/* deletes xxx bytes from the current file, beginning at the current record */
static int _del_buff( PFT_TEXT ft_text, HB_ISIZ iLen )
{
char * WriteBuff = ( char * ) hb_xgrab( BUFFSIZE );
HB_FOFFSET fpRead, fpWrite;
HB_ISIZ WriteLen;
/* initialize file pointers */
fpWrite = ft_text->offset[ ft_text->area ];
fpRead = ft_text->offset[ ft_text->area ] + iLen;
/* do initial load of buffer */
WriteLen = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], WriteBuff, BUFFSIZE, fpRead ) );
fpRead += WriteLen;
ft_text->error[ ft_text->area ] = 0;
while( WriteLen > 0 )
{
HB_ISIZ SaveLen;
/* position to beginning of write area */
SaveLen = hb_fileResult( hb_fileWriteAt( ft_text->handles[ ft_text->area ], WriteBuff, WriteLen, fpWrite ) );
/* move write pointer */
fpWrite += SaveLen;
if( SaveLen != WriteLen )
{
/* error, fetch errcode and quit */
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
/* return to read area and read another buffer */
WriteLen = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], WriteBuff, BUFFSIZE, fpRead ) );
fpRead += WriteLen;
}
/* store length in bytes, set legacy EOF marker */
ft_text->lastbyte[ ft_text->area ] = hb_fileSeek( ft_text->handles[ ft_text->area ], fpWrite, FS_SET );
hb_fileWrite( ft_text->handles[ ft_text->area ], WriteBuff, 0, -1 );
/* clear last_rec so next gobot will recount the records */
ft_text->last_rec[ ft_text->area ] = 0;
hb_fileSeek( ft_text->handles[ ft_text->area ], ft_text->offset[ ft_text->area ], FS_SET );
hb_xfree( WriteBuff );
return ft_text->error[ ft_text->area ];
}
static HB_ERRCODE hb_sdfReadRecord( SDFAREAP pArea )
{
HB_USHORT uiRead, uiToRead, uiEolPos;
HB_TRACE( HB_TR_DEBUG, ( "hb_sdfReadRecord(%p)", pArea ) );
uiToRead = pArea->uiRecordLen + pArea->uiEolLen + 2;
uiRead = ( HB_USHORT ) hb_fileReadAt( pArea->pFile, pArea->pRecord, uiToRead,
pArea->nRecordOffset );
if( uiRead > 0 && uiRead < uiToRead && pArea->pRecord[ uiRead - 1 ] == '\032' )
--uiRead;
if( uiRead == 0 )
{
pArea->area.fEof = HB_TRUE;
pArea->fPositioned = HB_FALSE;
hb_sdfClearRecordBuffer( pArea );
}
else
{
pArea->area.fEof = HB_FALSE;
pArea->fPositioned = HB_TRUE;
uiEolPos = ( HB_USHORT ) hb_strAt( pArea->szEol, pArea->uiEolLen,
( const char * ) pArea->pRecord,
uiRead );
if( uiEolPos )
{
--uiEolPos;
if( uiRead < uiToRead && uiRead == uiEolPos + pArea->uiEolLen )
pArea->nNextOffset = ( HB_FOFFSET ) -1;
else
pArea->nNextOffset = pArea->nRecordOffset + uiEolPos + pArea->uiEolLen;
if( uiEolPos < pArea->uiRecordLen )
memset( pArea->pRecord + uiEolPos, ' ', pArea->uiRecordLen - uiEolPos );
}
else
{
if( uiRead < uiToRead )
pArea->nNextOffset = ( HB_FOFFSET ) -1;
else
pArea->nNextOffset = 0;
if( uiRead < pArea->uiRecordLen )
memset( pArea->pRecord + uiRead, ' ', pArea->uiRecordLen - uiRead );
}
if( uiEolPos != pArea->uiRecordLen )
memcpy( pArea->pRecord + pArea->uiRecordLen,
pArea->szEol, pArea->uiEolLen );
}
return HB_SUCCESS;
}
