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debf33a962c37b34dc8f44fefe0913bbb3238289
harbour-core/src/rtl/filebuf.c
Przemysław Czerpak debf33a962 2015-11-13 14:03 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl) 
* src/rtl/filebuf.c
    * removed unused after last modification assignment
2015-11-13 14:03:45 +01:00

1620 lines
41 KiB
C
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/*
* Harbour Project source code:
* functions to access files with shared handles and locks
* (buffers in the future)
*
* Copyright 2008 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
* www - http://harbour-project.org
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING.txt. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
/* this has to be declared before hbapifs.h is included */
#define _HB_FILE_INTERNAL_
#if ! defined( _LARGEFILE64_SOURCE )
# define _LARGEFILE64_SOURCE 1
#endif
#include "hbapi.h"
#include "hbapifs.h"
#include "hbapierr.h"
#include "hbapiitm.h"
#include "hbthread.h"
#include "hbvm.h"
#include "directry.ch"
#if defined( HB_OS_UNIX )
# include <sys/types.h>
# include <sys/stat.h>
# include <unistd.h>
#endif
#if ! defined( HB_USE_LARGEFILE64 ) && defined( HB_OS_UNIX )
#if defined( __USE_LARGEFILE64 )
/*
* The macro: __USE_LARGEFILE64 is set when _LARGEFILE64_SOURCE is
* defined and effectively enables lseek64/flock64/ftruncate64 functions
* on 32bit machines.
*/
#define HB_USE_LARGEFILE64
#elif defined( HB_OS_UNIX ) && defined( O_LARGEFILE )
#define HB_USE_LARGEFILE64
#endif
#endif
#define HB_FLOCK_RESIZE 16
typedef struct
{
HB_FOFFSET start;
HB_FOFFSET len;
}
HB_FLOCK, * PHB_FLOCK;
typedef struct _HB_FILE
{
const HB_FILE_FUNCS * pFuncs;
HB_ULONG device;
HB_ULONG inode;
int used;
int mode;
HB_BOOL shared;
HB_FHANDLE hFile;
HB_FHANDLE hFileRO;
PHB_FLOCK pLocks;
HB_UINT uiLocks;
HB_UINT uiSize;
struct _HB_FILE * pNext;
struct _HB_FILE * pPrev;
}
HB_FILE;
static const HB_FILE_FUNCS * s_fileMethods( void );
#if defined( HB_OS_UNIX )
static PHB_FILE hb_fileposNew( PHB_FILE pFile );
#endif
static HB_CRITICAL_NEW( s_fileMtx );
static HB_CRITICAL_NEW( s_lockMtx );
static PHB_FILE s_openFiles = NULL;
#if 0
void hb_fileDsp( PHB_FILE pFile, const char * szMsg )
{
HB_UINT uiPos = 0;
fprintf( stderr, "\r\n[%s][", szMsg );
while( uiPos < pFile->uiLocks )
{
PHB_FLOCK pLock = &pFile->pLocks[ uiPos ];
fprintf( stderr, "%lld:%lld ", pLock->start, pLock->len );
++uiPos;
}
fprintf( stderr, "]" );
fflush(stderr);
}
#endif
static PHB_FILE hb_fileFind( HB_ULONG device, HB_ULONG inode )
{
if( s_openFiles && ( device || inode ) )
{
PHB_FILE pFile = s_openFiles;
do
{
if( pFile->device == device && pFile->inode == inode )
return pFile;
pFile = pFile->pNext;
}
while( s_openFiles != pFile );
}
return NULL;
}
static PHB_FILE hb_fileNew( HB_FHANDLE hFile, HB_BOOL fShared, int iMode,
HB_ULONG device, HB_ULONG inode, HB_BOOL fBind )
{
PHB_FILE pFile = hb_fileFind( device, inode );
if( ! pFile )
{
pFile = ( PHB_FILE ) hb_xgrabz( sizeof( HB_FILE ) );
pFile->pFuncs = s_fileMethods();
pFile->device = device;
pFile->inode = inode;
pFile->hFile = hFile;
pFile->hFileRO = FS_ERROR;
pFile->shared = fShared;
pFile->mode = iMode;
if( fBind )
{
if( s_openFiles )
{
pFile->pNext = s_openFiles;
pFile->pPrev = s_openFiles->pPrev;
pFile->pPrev->pNext = pFile;
s_openFiles->pPrev = pFile;
}
else
s_openFiles = pFile->pNext = pFile->pPrev = pFile;
}
}
pFile->used++;
return pFile;
}
static HB_UINT hb_fileFindOffset( PHB_FILE pFile, HB_FOFFSET nOffset )
{
HB_UINT uiFirst, uiLast, uiMiddle;
uiFirst = 0;
uiLast = pFile->uiLocks;
uiMiddle = uiLast >> 1;
while( uiFirst < uiLast )
{
HB_FOFFSET nEnd = pFile->pLocks[ uiMiddle ].start +
pFile->pLocks[ uiMiddle ].len;
if( nEnd > 0 && nEnd <= nOffset )
uiFirst = uiMiddle + 1;
else
uiLast = uiMiddle;
uiMiddle = ( uiFirst + uiLast ) >> 1;
}
return uiMiddle;
}
static void hb_fileInsertLock( PHB_FILE pFile, HB_UINT uiPos,
HB_FOFFSET nStart, HB_FOFFSET nLen )
{
if( pFile->uiLocks == pFile->uiSize )
{
pFile->uiSize += HB_FLOCK_RESIZE;
pFile->pLocks = ( PHB_FLOCK ) hb_xrealloc( pFile->pLocks,
sizeof( HB_FLOCK ) * pFile->uiSize );
memset( &pFile->pLocks[ pFile->uiLocks ], 0,
sizeof( HB_FLOCK ) * HB_FLOCK_RESIZE );
}
memmove( &pFile->pLocks[ uiPos + 1 ], &pFile->pLocks[ uiPos ],
( pFile->uiLocks - uiPos ) * sizeof( HB_FLOCK ) );
pFile->pLocks[ uiPos ].start = nStart;
pFile->pLocks[ uiPos ].len = nLen;
pFile->uiLocks++;
}
static void hb_fileDeleteLock( PHB_FILE pFile, HB_UINT uiPos )
{
pFile->uiLocks--;
memmove( &pFile->pLocks[ uiPos ], &pFile->pLocks[ uiPos + 1 ],
( pFile->uiLocks - uiPos ) * sizeof( HB_FLOCK ) );
