1 /* $NetBSD: citrus_johab.c,v 1.4 2008/06/14 16:01:07 tnozaki Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c)2006 Citrus Project, 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/types.h> 32 33 #include <assert.h> 34 #include <errno.h> 35 #include <limits.h> 36 #include <stdbool.h> 37 #include <stddef.h> 38 #include <stdint.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <wchar.h> 43 44 #include "citrus_namespace.h" 45 #include "citrus_types.h" 46 #include "citrus_bcs.h" 47 #include "citrus_module.h" 48 #include "citrus_stdenc.h" 49 #include "citrus_johab.h" 50 51 /* ---------------------------------------------------------------------- 52 * private stuffs used by templates 53 */ 54 55 typedef struct { 56 int chlen; 57 char ch[2]; 58 } _JOHABState; 59 60 typedef struct { 61 int dummy; 62 } _JOHABEncodingInfo; 63 64 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 65 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 66 67 #define _FUNCNAME(m) _citrus_JOHAB_##m 68 #define _ENCODING_INFO _JOHABEncodingInfo 69 #define _ENCODING_STATE _JOHABState 70 #define _ENCODING_MB_CUR_MAX(_ei_) 2 71 #define _ENCODING_IS_STATE_DEPENDENT 0 72 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 73 74 75 static __inline void 76 /*ARGSUSED*/ 77 _citrus_JOHAB_init_state(_JOHABEncodingInfo * __restrict ei __unused, 78 _JOHABState * __restrict psenc) 79 { 80 81 psenc->chlen = 0; 82 } 83 84 #if 0 85 static __inline void 86 /*ARGSUSED*/ 87 _citrus_JOHAB_pack_state(_JOHABEncodingInfo * __restrict ei __unused, 88 void * __restrict pspriv, const _JOHABState * __restrict psenc) 89 { 90 91 memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); 92 } 93 94 static __inline void 95 /*ARGSUSED*/ 96 _citrus_JOHAB_unpack_state(_JOHABEncodingInfo * __restrict ei __unused, 97 _JOHABState * __restrict psenc, const void * __restrict pspriv) 98 { 99 100 memcpy((void *)psenc, pspriv, sizeof(*psenc)); 101 } 102 #endif 103 104 static void 105 /*ARGSUSED*/ 106 _citrus_JOHAB_encoding_module_uninit(_JOHABEncodingInfo *ei __unused) 107 { 108 109 /* ei may be null */ 110 } 111 112 static int 113 /*ARGSUSED*/ 114 _citrus_JOHAB_encoding_module_init(_JOHABEncodingInfo * __restrict ei __unused, 115 const void * __restrict var __unused, size_t lenvar __unused) 116 { 117 118 /* ei may be null */ 119 return (0); 120 } 121 122 static __inline bool 123 ishangul(int l, int t) 124 { 125 126 return ((l >= 0x84 && l <= 0xD3) && 127 ((t >= 0x41 && t <= 0x7E) || (t >= 0x81 && t <= 0xFE))); 128 } 129 130 static __inline bool 131 isuda(int l, int t) 132 { 133 134 return ((l == 0xD8) && 135 ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE))); 136 } 137 138 static __inline bool 139 ishanja(int l, int t) 140 { 141 142 return (((l >= 0xD9 && l <= 0xDE) || (l >= 0xE0 && l <= 0xF9)) && 143 ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE))); 144 } 145 146 static int 147 /*ARGSUSED*/ 148 _citrus_JOHAB_mbrtowc_priv(_JOHABEncodingInfo * __restrict ei, 149 wchar_t * __restrict pwc, char ** __restrict s, size_t n, 150 _JOHABState * __restrict psenc, size_t * __restrict nresult) 151 { 152 char *s0; 153 int l, t; 154 155 if (*s == NULL) { 156 _citrus_JOHAB_init_state(ei, psenc); 157 *nresult = _ENCODING_IS_STATE_DEPENDENT; 158 return (0); 159 } 160 s0 = *s; 161 162 switch (psenc->chlen) { 163 case 0: 164 if (n-- < 1) 165 goto restart; 166 l = *s0++ & 0xFF; 167 if (l <= 0x7F) { 168 if (pwc != NULL) 169 *pwc = (wchar_t)l; 170 *nresult = (l == 0) ? 