Transition to pulling open-vcdiff from repository, instead of using snapshot...

sdch/open_vcdiff/depot/opensource/open-vcdiff/src/checksum.h

-// Copyright 2008 Google Inc.
-// Author: Lincoln Smith
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// A wrapper for the adler32() function from zlib.  This can be replaced
-// with another checksum implementation if desired.
-
-#ifndef OPEN_VCDIFF_CHECKSUM_H_
-#define OPEN_VCDIFF_CHECKSUM_H_
-
-#include <config.h>
-#include "zlib.h"
-
-namespace open_vcdiff {
-
-typedef uLong VCDChecksum;
-
-const VCDChecksum kNoPartialChecksum = 0;
-
-inline VCDChecksum ComputeAdler32(const char* buffer,
-                                  size_t size) {
-  return adler32(kNoPartialChecksum,
-                 reinterpret_cast<const Bytef*>(buffer),
-                 static_cast<uInt>(size));
-}
-
-inline VCDChecksum UpdateAdler32(VCDChecksum partial_checksum,
-                                 const char* buffer,
-                                 size_t size) {
-  return adler32(partial_checksum,
-                 reinterpret_cast<const Bytef*>(buffer),
-                 static_cast<uInt>(size));
-}
-
-}  // namespace open_vcdiff
-
-#endif  // OPEN_VCDIFF_CHECKSUM_H_