1 /* Copyright (C) 2011-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
24 #include <wcsmbsload.h>
29 # define EILSEQ EINVAL
33 /* This is the private state used if PS is NULL. */
34 static mbstate_t state;
37 mbrtoc16 (char16_t *pc16, const char *s, size_t n, mbstate_t *ps)
42 /* The standard text does not say that S being NULL means the state
43 is reset even if the second half of a surrogate still have to be
44 returned. In fact, the error code description indicates
45 otherwise. Therefore always first try to return a second
47 if (ps->__count & 0x80000000)
49 /* We have to return the second word for a surrogate. */
50 ps->__count &= 0x7fffffff;
51 *pc16 = ps->__value.__wch;
52 ps->__value.__wch = L'\0';
57 struct __gconv_step_data data;
61 const unsigned char *inbuf, *endbuf;
62 unsigned char *outbuf = (unsigned char *) &wc;
63 const struct gconv_fcts *fcts;
65 /* Set information for this step. */
66 data.__invocation_counter = 0;
67 data.__internal_use = 1;
68 data.__flags = __GCONV_IS_LAST;
71 /* A first special case is if S is NULL. This means put PS in the
80 /* Tell where we want the result. */
81 data.__outbuf = outbuf;
82 data.__outbufend = outbuf + sizeof (wchar_t);
84 /* Get the conversion functions. */
85 fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
87 /* Do a normal conversion. */
88 inbuf = (const unsigned char *) s;
90 if (__glibc_unlikely (endbuf < inbuf))
92 endbuf = (const unsigned char *) ~(uintptr_t) 0;
96 __gconv_fct fct = fcts->towc->__fct;
98 if (fcts->towc->__shlib_handle != NULL)
102 status = DL_CALL_FCT (fct, (fcts->towc, &data, &inbuf, endbuf,
103 NULL, &dummy, 0, 1));
105 /* There must not be any problems with the conversion but illegal input
106 characters. The output buffer must be large enough, otherwise the
107 definition of MB_CUR_MAX is not correct. All the other possible
108 errors also must not happen. */
109 assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
110 || status == __GCONV_ILLEGAL_INPUT
111 || status == __GCONV_INCOMPLETE_INPUT
112 || status == __GCONV_FULL_OUTPUT);
114 if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
115 || status == __GCONV_FULL_OUTPUT)
117 result = inbuf - (const unsigned char *) s;
124 if (data.__outbuf != outbuf && wc == L'\0')
126 /* The converted character is the NUL character. */
127 assert (__mbsinit (data.__statep));
133 /* This is a surrogate. */
135 *pc16 = 0xd7c0 + (wc >> 10);
137 ps->__count |= 0x80000000;
138 ps->__value.__wch = 0xdc00 + (wc & 0x3ff);
141 else if (status == __GCONV_INCOMPLETE_INPUT)
142 result = (size_t) -2;
146 result = (size_t) -1;
147 __set_errno (EILSEQ);