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harbour-core/harbour/source/rtl/filesys.c

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/*
* $Id$
*/
/*
* Harbour Project source code:
* The FileSys API (C level)
*
* Copyright 1999 {list of individual authors and e-mail addresses}
* www - http://www.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. 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.
*
*/
/*
* The following parts are Copyright of the individual authors.
* www - http://www.harbour-project.org
*
* Copyright 1999-2001 Viktor Szakats <viktor.szakats@syenar.hu>
* hb_fsSetError()
* hb_fsSetDevMode()
* hb_fsReadLarge()
* hb_fsWriteLarge()
* hb_fsCurDirBuff()
*
* Copyright 1999 Jose Lalin <dezac@corevia.com>
* hb_fsChDrv()
* hb_fsCurDrv()
* hb_fsIsDrv()
* hb_fsIsDevice()
*
* Copyright 2000 Luiz Rafael Culik <culik@sl.conex.net>
* and David G. Holm <dholm@jsd-llc.com>
* hb_fsEof()
*
* Copyright 2001 Jose Gimenez (JFG) <jfgimenez@wanadoo.es>
* <tecnico.sireinsa@ctv.es>
* Added __WIN32__ check for any compiler to use the Win32
* API calls to allow openning an unlimited number of files
* simultaneously.
*
* See doc/license.txt for licensing terms.
*
*/
/* NOTE: In DOS/DJGPP under WinNT4 hb_fsSeek( fhnd, offset < 0, FS_SET) will
set the file pointer to the passed negative value, and the subsequent
hb_fsWrite() call will fail. In CA-Clipper hb_fsSeek() will fail,
the pointer will not be moved, and thus the hb_fsWrite() call will
successfully write the buffer to the current file position. [vszakats]
This has been corrected by ptucker
*/
#include <ctype.h>
#include "hbapi.h"
#include "hbapifs.h"
#include "hb_io.h"
#if defined(__GNUC__) && !defined(__MINGW32__)
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#if defined(__CYGWIN__)
#include <io.h>
#endif
#if defined(__DJGPP__)
#include <dir.h>
#define _getdrive getdisk
#define _chdrive setdisk
#endif
#if !defined(HAVE_POSIX_IO)
#define HAVE_POSIX_IO
#endif
extern int rename( const char *, const char * );
#endif
#if defined(__WATCOMC__)
#include <sys/stat.h>
#include <share.h>
#include <fcntl.h>
#include <direct.h>
#include <errno.h>
#include <dos.h>
#if !defined(HAVE_POSIX_IO)
#define HAVE_POSIX_IO
#endif
#define ftruncate chsize
#endif
#if defined(__BORLANDC__) || defined(__IBMCPP__) || defined(_MSC_VER) || defined(__MINGW32__)
#include <sys\stat.h>
#include <share.h>
#include <fcntl.h>
#include <direct.h>
#if defined(__BORLANDC__)
#include <dir.h>
#include <dos.h>
#include <windows.h>
#endif
#if defined(_MSC_VER) || defined(__MINGW32__)
#include <sys\locking.h>
#define ftruncate _chsize
#else
#define ftruncate chsize
#if !defined(HAVE_POSIX_IO)
#define HAVE_POSIX_IO
#endif
#endif
#include <errno.h>
#endif
#if defined(__MPW__)
#include <fcntl.h>
#endif
#if defined(HB_OS_DOS)
#include <dos.h>
#endif
#ifndef O_BINARY
#define O_BINARY 0 /* O_BINARY not defined on Linux */
#endif
#ifndef S_IEXEC
#define S_IEXEC 0x0040 /* owner may execute <directory search> */
#endif
#ifndef S_IRWXU
#define S_IRWXU 0x01C0 /* RWE permissions mask for owner */
#endif
#ifndef S_IRUSR
#define S_IRUSR 0x0100 /* owner may read */
#endif
#ifndef S_IWUSR
#define S_IWUSR 0x0080 /* owner may write */
#endif
#ifndef S_IXUSR
#define S_IXUSR 0x0040 /* owner may execute <directory search> */
#endif
#ifndef SH_COMPAT
#define SH_COMPAT 0x00 /* Compatibility */
#endif
#ifndef SH_DENYRW
#define SH_DENYRW 0x10 /* Deny read/write */
#endif
#ifndef SH_DENYWR
#define SH_DENYWR 0x20 /* Deny write */
#endif
#ifndef SH_DENYRD
#define SH_DENYRD 0x30 /* Deny read */
#endif
#ifndef SH_DENYNO
#define SH_DENYNO 0x40 /* Deny nothing */
#endif
static USHORT s_uiErrorLast = 0;
#if defined(HAVE_POSIX_IO) || defined(_MSC_VER) || defined(__MINGW32__)
/* Only compilers with Posix or Posix-like I/O support are supported */
