+#include "tag.h"
#include "commit.h"
#include "cache.h"
-#include <string.h>
-#include <limits.h>
const char *commit_type = "commit";
+static struct commit *check_commit(struct object *obj, unsigned char *sha1)
+{
+ if (obj->type != commit_type) {
+ error("Object %s is a %s, not a commit",
+ sha1_to_hex(sha1), obj->type);
+ return NULL;
+ }
+ return (struct commit *) obj;
+}
+
+struct commit *lookup_commit_reference(unsigned char *sha1)
+{
+ struct object *obj = parse_object(sha1);
+
+ if (!obj)
+ return NULL;
+ if (obj->type == tag_type)
+ obj = ((struct tag *)obj)->tagged;
+ return check_commit(obj, sha1);
+}
+
struct commit *lookup_commit(unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
ret->object.type = commit_type;
return ret;
}
- if (obj->type != commit_type) {
- error("Object %s is a %s, not a commit",
- sha1_to_hex(sha1), obj->type);
- return NULL;
- }
- return (struct commit *) obj;
+ if (!obj->type)
+ obj->type = commit_type;
+ return check_commit(obj, sha1);
}
static unsigned long parse_commit_date(const char *buf)
return date;
}
-int parse_commit(struct commit *item)
+int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
{
- char type[20];
- void * buffer, *bufptr;
- unsigned long size;
+ void *bufptr = buffer;
unsigned char parent[20];
+
if (item->object.parsed)
return 0;
item->object.parsed = 1;
- buffer = bufptr = 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, commit_type)) {
- free(buffer);
- return error("Object %s not a commit",
- sha1_to_hex(item->object.sha1));
- }
get_sha1_hex(bufptr + 5, parent);
item->tree = lookup_tree(parent);
if (item->tree)
bufptr += 48;
}
item->date = parse_commit_date(bufptr);
- free(buffer);
return 0;
}
+int parse_commit(struct commit *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, commit_type)) {
+ free(buffer);
+ return error("Object %s not a commit",
+ sha1_to_hex(item->object.sha1));
+ }
+ ret = parse_commit_buffer(item, buffer, size);
+ if (!ret) {
+ item->buffer = buffer;
+ return 0;
+ }
+ free(buffer);
+ return ret;
+}
+
void commit_list_insert(struct commit *item, struct commit_list **list_p)
{
struct commit_list *new_list = xmalloc(sizeof(struct commit_list));