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Add standard interface for file diff functions

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Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit is contained in:
Lars Hjemli 2007-05-13 14:21:19 +02:00
parent 48dc00342e
commit c4ef667961
2 changed files with 86 additions and 0 deletions
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7
cgit.h
View File

@ -20,6 +20,7 @@
typedef void (*configfn)(const char *name, const char *value);
typedef void (*filepair_fn)(struct diff_filepair *pair);
typedef void (*linediff_fn)(char *line, int len);
struct cacheitem {
char *name;
@ -117,9 +118,15 @@ extern int chk_positive(int result, char *msg);
extern int hextoint(char c);
extern void *cgit_free_commitinfo(struct commitinfo *info);
extern int cgit_diff_files(const unsigned char *old_sha1,
const unsigned char *new_sha1,
linediff_fn fn);
extern void cgit_diff_tree(const unsigned char *old_sha1,
const unsigned char *new_sha1,
filepair_fn fn);
extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
extern char *fmt(const char *format,...);

79
shared.c
View File

@ -207,6 +207,85 @@ void cgit_diff_tree_cb(struct diff_queue_struct *q,
}
}
static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
{
enum object_type type;
if (is_null_sha1(sha1)) {
file->ptr = (char *)"";
file->size = 0;
} else {
file->ptr = read_sha1_file(sha1, &type, &file->size);
}
return 1;
}
/*
* Receive diff-buffers from xdiff and concatenate them as
* needed across multiple callbacks.
*
* This is basically a copy of xdiff-interface.c/xdiff_outf(),
* ripped from git and modified to use globals instead of
* a special callback-struct.
*/
char *diffbuf = NULL;
int buflen = 0;
int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
{
int i;
for (i = 0; i < nbuf; i++) {
if (mb[i].ptr[mb[i].size-1] != '\n') {
/* Incomplete line */
diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
buflen += mb[i].size;
continue;
}
/* we have a complete line */
if (!diffbuf) {
((linediff_fn)priv)(mb[i].ptr, mb[i].size);
continue;
}
diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
free(diffbuf);
diffbuf = NULL;
buflen = 0;
}
if (diffbuf) {
((linediff_fn)priv)(diffbuf, buflen);
free(diffbuf);
diffbuf = NULL;
buflen = 0;
}
return 0;
}
int cgit_diff_files(const unsigned char *old_sha1,
const unsigned char *new_sha1,
linediff_fn fn)
{
mmfile_t file1, file2;
xpparam_t diff_params;
xdemitconf_t emit_params;
xdemitcb_t emit_cb;
if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
return 1;
diff_params.flags = XDF_NEED_MINIMAL;
emit_params.ctxlen = 3;
emit_params.flags = XDL_EMIT_FUNCNAMES;
emit_cb.outf = filediff_cb;
emit_cb.priv = fn;
xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
return 0;
}
void cgit_diff_tree(const unsigned char *old_sha1,
const unsigned char *new_sha1,
filepair_fn fn)