ULONGLONG CMemFile::Seek( LONGLONG lOff, UINT nFrom )
/***************************************************/
{
switch( nFrom ) {
case begin:
if( lOff < 0 ) {
throw new CFileException( CFileException::badSeek );
}
m_nPosition = (SIZE_T)lOff;
break;
case end:
if( lOff > 0 ) {
throw new CFileException( CFileException::badSeek );
}
m_nPosition = m_nFileSize - (SIZE_T)lOff;
break;
default:
if( m_nPosition + lOff < 0 ) {
throw new CFileException( CFileException::badSeek );
}
m_nPosition += (SIZE_T)lOff;
break;
}
GrowFile( m_nPosition );
return( m_nPosition );
}
void CSafeMemFile::WriteUInt8(uint8 nVal)
{
if (m_nPosition + sizeof(uint8) > m_nBufferSize)
GrowFile(m_nPosition + sizeof(uint8));
*(m_lpBuffer + m_nPosition++) = nVal;
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
}
void CSafeMemFile::WriteUInt64(uint64 nVal)
{
if (m_nPosition + sizeof(uint64) > m_nBufferSize)
GrowFile(m_nPosition + sizeof(uint64));
*((uint64*)(m_lpBuffer + m_nPosition)) = nVal;
m_nPosition += sizeof(uint64);
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
}
void CMemFile::Write( const void *lpBuf, UINT nCount )
/****************************************************/
{
if( m_nPosition + nCount >= m_nFileSize ) {
m_nFileSize = m_nPosition + nCount;
GrowFile( m_nFileSize );
}
Memcpy( m_lpBuffer + m_nPosition, (const BYTE *)lpBuf, nCount );
m_nPosition += nCount;
}
MemStream::MemStream( unsigned long nLen ) {
m_nGrowBytes = 1024;
m_nPosition = 0;
m_nBufferSize = 0;
m_nFileSize = 0;
m_pBuffer = NULL;
m_bAutoDelete = true;
GrowFile( nLen );
}
void MemStream::SetLength( unsigned long nNewLen ) {
if ( nNewLen > m_nBufferSize ) {
GrowFile( nNewLen );
}
if ( nNewLen < m_nPosition ) {
m_nPosition = nNewLen;
}
m_nFileSize = nNewLen;
}
void CMemFile::SetLength(DWORD dwNewLen)
{
ASSERT_VALID(this);
if (dwNewLen > m_nBufferSize)
GrowFile(dwNewLen);
if (dwNewLen < m_nPosition)
m_nPosition = dwNewLen;
m_nFileSize = dwNewLen;
ASSERT_VALID(this);
}
void CSafeMemFile::WriteHash16(const uchar* pVal)
{
if (m_nPosition + sizeof(uint32)*4 > m_nBufferSize)
GrowFile(m_nPosition + sizeof(uint32)*4);
uint32* pUInt32 = (uint32*)(m_lpBuffer + m_nPosition);
pUInt32[0] = ((uint32*)pVal)[0];
pUInt32[1] = ((uint32*)pVal)[1];
pUInt32[2] = ((uint32*)pVal)[2];
pUInt32[3] = ((uint32*)pVal)[3];
m_nPosition += sizeof(uint32)*4;
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
}
void CSafeMemFile::WriteUInt128(const Kademlia::CUInt128* pVal)
{
if (m_nPosition + sizeof(uint32)*4 > m_nBufferSize)
GrowFile(m_nPosition + sizeof(uint32)*4);
uint32* pUInt32 = (uint32*)(m_lpBuffer + m_nPosition);
const uint32* pUInt32Val = (uint32*)pVal->GetData();
pUInt32[0] = pUInt32Val[0];
pUInt32[1] = pUInt32Val[1];
pUInt32[2] = pUInt32Val[2];
pUInt32[3] = pUInt32Val[3];
m_nPosition += sizeof(uint32)*4;
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
}
int MemStream::PutChar( int c ) {
