| 1 | /* |
| 2 | ** Copyright 2011 Double Precision, Inc. |
| 3 | ** See COPYING for distribution information. |
| 4 | ** |
| 5 | */ |
| 6 | |
| 7 | #include "unicode_config.h" |
| 8 | #include "unicode.h" |
| 9 | |
| 10 | #include <unistd.h> |
| 11 | #include <stdint.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <string.h> |
| 14 | #include <errno.h> |
| 15 | |
| 16 | #include "linebreaktab_internal.h" |
| 17 | |
| 18 | #include "linebreaktab.h" |
| 19 | |
| 20 | #define UNICODE_LB_SOT 0xFF |
| 21 | |
| 22 | struct unicode_lb_info { |
| 23 | int (*cb_func)(int, void *); |
| 24 | void *cb_arg; |
| 25 | |
| 26 | int opts; |
| 27 | |
| 28 | uint8_t savedclass; |
| 29 | size_t savedcmcnt; |
| 30 | |
| 31 | uint8_t prevclass; |
| 32 | uint8_t prevclass_nsp; |
| 33 | |
| 34 | int (*next_handler)(struct unicode_lb_info *, uint8_t); |
| 35 | int (*end_handler)(struct unicode_lb_info *); |
| 36 | }; |
| 37 | |
| 38 | |
| 39 | /* http://www.unicode.org/reports/tr14/#Algorithm */ |
| 40 | |
| 41 | static int next_def(unicode_lb_info_t, uint8_t); |
| 42 | static int end_def(unicode_lb_info_t); |
| 43 | |
| 44 | static int next_lb25_seenophy(unicode_lb_info_t, uint8_t); |
| 45 | static int end_lb25_seenophy(unicode_lb_info_t); |
| 46 | |
| 47 | static int next_lb25_seennu(unicode_lb_info_t, uint8_t); |
| 48 | |
| 49 | static int next_lb25_seennuclcp(unicode_lb_info_t, uint8_t); |
| 50 | |
| 51 | static void unicode_lb_reset(unicode_lb_info_t i) |
| 52 | { |
| 53 | i->prevclass=i->prevclass_nsp=UNICODE_LB_SOT; |
| 54 | i->next_handler=next_def; |
| 55 | i->end_handler=end_def; |
| 56 | } |
| 57 | |
| 58 | unicode_lb_info_t unicode_lb_init(int (*cb_func)(int, void *), |
| 59 | void *cb_arg) |
| 60 | { |
| 61 | unicode_lb_info_t i=calloc(1, sizeof(struct unicode_lb_info)); |
| 62 | |
| 63 | i->cb_func=cb_func; |
| 64 | i->cb_arg=cb_arg; |
| 65 | |
| 66 | unicode_lb_reset(i); |
| 67 | return i; |
| 68 | } |
| 69 | |
| 70 | int unicode_lb_end(unicode_lb_info_t i) |
| 71 | { |
| 72 | int rc=(*i->end_handler)(i); |
| 73 | |
| 74 | free(i); |
| 75 | return rc; |
| 76 | } |
| 77 | |
| 78 | void unicode_lb_set_opts(unicode_lb_info_t i, int opts) |
| 79 | { |
| 80 | i->opts=opts; |
| 81 | } |
| 82 | |
| 83 | /* Default end handler has nothing to do */ |
| 84 | |
| 85 | static int end_def(unicode_lb_info_t i) |
| 86 | { |
| 87 | /* LB3 N/A */ |
| 88 | return 0; |
| 89 | } |
| 90 | #define RESULT(x) (*i->cb_func)((x), i->cb_arg) |
| 91 | |
| 92 | int unicode_lb_next_cnt(unicode_lb_info_t i, |
| 93 | const unicode_char *chars, |
| 94 | size_t cnt) |
| 95 | { |
| 96 | while (cnt) |
| 97 | { |
| 98 | int rc=unicode_lb_next(i, *chars); |
| 99 | |
| 100 | if (rc) |
