svn/LICENSE b/vcs-svn/LICENSE
index 0a5e3c43a0..eb91858b82 100644
--- a/vcs-svn/LICENSE
+++ b/vcs-svn/LICENSE
@@ -1,8 +1,7 @@
Copyright (C) 2010 David Barr <david.barr@cordelta.com>.
All rights reserved.
-Copyright (C) 2008 Jason Evans <jasone@canonware.com>.
-All rights reserved.
+Copyright (C) 2010 Jonathan Nieder <jrnieder@gmail.com>.
Copyright (C) 2005 Stefan Hegny, hydrografix Consulting GmbH,
Frankfurt/Main, Germany
diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
index 99ed70b88a..b823b8519c 100644
--- a/vcs-svn/fast_export.c
+++ b/vcs-svn/fast_export.c
@@ -4,34 +4,77 @@
*/
#include "git-compat-util.h"
+#include "strbuf.h"
+#include "quote.h"
#include "fast_export.h"
-#include "line_buffer.h"
#include "repo_tree.h"
-#include "string_pool.h"
+#include "strbuf.h"
+#include "svndiff.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
#define MAX_GITSVN_LINE_LEN 4096
static uint32_t first_commit_done;
+static struct line_buffer postimage = LINE_BUFFER_INIT;
+static struct line_buffer report_buffer = LINE_BUFFER_INIT;
+
+/* NEEDSWORK: move to fast_export_init() */
+static int init_postimage(void)
+{
+ static int postimage_initialized;
+ if (postimage_initialized)
+ return 0;
+ postimage_initialized = 1;
+ return buffer_tmpfile_init(&postimage);
+}
+
+void fast_export_init(int fd)
+{
+ first_commit_done = 0;
+ if (buffer_fdinit(&report_buffer, fd))
+ die_errno("cannot read from file descriptor %d", fd);
+}
+
+void fast_export_deinit(void)
+{
+ if (buffer_deinit(&report_buffer))
+ die_errno("error closing fast-import feedback stream");
+}
+
+void fast_export_reset(void)
+{
+ buffer_reset(&report_buffer);
+}
-void fast_export_delete(uint32_t depth, uint32_t *path)
+void fast_export_delete(const char *path)
{
putchar('D');
putchar(' ');
- pool_print_seq(depth, path, '/', stdout);
+ quote_c_style(path, NULL, stdout, 0);
putchar('\n');
}
-void fast_export_modify(uint32_t depth, uint32_t *path, uint32_t mode,
- uint32_t mark)
+static void fast_export_truncate(const char *path, uint32_t mode)
+{
+ fast_export_modify(path, mode, "inline");
+ printf("data 0\n\n");
+}
+
+void fast_export_modify(const char *path, uint32_t mode, const char *dataref)
{
/* Mode must be 100644, 100755, 120000, or 160000. */
- printf("M %06"PRIo32" :%"PRIu32" ", mode, mark);
- pool_print_seq(depth, path, '/', stdout);
+ if (!dataref) {
+ fast_export_truncate(path, mode);
+ return;
+ }
+ printf("M %06"PRIo32" %s ", mode, dataref);
+ quote_c_style(path, NULL, stdout, 0);
putchar('\n');
}
static char gitsvnline[MAX_GITSVN_LINE_LEN];
-void fast_export_commit(uint32_t revision, const char *author,
+void fast_export_begin_commit(uint32_t revision, const char *author,
const struct strbuf *log,
const char *uuid, const char *url,
unsigned long timestamp)
@@ -47,6 +90,7 @@ void fast_export_commit(uint32_t revision, const char *author,
*gitsvnline = '\0';
}
printf("commit refs/heads/master\n");
+ printf("mark :%"PRIu32"\n", revision);
printf("committer %s <%s@%s> %ld +0000\n",
*author ? author : "nobody",
*author ? author : "nobody",
@@ -57,15 +101,44 @@ void fast_export_commit(uint32_t revision, const char *author,
printf("%s\n", gitsvnline);
if (!first_commit_done) {
if (revision > 1)
- printf("from refs/heads/master^0\n");
+ printf("from :%"PRIu32"\n", revision - 1);
first_commit_done = 1;
}
- repo_diff(revision - 1, revision);
- fputc('\n', stdout);
+}
+void fast_export_end_commit(uint32_t revision)
+{
printf("progress Imported commit %"PRIu32".\n\n", revision);
}
+static void ls_from_rev(uint32_t rev, const char *path)
+{
+ /* ls :5 path/to/old/file */
+ printf("ls :%"PRIu32" ", rev);
+ quote_c_style(path, NULL, stdout, 0);
+ putchar('\n');
+ fflush(stdout);
+}
+
+static void ls_from_active_commit(const char *path)
+{
+ /* ls "path/to/file" */
+ printf("ls \"");
+ quote_c_style(path, NULL, stdout, 1);
+ printf("\"\n");
+ fflush(stdout);
+}
+
+static const char *get_response_line(void)
+{
+ const char *line = buffer_read_line(&report_buffer);
+ if (line)
+ return line;
+ if (buffer_ferror(&report_buffer))
+ die_errno("error reading from fast-import");
+ die("unexpected end of fast-import feedback");
+}
+
static void die_short_read(struct line_buffer *input)
{
if (buffer_ferror(input))
@@ -73,16 +146,171 @@ static void die_short_read(struct line_buffer *input)
die("invalid dump: unexpected end of file");
}
-void fast_export_blob(uint32_t mode, uint32_t mark, uint32_t len, struct line_buffer *input)
+static int ends_with(const char *s, size_t len, const char *suffix)
{
+ const size_t suffixlen = strlen(suffix);
+ if (len < suffixlen)
+ return 0;
+ return !memcmp(s + len - suffixlen, suffix, suffixlen);
+}
+
+static int parse_cat_response_line(const char *header, off_t *len)
+{
+ size_t headerlen = strlen(header);
+ uintmax_t n;
+ const char *type;
+ const char *end;
+
+ if (ends_with(header, headerlen, " missing"))
+ return error("cat-blob reports missing blob: %s", header);
+ type = memmem(header, headerlen, " blob ", strlen(" blob "));
+ if (!type)
+ return error("cat-blob header has wrong object type: %s", header);
+ n = strtoumax(type + strlen(" blob "), (char **) &end, 10);
+ if (end == type + strlen(" blob "))
+ return error("cat-blob header does not contain length: %s", header);
+ if (memchr(type + strlen(" blob "), '-', end - type - strlen(" blob ")))
+ return error("cat-blob header contains negative length: %s", header);
+ if (n == UINTMAX_MAX || n > maximum_signed_value_of_type(off_t))
+ return error("blob too large for current definition of off_t");
+ *len = n;
+ if (*end)
+ return error("cat-blob header contains garbage after length: %s", header);
+ return 0;
+}
+
+static void check_preimage_overflow(off_t a, off_t b)
+{
+ if (signed_add_overflows(a, b))
+ die("blob too large for current definition of off_t");
+}
+
+static long apply_delta(off_t len, struct line_buffer *input,
+ const char *old_data, uint32_t old_mode)
+{
+ long ret;
+ struct sliding_view preimage = SLIDING_VIEW_INIT(&report_buffer, 0);
+ FILE *out;
+
+ if (init_postimage() || !(out = buffer_tmpfile_rewind(&postimage)))
+ die("cannot open temporary file for blob retrieval");
+ if (old_data) {
+ const char *response;
+ printf("cat-blob %s\n", old_data);
+ fflush(stdout);
+ response = get_response_line();
+ if (parse_cat_response_line(response, &preimage.max_off))
+ die("invalid cat-blob response: %s", response);
+ check_preimage_overflow(preimage.max_off, 1);
+ }
+ if (old_mode == REPO_MODE_LNK) {
+ strbuf_addstr(&preimage.buf, "link ");
+ check_preimage_overflow(preimage.max_off, strlen("link "));
+ preimage.max_off += strlen("link ");
+ check_preimage_overflow(preimage.max_off, 1);
+ }
+ if (svndiff0_apply(input, len, &preimage, out))
+ die("cannot apply delta");
+ if (old_data) {
+ /* Read the remainder of preimage and trailing newline. */
+ assert(!signed_add_overflows(preimage.max_off, 1));
+ preimage.max_off++; /* room for newline */
+ if (move_window(&preimage, preimage.max_off - 1, 1))
+ die("cannot seek to end of input");
+ if (preimage.buf.buf[0] != '\n')
+ die("missing newline after cat-blob response");
+ }
+ ret = buffer_tmpfile_prepare_to_read(&postimage);
+ if (ret < 0)
+ die("cannot read temporary file for blob retrieval");
+ strbuf_release(&preimage.buf);
+ return ret;
+}
+
+void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input)
+{
+ assert(len >= 0);
if (mode == REPO_MODE_LNK) {
/* svn symlink blobs start with "link " */
+ if (len < 5)
+ die("invalid dump: symlink too short for \"link\" prefix");
len -= 5;
if (buffer_skip_bytes(input, 5) != 5)
die_short_read(input);
}
- printf("blob\nmark :%"PRIu32"\ndata %"PRIu32"\n", mark, len);