if( pFile->uiSize - pFile->uiLocks >= ( HB_FLOCK_RESIZE << 1 ) )
{
pFile->uiSize -= HB_FLOCK_RESIZE;
pFile->pLocks = ( PHB_FLOCK ) hb_xrealloc( pFile->pLocks,
sizeof( HB_FLOCK ) * pFile->uiSize );
}
}
static HB_BOOL hb_fileSetLock( PHB_FILE pFile, HB_BOOL * pfLockFS,
HB_FOFFSET nStart, HB_FOFFSET nLen )
{
HB_BOOL fLJoin, fRJoin;
HB_UINT uiPos;
uiPos = hb_fileFindOffset( pFile, nStart );
fLJoin = fRJoin = HB_FALSE;
if( uiPos < pFile->uiLocks )
{
PHB_FLOCK pLock = &pFile->pLocks[ uiPos ];
HB_FOFFSET nEnd = nStart + nLen;
if( nEnd <= 0 || nEnd > pLock->start )
return HB_FALSE;
if( nEnd == pLock->start )
fRJoin = HB_TRUE;
}
if( uiPos > 0 )
{
PHB_FLOCK pLock = &pFile->pLocks[ uiPos - 1 ];
if( pLock->start + pLock->len == nStart )
fLJoin = HB_TRUE;
}
if( fLJoin )
{
if( fRJoin )
{
pFile->pLocks[ uiPos - 1 ].len += nLen + pFile->pLocks[ uiPos ].len;
hb_fileDeleteLock( pFile, uiPos );
}
else
pFile->pLocks[ uiPos - 1 ].len += nLen;
}
else if( fRJoin )
{
pFile->pLocks[ uiPos ].start -= nLen;
pFile->pLocks[ uiPos ].len += nLen;
}
else
hb_fileInsertLock( pFile, uiPos, nStart, nLen );
if( pFile->shared )
*pfLockFS = HB_TRUE;
return HB_TRUE;
}
static HB_BOOL hb_fileUnlock( PHB_FILE pFile, HB_BOOL * pfLockFS,
HB_FOFFSET nStart, HB_FOFFSET nLen )
{
HB_BOOL fResult = HB_FALSE;
HB_UINT uiPos;
uiPos = hb_fileFindOffset( pFile, nStart );
if( uiPos < pFile->uiLocks )
{
PHB_FLOCK pLock = &pFile->pLocks[ uiPos ];
if( nStart >= pLock->start && pLock->len >= nLen &&
nStart - pLock->start <= pLock->len - nLen )
{
if( pfLockFS && pFile->shared )
*pfLockFS = HB_TRUE;
else if( nStart == pLock->start )
{
if( nLen == pLock->len )
hb_fileDeleteLock( pFile, uiPos );
else
{
pLock->start += nLen;
pLock->len -= nLen;
}
}
else if( nStart + nLen == pLock->start + pLock->len )
pLock->len -= nLen;
else
{
hb_fileInsertLock( pFile, uiPos + 1, nStart + nLen,
pLock->start + pLock->len - nStart - nLen );
pLock = &pFile->pLocks[ uiPos ];
pLock->len = nStart - pLock->start;
}
fResult = HB_TRUE;
}
}
return fResult;
}
static HB_BOOL hb_fileTestLock( PHB_FILE pFile,
HB_FOFFSET nStart, HB_FOFFSET nLen )
{
HB_UINT uiPos;
uiPos = hb_fileFindOffset( pFile, nStart );
if( uiPos < pFile->uiLocks )
{
PHB_FLOCK pLock = &pFile->pLocks[ uiPos ];
HB_FOFFSET nEnd = nStart + nLen;
if( nEnd <= 0 || nEnd > pLock->start )
return HB_TRUE;
}
return HB_FALSE;
}
/*
* file methods
*/
static HB_BOOL s_fileAccept( PHB_FILE_FUNCS pFuncs, const char * pszFileName )
{
HB_SYMBOL_UNUSED( pFuncs );
return pszFileName && *pszFileName;
}
static HB_BOOL s_fileExists( PHB_FILE_FUNCS pFuncs, const char * pszFileName, char * pRetPath )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_spFileExists( pszFileName, pRetPath );
}
static HB_BOOL s_fileDelete( PHB_FILE_FUNCS pFuncs, const char * pszFileName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsDelete( pszFileName );
}
static HB_BOOL s_fileRename( PHB_FILE_FUNCS pFuncs, const char * pszName, const char * pszNewName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsRename( pszName, pszNewName );
}
static HB_BOOL s_fileCopy( PHB_FILE_FUNCS pFuncs, const char * pSrcFile, const char * pszDstFile )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsCopy( pSrcFile, pszDstFile );
}
static HB_BOOL s_fileDirExists( PHB_FILE_FUNCS pFuncs, const char * pszDirName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsDirExists( pszDirName );
}
static HB_BOOL s_fileDirMake( PHB_FILE_FUNCS pFuncs, const char * pszDirName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsMkDir( pszDirName );
}
static HB_BOOL s_fileDirRemove( PHB_FILE_FUNCS pFuncs, const char * pszDirName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsRmDir( pszDirName );
}
static double s_fileDirSpace( PHB_FILE_FUNCS pFuncs, const char * pszDirName, HB_USHORT uiType )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsDiskSpace( pszDirName, uiType );
}
static PHB_ITEM s_fileDirectory( PHB_FILE_FUNCS pFuncs, const char * pszDirSpec, const char * pszAttr )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsDirectory( pszDirSpec, pszAttr, HB_TRUE );
}
static HB_BOOL s_fileTimeGet( PHB_FILE_FUNCS pFuncs, const char * pszFileName, long * plJulian, long * plMillisec )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsGetFileTime( pszFileName, plJulian, plMillisec );
}
static HB_BOOL s_fileTimeSet( PHB_FILE_FUNCS pFuncs, const char * pszFileName, long lJulian, long lMillisec )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsSetFileTime( pszFileName, lJulian, lMillisec );
}
static HB_BOOL s_fileAttrGet( PHB_FILE_FUNCS pFuncs, const char * pszFileName, HB_FATTR * pnAttr )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsGetAttr( pszFileName, pnAttr );
