| # -*- coding: utf-8 -*- |
| # Copyright 2010-2015, Google Inc. |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| """Simple zlib utility.""" |
| |
| import sys |
| import zlib |
| |
| |
| def _Read(filename): |
| """Reads a file in binary mode.""" |
| with open(filename, 'rb') as f: |
| return f.read() |
| |
| |
| def _Write(buf, filename): |
| """Writes a buffer to a file in binary mode.""" |
| with open(filename, 'wb') as f: |
| f.write(buf) |
| |
| |
| def Compress(input_filename, output_filename): |
| """Compresses a single file by zlib's compression algorithm.""" |
| _Write(zlib.compress(_Read(input_filename)), output_filename) |
| |
| |
| def Decompress(input_filename, output_filename): |
| """Decompresses a single deflated file.""" |
| _Write(zlib.decompress(_Read(input_filename)), output_filename) |
| |
| |
| def main(): |
| if len(sys.argv) != 4: |
| print >>sys.stderr, 'Invalid arguments' |
| return |
| if sys.argv[1] == 'compress': |
| Compress(sys.argv[2], sys.argv[3]) |
| return |
| if sys.argv[1] == 'decompress': |
| Decompress(sys.argv[2], sys.argv[3]) |
| return |
| print >>sys.stderr, 'Unknown command:', sys.argv[1] |
| |
| |
| if __name__ == '__main__': |
| main() |