Andrew's git - gitweb.git/blob

   1#include "commit.h"
   2#include "cache.h"
   3#include <string.h>
   4
   5const char *commit_type = "commit";
   6
   7struct commit *lookup_commit(unsigned char *sha1)
   8{
   9        struct object *obj = lookup_object(sha1);
  10        if (!obj) {
  11                struct commit *ret = malloc(sizeof(struct commit));
  12                memset(ret, 0, sizeof(struct commit));
  13                created_object(sha1, &ret->object);
  14                return ret;
  15        }
  16        if (obj->parsed && obj->type != commit_type) {
  17                error("Object %s is a %s, not a commit", 
  18                      sha1_to_hex(sha1), obj->type);
  19                return NULL;
  20        }
  21        return (struct commit *) obj;
  22}
  23
  24static unsigned long parse_commit_date(const char *buf)
  25{
  26        unsigned long date;
  27
  28        if (memcmp(buf, "author", 6))
  29                return 0;
  30        while (*buf++ != '\n')
  31                /* nada */;
  32        if (memcmp(buf, "committer", 9))
  33                return 0;
  34        while (*buf++ != '>')
  35                /* nada */;
  36        date = strtoul(buf, NULL, 10);
  37        if (date == ULONG_MAX)
  38                date = 0;
  39        return date;
  40}
  41
  42int parse_commit(struct commit *item)
  43{
  44        char type[20];
  45        void * buffer, *bufptr;
  46        unsigned long size;
  47        unsigned char parent[20];
  48        if (item->object.parsed)
  49                return 0;
  50        item->object.parsed = 1;
  51        buffer = bufptr = read_sha1_file(item->object.sha1, type, &size);
  52        if (!buffer)
  53                return error("Could not read %s",
  54                             sha1_to_hex(item->object.sha1));
  55        if (strcmp(type, commit_type))
  56                return error("Object %s not a commit",
  57                             sha1_to_hex(item->object.sha1));
  58        item->object.type = commit_type;
  59        get_sha1_hex(bufptr + 5, parent);
  60        item->tree = lookup_tree(parent);
  61        add_ref(&item->object, &item->tree->object);
  62        bufptr += 46; /* "tree " + "hex sha1" + "\n" */
  63        while (!memcmp(bufptr, "parent ", 7) &&
  64               !get_sha1_hex(bufptr + 7, parent)) {
  65                struct commit_list *new_parent = 
  66                        malloc(sizeof(struct commit_list));
  67                new_parent->next = item->parents;
  68                new_parent->item = lookup_commit(parent);
  69                add_ref(&item->object, &new_parent->item->object);
  70                item->parents = new_parent;
  71                bufptr += 48;
  72        }
  73        item->date = parse_commit_date(bufptr);
  74        free(buffer);
  75        return 0;
  76}
  77
  78void free_commit_list(struct commit_list *list)
  79{
  80        while (list) {
  81                struct commit_list *temp = list;
  82                list = temp->next;
  83                free(temp);
  84        }
  85}