if ( m_nPosition + 1 > m_nBufferSize ) {
GrowFile( m_nPosition + 1 );
}
unsigned char* bt = (unsigned char*)m_pBuffer + m_nPosition;
*bt = c;
m_nPosition++;
if ( m_nPosition > m_nFileSize ) {
m_nFileSize = m_nPosition;
}
return 1;
}
// only CMemFile supports "direct buffering" interaction with CArchive
UINT CMemFile::GetBufferPtr(UINT nCommand, UINT nCount,
void** ppBufStart, void**ppBufMax)
{
ASSERT(nCommand == bufferCheck || nCommand == bufferCommit ||
nCommand == bufferRead || nCommand == bufferWrite);
if (nCommand == bufferCheck)
return 1; // just a check for direct buffer support
if (nCommand == bufferCommit)
{
// commit buffer
ASSERT(ppBufStart == NULL);
ASSERT(ppBufMax == NULL);
m_nPosition += nCount;
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
return 0;
}
ASSERT(nCommand == bufferWrite || nCommand == bufferRead);
ASSERT(ppBufStart != NULL);
ASSERT(ppBufMax != NULL);
// when storing, grow file as necessary to satisfy buffer request
if (nCommand == bufferWrite && m_nPosition + nCount > m_nBufferSize)
GrowFile(m_nPosition + nCount);
// store buffer max and min
*ppBufStart = m_lpBuffer + m_nPosition;
// end of buffer depends on whether you are reading or writing
if (nCommand == bufferWrite)
*ppBufMax = m_lpBuffer + min(m_nBufferSize, m_nPosition + nCount);
else
{
if (nCount == (UINT)-1)
nCount = m_nBufferSize - m_nPosition;
*ppBufMax = m_lpBuffer + min(m_nFileSize, m_nPosition + nCount);
m_nPosition += LPBYTE(*ppBufMax) - LPBYTE(*ppBufStart);
}
// return number of bytes in returned buffer space (may be <= nCount)
return LPBYTE(*ppBufMax) - LPBYTE(*ppBufStart);
}
unsigned long MemStream::Write( const void* pBuf, unsigned long nCount ) {
if ( nCount == 0 ) {
return 0;
}
if ( m_nPosition + nCount > m_nBufferSize ) {
GrowFile( m_nPosition + nCount );
}
memcpy( (unsigned char*)m_pBuffer + m_nPosition, (unsigned char*)pBuf, nCount );
m_nPosition += nCount;
if ( m_nPosition > m_nFileSize ) {
m_nFileSize = m_nPosition;
}
return nCount;
}
void CMemFile::Write(const void* lpBuf, UINT nCount)
{
ASSERT_VALID(this);
if (nCount == 0)
return;
ASSERT(lpBuf != NULL);
ASSERT(AfxIsValidAddress(lpBuf, nCount, FALSE));
if (m_nPosition + nCount > m_nBufferSize)
GrowFile(m_nPosition + nCount);
ASSERT(m_nPosition + nCount <= m_nBufferSize);
Memcpy((BYTE*)m_lpBuffer + m_nPosition, (BYTE*)lpBuf, nCount);
m_nPosition += nCount;
if (m_nPosition > m_nFileSize)
m_nFileSize = m_nPosition;
ASSERT_VALID(this);
}
void CMemFile::SetLength( ULONGLONG dwNewLen )
/********************************************/
{
GrowFile( (SIZE_T)dwNewLen );
m_nFileSize = (SIZE_T)dwNewLen;
}
/***
Write bytes in a file from a given buffer.
Parameters:
- pvBuf: User buffer with data to write in file
- tsSize: Size of iten to write
- tsNumItens: Number of itens to write
Return:
Number of writtem itens in succes or E_NOTOPEN,
E_BUFFNULL or E_WRITE.