#define HB_FS_FILE_IO
#endif
#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__IBMCPP__) || defined(__WATCOMC__)
/* These compilers use sopen() rather than open(), because their
versions of open() do not support combined O_ and SH_ flags */
#define HB_FS_SOPEN
#endif
#if ( defined(HAVE_POSIX_IO) && ( defined(HB_OS_OS2) || defined(HB_OS_DOS) || defined(_Windows) || defined(_WIN32) ) && ! defined(__CYGWIN__) ) || defined(__MINGW32__)
/* These platforms and/or compilers have common drive letter support */
#define HB_FS_DRIVE_LETTER
#endif
#if UINT_MAX == ULONG_MAX
#define HB_FS_LARGE_OPTIMIZED
#else
#define LARGE_MAX ( UINT_MAX - 1L )
#endif
/* Convert HARBOUR flags to IO subsystem flags */
#if defined(HB_FS_FILE_IO)
static int convert_open_flags( USHORT uiFlags )
{
/* by default FO_READ + FO_COMPAT is set */
int result_flags = 0;
HB_TRACE(HB_TR_DEBUG, ("convert_open_flags(%hu)", uiFlags));
result_flags |= O_BINARY;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added O_BINARY\n"));
#if defined(HB_FS_SOPEN)
if( ( uiFlags & ( FO_WRITE | FO_READWRITE ) ) == FO_READ )
{
result_flags |= O_RDONLY;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added O_RDONLY\n"));
}
#else
if( ( uiFlags & ( FO_WRITE | FO_READWRITE ) ) == FO_READ )
{
result_flags |= ( O_RDONLY | SH_COMPAT );
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added O_RDONLY SH_COMPAT\n"));
}
#endif
/* read & write flags */
if( uiFlags & FO_WRITE )
{
result_flags |= O_WRONLY;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added O_WRONLY\n"));
}
if( uiFlags & FO_READWRITE )
{
result_flags |= O_RDWR;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added O_RDWR\n"));
}
#if ! defined(HB_FS_SOPEN)
/* shared flags */
if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
{
result_flags |= SH_DENYRD;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added SH_DENYRD\n"));
}
else if( uiFlags & FO_EXCLUSIVE )
{
result_flags |= SH_DENYRW;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added SH_DENYRW\n"));
}
else if( uiFlags & FO_DENYWRITE )
{
result_flags |= SH_DENYWR;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added SH_DENYWR\n"));
}
if( uiFlags & FO_DENYNONE )
{
result_flags |= SH_DENYNO;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added SH_DENYNO\n"));
}
if( uiFlags & FO_SHARED )
{
result_flags |= SH_DENYNO;
HB_TRACE(HB_TR_INFO, ("convert_open_flags: added SH_DENYNO\n"));
}
#endif
HB_TRACE(HB_TR_INFO, ("convert_open_flags: result is 0x%04x\n", result_flags));
return result_flags;
}
static int convert_seek_flags( USHORT uiFlags )
{
/* by default FS_SET is set */
int result_flags = SEEK_SET;
HB_TRACE(HB_TR_DEBUG, ("convert_seek_flags(%hu)", uiFlags));
if( uiFlags & FS_RELATIVE )
result_flags = SEEK_CUR;
if( uiFlags & FS_END )
result_flags = SEEK_END;
return result_flags;
}
static void convert_create_flags( USHORT uiFlags, int * result_flags, unsigned * result_pmode )
{
HB_TRACE(HB_TR_DEBUG, ("convert_create_flags(%hu, %p, %p)", uiFlags, result_flags, result_pmode));
/* by default FC_NORMAL is set */
*result_flags = O_BINARY | O_CREAT | O_TRUNC | O_RDWR;
*result_pmode = S_IRUSR | S_IWUSR;
if( uiFlags & FC_READONLY )
{
*result_pmode = S_IRUSR;
HB_TRACE(HB_TR_INFO, ("convert_create_flags: S_IRUSR"));
}
if( uiFlags & FC_HIDDEN )
*result_flags |= 0;
if( uiFlags & FC_SYSTEM )
*result_flags |= 0;
HB_TRACE(HB_TR_INFO, ("convert_create_flags: 0x%04x, 0x%04x\n", *result_flags, *result_pmode));
}
#endif
/*
* FILESYS.API FUNCTIONS --
*/
FHANDLE hb_fsOpen( BYTE * pFilename, USHORT uiFlags )
{
FHANDLE hFileHandle;
HB_TRACE(HB_TR_DEBUG, ("hb_fsOpen(%p, %hu)", pFilename, uiFlags));
#if defined(X__WIN32__)
{
DWORD dwFlags = 0;
DWORD dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE;
HANDLE hFile;
/* read & write flags */
if( uiFlags & FO_WRITE )
