667 lines
16 KiB
C++
667 lines
16 KiB
C++
/*
|
|
* (c) Copyright Ascensio System SIA 2010-2014
|
|
*
|
|
* This program is a free software product. You can redistribute it and/or
|
|
* modify it under the terms of the GNU Affero General Public License (AGPL)
|
|
* version 3 as published by the Free Software Foundation. In accordance with
|
|
* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
|
|
* that Ascensio System SIA expressly excludes the warranty of non-infringement
|
|
* of any third-party rights.
|
|
*
|
|
* This program is distributed WITHOUT ANY WARRANTY; without even the implied
|
|
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
|
|
* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
|
|
*
|
|
* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
|
|
* EU, LV-1021.
|
|
*
|
|
* The interactive user interfaces in modified source and object code versions
|
|
* of the Program must display Appropriate Legal Notices, as required under
|
|
* Section 5 of the GNU AGPL version 3.
|
|
*
|
|
* Pursuant to Section 7(b) of the License you must retain the original Product
|
|
* logo when distributing the program. Pursuant to Section 7(e) we decline to
|
|
* grant you any rights under trademark law for use of our trademarks.
|
|
*
|
|
* All the Product's GUI elements, including illustrations and icon sets, as
|
|
* well as technical writing content are licensed under the terms of the
|
|
* Creative Commons Attribution-ShareAlike 4.0 International. See the License
|
|
* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
|
|
*
|
|
*/
|
|
#pragma once
|
|
#include "../XmlUtils.h"
|
|
#include "../ASCUtils.h"
|
|
#include "windows.h"
|
|
|
|
#ifndef pow2_16
|
|
#define pow2_16 65536
|
|
#endif
|
|
|
|
class CFile
|
|
{
|
|
public:
|
|
CFile()
|
|
{
|
|
m_hFileHandle = NULL;
|
|
m_lFileSize = 0;
|
|
m_lFilePosition = 0;
|
|
}
|
|
|
|
virtual ~CFile()
|
|
{
|
|
CloseFile();
|
|
}
|
|
|
|
virtual HRESULT OpenFile(CString FileName)
|
|
{
|
|
CloseFile();
|
|
|
|
HRESULT hRes = S_OK;
|
|
DWORD AccessMode = GENERIC_READ;
|
|
DWORD ShareMode = FILE_SHARE_READ;
|
|
DWORD Disposition = OPEN_EXISTING;
|
|
m_hFileHandle = ::CreateFile(FileName, AccessMode, ShareMode, NULL, Disposition, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
|
|
if (NULL == m_hFileHandle || INVALID_HANDLE_VALUE == m_hFileHandle)
|
|
hRes = S_FALSE;
|
|
else
|
|
{
|
|
ULARGE_INTEGER nTempSize;
|
|
nTempSize.LowPart = ::GetFileSize(m_hFileHandle, &nTempSize.HighPart);
|
|
m_lFileSize = nTempSize.QuadPart;
|
|
|
|
SetPosition(0);
|
|
}
|
|
|
|
return hRes;
|
|
}
|
|
|
|
virtual HRESULT OpenFileRW(CString FileName)
|
|
{
|
|
CloseFile();
|
|
|
|
HRESULT hRes = S_OK;
|
|
DWORD AccessMode = GENERIC_READ | GENERIC_WRITE;
|
|
DWORD ShareMode = FILE_SHARE_READ;
|
|
DWORD Disposition = OPEN_EXISTING;
|
|
m_hFileHandle = ::CreateFile(FileName, AccessMode, ShareMode, NULL, Disposition, 0, 0);