}
static HB_BOOL s_fileAttrSet( PHB_FILE_FUNCS pFuncs, const char * pszFileName, HB_FATTR nAttr )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsSetAttr( pszFileName, nAttr );
}
static HB_BOOL s_fileLink( PHB_FILE_FUNCS pFuncs, const char * pszExisting, const char * pszNewName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsLink( pszExisting, pszNewName );
}
static HB_BOOL s_fileLinkSym( PHB_FILE_FUNCS pFuncs, const char * pszTarget, const char * pszNewName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsLinkSym( pszTarget, pszNewName );
}
static char * s_fileLinkRead( PHB_FILE_FUNCS pFuncs, const char * pszFileName )
{
HB_SYMBOL_UNUSED( pFuncs );
return hb_fsLinkRead( pszFileName );
}
static PHB_FILE s_fileExtOpen( PHB_FILE_FUNCS pFuncs, const char * pszFileName, const char * pDefExt,
HB_FATTR nExFlags, const char * pPaths,
PHB_ITEM pError )
{
PHB_FILE pFile = NULL;
#if defined( HB_OS_UNIX )
HB_BOOL fSeek = HB_FALSE;
# if defined( HB_USE_LARGEFILE64 )
struct stat64 statbuf;
# else
struct stat statbuf;
# endif
#endif
HB_BOOL fResult, fShared;
int iMode;
HB_FHANDLE hFile;
char * pszFile;
HB_SYMBOL_UNUSED( pFuncs );
fShared = ( nExFlags & ( FO_DENYREAD | FO_DENYWRITE | FO_EXCLUSIVE ) ) == 0;
iMode = ( int ) ( nExFlags & ( FO_READ | FO_WRITE | FO_READWRITE ) );
pszFile = hb_fsExtName( pszFileName, pDefExt, nExFlags, pPaths );
hb_vmUnlock();
#if ! defined( HB_OS_UNIX )
fResult = HB_TRUE;
#else
# if defined( HB_USE_SHARELOCKS ) && ! defined( HB_USE_BSDLOCKS )
if( nExFlags & FXO_SHARELOCK )
{
if( iMode == FO_WRITE && fShared )
{
if( access( ( char * ) pszFile, R_OK ) == 0 ||
access( ( char * ) pszFile, F_OK ) != 0 )
{
nExFlags = ( nExFlags ^ FO_WRITE ) | FO_READWRITE;
iMode = FO_READWRITE;
}
else
nExFlags ^= FXO_SHARELOCK;
}
else if( iMode == FO_READ && ! fShared )
{
nExFlags &= ~ ( HB_FATTR ) ( FO_DENYREAD | FO_DENYWRITE | FO_EXCLUSIVE );
fShared = HB_TRUE;
}
}
# endif
hb_threadEnterCriticalSection( &s_fileMtx );
# if defined( HB_USE_LARGEFILE64 )
fResult = stat64( ( char * ) pszFile, &statbuf ) == 0;
# else
fResult = stat( ( char * ) pszFile, &statbuf ) == 0;
# endif
hb_fsSetIOError( fResult, 0 );
if( fResult )
{
pFile = hb_fileFind( ( HB_ULONG ) statbuf.st_dev,
( HB_ULONG ) statbuf.st_ino );
if( pFile )
{
if( ! fShared || ! pFile->shared || ( nExFlags & FXO_TRUNCATE ) != 0 )
{
fResult = HB_FALSE;
pFile = NULL;
}
else if( pFile->mode != FO_READWRITE && pFile->mode != iMode )
{
iMode = FO_READWRITE;
pFile = NULL;
}
else
{
pFile->used++;
if( ( nExFlags & FXO_NOSEEKPOS ) == 0 )
{
# if defined( HB_OS_VXWORKS )
fSeek = ! S_ISFIFO( statbuf.st_mode );
# else
fSeek = ! S_ISFIFO( statbuf.st_mode ) && ! S_ISSOCK( statbuf.st_mode );
# endif
}
}
}
}
else
fResult = HB_TRUE;
if( fResult && pFile == NULL )
#endif /* HB_OS_UNIX */
{
hFile = hb_fsExtOpen( pszFileName, NULL,
nExFlags & ~ ( HB_FATTR ) ( FXO_DEFAULTS | FXO_COPYNAME ),
NULL, NULL );
if( hFile != FS_ERROR )
{
HB_ULONG device = 0, inode = 0;
#if ! defined( HB_OS_UNIX )
hb_threadEnterCriticalSection( &s_fileMtx );
#else
# if defined( HB_USE_LARGEFILE64 )
if( fstat64( hFile, &statbuf ) == 0 )
# else
if( fstat( hFile, &statbuf ) == 0 )
# endif
{
device = ( HB_ULONG ) statbuf.st_dev;
inode = ( HB_ULONG ) statbuf.st_ino;
if( ( nExFlags & FXO_NOSEEKPOS ) == 0 )
{
# if defined( HB_OS_VXWORKS )
fSeek = ! S_ISFIFO( statbuf.st_mode );
# else
fSeek = ! S_ISFIFO( statbuf.st_mode ) && ! S_ISSOCK( statbuf.st_mode );
# endif
}
}
#endif /* HB_OS_UNIX */
pFile = hb_fileNew( hFile, fShared, iMode, device, inode, HB_TRUE );
if( pFile->hFile != hFile )
{
if( pFile->mode != FO_READWRITE && iMode == FO_READWRITE )
{
HB_FHANDLE hTemp = pFile->hFileRO;
pFile->hFileRO = pFile->hFile;
pFile->hFile = hFile;
pFile->mode = iMode;
hFile = hTemp;
}
if( ! fShared || ! pFile->shared || pFile->mode != FO_READWRITE )
{
fResult = HB_FALSE;
if( pFile->hFileRO == FS_ERROR && pFile->uiLocks != 0 )
{
pFile->hFileRO = hFile;
hFile = FS_ERROR;
}
}
if( pFile->uiLocks == 0 )
{
#if ! defined( HB_USE_SHARELOCKS ) || defined( HB_USE_BSDLOCKS )
if( pFile->hFileRO != FS_ERROR )
{
hb_fsClose( pFile->hFileRO );
pFile->hFileRO = FS_ERROR;
}
#endif
if( hFile != FS_ERROR )
{
hb_fsClose( hFile );
hFile = FS_ERROR;
#if defined( HB_USE_SHARELOCKS ) && ! defined( HB_USE_BSDLOCKS )
/* TOFIX: possible race condition */
hb_fsLockLarge( pFile->hFile, HB_SHARELOCK_POS, HB_SHARELOCK_SIZE,
FL_LOCK | FLX_SHARED );
#endif
}
}
if( !fResult )
{
if( pFile )
{
--pFile->used;
pFile = NULL;
}
if( hFile != FS_ERROR )
{
/* TOFIX: possible race condition in MT mode,
* close() is not safe due to existing locks
* which are removed.
