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/*
* Bzip2 Compression/Decompression
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <string>
#include <cstring>
#include <vector>
#include <fstream>
#include <iostream>
#include <botan/botan.h>
/*
* If Bzip2 isn't included, we know nothing works at compile time, but
* we wait to fail at runtime. Otherwise I would get 2-3 mails a month
* about how this was failing to compile (even with an informative
* #error message explaining the situation) because bzip2 wasn't
* included in the build.
*/
#if defined(BOTAN_HAS_COMPRESSOR_BZIP2)
#include <botan/bzip2.h>
#endif
const std::string SUFFIX = ".bz2";
int main(int argc, char* argv[])
{
if(argc < 2)
{
std::cout << "Usage: " << argv[0]
<< " [-s] [-d] [-1...9] <filenames>" << std::endl;
return 1;
}
Botan::LibraryInitializer init;
std::vector<std::string> files;
bool decompress = false, small = false;
int level = 9;
for(int j = 1; argv[j] != 0; j++)
{
if(std::strcmp(argv[j], "-d") == 0) { decompress = true; continue; }
if(std::strcmp(argv[j], "-s") == 0) { small = true; continue; }
if(std::strcmp(argv[j], "-1") == 0) { level = 1; continue; }
if(std::strcmp(argv[j], "-2") == 0) { level = 2; continue; }
if(std::strcmp(argv[j], "-3") == 0) { level = 3; continue; }
if(std::strcmp(argv[j], "-4") == 0) { level = 4; continue; }
if(std::strcmp(argv[j], "-5") == 0) { level = 5; continue; }
if(std::strcmp(argv[j], "-6") == 0) { level = 6; continue; }
if(std::strcmp(argv[j], "-7") == 0) { level = 7; continue; }
if(std::strcmp(argv[j], "-8") == 0) { level = 8; continue; }
if(std::strcmp(argv[j], "-9") == 0) { level = 9; continue; }
files.push_back(argv[j]);
}
try {
Botan::Filter* bzip = 0;
#ifdef BOTAN_HAS_COMPRESSOR_BZIP2
if(decompress)
bzip = new Botan::Bzip_Decompression(small);
else
bzip = new Botan::Bzip_Compression(level);
#endif
if(!bzip)
{
std::cout << "Sorry, support for bzip2 not compiled into Botan\n";
return 1;
}
Botan::Pipe pipe(bzip);
for(unsigned int j = 0; j != files.size(); j++)
{
std::string infile = files[j], outfile = files[j];
if(!decompress)
outfile = outfile += SUFFIX;
else
outfile = outfile.replace(outfile.find(SUFFIX),
SUFFIX.length(), "");
std::ifstream in(infile.c_str(), std::ios::binary);
std::ofstream out(outfile.c_str(), std::ios::binary);
if(!in)
{
std::cout << "ERROR: could not read " << infile << std::endl;
continue;
}
if(!out)
{
std::cout << "ERROR: could not write " << outfile << std::endl;
continue;
}
pipe.start_msg();
in >> pipe;
pipe.end_msg();
pipe.set_default_msg(j);
out << pipe;
in.close();
out.close();
}
}
catch(std::exception& e)
{
std::cout << "Exception caught: " << e.what() << std::endl;
return 1;
}
return 0;
}
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