+ printf("data %"PRIuMAX"\n", (uintmax_t) len);
if (buffer_copy_bytes(input, len) != len)
die_short_read(input);
fputc('\n', stdout);
}
+
+static int parse_ls_response(const char *response, uint32_t *mode,
+ struct strbuf *dataref)
+{
+ const char *tab;
+ const char *response_end;
+
+ assert(response);
+ response_end = response + strlen(response);
+
+ if (*response == 'm') { /* Missing. */
+ errno = ENOENT;
+ return -1;
+ }
+
+ /* Mode. */
+ if (response_end - response < strlen("100644") ||
+ response[strlen("100644")] != ' ')
+ die("invalid ls response: missing mode: %s", response);
+ *mode = 0;
+ for (; *response != ' '; response++) {
+ char ch = *response;
+ if (ch < '0' || ch > '7')
+ die("invalid ls response: mode is not octal: %s", response);
+ *mode *= 8;
+ *mode += ch - '0';
+ }
+
+ /* ' blob ' or ' tree ' */
+ if (response_end - response < strlen(" blob ") ||
+ (response[1] != 'b' && response[1] != 't'))
+ die("unexpected ls response: not a tree or blob: %s", response);
+ response += strlen(" blob ");
+
+ /* Dataref. */
+ tab = memchr(response, '\t', response_end - response);
+ if (!tab)
+ die("invalid ls response: missing tab: %s", response);
+ strbuf_add(dataref, response, tab - response);
+ return 0;
+}
+
+int fast_export_ls_rev(uint32_t rev, const char *path,
+ uint32_t *mode, struct strbuf *dataref)
+{
+ ls_from_rev(rev, path);
+ return parse_ls_response(get_response_line(), mode, dataref);
+}
+
+int fast_export_ls(const char *path, uint32_t *mode, struct strbuf *dataref)
+{
+ ls_from_active_commit(path);
+ return parse_ls_response(get_response_line(), mode, dataref);
+}
+
+void fast_export_blob_delta(uint32_t mode,
+ uint32_t old_mode, const char *old_data,
+ off_t len, struct line_buffer *input)
+{
+ long postimage_len;
+
+ assert(len >= 0);
+ postimage_len = apply_delta(len, input, old_data, old_mode);
+ if (mode == REPO_MODE_LNK) {
+ buffer_skip_bytes(&postimage, strlen("link "));
+ postimage_len -= strlen("link ");
+ }
+ printf("data %ld\n", postimage_len);
+ buffer_copy_bytes(&postimage, postimage_len);
+ fputc('\n', stdout);
+}
diff --git a/vcs-svn/fast_export.h b/vcs-svn/fast_export.h
index 33a8fe996f..aa629f54ff 100644
--- a/vcs-svn/fast_export.h
+++ b/vcs-svn/fast_export.h
@@ -1,16 +1,28 @@
#ifndef FAST_EXPORT_H_
#define FAST_EXPORT_H_
-#include "line_buffer.h"
struct strbuf;
+struct line_buffer;
-void fast_export_delete(uint32_t depth, uint32_t *path);
-void fast_export_modify(uint32_t depth, uint32_t *path, uint32_t mode,
- uint32_t mark);
-void fast_export_commit(uint32_t revision, const char *author,
+void fast_export_init(int fd);
+void fast_export_deinit(void);
+void fast_export_reset(void);
+
+void fast_export_delete(const char *path);
+void fast_export_modify(const char *path, uint32_t mode, const char *dataref);
+void fast_export_begin_commit(uint32_t revision, const char *author,
const struct strbuf *log, const char *uuid,
const char *url, unsigned long timestamp);
-void fast_export_blob(uint32_t mode, uint32_t mark, uint32_t len,
- struct line_buffer *input);
+void fast_export_end_commit(uint32_t revision);
+void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input);
+void fast_export_blob_delta(uint32_t mode,
+ uint32_t old_mode, const char *old_data,
+ off_t len, struct line_buffer *input);
+
+/* If there is no such file at that rev, returns -1, errno == ENOENT. */
+int fast_export_ls_rev(uint32_t rev, const char *path,
+ uint32_t *mode_out, struct strbuf *dataref_out);
+int fast_export_ls(const char *path,
+ uint32_t *mode_out, struct strbuf *dataref_out);
#endif
diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
index c39038723e..01fcb842f1 100644
--- a/vcs-svn/line_buffer.c
+++ b/vcs-svn/line_buffer.c
@@ -91,10 +91,10 @@ char *buffer_read_line(struct line_buffer *buf)
return buf->line_buffer;
}
-void buffer_read_binary(struct line_buffer *buf,
- struct strbuf *sb, uint32_t size)
+size_t buffer_read_binary(struct line_buffer *buf,
+ struct strbuf *sb, size_t size)
{
- strbuf_fread(sb, size, buf->infile);
+ return strbuf_fread(sb, size, buf->infile);
}
off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h
index d0b22dda76..8901f214ba 100644
--- a/vcs-svn/line_buffer.h
+++ b/vcs-svn/line_buffer.h
@@ -23,7 +23,7 @@ long buffer_tmpfile_prepare_to_read(struct line_buffer *buf);
int buffer_ferror(struct line_buffer *buf);
char *buffer_read_line(struct line_buffer *buf);
int buffer_read_char(struct line_buffer *buf);
-void buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, uint32_t len);
+size_t buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, size_t len);
/* Returns number of bytes read (not necessarily written). */
off_t buffer_copy_bytes(struct line_buffer *buf, off_t len);
off_t buffer_skip_bytes(struct line_buffer *buf, off_t len);
diff --git a/vcs-svn/obj_pool.h b/vcs-svn/obj_pool.h
deleted file mode 100644
index deb6eb8135..0000000000
--- a/vcs-svn/obj_pool.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Licensed under a two-clause BSD-style license.
- * See LICENSE for details.
- */
-
-#ifndef OBJ_POOL_H_
-#define OBJ_POOL_H_
-
-#include "git-compat-util.h"
-
-#define MAYBE_UNUSED __attribute__((__unused__))
-
-#define obj_pool_gen(pre, obj_t, initial_capacity) \
-static struct { \
- uint32_t committed; \
- uint32_t size; \
- uint32_t capacity; \
- obj_t *base; \
-} pre##_pool = {0, 0, 0, NULL}; \
-static MAYBE_UNUSED uint32_t pre##_alloc(uint32_t count) \
-{ \
- uint32_t offset; \
- if (pre##_pool.size + count > pre##_pool.capacity) { \
- while (pre##_pool.size + count > pre##_pool.capacity) \
- if (pre##_pool.capacity) \
- pre##_pool.capacity *= 2; \
- else \
- pre##_pool.capacity = initial_capacity; \
- pre##_pool.base = realloc(pre##_pool.base, \
- pre##_pool.capacity * sizeof(obj_t)); \
- } \
- offset = pre##_pool.size; \
- pre##_pool.size += count; \
- return offset; \
-} \
-static MAYBE_UNUSED void pre##_free(uint32_t count) \
-{ \
- pre##_pool.size -= count; \
-} \
-static MAYBE_UNUSED uint32_t pre##_offset(obj_t *obj) \
-{ \
- return obj == NULL ? ~0 : obj - pre##_pool.base; \
-} \
-static MAYBE_UNUSED obj_t *pre##_pointer(uint32_t offset) \
-{ \
- return offset >= pre##_pool.size ? NULL : &pre##_pool.base[offset]; \
-} \
-static MAYBE_UNUSED void pre##_commit(void) \
-{ \
- pre##_pool.committed = pre##_pool.size; \
-} \
-static MAYBE_UNUSED void pre##_reset(void) \
-{ \
- free(pre##_pool.base); \
- pre##_pool.base = NULL; \
- pre##_pool.size = 0; \
- pre##_pool.capacity = 0; \
- pre##_pool.committed = 0; \
-}
-
-#endif
diff --git a/vcs-svn/repo_tree.c b/vcs-svn/repo_tree.c
index a21d89de97..67d27f0b6c 100644
--- a/vcs-svn/repo_tree.c
+++ b/vcs-svn/repo_tree.c
@@ -4,323 +4,45 @@
*/
#include "git-compat-util.h"
-
-#include "string_pool.h"
+#include "strbuf.h"
#include "repo_tree.h"
-#include "obj_pool.h"
#include "fast_export.h"
-#include "trp.h"
-
-struct repo_dirent {
- uint32_t name_offset;
- struct trp_node children;
- uint32_t mode;
- uint32_t content_offset;
-};
-
-struct repo_dir {
- struct trp_root entries;
-};
-
-struct repo_commit {
- uint32_t root_dir_offset;
-};
-
-/* Memory pools for commit, dir and dirent */
-obj_pool_gen(commit, struct repo_commit, 4096)
-obj_pool_gen(dir, struct repo_dir, 4096)
-obj_pool_gen(dent, struct repo_dirent, 4096)
-
-static uint32_t active_commit;
-static uint32_t mark;
-
-static int repo_dirent_name_cmp(const void *a, const void *b);
-
-/* Treap for directory entries */
-trp_gen(static, dent_, struct repo_dirent, children, dent, repo_dirent_name_cmp)
-
-uint32_t next_blob_mark(void)
+const char *repo_read_path(const char *path, uint32_t *mode_out)
{
- return mark++;
