X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=object.c;h=c410e97c8f378bd6c680efa48c82c3d3f7907103;hb=a92bebe6978edaea2885a627e7bef6f7f8b208c2;hp=cfa2337641aabd692c659eabef347be11af9f517;hpb=b51ad4314078298194d23d46e2b4473ffd32a88a;p=git.git

diff --git a/object.c b/object.c
index cfa23376..c410e97c 100644
--- a/object.c
+++ b/object.c
@@ -1,13 +1,15 @@
 #include "object.h"
+#include "blob.h"
+#include "tree.h"
+#include "commit.h"
 #include "cache.h"
-#include <stdlib.h>
-#include <string.h>
+#include "tag.h"
 
 struct object **objs;
 int nr_objs;
 static int obj_allocs;
 
-static int find_object(unsigned char *sha1)
+static int find_object(const unsigned char *sha1)
 {
 	int first = 0, last = nr_objs;
 
@@ -28,7 +30,7 @@ static int find_object(unsigned char *sha1)
         return -first-1;
 }
 
-struct object *lookup_object(unsigned char *sha1)
+struct object *lookup_object(const unsigned char *sha1)
 {
 	int pos = find_object(sha1);
 	if (pos >= 0)
@@ -36,7 +38,7 @@ struct object *lookup_object(unsigned char *sha1)
 	return NULL;
 }
 
-void created_object(unsigned char *sha1, struct object *obj)
+void created_object(const unsigned char *sha1, struct object *obj)
 {
 	int pos = find_object(sha1);
 
@@ -52,7 +54,7 @@ void created_object(unsigned char *sha1, struct object *obj)
 
 	if (obj_allocs == nr_objs) {
 		obj_allocs = alloc_nr(obj_allocs);
-		objs = realloc(objs, obj_allocs * sizeof(struct object *));
+		objs = xrealloc(objs, obj_allocs * sizeof(struct object *));
 	}
 
 	/* Insert it into the right place */
@@ -75,7 +77,7 @@ void add_ref(struct object *refer, struct object *target)
 	}
 
 	target->used = 1;
-	p = malloc(sizeof(*p));
+	p = xmalloc(sizeof(*p));
 	p->item = target;
 	p->next = NULL;
 	*pp = p;
@@ -94,3 +96,57 @@ void mark_reachable(struct object *obj, unsigned int mask)
 		p = p->next;
 	}
 }
+
+struct object *lookup_object_type(const unsigned char *sha1, const char *type)
+{
+	if (!strcmp(type, blob_type)) {
+		return &lookup_blob(sha1)->object;
+	} else if (!strcmp(type, tree_type)) {
+		return &lookup_tree(sha1)->object;
+	} else if (!strcmp(type, commit_type)) {
+		return &lookup_commit(sha1)->object;
+	} else if (!strcmp(type, tag_type)) {
+		return &lookup_tag(sha1)->object;
+	} else {
+		error("Unknown type %s", type);
+		return NULL;
+	}
+}
+
+struct object *parse_object(const unsigned char *sha1)
+{
+	unsigned long size;
+	char type[20];
+	void *buffer = read_sha1_file(sha1, type, &size);
+	if (buffer) {
+		struct object *obj;
+		if (check_sha1_signature(sha1, buffer, size, type) < 0)
+			printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
+		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);
+			if (!commit->buffer) {
+				commit->buffer = buffer;
+				buffer = NULL;
+			}
+			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;
+}