static int gitdiff_similarity(const char *line, struct patch *patch)
{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
+ unsigned long val = strtoul(line, NULL, 10);
+ if (val <= 100)
+ patch->score = val;
return 0;
}
static int gitdiff_dissimilarity(const char *line, struct patch *patch)
{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
+ unsigned long val = strtoul(line, NULL, 10);
+ if (val <= 100)
+ patch->score = val;
return 0;
}
}
/*
- * Read the patch text in "buffer" taht extends for "size" bytes; stop
+ * 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
char *buf,
size_t len, size_t postlen)
{
- int i, ctx;
+ int i, ctx, reduced;
char *new, *old, *fixed;
struct image fixed_preimage;
* free "oldlines".
*/
prepare_image(&fixed_preimage, buf, len, 1);
- assert(fixed_preimage.nr == preimage->nr);
- for (i = 0; i < preimage->nr; i++)
+ 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 just doing whitespace fixing,
- * which does not make the string grow, but needs a new buffer
- * when ignoring whitespace causes the update, since in this case
- * we could have e.g. tabs converted to multiple spaces.
+ * 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.
*/
else
new = old;
fixed = preimage->buf;
- for (i = ctx = 0; i < postimage->nr; i++) {
+
+ for (i = reduced = 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 */
fixed += preimage->line[ctx].len;
ctx++;
}
- if (preimage->nr <= ctx)
- die(_("oops"));
+
+ /*
+ * 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 */
len = preimage->line[ctx].len;
/* Fix the length of the whole thing */
postimage->len = new - postimage->buf;
+ postimage->nr -= reduced;
}
static int match_fragment(struct image *img,
int i;
char *fixed_buf, *buf, *orig, *target;
struct strbuf fixed;
- size_t fixed_len;
+ size_t fixed_len, postlen;
int preimage_limit;
if (preimage->nr + try_lno <= img->nr) {
strbuf_init(&fixed, preimage->len + 1);
orig = preimage->buf;
target = img->buf + try;
+ postlen = 0;
for (i = 0; i < preimage_limit; i++) {
size_t oldlen = preimage->line[i].len;
size_t tgtlen = img->line[try_lno + i].len;
match = (tgtfix.len == fixed.len - fixstart &&
!memcmp(tgtfix.buf, fixed.buf + fixstart,
fixed.len - fixstart));
+ postlen += tgtfix.len;
strbuf_release(&tgtfix);
if (!match)
* 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, 0);
+ fixed_buf, fixed_len, postlen);
return 1;
unmatch_exit:
*
* 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 presense of B as we
+ * 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)
*
* 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 presense of B should not stop A from getting renamed to
+ * 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().
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 &&
+ !prefixcmp(++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? */
+ !prefixcmp(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)
{
continue;
if (S_ISGITLINK(patch->old_mode)) {
- if (get_sha1_hex(patch->old_sha1_prefix, sha1))
- die("submoule change for %s without full index name",
+ if (!preimage_sha1_in_gitlink_patch(patch, sha1))
+ ; /* ok, the textual part looks sane */
+ else
+ die("sha1 information is lacking or useless for submoule %s",
name);
} else if (!get_sha1_blob(patch->old_sha1_prefix, sha1)) {
; /* ok */