X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=merge-tree.c;h=50528d5e438c62be409a9f7d252cedadfd52b15e;hb=5f2f4240022418e9a75505f11298db54a5da12d2;hp=6381118fe5dd4bca7d31f5385b3eee872112cf1d;hpb=01df529722618a78d2acf6159c7b1e65f565cabc;p=git.git

diff --git a/merge-tree.c b/merge-tree.c
index 6381118f..50528d5e 100644
--- a/merge-tree.c
+++ b/merge-tree.c
@@ -1,51 +1,11 @@
 #include "cache.h"
-#include "diff.h"
+#include "tree-walk.h"
 
 static const char merge_tree_usage[] = "git-merge-tree <base-tree> <branch1> <branch2>";
 static int resolve_directories = 1;
 
 static void merge_trees(struct tree_desc t[3], const char *base);
 
-static void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1)
-{
-	unsigned long size = 0;
-	void *buf = NULL;
-
-	if (sha1) {
-		buf = read_object_with_reference(sha1, "tree", &size, NULL);
-		if (!buf)
-			die("unable to read tree %s", sha1_to_hex(sha1));
-	}
-	desc->size = size;
-	desc->buf = buf;
-	return buf;
-}
-
-struct name_entry {
-	const unsigned char *sha1;
-	const char *path;
-	unsigned int mode;
-	int pathlen;
-};
-
-static void entry_clear(struct name_entry *a)
-{
-	memset(a, 0, sizeof(*a));
-}
-
-static int entry_compare(struct name_entry *a, struct name_entry *b)
-{
-	return base_name_compare(
-			a->path, a->pathlen, a->mode,
-			b->path, b->pathlen, b->mode);
-}
-
-static void entry_extract(struct tree_desc *t, struct name_entry *a)
-{
-	a->sha1 = tree_entry_extract(t, &a->path, &a->mode);
-	a->pathlen = strlen(a->path);
-}
-
 /* An empty entry never compares same, not even to another empty entry */
 static int same_entry(struct name_entry *a, struct name_entry *b)
 {
@@ -144,7 +104,7 @@ static void unresolved(const char *base, struct name_entry n[3])
  *	 "0 mode sha1 filename"
  *    NOTE NOTE NOTE! FIXME! We really really need to walk the index
  *    in parallel with this too!
- * 
+ *
  *  - conflict:
  *	"1 mode sha1 filename"
  *	"2 mode sha1 filename"
@@ -154,76 +114,36 @@ static void unresolved(const char *base, struct name_entry n[3])
  * The successful merge rules are the same as for the three-way merge
  * in git-read-tree.
  */
-static void merge_trees(struct tree_desc t[3], const char *base)
+static void threeway_callback(int n, unsigned long mask, struct name_entry *entry, const char *base)
 {
-	for (;;) {
-		struct name_entry entry[3];
-		unsigned int mask = 0;
-		int i, last;
-
-		last = -1;
-		for (i = 0; i < 3; i++) {
-			if (!t[i].size)
-				continue;
-			entry_extract(t+i, entry+i);
-			if (last >= 0) {
-				int cmp = entry_compare(entry+i, entry+last);
-
-				/*
-				 * Is the new name bigger than the old one?
-				 * Ignore it
-				 */
-				if (cmp > 0)
-					continue;
-				/*
-				 * Is the new name smaller than the old one?
-				 * Ignore all old ones
-				 */
-				if (cmp < 0)
-					mask = 0;
-			}
-			mask |= 1u << i;
-			last = i;
-		}
-		if (!mask)
-			break;
-
-		/*
-		 * Update the tree entries we've walked, and clear
-		 * all the unused name-entries.
-		 */
-		for (i = 0; i < 3; i++) {
-			if (mask & (1u << i)) {
-				update_tree_entry(t+i);
-				continue;
-			}
-			entry_clear(entry + i);
+	/* Same in both? */
+	if (same_entry(entry+1, entry+2)) {
+		if (entry[0].sha1) {
+			resolve(base, NULL, entry+1);
+			return;
 		}
+	}
 
-		/* Same in both? */
-		if (same_entry(entry+1, entry+2)) {
-			if (entry[0].sha1) {
-				resolve(base, NULL, entry+1);
-				continue;
-			}
+	if (same_entry(entry+0, entry+1)) {
+		if (entry[2].sha1 && !S_ISDIR(entry[2].mode)) {
+			resolve(base, entry+1, entry+2);
+			return;
 		}
+	}
 
-		if (same_entry(entry+0, entry+1)) {
-			if (entry[2].sha1 && !S_ISDIR(entry[2].mode)) {
-				resolve(base, entry+1, entry+2);
-				continue;
-			}
+	if (same_entry(entry+0, entry+2)) {
+		if (entry[1].sha1 && !S_ISDIR(entry[1].mode)) {
+			resolve(base, NULL, entry+1);
+			return;
 		}
+	}
 
-		if (same_entry(entry+0, entry+2)) {
-			if (entry[1].sha1 && !S_ISDIR(entry[1].mode)) {
-				resolve(base, NULL, entry+1);
-				continue;
-			}
-		}
+	unresolved(base, entry);
+}
 
-		unresolved(base, entry);
-	}
+static void merge_trees(struct tree_desc t[3], const char *base)
+{
+	traverse_trees(3, t, base, threeway_callback);
 }
 
 static void *get_tree_descriptor(struct tree_desc *desc, const char *rev)