dwFlags |= GENERIC_WRITE;
if( uiFlags & FO_READWRITE )
dwFlags |= GENERIC_READ;
/* shared flags */
if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
dwShare = FILE_SHARE_WRITE;
else if( uiFlags & FO_DENYWRITE )
dwShare = FILE_SHARE_READ;
else if( uiFlags & FO_EXCLUSIVE )
dwShare = 0;
errno = 0;
hFile = ( HANDLE ) CreateFile( ( char * ) pFilename, dwFlags,
dwShare, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
if( hFile == ( HANDLE ) INVALID_HANDLE_VALUE )
errno = GetLastError();
hFileHandle=(int)hFile;
s_uiErrorLast = errno;
}
#elif defined(HAVE_POSIX_IO) && ! defined(__IBMCPP__)
errno = 0;
hFileHandle = open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
s_uiErrorLast = errno;
#elif defined(_MSC_VER)
{
int iShare = _SH_DENYNO;
if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
iShare = _SH_DENYRD;
else if( uiFlags & FO_EXCLUSIVE )
iShare = _SH_DENYRW;
else if( uiFlags & FO_DENYWRITE )
iShare = _SH_DENYWR;
errno = 0;
if( iShare )
hFileHandle = _sopen( ( char * ) pFilename, convert_open_flags( uiFlags ), iShare );
else
hFileHandle = _open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
s_uiErrorLast = errno;
}
#elif defined(__MINGW32__) || defined(__IBMCPP__)
{
int iShare = SH_DENYNO;
if( ( uiFlags & FO_DENYREAD ) == FO_DENYREAD )
iShare = SH_DENYRD;
else if( uiFlags & FO_EXCLUSIVE )
iShare = SH_DENYRW;
else if( uiFlags & FO_DENYWRITE )
iShare = SH_DENYWR;
errno = 0;
if( iShare )
hFileHandle = sopen( ( char * ) pFilename, convert_open_flags( uiFlags ), iShare );
else
hFileHandle = open( ( char * ) pFilename, convert_open_flags( uiFlags ) );
s_uiErrorLast = errno;
}
#else
hFileHandle = FS_ERROR;
s_uiErrorLast = FS_ERROR;
#endif
return hFileHandle;
}
FHANDLE hb_fsCreate( BYTE * pFilename, USHORT uiAttr )
{
FHANDLE hFileHandle;
int oflag;
unsigned pmode;
HB_TRACE(HB_TR_DEBUG, ("hb_fsCreate(%p, %hu)", pFilename, uiAttr));
s_uiErrorLast = 0;
#if defined(X__WIN32__)
{
DWORD dwFlags = FILE_ATTRIBUTE_ARCHIVE;
HANDLE hFile;
if( uiAttr & FC_READONLY )
dwFlags |= FILE_ATTRIBUTE_READONLY;
if( uiAttr & FC_HIDDEN )
dwFlags |= FILE_ATTRIBUTE_HIDDEN;
if( uiAttr & FC_SYSTEM )
dwFlags |= FILE_ATTRIBUTE_SYSTEM;
errno = 0;
hFile = ( HANDLE ) CreateFile( ( char * ) pFilename,
GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
dwFlags, NULL );
if( hFile == ( FHANDLE ) INVALID_HANDLE_VALUE )
errno = GetLastError();
hFileHandle=(int)hFile;
s_uiErrorLast = errno;
}
#elif defined(HB_FS_FILE_IO)
errno = 0;
convert_create_flags( uiAttr, &oflag, &pmode );
hFileHandle = open( ( char * ) pFilename, oflag, pmode );
if( hFileHandle == -1 )
{
/* This if block is required, because errno will be set
if the file did not exist and had to be created, even
when the create is successful! */
s_uiErrorLast = errno;
}
#else
hFileHandle = FS_ERROR;
s_uiErrorLast = FS_ERROR;
#endif
return hFileHandle;
}
/* Derived from hb_fsCreate()
NOTE: The default opening mode differs from the one used in hb_fsCreate()
[vszakats]
*/
FHANDLE hb_fsCreateEx( BYTE * pFilename, USHORT uiAttr, USHORT uiFlags )
{
FHANDLE hFileHandle;
int oflag;
unsigned pmode;
HB_TRACE(HB_TR_DEBUG, ("hb_fsCreateEx(%p, %hu, %hu)", pFilename, uiAttr, uiFlags));
s_uiErrorLast = 0;
#if defined(HB_FS_FILE_IO)
errno = 0;
convert_create_flags( uiAttr, &oflag, &pmode );
hFileHandle = open( ( char * ) pFilename, convert_open_flags( uiFlags ), pmode );
if( hFileHandle == -1 )
{
/* This if block is required, because errno will be set
if the file did not exist and had to be created, even
when the create is successful! */
s_uiErrorLast = errno;
}
#else
hFileHandle = FS_ERROR;
s_uiErrorLast = FS_ERROR;
#endif
return hFileHandle;
}
void hb_fsClose( FHANDLE hFileHandle )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsClose(%p)", hFileHandle));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
