moved all stuff to github

1 files changed, 139 insertions, 0 deletions

diff --git a/contrib/epee/include/zlib_helper.h b/contrib/epee/include/zlib_helper.h
new file mode 100644
index 000000000..46c7f48e6
--- /dev/null
+++ b/contrib/epee/include/zlib_helper.h
@@ -0,0 +1,139 @@
+// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// * Neither the name of the Andrey N. Sabelnikov nor the
+// names of its contributors may be used to endorse or promote products
+// derived from this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+
+#pragma once
+extern "C" { 
+#include "zlib/zlib.h"
+}
+#pragma comment(lib, "zlibstat.lib")
+
+namespace epee 
+{
+namespace zlib_helper
+{
+	inline 
+	bool pack(std::string& target){
+		std::string result_packed_buff;
+
+		z_stream    zstream = {0};
+		int ret = deflateInit(&zstream, Z_DEFAULT_COMPRESSION);
+		if(target.size())
+		{
+
+			
+			result_packed_buff.resize(target.size()*2, 'X');
+
+			zstream.next_in = (Bytef*)target.data();
+			zstream.avail_in = (uInt)target.size();
+			zstream.next_out = (Bytef*)result_packed_buff.data();
+			zstream.avail_out = (uInt)result_packed_buff.size();
+
+			ret = deflate(&zstream, Z_FINISH);
+			CHECK_AND_ASSERT_MES(ret>=0, false, "Failed to deflate. err = " << ret);
+
+			if(result_packed_buff.size() != zstream.avail_out)
+				result_packed_buff.resize(result_packed_buff.size()-zstream.avail_out);
+
+			
+			result_packed_buff.erase(0, 2);
+			target.swap(result_packed_buff);
+		}
+
+		deflateEnd(& zstream );
+		return true;
+	}
+
+	inline bool unpack(std::string& target)
+	{
+		z_stream    zstream = {0};
+		int ret = inflateInit(&zstream);//
+
+		std::string decode_summary_buff;
+		size_t	ungzip_buff_size = target.size() * 0x30;
+		std::string current_decode_buff(ungzip_buff_size, 'X');
+
+		while(target.size())
+		{
+
+			
+			zstream.next_out = (Bytef*)current_decode_buff.data();
+			zstream.avail_out = (uInt)ungzip_buff_size;
+
+			int flag = Z_SYNC_FLUSH;
+			
+			static char dummy_head[2] =
+			{
+				0x8 + 0x7 * 0x10,
+				(((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF,
+			};
+			zstream.next_in = (Bytef*) dummy_head;
+			zstream.avail_in = sizeof(dummy_head);
+			ret = inflate(&zstream, Z_NO_FLUSH);
+			if (ret != Z_OK)
+			{
+				LOCAL_ASSERT(0);
+				return false;
+			}
+			
+			zstream.next_in = (Bytef*)target.data();
+			zstream.avail_in = (uInt)target.size();
+
+			ret = inflate(&zstream, Z_SYNC_FLUSH);
+			if (ret != Z_OK && ret != Z_STREAM_END)
+			{
+				LOCAL_ASSERT(0);
+				return false;
+			}
+
+			
+			target.erase(0, target.size()-zstream.avail_in);
+
+			
+			if(ungzip_buff_size == zstream.avail_out)
+			{
+				LOG_ERROR("Can't unpack buffer");
+				return false;
+			}
+
+			
+			current_decode_buff.resize(ungzip_buff_size - zstream.avail_out);
+			if(decode_summary_buff.size())
+				decode_summary_buff += current_decode_buff;
+			else
+				current_decode_buff.swap(decode_summary_buff);
+
+			current_decode_buff.resize(ungzip_buff_size);
+		}
+
+		inflateEnd(&zstream );
+
+		decode_summary_buff.swap(target);
+		return 1;
+	}
+
+};
+}//namespace epee