citrus_euctw.c revision 1.1.2.3
1 /* $NetBSD: citrus_euctw.c,v 1.1.2.3 2002/04/25 04:01:40 nathanw 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)1999 Citrus Project, 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 42 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 45 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * 54 * $Citrus: xpg4dl/FreeBSD/lib/libc/locale/euctw.c,v 1.13 2001/06/21 01:51:44 yamt Exp $ 55 */ 56 57 #include <sys/cdefs.h> 58 #if defined(LIBC_SCCS) && !defined(lint) 59 __RCSID("$NetBSD: citrus_euctw.c,v 1.1.2.3 2002/04/25 04:01:40 nathanw Exp $"); 60 #endif /* LIBC_SCCS and not lint */ 61 62 #include <assert.h> 63 #include <errno.h> 64 #include <string.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <stddef.h> 68 #include <locale.h> 69 #include <wchar.h> 70 #include <sys/types.h> 71 #include <limits.h> 72 #include "citrus_module.h" 73 #include "citrus_ctype.h" 74 #include "citrus_euctw.h" 75 76 77 /* ---------------------------------------------------------------------- 78 * private stuffs used by templates 79 */ 80 81 typedef struct { 82 char ch[4]; 83 int chlen; 84 } _EUCTWState; 85 86 typedef struct { 87 int dummy; 88 } _EUCTWEncodingInfo; 89 typedef struct { 90 _EUCTWEncodingInfo ei; 91 struct { 92 /* for future multi-locale facility */ 93 _EUCTWState s_mblen; 94 _EUCTWState s_mbrlen; 95 _EUCTWState s_mbrtowc; 96 _EUCTWState s_mbtowc; 97 _EUCTWState s_mbsrtowcs; 98 _EUCTWState s_wcrtomb; 99 _EUCTWState s_wcsrtombs; 100 _EUCTWState s_wctomb; 101 } states; 102 } _EUCTWCTypeInfo; 103 104 #define _SS2 0x008e 105 #define _SS3 0x008f 106 107 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 108 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 109 110 #define _FUNCNAME(m) _citrus_EUCTW_##m 111 #define _ENCODING_INFO _EUCTWEncodingInfo 112 #define _CTYPE_INFO _EUCTWCTypeInfo 113 #define _ENCODING_STATE _EUCTWState 114 #define _ENCODING_MB_CUR_MAX(_ei_) 4 115 #define _ENCODING_IS_STATE_DEPENDENT 0 116 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 117 118 static __inline int 119 _citrus_EUCTW_cs(u_int c) 120 { 121 c &= 0xff; 122 123 return ((c & 0x80) ? (c == _SS2 ? 2 : 1) : 0); 124 } 125 126 static __inline int 127 _citrus_EUCTW_count(int cs) 128 { 129 switch (cs) { 130 case 0: 131 return 1; 132 case 1: 133 return 2; 134 case 2: 135 return 4; 136 case 3: 137 abort(); 138 /*NOTREACHED*/ 139 } 140 return 0; 141 } 142 143 static __inline void 144 /*ARGSUSED*/ 145 _citrus_EUCTW_init_state(_EUCTWEncodingInfo * __restrict ei, 146 _EUCTWState * __restrict s) 147 { 148 memset(s, 0, sizeof(*s)); 149 } 150 151 static __inline void 152 /*ARGSUSED*/ 153 _citrus_EUCTW_pack_state(_EUCTWEncodingInfo * __restrict ei, 154 void * __restrict pspriv, 155 const _EUCTWState * __restrict s) 156 { 157 memcpy(pspriv, (const void *)s, sizeof(*s)); 158 } 159 160 static __inline void 161 /*ARGSUSED*/ 162 _citrus_EUCTW_unpack_state(_EUCTWEncodingInfo * __restrict ei, 163 _EUCTWState * __restrict s, 164 const void * __restrict pspriv) 165 { 166 memcpy((void *)s, pspriv, sizeof(*s)); 167 } 168 169 static int 170 /*ARGSUSED*/ 171 _citrus_EUCTW_stdencoding_init(_EUCTWEncodingInfo * __restrict ei, 172 const void * __restrict var, size_t lenvar) 173 { 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_EUCTW_stdencoding_uninit(_EUCTWEncodingInfo *ei) 185 { 186 } 187 188 static int 189 _citrus_EUCTW_mbrtowc_priv(_EUCTWEncodingInfo * __restrict ei, 190 wchar_t * __restrict pwc, 191 const char ** __restrict s, 192 size_t n, _EUCTWState * __restrict psenc, 193 size_t * __restrict nresult) 194 { 195 wchar_t wchar; 196 int c, cs; 197 int chlenbak; 198 const char *s0; 199 200 _DIAGASSERT(nresult != 0); 201 _DIAGASSERT(ei != NULL); 202 _DIAGASSERT(psenc != NULL); 203 _DIAGASSERT(s != NULL); 204 205 s0 = *s; 206 207 if (s0 == NULL) { 208 _citrus_EUCTW_init_state(ei, psenc); 209 *nresult = 0; /* state independent */ 210 return (0); 211 } 212 213 /* make sure we have the first byte in the buffer */ 214 switch (psenc->chlen) { 215 case 0: 216 if (n < 1) 217 goto restart; 218 psenc->ch[0] = *s0++; 219 psenc->chlen = 1; 220 n--; 221 break; 222 case 1: 223 case 2: 224 break; 225 default: 226 /* illgeal state */ 227 goto ilseq; 228 } 229 230 c = _citrus_EUCTW_count(cs = _citrus_EUCTW_cs(psenc->ch[0] & 0xff)); 231 if (c == 0) 232 goto ilseq; 233 while (psenc->chlen < c) { 234 if (n < 1) 235 goto ilseq; 236 psenc->ch[psenc->chlen] = *s0++; 237 psenc->chlen++; 238 n--; 239 } 240 241 wchar = 0; 242 switch (cs) { 243 case 0: 244 if (psenc->ch[0] & 0x80) 245 goto ilseq; 246 wchar = psenc->ch[0] & 0xff; 247 break; 248 case 1: 249 if (!(psenc->ch[0] & 0x80) || !(psenc->ch[1] & 0x80)) 250 goto ilseq; 251 wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff); 252 wchar |= 'G' << 24; 253 break; 254 case 2: 255 if ((u_char)psenc->ch[1] < 0xa1 || 0xa7 < (u_char)psenc->ch[1]) 256 goto ilseq; 257 if (!(psenc->ch[2] & 0x80) || !(psenc->ch[3] & 0x80)) 258 goto ilseq; 259 wchar = ((psenc->ch[2] & 0xff) << 8) | (psenc->ch[3] & 0xff); 260 wchar |= ('G' + psenc->ch[1] - 0xa1) << 24; 261 break; 262 default: 263 goto ilseq; 264 } 265 266 *s = s0; 267 psenc->chlen = 0; 268 269 if (pwc) 270 *pwc = wchar; 271 272 if (!wchar) 273 *nresult = 0; 274 else 275 *nresult = c - chlenbak; 276 277 return (0); 278 279 ilseq: 280 psenc->chlen = 0; 281 *nresult = (size_t)-1; 282 return (EILSEQ); 283 284 restart: 285 *s = s0; 286 *nresult = (size_t)-1; 287 return (0); 288 } 289 290 static int 291 _citrus_EUCTW_wcrtomb_priv(_EUCTWEncodingInfo * __restrict ei, 292 char * __restrict s, size_t n, wchar_t wc, 293 _EUCTWState * __restrict psenc, 294 size_t * __restrict nresult) 295 { 296 wchar_t cs = wc & 0x7f000080; 297 wchar_t v; 298 int i, len, clen; 299 300 _DIAGASSERT(ei != NULL); 301 _DIAGASSERT(nresult != 0); 302 _DIAGASSERT(s != NULL); 303 304 clen = 1; 305 if (wc & 0x00007f00) 306 clen = 2; 307 if ((wc & 0x007f0000) && !(wc & 0x00800000)) 308 clen = 3; 309 310 if (clen == 1 && cs == 0x00000000) { 311 /* ASCII */ 312 len = 1; 313 if (n < len) 314 goto ilseq; 315 v = wc & 0x0000007f; 316 } else if (clen == 2 && cs == ('G' << 24)) { 317 /* CNS-11643-1 */ 318 len = 2; 319 if (n < len) 320 goto ilseq; 321 v = wc & 0x00007f7f; 322 v |= 0x00008080; 323 } else if (clen == 2 && 'H' <= (cs >> 24) && (cs >> 24) <= 'M') { 324 /* CNS-11643-[2-7] */ 325 len = 4; 326 if (n < len) 327 goto ilseq; 328 *s++ = _SS2; 329 *s++ = (cs >> 24) - 'H' + 0xa2; 330 v = wc & 0x00007f7f; 331 v |= 0x00008080; 332 } else 333 goto ilseq; 334 335 i = clen; 336 while (i-- > 0) 337 *s++ = (v >> (i << 3)) & 0xff; 338 339 *nresult = len; 340 return (0); 341 342 ilseq: 343 *nresult = (size_t)-1; 344 return (EILSEQ); 345 } 346 347 /* ---------------------------------------------------------------------- 348 * public interface for ctype 349 */ 350 351 _CITRUS_CTYPE_DECLS(EUCTW); 352 _CITRUS_CTYPE_DEF_OPS(EUCTW); 353 354 #include "citrus_ctype_template.h" 355
Indexes created Mon Oct 20 20:10:13 GMT 2025