*/
hb_fsClose( hFile );
}
}
}
#if ! defined( HB_OS_UNIX )
hb_threadLeaveCriticalSection( &s_fileMtx );
#endif
}
}
#if defined( HB_OS_UNIX )
hb_threadLeaveCriticalSection( &s_fileMtx );
if( pFile && fSeek )
pFile = hb_fileposNew( pFile );
#endif
if( ! fResult )
hb_fsSetError( ( nExFlags & FXO_TRUNCATE ) ? 5 : 32 );
if( ( nExFlags & FXO_COPYNAME ) != 0 && pFile )
hb_strncpy( ( char * ) pszFileName, pszFile, HB_PATH_MAX - 1 );
if( pError )
{
hb_errPutFileName( pError, pszFile );
if( ! fResult )
{
hb_errPutOsCode( pError, hb_fsError() );
hb_errPutGenCode( pError, ( HB_ERRCODE ) ( ( nExFlags & FXO_TRUNCATE ) ? EG_CREATE : EG_OPEN ) );
}
}
hb_xfree( pszFile );
hb_vmLock();
return pFile;
}
static void s_fileClose( PHB_FILE pFile )
{
hb_vmUnlock();
hb_fsSetError( 0 );
hb_threadEnterCriticalSection( &s_fileMtx );
if( --pFile->used == 0 )
{
if( pFile->pNext )
{
pFile->pPrev->pNext = pFile->pNext;
pFile->pNext->pPrev = pFile->pPrev;
if( pFile == s_openFiles )
{
s_openFiles = pFile->pNext;
if( pFile == s_openFiles )
s_openFiles = NULL;
}
}
if( pFile->hFile != FS_ERROR )
hb_fsClose( pFile->hFile );
if( pFile->hFileRO != FS_ERROR )
hb_fsClose( pFile->hFileRO );
if( pFile->pLocks )
hb_xfree( pFile->pLocks );
hb_xfree( pFile );
}
hb_threadLeaveCriticalSection( &s_fileMtx );
hb_vmLock();
}
static HB_BOOL s_fileLock( PHB_FILE pFile, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
HB_BOOL fResult, fLockFS = HB_FALSE;
hb_vmUnlock();
if( ( iType & FL_MASK ) == FL_UNLOCK )
{
hb_threadEnterCriticalSection( &s_lockMtx );
fResult = hb_fileUnlock( pFile, &fLockFS, nStart, nLen );
hb_threadLeaveCriticalSection( &s_lockMtx );
if( fLockFS )
{
hb_fsLockLarge( pFile->hFile, nStart, nLen, ( HB_USHORT ) iType );
hb_threadEnterCriticalSection( &s_lockMtx );
hb_fileUnlock( pFile, NULL, nStart, nLen );
hb_threadLeaveCriticalSection( &s_lockMtx );
}
else
hb_fsSetError( fResult ? 0 : 33 );
}
else
{
hb_threadEnterCriticalSection( &s_lockMtx );
fResult = hb_fileSetLock( pFile, &fLockFS, nStart, nLen );
hb_threadLeaveCriticalSection( &s_lockMtx );
if( fLockFS )
{
#if defined( HB_OS_UNIX )
if( pFile->mode == FO_READ )
iType |= FLX_SHARED;
else if( pFile->mode == FO_WRITE )
iType &= ~FLX_SHARED;
#endif
fResult = hb_fsLockLarge( pFile->hFile, nStart, nLen, ( HB_USHORT ) iType );
if( ! fResult )
{
hb_threadEnterCriticalSection( &s_lockMtx );
hb_fileUnlock( pFile, NULL, nStart, nLen );
hb_threadLeaveCriticalSection( &s_lockMtx );
}
}
else
hb_fsSetError( fResult ? 0 : 33 );
}
hb_vmLock();
return fResult;
}
static int s_fileLockTest( PHB_FILE pFile, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
HB_BOOL fLocked;
int iResult;
hb_vmUnlock();
hb_threadEnterCriticalSection( &s_lockMtx );
fLocked = hb_fileTestLock( pFile, nStart, nLen );
hb_threadLeaveCriticalSection( &s_lockMtx );
if( fLocked )
{
#if defined( HB_OS_UNIX )
iResult = getpid();
#else
iResult = 1;
#endif
}
else
iResult = hb_fsLockTest( pFile->hFile, nStart, nLen, ( HB_USHORT ) iType );
hb_vmLock();
return iResult;
}
static HB_SIZE s_fileRead( PHB_FILE pFile, void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
HB_SYMBOL_UNUSED( nTimeout );
return hb_fsReadLarge( pFile->hFile, buffer, nSize );
}
static HB_SIZE s_fileWrite( PHB_FILE pFile, const void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
HB_SYMBOL_UNUSED( nTimeout );
return hb_fsWriteLarge( pFile->hFile, buffer, nSize );
}
static HB_SIZE s_fileReadAt( PHB_FILE pFile, void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return hb_fsReadAt( pFile->hFile, buffer, nSize, nOffset );
}
static HB_SIZE s_fileWriteAt( PHB_FILE pFile, const void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return hb_fsWriteAt( pFile->hFile, buffer, nSize, nOffset );
}
static HB_BOOL s_fileTruncAt( PHB_FILE pFile, HB_FOFFSET nOffset )
{
return hb_fsTruncAt( pFile->hFile, nOffset );
}
static HB_FOFFSET s_fileSeek( PHB_FILE pFile, HB_FOFFSET nOffset,
HB_USHORT uiFlags )
{
return hb_fsSeekLarge( pFile->hFile, nOffset, uiFlags );
}