CloseHandle( ( HANDLE ) hFileHandle );
#else
close( hFileHandle );
#endif
s_uiErrorLast = errno;
#else
s_uiErrorLast = FS_ERROR;
#endif
/* Convert 'Invalid Memory Block' to 'Invalid Handle' */
if( s_uiErrorLast == 9 )
s_uiErrorLast = 6;
}
void hb_fsSetDevMode( FHANDLE hFileHandle, USHORT uiDevMode )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsSetDevMode(%p, %hu)", hFileHandle, uiDevMode));
#if defined(__BORLANDC__) || defined(__IBMCPP__) || defined(__DJGPP__) || defined(__CYGWIN__) || defined(__WATCOMC__)
errno = 0;
switch( uiDevMode )
{
case FD_BINARY:
setmode( hFileHandle, O_BINARY );
break;
case FD_TEXT:
setmode( hFileHandle, O_TEXT );
break;
}
s_uiErrorLast = errno;
#elif defined(_MSC_VER) || defined(__MINGW32__)
errno = 0;
switch( uiDevMode )
{
case FD_BINARY:
_setmode( hFileHandle, _O_BINARY );
break;
case FD_TEXT:
_setmode( hFileHandle, _O_TEXT );
break;
}
s_uiErrorLast = errno;
#else
s_uiErrorLast = FS_ERROR;
#endif
}
void hb_fsSetDevRaw( FHANDLE hFileHandle )
{
hb_fsSetDevMode( hFileHandle, FD_BINARY );
}
void hb_fsSetDevText( FHANDLE hFileHandle )
{
hb_fsSetDevMode( hFileHandle, FD_TEXT );
}
USHORT hb_fsRead( FHANDLE hFileHandle, BYTE * pBuff, USHORT uiCount )
{
USHORT uiRead;
HB_TRACE(HB_TR_DEBUG, ("hb_fsRead(%p, %p, %hu)", hFileHandle, pBuff, uiCount));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
{
DWORD dwRead = 0;
BOOL bError;
bError=ReadFile( ( HANDLE ) hFileHandle, pBuff, uiCount, &dwRead, NULL );
if (!bError)
errno = GetLastError();
uiRead = ( USHORT ) dwRead;
}
#else
uiRead = read( hFileHandle, pBuff, uiCount );
#endif
s_uiErrorLast = errno;
if( uiRead == ( USHORT ) -1 )
uiRead = 0;
#else
uiRead = 0;
s_uiErrorLast = FS_ERROR;
#endif
return uiRead;
}
USHORT hb_fsWrite( FHANDLE hFileHandle, BYTE * pBuff, USHORT uiCount )
{
USHORT uiWritten;
HB_TRACE(HB_TR_DEBUG, ("hb_fsWrite(%p, %p, %hu)", hFileHandle, pBuff, uiCount));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
{
DWORD dwWritten = 0;
BOOL bError;
bError=WriteFile( ( HANDLE ) hFileHandle, pBuff, uiCount, &dwWritten, NULL );
if (!bError)
errno = GetLastError();
uiWritten = ( USHORT ) dwWritten;
}
#else
if( uiCount )
{
uiWritten = write( hFileHandle, pBuff, uiCount );
if( uiWritten == ( USHORT ) -1 )
uiWritten = 0;
}
else
{
uiWritten = 0;
ftruncate( hFileHandle, lseek( hFileHandle, 0L, SEEK_CUR ) );
}
s_uiErrorLast = errno;
#endif
#else
uiWritten = 0;
s_uiErrorLast = FS_ERROR;
#endif
return uiWritten;
}
ULONG hb_fsReadLarge( FHANDLE hFileHandle, BYTE * pBuff, ULONG ulCount )
{
ULONG ulRead;
HB_TRACE(HB_TR_DEBUG, ("hb_fsReadLarge(%p, %p, %lu)", hFileHandle, pBuff, ulCount));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
{
BOOL bError;
bError=ReadFile( ( HANDLE ) hFileHandle, pBuff, ulCount, &ulRead, NULL );
if (!bError)
errno = GetLastError();
}
#elif defined(HB_FS_LARGE_OPTIMIZED)
ulRead = read( hFileHandle, pBuff, ulCount );
#else
{
ULONG ulLeftToRead = ulCount;
USHORT uiToRead;
USHORT uiRead;
BYTE * pPtr = pBuff;
ulRead = 0;
while( ulLeftToRead )
{
/* Determine how much to read this time */
if( ulLeftToRead > ( ULONG ) INT_MAX )
{
uiToRead = INT_MAX;
ulLeftToRead -= ( ULONG ) uiToRead;
}
else
{
uiToRead = ( USHORT ) ulLeftToRead;
ulLeftToRead = 0;
}
uiRead = read( hFileHandle, pPtr, uiToRead );
/* -1 on bad hFileHandle
0 on disk full
*/
if( uiRead == ( USHORT ) -1 || uiRead == 0 )
break;
ulRead += ( ULONG ) uiRead;
pPtr += uiRead;
}
}
#endif
s_uiErrorLast = errno;
#else
ulRead = 0;
s_uiErrorLast = FS_ERROR;
#endif
return ulRead;
}
ULONG hb_fsWriteLarge( FHANDLE hFileHandle, BYTE * pBuff, ULONG ulCount )
{
ULONG ulWritten;
HB_TRACE(HB_TR_DEBUG, ("hb_fsWriteLarge(%p, %p, %lu)", hFileHandle, pBuff, ulCount));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
{
BOOL bError;
bError=WriteFile( ( HANDLE ) hFileHandle, pBuff, ulCount, &ulWritten, NULL );
