/usr/include/unicode/uregex.h is in libicu-dev 4.8.1.1-3ubuntu0.7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 | /*
**********************************************************************
* Copyright (C) 2004-2011, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* file name: uregex.h
* encoding: US-ASCII
* indentation:4
*
* created on: 2004mar09
* created by: Andy Heninger
*
* ICU Regular Expressions, API for C
*/
/**
* \file
* \brief C API: Regular Expressions
*
* <p>This is a C wrapper around the C++ RegexPattern and RegexMatcher classes.</p>
*/
#ifndef UREGEX_H
#define UREGEX_H
#include "unicode/utext.h"
#include "unicode/utypes.h"
#if !UCONFIG_NO_REGULAR_EXPRESSIONS
#include "unicode/localpointer.h"
#include "unicode/parseerr.h"
struct URegularExpression;
/**
* Structure representing a compiled regular expression, plus the results
* of a match operation.
* @stable ICU 3.0
*/
typedef struct URegularExpression URegularExpression;
/**
* Constants for Regular Expression Match Modes.
* @stable ICU 2.4
*/
typedef enum URegexpFlag{
#ifndef U_HIDE_DRAFT_API
/** Forces normalization of pattern and strings.
Not implemented yet, just a placeholder, hence draft.
@draft ICU 2.4 */
UREGEX_CANON_EQ = 128,
#endif
/** Enable case insensitive matching. @stable ICU 2.4 */
UREGEX_CASE_INSENSITIVE = 2,
/** Allow white space and comments within patterns @stable ICU 2.4 */
UREGEX_COMMENTS = 4,
/** If set, '.' matches line terminators, otherwise '.' matching stops at line end.
* @stable ICU 2.4 */
UREGEX_DOTALL = 32,
/** If set, treat the entire pattern as a literal string.
* Metacharacters or escape sequences in the input sequence will be given
* no special meaning. Not implemented yet as of ICU 4.4.
*
* The flags CASE_INSENSITIVE and UNICODE_CASE retain their impact
* on matching when used in conjunction with this flag.
* The other flags become superfluous.
* TODO: say which escapes are still handled; anything Java does
* early (\\u) we should still do.
* @stable ICU 4.0
*/
UREGEX_LITERAL = 16,
/** Control behavior of "$" and "^"
* If set, recognize line terminators within string,
* otherwise, match only at start and end of input string.
* @stable ICU 2.4 */
UREGEX_MULTILINE = 8,
/** Unix-only line endings.
* When this mode is enabled, only \\u000a is recognized as a line ending
* in the behavior of ., ^, and $.
* @stable ICU 4.0
*/
UREGEX_UNIX_LINES = 1,
/** Unicode word boundaries.
* If set, \b uses the Unicode TR 29 definition of word boundaries.
* Warning: Unicode word boundaries are quite different from
* traditional regular expression word boundaries. See
* http://unicode.org/reports/tr29/#Word_Boundaries
* @stable ICU 2.8
*/
UREGEX_UWORD = 256,
/** Error on Unrecognized backslash escapes.
* If set, fail with an error on patterns that contain
* backslash-escaped ASCII letters without a known special
* meaning. If this flag is not set, these
* escaped letters represent themselves.
* @stable ICU 4.0
*/
UREGEX_ERROR_ON_UNKNOWN_ESCAPES = 512
} URegexpFlag;
/**
* Open (compile) an ICU regular expression. Compiles the regular expression in
* string form into an internal representation using the specified match mode flags.
* The resulting regular expression handle can then be used to perform various
* matching operations.
*
*
* @param pattern The Regular Expression pattern to be compiled.
* @param patternLength The length of the pattern, or -1 if the pattern is
* NUL terminated.
* @param flags Flags that alter the default matching behavior for
* the regular expression, UREGEX_CASE_INSENSITIVE, for
* example. For default behavior, set this parameter to zero.
* See <code>enum URegexpFlag</code>. All desired flags
* are bitwise-ORed together.
* @param pe Receives the position (line and column numbers) of any syntax
* error within the source regular expression string. If this
* information is not wanted, pass NULL for this parameter.
* @param status Receives error detected by this function.
* @stable ICU 3.0
*
*/
U_STABLE URegularExpression * U_EXPORT2
uregex_open( const UChar *pattern,
int32_t patternLength,
uint32_t flags,
UParseError *pe,
UErrorCode *status);
/**
* Open (compile) an ICU regular expression. Compiles the regular expression in
* string form into an internal representation using the specified match mode flags.
