1 files changed, 116 insertions, 0 deletions
diff --git a/doc/examples/bzip.cpp b/doc/examples/bzip.cpp
new file mode 100644
index 000000000..6137bb6af
--- /dev/null
+++ b/doc/examples/bzip.cpp
@@ -0,0 +1,116 @@
+/*
+* 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;
+   }