***/
size_t
C_File::Write( void FAR *pvBuf, size_t tsSize, size_t tsNumItens )
{
C_FileCritSect cCS0( this, CRITSECT0 );
size_t i = 0;
BOOL bContinue = TRUE;
#ifdef _USE_PRINTF_
Printf( "C_File: Estou em Write. (arq %s)", szFileName );
#endif
int iFlag = FALSE;
if( !pvBuf ){
return( (size_t) E_BUFFNULL );
}
if( (_bIs32s && iFile == -1) || (!_bIs32s && hFile == INVALID_HANDLE_VALUE) ){
if( ReOpen() != OK ){
if( !_xFile ){
return( 0 );
}
_xFile->PseudoClose();
ReOpen();
iFlag = TRUE;
}
}
LockStruct ls( this, CurPos(), (tsSize * tsNumItens) );
if( IsLocked( &ls ) ){
if( iFlag ){
PseudoClose();
_xFile->ReOpen();
}
#ifdef _USE_PRINTF_
Printf( "C_File: Write: IsLocked." );
#endif
return( (size_t) E_WRITE );
}
if( cCriptoOn ){
Encrypt( pvBuf, szKey, tsSize );
}
// MMF
BOOL bWriteHeader = FALSE;
if( !_bIs32s && hMMF ){
// preparar gravacao a partir do MMF
long lFSize = FileSize();
long lCPos = CurPos();
if( ( lCPos + (int) (tsNumItens * tsSize) ) > lFSize ){
// este write vai exceder os limites do arquivo. vamos aumentar-lo.
if( GrowFile( lCPos + (tsNumItens * tsSize) ) != OK ){
// nao foi possivel aumentar o arquivo.
bContinue = FALSE;
}
}
if( bContinue ){
if( (lCPos == iHeadInit) && (((int) tsSize) == iHeadSize) ){
bWriteHeader = TRUE;
// vamos fazer write no header do arquivo.
if( !pHeadView ){
// o header ainda nao esta' mapeado. vamos fazer isso.
CreateViewOfHead();
}
} else {
if( !pWinView ){
// o arquivo ainda nao esta' mapeado. vamos fazer isso.
CreateViewOfFile();
}
}
}
}
if( bContinue ){
for( i = 0; i < tsNumItens; i++ ){
if( _bIs32s ){
if( write( iFile, pvBuf, (unsigned) tsSize ) < (int) tsSize ){
break;
}
} else {
if( bWriteHeader ){
// gravar header no MMF.
memcpy( pHeadView, pvBuf, tsSize );
} else {
if( pWinView ){
// gravar no MMF.
int iNumBytes = ((iMMFWinSize * iPageSize) - iSeekWin) - (iHeadSize + 1);
memcpy( (void*) ((char*) PWINVIEW + iSeekWin), pvBuf, min( iNumBytes, ((int) tsSize) ) );
if( iNumBytes < ((int) tsSize) ){
// precisamos mapear outra janela e continuar a gravacao
++iWinNum; // proxima janela
CreateViewOfFile();
if( !pWinView ){
// mapeamento nao foi feito. fudeu.
break;
}
// gravacao do restante
memcpy( (void*) ((char*) PWINVIEW + iSeekWin), (void*) ((char*) pvBuf + iNumBytes), (tsSize - iNumBytes) );
iSeekWin += (tsSize - iNumBytes);
} else {
iSeekWin += tsSize;
}
} else {
DWORD dwWrittenBytes;
BOOL bResult = WriteFile( hFile, pvBuf, (unsigned) tsSize, &dwWrittenBytes, NULL );
if( !bResult || ( dwWrittenBytes < tsSize ) ){
DWORD dwErr = GetLastError();
break;
}
}
}
}
}
}
// if( ::GetTypeInt() == PE_REDE ){
// Flush();
// }
dwLastUse = GetTickCount();
if( cCriptoOn ){
Decrypt( pvBuf, szKey, tsSize );
}
if( i < tsNumItens ){
#ifdef _USE_PRINTF_
Printf( "C_File: Write: E_WRITE." );
#endif
i = (size_t) E_WRITE;
}
if( iFlag ){
PseudoClose();
_xFile->ReOpen();
}
#ifdef _USE_PRINTF_
Printf( "C_File: Write: Vou retornar %d.", i );
#endif
return( i );
}
