1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _BIONIC_MBSTATE_H
30 #define _BIONIC_MBSTATE_H
31
32 #include <errno.h>
33 #include <wchar.h>
34
35 __BEGIN_DECLS
36
37 /*
38 * These return values are specified by POSIX for multibyte conversion
39 * functions.
40 */
41 #define __MB_ERR_ILLEGAL_SEQUENCE static_cast<size_t>(-1)
42 #define __MB_ERR_INCOMPLETE_SEQUENCE static_cast<size_t>(-2)
43
44 #define __MB_IS_ERR(rv) (rv == __MB_ERR_ILLEGAL_SEQUENCE || \
45 rv == __MB_ERR_INCOMPLETE_SEQUENCE)
46
mbstate_bytes_so_far(const mbstate_t * ps)47 static inline __wur size_t mbstate_bytes_so_far(const mbstate_t* ps) {
48 return
49 (ps->__seq[2] != 0) ? 3 :
50 (ps->__seq[1] != 0) ? 2 :
51 (ps->__seq[0] != 0) ? 1 : 0;
52 }
53
mbstate_set_byte(mbstate_t * ps,int i,char byte)54 static inline void mbstate_set_byte(mbstate_t* ps, int i, char byte) {
55 ps->__seq[i] = static_cast<uint8_t>(byte);
56 }
57
mbstate_get_byte(const mbstate_t * ps,int n)58 static inline __wur uint8_t mbstate_get_byte(const mbstate_t* ps, int n) {
59 return ps->__seq[n];
60 }
61
mbstate_reset_and_return_illegal(int _errno,mbstate_t * ps)62 static inline __wur size_t mbstate_reset_and_return_illegal(int _errno, mbstate_t* ps) {
63 errno = _errno;
64 *(reinterpret_cast<uint32_t*>(ps->__seq)) = 0;
65 return __MB_ERR_ILLEGAL_SEQUENCE;
66 }
67
mbstate_reset_and_return(int _return,mbstate_t * ps)68 static inline __wur size_t mbstate_reset_and_return(int _return, mbstate_t* ps) {
69 *(reinterpret_cast<uint32_t*>(ps->__seq)) = 0;
70 return _return;
71 }
72
73 __END_DECLS
74
75 #endif // _BIONIC_MBSTATE_H
76