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Make git-diff-cache skip any comparisons which don't match pathspec

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This brings all the same pathspec optimizations that git-diff-tree does
to git-diff-cache.
This commit is contained in:
Linus Torvalds
2005-07-14 16:43:01 -07:00
parent a74ba54bd1
commit fdee7d07ba
1 changed files with 28 additions and 2 deletions
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30
diff-cache.c
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@ -87,12 +87,37 @@ static int show_modified(struct cache_entry *old,
return 0;
}
static int diff_cache(struct cache_entry **ac, int entries)
static int ce_path_match(const struct cache_entry *ce, const char **pathspec)
{
const char *match, *name;
int len;
if (!pathspec)
return 1;
len = ce_namelen(ce);
name = ce->name;
while ((match = *pathspec++) != NULL) {
int matchlen = strlen(match);
if (matchlen > len)
continue;
if (memcmp(name, match, matchlen))
continue;
if (name[matchlen] == '/' || !name[matchlen])
return 1;
}
return 0;
}
static int diff_cache(struct cache_entry **ac, int entries, const char **pathspec)
{
while (entries) {
struct cache_entry *ce = *ac;
int same = (entries > 1) && ce_same_name(ce, ac[1]);
if (!ce_path_match(ce, pathspec))
goto skip_entry;
switch (ce_stage(ce)) {
case 0:
/* No stage 1 entry? That means it's a new file */
@ -130,6 +155,7 @@ static int diff_cache(struct cache_entry **ac, int entries)
die("impossible cache entry stage");
}
skip_entry:
/*
* Ignore all the different stages for this file,
* we've handled the relevant cases now.
@ -281,7 +307,7 @@ int main(int argc, const char **argv)
if (read_tree(tree, size, 1, pathspec))
die("unable to read tree object %s", tree_name);
ret = diff_cache(active_cache, active_nr);
ret = diff_cache(active_cache, active_nr, pathspec);
diffcore_std(pathspec,
detect_rename, diff_score_opt,