Convert compression filters to in-place transforms and refactor

to minimize the amount of logic needed in the files specific to each
library.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/lib/compression/zlib/zlib.h b/src/lib/compression/zlib/zlib.h
new file mode 100644
index 000000000..55da47a0d
--- /dev/null
+++ b/src/lib/compression/zlib/zlib.h
@@ -0,0 +1,61 @@
+/*
+* Zlib Compressor
+* (C) 2001 Peter J Jones
+*     2001-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ZLIB_H__
+#define BOTAN_ZLIB_H__
+
+#include <botan/compression.h>
+
+namespace Botan {
+
+/**
+* Zlib Compression
+*/
+class BOTAN_DLL Zlib_Compression : public Stream_Compression
+   {
+   public:
+      /**
+      * @param level how much effort to use on compressing (0 to 9);
+      *        higher levels are slower but tend to give better
+      *        compression
+      * @param raw_deflate if true no zlib header/trailer will be used
+      */
+      Zlib_Compression(size_t level = 6, bool raw_deflate = false) :
+         m_level(level), m_raw_deflate(raw_deflate) {}
+
+      std::string name() const override { return "Zlib_Compression"; }
+
+   private:
+      Compression_Stream* make_stream() const;
+
+      const size_t m_level;
+      const bool m_raw_deflate;
+   };
+
+/**
+* Zlib Deccompression
+*/
+class BOTAN_DLL Zlib_Decompression : public Stream_Decompression
+   {
+   public:
+      /**
+      * @param raw_deflate if true no zlib header/trailer will be used
+      */
+      Zlib_Decompression( bool raw_deflate = false) : m_raw_deflate(raw_deflate) {}
+
+      std::string name() const override { return "Zlib_Decompression"; }
+
+   private:
+      Compression_Stream* make_stream() const;
+
+      const bool m_raw_deflate;
+   };
+
+}
+
+#endif