|
|
|
|
if (NULL == m_hFileHandle || INVALID_HANDLE_VALUE == m_hFileHandle)
|
|
{
|
|
hRes = S_FALSE;
|
|
}
|
|
else
|
|
{
|
|
ULARGE_INTEGER nTempSize;
|
|
nTempSize.LowPart = ::GetFileSize(m_hFileHandle, &nTempSize.HighPart);
|
|
m_lFileSize = nTempSize.QuadPart;
|
|
|
|
SetPosition(0);
|
|
}
|
|
|
|
return hRes;
|
|
}
|
|
|
|
HRESULT ReadFile(BYTE* pData, DWORD nBytesToRead)
|
|
{
|
|
DWORD nBytesRead = 0;
|
|
if(NULL == pData)
|
|
return S_FALSE;
|
|
|
|
if(m_hFileHandle && (pData))
|
|
{
|
|
SetPosition(m_lFilePosition);
|
|
::ReadFile(m_hFileHandle, pData, nBytesToRead, &nBytesRead, NULL);
|
|
m_lFilePosition += nBytesRead;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
HRESULT ReadFile2(BYTE* pData, DWORD nBytesToRead)
|
|
{
|
|
DWORD nBytesRead = 0;
|
|
if(NULL == pData)
|
|
return S_FALSE;
|
|
|
|
if(m_hFileHandle && (pData))
|
|
{
|
|
SetPosition(m_lFilePosition);
|
|
::ReadFile(m_hFileHandle, pData, nBytesToRead, &nBytesRead, NULL);
|
|
m_lFilePosition += nBytesRead;
|
|
|
|
for (size_t index = 0; index < nBytesToRead / 2; ++index)
|
|
{
|
|
BYTE temp = pData[index];
|
|
pData[index] = pData[nBytesToRead - index - 1];
|
|
pData[nBytesToRead - index - 1] = temp;
|
|
}
|
|
}
|
|
return S_OK;
|
|
}
|
|
HRESULT ReadFile3(void* pData, DWORD nBytesToRead)
|
|
{
|
|
DWORD nBytesRead = 0;
|
|
if(NULL == pData)
|
|
return S_FALSE;
|
|
|
|
if(m_hFileHandle && (pData))
|
|
{
|
|
SetPosition(m_lFilePosition);
|
|
::ReadFile(m_hFileHandle, pData, nBytesToRead, &nBytesRead, NULL);
|
|
m_lFilePosition += nBytesRead;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
HRESULT WriteFile(void* pData, DWORD nBytesToWrite)
|
|
{
|
|
if(m_hFileHandle)
|
|
{
|
|
DWORD dwWritten = 0;
|
|
::WriteFile(m_hFileHandle, pData, nBytesToWrite, &dwWritten, NULL);
|
|
m_lFilePosition += nBytesToWrite;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
HRESULT WriteFile2(void* pData, DWORD nBytesToWrite)
|
|
{
|
|
if(m_hFileHandle)
|
|
{
|
|
BYTE* mem = new BYTE[nBytesToWrite];
|
|
memcpy(mem, pData, nBytesToWrite);
|
|
|
|
for (size_t index = 0; index < nBytesToWrite / 2; ++index)
|
|
{
|
|
BYTE temp = mem[index];
|
|
mem[index] = mem[nBytesToWrite - index - 1];
|
|
mem[nBytesToWrite - index - 1] = temp;
|
|
}
|
|
|
|
DWORD dwWritten = 0;
|
|
::WriteFile(m_hFileHandle, (void*)mem, nBytesToWrite, &dwWritten, NULL);
|
|
m_lFilePosition += nBytesToWrite;
|
|
RELEASEARRAYOBJECTS(mem);
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
HRESULT CreateFile(CString strFileName)
|
|
{
|
|
CloseFile();
|
|
DWORD AccessMode = GENERIC_WRITE;
|
|
DWORD ShareMode = FILE_SHARE_WRITE;
|
|
DWORD Disposition = CREATE_ALWAYS;
|
|
m_hFileHandle = ::CreateFile(strFileName, AccessMode, ShareMode, NULL, Disposition, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
return SetPosition(0);
|
|
}
|
|
HRESULT SetPosition( ULONG64 nPos )
|
|
{
|
|
