X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=object.c;h=deb683076d7e1a91e913398ff905085230014a4f;hb=057c7d30183672d6ef96a9f3e87860058e1c08f8;hp=91bbc6e5e2eadfb0a66b14d992eac260d07267f8;hpb=812666c8e66a21e668c0789d0422aa5a7db54961;p=git.git

diff --git a/object.c b/object.c
index 91bbc6e5..deb68307 100644
--- a/object.c
+++ b/object.c
@@ -1,5 +1,10 @@
 #include "object.h"
+#include "blob.h"
+#include "tree.h"
+#include "commit.h"
 #include "cache.h"
+#include "tag.h"
+#include "delta.h"
 #include <stdlib.h>
 #include <string.h>
 
@@ -94,3 +99,48 @@ void mark_reachable(struct object *obj, unsigned int mask)
 		p = p->next;
 	}
 }
+
+struct object *parse_object(unsigned char *sha1)
+{
+	unsigned long mapsize;
+	void *map = map_sha1_file(sha1, &mapsize);
+	if (map) {
+		int is_delta;
+		struct object *obj;
+		char type[100];
+		unsigned long size;
+		void *buffer = unpack_sha1_file(map, mapsize, type, &size);
+		munmap(map, mapsize);
+		if (!buffer)
+			return NULL;
+		is_delta = !strcmp(type, "delta");
+		if (!is_delta && check_sha1_signature(sha1, buffer, size, type) < 0)
+			printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
+		if (is_delta) {
+			struct delta *delta = lookup_delta(sha1);
+			parse_delta_buffer(delta, buffer, size);
+			obj = (struct object *) delta;
+		} else if (!strcmp(type, "blob")) {
+			struct blob *blob = lookup_blob(sha1);
+			parse_blob_buffer(blob, buffer, size);
+			obj = &blob->object;
+		} else if (!strcmp(type, "tree")) {
+			struct tree *tree = lookup_tree(sha1);
+			parse_tree_buffer(tree, buffer, size);
+			obj = &tree->object;
+		} else if (!strcmp(type, "commit")) {
+			struct commit *commit = lookup_commit(sha1);
+			parse_commit_buffer(commit, buffer, size);
+			obj = &commit->object;
+		} else if (!strcmp(type, "tag")) {
+			struct tag *tag = lookup_tag(sha1);
+			parse_tag_buffer(tag, buffer, size);
+			obj = &tag->object;
+		} else {
+			obj = NULL;
+		}
+		free(buffer);
+		return obj;
+	}
+	return NULL;
+}