00001 /* 00002 * Copyright (C) 2001-2003 by egnite Software GmbH. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the copyright holders nor the names of 00014 * contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00018 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00019 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00020 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00021 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00022 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00023 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00024 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00025 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00026 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00027 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * For additional information see http://www.ethernut.de/ 00031 * 00032 */ 00033 00034 /* 00035 * $Log: fgetc.c,v $ 00036 * Revision 1.4 2008/09/18 09:45:25 haraldkipp 00037 * Reading 0xFF returned EOF. Fixed. 00038 * 00039 * Revision 1.3 2008/08/11 06:59:40 haraldkipp 00040 * BSD types replaced by stdint types (feature request #1282721). 00041 * 00042 * Revision 1.2 2007/04/12 09:09:57 haraldkipp 00043 * Support for feof() and ferror() was missing. 00044 * 00045 * Revision 1.1.1.1 2003/05/09 14:40:25 haraldkipp 00046 * Initial using 3.2.1 00047 * 00048 * Revision 1.2 2003/04/21 17:33:28 harald 00049 * Return correct result for character 0xFF 00050 * 00051 * Revision 1.1 2003/02/04 17:49:04 harald 00052 * *** empty log message *** 00053 * 00054 */ 00055 00056 #include "nut_io.h" 00057 00058 #include <io.h> 00059 00064 00077 int fgetc(FILE * stream) 00078 { 00079 uint8_t ch; 00080 int rc; 00081 00082 if (stream->iob_flags & _IOUNG) { 00083 stream->iob_flags &= ~_IOUNG; 00084 return stream->iob_unget; 00085 } 00086 if ((rc = _read(stream->iob_fd, &ch, 1)) != 1) { 00087 if (rc) { 00088 /* Error. */ 00089 stream->iob_flags |= _IOERR; 00090 } 00091 else { 00092 /* Time out or end of file. */ 00093 stream->iob_flags |= _IOEOF; 00094 } 00095 return EOF; 00096 } 00097 return (int) ch; 00098 } 00099