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, boolean_t); 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 void 54 _GB2312_init(struct lc_ctype *lct) 55 { 56 57 lct->lc_mbrtowc = _GB2312_mbrtowc; 58 lct->lc_wcrtomb = _GB2312_wcrtomb; 59 lct->lc_mbsinit = _GB2312_mbsinit; 60 lct->lc_mbsnrtowcs = _GB2312_mbsnrtowcs; 61 lct->lc_wcsnrtombs = _GB2312_wcsnrtombs; 62 lct->lc_max_mblen = 2; 63 lct->lc_is_ascii = 0; 64 } 65 66 static int 67 _GB2312_mbsinit(const mbstate_t *ps) 68 { 69 70 return (ps == NULL || ((const _GB2312State *)ps)->count == 0); 71 } 72 73 static int 74 _GB2312_check(const char *str, size_t n) 75 { 76 const uchar_t *s = (const uchar_t *)str; 77 78 if (n == 0) 79 /* Incomplete multibyte sequence */ 80 return (-2); 81 if (s[0] >= 0xa1 && s[0] <= 0xfe) { 82 if (n < 2) 83 /* Incomplete multibyte sequence */ 84 return (-2); 85 if (s[1] < 0xa1 || s[1] > 0xfe) 86 /* Invalid multibyte sequence */ 87 return (-1); 88 return (2); 89 } else if (s[0] & 0x80) { 90 /* Invalid multibyte sequence */ 91 return (-1); 92 } 93 return (1); 94 } 95 96 static size_t 97 _GB2312_mbrtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, 98 size_t n, mbstate_t *_RESTRICT_KYWD ps, boolean_t zero) 99 { 100 _GB2312State *gs; 101 wchar_t wc; 102 int i, len, ocount; 103 size_t ncopy; 104 105 gs = (_GB2312State *)ps; 106 107 if (gs->count < 0 || gs->count > sizeof (gs->bytes)) { 108 errno = EINVAL; 109 return ((size_t)-1); 110 } 111 112 if (s == NULL) { 113 s = ""; 114 n = 1; 115 pwc = NULL; 116 } 117 118 ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof (gs->bytes) - gs->count); 119 (void) memcpy(gs->bytes + gs->count, s, ncopy); 120 ocount = gs->count; 121 gs->count += ncopy; 122 s = (char *)gs->bytes; 123 n = gs->count; 124 125 if ((len = _GB2312_check(s, n)) < 0) 126 return ((size_t)len); 127 wc = 0; 128 i = len; 129 while (i-- > 0) 130 wc = (wc << 8) | (unsigned char)*s++; 131 if (pwc != NULL) 132 *pwc = wc; 133 gs->count = 0; 134 if (zero || wc != L'\0') { 135 return (len - ocount); 136 } else { 137 return (0); 138 } 139 } 140 141 static size_t 142 _GB2312_wcrtomb(char *_RESTRICT_KYWD s, wchar_t wc, 143 mbstate_t *_RESTRICT_KYWD ps) 144 { 145 _GB2312State *gs; 146 147 gs = (_GB2312State *)ps; 148 149 if (gs->count != 0) { 150 errno = EINVAL; 151 return ((size_t)-1); 152 } 153 154 if (s == NULL) 155 /* Reset to initial shift state (no-op) */ 156 return (1); 157 if (wc & 0x8000) { 158 *s++ = (wc >> 8) & 0xff; 159 *s = wc & 0xff; 160 return (2); 161 } 162 *s = wc & 0xff; 163 return (1); 164 } 165 166 static size_t 167 _GB2312_mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst, 168 const char **_RESTRICT_KYWD src, size_t nms, size_t len, 169 mbstate_t *_RESTRICT_KYWD ps) 170 { 171 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _GB2312_mbrtowc)); 172 } 173 174 static size_t 175 _GB2312_wcsnrtombs(char *_RESTRICT_KYWD dst, 176 const wchar_t **_RESTRICT_KYWD src, size_t nwc, size_t len, 177 mbstate_t *_RESTRICT_KYWD ps) 178 { 179 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _GB2312_wcrtomb)); 180 } 181