fsck-cache: fix SIGSEGV on bad tag object
[git/git.git] / blob.c
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1#include "blob.h"
2#include "cache.h"
3#include <stdlib.h>
4
5const char *blob_type = "blob";
6
7struct blob *lookup_blob(unsigned char *sha1)
8{
9 struct object *obj = lookup_object(sha1);
10 if (!obj) {
812666c8 11 struct blob *ret = xmalloc(sizeof(struct blob));
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12 memset(ret, 0, sizeof(struct blob));
13 created_object(sha1, &ret->object);
14 ret->object.type = blob_type;
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15 return ret;
16 }
a510bfaa 17 if (obj->type != blob_type) {
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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}
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24
25int parse_blob(struct blob *item)
26{
27 char type[20];
28 void *buffer;
29 unsigned long size;
30 if (item->object.parsed)
31 return 0;
32 item->object.parsed = 1;
33 buffer = read_sha1_file(item->object.sha1, type, &size);
34 if (!buffer)
35 return error("Could not read %s",
36 sha1_to_hex(item->object.sha1));
37 if (strcmp(type, blob_type))
38 return error("Object %s not a blob",
39 sha1_to_hex(item->object.sha1));
40 return 0;
41}