static PHRB_BODY hb_hrbLoadFromFile( const char * szHrb, HB_USHORT usMode )
{
PHRB_BODY pHrbBody = NULL;
PHB_ITEM pError = NULL;
PHB_FILE pFile;
/* Open as binary */
do
{
pFile = hb_fileExtOpen( szHrb,
hb_stackSetStruct()->HB_SET_DEFEXTENSIONS ? ".hrb" : NULL,
FO_READ | FXO_SHARELOCK, NULL, pError );
if( pFile == NULL )
{
pError = hb_errRT_FileError( pError, NULL, EG_OPEN, 6102, szHrb );
if( hb_errLaunch( pError ) != E_RETRY )
break;
}
}
while( pFile == NULL );
if( pError )
hb_itemRelease( pError );
if( pFile != NULL )
{
HB_SIZE nBodySize = ( HB_SIZE ) hb_fileSize( pFile );
if( nBodySize )
{
char * pbyBuffer;
pbyBuffer = ( char * ) hb_xgrab( nBodySize + sizeof( char ) + 1 );
hb_fileReadAt( pFile, pbyBuffer, nBodySize, 0 );
pbyBuffer[ nBodySize ] = '\0';
pHrbBody = hb_hrbLoad( ( const char * ) pbyBuffer, nBodySize, usMode, szHrb );
hb_xfree( pbyBuffer );
}
hb_fileClose( pFile );
}
return pHrbBody;
}
static void hb_memoread( HB_BOOL bHandleEOF )
{
const char * pszFileName = hb_parc( 1 );
if( pszFileName )
{
PHB_FILE pFile = hb_fileExtOpen( pszFileName, NULL,
FO_READ | FO_SHARED | FO_PRIVATE |
FXO_SHARELOCK | FXO_NOSEEKPOS,
NULL, NULL );
if( pFile != NULL )
{
HB_SIZE nSize = ( HB_SIZE ) hb_fileSize( pFile );
if( nSize != 0 )
{
char * pbyBuffer = ( char * ) hb_xgrab( nSize + 1 );
nSize = hb_fileReadAt( pFile, pbyBuffer, nSize, 0 );
/* Don't read the file terminating EOF character */
if( bHandleEOF && nSize > 0 )
{
if( pbyBuffer[ nSize - 1 ] == HB_CHAR_EOF )
--nSize;
}
hb_retclen_buffer( pbyBuffer, nSize );
}
else
hb_retc_null();
hb_fileClose( pFile );
}
else
hb_retc_null();
}
else
hb_retc_null();
}
static int hb_delimNextChar( DELIMAREAP pArea )
{
if( pArea->ulBufferIndex + pArea->uiEolLen >= pArea->ulBufferRead &&
( pArea->ulBufferRead == 0 ||
pArea->ulBufferRead >= pArea->ulBufferSize - 1 ) )
{
ULONG ulLeft = pArea->ulBufferRead - pArea->ulBufferIndex;
if( ulLeft )
memcpy( pArea->pBuffer,
pArea->pBuffer + pArea->ulBufferIndex, ulLeft );
pArea->ulBufferStart += pArea->ulBufferIndex;
pArea->ulBufferIndex = 0;
pArea->ulBufferRead = hb_fileReadAt( pArea->pFile,
pArea->pBuffer + ulLeft,
pArea->ulBufferSize - ulLeft,
pArea->ulBufferStart + ulLeft );
if( pArea->ulBufferRead > 0 &&
pArea->pBuffer[ pArea->ulBufferRead + ulLeft - 1 ] == '\032' )
pArea->ulBufferRead--;
pArea->ulBufferRead += ulLeft;
}
if( pArea->ulBufferIndex + pArea->uiEolLen <= pArea->ulBufferRead &&
memcmp( pArea->pBuffer + pArea->ulBufferIndex,
pArea->szEol, pArea->uiEolLen ) == 0 )
{
pArea->ulBufferIndex += pArea->uiEolLen;
pArea->ulNextOffset = pArea->ulBufferStart + pArea->ulBufferIndex;
return -1;
}
else if( pArea->ulBufferIndex < pArea->ulBufferRead )
{
return pArea->pBuffer[ pArea->ulBufferIndex++ ];
}
pArea->ulNextOffset = ( HB_FOFFSET ) -1;
return -2;
}
/* internal routine to do buffer skips. Passing a positive value performs
a downward skip, a negative number does an upward skip. Passing 0
skips to the end of file.
