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. */
24 #include <wcsmbsload.h>
29 # define EILSEQ EINVAL
32 /* This is the private state used if PS is NULL. */
33 static mbstate_t state
;
36 __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
);
47 /* Set information for this step. */
48 data
.__invocation_counter
= 0;
49 data
.__internal_use
= 1;
50 data
.__flags
= __GCONV_IS_LAST
;
51 data
.__statep
= ps
?: &state
;
54 /* A first special case is if S is NULL. This means put PS in the
58 outbuf
= (char *) buf
;
64 /* Tell where we want the result. */
65 data
.__outbuf
= outbuf
;
66 data
.__outbufend
= outbuf
+ sizeof (wchar_t);
68 /* Make sure we use the correct function. */
69 update_conversion_ptrs ();
71 /* Do a normal conversion. */
72 inbuf
= (const unsigned char *) s
;
73 status
= DL_CALL_FCT (__wcsmbs_gconv_fcts
.towc
->__fct
,
74 (__wcsmbs_gconv_fcts
.towc
, &data
, &inbuf
, inbuf
+ n
,
75 NULL
, &dummy
, flush
, 1));
77 /* There must not be any problems with the conversion but illegal input
78 characters. The output buffer must be large enough, otherwise the
79 definition of MB_CUR_MAX is not correct. All the other possible
80 errors also must not happen. */
81 assert (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
82 || status
== __GCONV_ILLEGAL_INPUT
83 || status
== __GCONV_INCOMPLETE_INPUT
84 || status
== __GCONV_FULL_OUTPUT
);
86 if (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
87 || status
== __GCONV_FULL_OUTPUT
)
89 if (data
.__outbuf
!= (unsigned char *) outbuf
90 && *(wchar_t *) outbuf
== L
'\0')
92 /* The converted character is the NUL character. */
93 assert (__mbsinit (data
.__statep
));
97 result
= inbuf
- (const unsigned char *) s
;
99 else if (status
== __GCONV_INCOMPLETE_INPUT
)
100 result
= (size_t) -2;
103 result
= (size_t) -1;
104 __set_errno (EILSEQ
);
109 weak_alias (__mbrtowc
, mbrtowc
)