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////////////////////////////////////////////////////////////////////////////////
// This source file is part of the ZipArchive Library Open Source distribution
// and is Copyrighted 2000 - 2022 by Artpol Software - Tadeusz Dracz
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// For the licensing details refer to the License.txt file.
//
// Web Site: https://www.artpol-software.com
////////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "ZipCompressor.h"
#include "BytesWriter.h"
#include "DeflateCompressor.h"
using namespace ZipArchiveLib;
CZipCompressor* CZipCompressor::CreateCompressor(WORD uMethod, CZipStorage* pStorage)
{
if (uMethod == methodStore || uMethod == methodDeflate)
return new CDeflateCompressor(pStorage);
return NULL;
}
void CZipCompressor::UpdateFileCrc(const void *pBuffer, DWORD uSize)
{
m_pFile->m_uCrc32 = (DWORD)zarch_crc32(m_pFile->m_uCrc32, (zarch_Bytef*)pBuffer, uSize);
}
void CZipCompressor::UpdateCrc(const void *pBuffer, DWORD uSize)
{
m_uCrc32 = (DWORD)zarch_crc32(m_uCrc32, (zarch_Bytef*)pBuffer, uSize);
}
void CZipCompressor::UpdateOptions(const COptionsMap& optionsMap)
{
const COptions* pOptions = GetOptions();
if (pOptions == NULL)
return;
const COptions* pNewOptions = optionsMap.Get(pOptions->GetType());
if (pNewOptions != NULL)
UpdateOptions(pNewOptions);
}
void CZipCompressor::InitBuffer()
{
// This should be greater that 64k for deflate when creating offsets pairs is enabled
// otherwise deflate will not be able to write one block in one go and will never report
// a flushed block for low-compressable data
const COptions* pOptions = GetOptions();
DWORD bufferSize = 0;
if (pOptions != NULL)
bufferSize = pOptions->m_iBufferSize;
if (bufferSize == 0)
bufferSize = COptions::cDefaultBufferSize;
m_pBuffer.Allocate(bufferSize);
}
void CZipCompressor::COptionsMap::Set(const CZipCompressor::COptions* pOptions)
{
if (pOptions == NULL)
return;
int iType = pOptions->GetType();
Remove(iType);
SetAt(iType, pOptions->Clone());
}
CZipCompressor::COptions* CZipCompressor::COptionsMap::Get(int iType) const
{
COptions* pTemp = NULL;
if (Lookup(iType, pTemp))
return pTemp;
else
return NULL;
}
void CZipCompressor::COptionsMap::Remove(int iType)
{
COptions* pTemp = Get(iType);
if (pTemp != NULL)
{
delete pTemp;
RemoveKey(iType);
}
}
CZipCompressor::COptionsMap::~COptionsMap()
{
COptionsMap::iterator iter = GetStartPosition();
while (IteratorValid(iter))
{
COptions* pOptions = NULL;
int iDummyType;
GetNextAssoc(iter, iDummyType, pOptions);
delete pOptions;
}
RemoveAll();
}
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