-}
+ int err;
+ static struct strbuf buf = STRBUF_INIT;
-static struct repo_dir *repo_commit_root_dir(struct repo_commit *commit)
-{
- return dir_pointer(commit->root_dir_offset);
-}
-
-static struct repo_dirent *repo_first_dirent(struct repo_dir *dir)
-{
- return dent_first(&dir->entries);
-}
-
-static int repo_dirent_name_cmp(const void *a, const void *b)
-{
- const struct repo_dirent *dent1 = a, *dent2 = b;
- uint32_t a_offset = dent1->name_offset;
- uint32_t b_offset = dent2->name_offset;
- return (a_offset > b_offset) - (a_offset < b_offset);
-}
-
-static int repo_dirent_is_dir(struct repo_dirent *dent)
-{
- return dent != NULL && dent->mode == REPO_MODE_DIR;
-}
-
-static struct repo_dir *repo_dir_from_dirent(struct repo_dirent *dent)
-{
- if (!repo_dirent_is_dir(dent))
+ strbuf_reset(&buf);
+ err = fast_export_ls(path, mode_out, &buf);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls error");
+ /* Treat missing paths as directories. */
+ *mode_out = REPO_MODE_DIR;
return NULL;
- return dir_pointer(dent->content_offset);
-}
-
-static struct repo_dir *repo_clone_dir(struct repo_dir *orig_dir)
-{
- uint32_t orig_o, new_o;
- orig_o = dir_offset(orig_dir);
- if (orig_o >= dir_pool.committed)
- return orig_dir;
- new_o = dir_alloc(1);
- orig_dir = dir_pointer(orig_o);
- *dir_pointer(new_o) = *orig_dir;
- return dir_pointer(new_o);
-}
-
-static struct repo_dirent *repo_read_dirent(uint32_t revision,
- const uint32_t *path)
-{
- uint32_t name = 0;
- struct repo_dirent *key = dent_pointer(dent_alloc(1));
- struct repo_dir *dir = NULL;
- struct repo_dirent *dent = NULL;
- dir = repo_commit_root_dir(commit_pointer(revision));
- while (~(name = *path++)) {
- key->name_offset = name;
- dent = dent_search(&dir->entries, key);
- if (dent == NULL || !repo_dirent_is_dir(dent))
- break;
- dir = repo_dir_from_dirent(dent);
}
- dent_free(1);
- return dent;
+ return buf.buf;
}
-static void repo_write_dirent(const uint32_t *path, uint32_t mode,
- uint32_t content_offset, uint32_t del)
+void repo_copy(uint32_t revision, const char *src, const char *dst)
{
- uint32_t name, revision, dir_o = ~0, parent_dir_o = ~0;
- struct repo_dir *dir;
- struct repo_dirent *key;
- struct repo_dirent *dent = NULL;
- revision = active_commit;
- dir = repo_commit_root_dir(commit_pointer(revision));
- dir = repo_clone_dir(dir);
- commit_pointer(revision)->root_dir_offset = dir_offset(dir);
- while (~(name = *path++)) {
- parent_dir_o = dir_offset(dir);
-
- key = dent_pointer(dent_alloc(1));
- key->name_offset = name;
-
- dent = dent_search(&dir->entries, key);
- if (dent == NULL)
- dent = key;
- else
- dent_free(1);
-
- if (dent == key) {
- dent->mode = REPO_MODE_DIR;
- dent->content_offset = 0;
- dent = dent_insert(&dir->entries, dent);
- }
-
- if (dent_offset(dent) < dent_pool.committed) {
- dir_o = repo_dirent_is_dir(dent) ?
- dent->content_offset : ~0;
- dent_remove(&dir->entries, dent);
- dent = dent_pointer(dent_alloc(1));
- dent->name_offset = name;
- dent->mode = REPO_MODE_DIR;
- dent->content_offset = dir_o;
- dent = dent_insert(&dir->entries, dent);
- }
-
- dir = repo_dir_from_dirent(dent);
- dir = repo_clone_dir(dir);
- dent->content_offset = dir_offset(dir);
- }
- if (dent == NULL)
+ int err;
+ uint32_t mode;
+ static struct strbuf data = STRBUF_INIT;
+
+ strbuf_reset(&data);
+ err = fast_export_ls_rev(revision, src, &mode, &data);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls_rev error");
+ fast_export_delete(dst);
return;
- dent->mode = mode;
- dent->content_offset = content_offset;
- if (del && ~parent_dir_o)
- dent_remove(&dir_pointer(parent_dir_o)->entries, dent);
-}
-
-uint32_t repo_read_path(const uint32_t *path)
-{
- uint32_t content_offset = 0;
- struct repo_dirent *dent = repo_read_dirent(active_commit, path);
- if (dent != NULL)
- content_offset = dent->content_offset;
- return content_offset;
-}
-
-uint32_t repo_read_mode(const uint32_t *path)
-{
- struct repo_dirent *dent = repo_read_dirent(active_commit, path);
- if (dent == NULL)
- die("invalid dump: path to be modified is missing");
- return dent->mode;
-}
-
-void repo_copy(uint32_t revision, const uint32_t *src, const uint32_t *dst)
-{
- uint32_t mode = 0, content_offset = 0;
- struct repo_dirent *src_dent;
- src_dent = repo_read_dirent(revision, src);
- if (src_dent != NULL) {
- mode = src_dent->mode;
- content_offset = src_dent->content_offset;
- repo_write_dirent(dst, mode, content_offset, 0);
- }
-}
-
-void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark)
-{
- repo_write_dirent(path, mode, blob_mark, 0);
-}
-
-void repo_delete(uint32_t *path)
-{
- repo_write_dirent(path, 0, 0, 1);
-}
-
-static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir);
-
-static void repo_git_add(uint32_t depth, uint32_t *path, struct repo_dirent *dent)
-{
- if (repo_dirent_is_dir(dent))
- repo_git_add_r(depth, path, repo_dir_from_dirent(dent));
- else
- fast_export_modify(depth, path,
- dent->mode, dent->content_offset);
-}
-
-static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir)
-{
- struct repo_dirent *de = repo_first_dirent(dir);
- while (de) {
- path[depth] = de->name_offset;
- repo_git_add(depth + 1, path, de);
- de = dent_next(&dir->entries, de);
- }
-}
-
-static void repo_diff_r(uint32_t depth, uint32_t *path, struct repo_dir *dir1,
- struct repo_dir *dir2)
-{
- struct repo_dirent *de1, *de2;
- de1 = repo_first_dirent(dir1);
- de2 = repo_first_dirent(dir2);
-
- while (de1 && de2) {
- if (de1->name_offset < de2->name_offset) {
- path[depth] = de1->name_offset;
- fast_export_delete(depth + 1, path);
- de1 = dent_next(&dir1->entries, de1);
- continue;
- }
- if (de1->name_offset > de2->name_offset) {
- path[depth] = de2->name_offset;
- repo_git_add(depth + 1, path, de2);
- de2 = dent_next(&dir2->entries, de2);
- continue;
- }
- path[depth] = de1->name_offset;
-
- if (de1->mode == de2->mode &&
- de1->content_offset == de2->content_offset) {
- ; /* No change. */
- } else if (repo_dirent_is_dir(de1) && repo_dirent_is_dir(de2)) {
- repo_diff_r(depth + 1, path,
- repo_dir_from_dirent(de1),
- repo_dir_from_dirent(de2));
- } else if (!repo_dirent_is_dir(de1) && !repo_dirent_is_dir(de2)) {
- repo_git_add(depth + 1, path, de2);
- } else {
- fast_export_delete(depth + 1, path);
- repo_git_add(depth + 1, path, de2);
- }
- de1 = dent_next(&dir1->entries, de1);
- de2 = dent_next(&dir2->entries, de2);
- }
- while (de1) {
- path[depth] = de1->name_offset;
- fast_export_delete(depth + 1, path);
- de1 = dent_next(&dir1->entries, de1);
- }
- while (de2) {
- path[depth] = de2->name_offset;
- repo_git_add(depth + 1, path, de2);
- de2 = dent_next(&dir2->entries, de2);
- }
-}
-
-static uint32_t path_stack[REPO_MAX_PATH_DEPTH];
-
-void repo_diff(uint32_t r1, uint32_t r2)
-{
- repo_diff_r(0,
- path_stack,
- repo_commit_root_dir(commit_pointer(r1)),
- repo_commit_root_dir(commit_pointer(r2)));
-}
-
-void repo_commit(uint32_t revision, const char *author,
- const struct strbuf *log, const char *uuid, const char *url,
- unsigned long timestamp)
-{
- fast_export_commit(revision, author, log, uuid, url, timestamp);
- dent_commit();
- dir_commit();
- active_commit = commit_alloc(1);
- commit_pointer(active_commit)->root_dir_offset =
- commit_pointer(active_commit - 1)->root_dir_offset;
-}
-
-static void mark_init(void)
-{
- uint32_t i;
- mark = 0;
- for (i = 0; i < dent_pool.size; i++)
- if (!repo_dirent_is_dir(dent_pointer(i)) &&
- dent_pointer(i)->content_offset > mark)
- mark = dent_pointer(i)->content_offset;
- mark++;
-}
-
-void repo_init(void)
-{
- mark_init();
- if (commit_pool.size == 0) {
- /* Create empty tree for commit 0. */
- commit_alloc(1);
