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kernel32: Reimplemented SetFilePointerEx on top of ntdll functions.

This commit is contained in:
Alexandre Julliard 2006-11-01 16:12:57 +01:00
parent 83a66a981f
commit 2cb4361c06
1 changed files with 35 additions and 32 deletions
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67
dlls/kernel32/file.c
View File

@ -47,7 +47,6 @@
#include "wine/unicode.h"
#include "wine/debug.h"
#include "thread.h"
#include "wine/server.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
@ -940,44 +939,48 @@ DWORD WINAPI SetFilePointer( HANDLE hFile, LONG distance, LONG *highword, DWORD
BOOL WINAPI SetFilePointerEx( HANDLE hFile, LARGE_INTEGER distance,
LARGE_INTEGER *newpos, DWORD method )
{
static const int whence[3] = { SEEK_SET, SEEK_CUR, SEEK_END };
BOOL ret = FALSE;
NTSTATUS status;
int fd;
LONGLONG pos;
IO_STATUS_BLOCK io;
FILE_POSITION_INFORMATION info;
TRACE("handle %p offset %s newpos %p origin %d\n",
hFile, wine_dbgstr_longlong(distance.QuadPart), newpos, method );
if (method > FILE_END)
switch(method)
{
SetLastError( ERROR_INVALID_PARAMETER );
return ret;
}
if (!(status = wine_server_handle_to_fd( hFile, 0, &fd, NULL )))
{
off_t pos, res;
case FILE_BEGIN:
pos = distance.QuadPart;
if ((res = lseek( fd, pos, whence[method] )) == (off_t)-1)
break;
case FILE_CURRENT:
if (NtQueryInformationFile( hFile, &io, &info, sizeof(info), FilePositionInformation ))
goto error;
pos = info.CurrentByteOffset.QuadPart + distance.QuadPart;
break;
case FILE_END:
{
/* also check EPERM due to SuSE7 2.2.16 lseek() EPERM kernel bug */
if (((errno == EINVAL) || (errno == EPERM)) && (method != FILE_BEGIN) && (pos < 0))
SetLastError( ERROR_NEGATIVE_SEEK );
else
FILE_SetDosError();
FILE_END_OF_FILE_INFORMATION eof;
if (NtQueryInformationFile( hFile, &io, &eof, sizeof(eof), FileEndOfFileInformation ))
goto error;
pos = eof.EndOfFile.QuadPart + distance.QuadPart;
}
else
{
ret = TRUE;
if( newpos )
newpos->QuadPart = res;
}
wine_server_release_fd( hFile, fd );
break;
default:
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
else SetLastError( RtlNtStatusToDosError(status) );
return ret;
if (pos < 0)
{
SetLastError( ERROR_NEGATIVE_SEEK );
return FALSE;
}
info.CurrentByteOffset.QuadPart = pos;
if (NtSetInformationFile( hFile, &io, &info, sizeof(info), FilePositionInformation ))
goto error;
if (newpos) newpos->QuadPart = pos;
return TRUE;
error:
SetLastError( RtlNtStatusToDosError(io.u.Status) );
return FALSE;
}
/***********************************************************************