1 /* 2 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 4 * Copyright (c) 2004 Tim J. Robbins. All rights reserved. 5 * Copyright (c) 2003 David Xu <davidxu@freebsd.org> 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 "lint.h" 31 #include <sys/types.h> 32 #include <errno.h> 33 #include "runetype.h" 34 #include <stdlib.h> 35 #include <string.h> 36 #include <wchar.h> 37 #include "mblocal.h" 38 #include "lctype.h" 39 40 static size_t _GB2312_mbrtowc(wchar_t *_RESTRICT_KYWD, 41 const char *_RESTRICT_KYWD, 42 size_t, mbstate_t *_RESTRICT_KYWD); 43 static int _GB2312_mbsinit(const mbstate_t *); 44 static size_t _GB2312_wcrtomb(char *_RESTRICT_KYWD, wchar_t, 45 mbstate_t *_RESTRICT_KYWD); 46 static size_t _GB2312_mbsnrtowcs(wchar_t *_RESTRICT_KYWD, 47 const char **_RESTRICT_KYWD, size_t, size_t, 48 mbstate_t *_RESTRICT_KYWD); 49 static size_t _GB2312_wcsnrtombs(char *_RESTRICT_KYWD, 50 const wchar_t **_RESTRICT_KYWD, size_t, size_t, 51 mbstate_t *_RESTRICT_KYWD); 52 53 54 typedef struct { 55 int count; 56 uchar_t bytes[2]; 57 } _GB2312State; 58 59 void 60 _GB2312_init(struct lc_ctype *lct) 61 { 62 63 lct->lc_mbrtowc = _GB2312_mbrtowc; 64 lct->lc_wcrtomb = _GB2312_wcrtomb; 65 lct->lc_mbsinit = _GB2312_mbsinit; 66 lct->lc_mbsnrtowcs = _GB2312_mbsnrtowcs; 67 lct->lc_wcsnrtombs = _GB2312_wcsnrtombs; 68 lct->lc_max_mblen = 2; 69 lct->lc_is_ascii = 0; 70 } 71 72 static int 73 _GB2312_mbsinit(const mbstate_t *ps) 74 { 75 76 return (ps == NULL || ((const _GB2312State *)ps)->count == 0); 77 } 78 79 static int 80 _GB2312_check(const char *str, size_t n) 81 { 82 const uchar_t *s = (const uchar_t *)str; 83 84 if (n == 0) 85 /* Incomplete multibyte sequence */ 86 return (-2); 87 if (s[0] >= 0xa1 && s[0] <= 0xfe) { 88 if (n < 2) 89 /* Incomplete multibyte sequence */ 90 return (-2); 91 if (s[1] < 0xa1 || s[1] > 0xfe) 92 /* Invalid multibyte sequence */ 93 return (-1); 94 return (2); 95 } else if (s[0] & 0x80) { 96 /* Invalid multibyte sequence */ 97 return (-1); 98 } 99 return (1); 100 } 101 102 static size_t 103 _GB2312_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, 104 size_t n, mbstate_t *_RESTRICT_KYWD ps) 105 { 106 _GB2312State *gs; 107 wchar_t wc; 108 int i, len, ocount; 109 size_t ncopy; 110 111 gs = (_GB2312State *)ps; 112 113 if (gs->count < 0 || gs->count > sizeof (gs->bytes)) { 114 errno = EINVAL; 115 return ((size_t)-1); 116 } 117 118 if (s == NULL) { 119 s = ""; 120 n = 1; 121 pwc = NULL; 122 } 123 124 ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof (gs->bytes) - gs->count); 125 (void) memcpy(gs->bytes + gs->count, s, ncopy); 126 ocount = gs->count; 127 gs->count += ncopy; 128 s = (char *)gs->bytes; 129 n = gs->count; 130 131 if ((len = _GB2312_check(s, n)) < 0) 132 return ((size_t)len); 133 wc = 0; 134 i = len; 135 while (i-- > 0) 136 wc = (wc << 8) | (unsigned char)*s++; 137 if (pwc != NULL) 138 *pwc = wc; 139 gs->count = 0; 140 return (wc == L'\0' ? 0 : len - ocount); 141 } 142 143 static size_t 144 _GB2312_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc, 145 mbstate_t *_RESTRICT_KYWD ps) 146 { 147 _GB2312State *gs; 148 149 gs = (_GB2312State *)ps; 150 151 if (gs->count != 0) { 152 errno = EINVAL; 153 return ((size_t)-1); 154 } 155 156 if (s == NULL) 157 /* Reset to initial shift state (no-op) */ 158 return (1); 159 if (wc & 0x8000) { 160 *s++ = (wc >> 8) & 0xff; 161 *s = wc & 0xff; 162 return (2); 163 } 164 *s = wc & 0xff; 165 return (1); 166 } 167 168 static size_t 169 _GB2312_mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst, 170 const char **_RESTRICT_KYWD src, size_t nms, size_t len, 171 mbstate_t *_RESTRICT_KYWD ps) 172 { 173 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _GB2312_mbrtowc)); 174 } 175 176 static size_t 177 _GB2312_wcsnrtombs(char *_RESTRICT_KYWD dst, 178 const wchar_t **_RESTRICT_KYWD src, size_t nwc, size_t len, 179 mbstate_t *_RESTRICT_KYWD ps) 180 { 181 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _GB2312_wcrtomb)); 182 } 183