Merge branch 'rs/diff-tree-combined-clean-up'

* rs/diff-tree-combined-clean-up:
  submodule: use diff_tree_combined_merge() instead of diff_tree_combined()
  pass struct commit to diff_tree_combined_merge()
  use struct sha1_array in diff_tree_combined()

5 files changed, 29 insertions, 50 deletions

diff --git a/builtin/diff.c b/builtin/diff.c
index 0fe638fc45..387afa7568 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -14,6 +14,7 @@
 #include "log-tree.h"
 #include "builtin.h"
 #include "submodule.h"
+#include "sha1-array.h"
 
 struct blobinfo {
 	unsigned char sha1[20];
@@ -169,7 +170,7 @@ static int builtin_diff_combined(struct rev_info *revs,
 				 struct object_array_entry *ent,
 				 int ents)
 {
-	const unsigned char (*parent)[20];
+	struct sha1_array parents = SHA1_ARRAY_INIT;
 	int i;
 
 	if (argc > 1)
@@ -177,12 +178,11 @@ static int builtin_diff_combined(struct rev_info *revs,
 
 	if (!revs->dense_combined_merges && !revs->combine_merges)
 		revs->dense_combined_merges = revs->combine_merges = 1;
-	parent = xmalloc(ents * sizeof(*parent));
-	for (i = 0; i < ents; i++)
-		hashcpy((unsigned char *)(parent + i), ent[i].item->sha1);
-	diff_tree_combined(parent[0], parent + 1, ents - 1,
+	for (i = 1; i < ents; i++)
+		sha1_array_append(&parents, ent[i].item->sha1);
+	diff_tree_combined(ent[0].item->sha1, &parents,
 			   revs->dense_combined_merges, revs);
-	free((void *)parent);
+	sha1_array_clear(&parents);
 	return 0;
 }
 
diff --git a/combine-diff.c b/combine-diff.c
index 214014dc64..a2e8dcf855 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -8,6 +8,7 @@
 #include "log-tree.h"
 #include "refs.h"
 #include "userdiff.h"
+#include "sha1-array.h"
 
 static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent)
 {
@@ -1116,15 +1117,14 @@ static void handle_combined_callback(struct diff_options *opt,
 }
 
 void diff_tree_combined(const unsigned char *sha1,
-			const unsigned char parent[][20],
-			int num_parent,
+			const struct sha1_array *parents,
 			int dense,
 			struct rev_info *rev)
 {
 	struct diff_options *opt = &rev->diffopt;
 	struct diff_options diffopts;
 	struct combine_diff_path *p, *paths = NULL;
-	int i, num_paths, needsep, show_log_first;
+	int i, num_paths, needsep, show_log_first, num_parent = parents->nr;
 
 	diffopts = *opt;
 	diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
@@ -1144,7 +1144,7 @@ void diff_tree_combined(const unsigned char *sha1,
 			diffopts.output_format = stat_opt;
 		else
 			diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
-		diff_tree_sha1(parent[i], sha1, "", &diffopts);
+		diff_tree_sha1(parents->sha1[i], sha1, "", &diffopts);
 		diffcore_std(&diffopts);
 		paths = intersect_paths(paths, i, num_parent);
 
@@ -1196,25 +1196,16 @@ void diff_tree_combined(const unsigned char *sha1,
 	}
 }
 
-void diff_tree_combined_merge(const unsigned char *sha1,
-			     int dense, struct rev_info *rev)
+void diff_tree_combined_merge(const struct commit *commit, int dense,
+			      struct rev_info *rev)
 {
-	int num_parent;
-	const unsigned char (*parent)[20];
-	struct commit *commit = lookup_commit(sha1);
-	struct commit_list *parents;
-
-	/* count parents */
-	for (parents = commit->parents, num_parent = 0;
-	     parents;
-	     parents = parents->next, num_parent++)
-		; /* nothing */
-
-	parent = xmalloc(num_parent * sizeof(*parent));
-	for (parents = commit->parents, num_parent = 0;
-	     parents;
-	     parents = parents->next, num_parent++)
-		hashcpy((unsigned char *)(parent + num_parent),
-			parents->item->object.sha1);
-	diff_tree_combined(sha1, parent, num_parent, dense, rev);
+	struct commit_list *parent = commit->parents;
+	struct sha1_array parents = SHA1_ARRAY_INIT;
+
+	while (parent) {
+		sha1_array_append(&parents, parent->item->object.sha1);
+		parent = parent->next;
+	}
+	diff_tree_combined(commit->object.sha1, &parents, dense, rev);
+	sha1_array_clear(&parents);
 }
diff --git a/diff.h b/diff.h
index 0c51724493..ae71f4ccf9 100644
--- a/diff.h
+++ b/diff.h
@@ -12,6 +12,8 @@ struct diff_queue_struct;
 struct strbuf;
 struct diff_filespec;
 struct userdiff_driver;
+struct sha1_array;
+struct commit;
 
 typedef void (*change_fn_t)(struct diff_options *options,
 		 unsigned old_mode, unsigned new_mode,
@@ -195,9 +197,9 @@ struct combine_diff_path {
 extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 			      int dense, struct rev_info *);
 
-extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
+extern void diff_tree_combined(const unsigned char *sha1, const struct sha1_array *parents, int dense, struct rev_info *rev);
 
-extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
+extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
 
 void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
 
diff --git a/log-tree.c b/log-tree.c
index e7694a3a4c..319bd31e2b 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -599,9 +599,7 @@ int log_tree_diff_flush(struct rev_info *opt)
 
 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 {
-	unsigned const char *sha1 = commit->object.sha1;
-
-	diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
+	diff_tree_combined_merge(commit, opt->dense_combined_merges, opt);
 	return !opt->loginfo;
 }
 
diff --git a/submodule.c b/submodule.c
index 68c1ba90b9..9a28060679 100644
--- a/submodule.c
+++ b/submodule.c
@@ -371,27 +371,15 @@ static void collect_submodules_from_diff(struct diff_queue_struct *q,
 }
 
 
-static void commit_need_pushing(struct commit *commit, struct commit_list *parent, int *needs_pushing)
+static void commit_need_pushing(struct commit *commit, int *needs_pushing)
 {
-	const unsigned char (*parents)[20];
-	unsigned int i, n;
 	struct rev_info rev;
 
-	n = commit_list_count(parent);
-	parents = xmalloc(n * sizeof(*parents));
-
-	for (i = 0; i < n; i++) {
-		hashcpy((unsigned char *)(parents + i), parent->item->object.sha1);
-		parent = parent->next;
-	}
-
 	init_revisions(&rev, NULL);
 	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
 	rev.diffopt.format_callback = collect_submodules_from_diff;
 	rev.diffopt.format_callback_data = needs_pushing;
-	diff_tree_combined(commit->object.sha1, parents, n, 1, &rev);
-
-	free((void *)parents);
+	diff_tree_combined_merge(commit, 1, &rev);
 }
 
 int check_submodule_needs_pushing(unsigned char new_sha1[20], const char *remotes_name)
@@ -414,7 +402,7 @@ int check_submodule_needs_pushing(unsigned char new_sha1[20], const char *remote
 		die("revision walk setup failed");
 
 	while ((commit = get_revision(&rev)) && !needs_pushing)
-		commit_need_pushing(commit, commit->parents, &needs_pushing);
+		commit_need_pushing(commit, &needs_pushing);
 
 	free(sha1_copy);
 	strbuf_release(&remotes_arg);