if (!bError)
errno = GetLastError();
}
#else
if( ulCount )
#if defined(HB_FS_LARGE_OPTIMIZED)
ulWritten = write( hFileHandle, pBuff, ulCount );
#else
{
ULONG ulLeftToWrite = ulCount;
USHORT uiToWrite;
USHORT uiWritten;
BYTE * pPtr = pBuff;
ulWritten = 0;
while( ulLeftToWrite )
{
/* Determine how much to write this time */
if( ulLeftToWrite > ( ULONG ) INT_MAX )
{
uiToWrite = INT_MAX;
ulLeftToWrite -= ( ULONG ) uiToWrite;
}
else
{
uiToWrite = ( USHORT ) ulLeftToWrite;
ulLeftToWrite = 0;
}
uiWritten = write( hFileHandle, pPtr, uiToWrite );
/* -1 on bad hFileHandle
0 on disk full
*/
if( uiWritten == ( USHORT ) -1 || uiWritten == 0 )
break;
ulWritten += ( ULONG ) uiWritten;
pPtr += uiWritten;
}
}
#endif
else
{
ulWritten = 0;
ftruncate( hFileHandle, lseek( hFileHandle, 0L, SEEK_CUR ) );
}
#endif
s_uiErrorLast = errno;
#else
ulWritten = 0;
s_uiErrorLast = FS_ERROR;
#endif
return ulWritten;
}
ULONG hb_fsSeek( FHANDLE hFileHandle, LONG lOffset, USHORT uiFlags )
{
ULONG ulPos;
USHORT Flags;
HB_TRACE(HB_TR_DEBUG, ("hb_fsSeek(%p, %ld, %hu)", hFileHandle, lOffset, uiFlags));
Flags = convert_seek_flags( uiFlags );
if( lOffset < 0 && Flags == SEEK_SET )
{
#if defined(HB_OS_OS2)
{
APIRET ret = DosSetFilePtr( hFileHandle, 0, SEEK_CUR, &ulPos );
if( ret != 0 )
{
ulPos = 0;
s_uiErrorLast = ( USHORT ) ret;
}
}
#elif defined(HB_FS_FILE_IO)
/* get current offset */
errno = 0;
#if defined(X__WIN32__)
ulPos = SetFilePointer( ( HANDLE ) hFileHandle, 0, NULL, FILE_CURRENT );
if ((DWORD)ulPos = (DWORD)-1)
errno=GetLastError();
#else
ulPos = lseek( hFileHandle, 0, SEEK_CUR );
#endif
if( errno != 0 )
{
ulPos = 0;
s_uiErrorLast = errno;
}
else
s_uiErrorLast = 25; /* 'Seek Error' */
#else
ulPos = 0;
s_uiErrorLast = 25; /* 'Seek Error' */
#endif
}
else
{
#if defined(HB_OS_OS2)
{
APIRET ret = DosSetFilePtr( hFileHandle, lOffset, Flags, &ulPos );
if( ret != 0 )
{
ulPos = 0;
s_uiErrorLast = ( USHORT ) ret;
}
}
#elif defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
ulPos = SetFilePointer( ( HANDLE ) hFileHandle, lOffset, NULL, (DWORD)Flags );
if ((DWORD)ulPos = (DWORD)-1)
errno=GetLastError();
#else
ulPos = lseek( hFileHandle, lOffset, Flags );
#endif
if( errno != 0 )
ulPos = 0;
s_uiErrorLast = errno;
#else
ulPos = 0;
s_uiErrorLast = FS_ERROR;
#endif
/* Convert 'Unknown Command' to 'Seek Error' */
if( s_uiErrorLast == 22 )
s_uiErrorLast = 25;
}
return ulPos;
}
ULONG hb_fsTell( FHANDLE hFileHandle )
{
ULONG ulPos;
HB_TRACE(HB_TR_DEBUG, ("hb_fsTell(%p)", hFileHandle));
#if defined(HB_FS_FILE_IO)
errno = 0;
#if defined(X__WIN32__)
ulPos = SetFilePointer( ( HANDLE ) hFileHandle, 0, NULL, FILE_CURRENT );
if ((DWORD)ulPos = (DWORD)-1)
errno=GetLastError();
#else
ulPos = lseek( hFileHandle, 0L, SEEK_CUR );
#endif
s_uiErrorLast = errno;
#else
ulPos = 0;
s_uiErrorLast = FS_ERROR;
#endif
return ulPos;
}
USHORT hb_fsError( void )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsError()"));
return s_uiErrorLast;
}
void hb_fsSetError( USHORT uiError )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsSetError(%hu)", uiError));
s_uiErrorLast = uiError;
}
int hb_fsDelete( BYTE * pFilename )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsDelete(%s)", (char*) pFilename));
#if defined(HAVE_POSIX_IO)
errno = 0;
iResult = unlink( ( char * ) pFilename );
s_uiErrorLast = errno;
#elif defined(_MSC_VER) || defined(__MINGW32__)
errno = 0;
iResult = remove( ( char * ) pFilename );
s_uiErrorLast = errno;
#else
iResult = -1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult;
}
int hb_fsRename( BYTE * pOldName, BYTE * pNewName )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsRename(%s, %s)", (char*) pOldName, (char*) pNewName));
#if defined(HB_FS_FILE_IO)
errno = 0;
iResult = rename( ( char * ) pOldName, ( char * ) pNewName );
s_uiErrorLast = errno;
#else
