143 lines
4 KiB
C++
143 lines
4 KiB
C++
// Copyright (c) 2014, The Monero Project
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. 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.
|
|
//
|
|
// 3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS 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.
|
|
//
|
|
// Parts of this file are originally copyright (c) 2006-2013, Andrey N. Sabelnikov
|
|
|
|
#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
|