- commit_pointer(0)->root_dir_offset = dir_alloc(1);
- dir_pointer(0)->entries.trp_root = ~0;
- dir_commit();
}
- /* Preallocate next commit, ready for changes. */
- active_commit = commit_alloc(1);
- commit_pointer(active_commit)->root_dir_offset =
- commit_pointer(active_commit - 1)->root_dir_offset;
+ fast_export_modify(dst, mode, data.buf);
}
-void repo_reset(void)
+void repo_delete(const char *path)
{
- pool_reset();
- commit_reset();
- dir_reset();
- dent_reset();
+ fast_export_delete(path);
}
diff --git a/vcs-svn/repo_tree.h b/vcs-svn/repo_tree.h
index 37bde2e374..889c6a3c95 100644
--- a/vcs-svn/repo_tree.h
+++ b/vcs-svn/repo_tree.h
@@ -8,15 +8,11 @@ struct strbuf;
#define REPO_MODE_EXE 0100755
#define REPO_MODE_LNK 0120000
-#define REPO_MAX_PATH_LEN 4096
-#define REPO_MAX_PATH_DEPTH 1000
-
uint32_t next_blob_mark(void);
-void repo_copy(uint32_t revision, const uint32_t *src, const uint32_t *dst);
-void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark);
-uint32_t repo_read_path(const uint32_t *path);
-uint32_t repo_read_mode(const uint32_t *path);
-void repo_delete(uint32_t *path);
+void repo_copy(uint32_t revision, const char *src, const char *dst);
+void repo_add(const char *path, uint32_t mode, uint32_t blob_mark);
+const char *repo_read_path(const char *path, uint32_t *mode_out);
+void repo_delete(const char *path);
void repo_commit(uint32_t revision, const char *author,
const struct strbuf *log, const char *uuid, const char *url,
long unsigned timestamp);
diff --git a/vcs-svn/sliding_window.c b/vcs-svn/sliding_window.c
new file mode 100644
index 0000000000..ec2707c9c4
--- /dev/null
+++ b/vcs-svn/sliding_window.c
@@ -0,0 +1,79 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
+#include "strbuf.h"
+
+static int input_error(struct line_buffer *file)
+{
+ if (!buffer_ferror(file))
+ return error("delta preimage ends early");
+ return error("cannot read delta preimage: %s", strerror(errno));
+}
+
+static int skip_or_whine(struct line_buffer *file, off_t gap)
+{
+ if (buffer_skip_bytes(file, gap) != gap)
+ return input_error(file);
+ return 0;
+}
+
+static int read_to_fill_or_whine(struct line_buffer *file,
+ struct strbuf *buf, size_t width)
+{
+ buffer_read_binary(file, buf, width - buf->len);
+ if (buf->len != width)
+ return input_error(file);
+ return 0;
+}
+
+static int check_offset_overflow(off_t offset, uintmax_t len)
+{
+ if (len > maximum_signed_value_of_type(off_t))
+ return error("unrepresentable length in delta: "
+ "%"PRIuMAX" > OFF_MAX", len);
+ if (signed_add_overflows(offset, (off_t) len))
+ return error("unrepresentable offset in delta: "
+ "%"PRIuMAX" + %"PRIuMAX" > OFF_MAX",
+ (uintmax_t) offset, len);
+ return 0;
+}
+
+int move_window(struct sliding_view *view, off_t off, size_t width)
+{
+ off_t file_offset;
+ assert(view);
+ assert(view->width <= view->buf.len);
+ assert(!check_offset_overflow(view->off, view->buf.len));
+
+ if (check_offset_overflow(off, width))
+ return -1;
+ if (off < view->off || off + width < view->off + view->width)
+ return error("invalid delta: window slides left");
+ if (view->max_off >= 0 && view->max_off < off + width)
+ return error("delta preimage ends early");
+
+ file_offset = view->off + view->buf.len;
+ if (off < file_offset) {
+ /* Move the overlapping region into place. */
+ strbuf_remove(&view->buf, 0, off - view->off);
+ } else {
+ /* Seek ahead to skip the gap. */
+ if (skip_or_whine(view->file, off - file_offset))
+ return -1;
+ strbuf_setlen(&view->buf, 0);
+ }
+
+ if (view->buf.len > width)
+ ; /* Already read. */
+ else if (read_to_fill_or_whine(view->file, &view->buf, width))
+ return -1;
+
+ view->off = off;
+ view->width = width;
+ return 0;
+}
diff --git a/vcs-svn/sliding_window.h b/vcs-svn/sliding_window.h
new file mode 100644
index 0000000000..b43a825cba
--- /dev/null
+++ b/vcs-svn/sliding_window.h
@@ -0,0 +1,18 @@
+#ifndef SLIDING_WINDOW_H_
+#define SLIDING_WINDOW_H_
+
+#include "strbuf.h"
+
+struct sliding_view {
+ struct line_buffer *file;
+ off_t off;
+ size_t width;
+ off_t max_off; /* -1 means unlimited */
+ struct strbuf buf;
+};
+
+#define SLIDING_VIEW_INIT(input, len) { (input), 0, 0, (len), STRBUF_INIT }
+
+extern int move_window(struct sliding_view *view, off_t off, size_t width);
+
+#endif
diff --git a/vcs-svn/string_pool.c b/vcs-svn/string_pool.c
deleted file mode 100644
index 8af8d54d6e..0000000000
--- a/vcs-svn/string_pool.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Licensed under a two-clause BSD-style license.
- * See LICENSE for details.
- */
-
-#include "git-compat-util.h"
-#include "trp.h"
-#include "obj_pool.h"
-#include "string_pool.h"
-
-static struct trp_root tree = { ~0 };
-
-struct node {
- uint32_t offset;
- struct trp_node children;
-};
-
-/* Two memory pools: one for struct node, and another for strings */
-obj_pool_gen(node, struct node, 4096)
-obj_pool_gen(string, char, 4096)
-
-static char *node_value(struct node *node)
-{
- return node ? string_pointer(node->offset) : NULL;
-}
-
-static int node_cmp(struct node *a, struct node *b)
-{
- return strcmp(node_value(a), node_value(b));
-}
-
-/* Build a Treap from the node structure (a trp_node w/ offset) */
-trp_gen(static, tree_, struct node, children, node, node_cmp)
-
-const char *pool_fetch(uint32_t entry)
-{
- return node_value(node_pointer(entry));
-}
-
-uint32_t pool_intern(const char *key)
-{
- /* Canonicalize key */
- struct node *match = NULL, *node;
- uint32_t key_len;
- if (key == NULL)
- return ~0;
- key_len = strlen(key) + 1;
- node = node_pointer(node_alloc(1));
- node->offset = string_alloc(key_len);
- strcpy(node_value(node), key);
- match = tree_search(&tree, node);
- if (!match) {
- tree_insert(&tree, node);
- } else {
- node_free(1);
- string_free(key_len);
- node = match;
- }
- return node_offset(node);
-}
-
-uint32_t pool_tok_r(char *str, const char *delim, char **saveptr)
-{
- char *token = strtok_r(str, delim, saveptr);
- return token ? pool_intern(token) : ~0;
-}
-
-void pool_print_seq(uint32_t len, uint32_t *seq, char delim, FILE *stream)
-{
- uint32_t i;
- for (i = 0; i < len && ~seq[i]; i++) {
- fputs(pool_fetch(seq[i]), stream);
- if (i < len - 1 && ~seq[i + 1])
- fputc(delim, stream);
- }
-}
-
-uint32_t pool_tok_seq(uint32_t sz, uint32_t *seq, const char *delim, char *str)
-{
- char *context = NULL;
- uint32_t token = ~0;
- uint32_t length;
-
- if (sz == 0)
- return ~0;
- if (str)
- token = pool_tok_r(str, delim, &context);
- for (length = 0; length < sz; length++) {
- seq[length] = token;
- if (token == ~0)
- return length;
- token = pool_tok_r(NULL, delim, &context);
- }
- seq[sz - 1] = ~0;
- return sz;
-}
-
-void pool_reset(void)
-{
- node_reset();
- string_reset();
-}
diff --git a/vcs-svn/string_pool.h b/vcs-svn/string_pool.h
deleted file mode 100644
index 222fb66e68..0000000000
--- a/vcs-svn/string_pool.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef STRING_POOL_H_
-#define STRING_POOL_H_
-
-uint32_t pool_intern(const char *key);
-const char *pool_fetch(uint32_t entry);
-uint32_t pool_tok_r(char *str, const char *delim, char **saveptr);
-void pool_print_seq(uint32_t len, uint32_t *seq, char delim, FILE *stream);
-uint32_t pool_tok_seq(uint32_t sz, uint32_t *seq, const char *delim, char *str);
-void pool_reset(void);
-
-#endif
diff --git a/vcs-svn/string_pool.txt b/vcs-svn/string_pool.txt
deleted file mode 100644
index 1b41f15628..0000000000
--- a/vcs-svn/string_pool.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-string_pool API
-===============
-
-The string_pool API provides facilities for replacing strings
-with integer keys that can be more easily compared and stored.
