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-rw-r--r--builtin-apply.c719
1 files changed, 476 insertions, 243 deletions
diff --git a/builtin-apply.c b/builtin-apply.c
index 6a88ff018d..a3f075df4b 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -161,6 +161,84 @@ struct patch {
struct patch *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
+};
+
+/*
+ * 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;
+}
+
+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++;
+}
+
+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);
+ image->buf = NULL;
+ image->len = 0;
+}
+
static void say_patch_name(FILE *output, const char *pre,
struct patch *patch, const char *post)
{
@@ -1437,227 +1515,338 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
}
}
-static int find_offset(const char *buf, unsigned long size,
- const char *fragment, unsigned long fragsize,
- int line, int *lines)
+static void update_pre_post_images(struct image *preimage,
+ struct image *postimage,
+ char *buf,
+ size_t len)
{
- int i;
- unsigned long start, backwards, forwards;
+ int i, ctx;
+ char *new, *old, *fixed;
+ struct image fixed_preimage;
- if (fragsize > size)
- return -1;
+ /*
+ * 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(fixed_preimage.nr == preimage->nr);
+ for (i = 0; i < preimage->nr; i++)
+ fixed_preimage.line[i].flag = preimage->line[i].flag;
+ free(preimage->line_allocated);
+ *preimage = fixed_preimage;
- start = 0;
- if (line > 1) {
- unsigned long offset = 0;
- i = line-1;
- while (offset + fragsize <= size) {
- if (buf[offset++] == '\n') {
- start = offset;
- if (!--i)
- break;
- }
+ /*
+ * Adjust the common context lines in postimage, in place.
+ * This is possible because whitespace fixing does not make
+ * the string grow.
+ */
+ new = old = postimage->buf;
+ fixed = preimage->buf;
+ for (i = ctx = 0; i < postimage->nr; i++) {
+ size_t len = postimage->line[i].len;
+ if (!(postimage->line[i].flag & LINE_COMMON)) {
+ /* an added line -- no counterparts in preimage */
+ memmove(new, old, len);
+ old += len;
+ new += len;
+ continue;
}
+
+ /* a common context -- skip it in the original postimage */
+ old += 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++;
+ }
+ if (preimage->nr <= ctx)
+ die("oops");
+
+ /* and copy it in, while fixing the line length */
+ len = preimage->line[ctx].len;
+ memcpy(new, fixed, len);
+ new += len;
+ fixed += len;
+ postimage->line[i].len = len;
+ ctx++;
}
- /* Exact line number? */
- if ((start + fragsize <= size) &&
- !memcmp(buf + start, fragment, fragsize))
- return start;
+ /* Fix the length of the whole thing */
+ postimage->len = new - postimage->buf;
+}
+
+static int match_fragment(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;
+
+ if (preimage->nr + try_lno > img->nr)
+ return 0;
+
+ if (match_beginning && try_lno)
+ return 0;
+
+ if (match_end && preimage->nr + try_lno != img->nr)
+ return 0;
+
+ /* Quick hash check */
+ for (i = 0; i < preimage->nr; i++)
+ if (preimage->line[i].hash != img->line[try_lno + i].hash)
+ return 0;
+
+ /*
+ * 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;
+
+ if (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.
+ */
+ fixed_buf = xmalloc(preimage->len + 1);
+ buf = fixed_buf;
+ orig = preimage->buf;
+ target = img->buf + try;
+ for (i = 0; i < preimage->nr; i++) {
+ size_t fixlen; /* length after fixing the preimage */
+ size_t oldlen = preimage->line[i].len;
+ size_t tgtlen = img->line[try_lno + i].len;
+ size_t tgtfixlen; /* length after fixing the target line */
+ char tgtfixbuf[1024], *tgtfix;
+ int match;
+
+ /* Try fixing the line in the preimage */
+ fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL);
+
+ /* Try fixing the line in the target */
+ if (sizeof(tgtfixbuf) < tgtlen)
+ tgtfix = tgtfixbuf;
+ else
+ tgtfix = xmalloc(tgtlen);
+ tgtfixlen = 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 = (tgtfixlen == fixlen && !memcmp(tgtfix, buf, fixlen));
+
+ if (tgtfix != tgtfixbuf)
+ free(tgtfix);
+ if (!match)
+ goto unmatch_exit;
+
+ orig += oldlen;
+ buf += fixlen;
+ target += tgtlen;
+ }
+
+ /*
+ * 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.
