libexplain  1.4.D001
libexplain/iconv_open_or_die.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 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, but
00011  * WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
00013  * 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/iconv.h>
00021 
00022 #include <libexplain/iconv_open.h>
00023 #include <libexplain/output.h>
00024 
00025 
00026 #define FAIL ((iconv_t)(-1))
00027 
00028 
00029 iconv_t
00030 explain_iconv_open_or_die(const char *tocode, const char *fromcode)
00031 {
00032     iconv_t         result;
00033 
00034     result = explain_iconv_open_on_error(tocode, fromcode);
00035     if (result == FAIL)
00036     {
00037         explain_output_exit_failure();
00038     }
00039     return result;
00040 }
00041 
00042 
00043 iconv_t
00044 explain_iconv_open_on_error(const char *tocode, const char *fromcode)
00045 {
00046     iconv_t         result;
00047     int             hold_errno;
00048 
00049     hold_errno = errno;
00050     errno = 0;
00051 #ifdef HAVE_ICONV_OPEN
00052     result = iconv_open(tocode, fromcode);
00053 #else
00054     errno = ENOSYS;
00055     result = FAIL;
00056 #endif
00057     if (result == FAIL)
00058     {
00059         hold_errno = errno ? errno : EINVAL;
00060         explain_output_error
00061         (
00062             "%s",
00063             explain_errno_iconv_open(hold_errno, tocode, fromcode)
00064         );
00065         errno = hold_errno;
00066     }
00067     errno = hold_errno;
00068     return result;
00069 }
00070 
00071 
00072 /* vim: set ts=8 sw=4 et : */