/****************************************************************************
*
* 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 fgetc() implementation.
*
****************************************************************************/
#include "variety.h"
#include "widechar.h"
#include <stdio.h>
#include <unistd.h>
#ifndef __UNIX__
#include <conio.h>
#endif
#include "fileacc.h"
#include <errno.h>
#include "rtdata.h"
#include "seterrno.h"
#ifdef __WIDECHAR__
#include <mbstring.h>
#include <wchar.h>
#endif
#include "qread.h"
#include "orient.h"
#include "flush.h"
#include "streamio.h"
#define DOS_EOF_CHAR 0x1a
#ifdef __WIDECHAR__
#define CHARMASK 0xffff
#else
#define CHARMASK 0xff
#endif
int __F_NAME(__fill_buffer,__wfill_buffer)( FILE *fp )
{
if( _FP_BASE(fp) == NULL ) {
__ioalloc( fp );
}
if( fp->_flag & _ISTTY ) { /* 20-aug-90 */
if( fp->_flag & (_IONBF | _IOLBF) ) {
__flushall( _ISTTY ); /* flush all TTY output */
}
}
fp->_flag &= ~_UNGET; /* 10-mar-90 */
fp->_ptr = _FP_BASE(fp);
#ifdef __UNIX__
fp->_cnt = __qread( fileno( fp ), fp->_ptr,
(fp->_flag & _IONBF) ? CHARSIZE : fp->_bufsize );
#else
if(( fp->_flag & (_IONBF | _ISTTY)) == (_IONBF | _ISTTY) &&
( fileno( fp ) == STDIN_FILENO ))
{
int c; /* JBS 31-may-91 */
fp->_cnt = 0;
// c = getche();
if( c != EOF ) {
*(CHAR_TYPE *)fp->_ptr = c;
fp->_cnt = CHARSIZE;
}
} else {
fp->_cnt = __qread( fileno( fp ), fp->_ptr,
(fp->_flag & _IONBF) ? CHARSIZE : fp->_bufsize );
}
#endif
if( fp->_cnt <= 0 ) {
if( fp->_cnt == 0 ) {
fp->_flag |= _EOF;
} else {
fp->_flag |= _SFERR;
fp->_cnt = 0;
}
}
return( fp->_cnt );
}
int __F_NAME(__filbuf,__wfilbuf)( FILE *fp )
{
if( __F_NAME(__fill_buffer,__wfill_buffer)( fp ) == 0 ) {
return( EOF );
}
else {
fp->_cnt -= CHARSIZE;
fp->_ptr += CHARSIZE;
return( *(CHAR_TYPE *)(fp->_ptr - CHARSIZE) & CHARMASK );
}
}
#ifndef __WIDECHAR__
_WCRTLINK
int fgetc( FILE
*fp
){
int c;
_ValidFile( fp, EOF );
_AccessFile( fp );
/*** Deal with stream orientation ***/
ORIENT_STREAM(fp,EOF);
if( (fp->_flag & _READ) == 0 ) {
__set_errno( EBADF );
fp->_flag |= _SFERR;
c = EOF;
} else {
fp->_cnt--;
// it is important that this remain a relative comparison
// to ensure that the getc() macro works properly
if( fp->_cnt < 0 ) {
c = __F_NAME(__filbuf,__wfilbuf)( fp );
} else {
c = *(char *)fp->_ptr;
fp->_ptr++;
}
}
#ifndef __UNIX__
if( !(fp->_flag & _BINARY) ) {
if( c == '\r' ) {
fp->_cnt--;
// it is important that this remain a relative comparison
// to ensure that the getc() macro works properly
if( fp->_cnt < 0 ) {
c = __F_NAME(__filbuf,__wfilbuf)( fp );
} else {
c = *(CHAR_TYPE*)fp->_ptr & CHARMASK;
fp->_ptr += CHARSIZE;
}
}
if( c == DOS_EOF_CHAR ) {
fp->_flag |= _EOF;
c = EOF;
}
}
#endif
_ReleaseFile( fp );
return( c );
}
#else
static int __read_wide_char( FILE *fp, wchar_t *wc )
/**************************************************/
{
if( fp->_flag & _BINARY ) {
/*** Read a wide character ***/
return( fread( wc
, sizeof( wchar_t ), 1, fp
) ); } else {
char mbc[MB_CUR_MAX];
wchar_t wcTemp;
int rc;
/*** Read the multibyte character ***/
if( !fread( &mbc
[0], 1, 1, fp
) ) return( 0 );
if( _ismbblead( mbc[0] ) ) {
if( !fread( &mbc
[1], 1, 1, fp
) ) return( 0 );
}
/*** Convert it to wide form ***/
rc = mbtowc( &wcTemp, mbc, MB_CUR_MAX );
if( rc >= 0 ) {
*wc = wcTemp;
return( 1 );
} else {
__set_errno( EILSEQ );
return( 0 );
}
}
}
_WCRTLINK wint_t
fgetwc( FILE
*fp
){
wchar_t c;
_ValidFile( fp, WEOF );
_AccessFile( fp );
/*** Deal with stream orientation ***/
ORIENT_STREAM(fp,WEOF);
/*** Read the character ***/
if( !__read_wide_char( fp, &c ) ) {
_ReleaseFile( fp );
return( WEOF );
}
if( !(fp->_flag & _BINARY) && (c == L'\r') ) {
if( !__read_wide_char( fp, &c ) ) {
_ReleaseFile( fp );
return( WEOF );
}
}
_ReleaseFile( fp );
return( (wint_t)c );
}
#endif