AU: Class to perform delta updates.

src/platform/update_engine/extent_mapper.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_MAPPER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_MAPPER_H__
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
 #include "update_engine/update_metadata.pb.h"
 
 namespace chromeos_update_engine {
 
 namespace extent_mapper {
 
 // Uses the FIBMAP ioctl to get all blocks used by a file and return them
 // as extents. Blocks are relative to the start of the filesystem. If
 // there is a sparse "hole" in the file, the blocks for that will be
 // represented by an extent whose start block is kSpareseHole.
 // The resulting extents are stored in 'out'. Keep in mind that while
 // the blocksize of a filesystem is often 4096 bytes, that is not always
 // the case, so one should consult GetFilesystemBlockSize(), too.
 // Returns true on success.
 bool ExtentsForFileFibmap(const std::string& path, std::vector<Extent>* out);
 
 // Puts the blocksize of the filesystem, as used by the FIBMAP ioctl, into
 // out_blocksize by using the FIGETBSZ ioctl. Returns true on success.
-bool GetFilesystemBlockSize(const std::string& path, uint32* out_blocksize);
+bool GetFilesystemBlockSize(const std::string& path, uint32_t* out_blocksize);
 
 }  // namespace extent_mapper
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_MAPPER_H__