Returns a long indicating the number of records skipped */
static long _ft_skip( long iRecs )
{
PFT_TEXT ft_text = ( PFT_TEXT ) hb_stackGetTSD( &s_ft_text );
HB_ISIZ iByteCount;
HB_ISIZ iBytesRead, iBytesRemaining;
char * cPtr;
long iSkipped = 0;
char * cBuff = ( char * ) hb_xgrab( BUFFSIZE );
HB_FOFFSET fpOffset = ft_text->offset[ ft_text->area ];
ft_text->isBof[ ft_text->area ] = HB_FALSE;
ft_text->isEof[ ft_text->area ] = HB_FALSE;
ft_text->error[ ft_text->area ] = 0;
/* iRecs is zero if they want to find the EOF, start a top of file */
if( iRecs == 0 )
{
fpOffset = 0;
ft_text->recno[ ft_text->area ] = 1;
}
if( iRecs >= 0 )
{
do
{
cPtr = cBuff;
/* read a chunk */
if( ( iBytesRead = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], cBuff, BUFFSIZE, fpOffset ) ) ) == 0 )
{
/* buffer is empty thus EOF, set vars and quit */
ft_text->isEof[ ft_text->area ] = HB_TRUE;
ft_text->last_rec[ ft_text->area ] = ft_text->recno[ ft_text->area ];
ft_text->last_off[ ft_text->area ] = ft_text->offset[ ft_text->area ];
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
iBytesRemaining = iBytesRead;
/* parse the buffer while there's still stuff in it */
do
{
/* get count of chars in this line */
iByteCount = _findeol( cPtr, iBytesRemaining, NULL );
if( iByteCount > 0 && iByteCount != iBytesRemaining )
{
/* found an EOL, iByteCount points to first char of next record */
iBytesRemaining -= iByteCount;
fpOffset += iByteCount;
cPtr += iByteCount;
ft_text->offset[ ft_text->area ] = fpOffset;
ft_text->recno[ ft_text->area ]++;
iSkipped++;
if( iRecs && ( iSkipped == iRecs ) )
iBytesRemaining = iBytesRead = 0;
}
else
{
/* no more EOLs in this buffer, or EOL is last chars in the buffer */
/* check for EOF */
if( iBytesRead != BUFFSIZE )
{
/* buffer was not full, thus EOF, set vars and quit */
iBytesRemaining = 0;
ft_text->last_rec[ ft_text->area ] = ft_text->recno[ ft_text->area ];
ft_text->last_off[ ft_text->area ] = ft_text->offset[ ft_text->area ];
if( iRecs )
ft_text->isEof[ ft_text->area ] = HB_TRUE;
}
else
{
/* buffer was full, so probably not EOF, but maybe EOL straddled end
of buffer, so back up pointer a bit before doing the next read */
fpOffset = hb_fileSeek( ft_text->handles[ ft_text->area ], 0, FS_RELATIVE ) - 1;
iBytesRemaining = 0;
}
}
}
while( iBytesRemaining > 0 );
}
while( iBytesRead == BUFFSIZE );
}
else
{
/* skip backwards */
iRecs = -iRecs;
if( ft_text->recno[ ft_text->area ] > iRecs )
{
do
{
/* calc offset to read area of file ahead of current pointer */
fpOffset = HB_MAX( ft_text->offset[ ft_text->area ] - BUFFSIZE, 0 );
/* read a chunk */
if( ( iBytesRead = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], cBuff, BUFFSIZE, fpOffset ) ) ) == 0 )
{
/* buffer is empty thus file is zero len, set vars and quit */
