зеркало из https://github.com/microsoft/git.git
108 строки
2.6 KiB
C
108 строки
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 == TYPE_TAG)
|
|
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 = alloc_tag_node();
|
|
created_object(sha1, &ret->object);
|
|
ret->object.type = TYPE_TAG;
|
|
return ret;
|
|
}
|
|
if (!obj->type)
|
|
obj->type = TYPE_TAG;
|
|
if (obj->type != TYPE_TAG) {
|
|
error("Object %s is a %s, not a tree",
|
|
sha1_to_hex(sha1), typename(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((char *) data + 7, object))
|
|
return -1;
|
|
|
|
type_line = (char *) 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;
|
|
}
|