1#include <iconv.h> 2#include <errno.h> 3#include <wchar.h> 4#include <string.h> 5#include <stdlib.h> 6#include <limits.h> 7#include <stdint.h> 8#include "locale_impl.h" 9 10#define UTF_32BE 0300 11#define UTF_16LE 0301 12#define UTF_16BE 0302 13#define UTF_32LE 0303 14#define UCS2BE 0304 15#define UCS2LE 0305 16#define WCHAR_T 0306 17#define US_ASCII 0307 18#define UTF_8 0310 19#define EUC_JP 0320 20#define SHIFT_JIS 0321 21#define GB18030 0330 22#define GBK 0331 23#define GB2312 0332 24#define BIG5 0340 25#define EUC_KR 0350 26 27/* Definitions of charmaps. Each charmap consists of: 28 * 1. Empty-string-terminated list of null-terminated aliases. 29 * 2. Special type code or number of elided entries. 30 * 3. Character table (size determined by field 2). */ 31 32static const unsigned char charmaps[] = 33"utf8\0char\0\0\310" 34"wchart\0\0\306" 35"ucs2\0ucs2be\0\0\304" 36"ucs2le\0\0\305" 37"utf16\0utf16be\0\0\302" 38"utf16le\0\0\301" 39"ucs4\0ucs4be\0utf32\0utf32be\0\0\300" 40"ucs4le\0utf32le\0\0\303" 41"ascii\0usascii\0iso646\0iso646us\0\0\307" 42"eucjp\0\0\320" 43"shiftjis\0sjis\0\0\321" 44"gb18030\0\0\330" 45"gbk\0\0\331" 46"gb2312\0\0\332" 47"big5\0bigfive\0cp950\0big5hkscs\0\0\340" 48"euckr\0ksc5601\0ksx1001\0cp949\0\0\350" 49#include "codepages.h" 50; 51 52static const unsigned short legacy_chars[] = { 53#include "legacychars.h" 54}; 55 56static const unsigned short jis0208[84][94] = { 57#include "jis0208.h" 58}; 59 60static const unsigned short gb18030[126][190] = { 61#include "gb18030.h" 62}; 63 64static const unsigned short big5[89][157] = { 65#include "big5.h" 66}; 67 68static const unsigned short hkscs[] = { 69#include "hkscs.h" 70}; 71 72static const unsigned short ksc[93][94] = { 73#include "ksc.h" 74}; 75 76static int fuzzycmp(const unsigned char *a, const unsigned char *b) 77{ 78 for (; *a && *b; a++, b++) { 79 while (*a && (*a|32U)-'a'>26 && *a-'0'>10U) a++; 80 if ((*a|32U) != *b) return 1; 81 } 82 return *a != *b; 83} 84 85static size_t find_charmap(const void *name) 86{ 87 const unsigned char *s; 88 if (!*(char *)name) name=charmaps; /* "utf8" */ 89 for (s=charmaps; *s; ) { 90 if (!fuzzycmp(name, s)) { 91 for (; *s; s+=strlen((void *)s)+1); 92 return s+1-charmaps; 93 } 94 s += strlen((void *)s)+1; 95 if (!