1 /* Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.org>, 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)
39 struct __gconv_step_data data;
43 const unsigned char *inbuf;
44 char *outbuf = (char *) (pwc ?: buf);
46 /* Tell where we want the result. */
47 data.__outbuf = outbuf;
48 data.__outbufend = outbuf + sizeof (wchar_t);
49 data.__invocation_counter = 0;
50 data.__internal_use = 1;
52 data.__statep = ps ?: &state;
54 /* A first special case is if S is NULL. This means put PS in the
58 data.__outbuf = (char *) buf;
61 temp_state = *data.__statep;
62 data.__statep = &temp_state;
65 /* Make sure we use the correct function. */
66 update_conversion_ptrs ();
68 /* Do a normal conversion. */
69 inbuf = (const unsigned char *) s;
70 status = (*__wcsmbs_gconv_fcts.towc->__fct) (__wcsmbs_gconv_fcts.towc,
71 &data, &inbuf, inbuf + n,
74 /* There must not be any problems with the conversion but illegal input
75 characters. The output buffer must be large enough, otherwise the
76 definition of MB_CUR_MAX is not correct. All the other possible
77 errors also must not happen. */
78 assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
79 || status == __GCONV_ILLEGAL_INPUT
80 || status == __GCONV_INCOMPLETE_INPUT
81 || status == __GCONV_FULL_OUTPUT);
83 if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
84 || status == __GCONV_FULL_OUTPUT)
86 if (data.__outbuf != (unsigned char *) outbuf
87 && *(wchar_t *) outbuf == L'\0')
89 /* The converted character is the NUL character. */
90 assert (__mbsinit (data.__statep));
94 result = inbuf - (const unsigned char *) s;
96 else if (status == __GCONV_INCOMPLETE_INPUT)
100 result = (size_t) -1;
101 __set_errno (EILSEQ);
106 weak_alias (__mbrtowc, mbrtowc)