1 /* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
23 #include <wcsmbsload.h>
28 # define EILSEQ EINVAL
31 /* This is the private state used if PS is NULL. */
32 static mbstate_t state;
35 __mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
38 struct gconv_step_data data;
43 /* Tell where we want the result. */
44 data.outbuf = (char *) (pwc ?: buf);
46 data.outbufsize = sizeof (wchar_t);
48 data.statep = ps ?: &state;
50 /* A first special case is if S is NULL. This means put PS in the
54 data.outbuf = (char *) buf;
59 /* Make sure we use the correct function. */
60 update_conversion_ptrs ();
62 /* Do a normal conversion. */
64 status = (*__wcsmbs_gconv_fcts.towc->fct) (__wcsmbs_gconv_fcts.towc,
65 &data, s, &inbytes, NULL, 0);
67 /* There must not be any problems with the conversion but illegal input
68 characters. The output buffer must be large enough, otherwise the
69 definition of MB_CUR_MAX is not correct. All the other possible
70 errors also must not happen. */
71 assert (status == GCONV_OK || status == GCONV_EMPTY_INPUT
72 || status == GCONV_ILLEGAL_INPUT
73 || status == GCONV_INCOMPLETE_INPUT
74 || status == GCONV_FULL_OUTPUT);
76 if (status == GCONV_OK || status == GCONV_EMPTY_INPUT
77 || status == GCONV_FULL_OUTPUT)
79 if (data.outbufavail > 0 && *(wchar_t *)data.outbuf == L'\0')
81 /* The converted character is the NUL character. */
82 assert (__mbsinit (data.statep));
90 result = status == GCONV_INCOMPLETE_INPUT ? (size_t) -2 : (size_t) -1;
96 weak_alias (__mbrtowc, mbrtowc)