1 files changed, 51 insertions, 0 deletions
diff --git a/blob.c b/blob.c
new file mode 100644
index 0000000000..c1fdd861c3
--- /dev/null
+++ b/blob.c
@@ -0,0 +1,51 @@
+#include "cache.h"
+#include "blob.h"
+#include <stdlib.h>
+
+const char *blob_type = "blob";
+
+struct blob *lookup_blob(const unsigned char *sha1)
+{
+	struct object *obj = lookup_object(sha1);
+	if (!obj) {
+		struct blob *ret = xcalloc(1, sizeof(struct blob));
+		created_object(sha1, &ret->object);
+		ret->object.type = blob_type;
+		return ret;
+	}
+	if (!obj->type)
+		obj->type = blob_type;
+	if (obj->type != blob_type) {
+		error("Object %s is a %s, not a blob", 
+		      sha1_to_hex(sha1), 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)
+{
+        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, blob_type))
+                return error("Object %s not a blob",
+                             sha1_to_hex(item->object.sha1));
+	ret = parse_blob_buffer(item, buffer, size);
+	free(buffer);
+	return ret;
+}