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 /* Set information for this step. */
47 data
.__invocation_counter
= 0;
48 data
.__internal_use
= 1;
50 data
.__statep
= ps
?: &state
;
52 /* A first special case is if S is NULL. This means put PS in the
56 outbuf
= (char *) buf
;
59 temp_state
= *data
.__statep
;
60 data
.__statep
= &temp_state
;
63 /* Tell where we want the result. */
64 data
.__outbuf
= outbuf
;
65 data
.__outbufend
= outbuf
+ sizeof (wchar_t);
67 /* Make sure we use the correct function. */
68 update_conversion_ptrs ();
70 /* Do a normal conversion. */
71 inbuf
= (const unsigned char *) s
;
72 status
= (*__wcsmbs_gconv_fcts
.towc
->__fct
) (__wcsmbs_gconv_fcts
.towc
,
73 &data
, &inbuf
, inbuf
+ n
,
76 /* There must not be any problems with the conversion but illegal input
77 characters. The output buffer must be large enough, otherwise the
78 definition of MB_CUR_MAX is not correct. All the other possible
79 errors also must not happen. */
80 assert (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
81 || status
== __GCONV_ILLEGAL_INPUT
82 || status
== __GCONV_INCOMPLETE_INPUT
83 || status
== __GCONV_FULL_OUTPUT
);
85 if (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
86 || status
== __GCONV_FULL_OUTPUT
)
88 if (data
.__outbuf
!= (unsigned char *) outbuf
89 && *(wchar_t *) outbuf
== L
'\0')
91 /* The converted character is the NUL character. */
92 assert (__mbsinit (data
.__statep
));
96 result
= inbuf
- (const unsigned char *) s
;
98 else if (status
== __GCONV_INCOMPLETE_INPUT
)
102 result
= (size_t) -1;
103 __set_errno (EILSEQ
);
108 weak_alias (__mbrtowc
, mbrtowc
)