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. */
54 data.statep = ps ?: &state;
58 srcend = *src + __strnlen (*src, nmc - 1) + 1;
60 /* Make sure we use the correct function. */
61 update_conversion_ptrs ();
63 /* We have to handle DST == NULL special. */
66 wchar_t buf[64]; /* Just an arbitrary size. */
67 const char *inbuf = *src;
70 data.outbuf = (char *) buf;
71 data.outbufend = data.outbuf + sizeof (buf);
74 status = (*__wcsmbs_gconv_fcts.towc->fct) (__wcsmbs_gconv_fcts.towc,
75 &data, &inbuf, srcend,
79 while (status == GCONV_FULL_OUTPUT);
81 if ((status == GCONV_OK || status == GCONV_EMPTY_INPUT)
82 && buf[written - 1] == L'\0')
83 /* 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 data.outbuf = (char *) dst;
92 data.outbufend = data.outbuf + len * sizeof (wchar_t);
94 status = (*__wcsmbs_gconv_fcts.towc->fct) (__wcsmbs_gconv_fcts.towc,
98 /* We have to determine whether the last character converted
99 is the NUL character. */
100 if ((status == GCONV_OK || status == GCONV_EMPTY_INPUT)
101 && ((wchar_t *) dst)[result - 1] == L'\0')
104 assert (__mbsinit (data.statep));
110 /* There must not be any problems with the conversion but illegal input
112 assert (status == GCONV_OK || status != GCONV_EMPTY_INPUT
113 || status == GCONV_ILLEGAL_INPUT
114 || status == GCONV_INCOMPLETE_INPUT || status == GCONV_FULL_OUTPUT);
116 if (status != GCONV_OK && status != GCONV_FULL_OUTPUT
117 && status != GCONV_EMPTY_INPUT)
119 result = (size_t) -1;
120 __set_errno (EILSEQ);
125 weak_alias (__mbsnrtowcs, mbsnrtowcs)