[PATCH] don't load and decompress objects twice with parse_object()
[git/git.git] / blob.c
1 #include "blob.h"
2 #include "cache.h"
3 #include <stdlib.h>
4
5 const char *blob_type = "blob";
6
7 struct blob *lookup_blob(unsigned char *sha1)
8 {
9 struct object *obj = lookup_object(sha1);
10 if (!obj) {
11 struct blob *ret = xmalloc(sizeof(struct blob));
12 memset(ret, 0, sizeof(struct blob));
13 created_object(sha1, &ret->object);
14 ret->object.type = blob_type;
15 return ret;
16 }
17 if (obj->type != blob_type) {
18 error("Object %s is a %s, not a blob",
19 sha1_to_hex(sha1), obj->type);
20 return NULL;
21 }
22 return (struct blob *) obj;
23 }
24
25 int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)
26 {
27 item->object.parsed = 1;
28 return 0;
29 }
30
31 int parse_blob(struct blob *item)
32 {
33 char type[20];
34 void *buffer;
35 unsigned long size;
36 int ret;
37
38 if (item->object.parsed)
39 return 0;
40 buffer = read_sha1_file(item->object.sha1, type, &size);
41 if (!buffer)
42 return error("Could not read %s",
43 sha1_to_hex(item->object.sha1));
44 if (strcmp(type, blob_type))
45 return error("Object %s not a blob",
46 sha1_to_hex(item->object.sha1));
47 ret = parse_blob_buffer(item, buffer, size);
48 free(buffer);
49 return ret;
50 }