libexplain  1.4.D001
libexplain/putc_on_error.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2009-2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify it
00006  * under the terms of the GNU Lesser General Public License as published by
00007  * the Free Software Foundation; either version 3 of the License, or (at
00008  * your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public License
00016  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00017  */
00018 
00019 #include <libexplain/ac/errno.h>
00020 #include <libexplain/ac/stdio.h>
00021 
00022 #include <libexplain/putc.h>
00023 #include <libexplain/output.h>
00024 
00025 
00026 void
00027 explain_putc_on_error_failed(int c, FILE *fp)
00028 {
00029     int             hold_errno;
00030 
00031     hold_errno = errno;
00032     explain_output_error("%s", explain_errno_putc(hold_errno, c, fp));
00033     errno = hold_errno;
00034 }
00035 
00036 
00037 #if __GNUC__ < 3
00038 
00039 int
00040 explain_putc_on_error(int c, FILE *fp)
00041 {
00042     int             result;
00043 
00044     result = putc(c, fp);
00045     if (result == EOF)
00046         explain_putc_on_error_failed(c, fp);
00047     return result;
00048 }
00049 
00050 #endif
00051 
00052 /* vim: set ts=8 sw=4 et : */