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////////////////////////////////////////////////////////////////////////////////
// This source file is part of the ZipArchive library source distribution and
// is Copyrighted 2000 - 2007 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: http://www.artpol-software.com
////////////////////////////////////////////////////////////////////////////////
/**
* \file BytesWriter.h
* Includes the ZipArchiveLib::CBytesWriter class.
*
*/
#if !defined(ZIPARCHIVE_BYTESWRITER_DOT_H)
#define ZIPARCHIVE_BYTESWRITER_DOT_H
#if _MSC_VER > 1000
#pragma once
#endif
#include "ZipCompatibility.h"
namespace ZipArchiveLib
{
/**
Provides implementation for various
buffer operations depending on the current platform and configuration.
*/
class ZIP_API CBytesWriter
{
public:
#ifdef ZIP_ARCHIVE_LITTLE_ENDIAN
/**
Reads \a iCount bytes from \a pSource into \a pDestination.
\param[out] pDestination
The buffer to retrieve data with byte-ordering depending on the machine.
\param[in] pSource
The buffer with little-endian ordered data.
\param iCount
The number of bytes to read.
*/
static void ReadBytes(WORD& uDestination, const char* pSource, int iCount = 2)
{
uDestination = 0;
memcpy(&uDestination, pSource, iCount);
}
static void ReadBytes(DWORD& uDestination, const char* pSource, int iCount = 4)
{
uDestination = 0;
memcpy(&uDestination, pSource, iCount);
}
#ifndef _ZIP_STRICT_U16
static void ReadBytes(int& iDestination, const char* pSource, int iCount)
{
iDestination = 0;
memcpy(&iDestination, pSource, iCount);
}
#endif
/**
Writes \a iCount bytes from \a pSource into \a pDestination.
\param[out] pDestination
The buffer to retrieve little-endian ordered data.
\param[in] pSource
The buffer with byte-ordering depending on the machine.
\param iCount
The number of bytes to write.
*/
static void WriteBytes(char* pDestination, WORD uSource)
{
memcpy(pDestination, &uSource, 2);
}
static void WriteBytes(char* pDestination, DWORD uSource, int iCount = 4)
{
memcpy(pDestination, &uSource, iCount);
}
#ifndef _ZIP_STRICT_U16
static void WriteBytes(char* pDestination, int uSource, int iCount)
{
memcpy(pDestination, &uSource, iCount);
}
#endif
#else
static void ReadBytes(char* pDestination, const char* pSource, int iDestSize, int iCount)
{
int i = iCount - iDestSize;
while (i < 0)
{
*pDestination++ = 0;
i++;
}
for (; i < iCount; i++)
(pDestination)[i] = pSource[iCount - i - 1];
}
static void ReadBytes(WORD& uDestination, const char* pSource, int iCount = 2)
{
ReadBytes((char*)&uDestination, pSource, 2, iCount);
}
static void ReadBytes(DWORD& uDestination, const char* pSource, int iCount = 4)
{
ReadBytes((char*)&uDestination, pSource, 4, iCount);
}
#ifndef _ZIP_STRICT_U16
static void ReadBytes(int& iDestination, const char* pSource, int iCount)
{
ReadBytes((char*)&iDestination, pSource, sizeof(int), iCount);
}
#endif
static void WriteBytes(char* pDestination, WORD uSource)
{
for (int i = 0; i < 2; i++)
pDestination[i] = ((char*)&uSource)[2 - i - 1];
}
static void WriteBytes(char* pDestination, DWORD uSource, int iCount = 4)
{
for (int i = 0; i < iCount; i++)
pDestination[i] = ((char*)&uSource)[4 - i - 1];
}
#ifndef _ZIP_STRICT_U16
static void WriteBytes(char* pDestination, int iSource, int iCount)
{
for (int i = 0; i < iCount; i++)
pDestination[i] = ((char*)&iSource)[sizeof(int) - i - 1];
}
#endif
#endif
static DWORD WriteSafeU32(DWORD uValue)
{
return uValue;
}
#ifdef _ZIP_STRICT_U16
static WORD WriteSafeU16(WORD uValue)
{
return uValue;
}
#else
static WORD WriteSafeU16(int uValue)
{
return (WORD)uValue;
}
#endif
};
}
#endif
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