ft_text->isBof[ ft_text->area ] = HB_TRUE;
ft_text->isEof[ ft_text->area ] = HB_TRUE;
ft_text->recno[ ft_text->area ] = 0;
ft_text->offset[ ft_text->area ] = 0;
ft_text->last_rec[ ft_text->area ] = 0;
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
/* set pointer within buffer */
iBytesRemaining = ( int ) ( ft_text->offset[ ft_text->area ] - fpOffset );
cPtr = cBuff + iBytesRemaining;
/* parse the buffer while there's still stuff in it */
do
{
/* get count of chars in this line */
iByteCount = _findbol( cPtr, iBytesRemaining );
if( iByteCount > 0 )
{
/* found an EOL, iByteCount points to first char of next
record */
iBytesRemaining -= iByteCount;
ft_text->offset[ ft_text->area ] -= iByteCount;
cPtr -= iByteCount;
fpOffset = ft_text->offset[ ft_text->area ];
ft_text->recno[ ft_text->area ]--;
iSkipped++;
if( iSkipped == iRecs )
iBytesRemaining = iBytesRead = 0;
}
else
{
/* no more EOLs in this buffer so we're either at
BOF or record crosses buffer boundary */
/* check for BOF */
if( iBytesRead != BUFFSIZE )
{
/* buffer was not full, thus BOF, set vars and quit */
iBytesRemaining = 0;
ft_text->offset[ ft_text->area ] = 0;
ft_text->recno[ ft_text->area ] = 1;
ft_text->isBof[ ft_text->area ] = HB_TRUE;
}
else
{
/* buffer was full, so not BOF */
iBytesRemaining = 0;
}
}
}
while( iBytesRemaining > 0 );
}
while( fpOffset > 0 && iBytesRead == BUFFSIZE );
}
else
{
ft_text->offset[ ft_text->area ] = 0;
ft_text->recno[ ft_text->area ] = 1;
ft_text->isBof[ ft_text->area ] = HB_TRUE;
}
}
hb_xfree( cBuff );
return iSkipped;
}
/* the contents of the inserted bytes are indeterminate, i.e. you'll have to
write to them before they mean anything */
static int _ins_buff( PFT_TEXT ft_text, HB_ISIZ iLen )
{
char * ReadBuff = ( char * ) hb_xgrab( BUFFSIZE );
char * WriteBuff = ( char * ) hb_xgrab( BUFFSIZE );
char * SaveBuff;
HB_FOFFSET fpRead, fpWrite;
HB_ISIZ WriteLen, ReadLen;
HB_ISIZ SaveLen;
HB_ISIZ iLenRemaining = iLen;
/* set target move distance, this allows iLen to be greater than BUFFSIZE */
iLen = HB_MIN( iLenRemaining, BUFFSIZE );
iLenRemaining -= iLen;
/* initialize file pointers */
fpRead = ft_text->offset[ ft_text->area ];
fpWrite = ft_text->offset[ ft_text->area ] + iLen;
/* do initial load of both buffers */
WriteLen = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], WriteBuff, BUFFSIZE, fpRead ) );
fpRead += WriteLen;
ReadLen = hb_fileResult( hb_fileRead( ft_text->handles[ ft_text->area ], ReadBuff, BUFFSIZE, -1 ) );
fpRead += ReadLen;
ft_text->error[ ft_text->area ] = 0;
while( ! ft_text->error[ ft_text->area ] && iLen > 0 )
{
while( WriteLen > 0 )
{
/* position to beginning of write area */
if( hb_fileSeek( ft_text->handles[ ft_text->area ], fpWrite, FS_SET ) != fpWrite )