* The resulting regular expression handle can then be used to perform various
* matching operations.
* <p>
* The contents of the pattern UText will be extracted and saved. Ownership of the
* UText struct itself remains with the caller. This is to match the behavior of
* uregex_open().
*
* @param pattern The Regular Expression pattern to be compiled.
* @param flags Flags that alter the default matching behavior for
* the regular expression, UREGEX_CASE_INSENSITIVE, for
* example. For default behavior, set this parameter to zero.
* See <code>enum URegexpFlag</code>. All desired flags
* are bitwise-ORed together.
* @param pe Receives the position (line and column numbers) of any syntax
* error within the source regular expression string. If this
* information is not wanted, pass NULL for this parameter.
* @param status Receives error detected by this function.
*
* @draft ICU 4.6
*/
U_DRAFT URegularExpression * U_EXPORT2
uregex_openUText(UText *pattern,
uint32_t flags,
UParseError *pe,
UErrorCode *status);
/**
* Open (compile) an ICU regular expression. The resulting regular expression
* handle can then be used to perform various matching operations.
* <p>
* This function is the same as uregex_open, except that the pattern
* is supplied as an 8 bit char * string in the default code page.
*
* @param pattern The Regular Expression pattern to be compiled,
* NUL terminated.
* @param flags Flags that alter the default matching behavior for
* the regular expression, UREGEX_CASE_INSENSITIVE, for
* example. For default behavior, set this parameter to zero.
* See <code>enum URegexpFlag</code>. All desired flags
* are bitwise-ORed together.
* @param pe Receives the position (line and column numbers) of any syntax
* error within the source regular expression string. If this
* information is not wanted, pass NULL for this parameter.
* @param status Receives errors detected by this function.
* @return The URegularExpression object representing the compiled
* pattern.
*
* @stable ICU 3.0
*/
#if !UCONFIG_NO_CONVERSION
U_STABLE URegularExpression * U_EXPORT2
uregex_openC( const char *pattern,
uint32_t flags,
UParseError *pe,
UErrorCode *status);
#endif
/**
* Close the regular expression, recovering all resources (memory) it
* was holding.
*
* @param regexp The regular expression to be closed.
* @stable ICU 3.0
*/
U_STABLE void U_EXPORT2
uregex_close(URegularExpression *regexp);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalURegularExpressionPointer
* "Smart pointer" class, closes a URegularExpression via uregex_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 4.4
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalURegularExpressionPointer, URegularExpression, uregex_close);
U_NAMESPACE_END
#endif
/**
* Make a copy of a compiled regular expression. Cloning a regular
* expression is faster than opening a second instance from the source
* form of the expression, and requires less memory.
* <p>
* Note that the current input string and the position of any matched text
* within it are not cloned; only the pattern itself and the
* match mode flags are copied.
* <p>
* Cloning can be particularly useful to threaded applications that perform
* multiple match operations in parallel. Each concurrent RE
* operation requires its own instance of a URegularExpression.
*
* @param regexp The compiled regular expression to be cloned.
* @param status Receives indication of any errors encountered
* @return the cloned copy of the compiled regular expression.
* @stable ICU 3.0
*/
U_STABLE URegularExpression * U_EXPORT2
uregex_clone(const URegularExpression *regexp, UErrorCode *status);
/**
* Returns a pointer to the source form of the pattern for this regular expression.
* This function will work even if the pattern was originally specified as a UText.
*
* @param regexp The compiled regular expression.
* @param patLength This output parameter will be set to the length of the
* pattern string. A NULL pointer may be used here if the
* pattern length is not needed, as would be the case if
* the pattern is known in advance to be a NUL terminated
* string.
* @param status Receives errors detected by this function.
* @return a pointer to the pattern string. The storage for the string is
* owned by the regular expression object, and must not be
* altered or deleted by the application. The returned string
* will remain valid until the regular expression is closed.
* @stable ICU 3.0
*/
U_STABLE const UChar * U_EXPORT2
uregex_pattern(const URegularExpression *regexp,
int32_t *patLength,
UErrorCode *status);
/**
* Returns the source text of the pattern for this regular expression.
* This function will work even if the pattern was originally specified as a UChar string.
*
* @param regexp The compiled regular expression.
* @param status Receives errors detected by this function.
