8f1d2e6f49
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>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
#include "cache.h"
|
|
#include "tag.h"
|
|
|
|
const char *tag_type = "tag";
|
|
|
|
struct object *deref_tag(struct object *o, const char *warn, int warnlen)
|
|
{
|
|
while (o && o->type == tag_type)
|
|
o = parse_object(((struct tag *)o)->tagged->sha1);
|
|
if (!o && warn) {
|
|
if (!warnlen)
|
|
warnlen = strlen(warn);
|
|
error("missing object referenced by '%.*s'", warnlen, warn);
|
|
}
|
|
return o;
|
|
}
|
|
|
|
struct tag *lookup_tag(const unsigned char *sha1)
|
|
{
|
|
struct object *obj = lookup_object(sha1);
|
|
if (!obj) {
|
|
struct tag *ret = xmalloc(sizeof(struct tag));
|
|
memset(ret, 0, sizeof(struct tag));
|
|
created_object(sha1, &ret->object);
|
|
ret->object.type = tag_type;
|
|
return ret;
|
|
}
|
|
if (!obj->type)
|
|
obj->type = tag_type;
|
|
if (obj->type != tag_type) {
|
|
error("Object %s is a %s, not a tree",
|
|
sha1_to_hex(sha1), obj->type);
|
|
return NULL;
|
|
}
|
|
return (struct tag *) obj;
|
|
}
|
|
|
|
int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
|
|
{
|
|
int typelen, taglen;
|
|
unsigned char object[20];
|
|
const char *type_line, *tag_line, *sig_line;
|
|
char type[20];
|
|
|
|
if (item->object.parsed)
|
|
return 0;
|
|
item->object.parsed = 1;
|
|
|
|
if (size < 64)
|
|
return -1;
|
|
if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object))
|
|
return -1;
|
|
|
|
type_line = data + 48;
|
|
if (memcmp("\ntype ", type_line-1, 6))
|
|
return -1;
|
|
|
|
tag_line = strchr(type_line, '\n');
|
|
if (!tag_line || memcmp("tag ", ++tag_line, 4))
|
|
return -1;
|
|
|
|
sig_line = strchr(tag_line, '\n');
|
|
if (!sig_line)
|
|
return -1;
|
|
sig_line++;
|
|
|
|
typelen = tag_line - type_line - strlen("type \n");
|
|
if (typelen >= 20)
|
|
return -1;
|
|
memcpy(type, type_line + 5, typelen);
|
|
type[typelen] = '\0';
|
|
taglen = sig_line - tag_line - strlen("tag \n");
|
|
item->tag = xmalloc(taglen + 1);
|
|
memcpy(item->tag, tag_line + 4, taglen);
|
|
item->tag[taglen] = '\0';
|
|
|
|
item->tagged = lookup_object_type(object, type);
|
|
if (item->tagged && track_object_refs) {
|
|
struct object_refs *refs = alloc_object_refs(1);
|
|
refs->ref[0] = item->tagged;
|
|
set_object_refs(&item->object, refs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int parse_tag(struct tag *item)
|
|
{
|
|
char type[20];
|
|
void *data;
|
|
unsigned long size;
|
|
int ret;
|
|
|
|
if (item->object.parsed)
|
|
return 0;
|
|
data = read_sha1_file(item->object.sha1, type, &size);
|
|
if (!data)
|
|
return error("Could not read %s",
|
|
sha1_to_hex(item->object.sha1));
|
|
if (strcmp(type, tag_type)) {
|
|
free(data);
|
|
return error("Object %s not a tag",
|
|
sha1_to_hex(item->object.sha1));
|
|
}
|
|
ret = parse_tag_buffer(item, data, size);
|
|
free(data);
|
|
return ret;
|
|
}
|