9ccd0a88ac
We're going to be adding some parameters to this, so we can't have any uninitialized data in it. Signed-off-by: Brian Downing <bdowning@lavos.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
#include "cache.h"
|
|
#include "run-command.h"
|
|
#include "xdiff-interface.h"
|
|
#include "blob.h"
|
|
|
|
static int fill_mmfile_blob(mmfile_t *f, struct blob *obj)
|
|
{
|
|
void *buf;
|
|
unsigned long size;
|
|
enum object_type type;
|
|
|
|
buf = read_sha1_file(obj->object.sha1, &type, &size);
|
|
if (!buf)
|
|
return -1;
|
|
if (type != OBJ_BLOB)
|
|
return -1;
|
|
f->ptr = buf;
|
|
f->size = size;
|
|
return 0;
|
|
}
|
|
|
|
static void free_mmfile(mmfile_t *f)
|
|
{
|
|
free(f->ptr);
|
|
}
|
|
|
|
static void *three_way_filemerge(mmfile_t *base, mmfile_t *our, mmfile_t *their, unsigned long *size)
|
|
{
|
|
mmbuffer_t res;
|
|
xpparam_t xpp;
|
|
int merge_status;
|
|
|
|
memset(&xpp, 0, sizeof(xpp));
|
|
merge_status = xdl_merge(base, our, ".our", their, ".their",
|
|
&xpp, XDL_MERGE_ZEALOUS, &res);
|
|
|
|
if (merge_status < 0)
|
|
return NULL;
|
|
|
|
*size = res.size;
|
|
return res.ptr;
|
|
}
|
|
|
|
static int common_outf(void *priv_, mmbuffer_t *mb, int nbuf)
|
|
{
|
|
int i;
|
|
mmfile_t *dst = priv_;
|
|
|
|
for (i = 0; i < nbuf; i++) {
|
|
memcpy(dst->ptr + dst->size, mb[i].ptr, mb[i].size);
|
|
dst->size += mb[i].size;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int generate_common_file(mmfile_t *res, mmfile_t *f1, mmfile_t *f2)
|
|
{
|
|
unsigned long size = f1->size < f2->size ? f1->size : f2->size;
|
|
void *ptr = xmalloc(size);
|
|
xpparam_t xpp;
|
|
xdemitconf_t xecfg;
|
|
xdemitcb_t ecb;
|
|
|
|
memset(&xpp, 0, sizeof(xpp));
|
|
xpp.flags = XDF_NEED_MINIMAL;
|
|
memset(&xecfg, 0, sizeof(xecfg));
|
|
xecfg.ctxlen = 3;
|
|
xecfg.flags = XDL_EMIT_COMMON;
|
|
ecb.outf = common_outf;
|
|
|
|
res->ptr = ptr;
|
|
res->size = 0;
|
|
|
|
ecb.priv = res;
|
|
return xdi_diff(f1, f2, &xpp, &xecfg, &ecb);
|
|
}
|
|
|
|
void *merge_file(struct blob *base, struct blob *our, struct blob *their, unsigned long *size)
|
|
{
|
|
void *res = NULL;
|
|
mmfile_t f1, f2, common;
|
|
|
|
/*
|
|
* Removed in either branch?
|
|
*
|
|
* NOTE! This depends on the caller having done the
|
|
* proper warning about removing a file that got
|
|
* modified in the other branch!
|
|
*/
|
|
if (!our || !their) {
|
|
enum object_type type;
|
|
if (base)
|
|
return NULL;
|
|
if (!our)
|
|
our = their;
|
|
return read_sha1_file(our->object.sha1, &type, size);
|
|
}
|
|
|
|
if (fill_mmfile_blob(&f1, our) < 0)
|
|
goto out_no_mmfile;
|
|
if (fill_mmfile_blob(&f2, their) < 0)
|
|
goto out_free_f1;
|
|
|
|
if (base) {
|
|
if (fill_mmfile_blob(&common, base) < 0)
|
|
goto out_free_f2_f1;
|
|
} else {
|
|
if (generate_common_file(&common, &f1, &f2) < 0)
|
|
goto out_free_f2_f1;
|
|
}
|
|
res = three_way_filemerge(&common, &f1, &f2, size);
|
|
free_mmfile(&common);
|
|
out_free_f2_f1:
|
|
free_mmfile(&f2);
|
|
out_free_f1:
|
|
free_mmfile(&f1);
|
|
out_no_mmfile:
|
|
return res;
|
|
}
|