-The facilities are designed so that one could teach Git without
-too much trouble to store the information needed for these keys to
-remain valid over multiple executions.
-
-Functions
----------
-
-pool_intern::
- Include a string in the string pool and get its key.
- If that string is already in the pool, retrieves its
- existing key.
-
-pool_fetch::
- Retrieve the string associated to a given key.
-
-pool_tok_r::
- Extract the key of the next token from a string.
- Interface mimics strtok_r.
-
-pool_print_seq::
- Print a sequence of strings named by key to a file, using the
- specified delimiter to separate them.
-
- If NULL (key ~0) appears in the sequence, the sequence ends
- early.
-
-pool_tok_seq::
- Split a string into tokens, storing the keys of segments
- into a caller-provided array.
-
- Unless sz is 0, the array will always be ~0-terminated.
- If there is not enough room for all the tokens, the
- array holds as many tokens as fit in the entries before
- the terminating ~0. Return value is the index after the
- last token, or sz if the tokens did not fit.
-
-pool_reset::
- Deallocate storage for the string pool.
diff --git a/vcs-svn/svndiff.c b/vcs-svn/svndiff.c
new file mode 100644
index 0000000000..1647c1a780
--- /dev/null
+++ b/vcs-svn/svndiff.c
@@ -0,0 +1,308 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
+#include "svndiff.h"
+
+/*
+ * svndiff0 applier
+ *
+ * See http://svn.apache.org/repos/asf/subversion/trunk/notes/svndiff.
+ *
+ * svndiff0 ::= 'SVN\0' window*
+ * window ::= int int int int int instructions inline_data;
+ * instructions ::= instruction*;
+ * instruction ::= view_selector int int
+ * | copyfrom_data int
+ * | packed_view_selector int
+ * | packed_copyfrom_data
+ * ;
+ * view_selector ::= copyfrom_source
+ * | copyfrom_target
+ * ;
+ * copyfrom_source ::= # binary 00 000000;
+ * copyfrom_target ::= # binary 01 000000;
+ * copyfrom_data ::= # binary 10 000000;
+ * packed_view_selector ::= # view_selector OR-ed with 6 bit value;
+ * packed_copyfrom_data ::= # copyfrom_data OR-ed with 6 bit value;
+ * int ::= highdigit* lowdigit;
+ * highdigit ::= # binary 1000 0000 OR-ed with 7 bit value;
+ * lowdigit ::= # 7 bit value;
+ */
+
+#define INSN_MASK 0xc0
+#define INSN_COPYFROM_SOURCE 0x00
+#define INSN_COPYFROM_TARGET 0x40
+#define INSN_COPYFROM_DATA 0x80
+#define OPERAND_MASK 0x3f
+
+#define VLI_CONTINUE 0x80
+#define VLI_DIGIT_MASK 0x7f
+#define VLI_BITS_PER_DIGIT 7
+
+struct window {
+ struct sliding_view *in;
+ struct strbuf out;
+ struct strbuf instructions;
+ struct strbuf data;
+};
+
+#define WINDOW_INIT(w) { (w), STRBUF_INIT, STRBUF_INIT, STRBUF_INIT }
+
+static void window_release(struct window *ctx)
+{
+ strbuf_release(&ctx->out);
+ strbuf_release(&ctx->instructions);
+ strbuf_release(&ctx->data);
+}
+
+static int write_strbuf(struct strbuf *sb, FILE *out)
+{
+ if (fwrite(sb->buf, 1, sb->len, out) == sb->len) /* Success. */
+ return 0;
+ return error("cannot write delta postimage: %s", strerror(errno));
+}
+
+static int error_short_read(struct line_buffer *input)
+{
+ if (buffer_ferror(input))
+ return error("error reading delta: %s", strerror(errno));
+ return error("invalid delta: unexpected end of file");
+}
+
+static int read_chunk(struct line_buffer *delta, off_t *delta_len,
+ struct strbuf *buf, size_t len)
+{
+ strbuf_reset(buf);
+ if (len > *delta_len ||
+ buffer_read_binary(delta, buf, len) != len)
+ return error_short_read(delta);
+ *delta_len -= buf->len;
+ return 0;
+}
+
+static int read_magic(struct line_buffer *in, off_t *len)
+{
+ static const char magic[] = {'S', 'V', 'N', '\0'};
+ struct strbuf sb = STRBUF_INIT;
+
+ if (read_chunk(in, len, &sb, sizeof(magic))) {
+ strbuf_release(&sb);
+ return -1;
+ }
+ if (memcmp(sb.buf, magic, sizeof(magic))) {
+ strbuf_release(&sb);
+ return error("invalid delta: unrecognized file type");
+ }
+ strbuf_release(&sb);
+ return 0;
+}
+
+static int read_int(struct line_buffer *in, uintmax_t *result, off_t *len)
+{
+ uintmax_t rv = 0;
+ off_t sz;
+ for (sz = *len; sz; sz--) {
+ const int ch = buffer_read_char(in);
+ if (ch == EOF)
+ break;
+
+ rv <<= VLI_BITS_PER_DIGIT;
+ rv += (ch & VLI_DIGIT_MASK);
+ if (ch & VLI_CONTINUE)
+ continue;
+
+ *result = rv;
+ *len = sz - 1;
+ return 0;
+ }
+ return error_short_read(in);
+}
+
+static int parse_int(const char **buf, size_t *result, const char *end)
+{
+ size_t rv = 0;
+ const char *pos;
+ for (pos = *buf; pos != end; pos++) {
+ unsigned char ch = *pos;
+
+ rv <<= VLI_BITS_PER_DIGIT;
+ rv += (ch & VLI_DIGIT_MASK);
+ if (ch & VLI_CONTINUE)
+ continue;
+
+ *result = rv;
+ *buf = pos + 1;
+ return 0;
+ }
+ return error("invalid delta: unexpected end of instructions section");
+}
+
+static int read_offset(struct line_buffer *in, off_t *result, off_t *len)
+{
+ uintmax_t val;
+ if (read_int(in, &val, len))
+ return -1;
+ if (val > maximum_signed_value_of_type(off_t))
+ return error("unrepresentable offset in delta: %"PRIuMAX"", val);
+ *result = val;
+ return 0;
+}
+
+static int read_length(struct line_buffer *in, size_t *result, off_t *len)
+{
+ uintmax_t val;
+ if (read_int(in, &val, len))
+ return -1;
+ if (val > SIZE_MAX)
+ return error("unrepresentable length in delta: %"PRIuMAX"", val);
+ *result = val;
+ return 0;
+}
+
+static int copyfrom_source(struct window *ctx, const char **instructions,
+ size_t nbytes, const char *insns_end)
+{
+ size_t offset;
+ if (parse_int(instructions, &offset, insns_end))
+ return -1;
+ if (unsigned_add_overflows(offset, nbytes) ||
+ offset + nbytes > ctx->in->width)
+ return error("invalid delta: copies source data outside view");
+ strbuf_add(&ctx->out, ctx->in->buf.buf + offset, nbytes);
+ return 0;
+}
+
+static int copyfrom_target(struct window *ctx, const char **instructions,
+ size_t nbytes, const char *instructions_end)
+{
+ size_t offset;
+ if (parse_int(instructions, &offset, instructions_end))
+ return -1;
+ if (offset >= ctx->out.len)
+ return error("invalid delta: copies from the future");
+ for (; nbytes > 0; nbytes--)
+ strbuf_addch(&ctx->out, ctx->out.buf[offset++]);
+ return 0;
+}
+
+static int copyfrom_data(struct window *ctx, size_t *data_pos, size_t nbytes)
+{
+ const size_t pos = *data_pos;
+ if (unsigned_add_overflows(pos, nbytes) ||
+ pos + nbytes > ctx->data.len)
+ return error("invalid delta: copies unavailable inline data");
+ strbuf_add(&ctx->out, ctx->data.buf + pos, nbytes);
+ *data_pos += nbytes;
+ return 0;
+}
+
+static int parse_first_operand(const char **buf, size_t *out, const char *end)
+{
+ size_t result = (unsigned char) *(*buf)++ & OPERAND_MASK;
+ if (result) { /* immediate operand */
+ *out = result;
+ return 0;
+ }
+ return parse_int(buf, out, end);
+}
+
+static int execute_one_instruction(struct window *ctx,
+ const char **instructions, size_t *data_pos)
+{
+ unsigned int instruction;
+ const char *insns_end = ctx->instructions.buf + ctx->instructions.len;
+ size_t nbytes;
+ assert(ctx);
+ assert(instructions && *instructions);
+ assert(data_pos);
+
+ instruction = (unsigned char) **instructions;
+ if (parse_first_operand(instructions, &nbytes, insns_end))
+ return -1;
+ switch (instruction & INSN_MASK) {
+ case INSN_COPYFROM_SOURCE:
+ return copyfrom_source(ctx, instructions, nbytes, insns_end);
+ case INSN_COPYFROM_TARGET:
+ return copyfrom_target(ctx, instructions, nbytes, insns_end);
+ case INSN_COPYFROM_DATA:
+ return copyfrom_data(ctx, data_pos, nbytes);
+ default:
+ return error("invalid delta: unrecognized instruction");
+ }
+}
+
+static int apply_window_in_core(struct window *ctx)
+{
+ const char *instructions;
+ size_t data_pos = 0;
+
+ /*
+ * Fill ctx->out.buf using data from the source, target,
+ * and inline data views.
