Teach revision walking machinery to walk multiple times sequencially

diff --git a/combine-diff.c b/combine-diff.c
index 214014dc645e43ae257e46f1046c8ca0d21d3472..a2e8dcf8553ff15d7cfed8f8ec4735185ec162bb 100644 (file)
--- 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);
 }