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 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 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 58 static inline __wur uint8_t mbstate_get_byte(const mbstate_t* ps, int n) { 59 return ps->__seq[n]; 60 } 61 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 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