| 101 | return rc; |
| 102 | |
| 103 | ++chars; |
| 104 | --cnt; |
| 105 | } |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | int unicode_lb_lookup(unicode_char ch) |
| 110 | { |
| 111 | return unicode_tab_lookup(ch, |
| 112 | unicode_indextab, |
| 113 | sizeof(unicode_indextab) |
| 114 | / sizeof(unicode_indextab[0]), |
| 115 | unicode_rangetab, |
| 116 | unicode_classtab, |
| 117 | UNICODE_LB_AL /* XX, LB1 */); |
| 118 | } |
| 119 | |
| 120 | int unicode_lb_next(unicode_lb_info_t i, |
| 121 | unicode_char ch) |
| 122 | { |
| 123 | return (*i->next_handler)(i, (i->opts & UNICODE_LB_OPT_DASHWJ) && |
| 124 | (ch == 0x2012 || ch == 0x2013) |
| 125 | ? UNICODE_LB_WJ:unicode_lb_lookup(ch)); |
| 126 | } |
| 127 | |
| 128 | static int next_def_nolb25(unicode_lb_info_t i, |
| 129 | uint8_t uclass, |
| 130 | int nolb25); |
| 131 | |
| 132 | /* |
| 133 | ** Default logic for next unicode char. |
| 134 | */ |
| 135 | static int next_def(unicode_lb_info_t i, |
| 136 | uint8_t uclass) |
| 137 | { |
| 138 | return next_def_nolb25(i, uclass, 0); |
| 139 | } |
| 140 | |
| 141 | static int next_def_nolb25(unicode_lb_info_t i, |
| 142 | uint8_t uclass, |
| 143 | |
| 144 | /* Flag -- recursively invoked after discarding LB25 */ |
| 145 | int nolb25) |
| 146 | { |
| 147 | |
| 148 | /* Retrieve the previous unicode character's linebreak class. */ |
| 149 | |
| 150 | uint8_t prevclass=i->prevclass; |
| 151 | uint8_t prevclass_nsp=i->prevclass_nsp; |
| 152 | |
| 153 | /* Save this unicode char's linebreak class, for the next goaround */ |
| 154 | i->prevclass=uclass; |
| 155 | |
| 156 | if (uclass != UNICODE_LB_SP) |
| 157 | i->prevclass_nsp=uclass; |
| 158 | |
| 159 | if (uclass == UNICODE_LB_NU) |
| 160 | i->next_handler=next_lb25_seennu; /* LB25 */ |
| 161 | |
| 162 | if (prevclass == UNICODE_LB_SOT) |
| 163 | { |
| 164 | if (uclass == UNICODE_LB_CM) /* LB9 */ |
| 165 | i->prevclass=i->prevclass_nsp=uclass=UNICODE_LB_AL; |
| 166 | |
| 167 | return RESULT(UNICODE_LB_NONE); /* LB2 */ |
| 168 | } |
| 169 | |
| 170 | if (prevclass == UNICODE_LB_CR && uclass == UNICODE_LB_LF) |
| 171 | return RESULT(UNICODE_LB_NONE); /* LB5 */ |
| 172 | |
| 173 | switch (prevclass) { |
| 174 | case UNICODE_LB_BK: |
| 175 | case UNICODE_LB_CR: |
| 176 | case UNICODE_LB_LF: |
| 177 | case UNICODE_LB_NL: |
| 178 | |
| 179 | if (uclass == UNICODE_LB_CM) |
| 180 | { |
| 181 | i->prevclass=i->prevclass_nsp=uclass=UNICODE_LB_AL; |
| 182 | /* LB9 */ |
| 183 | } |
| 184 | |
| 185 | return RESULT(UNICODE_LB_MANDATORY); /* LB4, LB5 */ |
| 186 | |
| 187 | case UNICODE_LB_SP: |
| 188 | case UNICODE_LB_ZW: |
| 189 | if (uclass == UNICODE_LB_CM) |
| 190 | i->prevclass=i->prevclass_nsp=uclass=UNICODE_LB_AL; |