{
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
if( ( SaveLen = hb_fileResult( hb_fileWrite( ft_text->handles[ ft_text->area ], WriteBuff, WriteLen, -1 ) ) ) == 0 )
{
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
/* move write pointer */
fpWrite += SaveLen;
if( SaveLen != WriteLen )
{
/* error, fetch errcode and quit */
ft_text->error[ ft_text->area ] = hb_fsError();
break;
}
#if 0
WriteLen = SaveLen;
#endif
/* swap buffers */
SaveBuff = WriteBuff;
WriteBuff = ReadBuff;
ReadBuff = SaveBuff;
WriteLen = ReadLen;
/* return to read area and read another buffer */
ReadLen = hb_fileResult( hb_fileReadAt( ft_text->handles[ ft_text->area ], ReadBuff, BUFFSIZE, fpRead ) );
fpRead += ReadLen;
}
iLen = HB_MIN( iLenRemaining, BUFFSIZE );
iLenRemaining -= iLen;
}
/* store length in bytes, set legacy EOF marker */
ft_text->lastbyte[ ft_text->area ] = hb_fileSeek( ft_text->handles[ ft_text->area ], fpWrite, FS_SET );
hb_fileWrite( ft_text->handles[ ft_text->area ], WriteBuff, 0, -1 );
/* clear last_rec so next gobot will recount the records */
ft_text->last_rec[ ft_text->area ] = 0;
hb_fileSeek( ft_text->handles[ ft_text->area ], ft_text->offset[ ft_text->area ], FS_SET );
hb_xfree( ReadBuff );
hb_xfree( WriteBuff );
return ft_text->error[ ft_text->area ];
}
static HB_ERRCODE hb_sdfNextRecord( SDFAREAP pArea )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_sdfNextRecord(%p)", pArea ) );
if( ! pArea->fPositioned )
pArea->nNextOffset = ( HB_FOFFSET ) -1;
else
{
if( pArea->nNextOffset == 0 )
{
HB_USHORT uiRead, uiToRead, uiEolPos, uiRest = 0;
HB_FOFFSET ulOffset = pArea->nRecordOffset;
uiToRead = pArea->uiRecordLen + pArea->uiEolLen + 2;
do
{
uiRead = ( HB_USHORT ) hb_fileReadAt( pArea->pFile, pArea->pRecord + uiRest,
uiToRead - uiRest, ulOffset + uiRest ) + uiRest;
if( uiRead > 0 && uiRead < uiToRead &&
pArea->pRecord[ uiRead - 1 ] == '\032' )
--uiRead;
uiEolPos = ( HB_USHORT ) hb_strAt( pArea->szEol, pArea->uiEolLen,
( const char * ) pArea->pRecord,
uiRead );
if( uiEolPos )
{
--uiEolPos;
if( uiRead < uiToRead && uiRead == uiEolPos + pArea->uiEolLen )
pArea->nNextOffset = ( HB_FOFFSET ) -1;
else
pArea->nNextOffset = ulOffset + uiEolPos + pArea->uiEolLen;
}
else if( uiRead < uiToRead )
{
pArea->nNextOffset = ( HB_FOFFSET ) -1;
}
else
{
if( pArea->uiEolLen > 1 )
{
uiRest = pArea->uiEolLen - 1;
memcpy( pArea->pRecord, pArea->pRecord + uiRead - uiRest, uiRest );
}
ulOffset += uiRead - uiRest;
}
}
while( pArea->nNextOffset == 0 );
}
pArea->ulRecNo++;
}
if( pArea->nNextOffset == ( HB_FOFFSET ) -1 )
{
pArea->area.fEof = HB_TRUE;
pArea->fPositioned = HB_FALSE;
hb_sdfClearRecordBuffer( pArea );
return HB_SUCCESS;
}
pArea->nRecordOffset = pArea->nNextOffset;
return hb_sdfReadRecord( pArea );
}