iResult = -1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult;
}
BOOL hb_fsLock ( FHANDLE hFileHandle, ULONG ulStart,
ULONG ulLength, USHORT uiMode )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsLock(%p, %lu, %lu, %hu)", hFileHandle, ulStart, ulLength, uiMode));
#if defined(HB_OS_OS2)
{
struct _FILELOCK fl, ful;
errno = 0;
switch( uiMode )
{
case FL_LOCK:
fl.lOffset = ulStart;
fl.lRange = ulLength;
ful.lOffset = 0;
ful.lRange = 0;
/* lock region, 2 seconds timeout, exclusive access - no atomic */
iResult = ( int ) DosSetFileLocks( hFileHandle, &ful, &fl, 2000L, 0L );
break;
case FL_UNLOCK:
fl.lOffset = 0;
fl.lRange = 0;
ful.lOffset = ulStart;
ful.lRange = ulLength;
/* unlock region, 2 seconds timeout, exclusive access - no atomic */
iResult = ( int ) DosSetFileLocks( hFileHandle, &ful, &fl, 2000L, 0L );
break;
default:
iResult = 0;
}
s_uiErrorLast = errno;
}
#elif defined(_MSC_VER)
{
ULONG ulOldPos = hb_fsSeek( hFileHandle, ulStart, FS_SET );
errno = 0;
switch( uiMode )
{
case FL_LOCK:
iResult = locking( hFileHandle, _LK_LOCK, ulLength );
break;
case FL_UNLOCK:
iResult = locking( hFileHandle, _LK_UNLCK, ulLength );
break;
default:
iResult = 0;
}
s_uiErrorLast = errno;
hb_fsSeek( hFileHandle, ulOldPos, FS_SET );
}
#elif defined(__MINGW32__)
{
ULONG ulOldPos = hb_fsSeek( hFileHandle, ulStart, FS_SET );
errno = 0;
switch( uiMode )
{
case FL_LOCK:
iResult = _locking( hFileHandle, _LK_LOCK, ulLength );
break;
case FL_UNLOCK:
iResult = _locking( hFileHandle, _LK_UNLOCK, ulLength );
break;
default:
iResult = 0;
}
s_uiErrorLast = errno;
hb_fsSeek( hFileHandle, ulOldPos, FS_SET );
}
#elif defined(__GNUC__) && defined(HB_OS_UNIX)
{
/* TODO: check for append locks (SEEK_END)
*/
struct flock lock_info;
errno = 0;
switch( uiMode )
{
case FL_LOCK:
{
lock_info.l_type = F_WRLCK;
lock_info.l_start = ulStart;
lock_info.l_len = ulLength;
lock_info.l_whence = SEEK_SET; /* start from the beginning of the file */
lock_info.l_pid = getpid();
iResult = fcntl( hFileHandle, F_SETLK, &lock_info );
if( iResult < 0 )
iResult = 1; /* lock failed */
else
iResult = 0; /* lock was successful */
}
break;
case FL_UNLOCK:
{
lock_info.l_type = F_UNLCK; /* unlock */
lock_info.l_start = ulStart;
lock_info.l_len = ulLength;
lock_info.l_whence = SEEK_SET;
lock_info.l_pid = getpid();
iResult = fcntl( hFileHandle, F_SETLK, &lock_info );
if( iResult < 0 )
iResult = 0; /* lock failed */
}
break;
default:
iResult = 0;
}
s_uiErrorLast = errno;
}
#elif defined(HAVE_POSIX_IO) && !defined(__IBMCPP__) && ( !defined(__GNUC__) || defined(__DJGPP__) )
errno = 0;
switch( uiMode )
{
case FL_LOCK:
iResult = lock( hFileHandle, ulStart, ulLength );
break;
case FL_UNLOCK:
iResult = unlock( hFileHandle, ulStart, ulLength );
break;
default:
iResult = 0;
}
s_uiErrorLast = errno;
#else
iResult = 1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult == 0;
}
void hb_fsCommit( FHANDLE hFileHandle )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsCommit(%p)", hFileHandle));
#if defined(__WATCOMC__)
_dos_commit( hFileHandle );
#elif defined(HB_FS_FILE_IO) && !defined(HB_OS_OS2) && !defined(HB_OS_UNIX)
{
int dup_handle;
errno = 0;
dup_handle = dup( hFileHandle );
if( dup_handle != -1 )
close( dup_handle );
s_uiErrorLast = errno;
}
#elif defined(HB_OS_OS2)
{
errno = 0;
/* TODO: what about error code from DosResetBuffer() call? */
DosResetBuffer( hFileHandle );
s_uiErrorLast = errno;
}
#elif defined(HB_OS_UNIX)
/* NOTE: close() functions releases all lock regardles if it is an
* original or duplicated file handle
*/
#if defined(_POSIX_SYNCHRONIZED_IO)
/* faster - flushes data buffers only, without updating directory info
*/
s_uiErrorLast = ( fdatasync( hFileHandle ) < -1 ) ? FS_ERROR : 0;
#else
/* slower - flushes all file data buffers and i-node info
*/
s_uiErrorLast = ( fsync( hFileHandle ) < -1 ) ? FS_ERROR : 0;
