blob.c

   1 #include "cache.h"
   2 #include "blob.h"
   3
   4 const char *blob_type = "blob";
   5
   6 struct blob *lookup_blob(const unsigned char *sha1)
   7 {
   8         struct object *obj = lookup_object(sha1);
   9         if (!obj)
  10                 return create_object(sha1, OBJ_BLOB, alloc_blob_node());
  11         if (!obj->type)
  12                 obj->type = OBJ_BLOB;
  13         if (obj->type != OBJ_BLOB) {
  14                 error("Object %s is a %s, not a blob",
  15                       sha1_to_hex(sha1), typename(obj->type));
  16                 return NULL;
  17         }
  18         return (struct blob *) obj;
  19 }
  20
  21 int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)
  22 {
  23         item->object.parsed = 1;
  24         return 0;
  25 }
  26
  27 int parse_blob(struct blob *item)
  28 {
  29         enum object_type type;
  30         void *buffer;
  31         unsigned long size;
  32         int ret;
  33
  34         if (item->object.parsed)
  35                 return 0;
  36         buffer = read_sha1_file(item->object.sha1, &type, &size);
  37         if (!buffer)
  38                 return error("Could not read %s",
  39                              sha1_to_hex(item->object.sha1));
  40         if (type != OBJ_BLOB)
  41                 return error("Object %s not a blob",
  42                              sha1_to_hex(item->object.sha1));
  43         ret = parse_blob_buffer(item, buffer, size);
  44         free(buffer);
  45         return ret;
  46 }