forked from KolibriOS/kolibrios
136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/****************************************************************************
|
|
*
|
|
* 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 <stdio.h>
|
|
#include <io.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include "iomode.h"
|
|
#include "fileacc.h"
|
|
#include "rtcheck.h"
|
|
#include "rtdata.h"
|
|
#include "seterrno.h"
|
|
#include "lseek.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);
|
|
|
|
_WCRTLINK int read( int handle, void *buf, unsigned len )
|
|
{
|
|
unsigned read_len, total_len;
|
|
unsigned reduce_idx, finish_idx;
|
|
unsigned iomode_flags;
|
|
char *buffer = buf;
|
|
BOOL rc;
|
|
HANDLE h;
|
|
unsigned amount_read;
|
|
__file_handle *fh;
|
|
|
|
__handle_check( handle, -1 );
|
|
__ChkTTYIOMode( handle );
|
|
iomode_flags = __GetIOMode( handle );
|
|
if( iomode_flags == 0 )
|
|
{
|
|
__set_errno( EBADF );
|
|
return( -1 );
|
|
}
|
|
if( !(iomode_flags & _READ) )
|
|
{
|
|
__set_errno( EACCES ); /* changed from EBADF to EACCES 23-feb-89 */
|
|
return( -1 );
|
|
}
|
|
|
|
|
|
fh = (__file_handle*) __getOSHandle( handle );
|
|
|
|
if( iomode_flags & _BINARY ) /* if binary mode */
|
|
{
|
|
|
|
if(read_file(fh->name,buffer,fh->offset,len,&amount_read))
|
|
{
|
|
if ( amount_read == 0)
|
|
return (-1);
|
|
}
|
|
fh->offset+=amount_read;
|
|
total_len = amount_read;
|
|
}
|
|
else
|
|
{
|
|
total_len = 0;
|
|
read_len = len;
|
|
do
|
|
{
|
|
if(read_file(fh->name,buffer,fh->offset,len,&amount_read))
|
|
{
|
|
if( amount_read == 0 )
|
|
{ /* EOF */
|
|
break;
|
|
}
|
|
}
|
|
reduce_idx = 0;
|
|
finish_idx = reduce_idx;
|
|
for( ; reduce_idx < amount_read; ++reduce_idx )
|
|
{
|
|
if( buffer[ reduce_idx ] == 0x1a ) /* EOF */
|
|
{
|
|
__lseek( handle,
|
|
((long)reduce_idx - (long)amount_read)+1L,
|
|
SEEK_CUR );
|
|
total_len += finish_idx;
|
|
return( total_len );
|
|
}
|
|
if( buffer[ reduce_idx ] != '\r' )
|
|
{
|
|
buffer[ finish_idx++ ] = buffer[ reduce_idx ];
|
|
};
|
|
}
|
|
|
|
total_len += finish_idx;
|
|
buffer += finish_idx;
|
|
read_len -= finish_idx;
|
|
if( iomode_flags & _ISTTY )
|
|
{
|
|
break; /* 04-feb-88, FWC */
|
|
}
|
|
} while( read_len != 0 );
|
|
}
|
|
return( total_len );
|
|
}
|
|
|