+ */
+ update_pre_post_images(preimage, postimage,
+ fixed_buf, buf - fixed_buf);
+ return 1;
+
+ unmatch_exit:
+ free(fixed_buf);
+ return 0;
+}
+
+static int find_pos(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 (preimage->nr > img->nr)
+ return -1;
+
+ /*
+ * If match_begining 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;
+
+ if (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 = start;
- forwards = start;
+ backwards = try;
+ backwards_lno = line;
+ forwards = try;
+ forwards_lno = line;
+ try_lno = line;
+
for (i = 0; ; i++) {
- unsigned long try;
- int n;
+ if (match_fragment(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;
- /* "backward" */
if (i & 1) {
- if (!backwards) {
- if (forwards + fragsize > size)
- break;
- continue;
+ if (backwards_lno == 0) {
+ i++;
+ goto again;
}
- do {
- --backwards;
- } while (backwards && buf[backwards-1] != '\n');
+ backwards_lno--;
+ backwards -= img->line[backwards_lno].len;
try = backwards;
+ try_lno = backwards_lno;
} else {
- while (forwards + fragsize <= size) {
- if (buf[forwards++] == '\n')
- break;
+ if (forwards_lno == img->nr) {
+ i++;
+ goto again;
}
+ forwards += img->line[forwards_lno].len;
+ forwards_lno++;
try = forwards;
+ try_lno = forwards_lno;
}
- if (try + fragsize > size)
- continue;
- if (memcmp(buf + try, fragment, fragsize))
- continue;
- n = (i >> 1)+1;
- if (i & 1)
- n = -n;
- *lines = n;
- return try;
}
-
- /*
- * We should start searching forward and backward.
- */
return -1;
}
-static void remove_first_line(const char **rbuf, int *rsize)
+static void remove_first_line(struct image *img)
{
- const char *buf = *rbuf;
- int size = *rsize;
- unsigned long offset;
- offset = 0;
- while (offset <= size) {
- if (buf[offset++] == '\n')
- break;
- }
- *rsize = size - offset;
- *rbuf = buf + offset;
+ img->buf += img->line[0].len;
+ img->len -= img->line[0].len;
+ img->line++;
+ img->nr--;
}
-static void remove_last_line(const char **rbuf, int *rsize)
+static void remove_last_line(struct image *img)
{
- const char *buf = *rbuf;
- int size = *rsize;
- unsigned long offset;
- offset = size - 1;
- while (offset > 0) {
- if (buf[--offset] == '\n')
- break;
- }
- *rsize = offset + 1;
+ img->len -= img->line[--img->nr].len;
}
-static int apply_line(char *output, const char *patch, int plen,
- unsigned ws_rule)
+static void update_image(struct image *img,
+ int applied_pos,
+ struct image *preimage,
+ struct image *postimage)
{
/*
- * plen is number of bytes to be copied from patch,
- * starting at patch+1 (patch[0] is '+'). Typically
- * patch[plen] is '\n', unless this is the incomplete
- * last line.
+ * remove the copy of preimage at offset in img
+ * and replace it with postimage
*/
- int i;
- int add_nl_to_tail = 0;
- int fixed = 0;
- int last_tab_in_indent = 0;
- int last_space_in_indent = 0;
- int need_fix_leading_space = 0;
- char *buf;
-
- if ((ws_error_action != correct_ws_error) || !whitespace_error ||
- *patch != '+') {
- memcpy(output, patch + 1, plen);
- return plen;
- }
-
- /*
- * Strip trailing whitespace
- */
- if ((ws_rule & WS_TRAILING_SPACE) &&
- (1 < plen && isspace(patch[plen-1]))) {
- if (patch[plen] == '\n')
- add_nl_to_tail = 1;
- plen--;
- while (0 < plen && isspace(patch[plen]))
- plen--;
- fixed = 1;
- }
-
- /*
- * Check leading whitespaces (indent)
- */
- for (i = 1; i < plen; i++) {
- char ch = patch[i];
- if (ch == '\t') {
- last_tab_in_indent = i;
- if ((ws_rule & WS_SPACE_BEFORE_TAB) &&
- 0 < last_space_in_indent)
- need_fix_leading_space = 1;
- } else if (ch == ' ') {
- last_space_in_indent = i;
- if ((ws_rule & WS_INDENT_WITH_NON_TAB) &&
- 8 <= i - last_tab_in_indent)
- need_fix_leading_space = 1;
- }
- else
- break;
- }
-
- buf = output;
- if (need_fix_leading_space) {
- int consecutive_spaces = 0;
- int last = last_tab_in_indent + 1;
-
- if (ws_rule & WS_INDENT_WITH_NON_TAB) {
- /* have "last" point at one past the indent */
- if (last_tab_in_indent < last_space_in_indent)
- last = last_space_in_indent + 1;
- else
- last = last_tab_in_indent + 1;
- }
+ int i, nr;
+ size_t remove_count, insert_count, applied_at = 0;
+ char *result;
+ for (i = 0; i < applied_pos; i++)
+ applied_at += img->line[i].len;
+
+ remove_count = 0;
+ for (i = 0; i < preimage->nr; i++)
+ remove_count += img->line[applied_pos + i].len;
+ insert_count = postimage->len;
+
+ /* Adjust the contents */
+ result = xmalloc(img->len + insert_count - remove_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->nr;
+ if (preimage->nr < postimage->nr) {
/*
- * between patch[1..last], strip the funny spaces,
- * updating them to tab as needed.