static HB_FOFFSET s_fileSize( PHB_FILE pFile )
{
return hb_fsSeekLarge( pFile->hFile, 0, FS_END );
}
static HB_BOOL s_fileEof( PHB_FILE pFile )
{
return hb_fsEof( pFile->hFile );
}
static void s_fileFlush( PHB_FILE pFile, HB_BOOL fDirty )
{
HB_SYMBOL_UNUSED( pFile );
HB_SYMBOL_UNUSED( fDirty );
}
static void s_fileCommit( PHB_FILE pFile )
{
hb_fsCommit( pFile->hFile );
}
static HB_BOOL s_fileConfigure( PHB_FILE pFile, int iIndex, PHB_ITEM pValue )
{
HB_SYMBOL_UNUSED( pFile );
HB_SYMBOL_UNUSED( iIndex );
HB_SYMBOL_UNUSED( pValue );
return HB_FALSE;
}
static HB_FHANDLE s_fileHandle( PHB_FILE pFile )
{
return pFile ? pFile->hFile : FS_ERROR;
}
static const HB_FILE_FUNCS * s_fileMethods( void )
{
/* methods table */
static const HB_FILE_FUNCS s_fileFuncs =
{
s_fileAccept,
s_fileExists,
s_fileDelete,
s_fileRename,
s_fileCopy,
s_fileDirExists,
s_fileDirMake,
s_fileDirRemove,
s_fileDirSpace,
s_fileDirectory,
s_fileTimeGet,
s_fileTimeSet,
s_fileAttrGet,
s_fileAttrSet,
s_fileLink,
s_fileLinkSym,
s_fileLinkRead,
s_fileExtOpen,
s_fileClose,
s_fileLock,
s_fileLockTest,
s_fileRead,
s_fileWrite,
s_fileReadAt,
s_fileWriteAt,
s_fileTruncAt,
s_fileSeek,
s_fileSize,
s_fileEof,
s_fileFlush,
s_fileCommit,
s_fileConfigure,
s_fileHandle
};
return &s_fileFuncs;
}
#if defined( HB_OS_UNIX )
typedef struct
{
const HB_FILE_FUNCS * pFuncs;
PHB_FILE pFile;
HB_FOFFSET seek_pos;
}
HB_FILEPOS, * PHB_FILEPOS;
#define _PHB_FILEPOS ( ( PHB_FILEPOS ) pFilePos )
#define _PHB_FILE _PHB_FILEPOS->pFile
static void s_fileposClose( PHB_FILE pFilePos )
{
_PHB_FILE->pFuncs->Close( _PHB_FILE );
hb_xfree( pFilePos );
}
static HB_BOOL s_fileposLock( PHB_FILE pFilePos, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
return _PHB_FILE->pFuncs->Lock( _PHB_FILE, nStart, nLen, iType );
}
static int s_fileposLockTest( PHB_FILE pFilePos, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
return _PHB_FILE->pFuncs->LockTest( _PHB_FILE, nStart, nLen, iType );
}
static HB_SIZE s_fileposRead( PHB_FILE pFilePos, void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
HB_SIZE nDone;
HB_SYMBOL_UNUSED( nTimeout );
nDone = _PHB_FILE->pFuncs->ReadAt( _PHB_FILE, buffer, nSize, _PHB_FILEPOS->seek_pos );
_PHB_FILEPOS->seek_pos += nDone;
return nDone;
}
static HB_SIZE s_fileposWrite( PHB_FILE pFilePos, const void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
HB_SIZE nDone;
HB_SYMBOL_UNUSED( nTimeout );
nDone = _PHB_FILE->pFuncs->WriteAt( _PHB_FILE, buffer, nSize, _PHB_FILEPOS->seek_pos );
_PHB_FILEPOS->seek_pos += nDone;
return nDone;
}
static HB_SIZE s_fileposReadAt( PHB_FILE pFilePos, void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return _PHB_FILE->pFuncs->ReadAt( _PHB_FILE, buffer, nSize, nOffset );
}
static HB_SIZE s_fileposWriteAt( PHB_FILE pFilePos, const void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return _PHB_FILE->pFuncs->WriteAt( _PHB_FILE, buffer, nSize, nOffset );
}
static HB_BOOL s_fileposTruncAt( PHB_FILE pFilePos, HB_FOFFSET nOffset )
{
if( _PHB_FILE->pFuncs->TruncAt( _PHB_FILE, nOffset ) )
{
_PHB_FILEPOS->seek_pos = nOffset;
return HB_TRUE;
}
return HB_FALSE;
}
static HB_FOFFSET s_fileposSeek( PHB_FILE pFilePos, HB_FOFFSET nOffset,
HB_USHORT uiFlags )
{
if( uiFlags & FS_END )
nOffset += pFilePos->pFuncs->Size( pFilePos );
else if( uiFlags & FS_RELATIVE )
nOffset += _PHB_FILEPOS->seek_pos;
/* else FS_SET */
if( nOffset >= 0 )
{
_PHB_FILEPOS->seek_pos = nOffset;
hb_fsSetError( 0 );
}
else
hb_fsSetError( 25 ); /* 'Seek Error' */
return _PHB_FILEPOS->seek_pos;
}
static HB_FOFFSET s_fileposSize( PHB_FILE pFilePos )
{
return _PHB_FILE->pFuncs->Size( _PHB_FILE );
}
static HB_BOOL s_fileposEof( PHB_FILE pFilePos )
{
return _PHB_FILEPOS->seek_pos >= pFilePos->pFuncs->Size( pFilePos );
}
static void s_fileposFlush( PHB_FILE pFilePos, HB_BOOL fDirty )
{
_PHB_FILE->pFuncs->Flush( _PHB_FILE, fDirty );
}
static void s_fileposCommit( PHB_FILE pFilePos )
{
_PHB_FILE->pFuncs->Commit( _PHB_FILE );
}
static HB_FHANDLE s_fileposHandle( PHB_FILE pFilePos )
