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: fmode.c,v $ 00036 * Revision 1.2 2006/01/05 16:50:13 haraldkipp 00037 * Files opened with mode 'a' or 'w' will be created, if they didn't exist. 00038 * Files opened with 'w' will be truncated, if they exist. 00039 * 00040 * Revision 1.1.1.1 2003/05/09 14:40:26 haraldkipp 00041 * Initial using 3.2.1 00042 * 00043 * Revision 1.1 2003/02/04 17:49:05 harald 00044 * *** empty log message *** 00045 * 00046 */ 00047 00048 #include "nut_io.h" 00049 00050 #include <errno.h> 00051 #include <fcntl.h> 00052 00057 00063 int _fmode(CONST char *mode) 00064 { 00065 int mflags = FCNTL_TEXT; 00066 00067 switch (*mode) { 00068 case 'r': 00069 mflags |= FCNTL_RDONLY; 00070 break; 00071 case 'w': 00072 mflags |= FCNTL_WRONLY | FCNTL_CREATE | FCNTL_TRUNC; 00073 break; 00074 case 'a': 00075 mflags |= FCNTL_APPEND | FCNTL_CREATE; 00076 break; 00077 default: 00078 errno = EINVAL; 00079 return EOF; 00080 } 00081 while (*++mode) { 00082 switch (*mode) { 00083 case '+': 00084 mflags |= FCNTL_WRONLY | FCNTL_CREATE | FCNTL_TRUNC; 00085 break; 00086 case 'b': 00087 mflags &= ~FCNTL_TEXT; 00088 mflags |= FCNTL_BINARY; 00089 break; 00090 default: 00091 errno = EINVAL; 00092 return EOF; 00093 } 00094 } 00095 return mflags; 00096 } 00097