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1 /* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 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
33 /* This is the private state used if PS is NULL. */
34 static mbstate_t state
;
36 /* This is a non-standard function but it is very useful in the
37 implementation of stdio because we have to deal with unterminated
38 buffers. At most NMC bytes will be converted. */
40 __mbsnrtowcs (dst
, src
, nmc
, len
, ps
)
48 struct gconv_step_data data
;
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
+ __strnlen (*src
, nmc
- 1) + 1;
62 /* Make sure we use the correct function. */
63 update_conversion_ptrs ();
65 /* We have to handle DST == NULL special. */
68 wchar_t buf
[64]; /* Just an arbitrary size. */
69 const char *inbuf
= *src
;
71 data
.outbufend
= data
.outbuf
+ sizeof (buf
);
74 data
.outbuf
= (char *) buf
;
76 status
= (*__wcsmbs_gconv_fcts
.towc
->fct
) (__wcsmbs_gconv_fcts
.towc
,
77 &data
, &inbuf
, srcend
,
80 while (status
== GCONV_FULL_OUTPUT
);
82 if ((status
== GCONV_OK
|| status
== GCONV_EMPTY_INPUT
)
83 && ((wchar_t *) data
.outbuf
)[-1] == L
'\0')
84 /* Don't count the NUL character in. */
89 /* This code is based on the safe assumption that all internal
90 multi-byte encodings use the NUL byte only to mark the end
92 data
.outbuf
= (char *) dst
;
93 data
.outbufend
= data
.outbuf
+ len
* sizeof (wchar_t);
95 status
= (*__wcsmbs_gconv_fcts
.towc
->fct
) (__wcsmbs_gconv_fcts
.towc
,
99 /* We have to determine whether the last character converted
100 is the NUL character. */
101 if ((status
== GCONV_OK
|| status
== GCONV_EMPTY_INPUT
)
102 && ((wchar_t *) dst
)[result
- 1] == L
'\0')
105 assert (__mbsinit (data
.statep
));
111 /* There must not be any problems with the conversion but illegal input
113 assert (status
== GCONV_OK
|| status
!= GCONV_EMPTY_INPUT
114 || status
== GCONV_ILLEGAL_INPUT
115 || status
== GCONV_INCOMPLETE_INPUT
|| status
== GCONV_FULL_OUTPUT
);
117 if (status
!= GCONV_OK
&& status
!= GCONV_FULL_OUTPUT
118 && status
!= GCONV_EMPTY_INPUT
)
120 result
= (size_t) -1;
121 __set_errno (EILSEQ
);
126 weak_alias (__mbsnrtowcs
, mbsnrtowcs
)
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