| 191 | /* LB10 */ |
| 192 | break; |
| 193 | default: |
| 194 | break; |
| 195 | } |
| 196 | |
| 197 | switch (uclass) { |
| 198 | |
| 199 | /* LB6: */ |
| 200 | case UNICODE_LB_BK: |
| 201 | case UNICODE_LB_CR: |
| 202 | case UNICODE_LB_LF: |
| 203 | case UNICODE_LB_NL: |
| 204 | |
| 205 | /* LB7: */ |
| 206 | case UNICODE_LB_SP: |
| 207 | case UNICODE_LB_ZW: |
| 208 | |
| 209 | return RESULT(UNICODE_LB_NONE); |
| 210 | default: |
| 211 | break; |
| 212 | } |
| 213 | |
| 214 | if (prevclass_nsp == UNICODE_LB_ZW) |
| 215 | return RESULT(UNICODE_LB_ALLOWED); /* LB8 */ |
| 216 | |
| 217 | if (uclass == UNICODE_LB_CM) |
| 218 | { |
| 219 | i->prevclass=prevclass; |
| 220 | i->prevclass_nsp=prevclass_nsp; |
| 221 | return RESULT(UNICODE_LB_NONE); /* LB9 */ |
| 222 | } |
| 223 | |
| 224 | if (prevclass == UNICODE_LB_WJ || uclass == UNICODE_LB_WJ) |
| 225 | return RESULT(UNICODE_LB_NONE); /* LB11 */ |
| 226 | |
| 227 | if (prevclass == UNICODE_LB_GL) |
| 228 | return RESULT(UNICODE_LB_NONE); /* LB12 */ |
| 229 | |
| 230 | if (uclass == UNICODE_LB_GL && |
| 231 | prevclass != UNICODE_LB_SP && |
| 232 | prevclass != UNICODE_LB_BA && |
| 233 | prevclass != UNICODE_LB_HY) |
| 234 | return RESULT(UNICODE_LB_NONE); /* LB12a */ |
| 235 | |
| 236 | |
| 237 | switch (uclass) { |
| 238 | case UNICODE_LB_SY: |
| 239 | if (i->opts & UNICODE_LB_OPT_SYBREAK) |
| 240 | { |
| 241 | if (prevclass == UNICODE_LB_SP) |
| 242 | return RESULT(UNICODE_LB_ALLOWED); |
| 243 | } |
| 244 | |
| 245 | case UNICODE_LB_CL: |
| 246 | case UNICODE_LB_CP: |
| 247 | case UNICODE_LB_EX: |
| 248 | case UNICODE_LB_IS: |
| 249 | return RESULT(UNICODE_LB_NONE); /* LB13 */ |
| 250 | default: |
| 251 | break; |
| 252 | } |
| 253 | |
| 254 | if ((i->opts & UNICODE_LB_OPT_SYBREAK) && prevclass == UNICODE_LB_SY) |
| 255 | switch (uclass) { |
| 256 | case UNICODE_LB_EX: |
| 257 | case UNICODE_LB_AL: |
| 258 | case UNICODE_LB_ID: |
| 259 | return RESULT(UNICODE_LB_NONE); |
| 260 | } |
| 261 | |
| 262 | if (prevclass_nsp == UNICODE_LB_OP) |
| 263 | return RESULT(UNICODE_LB_NONE); /* LB14 */ |
| 264 | |
| 265 | if (prevclass_nsp == UNICODE_LB_QU && uclass == UNICODE_LB_OP) |
| 266 | return RESULT(UNICODE_LB_NONE); /* LB15 */ |
| 267 | |
| 268 | if ((prevclass_nsp == UNICODE_LB_CL || prevclass_nsp == UNICODE_LB_CP) |
| 269 | && uclass == UNICODE_LB_NS) |
| 270 | return RESULT(UNICODE_LB_NONE); /* LB16 */ |
| 271 | |
| 272 | if (prevclass_nsp == UNICODE_LB_B2 && uclass == UNICODE_LB_B2) |
| 273 | return RESULT(UNICODE_LB_NONE); /* LB17 */ |
| 274 | |
| 275 | if (prevclass == UNICODE_LB_SP) |
| 276 | return RESULT(UNICODE_LB_ALLOWED); /* LB18 */ |
| 277 | |