+ */
+ for (instructions = ctx->instructions.buf;
+ instructions != ctx->instructions.buf + ctx->instructions.len;
+ )
+ if (execute_one_instruction(ctx, &instructions, &data_pos))
+ return -1;
+ if (data_pos != ctx->data.len)
+ return error("invalid delta: does not copy all inline data");
+ return 0;
+}
+
+static int apply_one_window(struct line_buffer *delta, off_t *delta_len,
+ struct sliding_view *preimage, FILE *out)
+{
+ struct window ctx = WINDOW_INIT(preimage);
+ size_t out_len;
+ size_t instructions_len;
+ size_t data_len;
+ assert(delta_len);
+
+ /* "source view" offset and length already handled; */
+ if (read_length(delta, &out_len, delta_len) ||
+ read_length(delta, &instructions_len, delta_len) ||
+ read_length(delta, &data_len, delta_len) ||
+ read_chunk(delta, delta_len, &ctx.instructions, instructions_len) ||
+ read_chunk(delta, delta_len, &ctx.data, data_len))
+ goto error_out;
+ strbuf_grow(&ctx.out, out_len);
+ if (apply_window_in_core(&ctx))
+ goto error_out;
+ if (ctx.out.len != out_len) {
+ error("invalid delta: incorrect postimage length");
+ goto error_out;
+ }
+ if (write_strbuf(&ctx.out, out))
+ goto error_out;
+ window_release(&ctx);
+ return 0;
+error_out:
+ window_release(&ctx);
+ return -1;
+}
+
+int svndiff0_apply(struct line_buffer *delta, off_t delta_len,
+ struct sliding_view *preimage, FILE *postimage)
+{
+ assert(delta && preimage && postimage);
+
+ if (read_magic(delta, &delta_len))
+ return -1;
+ while (delta_len) { /* For each window: */
+ off_t pre_off = pre_off; /* stupid GCC... */
+ size_t pre_len;
+
+ if (read_offset(delta, &pre_off, &delta_len) ||
+ read_length(delta, &pre_len, &delta_len) ||
+ move_window(preimage, pre_off, pre_len) ||
+ apply_one_window(delta, &delta_len, preimage, postimage))
+ return -1;
+ }
+ return 0;
+}
diff --git a/vcs-svn/svndiff.h b/vcs-svn/svndiff.h
new file mode 100644
index 0000000000..74eb464bab
--- /dev/null
+++ b/vcs-svn/svndiff.h
@@ -0,0 +1,10 @@
+#ifndef SVNDIFF_H_
+#define SVNDIFF_H_
+
+struct line_buffer;
+struct sliding_view;
+
+extern int svndiff0_apply(struct line_buffer *delta, off_t delta_len,
+ struct sliding_view *preimage, FILE *postimage);
+
+#endif
diff --git a/vcs-svn/svndump.c b/vcs-svn/svndump.c
index bc792223b2..0899790a33 100644
--- a/vcs-svn/svndump.c
+++ b/vcs-svn/svndump.c
@@ -11,7 +11,6 @@
#include "repo_tree.h"
#include "fast_export.h"
#include "line_buffer.h"
-#include "string_pool.h"
#include "strbuf.h"
#include "svndump.h"
@@ -21,15 +20,19 @@
*/
#define constcmp(s, ref) memcmp(s, ref, sizeof(ref) - 1)
+#define REPORT_FILENO 3
+
#define NODEACT_REPLACE 4
#define NODEACT_DELETE 3
#define NODEACT_ADD 2
#define NODEACT_CHANGE 1
#define NODEACT_UNKNOWN 0
-#define DUMP_CTX 0
-#define REV_CTX 1
-#define NODE_CTX 2
+/* States: */
+#define DUMP_CTX 0 /* dump metadata */
+#define REV_CTX 1 /* revision metadata */
+#define NODE_CTX 2 /* node metadata */
+#define INTERNODE_CTX 3 /* between nodes */
#define LENGTH_UNKNOWN (~0)
#define DATE_RFC2822_LEN 31
@@ -37,8 +40,9 @@
static struct line_buffer input = LINE_BUFFER_INIT;
static struct {
- uint32_t action, propLength, textLength, srcRev, type;
- uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
+ uint32_t action, propLength, srcRev, type;
+ off_t text_length;
+ struct strbuf src, dst;
uint32_t text_delta, prop_delta;
} node_ctx;
@@ -58,10 +62,12 @@ static void reset_node_ctx(char *fname)
node_ctx.type = 0;
node_ctx.action = NODEACT_UNKNOWN;
node_ctx.propLength = LENGTH_UNKNOWN;
- node_ctx.textLength = LENGTH_UNKNOWN;
- node_ctx.src[0] = ~0;
+ node_ctx.text_length = -1;
+ strbuf_reset(&node_ctx.src);
node_ctx.srcRev = 0;
- pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
+ strbuf_reset(&node_ctx.dst);
+ if (fname)
+ strbuf_addstr(&node_ctx.dst, fname);
node_ctx.text_delta = 0;
node_ctx.prop_delta = 0;
}
@@ -169,7 +175,7 @@ static void read_props(void)
int ch;
if (!type || t[1] != ' ')
- die("invalid property line: %s\n", t);
+ die("invalid property line: %s", t);
len = atoi(&t[2]);
strbuf_reset(&val);
buffer_read_binary(&input, &val, len);
@@ -195,35 +201,39 @@ static void read_props(void)
strbuf_reset(&key);
continue;
default:
- die("invalid property line: %s\n", t);
+ die("invalid property line: %s", t);
}
}
}
static void handle_node(void)
{
- uint32_t mark = 0;
const uint32_t type = node_ctx.type;
const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
- const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
+ const int have_text = node_ctx.text_length != -1;
+ /*
+ * Old text for this node:
+ * NULL - directory or bug
+ * empty_blob - empty
+ * "<dataref>" - data retrievable from fast-import
+ */
+ static const char *const empty_blob = "::empty::";
+ const char *old_data = NULL;
+ uint32_t old_mode = REPO_MODE_BLB;
- if (node_ctx.text_delta)
- die("text deltas not supported");
- if (have_text)
- mark = next_blob_mark();
if (node_ctx.action == NODEACT_DELETE) {
if (have_text || have_props || node_ctx.srcRev)
die("invalid dump: deletion node has "
"copyfrom info, text, or properties");
- repo_delete(node_ctx.dst);
+ repo_delete(node_ctx.dst.buf);
return;
}
if (node_ctx.action == NODEACT_REPLACE) {
- repo_delete(node_ctx.dst);
+ repo_delete(node_ctx.dst.buf);
node_ctx.action = NODEACT_ADD;
}
if (node_ctx.srcRev) {
- repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
+ repo_copy(node_ctx.srcRev, node_ctx.src.buf, node_ctx.dst.buf);
if (node_ctx.action == NODEACT_ADD)
node_ctx.action = NODEACT_CHANGE;
}
@@ -231,23 +241,27 @@ static void handle_node(void)
die("invalid dump: directories cannot have text attached");
/*
- * Decide on the new content (mark) and mode (node_ctx.type).
+ * Find old content (old_data) and decide on the new mode.
*/
- if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
+ if (node_ctx.action == NODEACT_CHANGE && !*node_ctx.dst.buf) {
if (type != REPO_MODE_DIR)
die("invalid dump: root of tree is not a regular file");
+ old_data = NULL;
} else if (node_ctx.action == NODEACT_CHANGE) {
uint32_t mode;
- if (!have_text)
- mark = repo_read_path(node_ctx.dst);
- mode = repo_read_mode(node_ctx.dst);
+ old_data = repo_read_path(node_ctx.dst.buf, &mode);
if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
die("invalid dump: cannot modify a directory into a file");
if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
die("invalid dump: cannot modify a file into a directory");
node_ctx.type = mode;
+ old_mode = mode;
} else if (node_ctx.action == NODEACT_ADD) {
- if (!have_text && type != REPO_MODE_DIR)
+ if (type == REPO_MODE_DIR)
+ old_data = NULL;
+ else if (have_text)
+ old_data = empty_blob;
+ else
die("invalid dump: adds node without text");
} else {
die("invalid dump: Node-path block lacks Node-action");
@@ -266,18 +280,39 @@ static void handle_node(void)
/*
* Save the result.
