0,0 → 1,161 |
/**************************************************************************** |
* |
* 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: Platform independent fwrite() implementation. |
* |
****************************************************************************/ |
|
|
#include "variety.h" |
#include <stdio.h> |
#include <unistd.h> |
#include <errno.h> |
#include <string.h> |
#include "fileacc.h" |
#include "rtdata.h" |
#include "seterrno.h" |
#include "qwrite.h" |
#include "flush.h" |
#include "streamio.h" |
|
|
_WCRTLINK size_t fwrite( const void *buf, size_t size, size_t n, FILE *fp ) |
{ |
size_t count; |
unsigned oflag; |
|
_ValidFile( fp, 0 ); |
_AccessFile( fp ); |
if( (fp->_flag & _WRITE) == 0 ) { |
__set_errno( EBADF ); |
fp->_flag |= _SFERR; |
_ReleaseFile( fp ); |
return( 0 ); /* POSIX says return 0 */ |
} |
n *= size; |
if( n == 0 ) { |
_ReleaseFile( fp ); |
return( n ); |
} |
if( _FP_BASE(fp) == NULL ) { |
__ioalloc( fp ); /* allocate buffer */ |
} |
oflag = fp->_flag & (_SFERR | _EOF); /* JBS 27-jan-92 */ |
fp->_flag &= ~(_SFERR | _EOF); /* JBS 27-jan-92 */ |
count = 0; |
#if !defined( __UNIX__ ) |
if( fp->_flag & _BINARY ) { /* binary I/O */ |
#else |
{ |
#endif |
size_t bytes_left = n, bytes; |
|
do { |
/* if our buffer is empty, and user's buffer is larger, |
then write directly from user's buffer. 28-apr-90 */ |
|
if( fp->_cnt == 0 && bytes_left >= fp->_bufsize ) { |
bytes = bytes_left & -512; /* multiple of 512 */ |
if( bytes == 0 ) { |
bytes = bytes_left; /* bufsize < 512 */ |
} |
n = __qwrite( fileno( fp ), buf, bytes ); |
if( n == -1 ) { |
fp->_flag |= _SFERR; |
} |
#if !defined( __UNIX__ ) |
else if( n == 0 ) { |
_RWD_errno = ENOSPC; |
fp->_flag |= _SFERR; |
} |
#endif |
bytes = n; |
} else { |
bytes = fp->_bufsize - fp->_cnt; |
if( bytes > bytes_left ) { |
bytes = bytes_left; |
} |
memcpy( fp->_ptr, buf, bytes ); |
fp->_ptr += bytes; |
fp->_cnt += bytes; |
fp->_flag |= _DIRTY; |
if( (fp->_cnt == fp->_bufsize) || (fp->_flag & _IONBF) ) { |
__flush(fp); |
} |
} |
buf = ((const char *)buf) + bytes; |
count += bytes; |
bytes_left -= bytes; |
} while( bytes_left && !ferror( fp ) ); |
#if !defined( __UNIX__ ) |
} else { /* text I/O */ |
const char *bufptr; |
int not_buffered; |
#ifndef __NETWARE__ |
int old_orientation; |
#endif |
/* temporarily enable buffering saving the previous setting */ |
not_buffered = 0; |
if( fp->_flag & _IONBF ) { |
not_buffered = 1; |
fp->_flag &= ~_IONBF; |
fp->_flag |= _IOFBF; |
} |
|
/*** Use fputc, and make it think the stream is byte-oriented ***/ |
#ifndef __NETWARE__ |
old_orientation = _FP_ORIENTATION(fp); |
_FP_ORIENTATION(fp) = _BYTE_ORIENTED; |
#endif |
bufptr = (const char *)buf; |
do { |
fputc( *(bufptr++), fp ); |
if( fp->_flag & (_EOF | _SFERR) ) break; |
++count; |
} while( count != n ); |
#ifndef __NETWARE__ |
_FP_ORIENTATION(fp) = old_orientation; |
#endif |
|
if( not_buffered ) { /* if wasn't buffered, then reset */ |
fp->_flag &= ~_IOFBF; |
fp->_flag |= _IONBF; |
__flush( fp ); |
} |
#endif |
} |
if( fp->_flag & _SFERR ) { |
/* |
* Quantum 11-17-92 Temporary buffering confuses the return |
* value if the call is interrupted. |
* kludge: return 0 on error |
*/ |
count = 0; |
} |
fp->_flag |= oflag; /* JBS 27-jan-92 */ |
_ReleaseFile( fp ); |
return( count / size ); |
} |