fputc.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 146 行

/****************************************************************************
*
*                            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 fputc() implementation.
*
****************************************************************************/


#include "variety.h"
#include "widechar.h"
#include <stdio.h>
#include <errno.h>
#include "fileacc.h"
#include "rtdata.h"
#include "seterrno.h"
#include "orient.h"
#ifdef __WIDECHAR__
    #include <mbstring.h>
    #include <wchar.h>
#endif
#include "flush.h"
#include "streamio.h"


#ifndef __WIDECHAR__

_WCRTLINK int fputc( int c, FILE *fp )
{
    int flags;

    _ValidFile( fp, EOF );
    _AccessFile( fp );

    /*** Deal with stream orientation ***/
    ORIENT_STREAM(fp,EOF);

    if( !(fp->_flag & _WRITE) ) {
        __set_errno( EBADF );
        fp->_flag |= _SFERR;
        _ReleaseFile( fp );
        return( EOF );
    }
    if( _FP_BASE(fp) == NULL ) {
        __ioalloc( fp );
    }
    flags = _IONBF;
    if( c == '\n' ) {
        flags = _IONBF | _IOLBF;
#ifndef __UNIX__
        if( !(fp->_flag & _BINARY) ) {
            fp->_flag |= _DIRTY;
            *(char*)fp->_ptr = '\r';   /* '\n' -> '\r''\n' */
            fp->_ptr++;
            fp->_cnt++;
            if( fp->_cnt == fp->_bufsize ) {
                if( __flush( fp ) ) {
                    _ReleaseFile( fp );
                    return( EOF );
                }
            }
        }
#endif
    }
    fp->_flag |= _DIRTY;
    *(char *)fp->_ptr = c;
    fp->_ptr++;
    fp->_cnt++;
    if( (fp->_flag & flags) || (fp->_cnt == fp->_bufsize) ) {
        if( __flush( fp ) ) {
            _ReleaseFile( fp );
            return( EOF );
        }
    }
    _ReleaseFile( fp );
    return( (UCHAR_TYPE)c );
}


#else


static int __write_wide_char( FILE *fp, wchar_t wc )
/**************************************************/
{
    if( fp->_flag & _BINARY ) {
        /*** Dump the wide character ***/
        return( fwrite( &wc, sizeof( wchar_t ), 1, fp ) );
    } else {
        char            mbc[MB_CUR_MAX];
        int             rc;

        /*** Convert the wide character to multibyte form and write it ***/
        rc = wctomb( mbc, wc );
        if( rc > 0 ) {
            return( fwrite( mbc, rc, 1, fp ) );
        } else {
            __set_errno( EILSEQ );
            return( 0 );
        }
    }
}


_WCRTLINK wint_t fputwc( wint_t c, FILE *fp )
{
    _ValidFile( fp, WEOF );
    _AccessFile( fp );

    /*** Deal with stream orientation ***/
    ORIENT_STREAM(fp,WEOF);

    /*** Write the character ***/
    if( !__write_wide_char( fp, c ) ) {
        _ReleaseFile( fp );
        return( WEOF );
    } else {
        _ReleaseFile( fp );
        return( c );
    }
}

#endif