citrus_big5.c revision 1.2
1 /* $NetBSD: citrus_big5.c,v 1.2 2002/03/27 15:01:17 yamt Exp $ */ 2 3 /*- 4 * Copyright (c)2002 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /*- 30 * Copyright (c) 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * This code is derived from software contributed to Berkeley by 34 * Paul Borman at Krystal Technologies. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 #include <sys/cdefs.h> 66 #if defined(LIBC_SCCS) && !defined(lint) 67 __RCSID("$NetBSD: citrus_big5.c,v 1.2 2002/03/27 15:01:17 yamt Exp $"); 68 #endif /* LIBC_SCCS and not lint */ 69 70 #include <assert.h> 71 #include <errno.h> 72 #include <string.h> 73 #include <stdio.h> 74 #include <stdlib.h> 75 #include <stddef.h> 76 #include <locale.h> 77 #include <wchar.h> 78 #include <sys/types.h> 79 #include <limits.h> 80 #include "citrus_module.h" 81 #include "citrus_ctype.h" 82 #include "citrus_big5.h" 83 84 /* ---------------------------------------------------------------------- 85 * private stuffs used by templates 86 */ 87 88 typedef struct { 89 char ch[2]; 90 int chlen; 91 } _BIG5State; 92 93 typedef struct { 94 int dummy; 95 } _BIG5EncodingInfo; 96 97 typedef struct { 98 _BIG5EncodingInfo ei; 99 struct { 100 /* for future multi-locale facility */ 101 _BIG5State s_mblen; 102 _BIG5State s_mbrlen; 103 _BIG5State s_mbrtowc; 104 _BIG5State s_mbtowc; 105 _BIG5State s_mbsrtowcs; 106 _BIG5State s_wcrtomb; 107 _BIG5State s_wcsrtombs; 108 _BIG5State s_wcstombs; 109 _BIG5State s_wctomb; 110 } states; 111 } _BIG5CTypeInfo; 112 113 #define _TO_EI(_cl_) ((_BIG5EncodingInfo *)(_cl_)) 114 #define _TO_CEI(_cl_) ((_BIG5CTypeInfo *)(_cl_)) 115 #define _TO_STATE(_ps_) ((_BIG5State *)(_ps_)) 116 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 117 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 118 119 #define _FUNCNAME(m) _citrus_BIG5_##m 120 #define _ENCODING_INFO _BIG5EncodingInfo 121 #define _CTYPE_INFO _BIG5CTypeInfo 122 #define _ENCODING_STATE _BIG5State 123 #define _ENCODING_MB_CUR_MAX(_ei_) 2 124 #define _ENCODING_IS_STATE_DEPENDENT 0 125 126 127 static __inline void 128 /*ARGSUSED*/ 129 _citrus_BIG5_init_state(_BIG5EncodingInfo * __restrict ei, 130 _BIG5State * __restrict s) 131 { 132 memset(s, 0, sizeof(*s)); 133 } 134 135 static __inline void 136 /*ARGSUSED*/ 137 _citrus_BIG5_pack_state(_BIG5EncodingInfo * __restrict ei, 138 void * __restrict pspriv, 139 const _BIG5State * __restrict s) 140 { 141 memcpy(pspriv, (const void *)s, sizeof(*s)); 142 } 143 144 static __inline void 145 /*ARGSUSED*/ 146 _citrus_BIG5_unpack_state(_BIG5EncodingInfo * __restrict ei, 147 _BIG5State * __restrict s, 148 const void * __restrict pspriv) 149 { 150 memcpy((void *)s, pspriv, sizeof(*s)); 151 } 152 153 static __inline int 154 _citrus_BIG5_check(u_int c) 155 { 156 c &= 0xff; 157 return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1); 158 } 159 160 static __inline int 161 _citrus_BIG5_check2(u_int c) 162 { 163 c &= 0xff; 164 if ((c >= 0x40 && c <= 0x7f) || (c >= 0xa1 && c <= 0xfe)) 165 return 1; 166 else 167 return 0; 168 } 169 170 static int 171 /*ARGSUSED*/ 172 _citrus_BIG5_stdencoding_init(_BIG5EncodingInfo * __restrict ei, 173 const void * __restrict var, size_t lenvar) 174 { 175 _DIAGASSERT(ei != NULL); 176 177 memset((void *)ei, 0, sizeof(*ei)); 178 179 return (0); 180 } 181 182 static void 183 /*ARGSUSED*/ 184 _citrus_BIG5_stdencoding_uninit(_BIG5EncodingInfo *ei) 185 { 186 } 187 188 static int 189 /*ARGSUSED*/ 190 _citrus_BIG5_mbrtowc_priv(_BIG5EncodingInfo * __restrict ei, 191 wchar_t * __restrict pwc, 192 const char ** __restrict s, size_t n, 193 _BIG5State * __restrict psenc, 194 size_t * __restrict nresult) 195 { 196 wchar_t wchar; 197 int c; 198 int chlenbak; 199 const char *s0; 200 201 _DIAGASSERT(nresult != 0); 202 _DIAGASSERT(ei != NULL); 203 _DIAGASSERT(psenc != NULL); 204 _DIAGASSERT(s != NULL && *s != NULL); 205 206 s0 = *s; 207 208 if (s0 == NULL) { 209 _citrus_BIG5_init_state(ei, psenc); 210 *nresult = 0; 211 return (0); 212 } 213 214 chlenbak = psenc->chlen; 215 216 /* make sure we have the first byte in the buffer */ 217 switch (psenc->chlen) { 218 case 0: 219 if (n < 1) 220 goto restart; 221 psenc->ch[0] = *s0++; 222 psenc->chlen = 1; 223 n--; 224 break; 225 case 1: 226 break; 227 default: 228 /* illegal state */ 229 goto ilseq; 230 } 231 232 c = _citrus_BIG5_check(psenc->ch[0] & 0xff); 233 if (c == 0) 234 goto ilseq; 235 while (psenc->chlen < c) { 236 if (n < 1) { 237 goto restart; 238 } 239 psenc->ch[psenc->chlen] = *s0++; 240 psenc->chlen++; 241 n--; 242 } 243 244 switch (c) { 245 case 1: 246 wchar = psenc->ch[0] & 0xff; 247 break; 248 case 2: 249 if (!_citrus_BIG5_check2(psenc->ch[1] & 0xff)) 250 goto ilseq; 251 wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff); 252 break; 253 default: 254 /* illegal state */ 255 goto ilseq; 256 } 257 258 *s = s0; 259 psenc->chlen = 0; 260 if (pwc) 261 *pwc = wchar; 262 if (!wchar) 263 *nresult = 0; 264 else 265 *nresult = c - chlenbak; 266 267 return (0); 268 269 ilseq: 270 psenc->chlen = 0; 271 *nresult = (size_t)-1; 272 return (EILSEQ); 273 274 restart: 275 *s = s0; 276 *nresult = (size_t)-2; 277 return (0); 278 } 279 280 static int 281 /*ARGSUSED*/ 282 _citrus_BIG5_wcrtomb_priv(_BIG5EncodingInfo * __restrict ei, 283 char * __restrict s, 284 size_t n, wchar_t wc, _BIG5State * __restrict psenc, 285 size_t * __restrict nresult) 286 { 287 int l; 288 289 _DIAGASSERT(ei != NULL); 290 _DIAGASSERT(nresult != 0); 291 _DIAGASSERT(s != NULL); 292 293 /* check invalid sequence */ 294 if (wc & ~0xffff) 295 goto ilseq; 296 297 if (wc & 0x8000) { 298 if (_citrus_BIG5_check((wc >> 8) & 0xff) != 2 || 299 !_citrus_BIG5_check2(wc & 0xff)) 300 goto ilseq; 301 l = 2; 302 } else { 303 if (wc & ~0xff || !_citrus_BIG5_check(wc & 0xff)) 304 goto ilseq; 305 l = 1; 306 } 307 308 if (n < l) { 309 /* bound check failure */ 310 goto ilseq; 311 } 312 313 if (l == 2) { 314 s[0] = (wc >> 8) & 0xff; 315 s[1] = wc & 0xff; 316 } else 317 s[0] = wc & 0xff; 318 319 *nresult = l; 320 321 return (0); 322 323 ilseq: 324 *nresult = (size_t)-1; 325 return (EILSEQ); 326 } 327 328 329 /* ---------------------------------------------------------------------- 330 * public interface for ctype 331 */ 332 333 _CITRUS_CTYPE_DECLS(BIG5); 334 _CITRUS_CTYPE_DEF_OPS(BIG5); 335 336 #include "citrus_ctype_template.h" 337
Indexes created Fri Sep 26 20:09:58 GMT 2025