kolibrios/programs/develop/open watcom/trunk/clib/handleio/qread.c

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/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
* DESCRIBE IT HERE!
*
****************************************************************************/
#include "variety.h"
#include "iomode.h"
#include "rtcheck.h"
#include "seterrno.h"
#include "qread.h"
#include <stdio.h>
typedef struct
{
char *name;
unsigned int offset;
}__file_handle;
int _stdcall read_file (const char *name,char *buff,unsigned offset, unsigned count,unsigned *reads);
int __qread( int handle, void *buffer, unsigned len )
{
__file_handle *fh;
unsigned amount_read=0;
__handle_check( handle, -1 );
fh = (__file_handle*) __getOSHandle( handle );
if(read_file(fh->name,buffer,fh->offset,len,&amount_read))
{
if ( amount_read == 0)
return (-1);
}
fh->offset+=amount_read;
return( amount_read );
};