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/*
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
#include "quote.h"
#include "commit.h"
#include "diff.h"
#include "diffcore.h"
#include "revision.h"
/*
* diff-files
*/
int run_diff_files(struct rev_info *revs, int silent_on_removed)
{
int entries, i;
int diff_unmerged_stage = revs->max_count;
if (diff_unmerged_stage < 0)
diff_unmerged_stage = 2;
entries = read_cache();
if (entries < 0) {
perror("read_cache");
return -1;
}
for (i = 0; i < entries; i++) {
struct stat st;
unsigned int oldmode, newmode;
struct cache_entry *ce = active_cache[i];
int changed;
if (!ce_path_match(ce, revs->prune_data))
continue;
if (ce_stage(ce)) {
struct {
struct combine_diff_path p;
struct combine_diff_parent filler[5];
} combine;
int num_compare_stages = 0;
combine.p.next = NULL;
combine.p.len = ce_namelen(ce);
combine.p.path = xmalloc(combine.p.len + 1);
memcpy(combine.p.path, ce->name, combine.p.len);
combine.p.path[combine.p.len] = 0;
combine.p.mode = 0;
memset(combine.p.sha1, 0, 20);
memset(&combine.p.parent[0], 0,
sizeof(combine.filler));
while (i < entries) {
struct cache_entry *nce = active_cache[i];
int stage;
if (strcmp(ce->name, nce->name))
break;
/* Stage #2 (ours) is the first parent,
* stage #3 (theirs) is the second.
*/
stage = ce_stage(nce);
if (2 <= stage) {
int mode = ntohl(nce->ce_mode);
num_compare_stages++;
memcpy(combine.p.parent[stage-2].sha1,
nce->sha1, 20);
combine.p.parent[stage-2].mode =
canon_mode(mode);
combine.p.parent[stage-2].status =
DIFF_STATUS_MODIFIED;
}
/* diff against the proper unmerged stage */
if (stage == diff_unmerged_stage)
ce = nce;
i++;
}
/*
* Compensate for loop update
*/
i--;
if (revs->combine_merges && num_compare_stages == 2) {
show_combined_diff(&combine.p, 2,
revs->dense_combined_merges,
revs);
free(combine.p.path);
continue;
}
free(combine.p.path);
/*
* Show the diff for the 'ce' if we found the one
* from the desired stage.
*/
diff_unmerge(&revs->diffopt, ce->name);
if (ce_stage(ce) != diff_unmerged_stage)
continue;
}
if (lstat(ce->name, &st) < 0) {
if (errno != ENOENT && errno != ENOTDIR) {
perror(ce->name);
continue;
}
if (silent_on_removed)
continue;
diff_addremove(&revs->diffopt, '-', ntohl(ce->ce_mode),
ce->sha1, ce->name, NULL);
continue;
}
changed = ce_match_stat(ce, &st, 0);
if (!changed && !revs->diffopt.find_copies_harder)
continue;
oldmode = ntohl(ce->ce_mode);
newmode = canon_mode(st.st_mode);
if (!trust_executable_bit &&
S_ISREG(newmode) && S_ISREG(oldmode) &&
((newmode ^ oldmode) == 0111))
newmode = oldmode;
diff_change(&revs->diffopt, oldmode, newmode,
ce->sha1, (changed ? null_sha1 : ce->sha1),
ce->name, NULL);
}
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
return 0;
}
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