* @return the pattern text. The storage for the text is owned by the regular expression
* object, and must not be altered or deleted.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_patternUText(const URegularExpression *regexp,
UErrorCode *status);
/**
* Get the match mode flags that were specified when compiling this regular expression.
* @param status Receives errors detected by this function.
* @param regexp The compiled regular expression.
* @return The match mode flags
* @see URegexpFlag
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_flags(const URegularExpression *regexp,
UErrorCode *status);
/**
* Set the subject text string upon which the regular expression will look for matches.
* This function may be called any number of times, allowing the regular
* expression pattern to be applied to different strings.
* <p>
* Regular expression matching operations work directly on the application's
* string data. No copy is made. The subject string data must not be
* altered after calling this function until after all regular expression
* operations involving this string data are completed.
* <p>
* Zero length strings are permitted. In this case, no subsequent match
* operation will dereference the text string pointer.
*
* @param regexp The compiled regular expression.
* @param text The subject text string.
* @param textLength The length of the subject text, or -1 if the string
* is NUL terminated.
* @param status Receives errors detected by this function.
* @stable ICU 3.0
*/
U_STABLE void U_EXPORT2
uregex_setText(URegularExpression *regexp,
const UChar *text,
int32_t textLength,
UErrorCode *status);
/**
* Set the subject text string upon which the regular expression will look for matches.
* This function may be called any number of times, allowing the regular
* expression pattern to be applied to different strings.
* <p>
* Regular expression matching operations work directly on the application's
* string data; only a shallow clone is made. The subject string data must not be
* altered after calling this function until after all regular expression
* operations involving this string data are completed.
*
* @param regexp The compiled regular expression.
* @param text The subject text string.
* @param status Receives errors detected by this function.
*
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_setUText(URegularExpression *regexp,
UText *text,
UErrorCode *status);
/**
* Get the subject text that is currently associated with this
* regular expression object. If the input was supplied using uregex_setText(),
* that pointer will be returned. Otherwise, the characters in the input will
* be extracted to a buffer and returned. In either case, ownership remains
* with the regular expression object.
*
* This function will work even if the input was originally specified as a UText.
*
* @param regexp The compiled regular expression.
* @param textLength The length of the string is returned in this output parameter.
* A NULL pointer may be used here if the
* text length is not needed, as would be the case if
* the text is known in advance to be a NUL terminated
* string.
* @param status Receives errors detected by this function.
* @return Pointer to the subject text string currently associated with
* this regular expression.
* @stable ICU 3.0
*/
U_STABLE const UChar * U_EXPORT2
uregex_getText(URegularExpression *regexp,
int32_t *textLength,
UErrorCode *status);
/**
* Get the subject text that is currently associated with this
* regular expression object.
*
* This function will work even if the input was originally specified as a UChar string.
*
* @param regexp The compiled regular expression.
* @param dest A mutable UText in which to store the current input.
* If NULL, a new UText will be created as an immutable shallow clone
* of the actual input string.
* @param status Receives errors detected by this function.
* @return The subject text currently associated with this regular expression.
* If a pre-allocated UText was provided, it will always be used and returned.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_getUText(URegularExpression *regexp,
UText *dest,
UErrorCode *status);
/**
* Set the subject text string upon which the regular expression is looking for matches
* without changing any other aspect of the matching state.
* The new and previous text strings must have the same content.
*
* This function is intended for use in environments where ICU is operating on
* strings that may move around in memory. It provides a mechanism for notifying
* ICU that the string has been relocated, and providing a new UText to access the
* string in its new position.
*
* Note that the regular expression implementation never copies the underlying text
* of a string being matched, but always operates directly on the original text
* provided by the user. Refreshing simply drops the references to the old text
* and replaces them with references to the new.
*
* Caution: this function is normally used only by very specialized
* system-level code. One example use case is with garbage collection
* that moves the text in memory.
*
* @param regexp The compiled regular expression.
* @param text The new (moved) text string.
* @param status Receives errors detected by this function.
*
* @draft ICU 4.8
*/
U_DRAFT void U_EXPORT2
uregex_refreshUText(URegularExpression *regexp,
UText *text,
UErrorCode *status);
/**
* Attempts to match the input string against the pattern.
* To succeed, the match must extend to the end of the string,
* or cover the complete match region.
*
* If startIndex >= zero the match operation starts at the specified
* index and must extend to the end of the input string. Any region
* that has been specified is reset.