if (m_hFileHandle && nPos < (ULONG)m_lFileSize)
|
|
{
|
|
LARGE_INTEGER nTempPos;
|
|
nTempPos.QuadPart = nPos;
|
|
::SetFilePointer(m_hFileHandle, nTempPos.LowPart, &nTempPos.HighPart, FILE_BEGIN);
|
|
m_lFilePosition = nPos;
|
|
return S_OK;
|
|
}
|
|
else
|
|
{
|
|
return (INVALID_HANDLE_VALUE == m_hFileHandle) ? S_FALSE : S_OK;
|
|
}
|
|
}
|
|
LONG64 GetPosition()
|
|
{
|
|
return m_lFilePosition;
|
|
}
|
|
HRESULT SkipBytes(ULONG64 nCount)
|
|
{
|
|
return SetPosition(m_lFilePosition + nCount);
|
|
}
|
|
|
|
HRESULT CloseFile()
|
|
{
|
|
m_lFileSize = 0;
|
|
m_lFilePosition = 0;
|
|
RELEASEHANDLE(m_hFileHandle);
|
|
return S_OK;
|
|
}
|
|
|
|
ULONG64 GetFileSize()
|
|
{
|
|
return m_lFileSize;
|
|
}
|
|
|
|
HRESULT WriteReserved(DWORD dwCount)
|
|
{
|
|
BYTE* buf = new BYTE[dwCount];
|
|
memset(buf, 0, (size_t)dwCount);
|
|
HRESULT hr = WriteFile(buf, dwCount);
|
|
RELEASEARRAYOBJECTS(buf);
|
|
return hr;
|
|
}
|
|
HRESULT WriteReserved2(DWORD dwCount)
|
|
{
|
|
BYTE* buf = new BYTE[dwCount];
|
|
memset(buf, 0xFF, (size_t)dwCount);
|
|
HRESULT hr = WriteFile(buf, dwCount);
|
|
RELEASEARRAYOBJECTS(buf);
|
|
return hr;
|
|
}
|
|
HRESULT WriteReservedTo(DWORD dwPoint)
|
|
{
|
|
if (m_lFilePosition >= dwPoint)
|
|
return S_OK;
|
|
|
|
DWORD dwCount = dwPoint - (DWORD)m_lFilePosition;
|
|
BYTE* buf = new BYTE[dwCount];
|
|
memset(buf, 0, (size_t)dwCount);
|
|
HRESULT hr = WriteFile(buf, dwCount);
|
|
RELEASEARRAYOBJECTS(buf);
|
|
return hr;
|
|
}
|
|
HRESULT SkipReservedTo(DWORD dwPoint)
|
|
{
|
|
if (m_lFilePosition >= dwPoint)
|
|
return S_OK;
|
|
|
|
DWORD dwCount = dwPoint - (DWORD)m_lFilePosition;
|
|
return SkipBytes(dwCount);
|
|
}
|
|
|
|
void WriteStringUTF8(CString& strXml)
|
|
{
|
|
int nLength = strXml.GetLength();
|
|
|
|
CStringA saStr;
|
|
|
|
#ifdef UNICODE
|
|
|
|
WideCharToMultiByte(CP_UTF8, 0, strXml.GetBuffer(), nLength + 1, saStr.GetBuffer(nLength*3 + 1), nLength*3, NULL, NULL);
|
|
saStr.ReleaseBuffer();
|
|
#else
|
|
wchar_t* pWStr = new wchar_t[nLength + 1];
|
|
if (!pWStr)
|
|
return;
|
|
|
|
|
|
pWStr[nLength] = 0;
|
|
|
|
|
|
MultiByteToWideChar(CP_ACP, 0, strXml, nLength, pWStr, nLength);
|
|
|
|
int nLengthW = (int)wcslen(pWStr);
|
|
|
|
|
|
WideCharToMultiByte(CP_UTF8, 0, pWStr, nLengthW + 1, saStr.GetBuffer(nLengthW*3 + 1), nLengthW*3, NULL, NULL);
|
|
saStr.ReleaseBuffer();
|
|
|
|
delete[] pWStr;
|
|
#endif
|
|
|
|
WriteFile((void*)saStr.GetBuffer(), saStr.GetLength());
|
|
}
|
|
|
|
LONG GetProgress()
|
|
{
|
|
if (0 >= m_lFileSize)
|
|
return -1;
|
|
|
|
double dVal = (double)(100 * m_lFilePosition);
|
|
LONG lProgress = (LONG)(dVal / m_lFileSize);
|
|
return lProgress;
|
|
}
|
|
|
|
protected:
|
|
HANDLE m_hFileHandle;
|
|
LONG64 m_lFileSize;
|
|
LONG64 m_lFilePosition;
|
|
};
|
|
|
|
namespace CDirectory
|
|
{
|
|
static CString GetFolderName(CString strFolderPath)
|
|
{
|
|
int n1 = strFolderPath.ReverseFind('\\');
|
|
if (-1 == n1)
