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1 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_BZIP_EXTENT_WRITER_H__ | |
6 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_BZIP_EXTENT_WRITER_H__ | |
7 | |
8 #include <vector> | |
9 #include <bzlib.h> | |
10 #include "update_engine/extent_writer.h" | |
11 #include "update_engine/utils.h" | |
12 | |
13 // BzipExtentWriter is a concrete ExtentWriter subclass that bzip decompresses | |
Daniel Erat
2010/02/03 02:12:24
s/bzip decompresses/bzip-decompresses/
(just 'cau
adlr
2010/02/04 22:25:37
Done.
| |
14 // what it's given in Write. It passes the decompressed data to an underlying | |
15 // ExtentWriter. | |
16 | |
17 namespace chromeos_update_engine { | |
18 | |
19 class BzipExtentWriter : public ExtentWriter { | |
20 public: | |
21 BzipExtentWriter(ExtentWriter* next) : next_(next) { | |
22 memset(&stream_, 0, sizeof(stream_)); | |
23 } | |
24 ~BzipExtentWriter() {} | |
25 | |
26 bool Init(int fd, const std::vector<Extent>& extents, uint32 block_size); | |
27 bool Write(const void* bytes, size_t count); | |
28 bool EndImpl(); | |
29 | |
30 private: | |
31 ExtentWriter* const next_; // The underlying ExtentWriter. | |
32 bz_stream stream_; // the libbz2 stream | |
33 std::vector<char> input_buffer_; | |
34 }; | |
35 | |
36 } // namespace chromeos_update_engine | |
37 | |
38 #endif // CHROMEOS_PLATFORM_UPDATE_ENGINE_BZIP_EXTENT_WRITER_H__ | |
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