git/blob.c
Junio C Hamano 8f1d2e6f49 [PATCH] Compilation: zero-length array declaration.
ISO C99 (and GCC 3.x or later) lets you write a flexible array
at the end of a structure, like this:

	struct frotz {
		int xyzzy;
		char nitfol[]; /* more */
	};

GCC 2.95 and 2.96 let you to do this with "char nitfol[0]";
unfortunately this is not allowed by ISO C90.

This declares such construct like this:

	struct frotz {
		int xyzzy;
		char nitfol[FLEX_ARRAY]; /* more */
	};

and git-compat-util.h defines FLEX_ARRAY to 0 for gcc 2.95 and
empty for others.

If you are using a C90 C compiler, you should be able
to override this with CFLAGS=-DFLEX_ARRAY=1 from the
command line of "make".

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-01-07 10:51:06 -08:00

53 lines
1.3 KiB
C

#include "cache.h"
#include "blob.h"
#include <stdlib.h>
const char *blob_type = "blob";
struct blob *lookup_blob(const unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (!obj) {
struct blob *ret = xmalloc(sizeof(struct blob));
memset(ret, 0, sizeof(struct blob));
created_object(sha1, &ret->object);
ret->object.type = blob_type;
return ret;
}
if (!obj->type)
obj->type = blob_type;
if (obj->type != blob_type) {
error("Object %s is a %s, not a blob",
sha1_to_hex(sha1), obj->type);
return NULL;
}
return (struct blob *) obj;
}
int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)
{
item->object.parsed = 1;
return 0;
}
int parse_blob(struct blob *item)
{
char type[20];
void *buffer;
unsigned long size;
int ret;
if (item->object.parsed)
return 0;
buffer = read_sha1_file(item->object.sha1, type, &size);
if (!buffer)
return error("Could not read %s",
sha1_to_hex(item->object.sha1));
if (strcmp(type, blob_type))
return error("Object %s not a blob",
sha1_to_hex(item->object.sha1));
ret = parse_blob_buffer(item, buffer, size);
free(buffer);
return ret;
}