*
* If startIndex == -1 the match must cover the input region, or the entire
* input string if no region has been set. This directly corresponds to
* Matcher.matches() in Java
*
* @param regexp The compiled regular expression.
* @param startIndex The input string (native) index at which to begin matching, or -1
* to match the input Region.
* @param status Receives errors detected by this function.
* @return TRUE if there is a match
* @stable ICU 3.0
*/
U_STABLE UBool U_EXPORT2
uregex_matches(URegularExpression *regexp,
int32_t startIndex,
UErrorCode *status);
/**
* 64bit version of uregex_matches.
* Attempts to match the input string against the pattern.
* To succeed, the match must extend to the end of the string,
* or cover the complete match region.
*
* If startIndex >= zero the match operation starts at the specified
* index and must extend to the end of the input string. Any region
* that has been specified is reset.
*
* If startIndex == -1 the match must cover the input region, or the entire
* input string if no region has been set. This directly corresponds to
* Matcher.matches() in Java
*
* @param regexp The compiled regular expression.
* @param startIndex The input string (native) index at which to begin matching, or -1
* to match the input Region.
* @param status Receives errors detected by this function.
* @return TRUE if there is a match
* @draft ICU 4.6
*/
U_DRAFT UBool U_EXPORT2
uregex_matches64(URegularExpression *regexp,
int64_t startIndex,
UErrorCode *status);
/**
* Attempts to match the input string, starting from the specified index, against the pattern.
* The match may be of any length, and is not required to extend to the end
* of the input string. Contrast with uregex_matches().
*
* <p>If startIndex is >= 0 any input region that was set for this
* URegularExpression is reset before the operation begins.
*
* <p>If the specified starting index == -1 the match begins at the start of the input
* region, or at the start of the full string if no region has been specified.
* This corresponds directly with Matcher.lookingAt() in Java.
*
* <p>If the match succeeds then more information can be obtained via the
* <code>uregexp_start()</code>, <code>uregexp_end()</code>,
* and <code>uregexp_group()</code> functions.</p>
*
* @param regexp The compiled regular expression.
* @param startIndex The input string (native) index at which to begin matching, or
* -1 to match the Input Region
* @param status A reference to a UErrorCode to receive any errors.
* @return TRUE if there is a match.
* @stable ICU 3.0
*/
U_STABLE UBool U_EXPORT2
uregex_lookingAt(URegularExpression *regexp,
int32_t startIndex,
UErrorCode *status);
/**
* 64bit version of uregex_lookingAt.
* Attempts to match the input string, starting from the specified index, against the pattern.
* The match may be of any length, and is not required to extend to the end
* of the input string. Contrast with uregex_matches().
*
* <p>If startIndex is >= 0 any input region that was set for this
* URegularExpression is reset before the operation begins.
*
* <p>If the specified starting index == -1 the match begins at the start of the input
* region, or at the start of the full string if no region has been specified.
* This corresponds directly with Matcher.lookingAt() in Java.
*
* <p>If the match succeeds then more information can be obtained via the
* <code>uregexp_start()</code>, <code>uregexp_end()</code>,
* and <code>uregexp_group()</code> functions.</p>
*
* @param regexp The compiled regular expression.
* @param startIndex The input string (native) index at which to begin matching, or
* -1 to match the Input Region
* @param status A reference to a UErrorCode to receive any errors.
* @return TRUE if there is a match.
* @draft ICU 4.6
*/
U_DRAFT UBool U_EXPORT2
uregex_lookingAt64(URegularExpression *regexp,
int64_t startIndex,
UErrorCode *status);
/**
* Find the first matching substring of the input string that matches the pattern.
* If startIndex is >= zero the search for a match begins at the specified index,
* and any match region is reset. This corresponds directly with
* Matcher.find(startIndex) in Java.
*
* If startIndex == -1 the search begins at the start of the input region,
* or at the start of the full string if no region has been specified.
*
* If a match is found, <code>uregex_start(), uregex_end()</code>, and
* <code>uregex_group()</code> will provide more information regarding the match.
*
* @param regexp The compiled regular expression.
* @param startIndex The position (native) in the input string to begin the search, or
* -1 to search within the Input Region.
* @param status A reference to a UErrorCode to receive any errors.
* @return TRUE if a match is found.
* @stable ICU 3.0
*/
U_STABLE UBool U_EXPORT2
uregex_find(URegularExpression *regexp,
int32_t startIndex,
UErrorCode *status);
/**
* 64bit version of uregex_find.