{
return pFilePos ? _PHB_FILE->pFuncs->Handle( _PHB_FILE ) : FS_ERROR;
}
static const HB_FILE_FUNCS * s_fileposMethods( void )
{
/* methods table */
static const HB_FILE_FUNCS s_fileFuncs =
{
s_fileAccept,
s_fileExists,
s_fileDelete,
s_fileRename,
s_fileCopy,
s_fileDirExists,
s_fileDirMake,
s_fileDirRemove,
s_fileDirSpace,
s_fileDirectory,
s_fileTimeGet,
s_fileTimeSet,
s_fileAttrGet,
s_fileAttrSet,
s_fileLink,
s_fileLinkSym,
s_fileLinkRead,
s_fileExtOpen,
s_fileposClose,
s_fileposLock,
s_fileposLockTest,
s_fileposRead,
s_fileposWrite,
s_fileposReadAt,
s_fileposWriteAt,
s_fileposTruncAt,
s_fileposSeek,
s_fileposSize,
s_fileposEof,
s_fileposFlush,
s_fileposCommit,
s_fileConfigure,
s_fileposHandle
};
return &s_fileFuncs;
}
static PHB_FILE hb_fileposNew( PHB_FILE pFile )
{
PHB_FILEPOS pFilePos = ( PHB_FILEPOS ) hb_xgrabz( sizeof( HB_FILEPOS ) );
pFilePos->pFuncs = s_fileposMethods();
pFilePos->pFile = pFile;
pFilePos->seek_pos = 0;
return ( PHB_FILE ) pFilePos;
}
#endif /* HB_OS_UNIX */
static const HB_FILE_FUNCS * s_pFileTypes[ HB_FILE_TYPE_MAX ];
static int s_iFileTypes = 0;
static int s_fileFindDrv( const char * pszFileName )
{
int i = -1;
if( pszFileName )
{
i = s_iFileTypes;
while( --i >= 0 )
{
if( s_pFileTypes[ i ]->Accept( s_pFileTypes[ i ], pszFileName ) )
break;
}
}
return i;
}
/*
* public API functions
*/
HB_BOOL hb_fileRegisterFull( const HB_FILE_FUNCS * pFuncs )
{
HB_BOOL fResult = HB_FALSE;
hb_vmUnlock();
hb_threadEnterCriticalSection( &s_lockMtx );
if( s_iFileTypes < HB_FILE_TYPE_MAX )
{
s_pFileTypes[ s_iFileTypes ] = pFuncs;
s_iFileTypes++;
fResult = HB_TRUE;
}
hb_threadLeaveCriticalSection( &s_lockMtx );
hb_vmLock();
return fResult;
}
HB_BOOL hb_fileExists( const char * pszFileName, char * pRetPath )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->Exists( s_pFileTypes[ i ], pszFileName, pRetPath );
return hb_spFileExists( pszFileName, pRetPath );
}
HB_BOOL hb_fileDelete( const char * pszFileName )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->Delete( s_pFileTypes[ i ], pszFileName );
return hb_fsDelete( pszFileName );
}
HB_BOOL hb_fileRename( const char * pszFileName, const char * pszNewName )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->Rename( s_pFileTypes[ i ], pszFileName, pszNewName );
return hb_fsRename( pszFileName, pszNewName );
}
HB_BOOL hb_fileCopy( const char * pSrcFile, const char * pszDstFile )
{
int i = s_fileFindDrv( pSrcFile );
if( i >= 0 )
return s_pFileTypes[ i ]->Copy( s_pFileTypes[ i ], pSrcFile, pszDstFile );
return hb_fsCopy( pSrcFile, pszDstFile );
}
HB_BOOL hb_fileDirExists( const char * pszDirName )
{
int i = s_fileFindDrv( pszDirName );
if( i >= 0 )
return s_pFileTypes[ i ]->DirExists( s_pFileTypes[ i ], pszDirName );
return hb_fsDirExists( pszDirName );
}
HB_BOOL hb_fileDirMake( const char * pszDirName )
{
int i = s_fileFindDrv( pszDirName );
if( i >= 0 )
return s_pFileTypes[ i ]->DirMake( s_pFileTypes[ i ], pszDirName );
return hb_fsMkDir( pszDirName );
}
HB_BOOL hb_fileDirRemove( const char * pszDirName )
{
int i = s_fileFindDrv( pszDirName );
if( i >= 0 )
return s_pFileTypes[ i ]->DirRemove( s_pFileTypes[ i ], pszDirName );
return hb_fsRmDir( pszDirName );
}
double hb_fileDirSpace( const char * pszDirName, HB_USHORT uiType )
{
int i = s_fileFindDrv( pszDirName );
if( i >= 0 )
return s_pFileTypes[ i ]->DirSpace( s_pFileTypes[ i ], pszDirName, uiType );
return hb_fsDiskSpace( pszDirName, uiType );
}
PHB_ITEM hb_fileDirectory( const char * pszDirSpec, const char * pszAttr )
{
int i = s_fileFindDrv( pszDirSpec );
if( i >= 0 )
return s_pFileTypes[ i ]->Directory( s_pFileTypes[ i ], pszDirSpec, pszAttr );
return hb_fsDirectory( pszDirSpec, pszAttr, HB_TRUE );
}
HB_BOOL hb_fileTimeGet( const char * pszFileName, long * plJulian, long * plMillisec )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->TimeGet( s_pFileTypes[ i ], pszFileName, plJulian, plMillisec );
return hb_fsGetFileTime( pszFileName, plJulian, plMillisec );