+ * NOTE: this knows that we never call remove_first_line()
+ * on anything other than pre/post image.
*/
- for (i = 1; i < last; i++, plen--) {
- char ch = patch[i];
- if (ch != ' ') {
- consecutive_spaces = 0;
- *output++ = ch;
- } else {
- consecutive_spaces++;
- if (consecutive_spaces == 8) {
- *output++ = '\t';
- consecutive_spaces = 0;
- }
- }
- }
- while (0 < consecutive_spaces--)
- *output++ = ' ';
- fixed = 1;
- i = last;
+ img->line = xrealloc(img->line, nr * sizeof(*img->line));
+ img->line_allocated = img->line;
}
- else
- i = 1;
-
- memcpy(output, patch + i, plen);
- if (add_nl_to_tail)
- output[plen++] = '\n';
- if (fixed)
- applied_after_fixing_ws++;
- return output + plen - buf;
+ if (preimage->nr != postimage->nr)
+ memmove(img->line + applied_pos + postimage->nr,
+ img->line + applied_pos + preimage->nr,
+ (img->nr - (applied_pos + preimage->nr)) *
+ sizeof(*img->line));
+ memcpy(img->line + applied_pos,
+ postimage->line,
+ postimage->nr * sizeof(*img->line));
+ img->nr = nr;
}
-static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
+static int apply_one_fragment(struct image *img, struct fragment *frag,
int inaccurate_eof, unsigned ws_rule)
{
int match_beginning, match_end;
const char *patch = frag->patch;
- int offset, size = frag->size;
- char *old = xmalloc(size);
- char *new = xmalloc(size);
- const char *oldlines, *newlines;
- int oldsize = 0, newsize = 0;
+ int size = frag->size;
+ char *old, *new, *oldlines, *newlines;
int new_blank_lines_at_end = 0;
unsigned long leading, trailing;
- int pos, lines;
+ int pos, applied_pos;
+ struct image preimage;
+ struct image postimage;
+
+ memset(&preimage, 0, sizeof(preimage));
+ memset(&postimage, 0, sizeof(postimage));
+ oldlines = xmalloc(size);
+ newlines = xmalloc(size);
+ old = oldlines;
+ new = newlines;
while (size > 0) {
char first;
int len = linelen(patch, size);
- int plen;
+ int plen, added;
int added_blank_line = 0;
if (!len)
@@ -1670,7 +1859,7 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
* followed by "\ No newline", then we also remove the
* last one (which is the newline, of course).
