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. */
26 #include <wcsmbsload.h>
31 # define EILSEQ EINVAL
35 /* This is the private state used if PS is NULL. */
36 static mbstate_t state;
39 __mbsrtowcs (dst, src, len, ps)
45 struct __gconv_step_data data;
48 struct __gconv_step *towc;
49 size_t non_reversible;
51 /* Tell where we want the result. */
52 data.__invocation_counter = 0;
53 data.__internal_use = 1;
54 data.__flags = __GCONV_IS_LAST;
55 data.__statep = ps ?: &state;
57 /* Make sure we use the correct function. */
58 update_conversion_ptrs ();
60 /* Get the structure with the function pointers. */
61 towc = __wcsmbs_gconv_fcts.towc;
63 /* We have to handle DST == NULL special. */
67 wchar_t buf[64]; /* Just an arbitrary size. */
68 const unsigned char *inbuf = (const unsigned char *) *src;
69 const unsigned char *srcend = inbuf + strlen (inbuf) + 1;
71 temp_state = *data.__statep;
72 data.__statep = &temp_state;
75 data.__outbufend = (char *) buf + sizeof (buf);
78 data.__outbuf = (char *) buf;
80 status = DL_CALL_FCT (towc->__fct,
81 (towc, &data, &inbuf, srcend, data.__outbuf,
82 &non_reversible, 0, 1));
84 result += (wchar_t *) data.__outbuf - buf;
86 while (status == __GCONV_FULL_OUTPUT);
88 if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)
90 /* There better should be a NUL wide char at the end. */
91 assert (((wchar_t *) data.__outbuf)[-1] == L'\0');
92 /* Don't count the NUL character in. */
98 /* This code is based on the safe assumption that all internal
99 multi-byte encodings use the NUL byte only to mark the end
101 const unsigned char *srcend;
103 srcend = (const unsigned char *) (*src
104 + __strnlen (*src, len * MB_CUR_MAX)
107 data.__outbuf = (unsigned char *) dst;
108 data.__outbufend = data.__outbuf + len * sizeof (wchar_t);
110 status = DL_CALL_FCT (towc->__fct,
111 (towc, &data, (const unsigned char **) src, srcend,
112 data.__outbuf, &non_reversible, 0, 1));
114 result = (wchar_t *) data.__outbuf - dst;
116 /* We have to determine whether the last character converted
117 is the NUL character. */
118 if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)
119 && ((wchar_t *) dst)[result - 1] == L'\0')
122 assert (__mbsinit (data.__statep));
128 /* There must not be any problems with the conversion but illegal input
130 assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
131 || status == __GCONV_ILLEGAL_INPUT
132 || status == __GCONV_INCOMPLETE_INPUT
133 || status == __GCONV_FULL_OUTPUT);
135 if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
136 && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT)
138 result = (size_t) -1;
139 __set_errno (EILSEQ);
144 weak_alias (__mbsrtowcs, mbsrtowcs)