| /* Get descriptor for character set conversion. |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <alloca.h> |
| #include <errno.h> |
| #include <iconv.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <gconv_int.h> |
| #include "gconv_charset.h" |
| |
| |
| iconv_t |
| iconv_open (const char *tocode, const char *fromcode) |
| { |
| __gconv_t cd; |
| struct gconv_spec conv_spec; |
| |
| if (__gconv_create_spec (&conv_spec, fromcode, tocode) == NULL) |
| return (iconv_t) -1; |
| |
| int res = __gconv_open (&conv_spec, &cd, 0); |
| |
| __gconv_destroy_spec (&conv_spec); |
| |
| if (__builtin_expect (res, __GCONV_OK) != __GCONV_OK) |
| { |
| /* We must set the error number according to the specs. */ |
| if (res == __GCONV_NOCONV || res == __GCONV_NODB) |
| __set_errno (EINVAL); |
| |
| cd = (iconv_t) -1; |
| } |
| |
| return (iconv_t) cd; |
| } |