*/
- repo_add(node_ctx.dst, node_ctx.type, mark);
- if (have_text)
- fast_export_blob(node_ctx.type, mark,
- node_ctx.textLength, &input);
+ if (type == REPO_MODE_DIR) /* directories are not tracked. */
+ return;
+ assert(old_data);
+ if (old_data == empty_blob)
+ /* For the fast_export_* functions, NULL means empty. */
+ old_data = NULL;
+ if (!have_text) {
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, old_data);
+ return;
+ }
+ if (!node_ctx.text_delta) {
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, "inline");
+ fast_export_data(node_ctx.type, node_ctx.text_length, &input);
+ return;
+ }
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, "inline");
+ fast_export_blob_delta(node_ctx.type, old_mode, old_data,
+ node_ctx.text_length, &input);
}
-static void handle_revision(void)
+static void begin_revision(void)
+{
+ if (!rev_ctx.revision) /* revision 0 gets no git commit. */
+ return;
+ fast_export_begin_commit(rev_ctx.revision, rev_ctx.author.buf,
+ &rev_ctx.log, dump_ctx.uuid.buf, dump_ctx.url.buf,
+ rev_ctx.timestamp);
+}
+
+static void end_revision(void)
{
if (rev_ctx.revision)
- repo_commit(rev_ctx.revision, rev_ctx.author.buf,
- &rev_ctx.log, dump_ctx.uuid.buf, dump_ctx.url.buf,
- rev_ctx.timestamp);
+ fast_export_end_commit(rev_ctx.revision);
}
void svndump_read(const char *url)
@@ -318,8 +353,10 @@ void svndump_read(const char *url)
continue;
if (active_ctx == NODE_CTX)
handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
if (active_ctx != DUMP_CTX)
- handle_revision();
+ end_revision();
active_ctx = REV_CTX;
reset_rev_ctx(atoi(val));
break;
@@ -329,6 +366,8 @@ void svndump_read(const char *url)
if (!constcmp(t + strlen("Node-"), "path")) {
if (active_ctx == NODE_CTX)
handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
active_ctx = NODE_CTX;
reset_node_ctx(val);
break;
@@ -361,7 +400,8 @@ void svndump_read(const char *url)
case sizeof("Node-copyfrom-path"):
if (constcmp(t, "Node-copyfrom-path"))
continue;
- pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
+ strbuf_reset(&node_ctx.src);
+ strbuf_addstr(&node_ctx.src, val);
break;
case sizeof("Node-copyfrom-rev"):
if (constcmp(t, "Node-copyfrom-rev"))
@@ -370,7 +410,15 @@ void svndump_read(const char *url)
break;
case sizeof("Text-content-length"):
if (!constcmp(t, "Text-content-length")) {
- node_ctx.textLength = atoi(val);
+ char *end;
+ uintmax_t textlen;
+
+ textlen = strtoumax(val, &end, 10);
+ if (!isdigit(*val) || *end)
+ die("invalid dump: non-numeric length %s", val);
+ if (textlen > maximum_signed_value_of_type(off_t))
+ die("unrepresentable length in dump: %s", val);
+ node_ctx.text_length = (off_t) textlen;
break;
}
if (constcmp(t, "Prop-content-length"))
@@ -399,7 +447,7 @@ void svndump_read(const char *url)
read_props();
} else if (active_ctx == NODE_CTX) {
handle_node();
- active_ctx = REV_CTX;
+ active_ctx = INTERNODE_CTX;
} else {
fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
if (buffer_skip_bytes(&input, len) != len)
@@ -411,19 +459,23 @@ void svndump_read(const char *url)
die_short_read();
if (active_ctx == NODE_CTX)
handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
if (active_ctx != DUMP_CTX)
- handle_revision();
+ end_revision();
}
int svndump_init(const char *filename)
{
if (buffer_init(&input, filename))
return error("cannot open %s: %s", filename, strerror(errno));
- repo_init();
+ fast_export_init(REPORT_FILENO);
strbuf_init(&dump_ctx.uuid, 4096);
strbuf_init(&dump_ctx.url, 4096);
strbuf_init(&rev_ctx.log, 4096);
strbuf_init(&rev_ctx.author, 4096);
+ strbuf_init(&node_ctx.src, 4096);
+ strbuf_init(&node_ctx.dst, 4096);
reset_dump_ctx(NULL);
reset_rev_ctx(0);
reset_node_ctx(NULL);
@@ -432,11 +484,13 @@ int svndump_init(const char *filename)
void svndump_deinit(void)
{
- repo_reset();
+ fast_export_deinit();
reset_dump_ctx(NULL);
reset_rev_ctx(0);
reset_node_ctx(NULL);
strbuf_release(&rev_ctx.log);
+ strbuf_release(&node_ctx.src);
+ strbuf_release(&node_ctx.dst);
if (buffer_deinit(&input))
fprintf(stderr, "Input error\n");
if (ferror(stdout))
@@ -445,8 +499,8 @@ void svndump_deinit(void)
void svndump_reset(void)
{
+ fast_export_reset();
buffer_reset(&input);
- repo_reset();
strbuf_release(&dump_ctx.uuid);
strbuf_release(&dump_ctx.url);
strbuf_release(&rev_ctx.log);
diff --git a/vcs-svn/trp.h b/vcs-svn/trp.h
deleted file mode 100644
index c32b9184e9..0000000000
--- a/vcs-svn/trp.h
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * C macro implementation of treaps.
- *
- * Usage:
- * #include <stdint.h>
- * #include "trp.h"
- * trp_gen(...)
- *
- * Licensed under a two-clause BSD-style license.
- * See LICENSE for details.
- */
-
-#ifndef TRP_H_
-#define TRP_H_
-
-#define MAYBE_UNUSED __attribute__((__unused__))
-
-/* Node structure. */
-struct trp_node {
- uint32_t trpn_left;
- uint32_t trpn_right;
-};
-
-/* Root structure. */
-struct trp_root {
- uint32_t trp_root;
-};
-
-/* Pointer/Offset conversion. */
-#define trpn_pointer(a_base, a_offset) (a_base##_pointer(a_offset))
-#define trpn_offset(a_base, a_pointer) (a_base##_offset(a_pointer))
-#define trpn_modify(a_base, a_offset) \
- do { \
- if ((a_offset) < a_base##_pool.committed) { \
- uint32_t old_offset = (a_offset);\
- (a_offset) = a_base##_alloc(1); \
- *trpn_pointer(a_base, a_offset) = \
- *trpn_pointer(a_base, old_offset); \
- } \
- } while (0)
-
-/* Left accessors. */
-#define trp_left_get(a_base, a_field, a_node) \
- (trpn_pointer(a_base, a_node)->a_field.trpn_left)
-#define trp_left_set(a_base, a_field, a_node, a_left) \
- do { \
- trpn_modify(a_base, a_node); \
- trp_left_get(a_base, a_field, a_node) = (a_left); \
- } while (0)
-
-/* Right accessors. */
-#define trp_right_get(a_base, a_field, a_node) \
- (trpn_pointer(a_base, a_node)->a_field.trpn_right)
-#define trp_right_set(a_base, a_field, a_node, a_right) \
- do { \
- trpn_modify(a_base, a_node); \
- trp_right_get(a_base, a_field, a_node) = (a_right); \
- } while (0)
-
-/*
- * Fibonacci hash function.
- * The multiplier is the nearest prime to (2^32 times (√5 - 1)/2).
- * See Knuth §6.4: volume 3, 3rd ed, p518.
