AU: Bzip2 utility functions that mirror Gzip utility functions.

src/platform/update_engine/bzip.h

Index: src/platform/update_engine/bzip.h
diff --git a/src/platform/update_engine/bzip.h b/src/platform/update_engine/bzip.h
new file mode 100644
index 0000000000000000000000000000000000000000..72c9924d53ce5025ad64f298d60c7d1e81abdc07
--- /dev/null
+++ b/src/platform/update_engine/bzip.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string>
+#include <vector>
+
+namespace chromeos_update_engine {
+
+// BzipData compresses or decompresses the input to the output.
+// Returns true on success.
+// Use one of BzipBuffToBuff*ompress as the template parameter to BzipData().
+int BzipBuffToBuffDecompress(char* out,

[Daniel Erat, 2010/03/11 23:25:04]

Are these supposed to be outside-facing?  If not, move them to the .cc file and
put them into an anon namespace (maybe the template needs to stay in the header,
though).

+                             size_t* out_length,
+                             const char* in,
+                             size_t in_length);
+int BzipBuffToBuffCompress(char* out,
+                           size_t* out_length,
+                           const char* in,
+                           size_t in_length);
+template<int F(char* out,
+               size_t* out_length,
+               const char* in,
+               size_t in_length)>
+bool BzipData(const char* const in,
+              const size_t in_size,
+              std::vector<char>* const out);
+
+// Helper functions:
+bool BzipDecompress(const std::vector<char>& in, std::vector<char>* out);
+bool BzipCompress(const std::vector<char>& in, std::vector<char>* out);
+bool BzipCompressString(const std::string& str, std::vector<char>* out);
+bool BzipDecompressString(const std::string& str, std::vector<char>* out);
+
+}  // namespace chromeos_update_engine