1 files changed, 110 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/compression/bzip2/bzip2.cpp b/comm/third_party/botan/src/lib/compression/bzip2/bzip2.cpp
new file mode 100644
index 0000000000..c9dfc2ce82
--- /dev/null
+++ b/comm/third_party/botan/src/lib/compression/bzip2/bzip2.cpp
@@ -0,0 +1,110 @@
+/*
+* Bzip2 Compressor
+* (C) 2001 Peter J Jones
+*     2001-2007,2014 Jack Lloyd
+*     2006 Matt Johnston
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/bzip2.h>
+#include <botan/exceptn.h>
+#include <botan/internal/compress_utils.h>
+
+#define BZ_NO_STDIO
+#include <bzlib.h>
+
+namespace Botan {
+
+namespace {
+
+class Bzip2_Stream : public Zlib_Style_Stream<bz_stream, char>
+   {
+   public:
+      Bzip2_Stream()
+         {
+         streamp()->opaque = alloc();
+         streamp()->bzalloc = Compression_Alloc_Info::malloc<int>;
+         streamp()->bzfree = Compression_Alloc_Info::free;
+         }
+
+      uint32_t run_flag() const override { return BZ_RUN; }
+      uint32_t flush_flag() const override { return BZ_FLUSH; }
+      uint32_t finish_flag() const override { return BZ_FINISH; }
+   };
+
+class Bzip2_Compression_Stream final : public Bzip2_Stream
+   {
+   public:
+      explicit Bzip2_Compression_Stream(size_t block_size)
+         {
+         /*
+         * Defaults to 900k blocks as the computation cost of
+         * compression is not overly affected by the size, though
+         * more memory is required.
+         */
+         if(block_size == 0 || block_size >= 9)
+            block_size = 9;
+
+         int rc = BZ2_bzCompressInit(streamp(), block_size, 0, 0);
+
+         if(rc != BZ_OK)
+            throw Compression_Error("BZ2_bzCompressInit", ErrorType::Bzip2Error, rc);
+         }
+
+      ~Bzip2_Compression_Stream()
+         {
+         BZ2_bzCompressEnd(streamp());
+         }
+
+      bool run(uint32_t flags) override
+         {
+         int rc = BZ2_bzCompress(streamp(), flags);
+
+         if(rc < 0)
+            throw Compression_Error("BZ2_bzCompress", ErrorType::Bzip2Error, rc);
+
+         return (rc == BZ_STREAM_END);
+         }
+   };
+
+class Bzip2_Decompression_Stream final : public Bzip2_Stream
+   {
+   public:
+      Bzip2_Decompression_Stream()
+         {
+         int rc = BZ2_bzDecompressInit(streamp(), 0, 0);
+
+         if(rc != BZ_OK)
+            throw Compression_Error("BZ2_bzDecompressInit", ErrorType::Bzip2Error, rc);
+         }
+
+      ~Bzip2_Decompression_Stream()
+         {
+         BZ2_bzDecompressEnd(streamp());
+         }
+
+      bool run(uint32_t) override
+         {
+         int rc = BZ2_bzDecompress(streamp());
+
+         if(rc != BZ_OK && rc != BZ_STREAM_END)
+            throw Compression_Error("BZ2_bzDecompress", ErrorType::Bzip2Error, rc);
+
+         return (rc == BZ_STREAM_END);
+         }
+   };
+
+}
+
+Compression_Stream* Bzip2_Compression::make_stream(size_t comp_level) const
+   {
+   return new Bzip2_Compression_Stream(comp_level);
+   }
+
+Compression_Stream* Bzip2_Decompression::make_stream() const
+   {
+   return new Bzip2_Decompression_Stream;
+   }
+
+}