From 773ac24a16da6261e0f31b9354a9c890b1002422 Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@google.com>
Date: Tue, 2 Feb 2016 19:02:15 +0100
Subject: Expose git_odb_read_header as Odb.ReadHeader.

This function is much faster for discovering sizes for a given OID.
---
 odb.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'odb.go')

diff --git a/odb.go b/odb.go
index b15851f..d881f63 100644
--- a/odb.go
+++ b/odb.go
@@ -54,6 +54,21 @@ func (v *Odb) AddBackend(backend *OdbBackend, priority int) (err error) {
 	return nil
 }
 
+func (v *Odb) ReadHeader(oid *Oid) (uint64, ObjectType, error) {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+	
+	var sz C.size_t
+	var cotype C.git_otype 
+
+	ret := C.git_odb_read_header(&sz, &cotype, v.ptr, oid.toC())
+	if ret < 0 {
+		return 0, C.GIT_OBJ_BAD, MakeGitError(ret)
+	}
+
+	return uint64(sz), ObjectType(cotype), nil
+}
+	
 func (v *Odb) Exists(oid *Oid) bool {
 	ret := C.git_odb_exists(v.ptr, oid.toC())
 	return ret != 0
-- 
cgit v1.2.3