1 /* $OpenBSD: citrus_none.c,v 1.9 2016/09/07 17:10:43 schwarze Exp $ */ 2 /* $NetBSD: citrus_none.c,v 1.18 2008/06/14 16:01:07 tnozaki Exp $ */ 3 4 /*- 5 * Copyright (c)2002 Citrus Project, 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/types.h> 31 32 #include <errno.h> 33 #include <string.h> 34 #include <wchar.h> 35 36 #include "citrus_ctype.h" 37 38 static char wrapv(unsigned char); 39 40 41 /* 42 * Convert an unsigned char value into a char value without relying on 43 * signed overflow behavior. 44 */ 45 static char 46 wrapv(unsigned char ch) 47 { 48 if (ch >= 0x80) 49 return (int)ch - 0x100; 50 else 51 return ch; 52 } 53 54 size_t 55 _citrus_none_ctype_mbrtowc(wchar_t * __restrict pwc, 56 const char * __restrict s, size_t n) 57 { 58 if (s == NULL) 59 return 0; 60 if (n == 0) 61 return -2; 62 if (pwc != NULL) 63 *pwc = (wchar_t)(unsigned char)*s; 64 return *s != '\0'; 65 } 66 67 size_t 68 _citrus_none_ctype_mbsnrtowcs(wchar_t * __restrict dst, 69 const char ** __restrict src, size_t nmc, size_t len) 70 { 71 size_t i; 72 73 if (dst == NULL) 74 return strnlen(*src, nmc); 75 76 for (i = 0; i < nmc && i < len; i++) 77 if ((dst[i] = (wchar_t)(unsigned char)(*src)[i]) == L'\0') { 78 *src = NULL; 79 return i; 80 } 81 82 *src += i; 83 return i; 84 } 85 86 size_t 87 _citrus_none_ctype_wcrtomb(char * __restrict s, wchar_t wc) 88 { 89 if (s == NULL) 90 return 1; 91 92 if (wc < 0 || wc > 0xff) { 93 errno = EILSEQ; 94 return -1; 95 } 96 97 *s = wrapv(wc); 98 return 1; 99 } 100 101 size_t 102 _citrus_none_ctype_wcsnrtombs(char * __restrict dst, 103 const wchar_t ** __restrict src, size_t nwc, size_t len) 104 { 105 size_t i; 106 107 if (dst == NULL) { 108 for (i = 0; i < nwc; i++) { 109 wchar_t wc = (*src)[i]; 110 if (wc < 0 || wc > 0xff) { 111 errno = EILSEQ; 112 return -1; 113 } 114 if (wc == L'\0') 115 return i; 116 } 117 return i; 118 } 119 120 for (i = 0; i < nwc && i < len; i++) { 121 wchar_t wc = (*src)[i]; 122 if (wc < 0 || wc > 0xff) { 123 *src += i; 124 errno = EILSEQ; 125 return -1; 126 } 127 dst[i] = wrapv(wc); 128 if (wc == L'\0') { 129 *src = NULL; 130 return i; 131 } 132 } 133 *src += i; 134 return i; 135 } 136