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Sweden-Number/dlls/kernel/file.c

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/*
* File handling functions
*
* Copyright 1993 John Burton
* Copyright 1996 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* TODO:
* Fix the CopyFileEx methods to implement the "extended" functionality.
* Right now, they simply call the CopyFile method.
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "winerror.h"
#include "ntstatus.h"
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winternl.h"
#include "wincon.h"
#include "kernel_private.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "async.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
/**************************************************************************
* Operations on file handles *
**************************************************************************/
/***********************************************************************
* GetOverlappedResult (KERNEL32.@)
*
* Check the result of an Asynchronous data transfer from a file.
*
* Parameters
* HANDLE hFile [in] handle of file to check on
* LPOVERLAPPED lpOverlapped [in/out] pointer to overlapped
* LPDWORD lpTransferred [in/out] number of bytes transferred
* BOOL bWait [in] wait for the transfer to complete ?
*
* RETURNS
* TRUE on success
* FALSE on failure
*
* If successful (and relevant) lpTransferred will hold the number of
* bytes transferred during the async operation.
*
* BUGS
*
* Currently only works for WaitCommEvent, ReadFile, WriteFile
* with communications ports.
*
*/
BOOL WINAPI GetOverlappedResult(HANDLE hFile, LPOVERLAPPED lpOverlapped,
LPDWORD lpTransferred, BOOL bWait)
{
DWORD r;
TRACE("(%p %p %p %x)\n", hFile, lpOverlapped, lpTransferred, bWait);
if (lpOverlapped==NULL)
{
ERR("lpOverlapped was null\n");
return FALSE;
}
if (!lpOverlapped->hEvent)
{
ERR("lpOverlapped->hEvent was null\n");
return FALSE;
}
if ( bWait )
{
do {
TRACE("waiting on %p\n",lpOverlapped);
r = WaitForSingleObjectEx(lpOverlapped->hEvent, INFINITE, TRUE);
TRACE("wait on %p returned %ld\n",lpOverlapped,r);
} while (r==STATUS_USER_APC);
}
else if ( lpOverlapped->Internal == STATUS_PENDING )
{
/* Wait in order to give APCs a chance to run. */
/* This is cheating, so we must set the event again in case of success -
it may be a non-manual reset event. */
do {
TRACE("waiting on %p\n",lpOverlapped);
r = WaitForSingleObjectEx(lpOverlapped->hEvent, 0, TRUE);
TRACE("wait on %p returned %ld\n",lpOverlapped,r);
} while (r==STATUS_USER_APC);
if ( r == WAIT_OBJECT_0 )
NtSetEvent ( lpOverlapped->hEvent, NULL );
}
if(lpTransferred)
*lpTransferred = lpOverlapped->InternalHigh;
switch ( lpOverlapped->Internal )
{
case STATUS_SUCCESS:
return TRUE;
case STATUS_PENDING:
SetLastError ( ERROR_IO_INCOMPLETE );
if ( bWait ) ERR ("PENDING status after waiting!\n");
return FALSE;
default:
SetLastError ( RtlNtStatusToDosError ( lpOverlapped->Internal ) );
return FALSE;
}
}
/***********************************************************************
* CancelIo (KERNEL32.@)
*/
BOOL WINAPI CancelIo(HANDLE handle)
{
async_private *ovp,*t;
TRACE("handle = %p\n",handle);
for (ovp = NtCurrentTeb()->pending_list; ovp; ovp = t)
{
t = ovp->next;
if ( ovp->handle == handle )
cancel_async ( ovp );
}
SleepEx(1,TRUE);
return TRUE;
}
/***********************************************************************
* _hread (KERNEL32.@)
*/
LONG WINAPI _hread( HFILE hFile, LPVOID buffer, LONG count)
{
return _lread( hFile, buffer, count );
}
/***********************************************************************
* _hwrite (KERNEL32.@)
*
* experimentation yields that _lwrite:
* o truncates the file at the current position with
* a 0 len write
* o returns 0 on a 0 length write
* o works with console handles
*
*/
LONG WINAPI _hwrite( HFILE handle, LPCSTR buffer, LONG count )
{
DWORD result;
TRACE("%d %p %ld\n", handle, buffer, count );
if (!count)
{
/* Expand or truncate at current position */