| 278 | if (uclass == UNICODE_LB_QU || prevclass == UNICODE_LB_QU) |
| 279 | return RESULT(UNICODE_LB_NONE); /* LB19 */ |
| 280 | |
| 281 | if (uclass == UNICODE_LB_CB || prevclass == UNICODE_LB_CB) |
| 282 | return RESULT(UNICODE_LB_ALLOWED); /* LB20 */ |
| 283 | |
| 284 | /* LB21: */ |
| 285 | |
| 286 | switch (uclass) { |
| 287 | case UNICODE_LB_BA: |
| 288 | case UNICODE_LB_HY: |
| 289 | case UNICODE_LB_NS: |
| 290 | return RESULT(UNICODE_LB_NONE); |
| 291 | default: |
| 292 | break; |
| 293 | } |
| 294 | |
| 295 | if (prevclass == UNICODE_LB_BB) |
| 296 | return RESULT(UNICODE_LB_NONE); |
| 297 | |
| 298 | if (uclass == UNICODE_LB_IN) |
| 299 | switch (prevclass) { |
| 300 | case UNICODE_LB_AL: |
| 301 | case UNICODE_LB_ID: |
| 302 | case UNICODE_LB_IN: |
| 303 | case UNICODE_LB_NU: |
| 304 | return RESULT(UNICODE_LB_NONE); /* LB22 */ |
| 305 | default: |
| 306 | break; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | if (prevclass == UNICODE_LB_ID && uclass == UNICODE_LB_PO) |
| 311 | return RESULT(UNICODE_LB_NONE); /* LB23 */ |
| 312 | if (prevclass == UNICODE_LB_AL && uclass == UNICODE_LB_NU) |
| 313 | return RESULT(UNICODE_LB_NONE); /* LB23 */ |
| 314 | |
| 315 | if (prevclass == UNICODE_LB_NU && uclass == UNICODE_LB_AL) |
| 316 | return RESULT(UNICODE_LB_NONE); /* LB23 */ |
| 317 | |
| 318 | |
| 319 | if (prevclass == UNICODE_LB_PR && uclass == UNICODE_LB_ID) |
| 320 | return RESULT(UNICODE_LB_NONE); /* LB24 */ |
| 321 | if (prevclass == UNICODE_LB_PR && uclass == UNICODE_LB_AL) |
| 322 | return RESULT(UNICODE_LB_NONE); /* LB24 */ |
| 323 | if (prevclass == UNICODE_LB_PO && uclass == UNICODE_LB_AL) |
| 324 | return RESULT(UNICODE_LB_NONE); /* LB24 */ |
| 325 | |
| 326 | if ((i->opts & UNICODE_LB_OPT_PRBREAK) && uclass == UNICODE_LB_PR) |
| 327 | switch (prevclass) { |
| 328 | case UNICODE_LB_PR: |
| 329 | case UNICODE_LB_AL: |
| 330 | case UNICODE_LB_ID: |
| 331 | return RESULT(UNICODE_LB_NONE); |
| 332 | } |
| 333 | |
| 334 | if (!nolb25 && |
| 335 | (prevclass == UNICODE_LB_PR || prevclass == UNICODE_LB_PO)) |
| 336 | { |
| 337 | if (uclass == UNICODE_LB_NU) |
| 338 | return RESULT(UNICODE_LB_NONE); /* LB25 */ |
| 339 | |
| 340 | if (uclass == UNICODE_LB_OP || uclass == UNICODE_LB_HY) |
| 341 | { |
| 342 | i->prevclass=prevclass; |
| 343 | i->prevclass_nsp=prevclass_nsp; |
| 344 | |
| 345 | i->savedclass=uclass; |
| 346 | i->savedcmcnt=0; |
| 347 | i->next_handler=next_lb25_seenophy; |
| 348 | i->end_handler=end_lb25_seenophy; |
| 349 | return 0; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if ((prevclass == UNICODE_LB_OP || prevclass == UNICODE_LB_HY) && |
| 354 | uclass == UNICODE_LB_NU) |
| 355 | return RESULT(UNICODE_LB_NONE); /* LB25 */ |