*s) { 96 if (s[1] > 0200) s+=2; 97 else s+=2+(128U-s[1])/4*5; 98 } 99 } 100 return -1; 101} 102 103iconv_t iconv_open(const char *to, const char *from) 104{ 105 size_t f, t; 106 107 if ((t = find_charmap(to))==-1 108 || (f = find_charmap(from))==-1 109 || (charmaps[t] >= 0320)) { 110 errno = EINVAL; 111 return (iconv_t)-1; 112 } 113 114 return (void *)(f<<16 | t); 115} 116 117int iconv_close(iconv_t cd) 118{ 119 return 0; 120} 121 122static unsigned get_16(const unsigned char *s, int e) 123{ 124 e &= 1; 125 return s[e]<<8 | s[1-e]; 126} 127 128static void put_16(unsigned char *s, unsigned c, int e) 129{ 130 e &= 1; 131 s[e] = c>>8; 132 s[1-e] = c; 133} 134 135static unsigned get_32(const unsigned char *s, int e) 136{ 137 e &= 3; 138 return s[e]+0U<<24 | s[e^1]<<16 | s[e^2]<<8 | s[e^3]; 139} 140 141static void put_32(unsigned char *s, unsigned c, int e) 142{ 143 e &= 3; 144 s[e^0] = c>>24; 145 s[e^1] = c>>16; 146 s[e^2] = c>>8; 147 s[e^3] = c; 148} 149 150/* Adapt as needed */ 151#define mbrtowc_utf8 mbrtowc 152#define wctomb_utf8 wctomb 153 154size_t iconv(iconv_t cd0, char **restrict in, size_t *restrict inb, char **restrict out, size_t *restrict outb) 155{ 156 size_t x=0; 157 unsigned long cd = (unsigned long)cd0; 158 unsigned to = cd & 0xffff; 159 unsigned from = cd >> 16; 160 const unsigned char *map = charmaps+from+1; 161 const unsigned char *tomap = charmaps+to+1; 162 mbstate_t st = {0}; 163 wchar_t wc; 164 unsigned c, d; 165 size_t k, l; 166 int err; 167 unsigned char type = map[-1]; 168 unsigned char totype = tomap[-1]; 169 locale_t *ploc = &CURRENT_LOCALE, loc = *ploc; 170 171 if (!in || !*in || !*inb) return 0; 172 173 *ploc = UTF8_LOCALE; 174 175 for (; *inb; *in+=l, *inb-=l) { 176 c = *(unsigned char *)*in; 177 l = 1; 178 179 if (c >= 128 || type-UTF_32BE < 7U) switch (type) { 180 case UTF_8: 181 l = mbrtowc_utf8(&wc, *in, *inb, &st); 182 if (!l) l++; 183 else if (l == (size_t)-1) goto ilseq; 184 else if (l == (size_t)-2) goto starved; 185 c = wc; 186 break; 187 case US_ASCII: 188 goto ilseq; 189 case WCHAR_T: 190 l = sizeof(wchar_t); 191 if (*inb < l) goto starved; 192 c = *(wchar_t *)*in; 193 if (0) { 194 case UTF_32BE: 195 case UTF_32LE: 196 l = 4; 197 if (*inb < 4) goto starved; 198 c = get_32((void *)*in, type); 199 } 200 if (c-0xd800u < 0x800u || c >= 0x110000u) goto ilseq; 201 break; 202 case UCS2BE: 203 case UCS2LE: 204 case UTF_16BE: 205 case UTF_16LE: 206 l = 2; 207 if (*inb < 2) goto starved; 208 c = get_16((void *)*in, type); 209 if ((unsigned)(c-0xdc00) < 0x400) goto ilseq; 210 if ((unsigned)(c-0xd800) < 0x400) { 211 if (type-UCS2BE < 2U) goto ilseq; 212 l = 4; 213 if (*inb < 4) goto starved; 214 d = get_16((void *)(*in + 2), type); 215 if ((unsigned)(d-0xdc00) >= 0x400) goto ilseq; 216 c = ((c-0xd7c0)<<10) + (d-0xdc00); 217 } 218 break; 219 case SHIFT_JIS: 220 if (c-0xa1 <= 0xdf-0xa1) { 221 c += 0xff61-0xa1; 222 break; 223 } 224 l = 2; 225 if (*inb < 2) goto starved; 