}
HB_BOOL hb_fileTimeSet( const char * pszFileName, long lJulian, long lMillisec )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->TimeSet( s_pFileTypes[ i ], pszFileName, lJulian, lMillisec );
return hb_fsSetFileTime( pszFileName, lJulian, lMillisec );
}
HB_FOFFSET hb_fileSizeGet( const char * pszFileName, HB_BOOL bUseDirEntry )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
{
HB_FOFFSET nSize = 0;
if( bUseDirEntry )
{
PHB_ITEM pDir = hb_fileDirectory( pszFileName, "HS" );
if( pDir )
{
PHB_ITEM pEntry = hb_arrayGetItemPtr( pDir, 1 );
if( pEntry )
nSize = hb_arrayGetNInt( pEntry, F_SIZE );
hb_itemRelease( pDir );
}
}
else
{
PHB_FILE pFile = hb_fileExtOpen( pszFileName, NULL, FO_READ | FO_COMPAT, NULL, NULL );
if( pFile )
{
HB_ERRCODE uiError;
nSize = hb_fileSize( pFile );
uiError = hb_fsError();
hb_fileClose( pFile );
hb_fsSetError( uiError );
}
}
return nSize;
}
return hb_fsFSize( pszFileName, bUseDirEntry );
}
HB_BOOL hb_fileAttrGet( const char * pszFileName, HB_FATTR * pulAttr )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->AttrGet( s_pFileTypes[ i ], pszFileName, pulAttr );
return hb_fsGetAttr( pszFileName, pulAttr );
}
HB_BOOL hb_fileAttrSet( const char * pszFileName, HB_FATTR ulAttr )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->AttrSet( s_pFileTypes[ i ], pszFileName, ulAttr );
return hb_fsSetAttr( pszFileName, ulAttr );
}
HB_BOOL hb_fileLink( const char * pszExisting, const char * pszNewName )
{
int i = s_fileFindDrv( pszExisting );
if( i >= 0 )
return s_pFileTypes[ i ]->Link( s_pFileTypes[ i ], pszExisting, pszNewName );
return hb_fsLink( pszExisting, pszNewName );
}
HB_BOOL hb_fileLinkSym( const char * pszTarget, const char * pszNewName )
{
int i = s_fileFindDrv( pszTarget );
if( i >= 0 )
return s_pFileTypes[ i ]->LinkSym( s_pFileTypes[ i ], pszTarget, pszNewName );
return hb_fsLinkSym( pszTarget, pszNewName );
}
char * hb_fileLinkRead( const char * pszFileName )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->LinkRead( s_pFileTypes[ i ], pszFileName );
return hb_fsLinkRead( pszFileName );
}
PHB_FILE hb_fileExtOpen( const char * pszFileName, const char * pDefExt,
HB_FATTR nExFlags, const char * pPaths,
PHB_ITEM pError )
{
int i = s_fileFindDrv( pszFileName );
if( i >= 0 )
return s_pFileTypes[ i ]->Open( s_pFileTypes[ i ], pszFileName, pDefExt, nExFlags, pPaths, pError );
return s_fileExtOpen( NULL, pszFileName, pDefExt, nExFlags, pPaths, pError );
}
void hb_fileClose( PHB_FILE pFile )
{
pFile->pFuncs->Close( pFile );
}
HB_BOOL hb_fileLock( PHB_FILE pFile, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
return pFile->pFuncs->Lock( pFile, nStart, nLen, iType );
}
int hb_fileLockTest( PHB_FILE pFile, HB_FOFFSET nStart, HB_FOFFSET nLen,
int iType )
{
return pFile->pFuncs->LockTest( pFile, nStart, nLen, iType );
}
HB_SIZE hb_fileRead( PHB_FILE pFile, void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
return pFile->pFuncs->Read( pFile, buffer, nSize, nTimeout );
}
HB_SIZE hb_fileWrite( PHB_FILE pFile, const void * buffer, HB_SIZE nSize,
HB_MAXINT nTimeout )
{
return pFile->pFuncs->Write( pFile, buffer, nSize, nTimeout );
}
HB_SIZE hb_fileReadAt( PHB_FILE pFile, void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return pFile->pFuncs->ReadAt( pFile, buffer, nSize, nOffset );
}
HB_SIZE hb_fileWriteAt( PHB_FILE pFile, const void * buffer, HB_SIZE nSize,
HB_FOFFSET nOffset )
{
return pFile->pFuncs->WriteAt( pFile, buffer, nSize, nOffset );
}
HB_BOOL hb_fileTruncAt( PHB_FILE pFile, HB_FOFFSET nOffset )
{
return pFile->pFuncs->TruncAt( pFile, nOffset );
}
HB_FOFFSET hb_fileSeek( PHB_FILE pFile, HB_FOFFSET nOffset, HB_USHORT uiFlags )
{
return pFile->pFuncs->Seek( pFile, nOffset, uiFlags );
}
HB_FOFFSET hb_fileSize( PHB_FILE pFile )
{
return pFile->pFuncs->Size( pFile );
}
HB_BOOL hb_fileEof( PHB_FILE pFile )
{
return pFile->pFuncs->Eof( pFile );
}
void hb_fileFlush( PHB_FILE pFile, HB_BOOL fDirty )
{
pFile->pFuncs->Flush( pFile, fDirty );
}
