revision.c: explain what tree_difference does

diff --git a/tree.c b/tree.c
index a6032e35ecb2543b6efcae252e5815b804cb6f0a..46923ee61bcce99e677abcc37e233359d39cc9fc 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -4,7 +4,6 @@
 #include "commit.h"
 #include "tag.h"
 #include "tree-walk.h"
-#include <stdlib.h>
 
 const char *tree_type = "tree";
 
@@ -25,7 +24,7 @@ static int read_one_entry(const unsigned char *sha1, const char *base, int basel
        ce->ce_flags = create_ce_flags(baselen + len, stage);
        memcpy(ce->name, base, baselen);
        memcpy(ce->name + baselen, pathname, len+1);
-       memcpy(ce->sha1, sha1, 20);
+       hashcpy(ce->sha1, sha1);
        return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
 }
 
@@ -144,7 +143,7 @@ struct tree *lookup_tree(const unsigned char *sha1)
        return (struct tree *) obj;
 }
 
-static int track_tree_refs(struct tree *item)
+static void track_tree_refs(struct tree *item)
 {
        int n_refs = 0, i;
        struct object_refs *refs;
@@ -174,7 +173,6 @@ static int track_tree_refs(struct tree *item)
                refs->ref[i++] = obj;
        }
        set_object_refs(&item->object, refs);
-       return 0;
 }
 
 int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
@@ -192,17 +190,17 @@ int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
 
 int parse_tree(struct tree *item)
 {
-        char type[20];
+        enum object_type type;
         void *buffer;
         unsigned long size;
 
        if (item->object.parsed)
                return 0;
-       buffer = read_sha1_file(item->object.sha1, type, &size);
+       buffer = read_sha1_file(item->object.sha1, &type, &size);
        if (!buffer)
                return error("Could not read %s",
                             sha1_to_hex(item->object.sha1));
-       if (strcmp(type, tree_type)) {
+       if (type != OBJ_TREE) {
                free(buffer);
                return error("Object %s not a tree",
                             sha1_to_hex(item->object.sha1));