#endif
#else
s_uiErrorLast = FS_ERROR;
#endif
}
BOOL hb_fsMkDir( BYTE * pDirname )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsMkDir(%s)", (char*) pDirname));
#if defined(HAVE_POSIX_IO) || defined(__MINGW32__)
errno = 0;
#if !defined(__WATCOMC__) && !defined(__BORLANDC__) && !defined(__IBMCPP__) && !defined(__MINGW32__)
iResult = mkdir( ( char * ) pDirname, S_IWUSR | S_IRUSR | S_IXUSR );
#else
iResult = mkdir( ( char * ) pDirname );
#endif
s_uiErrorLast = errno;
#else
iResult = 1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult == 0;
}
BOOL hb_fsChDir( BYTE * pDirname )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsChDir(%s)", (char*) pDirname));
#if defined(HAVE_POSIX_IO) || defined(__MINGW32__)
errno = 0;
iResult = chdir( ( char * ) pDirname );
s_uiErrorLast = errno;
#else
iResult = 1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult == 0;
}
BOOL hb_fsRmDir( BYTE * pDirname )
{
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsRmDir(%s)", (char*) pDirname));
#if defined(HAVE_POSIX_IO) || defined(__MINGW32__)
errno = 0;
iResult = rmdir( ( char * ) pDirname );
s_uiErrorLast = errno;
#else
iResult = 1;
s_uiErrorLast = FS_ERROR;
#endif
return iResult == 0;
}
/* NOTE: This is not thread safe function, it's there for compatibility. */
/* NOTE: 0 = current drive, 1 = A, 2 = B, 3 = C, etc. */
BYTE * hb_fsCurDir( USHORT uiDrive )
{
static BYTE s_byDirBuffer[ _POSIX_PATH_MAX + 1 ];
HB_TRACE(HB_TR_DEBUG, ("hb_fsCurDir(%hu)", uiDrive));
hb_fsCurDirBuff( uiDrive, s_byDirBuffer, _POSIX_PATH_MAX + 1 );
return ( BYTE * ) s_byDirBuffer;
}
/* NOTE: Thread safe version of hb_fsCurDir() */
/* NOTE: 0 = current drive, 1 = A, 2 = B, 3 = C, etc. */
USHORT hb_fsCurDirBuff( USHORT uiDrive, BYTE * pbyBuffer, ULONG ulLen )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsCurDirBuff(%hu)", uiDrive));
HB_SYMBOL_UNUSED( uiDrive );
pbyBuffer[ 0 ] = '\0';
#if defined(HAVE_POSIX_IO)
errno = 0;
getcwd( ( char * ) pbyBuffer, ulLen );
s_uiErrorLast = errno;
#elif defined(__MINGW32__)
errno = 0;
_getdcwd( uiDrive, pbyBuffer, ulLen );
s_uiErrorLast = errno;
#else
s_uiErrorLast = FS_ERROR;
#endif
/* Strip the leading drive spec, and leading backslash if there's one. */
{
BYTE * pbyStart = pbyBuffer;
/* NOTE: A trailing underscore is not returned on this platform,
so we don't need to strip it. [vszakats] */
if( pbyStart[ 1 ] == ':' )
pbyStart += 2;
if( strchr( OS_PATH_DELIMITER_LIST, pbyStart[ 0 ] ) )
pbyStart++;
if( pbyBuffer != pbyStart )
memmove( pbyBuffer, pbyStart, ulLen );
}
/* Strip the trailing (back)slash if there's one */
{
ULONG ulLen = strlen( ( char * ) pbyBuffer );
if( strchr( OS_PATH_DELIMITER_LIST, pbyBuffer[ ulLen - 1 ] ) )
pbyBuffer[ ulLen - 1 ] = '\0';
}
return s_uiErrorLast;
}
/* NOTE: 0=A:, 1=B:, 2=C:, 3=D:, ... */
USHORT hb_fsChDrv( BYTE nDrive )
{
USHORT uiResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsChDrv(%d)", (int) nDrive));
#if defined(HB_FS_DRIVE_LETTER)
#if defined( __WATCOMC__ )
{
/* 'unsigned int' _have to_ be used in Watcom
*/
unsigned int uiSave;
unsigned int uiTotal;
/* 1 = A:, 2 = B:, 3 = C:, etc
* _dos_*() functions don't set 'errno'
*/
_dos_getdrive( &uiSave );
_dos_setdrive( nDrive + 1, &uiTotal );
_dos_getdrive( &uiTotal );
if( ( nDrive + 1 ) == uiTotal )
{
uiResult = 0;
s_uiErrorLast = 0;
}
else
{
_dos_setdrive( uiSave, &uiTotal );
uiResult = FS_ERROR;
s_uiErrorLast = FS_ERROR;
}
}
#else
{
USHORT uiSave = _getdrive();
errno = 0;
_chdrive( nDrive + 1 );
if( ( nDrive + 1 ) == _getdrive() )
{
uiResult = 0;
s_uiErrorLast = errno;
}
else
{
_chdrive( uiSave );
uiResult = FS_ERROR;
s_uiErrorLast = FS_ERROR;
}
}
#endif
#else
uiResult = FS_ERROR;
s_uiErrorLast = FS_ERROR;
#endif
return uiResult;
}
/* NOTE: 0=A:, 1=B:, 2=C:, 3=D:, ... */
/* TOFIX: This isn't fully compliant because CA-Cl*pper doesn't access
