diff options
Diffstat (limited to 'builtin-diff.c')
| -rw-r--r-- | builtin-diff.c | 55 |
1 files changed, 46 insertions, 9 deletions
diff --git a/builtin-diff.c b/builtin-diff.c index 196821294e..c543105b8e 100644 --- a/builtin-diff.c +++ b/builtin-diff.c @@ -47,13 +47,17 @@ static int builtin_diff_files(struct rev_info *revs, } /* * Make sure there are NO revision (i.e. pending object) parameter, - * rev.max_count is reasonable (0 <= n <= 3), - * there is no other revision filtering parameters. + * specified rev.max_count is reasonable (0 <= n <= 3), and + * there is no other revision filtering parameter. */ if (revs->pending_objects || revs->min_age != -1 || - revs->max_age != -1) + revs->max_age != -1 || + 3 < revs->max_count) usage(builtin_diff_usage); + if (revs->max_count < 0 && + (revs->diffopt.output_format == DIFF_FORMAT_PATCH)) + revs->combine_merges = revs->dense_combined_merges = 1; /* * Backward compatibility wart - "diff-files -s" used to * defeat the common diff option "-s" which asked for @@ -178,9 +182,6 @@ static int builtin_diff_tree(struct rev_info *revs, int argc, const char **argv, struct object_list *ent) { - /* We saw two trees, ent[0] and ent[1]. - * unless ent[0] is unintesting, they are swapped - */ const unsigned char *(sha1[2]); int swap = 1; while (1 < argc) { @@ -191,6 +192,10 @@ static int builtin_diff_tree(struct rev_info *revs, usage(builtin_diff_usage); argv++; argc--; } + + /* We saw two trees, ent[0] and ent[1]. + * unless ent[0] is unintesting, they are swapped + */ if (ent[0].item->flags & UNINTERESTING) swap = 0; sha1[swap] = ent[0].item->sha1; @@ -200,6 +205,33 @@ static int builtin_diff_tree(struct rev_info *revs, return 0; } +static int builtin_diff_combined(struct rev_info *revs, + int argc, const char **argv, + struct object_list *ent, + int ents) +{ + const unsigned char (*parent)[20]; + int i; + + while (1 < argc) { + const char *arg = argv[1]; + if (!strcmp(arg, "--raw")) + revs->diffopt.output_format = DIFF_FORMAT_RAW; + else + usage(builtin_diff_usage); + argv++; argc--; + } + if (!revs->dense_combined_merges && !revs->combine_merges) + revs->dense_combined_merges = revs->combine_merges = 1; + parent = xmalloc(ents * sizeof(*parent)); + /* Again, the revs are all reverse */ + for (i = 0; i < ents; i++) + memcpy(parent + i, ent[ents - 1 - i].item->sha1, 20); + diff_tree_combined(parent[0], parent + 1, ents - 1, + revs->dense_combined_merges, revs); + return 0; +} + static void add_head(struct rev_info *revs) { unsigned char sha1[20]; @@ -215,7 +247,7 @@ static void add_head(struct rev_info *revs) int cmd_diff(int argc, const char **argv, char **envp) { struct rev_info rev; - struct object_list *list, ent[2]; + struct object_list *list, ent[100]; int ents = 0, blobs = 0, paths = 0; const char *path = NULL; struct blobinfo blob[2]; @@ -273,8 +305,9 @@ int cmd_diff(int argc, const char **argv, char **envp) if (!strcmp(obj->type, commit_type)) obj = &((struct commit *)obj)->tree->object; if (!strcmp(obj->type, tree_type)) { - if (2 <= ents) - die("more than two trees given: '%s'", name); + if (ARRAY_SIZE(ent) <= ents) + die("more than %d trees given: '%s'", + ARRAY_SIZE(ent), name); obj->flags |= flags; ent[ents].item = obj; ent[ents].name = name; @@ -316,6 +349,8 @@ int cmd_diff(int argc, const char **argv, char **envp) return builtin_diff_b_f(&rev, argc, argv, blob, path); break; case 2: + if (paths) + usage(builtin_diff_usage); return builtin_diff_blobs(&rev, argc, argv, blob); break; default: @@ -328,5 +363,7 @@ int cmd_diff(int argc, const char **argv, char **envp) return builtin_diff_index(&rev, argc, argv); else if (ents == 2) return builtin_diff_tree(&rev, argc, argv, ent); + else + return builtin_diff_combined(&rev, argc, argv, ent, ents); usage(builtin_diff_usage); } |