|
|
return _T("");
|
|
|
|
return strFolderPath.Mid(n1 + 1);
|
|
}
|
|
static BOOL OpenFile(CString strFolderPath, CString strFileName, CFile* pFile)
|
|
{
|
|
CString strFile = strFolderPath + '\\' + strFileName;
|
|
return (S_OK == pFile->OpenFile(strFile));
|
|
}
|
|
static BOOL CreateFile(CString strFolderPath, CString strFileName, CFile* pFile)
|
|
{
|
|
CString strFile = strFolderPath + '\\' + strFileName;
|
|
return (S_OK == pFile->CreateFile(strFile));
|
|
}
|
|
static BOOL CreateDirectory(CString strFolderPathRoot, CString strFolderName)
|
|
{
|
|
CString strFolder = strFolderPathRoot + '\\' + strFolderName;
|
|
return ::CreateDirectory(strFolder, NULL);
|
|
}
|
|
static BOOL CreateDirectory(CString strFolderPath)
|
|
{
|
|
return ::CreateDirectory(strFolderPath, NULL);
|
|
}
|
|
|
|
static BOOL MoveFile(CString strExists, CString strNew, LPPROGRESS_ROUTINE lpFunc, LPVOID lpData)
|
|
{
|
|
#if (_WIN32_WINNT >= 0x0500)
|
|
return ::MoveFileWithProgress(strExists, strNew, lpFunc, lpData, MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH);
|
|
#else
|
|
return ::MoveFileEx(strExists, strNew, MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH);
|
|
#endif
|
|
}
|
|
|
|
static BOOL CopyFile(CString strExists, CString strNew, LPPROGRESS_ROUTINE lpFunc, LPVOID lpData)
|
|
{
|
|
DeleteFile(strNew);
|
|
return ::CopyFileEx(strExists, strNew, lpFunc, lpData, FALSE, 0);
|
|
}
|
|
|
|
static CString GetUnder(CString strFolderPathRoot, CString strFolderName)
|
|
{
|
|
CString strFolder = strFolderPathRoot + '\\' + strFolderName;
|
|
return strFolder;
|
|
}
|
|
|
|
static CString GetFileName(CString strFullName)
|
|
{
|
|
int nStart = strFullName.ReverseFind('\\');
|
|
CString strName = strFullName.Mid(nStart + 1);
|
|
return strName;
|
|
}
|
|
|
|
static CString BYTEArrayToString(BYTE* arr, size_t nCount)
|
|
{
|
|
CString str;
|
|
for (size_t index = 0; index < nCount; ++index)
|
|
{
|
|
if ('\0' != (char)(arr[index]))
|
|
str += (char)(arr[index]);
|
|
}
|
|
if (str.GetLength() == 0)
|
|
str = _T("0");
|
|
return str;
|
|
}
|
|
|
|
static CStringW BYTEArrayToStringW(BYTE* arr, size_t nCount)
|
|
{
|
|
CStringW str;
|
|
wchar_t* pArr = (wchar_t*)arr;
|
|
size_t nCountNew = nCount / 2;
|
|
for (size_t index = 0; index < nCountNew; ++index)
|
|
{
|
|
str += pArr[index];
|
|
}
|
|
if (str.GetLength() == 0)
|
|
str = _T("0");
|
|
return str;
|
|
}
|
|
|
|
static CString BYTEArrayToString2(USHORT* arr, size_t nCount)
|
|
{
|
|
CString str;
|
|
for (size_t index = 0; index < nCount; ++index)
|
|
{
|
|
if ('\0' != (char)(arr[index]))
|
|
str += (char)(arr[index]);
|
|
}
|
|
if (str.GetLength() == 0)
|
|
str = _T("0");
|
|
return str;
|
|
}
|
|
|
|
static CString ToString(DWORD val)
|
|
{
|
|
CString str = _T("");
|
|
str.Format(_T("%d"), (LONG)val);
|
|
return str;
|
|
}
|
|
|
|
static CString ToString(UINT64 val, bool bInit)
|
|
{
|
|