226 d = *((unsigned char *)*in + 1); 227 if (c-129 <= 159-129) c -= 129; 228 else if (c-224 <= 239-224) c -= 193; 229 else goto ilseq; 230 c *= 2; 231 if (d-64 <= 158-64) { 232 if (d==127) goto ilseq; 233 if (d>127) d--; 234 d -= 64; 235 } else if (d-159 <= 252-159) { 236 c++; 237 d -= 159; 238 } 239 c = jis0208[c][d]; 240 if (!c) goto ilseq; 241 break; 242 case EUC_JP: 243 l = 2; 244 if (*inb < 2) goto starved; 245 d = *((unsigned char *)*in + 1); 246 if (c==0x8e) { 247 c = d; 248 if (c-0xa1 > 0xdf-0xa1) goto ilseq; 249 c += 0xff61 - 0xa1; 250 break; 251 } 252 c -= 0xa1; 253 d -= 0xa1; 254 if (c >= 84 || d >= 94) goto ilseq; 255 c = jis0208[c][d]; 256 if (!c) goto ilseq; 257 break; 258 case GB2312: 259 if (c < 0xa1) goto ilseq; 260 case GBK: 261 case GB18030: 262 c -= 0x81; 263 if (c >= 126) goto ilseq; 264 l = 2; 265 if (*inb < 2) goto starved; 266 d = *((unsigned char *)*in + 1); 267 if (d < 0xa1 && type == GB2312) goto ilseq; 268 if (d-0x40>=191 || d==127) { 269 if (d-'0'>9 || type != GB18030) 270 goto ilseq; 271 l = 4; 272 if (*inb < 4) goto starved; 273 c = (10*c + d-'0') * 1260; 274 d = *((unsigned char *)*in + 2); 275 if (d-0x81>126) goto ilseq; 276 c += 10*(d-0x81); 277 d = *((unsigned char *)*in + 3); 278 if (d-'0'>9) goto ilseq; 279 c += d-'0'; 280 c += 128; 281 for (d=0; d<=c; ) { 282 k = 0; 283 for (int i=0; i<126; i++) 284 for (int j=0; j<190; j++) 285 if (gb18030[i][j]-d <= c-d) 286 k++; 287 d = c+1; 288 c += k; 289 } 290 break; 291 } 292 d -= 0x40; 293 if (d>63) d--; 294 c = gb18030[c][d]; 295 break; 296 case BIG5: 297 l = 2; 298 if (*inb < 2) goto starved; 299 d = *((unsigned char *)*in + 1); 300 if (d-0x40>=0xff-0x40 || d-0x7f<0xa1-0x7f) goto ilseq; 301 d -= 0x40; 302 if (d > 0x3e) d -= 0x22; 303 if (c-0xa1>=0xfa-0xa1) { 304 if (c-0x87>=0xff-0x87) goto ilseq; 305 if (c < 0xa1) c -= 0x87; 306 else c -= 0x87 + (0xfa-0xa1); 307 c = (hkscs[4867+(c*157+d)/16]>>(c*157+d)%16)%2<<17 308 | hkscs[c*157+d]; 309 /* A few HKSCS characters map to pairs of UCS 310 * characters. These are mapped to surrogate 311 * range in the hkscs table then hard-coded 312 * here. Ugly, yes. */ 313 if (c/256 == 0xdc) { 314 if (totype-0300U > 8) k = 2; 315 else k = "\10\4\4\10\4\4\10\2\4"[totype-0300]; 316 if (k > *outb) goto toobig; 317 x += iconv((iconv_t)(uintptr_t)to, 318 &(char *){"\303\212\314\204" 319 "\303\212\314\214" 320 "\303\252\314\204" 321 "\303\252\314\214" 322 +c%256}, &(size_t){4}, 323 out, outb); 324 continue; 325 } 326 if (!c) goto ilseq; 327 break; 328 } 329 c -= 0xa1; 330 c = big5[c][d]|(c==0x27&&(d==0x3a||d==0x3c||d==0x42))<<17; 331 if (!c) goto