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[PATCH] Add function to parse an object of unspecified type (take 2) 

This adds a function that parses an object from the database when we have
to look up its actual type. It also checks the hash of the file, due to
its heritage as part of fsck-cache.

Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Daniel Barkalow 2005-04-28 07:46:33 -07:00 committed by Linus Torvalds
parent 2636f61437
commit e9eefa6761
2 changed files with 43 additions and 0 deletions
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40
object.c
View File

@ -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 @@ 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) {
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;
}

3
object.h
View File

@ -22,6 +22,9 @@ struct object *lookup_object(unsigned char *sha1);
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);