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-rw-r--r--blob.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/blob.c b/blob.c
new file mode 100644
index 000000000..bd7d078e1
--- /dev/null
+++ b/blob.c
@@ -0,0 +1,46 @@
+#include "cache.h"
+#include "blob.h"
+
+const char *blob_type = "blob";
+
+struct blob *lookup_blob(const unsigned char *sha1)
+{
+ struct object *obj = lookup_object(sha1);
+ if (!obj)
+ return create_object(sha1, OBJ_BLOB, alloc_blob_node());
+ if (!obj->type)
+ obj->type = OBJ_BLOB;
+ if (obj->type != OBJ_BLOB) {
+ error("Object %s is a %s, not a blob",
+ sha1_to_hex(sha1), typename(obj->type));
+ return NULL;
+ }
+ return (struct blob *) obj;
+}
+
+int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)
+{
+ item->object.parsed = 1;
+ return 0;
+}
+
+int parse_blob(struct blob *item)
+{
+ enum object_type type;
+ 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 (type != OBJ_BLOB)
+ return error("Object %s not a blob",
+ sha1_to_hex(item->object.sha1));
+ ret = parse_blob_buffer(item, buffer, size);
+ free(buffer);
+ return ret;
+}