* Find the first matching substring of the input string that matches the pattern.
* If startIndex is >= zero the search for a match begins at the specified index,
* and any match region is reset. This corresponds directly with
* Matcher.find(startIndex) in Java.
*
* If startIndex == -1 the search begins at the start of the input region,
* or at the start of the full string if no region has been specified.
*
* If a match is found, <code>uregex_start(), uregex_end()</code>, and
* <code>uregex_group()</code> will provide more information regarding the match.
*
* @param regexp The compiled regular expression.
* @param startIndex The position (native) in the input string to begin the search, or
* -1 to search within the Input Region.
* @param status A reference to a UErrorCode to receive any errors.
* @return TRUE if a match is found.
* @draft ICU 4.6
*/
U_DRAFT UBool U_EXPORT2
uregex_find64(URegularExpression *regexp,
int64_t startIndex,
UErrorCode *status);
/**
* Find the next pattern match in the input string. Begin searching
* the input at the location following the end of he previous match,
* or at the start of the string (or region) if there is no
* previous match. If a match is found, <code>uregex_start(), uregex_end()</code>, and
* <code>uregex_group()</code> will provide more information regarding the match.
*
* @param regexp The compiled regular expression.
* @param status A reference to a UErrorCode to receive any errors.
* @return TRUE if a match is found.
* @see uregex_reset
* @stable ICU 3.0
*/
U_STABLE UBool U_EXPORT2
uregex_findNext(URegularExpression *regexp,
UErrorCode *status);
/**
* Get the number of capturing groups in this regular expression's pattern.
* @param regexp The compiled regular expression.
* @param status A reference to a UErrorCode to receive any errors.
* @return the number of capture groups
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_groupCount(URegularExpression *regexp,
UErrorCode *status);
/** Extract the string for the specified matching expression or subexpression.
* Group #0 is the complete string of matched text.
* Group #1 is the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group to extract. Group 0 is the complete
* match. The value of this parameter must be
* less than or equal to the number of capture groups in
* the pattern.
* @param dest Buffer to receive the matching string data
* @param destCapacity Capacity of the dest buffer.
* @param status A reference to a UErrorCode to receive any errors.
* @return Length of matching data,
* or -1 if no applicable match.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_group(URegularExpression *regexp,
int32_t groupNum,
UChar *dest,
int32_t destCapacity,
UErrorCode *status);
/** Returns a shallow immutable clone of the entire input string. The returned UText current native index
* is set to the beginning of the requested capture group. The capture group length is also
* returned via groupLength.
* Group #0 is the complete string of matched text.
* Group #1 is the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group to extract. Group 0 is the complete
* match. The value of this parameter must be
* less than or equal to the number of capture groups in
* the pattern.
* @param dest A mutable UText in which to store the current input.
* If NULL, a new UText will be created as an immutable shallow clone
* of the entire input string.
* @param groupLength The group length of the desired capture group.
* @param status A reference to a UErrorCode to receive any errors.
* @return The subject text currently associated with this regular expression.
* If a pre-allocated UText was provided, it will always be used and returned.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_groupUText(URegularExpression *regexp,
int32_t groupNum,
UText *dest,
int64_t *groupLength,
UErrorCode *status);
/** Extract the string for the specified matching expression or subexpression.
* Group #0 is the complete string of matched text.
* Group #1 is the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group to extract. Group 0 is the complete
* match. The value of this parameter must be
* less than or equal to the number of capture groups in
* the pattern.
* @param dest Mutable UText to receive the matching string data.
* If NULL, a new UText will be created (which may not be mutable).
* @param status A reference to a UErrorCode to receive any errors.
* @return The matching string data. If a pre-allocated UText was provided,
* it will always be used and returned.
*
* @internal ICU 4.4 technology preview
*/
U_INTERNAL UText * U_EXPORT2
uregex_groupUTextDeep(URegularExpression *regexp,
int32_t groupNum,
UText *dest,
UErrorCode *status);
/**
* Returns the index in the input string of the start of the text matched by the
* specified capture group during the previous match operation. Return -1 if
* the capture group was not part of the last match.
* Group #0 refers to the complete range of matched text.
* Group #1 refers to the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group number
* @param status A reference to a UErrorCode to receive any errors.
* @return the starting (native) position in the input of the text matched
* by the specified group.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_start(URegularExpression *regexp,
int32_t groupNum,
UErrorCode *status);
/**
* 64bit version of uregex_start.
