continue;
if (ce_stage(ce)) {
- struct {
- struct combine_diff_path p;
- struct combine_diff_parent filler[5];
- } combine;
+ struct combine_diff_path *dpath;
int num_compare_stages = 0;
+ size_t path_len;
- 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));
+ path_len = ce_namelen(ce);
+
+ dpath = xmalloc (combine_diff_path_size (5, path_len));
+ dpath->path = (char *) &(dpath->parent[5]);
+
+ dpath->next = NULL;
+ dpath->len = path_len;
+ memcpy(dpath->path, ce->name, path_len);
+ dpath->path[path_len] = '\0';
+ dpath->mode = 0;
+ memset(dpath->sha1, 0, 20);
+ memset(&(dpath->parent[0]), 0,
+ sizeof(struct combine_diff_parent)*5);
while (i < entries) {
struct cache_entry *nce = active_cache[i];
if (2 <= stage) {
int mode = ntohl(nce->ce_mode);
num_compare_stages++;
- memcpy(combine.p.parent[stage-2].sha1,
+ memcpy(dpath->parent[stage-2].sha1,
nce->sha1, 20);
- combine.p.parent[stage-2].mode =
+ dpath->parent[stage-2].mode =
canon_mode(mode);
- combine.p.parent[stage-2].status =
+ dpath->parent[stage-2].status =
DIFF_STATUS_MODIFIED;
}
i--;
if (revs->combine_merges && num_compare_stages == 2) {
- show_combined_diff(&combine.p, 2,
+ show_combined_diff(dpath, 2,
revs->dense_combined_merges,
revs);
- free(combine.p.path);
+ free(dpath);
continue;
}
- free(combine.p.path);
+ free(dpath);
+ dpath = NULL;
/*
* Show the diff for the 'ce' if we found the one
return 0;
}
+/*
+ * diff-index
+ */
+
+/* A file entry went away or appeared */
+static void diff_index_show_file(struct rev_info *revs,
+ const char *prefix,
+ struct cache_entry *ce,
+ unsigned char *sha1, unsigned int mode)
+{
+ diff_addremove(&revs->diffopt, prefix[0], ntohl(mode),
+ sha1, ce->name, NULL);
+}
+
+static int get_stat_data(struct cache_entry *ce,
+ unsigned char **sha1p,
+ unsigned int *modep,
+ int cached, int match_missing)
+{
+ unsigned char *sha1 = ce->sha1;
+ unsigned int mode = ce->ce_mode;
+
+ if (!cached) {
+ static unsigned char no_sha1[20];
+ int changed;
+ struct stat st;
+ if (lstat(ce->name, &st) < 0) {
+ if (errno == ENOENT && match_missing) {
+ *sha1p = sha1;
+ *modep = mode;
+ return 0;
+ }
+ return -1;
+ }
+ changed = ce_match_stat(ce, &st, 0);
+ if (changed) {
+ mode = create_ce_mode(st.st_mode);
+ if (!trust_executable_bit && S_ISREG(st.st_mode))
+ mode = ce->ce_mode;
+ sha1 = no_sha1;
+ }
+ }
+
+ *sha1p = sha1;
+ *modep = mode;
+ return 0;
+}
+
+static void show_new_file(struct rev_info *revs,
+ struct cache_entry *new,
+ int cached, int match_missing)
+{
+ unsigned char *sha1;
+ unsigned int mode;
+
+ /* New file in the index: it might actually be different in
+ * the working copy.
+ */
+ if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0)
+ return;
+
+ diff_index_show_file(revs, "+", new, sha1, mode);
+}
+
+static int show_modified(struct rev_info *revs,
+ struct cache_entry *old,
+ struct cache_entry *new,
+ int report_missing,
+ int cached, int match_missing)
+{
+ unsigned int mode, oldmode;
+ unsigned char *sha1;
+
+ if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0) {
+ if (report_missing)
+ diff_index_show_file(revs, "-", old,
+ old->sha1, old->ce_mode);
+ return -1;
+ }
+
+ oldmode = old->ce_mode;
+ if (mode == oldmode && !memcmp(sha1, old->sha1, 20) &&
+ !revs->diffopt.find_copies_harder)
+ return 0;
+
+ mode = ntohl(mode);
+ oldmode = ntohl(oldmode);
+
+ diff_change(&revs->diffopt, oldmode, mode,
+ old->sha1, sha1, old->name, NULL);
+ return 0;
+}
+
+static int diff_cache(struct rev_info *revs,
+ struct cache_entry **ac, int entries,
+ const char **pathspec,
+ int cached, int match_missing)
+{
+ 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 */
+ if (!same) {
+ show_new_file(revs, ce, cached, match_missing);
+ break;
+ }
+ /* Show difference between old and new */
+ show_modified(revs,ac[1], ce, 1,
+ cached, match_missing);
+ break;
+ case 1:
+ /* No stage 3 (merge) entry?
+ * That means it's been deleted.
+ */
+ if (!same) {
+ diff_index_show_file(revs, "-", ce,
+ ce->sha1, ce->ce_mode);
+ break;
+ }
+ /* We come here with ce pointing at stage 1
+ * (original tree) and ac[1] pointing at stage
+ * 3 (unmerged). show-modified with
+ * report-missing set to false does not say the
+ * file is deleted but reports true if work
+ * tree does not have it, in which case we
+ * fall through to report the unmerged state.
+ * Otherwise, we show the differences between
+ * the original tree and the work tree.
+ */
+ if (!cached &&
+ !show_modified(revs, ce, ac[1], 0,
+ cached, match_missing))
+ break;
+ /* fallthru */
+ case 3:
+ diff_unmerge(&revs->diffopt, ce->name);
+ break;
+
+ default:
+ die("impossible cache entry stage");
+ }
+
+skip_entry:
+ /*
+ * Ignore all the different stages for this file,
+ * we've handled the relevant cases now.
+ */
+ do {
+ ac++;
+ entries--;
+ } while (entries && ce_same_name(ce, ac[0]));
+ }
+ return 0;
+}
+
+/*
+ * This turns all merge entries into "stage 3". That guarantees that
+ * when we read in the new tree (into "stage 1"), we won't lose sight
+ * of the fact that we had unmerged entries.
+ */
+static void mark_merge_entries(void)
+{
+ int i;
+ for (i = 0; i < active_nr; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (!ce_stage(ce))
+ continue;
+ ce->ce_flags |= htons(CE_STAGEMASK);
+ }
+}
+
+int run_diff_index(struct rev_info *revs, int cached)
+{
+ int ret;
+ struct object *ent;
+ struct tree *tree;
+ const char *tree_name;
+ int match_missing = 0;
+
+ /*
+ * Backward compatibility wart - "diff-index -m" does
+ * not mean "do not ignore merges", but totally different.
+ */
+ if (!revs->ignore_merges)
+ match_missing = 1;
+
+ if (read_cache() < 0) {
+ perror("read_cache");
+ return -1;
+ }
+ mark_merge_entries();
+
+ ent = revs->pending.objects[0].item;
+ tree_name = revs->pending.objects[0].name;
+ tree = parse_tree_indirect(ent->sha1);
+ if (!tree)
+ return error("bad tree object %s", tree_name);
+ if (read_tree(tree, 1, revs->prune_data))
+ return error("unable to read tree object %s", tree_name);
+ ret = diff_cache(revs, active_cache, active_nr, revs->prune_data,
+ cached, match_missing);
+ diffcore_std(&revs->diffopt);
+ diff_flush(&revs->diffopt);
+ return ret;
+}