*/
- plen = len-1;
+ plen = len - 1;
if (len < size && patch[len] == '\\')
plen--;
first = *patch;
@@ -1687,25 +1876,40 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
if (plen < 0)
/* ... followed by '\No newline'; nothing */
break;
- old[oldsize++] = '\n';
- new[newsize++] = '\n';
+ *old++ = '\n';
+ *new++ = '\n';
+ add_line_info(&preimage, "\n", 1, LINE_COMMON);
+ add_line_info(&postimage, "\n", 1, LINE_COMMON);
break;
case ' ':
case '-':
- memcpy(old + oldsize, patch + 1, plen);
- oldsize += plen;
+ memcpy(old, patch + 1, plen);
+ add_line_info(&preimage, old, plen,
+ (first == ' ' ? LINE_COMMON : 0));
+ old += plen;
if (first == '-')
break;
/* Fall-through for ' ' */
case '+':
- if (first != '+' || !no_add) {
- int added = apply_line(new + newsize, patch,
- plen, ws_rule);
- newsize += added;
- if (first == '+' &&
- added == 1 && new[newsize-1] == '\n')
- added_blank_line = 1;
+ /* --no-add does not add new lines */
+ if (first == '+' && no_add)
+ break;
+
+ if (first != '+' ||
+ !whitespace_error ||
+ ws_error_action != correct_ws_error) {
+ memcpy(new, patch + 1, plen);
+ added = plen;
}
+ else {
+ added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws);
+ }
+ add_line_info(&postimage, new, added,
+ (first == '+' ? 0 : LINE_COMMON));
+ new += added;
+ if (first == '+' &&
+ added == 1 && new[-1] == '\n')
+ added_blank_line = 1;
break;
case '@': case '\\':
/* Ignore it, we already handled it */
@@ -1722,16 +1926,13 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
patch += len;
size -= len;
}
-
if (inaccurate_eof &&
- oldsize > 0 && old[oldsize - 1] == '\n' &&
- newsize > 0 && new[newsize - 1] == '\n') {
- oldsize--;
- newsize--;
+ old > oldlines && old[-1] == '\n' &&
+ new > newlines && new[-1] == '\n') {
+ old--;
+ new--;
}
- oldlines = old;
- newlines = new;
leading = frag->leading;
trailing = frag->trailing;
@@ -1752,33 +1953,21 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
match_end = !trailing;
}
- lines = 0;
- pos = frag->newpos;
+ pos = frag->newpos ? (frag->newpos - 1) : 0;
+ preimage.buf = oldlines;
+ preimage.len = old - oldlines;
+ postimage.buf = newlines;
+ postimage.len = new - newlines;
+ preimage.line = preimage.line_allocated;
+ postimage.line = postimage.line_allocated;
+
for (;;) {
- offset = find_offset(buf->buf, buf->len,
- oldlines, oldsize, pos, &lines);
- if (match_end && offset + oldsize != buf->len)
- offset = -1;
- if (match_beginning && offset)
- offset = -1;
- if (offset >= 0) {
- if (ws_error_action == correct_ws_error &&
- (buf->len - oldsize - offset == 0)) /* end of file? */
- newsize -= new_blank_lines_at_end;
-
- /* Warn if it was necessary to reduce the number
- * of context lines.
- */
- if ((leading != frag->leading) ||
- (trailing != frag->trailing))
- fprintf(stderr, "Context reduced to (%ld/%ld)"
- " to apply fragment at %d\n",
- leading, trailing, pos + lines);
-
- strbuf_splice(buf, offset, oldsize, newlines, newsize);
- offset = 0;
+
+ applied_pos = find_pos(img, &preimage, &postimage, pos,
+ ws_rule, match_beginning, match_end);
+
+ if (applied_pos >= 0)
break;
- }
/* Am I at my context limits? */
if ((leading <= p_context) && (trailing <= p_context))
@@ -1787,33 +1976,64 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
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(&oldlines, &oldsize);
- remove_first_line(&newlines, &newsize);
+ remove_first_line(&preimage);
+ remove_first_line(&postimage);
pos--;
leading--;
}
if (trailing > leading) {
- remove_last_line(&oldlines, &oldsize);
- remove_last_line(&newlines, &newsize);
+ remove_last_line(&preimage);
+ remove_last_line(&postimage);
trailing--;
}
}
- if (offset && apply_verbosely)
- error("while searching for:\n%.*s", oldsize, oldlines);
+ if (applied_pos >= 0) {
+ if (ws_error_action == correct_ws_error &&
+ new_blank_lines_at_end &&
+ postimage.nr + applied_pos == img->nr) {
+ /*
+ * If the patch application adds blank lines
+ * at the end, and if the patch applies at the
+ * end of the image, remove those added blank
+ * lines.
+ */
+ while (new_blank_lines_at_end--)
+ remove_last_line(&postimage);
+ }
- free(old);
- free(new);
- return offset;
+ /*
+ * Warn if it was necessary to reduce the number
+ * of context lines.