| 356 | |
| 357 | /*****/ |
| 358 | |
| 359 | if (prevclass == UNICODE_LB_JL) |
| 360 | switch (uclass) { |
| 361 | case UNICODE_LB_JL: |
| 362 | case UNICODE_LB_JV: |
| 363 | case UNICODE_LB_H2: |
| 364 | case UNICODE_LB_H3: |
| 365 | return RESULT(UNICODE_LB_NONE); /* LB26 */ |
| 366 | default: |
| 367 | break; |
| 368 | } |
| 369 | |
| 370 | if ((prevclass == UNICODE_LB_JV || |
| 371 | prevclass == UNICODE_LB_H2) && |
| 372 | (uclass == UNICODE_LB_JV || |
| 373 | uclass == UNICODE_LB_JT)) |
| 374 | return RESULT(UNICODE_LB_NONE); /* LB26 */ |
| 375 | |
| 376 | if ((prevclass == UNICODE_LB_JT || |
| 377 | prevclass == UNICODE_LB_H3) && |
| 378 | uclass == UNICODE_LB_JT) |
| 379 | return RESULT(UNICODE_LB_NONE); /* LB26 */ |
| 380 | |
| 381 | |
| 382 | switch (prevclass) { |
| 383 | case UNICODE_LB_JL: |
| 384 | case UNICODE_LB_JV: |
| 385 | case UNICODE_LB_JT: |
| 386 | case UNICODE_LB_H2: |
| 387 | case UNICODE_LB_H3: |
| 388 | if (uclass == UNICODE_LB_IN || uclass == UNICODE_LB_PO) |
| 389 | return RESULT(UNICODE_LB_NONE); /* LB27 */ |
| 390 | default: |
| 391 | break; |
| 392 | } |
| 393 | |
| 394 | switch (uclass) { |
| 395 | case UNICODE_LB_JL: |
| 396 | case UNICODE_LB_JV: |
| 397 | case UNICODE_LB_JT: |
| 398 | case UNICODE_LB_H2: |
| 399 | case UNICODE_LB_H3: |
| 400 | if (prevclass == UNICODE_LB_PR) |
| 401 | return RESULT(UNICODE_LB_NONE); /* LB27 */ |
| 402 | default: |
| 403 | break; |
| 404 | } |
| 405 | |
| 406 | if (prevclass == UNICODE_LB_AL && uclass == UNICODE_LB_AL) |
| 407 | return RESULT(UNICODE_LB_NONE); /* LB28 */ |
| 408 | |
| 409 | if (prevclass == UNICODE_LB_IS && uclass == UNICODE_LB_AL) |
| 410 | return RESULT(UNICODE_LB_NONE); /* LB29 */ |
| 411 | |
| 412 | if ((prevclass == UNICODE_LB_AL || prevclass == UNICODE_LB_NU) && |
| 413 | uclass == UNICODE_LB_OP) |
| 414 | return RESULT(UNICODE_LB_NONE); /* LB30 */ |
| 415 | |
| 416 | if ((uclass == UNICODE_LB_AL || uclass == UNICODE_LB_NU) && |
| 417 | prevclass == UNICODE_LB_CP) |
| 418 | return RESULT(UNICODE_LB_NONE); /* LB30 */ |
| 419 | |
| 420 | return RESULT(UNICODE_LB_ALLOWED); /* LB31 */ |
| 421 | } |
| 422 | |
| 423 | /* |
| 424 | ** Seen (PR|PO)(OP|HY), without returning the linebreak property for the second |
| 425 | ** character, but NU did not follow. Backtrack. |
| 426 | */ |
| 427 | |
| 428 | static int unwind_lb25_seenophy(unicode_lb_info_t i) |
| 429 | { |
| 430 | int rc; |
| 431 | |
| 432 | /*uint8_t class=i->savedclass;*/ |
| 433 | int nolb25_flag=1; |
| 434 | |
| 435 | i->next_handler=next_def; |
| 436 | i->end_handler=end_def; |
| 437 | |
| 438 | do |
| 439 | { |
| 440 | rc=next_def_nolb25(i, i->savedclass, nolb25_flag); |
| 441 | |
| 442 | if (rc) |