CString strCoarse = ToString((DWORD)(val >> 32));
|
|
if (_T("0") != strCoarse)
|
|
{
|
|
return strCoarse + ToString((DWORD)val);
|
|
}
|
|
|
|
return ToString((DWORD)val);
|
|
}
|
|
|
|
static UINT64 GetUINT64(CString strVal)
|
|
{
|
|
UINT64 nRet = 0;
|
|
int nLen = strVal.GetLength();
|
|
while (nLen > 0)
|
|
{
|
|
int nDig = XmlUtils::GetDigit(strVal[0]);
|
|
nRet *= 10;
|
|
nRet += nDig;
|
|
strVal.Delete(0);
|
|
--nLen;
|
|
}
|
|
return nRet;
|
|
}
|
|
static UINT GetUINT(CString strVal)
|
|
{
|
|
return (UINT)GetUINT64(strVal);
|
|
}
|
|
|
|
static void WriteValueToNode(CString strName, DWORD value, XmlUtils::CXmlWriter* pWriter)
|
|
{
|
|
pWriter->WriteNodeBegin(strName);
|
|
pWriter->WriteString(CDirectory::ToString(value));
|
|
pWriter->WriteNodeEnd(strName);
|
|
}
|
|
static void WriteValueToNode(CString strName, LONG value, XmlUtils::CXmlWriter* pWriter)
|
|
{
|
|
pWriter->WriteNodeBegin(strName);
|
|
CString strLONG = _T("");
|
|
strLONG.Format(_T("%d"), value);
|
|
pWriter->WriteString(strLONG);
|
|
pWriter->WriteNodeEnd(strName);
|
|
}
|
|
static void WriteValueToNode(CString strName, CString value, XmlUtils::CXmlWriter* pWriter)
|
|
{
|
|
pWriter->WriteNodeBegin(strName);
|
|
pWriter->WriteString(value);
|
|
pWriter->WriteNodeEnd(strName);
|
|
}
|
|
static void WriteValueToNode(CString strName, WCHAR value, XmlUtils::CXmlWriter* pWriter)
|
|
{
|
|
CString str(value);
|
|
|
|
pWriter->WriteNodeBegin(strName);
|
|
pWriter->WriteString(str);
|
|
pWriter->WriteNodeEnd(strName);
|
|
}
|
|
static void WriteValueToNode(CString strName, bool value, XmlUtils::CXmlWriter* pWriter)
|
|
{
|
|
pWriter->WriteNodeBegin(strName);
|
|
CString str = (true == value) ? _T("1") : _T("0");
|
|
pWriter->WriteString(str);
|
|
pWriter->WriteNodeEnd(strName);
|
|
}
|
|
static double FixedPointToDouble(DWORD point)
|
|
{
|
|
double dVal = (double)(point % pow2_16) / pow2_16;
|
|
dVal += (point / pow2_16);
|
|
return dVal;
|
|
}
|
|
static LONG NormFixedPoint(DWORD point, LONG base)
|
|
{
|
|
return (LONG)(FixedPointToDouble(point) * base);
|
|
}
|
|
static void SaveToFile(CString strFileName, CString strXml)
|
|
{
|
|
int nLength = strXml.GetLength();
|
|
|
|
CStringA saStr;
|
|
|
|
#ifdef UNICODE
|
|
|
|
WideCharToMultiByte(CP_UTF8, 0, strXml.GetBuffer(), nLength + 1, saStr.GetBuffer(nLength*3 + 1), nLength*3, NULL, NULL);
|
|
saStr.ReleaseBuffer();
|
|
#else
|
|
wchar_t* pWStr = new wchar_t[nLength + 1];
|
|
if (!pWStr)
|
|
return;
|
|
|
|
|
|
pWStr[nLength] = 0;
|
|
|
|
|
|
MultiByteToWideChar(CP_ACP, 0, strXml, nLength, pWStr, nLength);
|
|
|
|
int nLengthW = (int)wcslen(pWStr);
|
|
|
|
|
|
WideCharToMultiByte(CP_UTF8, 0, pWStr, nLengthW + 1, saStr.GetBuffer(nLengthW*3 + 1), nLengthW*3, NULL, NULL);
|
|
saStr.ReleaseBuffer();
|
|
|
|
delete[] pWStr;
|
|
#endif
|
|
|
|
CFile oFile;
|
|
oFile.CreateFile(strFileName);
|
|
oFile.WriteFile((void*)saStr.GetBuffer(), saStr.GetLength());