* Returns the index in the input string of the start of the text matched by the
* specified capture group during the previous match operation. Return -1 if
* the capture group was not part of the last match.
* Group #0 refers to the complete range of matched text.
* Group #1 refers to the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group number
* @param status A reference to a UErrorCode to receive any errors.
* @return the starting (native) position in the input of the text matched
* by the specified group.
* @draft ICU 4.6
*/
U_DRAFT int64_t U_EXPORT2
uregex_start64(URegularExpression *regexp,
int32_t groupNum,
UErrorCode *status);
/**
* Returns the index in the input string of the position following the end
* of the text matched by the specified capture group.
* Return -1 if the capture group was not part of the last match.
* Group #0 refers to the complete range of matched text.
* Group #1 refers to the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group number
* @param status A reference to a UErrorCode to receive any errors.
* @return the (native) index of the position following the last matched character.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_end(URegularExpression *regexp,
int32_t groupNum,
UErrorCode *status);
/**
* 64bit version of uregex_end.
* Returns the index in the input string of the position following the end
* of the text matched by the specified capture group.
* Return -1 if the capture group was not part of the last match.
* Group #0 refers to the complete range of matched text.
* Group #1 refers to the text matched by the first set of capturing parentheses.
*
* @param regexp The compiled regular expression.
* @param groupNum The capture group number
* @param status A reference to a UErrorCode to receive any errors.
* @return the (native) index of the position following the last matched character.
* @draft ICU 4.6
*/
U_DRAFT int64_t U_EXPORT2
uregex_end64(URegularExpression *regexp,
int32_t groupNum,
UErrorCode *status);
/**
* Reset any saved state from the previous match. Has the effect of
* causing uregex_findNext to begin at the specified index, and causing
* uregex_start(), uregex_end() and uregex_group() to return an error
* indicating that there is no match information available. Clears any
* match region that may have been set.
*
* @param regexp The compiled regular expression.
* @param index The position (native) in the text at which a
* uregex_findNext() should begin searching.
* @param status A reference to a UErrorCode to receive any errors.
* @stable ICU 3.0
*/
U_STABLE void U_EXPORT2
uregex_reset(URegularExpression *regexp,
int32_t index,
UErrorCode *status);
/**
* 64bit version of uregex_reset.
* Reset any saved state from the previous match. Has the effect of
* causing uregex_findNext to begin at the specified index, and causing
* uregex_start(), uregex_end() and uregex_group() to return an error
* indicating that there is no match information available. Clears any
* match region that may have been set.
*
* @param regexp The compiled regular expression.
* @param index The position (native) in the text at which a
* uregex_findNext() should begin searching.
* @param status A reference to a UErrorCode to receive any errors.
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_reset64(URegularExpression *regexp,
int64_t index,
UErrorCode *status);
/**
* Sets the limits of the matching region for this URegularExpression.
* The region is the part of the input string that will be considered when matching.
* Invoking this method resets any saved state from the previous match,
* then sets the region to start at the index specified by the start parameter
* and end at the index specified by the end parameter.
*
* Depending on the transparency and anchoring being used (see useTransparentBounds
* and useAnchoringBounds), certain constructs such as anchors may behave differently
* at or around the boundaries of the region
*
* The function will fail if start is greater than limit, or if either index
* is less than zero or greater than the length of the string being matched.
*
* @param regexp The compiled regular expression.
* @param regionStart The (native) index to begin searches at.
* @param regionLimit The (native) index to end searches at (exclusive).
* @param status A pointer to a UErrorCode to receive any errors.
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_setRegion(URegularExpression *regexp,
int32_t regionStart,
int32_t regionLimit,
UErrorCode *status);
/**
* 64bit version of uregex_setRegion.
* Sets the limits of the matching region for this URegularExpression.
* The region is the part of the input string that will be considered when matching.
* Invoking this method resets any saved state from the previous match,
* then sets the region to start at the index specified by the start parameter
* and end at the index specified by the end parameter.
*
* Depending on the transparency and anchoring being used (see useTransparentBounds
* and useAnchoringBounds), certain constructs such as anchors may behave differently
* at or around the boundaries of the region
*
* The function will fail if start is greater than limit, or if either index
* is less than zero or greater than the length of the string being matched.
*
* @param regexp The compiled regular expression.
* @param regionStart The (native) index to begin searches at.
* @param regionLimit The (native) index to end searches at (exclusive).
* @param status A pointer to a UErrorCode to receive any errors.