| 443 | return rc; |
| 444 | |
| 445 | /*class=UNICODE_LB_CM;*/ |
| 446 | nolb25_flag=0; |
| 447 | } while (i->savedcmcnt--); |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | /* |
| 452 | ** Seen (PR|PO)(OP|HY), without returning the linebreak property for the second |
| 453 | ** character. If there's now a NU, we found the modified LB25 regexp. |
| 454 | */ |
| 455 | |
| 456 | static int next_lb25_seenophy(unicode_lb_info_t i, |
| 457 | uint8_t uclass) |
| 458 | { |
| 459 | int rc; |
| 460 | |
| 461 | if (uclass == UNICODE_LB_CM) |
| 462 | { |
| 463 | ++i->savedcmcnt; /* Keep track of CMs, and try again */ |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | if (uclass != UNICODE_LB_NU) |
| 468 | { |
| 469 | rc=unwind_lb25_seenophy(i); |
| 470 | |
| 471 | if (rc) |
| 472 | return rc; |
| 473 | |
| 474 | return next_def_nolb25(i, uclass, 0); |
| 475 | } |
| 476 | |
| 477 | do |
| 478 | { |
| 479 | rc=RESULT(UNICODE_LB_NONE); /* (OP|HY) feedback */ |
| 480 | |
| 481 | if (rc) |
| 482 | return rc; |
| 483 | } while (i->savedcmcnt--); |
| 484 | |
| 485 | i->next_handler=next_lb25_seennu; |
| 486 | i->end_handler=end_def; |
| 487 | i->prevclass=i->prevclass_nsp=uclass; |
| 488 | return RESULT(UNICODE_LB_NONE); |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | ** Seen (PR|PO)(OP|HY), and now The End. Unwind, and give up. |
| 493 | */ |
| 494 | |
| 495 | static int end_lb25_seenophy(unicode_lb_info_t i) |
| 496 | { |
| 497 | int rc=unwind_lb25_seenophy(i); |
| 498 | |
| 499 | if (rc == 0) |
| 500 | rc=end_def(i); |
| 501 | return rc; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | ** Seen an NU, modified LB25 regexp. |
| 506 | */ |
| 507 | static int next_lb25_seennu(unicode_lb_info_t i, uint8_t uclass) |
| 508 | { |
| 509 | if (uclass == UNICODE_LB_NU || uclass == UNICODE_LB_SY || |
| 510 | uclass == UNICODE_LB_IS) |
| 511 | { |
| 512 | i->prevclass=i->prevclass_nsp=uclass; |
| 513 | return RESULT(UNICODE_LB_NONE); |
| 514 | } |
| 515 | |
| 516 | if (uclass == UNICODE_LB_CM) |
| 517 | return RESULT(UNICODE_LB_NONE); /* LB9 */ |
| 518 | |
| 519 | if (uclass == UNICODE_LB_CL || uclass == UNICODE_LB_CP) |
| 520 | { |
| 521 | i->prevclass=i->prevclass_nsp=uclass; |
| 522 | i->next_handler=next_lb25_seennuclcp; |
| 523 | i->end_handler=end_def; |
| 524 | return RESULT(UNICODE_LB_NONE); |
| 525 | } |
| 526 | |
| 527 | i->next_handler=next_def; |
| 528 | i->end_handler=end_def; |
| 529 | |
| 530 | if (uclass == UNICODE_LB_PR || uclass == UNICODE_LB_PO) |
| 531 | { |
| 532 | i->prevclass=i->prevclass_nsp=uclass; |
| 533 | return RESULT(UNICODE_LB_NONE); |
| 534 | } |
| 535 | |