|
|
oFile.CloseFile();
|
|
}
|
|
}
|
|
|
|
namespace StreamUtils
|
|
{
|
|
static BYTE ReadBYTE(IStream* pStream)
|
|
{
|
|
BYTE lMem = 0;
|
|
ULONG lReadByte = 0;
|
|
pStream->Read(&lMem, 1, &lReadByte);
|
|
if (lReadByte < 1)
|
|
{
|
|
lMem = 0;
|
|
}
|
|
return lMem;
|
|
}
|
|
static WORD ReadWORD(IStream* pStream)
|
|
{
|
|
WORD lWord = 0;
|
|
BYTE pMem[2];
|
|
ULONG lReadByte = 0;
|
|
pStream->Read(pMem, 2, &lReadByte);
|
|
if (lReadByte == 2)
|
|
{
|
|
lWord = ((pMem[1] << 8) | pMem[0]);
|
|
}
|
|
return lWord;
|
|
}
|
|
static DWORD ReadDWORD(IStream* pStream)
|
|
{
|
|
DWORD lDWord = 0;
|
|
BYTE pMem[4];
|
|
ULONG lReadByte = 0;
|
|
pStream->Read(pMem, 4, &lReadByte);
|
|
|
|
#ifdef _DEBUG
|
|
ATLASSERT(4 == lReadByte);
|
|
#endif
|
|
|
|
if (lReadByte == 4)
|
|
{
|
|
lDWord = ((pMem[3] << 24) | (pMem[2] << 16) | (pMem[1] << 8) | pMem[0]);
|
|
}
|
|
return lDWord;
|
|
}
|
|
static SHORT ReadSHORT(IStream* pStream)
|
|
{
|
|
return (SHORT)ReadWORD(pStream);
|
|
}
|
|
static LONG ReadLONG(IStream* pStream)
|
|
{
|
|
return (LONG)ReadDWORD(pStream);
|
|
}
|
|
|
|
static FLOAT ReadFLOAT ( IStream* pStream )
|
|
{
|
|
FLOAT Value = 0.0f;
|
|
pStream->Read ( &Value, sizeof (FLOAT), NULL );
|
|
return Value;
|
|
}
|
|
|
|
static CString ReadCString(IStream* pStream, LONG lLen)
|
|
{
|
|
char* pData = new char[lLen + 1];
|
|
ULONG lReadByte = 0;
|
|
pStream->Read(pData, lLen, &lReadByte);
|
|
|
|
pData[lLen] = 0;
|
|
|
|
CString str(pData);
|
|
|
|
delete[] pData;
|
|
return str;
|
|
}
|
|
static CStringW ReadCStringW(IStream* pStream, LONG lLen)
|
|
{
|
|
wchar_t* pData = new wchar_t[lLen + 1];
|
|
ULONG lReadByte = 0;
|
|
pStream->Read(pData, 2 * lLen, &lReadByte);
|
|
|
|
pData[lLen] = 0;
|
|
|
|
CStringW str(pData);
|
|
delete[] pData;
|
|
return str;
|
|
}
|
|
static CString ConvertCStringWToCString(CStringW& strW)
|
|
{
|
|
|
|
|
|
|
|
BSTR bstr = strW.AllocSysString();
|
|
CString str(bstr);
|
|
SysFreeString(bstr);
|
|
|
|
return str;
|
|
}
|
|
static void StreamSeek(long lOffset, IStream* pStream)
|
|
{
|
|
LARGE_INTEGER li;
|
|
li.LowPart = lOffset;
|
|
li.HighPart = 0;
|
|
pStream->Seek(li, STREAM_SEEK_SET, NULL);
|
|
}
|
|
static void StreamPosition(long& lPosition, IStream* pStream)
|
|
{
|
|
ULARGE_INTEGER uli;
|
|
LARGE_INTEGER li;
|
|
li.LowPart = 0;
|
|
li.HighPart = 0;
|
|
pStream->Seek(li, STREAM_SEEK_CUR, &uli);
|
|
lPosition = (LONG)uli.LowPart;
|
|
}
|
|
static void StreamSkip(long lCount, IStream* pStream)
|
|
{
|
|
LARGE_INTEGER li;
|
|
li.LowPart = lCount;
|
|
li.HighPart = 0;
|
|
pStream->Seek(li, STREAM_SEEK_CUR, NULL);
|
|
}
|
|
static void StreamSkipBack(long lCount, IStream* pStream)
|
|
{
|
|
ULARGE_INTEGER ulPos;
|
|
LARGE_INTEGER li;
|
|
li.LowPart = 0;
|
|
li.HighPart = 0;
|
|
pStream->Seek(li, STREAM_SEEK_CUR, &ulPos);
|
|
|
|
StreamSeek((long)(ulPos.LowPart - lCount), pStream);
|
|
}
|
|
}
|