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_setRegion64(URegularExpression *regexp,
int64_t regionStart,
int64_t regionLimit,
UErrorCode *status);
/**
* Set the matching region and the starting index for subsequent matches
* in a single operation.
* This is useful because the usual function for setting the starting
* index, urgex_reset(), also resets any region limits.
*
* @param regexp The compiled regular expression.
* @param regionStart The (native) index to begin searches at.
* @param regionLimit The (native) index to end searches at (exclusive).
* @param startIndex The index in the input text at which the next
* match operation should begin.
* @param status A pointer to a UErrorCode to receive any errors.
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_setRegionAndStart(URegularExpression *regexp,
int64_t regionStart,
int64_t regionLimit,
int64_t startIndex,
UErrorCode *status);
/**
* Reports the start index of the matching region. Any matches found are limited to
* to the region bounded by regionStart (inclusive) and regionEnd (exclusive).
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return The starting (native) index of this matcher's region.
* @stable ICU 4.0
*/
U_STABLE int32_t U_EXPORT2
uregex_regionStart(const URegularExpression *regexp,
UErrorCode *status);
/**
* 64bit version of uregex_regionStart.
* Reports the start index of the matching region. Any matches found are limited to
* to the region bounded by regionStart (inclusive) and regionEnd (exclusive).
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return The starting (native) index of this matcher's region.
* @draft ICU 4.6
*/
U_DRAFT int64_t U_EXPORT2
uregex_regionStart64(const URegularExpression *regexp,
UErrorCode *status);
/**
* Reports the end index (exclusive) of the matching region for this URegularExpression.
* Any matches found are limited to to the region bounded by regionStart (inclusive)
* and regionEnd (exclusive).
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return The ending point (native) of this matcher's region.
* @stable ICU 4.0
*/
U_STABLE int32_t U_EXPORT2
uregex_regionEnd(const URegularExpression *regexp,
UErrorCode *status);
/**
* 64bit version of uregex_regionEnd.
* Reports the end index (exclusive) of the matching region for this URegularExpression.
* Any matches found are limited to to the region bounded by regionStart (inclusive)
* and regionEnd (exclusive).
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return The ending point (native) of this matcher's region.
* @draft ICU 4.6
*/
U_DRAFT int64_t U_EXPORT2
uregex_regionEnd64(const URegularExpression *regexp,
UErrorCode *status);
/**
* Queries the transparency of region bounds for this URegularExpression.
* See useTransparentBounds for a description of transparent and opaque bounds.
* By default, matching boundaries are opaque.
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return TRUE if this matcher is using opaque bounds, false if it is not.
* @stable ICU 4.0
*/
U_STABLE UBool U_EXPORT2
uregex_hasTransparentBounds(const URegularExpression *regexp,
UErrorCode *status);
/**
* Sets the transparency of region bounds for this URegularExpression.
* Invoking this function with an argument of TRUE will set matches to use transparent bounds.
* If the boolean argument is FALSE, then opaque bounds will be used.
*
* Using transparent bounds, the boundaries of the matching region are transparent
* to lookahead, lookbehind, and boundary matching constructs. Those constructs can
* see text beyond the boundaries of the region while checking for a match.
*
* With opaque bounds, no text outside of the matching region is visible to lookahead,
* lookbehind, and boundary matching constructs.
*
* By default, opaque bounds are used.
*
* @param regexp The compiled regular expression.
* @param b TRUE for transparent bounds; FALSE for opaque bounds
* @param status A pointer to a UErrorCode to receive any errors.
* @stable ICU 4.0
**/
U_STABLE void U_EXPORT2
uregex_useTransparentBounds(URegularExpression *regexp,
UBool b,
UErrorCode *status);
/**
* Return true if this URegularExpression is using anchoring bounds.
* By default, anchoring region bounds are used.
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return TRUE if this matcher is using anchoring bounds.
* @stable ICU 4.0
*/
U_STABLE UBool U_EXPORT2
uregex_hasAnchoringBounds(const URegularExpression *regexp,
UErrorCode *status);
/**
* Set whether this URegularExpression is using Anchoring Bounds for its region.
* With anchoring bounds, pattern anchors such as ^ and $ will match at the start
* and end of the region. Without Anchoring Bounds, anchors will only match at
* the positions they would in the complete text.
*
* Anchoring Bounds are the default for regions.
*
* @param regexp The compiled regular expression.