+ */
+ if ((leading != frag->leading) ||
+ (trailing != frag->trailing))
+ fprintf(stderr, "Context reduced to (%ld/%ld)"
+ " to apply fragment at %d\n",
+ leading, trailing, applied_pos+1);
+ update_image(img, applied_pos, &preimage, &postimage);
+ } else {
+ if (apply_verbosely)
+ error("while searching for:\n%.*s",
+ (int)(old - oldlines), oldlines);
+ }
+
+ free(oldlines);
+ free(newlines);
+ free(preimage.line_allocated);
+ free(postimage.line_allocated);
+
+ return (applied_pos < 0);
}
-static int apply_binary_fragment(struct strbuf *buf, struct patch *patch)
+static int apply_binary_fragment(struct image *img, struct patch *patch)
{
struct fragment *fragment = patch->fragments;
unsigned long len;
@@ -1830,22 +2050,26 @@ static int apply_binary_fragment(struct strbuf *buf, struct patch *patch)
}
switch (fragment->binary_patch_method) {
case BINARY_DELTA_DEFLATED:
- dst = patch_delta(buf->buf, buf->len, fragment->patch,
+ dst = patch_delta(img->buf, img->len, fragment->patch,
fragment->size, &len);
if (!dst)
return -1;
- /* XXX patch_delta NUL-terminates */
- strbuf_attach(buf, dst, len, len + 1);
+ clear_image(img);
+ img->buf = dst;
+ img->len = len;
return 0;
case BINARY_LITERAL_DEFLATED:
- strbuf_reset(buf);
- strbuf_add(buf, fragment->patch, fragment->size);
+ clear_image(img);
+ img->len = fragment->size;
+ img->buf = xmalloc(img->len+1);
+ memcpy(img->buf, fragment->patch, img->len);
+ img->buf[img->len] = '\0';
return 0;
}
return -1;
}
-static int apply_binary(struct strbuf *buf, struct patch *patch)
+static int apply_binary(struct image *img, struct patch *patch)
{
const char *name = patch->old_name ? patch->old_name : patch->new_name;
unsigned char sha1[20];
@@ -1866,7 +2090,7 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
* See if the old one matches what the patch
* applies to.
*/
- hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
+ 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 "
@@ -1875,14 +2099,14 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
}
else {
/* Otherwise, the old one must be empty. */
- if (buf->len)
+ 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)) {
- strbuf_release(buf);
+ clear_image(img);
return 0; /* deletion patch */
}
@@ -1897,20 +2121,21 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
return error("the necessary postimage %s for "
"'%s' cannot be read",
patch->new_sha1_prefix, name);
- /* XXX read_sha1_file NUL-terminates */
- strbuf_attach(buf, result, size, size + 1);
+ 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(buf, patch))
+ if (apply_binary_fragment(img, patch))
return error("binary patch does not apply to '%s'",
name);
/* verify that the result matches */
- hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
+ 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));
@@ -1919,7 +2144,7 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
return 0;
}
-static int apply_fragments(struct strbuf *buf, struct patch *patch)
+static int apply_fragments(struct image *img, struct patch *patch)
{
struct fragment *frag = patch->fragments;
const char *name = patch->old_name ? patch->old_name : patch->new_name;
@@ -1927,10 +2152,10 @@ static int apply_fragments(struct strbuf *buf, struct patch *patch)
unsigned inaccurate_eof = patch->inaccurate_eof;
if (patch->is_binary)
- return apply_binary(buf, patch);
+ return apply_binary(img, patch);
while (frag) {
- if (apply_one_fragment(buf, frag, inaccurate_eof, ws_rule)) {
+ if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) {
error("patch failed: %s:%ld", name, frag->oldpos);
if (!apply_with_reject)
return -1;
@@ -1966,6 +2191,9 @@ static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
{
struct strbuf buf;
+ struct image image;
+ size_t len;
+ char *img;
strbuf_init(&buf, 0);
if (cached) {
@@ -1988,9 +2216,14 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
}
}
- if (apply_fragments(&buf, patch) < 0)
+ img = strbuf_detach(&buf, &len);
+ prepare_image(&image, img, len, !patch->is_binary);
+
+ if (apply_fragments(&image, patch) < 0)
return -1; /* note with --reject this succeeds. */
- patch->result = strbuf_detach(&buf, &patch->resultsize);
+ patch->result = image.buf;
+ patch->resultsize = image.len;
+ free(image.line_allocated);
if (0 < patch->is_delete && patch->resultsize)
return error("removal patch leaves file contents");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 10:03:54 +0000