1 /* Copyright (C) 2011-2019 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
83 /* Tell where we want the result. */
84 data
.__outbuf
= outbuf
;
85 data
.__outbufend
= outbuf
+ sizeof (wchar_t);
87 /* Get the conversion functions. */
88 fcts
= get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE
));
90 /* Do a normal conversion. */
91 inbuf
= (const unsigned char *) s
;
93 if (__glibc_unlikely (endbuf
< inbuf
))
95 endbuf
= (const unsigned char *) ~(uintptr_t) 0;
99 __gconv_fct fct
= fcts
->towc
->__fct
;
101 if (fcts
->towc
->__shlib_handle
!= NULL
)
105 status
= DL_CALL_FCT (fct
, (fcts
->towc
, &data
, &inbuf
, endbuf
,
106 NULL
, &dummy
, 0, 1));
108 /* There must not be any problems with the conversion but illegal input
109 characters. The output buffer must be large enough, otherwise the
110 definition of MB_CUR_MAX is not correct. All the other possible
111 errors also must not happen. */
112 assert (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
113 || status
== __GCONV_ILLEGAL_INPUT
114 || status
== __GCONV_INCOMPLETE_INPUT
115 || status
== __GCONV_FULL_OUTPUT
);
117 if (status
== __GCONV_OK
|| status
== __GCONV_EMPTY_INPUT
118 || status
== __GCONV_FULL_OUTPUT
)
120 result
= inbuf
- (const unsigned char *) s
;
127 if (data
.__outbuf
!= outbuf
&& wc
== L
'\0')
129 /* The converted character is the NUL character. */
130 assert (__mbsinit (data
.__statep
));
136 /* This is a surrogate. */
138 *pc16
= 0xd7c0 + (wc
>> 10);
140 ps
->__count
|= 0x80000000;
141 ps
->__value
.__wch
= 0xdc00 + (wc
& 0x3ff);
144 else if (status
== __GCONV_INCOMPLETE_INPUT
)
145 result
= (size_t) -2;
149 result
= (size_t) -1;
150 __set_errno (EILSEQ
);