| 536 | return next_def(i, uclass); /* Not a prefix, process normally */ |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | ** Seen CL|CP, in the modified LB25 regexp. |
| 541 | */ |
| 542 | static int next_lb25_seennuclcp(unicode_lb_info_t i, uint8_t uclass) |
| 543 | { |
| 544 | if (uclass == UNICODE_LB_CM) |
| 545 | return RESULT(UNICODE_LB_NONE); /* LB9 */ |
| 546 | |
| 547 | i->next_handler=next_def; |
| 548 | i->end_handler=end_def; |
| 549 | |
| 550 | if (uclass == UNICODE_LB_PR || uclass == UNICODE_LB_PO) |
| 551 | { |
| 552 | i->prevclass=i->prevclass_nsp=uclass; |
| 553 | |
| 554 | return RESULT(UNICODE_LB_NONE); |
| 555 | } |
| 556 | |
| 557 | return next_def(i, uclass); |
| 558 | } |
| 559 | |
| 560 | /******************/ |
| 561 | |
| 562 | struct unicode_lbc_info { |
| 563 | unicode_lb_info_t handle; |
| 564 | |
| 565 | struct unicode_buf buf; |
| 566 | |
| 567 | size_t buf_ptr; |
| 568 | |
| 569 | int (*cb_func)(int, unicode_char, void *); |
| 570 | void *cb_arg; |
| 571 | }; |
| 572 | |
| 573 | static int unicode_lbc_callback(int value, void *ptr) |
| 574 | { |
| 575 | unicode_lbc_info_t h=(unicode_lbc_info_t)ptr; |
| 576 | |
| 577 | if (h->buf_ptr >= unicode_buf_len(&h->buf)) |
| 578 | { |
| 579 | errno=EINVAL; |
| 580 | return -1; /* Shouldn't happen */ |
| 581 | } |
| 582 | |
| 583 | return (*h->cb_func)(value, unicode_buf_ptr(&h->buf)[h->buf_ptr++], |
| 584 | h->cb_arg); |
| 585 | } |
| 586 | |
| 587 | unicode_lbc_info_t unicode_lbc_init(int (*cb_func)(int, unicode_char, void *), |
| 588 | void *cb_arg) |
| 589 | { |
| 590 | unicode_lbc_info_t h= |
| 591 | (unicode_lbc_info_t)calloc(1, sizeof(struct unicode_lbc_info)); |
| 592 | |
| 593 | if (!h) |
| 594 | return NULL; |
| 595 | |
| 596 | h->cb_func=cb_func; |
| 597 | h->cb_arg=cb_arg; |
| 598 | |
| 599 | if ((h->handle=unicode_lb_init(unicode_lbc_callback, h)) == NULL) |
| 600 | { |
| 601 | free(h); |
| 602 | return NULL; |
| 603 | } |
| 604 | unicode_buf_init(&h->buf, (size_t)-1); |
| 605 | return h; |
| 606 | } |
| 607 | |
| 608 | void unicode_lbc_set_opts(unicode_lbc_info_t i, int opts) |
| 609 | { |
| 610 | unicode_lb_set_opts(i->handle, opts); |
| 611 | } |
| 612 | |
| 613 | int unicode_lbc_next(unicode_lbc_info_t i, unicode_char ch) |
| 614 | { |
| 615 | if (i->buf_ptr >= unicode_buf_len(&i->buf)) |
| 616 | { |
| 617 | i->buf_ptr=0; |
| 618 | unicode_buf_clear(&i->buf); |
| 619 | } |
| 620 | |
| 621 | unicode_buf_append(&i->buf, &ch, 1); |
| 622 | return unicode_lb_next(i->handle, ch); |
| 623 | } |
| 624 | |
| 625 | int unicode_lbc_end(unicode_lbc_info_t i) |
| 626 | { |
| 627 | int rc=unicode_lb_end(i->handle); |
| 628 | |
| 629 | unicode_buf_deinit(&i->buf); |
| 630 | free(i); |
| 631 | return rc; |
| 632 | } |