if (!SetEndOfFile( (HANDLE)handle )) return HFILE_ERROR;
return 0;
}
if (!WriteFile( (HANDLE)handle, buffer, count, &result, NULL ))
return HFILE_ERROR;
return result;
}
/***********************************************************************
* _lclose (KERNEL32.@)
*/
HFILE WINAPI _lclose( HFILE hFile )
{
TRACE("handle %d\n", hFile );
return CloseHandle( (HANDLE)hFile ) ? 0 : HFILE_ERROR;
}
/***********************************************************************
* _lcreat (KERNEL32.@)
*/
HFILE WINAPI _lcreat( LPCSTR path, INT attr )
{
/* Mask off all flags not explicitly allowed by the doc */
attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
TRACE("%s %02x\n", path, attr );
return (HFILE)CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
CREATE_ALWAYS, attr, 0 );
}
/***********************************************************************
* _lopen (KERNEL32.@)
*/
HFILE WINAPI _lopen( LPCSTR path, INT mode )
{
DWORD access, sharing;
TRACE("('%s',%04x)\n", path, mode );
FILE_ConvertOFMode( mode, &access, &sharing );
return (HFILE)CreateFileA( path, access, sharing, NULL, OPEN_EXISTING, 0, 0 );
}
/***********************************************************************
* _lread (KERNEL32.@)
*/
UINT WINAPI _lread( HFILE handle, LPVOID buffer, UINT count )
{
DWORD result;
if (!ReadFile( (HANDLE)handle, buffer, count, &result, NULL )) return -1;
return result;
}
/***********************************************************************
* _llseek (KERNEL32.@)
*/
LONG WINAPI _llseek( HFILE hFile, LONG lOffset, INT nOrigin )
{
return SetFilePointer( (HANDLE)hFile, lOffset, NULL, nOrigin );
}
/***********************************************************************
* _lwrite (KERNEL32.@)
*/
UINT WINAPI _lwrite( HFILE hFile, LPCSTR buffer, UINT count )
{
return (UINT)_hwrite( hFile, buffer, (LONG)count );
}
/***********************************************************************
* FlushFileBuffers (KERNEL32.@)
*/
BOOL WINAPI FlushFileBuffers( HANDLE hFile )
{
NTSTATUS nts;
IO_STATUS_BLOCK ioblk;
if (is_console_handle( hFile ))
{
/* this will fail (as expected) for an output handle */
/* FIXME: wait until FlushFileBuffers is moved to dll/kernel */
/* return FlushConsoleInputBuffer( hFile ); */
return TRUE;
}
nts = NtFlushBuffersFile( hFile, &ioblk );
if (nts != STATUS_SUCCESS)
{
SetLastError( RtlNtStatusToDosError( nts ) );
return FALSE;
}
return TRUE;
}
/***********************************************************************
* GetFileSize (KERNEL32.@)
*/
DWORD WINAPI GetFileSize( HANDLE hFile, LPDWORD filesizehigh )
{
BY_HANDLE_FILE_INFORMATION info;
if (!GetFileInformationByHandle( hFile, &info )) return -1;
if (filesizehigh) *filesizehigh = info.nFileSizeHigh;
return info.nFileSizeLow;
}
/***********************************************************************
* GetFileSizeEx (KERNEL32.@)
*/
BOOL WINAPI GetFileSizeEx( HANDLE hFile, PLARGE_INTEGER lpFileSize )
{
BY_HANDLE_FILE_INFORMATION info;
if (!lpFileSize)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if (!GetFileInformationByHandle( hFile, &info ))
{
return FALSE;
}
lpFileSize->s.LowPart = info.nFileSizeLow;
lpFileSize->s.HighPart = info.nFileSizeHigh;
return TRUE;
}
/**************************************************************************
* LockFile (KERNEL32.@)
*/
BOOL WINAPI LockFile( HANDLE hFile, DWORD offset_low, DWORD offset_high,
DWORD count_low, DWORD count_high )
{
NTSTATUS status;
LARGE_INTEGER count, offset;
TRACE( "%p %lx%08lx %lx%08lx\n",
hFile, offset_high, offset_low, count_high, count_low );
count.s.LowPart = count_low;
count.s.HighPart = count_high;
offset.s.LowPart = offset_low;
offset.s.HighPart = offset_high;
status = NtLockFile( hFile, 0, NULL, NULL,
NULL, &offset, &count, NULL, TRUE, TRUE );
if (status != STATUS_SUCCESS) SetLastError( RtlNtStatusToDosError(status) );
return !status;
}
/**************************************************************************
* LockFileEx [KERNEL32.@]
*
* Locks a byte range within an open file for shared or exclusive access.