ilseq; 332 break; 333 case EUC_KR: 334 l = 2; 335 if (*inb < 2) goto starved; 336 d = *((unsigned char *)*in + 1); 337 c -= 0xa1; 338 d -= 0xa1; 339 if (c >= 93 || d >= 94) { 340 c += (0xa1-0x81); 341 d += 0xa1; 342 if (c >= 93 || c>=0xc6-0x81 && d>0x52) 343 goto ilseq; 344 if (d-'A'<26) d = d-'A'; 345 else if (d-'a'<26) d = d-'a'+26; 346 else if (d-0x81<0xff-0x81) d = d-0x81+52; 347 else goto ilseq; 348 if (c < 0x20) c = 178*c + d; 349 else c = 178*0x20 + 84*(c-0x20) + d; 350 c += 0xac00; 351 for (d=0xac00; d<=c; ) { 352 k = 0; 353 for (int i=0; i<93; i++) 354 for (int j=0; j<94; j++) 355 if (ksc[i][j]-d <= c-d) 356 k++; 357 d = c+1; 358 c += k; 359 } 360 break; 361 } 362 c = ksc[c][d]; 363 if (!c) goto ilseq; 364 break; 365 default: 366 if (c < 128+type) break; 367 c -= 128+type; 368 c = legacy_chars[ map[c*5/4]>>2*c%8 | 369 map[c*5/4+1]<<8-2*c%8 & 1023 ]; 370 if (!c) c = *(unsigned char *)*in; 371 if (c==1) goto ilseq; 372 } 373 374 switch (totype) { 375 case WCHAR_T: 376 if (*outb < sizeof(wchar_t)) goto toobig; 377 *(wchar_t *)*out = c; 378 *out += sizeof(wchar_t); 379 *outb -= sizeof(wchar_t); 380 break; 381 case UTF_8: 382 if (*outb < 4) { 383 char tmp[4]; 384 k = wctomb_utf8(tmp, c); 385 if (*outb < k) goto toobig; 386 memcpy(*out, tmp, k); 387 } else k = wctomb_utf8(*out, c); 388 *out += k; 389 *outb -= k; 390 break; 391 case US_ASCII: 392 if (c > 0x7f) subst: x++, c='*'; 393 default: 394 if (*outb < 1) goto toobig; 395 if (c < 128+totype) { 396 revout: 397 *(*out)++ = c; 398 *outb -= 1; 399 break; 400 } 401 d = c; 402 for (c=0; c<128-totype; c++) { 403 if (d == legacy_chars[ tomap[c*5/4]>>2*c%8 | 404 tomap[c*5/4+1]<<8-2*c%8 & 1023 ]) { 405 c += 128; 406 goto revout; 407 } 408 } 409 goto subst; 410 case UCS2BE: 411 case UCS2LE: 412 case UTF_16BE: 413 case UTF_16LE: 414 if (c < 0x10000 || type-UCS2BE < 2U) { 415 if (c >= 0x10000) c = 0xFFFD; 416 if (*outb < 2) goto toobig; 417 put_16((void *)*out, c, totype); 418 *out += 2; 419 *outb -= 2; 420 break; 421 } 422 if (*outb < 4) goto toobig; 423 c -= 0x10000; 424 put_16((void *)*out, (c>>10)|0xd800, totype); 425 put_16((void *)(*out + 2), (c&0x3ff)|0xdc00, totype); 426 *out += 4; 427 *outb -= 4; 428 break; 429 case UTF_32BE: 430 case UTF_32LE: 431 if (*outb < 4) goto toobig; 432 put_32((void *)*out, c, totype); 433 *out += 4; 434 *outb -= 4; 435 break; 436 } 437 } 438 *ploc = loc; 439 return x; 440ilseq: 441 err = EILSEQ; 442 x = -1; 443 goto end; 444toobig: 445 err = E2BIG; 446 x = -1; 447 goto end; 448starved: 449 err = EINVAL; 450 x = -1; 451end: 452 errno = err; 453 *ploc = loc; 454 return x; 455} 456