[3'/5] Add function to parse an object of unspecified type (take 2)

From

Daniel Barkalow <barkalow@iabervon.org>

Date

Apr 28, 2005, 06:01 UTC

Message-ID

<Pine.LNX.4.21.0504280158230.30848-100000@iabervon.org>

In-Reply-To

<Pine.LNX.4.21.0504280106540.30848-100000@iabervon.org>

Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org>

Index: object.c
===================================================================
--- bcb43fecd82fa6f851e266b7e3873973068d51f3/object.c  (mode:100644 sha1:91bbc6e5e2eadfb0a66b14d992eac260d07267f8)
+++ 52505514b78c9bd77fcd701663c1967919d1cec3/object.c  (mode:100644 sha1:ca4af8fa2dc0672b92310a3ebdd4d14bf070dd69)
@@ -1,5 +1,9 @@
 #include "object.h"
+#include "blob.h"
+#include "tree.h"
+#include "commit.h"
 #include "cache.h"
+#include "tag.h"
 #include <stdlib.h>
 #include <string.h>
 
@@ -94,3 +98,39 @@
 		p = p->next;
 	}
 }
+
+struct object *parse_object(unsigned char *sha1)
+{
+	unsigned long mapsize;
+	void *map = map_sha1_file(sha1, &mapsize);
+	if (map) {
+		char type[100];
+		unsigned long size;
+		void *buffer = unpack_sha1_file(map, mapsize, type, &size);
+		if (!buffer)
+			return NULL;
+		if (check_sha1_signature(sha1, buffer, size, type) < 0)
+			printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
+		munmap(map, mapsize);
+		if (!strcmp(type, "blob")) {
+			struct blob *ret = lookup_blob(sha1);
+			parse_blob(ret);
+			return &ret->object;
+		} else if (!strcmp(type, "tree")) {
+			struct tree *ret = lookup_tree(sha1);
+			parse_tree(ret);
+			return &ret->object;
+		} else if (!strcmp(type, "commit")) {
+			struct commit *ret = lookup_commit(sha1);
+			parse_commit(ret);
+			return &ret->object;
+		} else if (!strcmp(type, "tag")) {
+			struct tag *ret = lookup_tag(sha1);
+			parse_tag(ret);
+			return &ret->object;
+		} else {
+			return NULL;
+		}
+	}
+	return NULL;
+}
Index: object.h
===================================================================
--- bcb43fecd82fa6f851e266b7e3873973068d51f3/object.h  (mode:100644 sha1:bc607fd55f6ce4e56ce87766369b5d4d55ec79af)
+++ 52505514b78c9bd77fcd701663c1967919d1cec3/object.h  (mode:100644 sha1:d53a35a4d7321b5ec970103208ac576f9f722dff)
@@ -22,6 +22,9 @@
 
 void created_object(unsigned char *sha1, struct object *obj);
 
+/** Returns the object, having parsed it to find out what it is. **/
+struct object *parse_object(unsigned char *sha1);
+
 void add_ref(struct object *refer, struct object *target);
 
 void mark_reachable(struct object *obj, unsigned int mask);