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
32 /* This is the private state used if PS is NULL. */
33 static mbstate_t state
;
35 /* This is a non-standard function but it is very useful in the
36 implementation of stdio because we have to deal with unterminated
37 buffers. At most NWC wide character will be converted. */
39 __wcsnrtombs (dst
, src
, nwc
, len
, ps
)
46 struct __gconv_step_data data
;
47 const wchar_t *srcend
;
50 struct __gconv_step
*tomb
;
52 /* Tell where we want the result. */
53 data
.__invocation_counter
= 0;
54 data
.__internal_use
= 1;
56 data
.__statep
= ps
?: &state
;
60 srcend
= *src
+ __wcsnlen (*src
, nwc
- 1) + 1;
62 /* Make sure we use the correct function. */
63 update_conversion_ptrs ();
65 /* Get the structure with the function pointers. */
66 tomb
= __wcsmbs_gconv_fcts
.tomb
;
68 /* We have to handle DST == NULL special. */
71 unsigned char buf
[256]; /* Just an arbitrary value. */
72 const wchar_t *inbuf
= *src
;
76 data
.__outbufend
= buf
+ sizeof (buf
);
82 status
= (*tomb
->__fct
) (__wcsmbs_gconv_fcts
.tomb
, &data
,
83 (const unsigned char **) &inbuf
,
84 (const unsigned char *) srcend
, &dummy
,
87 /* Count the number of bytes. */
88 result
+= data
.__outbuf
- buf
;
90 while (status
== __GCONV_FULL_OUTPUT
);
92 if ((status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
)
93 && data
.__outbuf
[-1] == '\0')
94 /* Don't count the NUL character in. */
99 /* This code is based on the safe assumption that all internal
100 multi-byte encodings use the NUL byte only to mark the end
105 data
.__outbufend
= dst
+ len
;
107 status
= (*tomb
->__fct
) (__wcsmbs_gconv_fcts
.tomb
, &data
,
108 (const unsigned char **) src
,
109 (const unsigned char *) srcend
, &dummy
, 0, 1);
111 /* Count the number of bytes. */
112 result
= data
.__outbuf
- (unsigned char *) dst
;
114 /* We have to determine whether the last character converted
115 is the NUL character. */
116 if ((status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
)
117 && data
.__outbuf
[-1] == '\0')
119 assert (data
.__outbuf
!= (unsigned char *) dst
);
120 assert (__mbsinit (data
.__statep
));
126 /* There must not be any problems with the conversion but illegal input
128 assert (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
129 || status
== __GCONV_ILLEGAL_INPUT
130 || status
== __GCONV_INCOMPLETE_INPUT
131 || status
== __GCONV_FULL_OUTPUT
);
133 if (status
!= __GCONV_OK
&& status
!= __GCONV_FULL_OUTPUT
134 && status
!= __GCONV_EMPTY_INPUT
)
136 result
= (size_t) -1;
137 __set_errno (EILSEQ
);
142 weak_alias (__wcsnrtombs
, wcsnrtombs
)