src/cmd/compress.cpp


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#include "apps.h"

#include <botan/compression.h>
#include <fstream>

namespace {

void do_compress(Transformation& comp, std::ifstream& in, std::ostream& out)
   {
   secure_vector<byte> buf;

   comp.start();

   while(in.good())
      {
      buf.resize(16*1024);
      in.read(reinterpret_cast<char*>(&buf[0]), buf.size());
      buf.resize(in.gcount());

      comp.update(buf);

      out.write(reinterpret_cast<const char*>(&buf[0]), buf.size());
      }

   buf.clear();
   comp.finish(buf);
   out.write(reinterpret_cast<const char*>(&buf[0]), buf.size());
   }

int compress(int argc, char* argv[])
   {
   const std::string in_file = argv[1];
   std::ifstream in(in_file.c_str());

   if(!in.good())
      {
      std::cout << "Couldn't read " << in_file << "\n";
      return 1;
      }

   const size_t level = 6;
   const std::string suffix = "gz";

   std::unique_ptr<Transformation> compress(make_compressor(suffix, level));

   const std::string out_file = in_file + "." + suffix;
   std::ofstream out(out_file.c_str());

   do_compress(*compress, in, out);

   return 0;
   }

int uncompress(int argc, char* argv[])
   {
   const std::string in_file = argv[1];
   std::ifstream in(in_file.c_str());

   if(!in.good())
      {
      std::cout << "Couldn't read " << argv[1] << "\n";
      return 1;
      }

   std::ofstream out("out");
   const std::string suffix = "gz";

   std::unique_ptr<Transformation> decompress(make_decompressor(suffix));

   do_compress(*decompress, in, out);

   return 0;
   }

REGISTER_APP(compress);
REGISTER_APP(uncompress);

}