1 /* Copyright (C) 1996, 1997, 1998, 1999 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. */
25 #include <wcsmbsload.h>
30 # define EILSEQ EINVAL
34 /* This is the private state used if PS is NULL. */
35 static mbstate_t state
;
38 __mbsrtowcs (dst
, src
, len
, ps
)
44 struct __gconv_step_data data
;
47 struct __gconv_step
*towc
;
49 /* Tell where we want the result. */
50 data
.__invocation_counter
= 0;
51 data
.__internal_use
= 1;
53 data
.__statep
= ps
?: &state
;
55 /* Make sure we use the correct function. */
56 update_conversion_ptrs ();
58 /* Get the structure with the function pointers. */
59 towc
= __wcsmbs_gconv_fcts
.towc
;
61 /* We have to handle DST == NULL special. */
64 wchar_t buf
[64]; /* Just an arbitrary size. */
65 const unsigned char *inbuf
= (const unsigned char *) *src
;
66 const unsigned char *srcend
= inbuf
+ strlen (inbuf
) + 1;
68 data
.__outbufend
= (char *) buf
+ sizeof (buf
);
71 data
.__outbuf
= (char *) buf
;
73 status
= (*towc
->__fct
) (__wcsmbs_gconv_fcts
.towc
, &data
, &inbuf
,
76 while (status
== __GCONV_FULL_OUTPUT
);
78 if (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
)
80 /* There better should be a NUL wide char at the end. */
81 assert (((wchar_t *) data
.__outbuf
)[-1] == L
'\0');
82 /* Don't count the NUL character in. */
88 /* This code is based on the safe assumption that all internal
89 multi-byte encodings use the NUL byte only to mark the end
91 const unsigned char *srcend
;
93 srcend
= (const unsigned char *) (*src
94 + __strnlen (*src
, len
* MB_CUR_MAX
)
97 data
.__outbuf
= (unsigned char *) dst
;
98 data
.__outbufend
= data
.__outbuf
+ len
* sizeof (wchar_t);
100 status
= (*towc
->__fct
) (__wcsmbs_gconv_fcts
.towc
, &data
,
101 (const unsigned char **) src
, srcend
,
104 /* We have to determine whether the last character converted
105 is the NUL character. */
106 if ((status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
)
107 && ((wchar_t *) dst
)[result
- 1] == L
'\0')
110 assert (__mbsinit (data
.__statep
));
116 /* There must not be any problems with the conversion but illegal input
118 assert (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
119 || status
== __GCONV_ILLEGAL_INPUT
120 || status
== __GCONV_INCOMPLETE_INPUT
121 || status
== __GCONV_FULL_OUTPUT
);
123 if (status
!= __GCONV_OK
&& status
!= __GCONV_FULL_OUTPUT
124 && status
!= __GCONV_EMPTY_INPUT
)
126 result
= (size_t) -1;
127 __set_errno (EILSEQ
);
132 weak_alias (__mbsrtowcs
, mbsrtowcs
)