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#include "commit.h"
#include "cache.h"
#include <string.h>
#include <limits.h>
const char *commit_type = "commit";
struct commit *lookup_commit(unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (!obj) {
struct commit *ret = malloc(sizeof(struct commit));
memset(ret, 0, sizeof(struct commit));
created_object(sha1, &ret->object);
return ret;
}
if (obj->parsed && 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;
}
static unsigned long parse_commit_date(const char *buf)
{
unsigned long date;
if (memcmp(buf, "author", 6))
return 0;
while (*buf++ != '\n')
/* nada */;
if (memcmp(buf, "committer", 9))
return 0;
while (*buf++ != '>')
/* nada */;
date = strtoul(buf, NULL, 10);
if (date == ULONG_MAX)
date = 0;
return date;
}
int parse_commit(struct commit *item)
{
char type[20];
void * buffer, *bufptr;
unsigned long size;
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))
return error("Object %s not a commit",
sha1_to_hex(item->object.sha1));
item->object.type = commit_type;
get_sha1_hex(bufptr + 5, parent);
item->tree = lookup_tree(parent);
add_ref(&item->object, &item->tree->object);
bufptr += 46; /* "tree " + "hex sha1" + "\n" */
while (!memcmp(bufptr, "parent ", 7) &&
!get_sha1_hex(bufptr + 7, parent)) {
struct commit_list *new_parent =
malloc(sizeof(struct commit_list));
new_parent->next = item->parents;
new_parent->item = lookup_commit(parent);
add_ref(&item->object, &new_parent->item->object);
item->parents = new_parent;
bufptr += 48;
}
item->date = parse_commit_date(bufptr);
free(buffer);
return 0;
}
void free_commit_list(struct commit_list *list)
{
while (list) {
struct commit_list *temp = list;
list = temp->next;
free(temp);
}
}
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