the drive before checking. hb_fsIsDrv only returns TRUE
if there is a disk in the drive. */
USHORT hb_fsIsDrv( BYTE nDrive )
{
USHORT uiResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsIsDrv(%d)", (int) nDrive));
#if defined(HB_FS_DRIVE_LETTER)
#if defined( __WATCOMC__ )
{
/* 'unsigned int' _have to_ be used in Watcom
*/
unsigned int uiSave;
unsigned int uiTotal;
/* 1= A:, 2 = B:, 3 = C:, etc
* _dos_*() functions don't set 'errno'
*/
_dos_getdrive( &uiSave );
s_uiErrorLast = 0;
uiResult = 0;
_dos_setdrive( nDrive + 1, &uiTotal );
_dos_getdrive( &uiTotal );
if( ( nDrive + 1 ) != uiTotal )
{
s_uiErrorLast = FS_ERROR;
uiResult = FS_ERROR;
}
_dos_setdrive( uiSave, &uiTotal );
}
#else
{
USHORT uiSave = _getdrive();
errno = 0;
_chdrive( nDrive + 1 );
if( ( nDrive + 1 ) == _getdrive() )
{
uiResult = 0;
s_uiErrorLast = errno;
}
else
{
uiResult = FS_ERROR;
s_uiErrorLast = FS_ERROR;
}
_chdrive( uiSave );
}
#endif
#else
uiResult = FS_ERROR;
s_uiErrorLast = FS_ERROR;
#endif
return uiResult;
}
BOOL hb_fsIsDevice( FHANDLE hFileHandle )
{
BOOL bResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsIsDevice(%p)", hFileHandle));
#if defined(HB_FS_DRIVE_LETTER)
errno = 0;
bResult = ( isatty( hFileHandle ) == 0 );
s_uiErrorLast = errno;
#else
bResult = FALSE;
s_uiErrorLast = FS_ERROR;
HB_SYMBOL_UNUSED( hFileHandle );
#endif
return bResult;
}
/* NOTE: 0=A:, 1=B:, 2=C:, 3=D:, ... */
BYTE hb_fsCurDrv( void )
{
USHORT uiResult;
HB_TRACE(HB_TR_DEBUG, ("hb_fsCurDrv()"));
#if defined(HB_FS_DRIVE_LETTER)
{
errno = 0;
uiResult = _getdrive();
#if defined(__DJGPP__)
/* _getdrive() returned a drive number, base 0. */
#else
if( uiResult < 65 )
{
/* _getdrive() returned a drive number, base 1. */
uiResult--;
}
else
{
/* _getdrive() returned a drive letter. */
uiResult -= 65;
}
#endif
s_uiErrorLast = errno;
}
#elif defined( __WATCOMC__ )
{
/* 'unsigned int' _have to_ be used in Watcom
*/
unsigned uiDrive;
/* 1 = A:, 2 = B:, 3 = C:, etc
* _dos_*() functions don't set 'errno'
*/
_dos_getdrive( &uiDrive );
s_uiErrorLast = 0;
uiResult = ( USHORT ) uiDrive -1;
}
#else
uiResult = 0;
s_uiErrorLast = FS_ERROR;
#endif
return ( BYTE ) uiResult; /* Return the drive number, base 0. */
}
/* TODO: Implement hb_fsExtOpen */
FHANDLE hb_fsExtOpen( BYTE * pFilename, BYTE * pDefExt,
USHORT uiFlags, BYTE * pPaths, PHB_ITEM pError )
{
HB_TRACE(HB_TR_DEBUG, ("hb_fsExtOpen(%s, %s, %hu, %p, %p)", (char*) pFilename, (char*) pDefExt, uiFlags, pPaths, pError));
s_uiErrorLast = FS_ERROR;
HB_SYMBOL_UNUSED( pFilename );
HB_SYMBOL_UNUSED( pDefExt );
HB_SYMBOL_UNUSED( uiFlags );
HB_SYMBOL_UNUSED( pPaths );
HB_SYMBOL_UNUSED( pError );
return s_uiErrorLast;
}
/* TOFIX: CA-Cl*pper will allow wildcards in the filename. This should be
added to Harbour. [vszakats] */
BOOL hb_fsFile( BYTE * pFilename )
{
BOOL bIsFile;
HB_TRACE(HB_TR_DEBUG, ("hb_fsFile(%s)", (char*) pFilename));
/* TODO: Check if F_OK is defined in all compilers */
#if defined(OS_UNIX_COMPATIBLE)
bIsFile = ( access( ( const char * ) pFilename, F_OK ) == 0 );
#elif defined(__MPW__)
{
int hFileHandle;
if( ( hFileHandle = open( pFilename, O_RDONLY ) ) >= 0 )
{
close( hFileHandle );
bIsFile = TRUE;
}
else
bIsFile = FALSE;
}
#else
bIsFile = ( access( ( const char * ) pFilename, 0 ) == 0 );
#endif
return bIsFile;
}
BOOL hb_fsEof( FHANDLE hFileHandle )
{
#if defined(__DJGPP__) || defined(__CYGWIN__) || defined(OS_UNIX_COMPATIBLE)
long curPos = lseek( hFileHandle, 0L, SEEK_CUR );
long endPos = lseek( hFileHandle, 0L, SEEK_END );
long newPos = lseek( hFileHandle, curPos, SEEK_SET );
if( newPos == -1L )
{
hb_fsSetError( errno );
}
else if( newPos != curPos )
{
hb_fsSetError( FS_ERROR );
}
return curPos >= endPos;
#else
return eof( hFileHandle ) != 0;
#endif
}
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