void hb_fileCommit( PHB_FILE pFile )
{
pFile->pFuncs->Commit( pFile );
}
HB_BOOL hb_fileConfigure( PHB_FILE pFile, int iIndex, PHB_ITEM pValue )
{
return pFile->pFuncs->Configure( pFile, iIndex, pValue );
}
HB_FHANDLE hb_fileHandle( PHB_FILE pFile )
{
return pFile->pFuncs->Handle( pFile );
}
/* internal FILE structures only */
PHB_FILE hb_fileCreateTemp( const char * pszDir, const char * pszPrefix,
HB_FATTR ulAttr, char * pszName )
{
PHB_FILE pFile = NULL;
HB_FHANDLE hFile;
hFile = hb_fsCreateTemp( pszDir, pszPrefix, ulAttr, pszName );
if( hFile != FS_ERROR )
pFile = hb_fileNew( hFile, HB_FALSE, HB_FALSE, 0, 0, HB_FALSE );
return pFile;
}
PHB_FILE hb_fileCreateTempEx( char * pszName,
const char * pszDir,
const char * pszPrefix,
const char * pszExt,
HB_FATTR ulAttr )
{
PHB_FILE pFile = NULL;
HB_FHANDLE hFile;
hFile = hb_fsCreateTempEx( pszName, pszDir, pszPrefix, pszExt, ulAttr );
if( hFile != FS_ERROR )
pFile = hb_fileNew( hFile, HB_FALSE, HB_FALSE, 0, 0, HB_FALSE );
return pFile;
}
PHB_FILE hb_fileFromHandle( HB_FHANDLE hFile )
{
return hb_fileNew( hFile, HB_FALSE, HB_FALSE, 0, 0, HB_FALSE );
}
HB_BOOL hb_fileDetach( PHB_FILE pFile )
{
if( pFile )
{
if( pFile->pFuncs == s_fileMethods() )
{
pFile->hFile = FS_ERROR;
s_fileClose( pFile );
return HB_TRUE;
}
#if defined( HB_OS_UNIX )
else if( pFile->pFuncs == s_fileposMethods() )
{
PHB_FILEPOS pFilePos = ( PHB_FILEPOS ) pFile;
pFilePos->pFile->hFile = FS_ERROR;
s_fileposClose( pFile );
return HB_TRUE;
}
#endif
}
return HB_FALSE;
}
HB_BOOL hb_fileIsLocal( PHB_FILE pFile )
{
if( pFile )
{
#if defined( HB_OS_UNIX )
if( pFile->pFuncs == s_fileMethods() ||
pFile->pFuncs == s_fileposMethods() )
#else
if( pFile->pFuncs == s_fileMethods() )
#endif
return HB_TRUE;
}
return HB_FALSE;
}
HB_BOOL hb_fileIsLocalName( const char * pszFileName )
{
return s_fileFindDrv( pszFileName ) < 0;
}
PHB_FILE hb_filePOpen( const char * pszFileName, const char * pszMode )
{
PHB_FILE pFile = NULL;
HB_FHANDLE hFile;
hFile = hb_fsPOpen( pszFileName, pszMode );
if( hFile != FS_ERROR )
pFile = hb_fileNew( hFile, HB_FALSE, HB_FALSE, 0, 0, HB_FALSE );
return pFile;
}
HB_SIZE hb_fileResult( HB_SIZE nSize )
{
return nSize == ( HB_SIZE ) FS_ERROR ? 0 : nSize;
}
#define HB_FILELOAD_BUFFERSIZE 65536
HB_BYTE * hb_fileLoadData( PHB_FILE pFile, HB_SIZE nMaxSize,
HB_SIZE * pnSize )
{
HB_BYTE * pFileBuf = NULL;
HB_SIZE nSize = 0, nRead, nBufSize;
HB_FOFFSET nFileSize = hb_fileSize( pFile );
if( nFileSize == FS_ERROR ||
( nFileSize == 0 && hb_fsError() == HB_FILE_ERR_UNSUPPORTED ) )
{
for( nBufSize = 0;; )
{
if( nBufSize == nSize )
{
nBufSize += nBufSize == 0 ? HB_FILELOAD_BUFFERSIZE : nBufSize >> 1;
if( nMaxSize > 0 && nBufSize > nMaxSize )
{
nBufSize = nMaxSize;
if( nBufSize == nSize )
break;
}
pFileBuf = ( HB_BYTE * ) hb_xrealloc( pFileBuf, nBufSize );
}
nRead = hb_fileRead( pFile, pFileBuf + nSize, nBufSize - nSize, -1 );
if( nRead == 0 || nRead == ( HB_SIZE ) FS_ERROR )
break;
nSize += nRead;
}
}
else if( nFileSize > 0 )
{
nBufSize = ( HB_SIZE ) nFileSize;
if( nMaxSize > 0 && nBufSize > nMaxSize )
nBufSize = nMaxSize;
pFileBuf = ( HB_BYTE * ) hb_xgrab( nBufSize + 1 );
do
{
nRead = hb_fileReadAt( pFile, pFileBuf + nSize, nBufSize - nSize, nSize );
if( nRead == 0 || nRead == ( HB_SIZE ) FS_ERROR )
break;
nSize += nRead;
}
while( nSize < nBufSize );
}
if( nSize > 0 )
{
pFileBuf = ( HB_BYTE * ) hb_xrealloc( pFileBuf, nSize + 1 );
pFileBuf[ nSize ] = '\0';
}
else if( pFileBuf )
{
hb_xfree( pFileBuf );
pFileBuf = NULL;
}
if( pnSize )
*pnSize = nSize;
return pFileBuf;
}
HB_BYTE * hb_fileLoad( const char * pszFileName, HB_SIZE nMaxSize,
HB_SIZE * pnSize )
{
HB_BYTE * pFileBuf = NULL;
PHB_FILE pFile = hb_fileExtOpen( pszFileName, NULL,
FO_READ | FO_SHARED | FO_PRIVATE |
FXO_SHARELOCK | FXO_NOSEEKPOS,
NULL, NULL );
if( pFile != NULL )
{
pFileBuf = hb_fileLoadData( pFile, nMaxSize, pnSize );
hb_fileClose( pFile );
}
else if( pnSize )
*pnSize = 0;
return pFileBuf;
}
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