1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
22 #include <wcsmbs/wcsmbsload.h>
25 /* Convert the multibyte character at S, which is no longer
26 than N characters, to its `wchar_t' representation, placing
27 this n *PWC and returning its length.
29 Attention: this function should NEVER be intentionally used.
30 The interface is completely stupid. The state is shared between
31 all conversion functions. You should use instead the restartable
34 mbtowc (wchar_t *pwc, const char *s, size_t n)
37 static mbstate_t state;
39 /* If S is NULL the function has to return null or not null
40 depending on the encoding having a state depending encoding or
44 const struct gconv_fcts *fcts;
46 /* Get the conversion functions. */
47 fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
49 /* This is an extension in the Unix standard which does not directly
51 memset (&state, '\0', sizeof state);
53 result = fcts->towc->__stateful;
63 result = __mbrtowc (pwc, s, n, &state);
65 /* The `mbrtowc' functions tell us more than we need. Fold the -1
66 and -2 result into -1. */