fdopen.c

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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: fdopen.c,v $
00036  * Revision 1.2  2008/08/11 06:59:40  haraldkipp
00037  * BSD types replaced by stdint types (feature request #1282721).
00038  *
00039  * Revision 1.1.1.1  2003/05/09 14:40:24  haraldkipp
00040  * Initial using 3.2.1
00041  *
00042  * Revision 1.1  2003/02/04 17:49:04  harald
00043  * *** empty log message ***
00044  *
00045  */
00046 
00047 #include "nut_io.h"
00048 
00049 #include <errno.h>
00050 #include <fcntl.h>
00051 #include <stdlib.h>
00052 
00053 
00058 
00077 FILE *_fdopen(int fd, CONST char *mode)
00078 {
00079     int mflags = _O_TEXT;
00080     uint_fast8_t i;
00081 
00082     /*
00083      * Translate file mode.
00084      */
00085     if ((mflags = _fmode(mode)) == EOF)
00086         return 0;
00087 
00088     /*
00089      * Find an empty slot.
00090      */
00091     for (i = 3; __iob[i]; i++)
00092         if (i >= FOPEN_MAX - 1) {
00093             errno = ENFILE;
00094             return 0;
00095         }
00096 
00097     if ((__iob[i] = malloc(sizeof(FILE))) != 0) {
00098         __iob[i]->iob_fd = fd;
00099         __iob[i]->iob_mode = mflags;
00100         __iob[i]->iob_flags = 0;
00101         __iob[i]->iob_unget = 0;
00102     } else
00103         errno = ENOMEM;
00104 
00105 
00106     return __iob[i];
00107 }
00108 

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