0 : 1; 171 *s = s0; 172 return (0); 173 } 174 psenc->ch[psenc->chlen++] = l; 175 break; 176 case 1: 177 l = psenc->ch[0] & 0xFF; 178 break; 179 default: 180 return (EINVAL); 181 } 182 if (n-- < 1) { 183 restart: 184 *nresult = (size_t)-2; 185 *s = s0; 186 return (0); 187 } 188 t = *s0++ & 0xFF; 189 if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t)) { 190 *nresult = (size_t)-1; 191 return (EILSEQ); 192 } 193 if (pwc != NULL) 194 *pwc = (wchar_t)(l << 8 | t); 195 *nresult = s0 - *s; 196 *s = s0; 197 psenc->chlen = 0; 198 199 return (0); 200 } 201 202 static int 203 /*ARGSUSED*/ 204 _citrus_JOHAB_wcrtomb_priv(_JOHABEncodingInfo * __restrict ei __unused, 205 char * __restrict s, size_t n, wchar_t wc, 206 _JOHABState * __restrict psenc, size_t * __restrict nresult) 207 { 208 int l, t; 209 210 if (psenc->chlen != 0) 211 return (EINVAL); 212 213 /* XXX assume wchar_t as int */ 214 if ((uint32_t)wc <= 0x7F) { 215 if (n < 1) 216 goto e2big; 217 *s = wc & 0xFF; 218 *nresult = 1; 219 } else if ((uint32_t)wc <= 0xFFFF) { 220 if (n < 2) { 221 e2big: 222 *nresult = (size_t)-1; 223 return (E2BIG); 224 } 225 l = (wc >> 8) & 0xFF; 226 t = wc & 0xFF; 227 if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t)) 228 goto ilseq; 229 *s++ = l; 230 *s = t; 231 *nresult = 2; 232 } else { 233 ilseq: 234 *nresult = (size_t)-1; 235 return (EILSEQ); 236 } 237 return (0); 238 239 } 240 241 static __inline int 242 /*ARGSUSED*/ 243 _citrus_JOHAB_stdenc_wctocs(_JOHABEncodingInfo * __restrict ei __unused, 244 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) 245 { 246 int m, l, linear, t; 247 248 /* XXX assume wchar_t as int */ 249 if ((uint32_t)wc <= 0x7F) { 250 *idx = (_index_t)wc; 251 *csid = 0; 252 } else if ((uint32_t)wc <= 0xFFFF) { 253 l = (wc >> 8) & 0xFF; 254 t = wc & 0xFF; 255 if (ishangul(l, t) || isuda(l, t)) { 256 *idx = (_index_t)wc; 257 *csid = 1; 258 } else { 259 if (l >= 0xD9 && l <= 0xDE) { 260 linear = l - 0xD9; 261 m = 0x21; 262 } else if (l >= 0xE0 && l <= 0xF9) { 263 linear = l - 0xE0; 264 m = 0x4A; 265 } else 266 return (EILSEQ); 267 linear *= 188; 268 if (t >= 0x31 && t <= 0x7E) 269 linear += t - 0x31; 270 else if (t >= 0x91 && t <= 0xFE) 271 linear += t - 0x43; 272 else 273 return (EILSEQ); 274 l = (linear / 94) + m; 275 t = (linear % 94) + 0x21; 276 *idx = (_index_t)((l << 8) | t); 277 *csid = 2; 278 } 279 } else 280 return (EILSEQ); 281 return (0); 282 } 283 284 static __inline int 285 /*ARGSUSED*/ 286 _citrus_JOHAB_stdenc_cstowc(_JOHABEncodingInfo * __restrict ei __unused, 287 wchar_t * __restrict wc, _csid_t csid, _index_t idx) 288 { 289 int m, n, l, linear, t; 290 291 switch (csid) { 292 case 0: 293 case 1: 294 *wc = (wchar_t)idx; 295 break; 296 case 2: 297 if (idx >= 0x2121 && idx <= 0x2C71) { 298 m = 0xD9; 299 n = 0x21; 300 } else if (idx >= 0x4A21 && idx <= 0x7D7E) { 301 m = 0xE0; 302 n = 0x4A; 303 } else 304 return (EILSEQ); 305 l = ((idx >> 8) & 0xFF) - n; 306 t = (idx & 0xFF) - 0x21; 307 linear = (l * 94) + t; 308 l = (linear / 188) + m; 309 t = linear % 188; 310 t += (t <= 0x4D) ? 0x31 : 0x43; 311 break; 312 default: 313 return (EILSEQ); 314 } 315 return (0); 316 } 317 318 static __inline int 319 /*ARGSUSED*/ 320 _citrus_JOHAB_stdenc_get_state_desc_generic(_JOHABEncodingInfo * __restrict ei __unused, 321 _JOHABState * __restrict psenc, int * __restrict rstate) 322 { 323 324 *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : 325 _STDENC_SDGEN_INCOMPLETE_CHAR; 326 return (0); 327 } 328 329 /* ---------------------------------------------------------------------- 330 * public interface for stdenc 331 */ 332 333 _CITRUS_STDENC_DECLS(JOHAB); 334 _CITRUS_STDENC_DEF_OPS(JOHAB); 335 336 #include "citrus_stdenc_template.h" 337