*
* RETURNS
* success: TRUE
* failure: FALSE
*
* NOTES
* Per Microsoft docs, the third parameter (reserved) must be set to 0.
*/
BOOL WINAPI LockFileEx( HANDLE hFile, DWORD flags, DWORD reserved,
DWORD count_low, DWORD count_high, LPOVERLAPPED overlapped )
{
NTSTATUS status;
LARGE_INTEGER count, offset;
if (reserved)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
TRACE( "%p %lx%08lx %lx%08lx flags %lx\n",
hFile, overlapped->OffsetHigh, overlapped->Offset,
count_high, count_low, flags );
count.s.LowPart = count_low;
count.s.HighPart = count_high;
offset.s.LowPart = overlapped->Offset;
offset.s.HighPart = overlapped->OffsetHigh;
status = NtLockFile( hFile, overlapped->hEvent, NULL, NULL,
NULL, &offset, &count, NULL,
flags & LOCKFILE_FAIL_IMMEDIATELY,
flags & LOCKFILE_EXCLUSIVE_LOCK );
if (status) SetLastError( RtlNtStatusToDosError(status) );
return !status;
}
/**************************************************************************
* UnlockFile (KERNEL32.@)
*/
BOOL WINAPI UnlockFile( HANDLE hFile, DWORD offset_low, DWORD offset_high,
DWORD count_low, DWORD count_high )
{
NTSTATUS status;
LARGE_INTEGER count, offset;
count.s.LowPart = count_low;
count.s.HighPart = count_high;
offset.s.LowPart = offset_low;
offset.s.HighPart = offset_high;
status = NtUnlockFile( hFile, NULL, &offset, &count, NULL);
if (status) SetLastError( RtlNtStatusToDosError(status) );
return !status;
}
/**************************************************************************
* UnlockFileEx (KERNEL32.@)
*/
BOOL WINAPI UnlockFileEx( HANDLE hFile, DWORD reserved, DWORD count_low, DWORD count_high,
LPOVERLAPPED overlapped )
{
if (reserved)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if (overlapped->hEvent) FIXME("Unimplemented overlapped operation\n");
return UnlockFile( hFile, overlapped->Offset, overlapped->OffsetHigh, count_low, count_high );
}
/**************************************************************************
* Operations on file names *
**************************************************************************/
/**************************************************************************
* ReplaceFileW (KERNEL32.@)
* ReplaceFile (KERNEL32.@)
*/
BOOL WINAPI ReplaceFileW(LPCWSTR lpReplacedFileName,LPCWSTR lpReplacementFileName,
LPCWSTR lpBackupFileName, DWORD dwReplaceFlags,
LPVOID lpExclude, LPVOID lpReserved)
{
FIXME("(%s,%s,%s,%08lx,%p,%p) stub\n",debugstr_w(lpReplacedFileName),debugstr_w(lpReplacementFileName),
debugstr_w(lpBackupFileName),dwReplaceFlags,lpExclude,lpReserved);
SetLastError(ERROR_UNABLE_TO_MOVE_REPLACEMENT);
return FALSE;
}
/**************************************************************************
* ReplaceFileA (KERNEL32.@)
*/
BOOL WINAPI ReplaceFileA(LPCSTR lpReplacedFileName,LPCSTR lpReplacementFileName,
LPCSTR lpBackupFileName, DWORD dwReplaceFlags,
LPVOID lpExclude, LPVOID lpReserved)
{
FIXME("(%s,%s,%s,%08lx,%p,%p) stub\n",lpReplacedFileName,lpReplacementFileName,
lpBackupFileName,dwReplaceFlags,lpExclude,lpReserved);
SetLastError(ERROR_UNABLE_TO_MOVE_REPLACEMENT);
return FALSE;
}
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