- */
-#define trpn_hash(a_node) (uint32_t) (2654435761u * (a_node))
-
-/* Priority accessors. */
-#define trp_prio_get(a_node) trpn_hash(a_node)
-
-/* Node initializer. */
-#define trp_node_new(a_base, a_field, a_node) \
- do { \
- trp_left_set(a_base, a_field, (a_node), ~0); \
- trp_right_set(a_base, a_field, (a_node), ~0); \
- } while (0)
-
-/* Internal utility macros. */
-#define trpn_first(a_base, a_field, a_root, r_node) \
- do { \
- (r_node) = (a_root); \
- if ((r_node) == ~0) \
- return NULL; \
- while (~trp_left_get(a_base, a_field, (r_node))) \
- (r_node) = trp_left_get(a_base, a_field, (r_node)); \
- } while (0)
-
-#define trpn_rotate_left(a_base, a_field, a_node, r_node) \
- do { \
- (r_node) = trp_right_get(a_base, a_field, (a_node)); \
- trp_right_set(a_base, a_field, (a_node), \
- trp_left_get(a_base, a_field, (r_node))); \
- trp_left_set(a_base, a_field, (r_node), (a_node)); \
- } while (0)
-
-#define trpn_rotate_right(a_base, a_field, a_node, r_node) \
- do { \
- (r_node) = trp_left_get(a_base, a_field, (a_node)); \
- trp_left_set(a_base, a_field, (a_node), \
- trp_right_get(a_base, a_field, (r_node))); \
- trp_right_set(a_base, a_field, (r_node), (a_node)); \
- } while (0)
-
-#define trp_gen(a_attr, a_pre, a_type, a_field, a_base, a_cmp) \
-a_attr a_type MAYBE_UNUSED *a_pre##first(struct trp_root *treap) \
-{ \
- uint32_t ret; \
- trpn_first(a_base, a_field, treap->trp_root, ret); \
- return trpn_pointer(a_base, ret); \
-} \
-a_attr a_type MAYBE_UNUSED *a_pre##next(struct trp_root *treap, a_type *node) \
-{ \
- uint32_t ret; \
- uint32_t offset = trpn_offset(a_base, node); \
- if (~trp_right_get(a_base, a_field, offset)) { \
- trpn_first(a_base, a_field, \
- trp_right_get(a_base, a_field, offset), ret); \
- } else { \
- uint32_t tnode = treap->trp_root; \
- ret = ~0; \
- while (1) { \
- int cmp = (a_cmp)(trpn_pointer(a_base, offset), \
- trpn_pointer(a_base, tnode)); \
- if (cmp < 0) { \
- ret = tnode; \
- tnode = trp_left_get(a_base, a_field, tnode); \
- } else if (cmp > 0) { \
- tnode = trp_right_get(a_base, a_field, tnode); \
- } else { \
- break; \
- } \
- } \
- } \
- return trpn_pointer(a_base, ret); \
-} \
-a_attr a_type MAYBE_UNUSED *a_pre##search(struct trp_root *treap, a_type *key) \
-{ \
- int cmp; \
- uint32_t ret = treap->trp_root; \
- while (~ret && (cmp = (a_cmp)(key, trpn_pointer(a_base, ret)))) { \
- if (cmp < 0) { \
- ret = trp_left_get(a_base, a_field, ret); \
- } else { \
- ret = trp_right_get(a_base, a_field, ret); \
- } \
- } \
- return trpn_pointer(a_base, ret); \
-} \
-a_attr a_type MAYBE_UNUSED *a_pre##nsearch(struct trp_root *treap, a_type *key) \
-{ \
- int cmp; \
- uint32_t ret = treap->trp_root; \
- while (~ret && (cmp = (a_cmp)(key, trpn_pointer(a_base, ret)))) { \
- if (cmp < 0) { \
- if (!~trp_left_get(a_base, a_field, ret)) \
- break; \
- ret = trp_left_get(a_base, a_field, ret); \
- } else { \
- ret = trp_right_get(a_base, a_field, ret); \
- } \
- } \
- return trpn_pointer(a_base, ret); \
-} \
-a_attr uint32_t MAYBE_UNUSED a_pre##insert_recurse(uint32_t cur_node, uint32_t ins_node) \
-{ \
- if (cur_node == ~0) { \
- return ins_node; \
- } else { \
- uint32_t ret; \
- int cmp = (a_cmp)(trpn_pointer(a_base, ins_node), \
- trpn_pointer(a_base, cur_node)); \
- if (cmp < 0) { \
- uint32_t left = a_pre##insert_recurse( \
- trp_left_get(a_base, a_field, cur_node), ins_node); \
- trp_left_set(a_base, a_field, cur_node, left); \
- if (trp_prio_get(left) < trp_prio_get(cur_node)) \
- trpn_rotate_right(a_base, a_field, cur_node, ret); \
- else \
- ret = cur_node; \
- } else { \
- uint32_t right = a_pre##insert_recurse( \
- trp_right_get(a_base, a_field, cur_node), ins_node); \
- trp_right_set(a_base, a_field, cur_node, right); \
- if (trp_prio_get(right) < trp_prio_get(cur_node)) \
- trpn_rotate_left(a_base, a_field, cur_node, ret); \
- else \
- ret = cur_node; \
- } \
- return ret; \
- } \
-} \
-a_attr a_type *MAYBE_UNUSED a_pre##insert(struct trp_root *treap, a_type *node) \
-{ \
- uint32_t offset = trpn_offset(a_base, node); \
- trp_node_new(a_base, a_field, offset); \
- treap->trp_root = a_pre##insert_recurse(treap->trp_root, offset); \
- return trpn_pointer(a_base, offset); \
-} \
-a_attr uint32_t MAYBE_UNUSED a_pre##remove_recurse(uint32_t cur_node, uint32_t rem_node) \
-{ \
- int cmp = a_cmp(trpn_pointer(a_base, rem_node), \
- trpn_pointer(a_base, cur_node)); \
- if (cmp == 0) { \
- uint32_t ret; \
- uint32_t left = trp_left_get(a_base, a_field, cur_node); \
- uint32_t right = trp_right_get(a_base, a_field, cur_node); \
- if (left == ~0) { \
- if (right == ~0) \
- return ~0; \
- } else if (right == ~0 || trp_prio_get(left) < trp_prio_get(right)) { \
- trpn_rotate_right(a_base, a_field, cur_node, ret); \
- right = a_pre##remove_recurse(cur_node, rem_node); \
- trp_right_set(a_base, a_field, ret, right); \
- return ret; \
- } \
- trpn_rotate_left(a_base, a_field, cur_node, ret); \
- left = a_pre##remove_recurse(cur_node, rem_node); \
- trp_left_set(a_base, a_field, ret, left); \
- return ret; \
- } else if (cmp < 0) { \
- uint32_t left = a_pre##remove_recurse( \
- trp_left_get(a_base, a_field, cur_node), rem_node); \
- trp_left_set(a_base, a_field, cur_node, left); \
- return cur_node; \
- } else { \
- uint32_t right = a_pre##remove_recurse( \
- trp_right_get(a_base, a_field, cur_node), rem_node); \
- trp_right_set(a_base, a_field, cur_node, right); \
- return cur_node; \
- } \
-} \
-a_attr void MAYBE_UNUSED a_pre##remove(struct trp_root *treap, a_type *node) \
-{ \
- treap->trp_root = a_pre##remove_recurse(treap->trp_root, \
- trpn_offset(a_base, node)); \
-} \
-
-#endif
diff --git a/vcs-svn/trp.txt b/vcs-svn/trp.txt
deleted file mode 100644
index 177ebca335..0000000000
--- a/vcs-svn/trp.txt
+++ /dev/null
@@ -1,109 +0,0 @@
-Motivation
-==========
-
-Treaps provide a memory-efficient binary search tree structure.
-Insertion/deletion/search are about as about as fast in the average
-case as red-black trees and the chances of worst-case behavior are
-vanishingly small, thanks to (pseudo-)randomness. The bad worst-case
-behavior is a small price to pay, given that treaps are much simpler
-to implement.
-
-API
-===
-
-The trp API generates a data structure and functions to handle a
-large growing set of objects stored in a pool.
-
-The caller:
-
-. Specifies parameters for the generated functions with the
- trp_gen(static, foo_, ...) macro.
-
-. Allocates a `struct trp_root` variable and sets it to {~0}.
-
-. Adds new nodes to the set using `foo_insert`. Any pointers
- to existing nodes cannot be relied upon any more, so the caller
- might retrieve them anew with `foo_pointer`.
-
-. Can find a specific item in the set using `foo_search`.
-
-. Can iterate over items in the set using `foo_first` and `foo_next`.
-
-. Can remove an item from the set using `foo_remove`.
-
-Example:
-
-----
-struct ex_node {
- const char *s;
- struct trp_node ex_link;
-};
-static struct trp_root ex_base = {~0};
-obj_pool_gen(ex, struct ex_node, 4096);
-trp_gen(static, ex_, struct ex_node, ex_link, ex, strcmp)
-struct ex_node *item;
-
-item = ex_pointer(ex_alloc(1));
-item->s = "hello";
-ex_insert(&ex_base, item);
-item = ex_pointer(ex_alloc(1));
-item->s = "goodbye";
-ex_insert(&ex_base, item);
-for (item = ex_first(&ex_base); item; item = ex_next(&ex_base, item))
- printf("%s\n", item->s);
-----
-
-Functions
----------
-
-trp_gen(attr, foo_, node_type, link_field, pool, cmp)::
-
- Generate a type-specific treap implementation.
-+
-. The storage class for generated functions will be 'attr' (e.g., `static`).
-. Generated function names are prefixed with 'foo_' (e.g., `treap_`).
-. Treap nodes will be of type 'node_type' (e.g., `struct treap_node`).
- This type must be a struct with at least one `struct trp_node` field
- to point to its children.
-. The field used to access child nodes will be 'link_field'.
-. All treap nodes must lie in the 'pool' object pool.
-. Treap nodes must be totally ordered by the 'cmp' relation, with the
- following prototype:
-+
-int (*cmp)(node_type \*a, node_type \*b)
-+
-and returning a value less than, equal to, or greater than zero
-according to the result of comparison.
-
-node_type {asterisk}foo_insert(struct trp_root *treap, node_type \*node)::
-
- Insert node into treap. If inserted multiple times,
- a node will appear in the treap multiple times.
-+
-The return value is the address of the node within the treap,
-which might differ from `node` if `pool_alloc` had to call
-`realloc` to expand the pool.
-
-void foo_remove(struct trp_root *treap, node_type \*node)::
-
- Remove node from treap. Caller must ensure node is
- present in treap before using this function.
-
-node_type *foo_search(struct trp_root \*treap, node_type \*key)::
-
- Search for a node that matches key. If no match is found,
- result is NULL.
-
-node_type *foo_nsearch(struct trp_root \*treap, node_type \*key)::
-
- Like `foo_search`, but if the key is missing return what
- would be key's successor, were key in treap (NULL if no
- successor).
-
-node_type *foo_first(struct trp_root \*treap)::
-
- Find the first item from the treap, in sorted order.
-
-node_type *foo_next(struct trp_root \*treap, node_type \*node)::
-
- Find the next item.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 14:53:00 +0000