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 #define __MB_IS_ERR(rv) \
38 (rv == BIONIC_MULTIBYTE_RESULT_ILLEGAL_SEQUENCE || \
39 rv == BIONIC_MULTIBYTE_RESULT_INCOMPLETE_SEQUENCE)
40
mbstate_is_initial(const mbstate_t * ps)41 static inline __wur bool mbstate_is_initial(const mbstate_t* ps) {
42 return *(reinterpret_cast<const uint32_t*>(ps->__seq)) == 0;
43 }
44
mbstate_bytes_so_far(const mbstate_t * ps)45 static inline __wur size_t mbstate_bytes_so_far(const mbstate_t* ps) {
46 return
47 (ps->__seq[2] != 0) ? 3 :
48 (ps->__seq[1] != 0) ? 2 :
49 (ps->__seq[0] != 0) ? 1 : 0;
50 }
51
mbstate_set_byte(mbstate_t * ps,int i,char byte)52 static inline void mbstate_set_byte(mbstate_t* ps, int i, char byte) {
53 ps->__seq[i] = static_cast<uint8_t>(byte);
54 }
55
mbstate_get_byte(const mbstate_t * ps,int n)56 static inline __wur uint8_t mbstate_get_byte(const mbstate_t* ps, int n) {
57 return ps->__seq[n];
58 }
59
mbstate_reset(mbstate_t * ps)60 static inline void mbstate_reset(mbstate_t* ps) {
61 *(reinterpret_cast<uint32_t*>(ps->__seq)) = 0;
62 }
63
mbstate_reset_and_return_illegal(int _errno,mbstate_t * ps)64 static inline __wur size_t mbstate_reset_and_return_illegal(int _errno, mbstate_t* ps) {
65 errno = _errno;
66 mbstate_reset(ps);
67 return BIONIC_MULTIBYTE_RESULT_ILLEGAL_SEQUENCE;
68 }
69
mbstate_reset_and_return(size_t _return,mbstate_t * ps)70 static inline __wur size_t mbstate_reset_and_return(size_t _return, mbstate_t* ps) {
71 mbstate_reset(ps);
72 return _return;
73 }
74
75 __END_DECLS
76
77 #endif // _BIONIC_MBSTATE_H
78