1 files changed, 126 insertions, 0 deletions
diff --git a/src/cli/compress.cpp b/src/cli/compress.cpp
new file mode 100644
index 000000000..93bc76eb4
--- /dev/null
+++ b/src/cli/compress.cpp
@@ -0,0 +1,126 @@
+/*
+* (C) 2014,2015 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include "apps.h"
+
+#if defined(BOTAN_HAS_COMPRESSION)
+
+#include <botan/compression.h>
+#include <fstream>
+
+namespace {
+
+void do_compress(Transform& comp, std::ifstream& in, std::ostream& out)
+   {
+   secure_vector<byte> buf;
+
+   comp.start();
+
+   while(in.good())
+      {
+      buf.resize(64*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(const std::vector<std::string> &args)
+   {
+   if(args.size() != 2 && args.size() != 3 && args.size() != 4)
+      {
+      std::cout << "Usage: " << args[0] << " input [type] [level]" << std::endl;
+      return 1;
+      }
+
+   const std::string in_file = args[1];
+   std::ifstream in(in_file);
+
+   if(!in.good())
+      {
+      std::cout << "Couldn't read " << in_file << std::endl;
+      return 1;
+      }
+
+   const std::string suffix = args.size() >= 3 ? args[2] : "gz";
+   const size_t level = args.size() >= 4 ? to_u32bit(args[3]) : 9;
+
+   std::unique_ptr<Transform> compress(make_compressor(suffix, level));
+
+   if(!compress)
+      {
+      std::cout << suffix << " compression not supported" << std::endl;
+      return 1;
+      }
+
+   const std::string out_file = in_file + "." + suffix;
+   std::ofstream out(out_file);
+
+   do_compress(*compress, in, out);
+
+   return 0;
+   }
+
+void parse_extension(const std::string& in_file,
+                     std::string& out_file,
+                     std::string& suffix)
+   {
+   auto last_dot = in_file.find_last_of('.');
+   if(last_dot == std::string::npos || last_dot == 0)
+      throw std::runtime_error("No extension detected in filename '" + in_file + "'");
+
+   out_file = in_file.substr(0, last_dot);
+   suffix = in_file.substr(last_dot+1, std::string::npos);
+   }
+
+int uncompress(const std::vector<std::string> &args)
+   {
+   if(args.size() != 2)
+      {
+      std::cout << "Usage: " << args[0] << " <file>" << std::endl;
+      return 1;
+      }
+
+   const std::string in_file = args[1];
+   std::ifstream in(in_file);
+
+   if(!in.good())
+      {
+      std::cout << "Couldn't read '" << args[1] << "'" << std::endl;
+      return 1;
+      }
+
+   std::string out_file, suffix;
+   parse_extension(in_file, out_file, suffix);
+
+   std::ofstream out(out_file);
+
+   std::unique_ptr<Transform> decompress(make_decompressor(suffix));
+
+   if(!decompress)
+      {
+      std::cout << suffix << " decompression not supported" << std::endl;
+      return 1;
+      }
+
+   do_compress(*decompress, in, out);
+
+   return 0;
+   }
+
+REGISTER_APP(compress);
+REGISTER_APP(uncompress);
+
+}
+
+#endif // BOTAN_HAS_COMPRESSION