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git/diffcore-pathspec.c
Junio C Hamano 6b14d7faf0 [PATCH] Diffcore updates.
This moves the path selection logic from individual programs to a new
diffcore transformer (diff-tree still needs to have its own for
performance reasons).  Also the header printing code in diff-tree was
tweaked not to produce anything when pickaxe is in effect and there is
nothing interesting to report.  An interesting example is the following
in the GIT archive itself:

    $ git-whatchanged -p -C -S'or something in a real script'

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-22 10:17:50 -07:00

63 lines
1.2 KiB
C

/*
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
#include "delta.h"
struct path_spec {
const char *spec;
int len;
};
static int matches_pathspec(const char *name, struct path_spec *s, int cnt)
{
int i;
int namelen;
if (cnt == 0)
return 1;
namelen = strlen(name);
for (i = 0; i < cnt; i++) {
int len = s->len;
if (! strncmp(s->spec, name, len) &&
len <= namelen &&
(name[len] == 0 || name[len] == '/'))
return 1;
}
return 0;
}
void diffcore_pathspec(const char **pathspec)
{
struct diff_queue_struct *q = &diff_queued_diff;
int i, speccnt;
struct diff_queue_struct outq;
struct path_spec *spec;
outq.queue = NULL;
outq.nr = outq.alloc = 0;
for (i = 0; pathspec[i]; i++)
;
speccnt = i;
spec = xmalloc(sizeof(*spec) * speccnt);
for (i = 0; pathspec[i]; i++) {
spec[i].spec = pathspec[i];
spec[i].len = strlen(pathspec[i]);
}
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
if (matches_pathspec(p->one->path, spec, speccnt) ||
matches_pathspec(p->two->path, spec, speccnt))
diff_q(&outq, p);
else
diff_free_filepair(p);
}
free(q->queue);
*q = outq;
return;
}