don't expose 3 different diff foreach methods. use structures instead of pointers to structures for diff detail. add patch error code handling. trim excess data from diff structures.

1 files changed, 4 insertions, 1 deletions

diff --git a/patch.go b/patch.go
index d927109..0665501 100644
--- a/patch.go
+++ b/patch.go
@@ -40,6 +40,9 @@ func (patch *Patch) String() (string, error) {
 		return "", ErrInvalid
 	}
 	var buf C.git_buf
-	C.git_patch_to_buf(&buf, patch.ptr)
+	ecode := C.git_patch_to_buf(&buf, patch.ptr)
+	if ecode < 0 {
+		return "", MakeGitError(ecode)
+	}
 	return C.GoString(buf.ptr), nil
 }