* @param b TRUE if to enable anchoring bounds; FALSE to disable them.
* @param status A pointer to a UErrorCode to receive any errors.
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_useAnchoringBounds(URegularExpression *regexp,
UBool b,
UErrorCode *status);
/**
* Return TRUE if the most recent matching operation touched the
* end of the text being processed. In this case, additional input text could
* change the results of that match.
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return TRUE if the most recent match hit the end of input
* @stable ICU 4.0
*/
U_STABLE UBool U_EXPORT2
uregex_hitEnd(const URegularExpression *regexp,
UErrorCode *status);
/**
* Return TRUE the most recent match succeeded and additional input could cause
* it to fail. If this function returns false and a match was found, then more input
* might change the match but the match won't be lost. If a match was not found,
* then requireEnd has no meaning.
*
* @param regexp The compiled regular expression.
* @param status A pointer to a UErrorCode to receive any errors.
* @return TRUE if more input could cause the most recent match to no longer match.
* @stable ICU 4.0
*/
U_STABLE UBool U_EXPORT2
uregex_requireEnd(const URegularExpression *regexp,
UErrorCode *status);
/**
* Replaces every substring of the input that matches the pattern
* with the given replacement string. This is a convenience function that
* provides a complete find-and-replace-all operation.
*
* This method scans the input string looking for matches of the pattern.
* Input that is not part of any match is copied unchanged to the
* destination buffer. Matched regions are replaced in the output
* buffer by the replacement string. The replacement string may contain
* references to capture groups; these take the form of $1, $2, etc.
*
* @param regexp The compiled regular expression.
* @param replacementText A string containing the replacement text.
* @param replacementLength The length of the replacement string, or
* -1 if it is NUL terminated.
* @param destBuf A (UChar *) buffer that will receive the result.
* @param destCapacity The capacity of the destination buffer.
* @param status A reference to a UErrorCode to receive any errors.
* @return The length of the string resulting from the find
* and replace operation. In the event that the
* destination capacity is inadequate, the return value
* is still the full length of the untruncated string.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_replaceAll(URegularExpression *regexp,
const UChar *replacementText,
int32_t replacementLength,
UChar *destBuf,
int32_t destCapacity,
UErrorCode *status);
/**
* Replaces every substring of the input that matches the pattern
* with the given replacement string. This is a convenience function that
* provides a complete find-and-replace-all operation.
*
* This method scans the input string looking for matches of the pattern.
* Input that is not part of any match is copied unchanged to the
* destination buffer. Matched regions are replaced in the output
* buffer by the replacement string. The replacement string may contain
* references to capture groups; these take the form of $1, $2, etc.
*
* @param regexp The compiled regular expression.
* @param replacement A string containing the replacement text.
* @param dest A mutable UText that will receive the result.
* If NULL, a new UText will be created (which may not be mutable).
* @param status A reference to a UErrorCode to receive any errors.
* @return A UText containing the results of the find and replace.
* If a pre-allocated UText was provided, it will always be used and returned.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_replaceAllUText(URegularExpression *regexp,
UText *replacement,
UText *dest,
UErrorCode *status);
/**
* Replaces the first substring of the input that matches the pattern
* with the given replacement string. This is a convenience function that
* provides a complete find-and-replace operation.
*
* This method scans the input string looking for a match of the pattern.
* All input that is not part of the match is copied unchanged to the
* destination buffer. The matched region is replaced in the output
* buffer by the replacement string. The replacement string may contain
* references to capture groups; these take the form of $1, $2, etc.
*
* @param regexp The compiled regular expression.
* @param replacementText A string containing the replacement text.
* @param replacementLength The length of the replacement string, or
* -1 if it is NUL terminated.
* @param destBuf A (UChar *) buffer that will receive the result.
* @param destCapacity The capacity of the destination buffer.
* @param status a reference to a UErrorCode to receive any errors.
* @return The length of the string resulting from the find
* and replace operation. In the event that the
* destination capacity is inadequate, the return value
* is still the full length of the untruncated string.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_replaceFirst(URegularExpression *regexp,
const UChar *replacementText,
int32_t replacementLength,
UChar *destBuf,
int32_t destCapacity,
UErrorCode *status);
/**
* Replaces the first substring of the input that matches the pattern
* with the given replacement string. This is a convenience function that
* provides a complete find-and-replace operation.
*
* This method scans the input string looking for a match of the pattern.
* All input that is not part of the match is copied unchanged to the
* destination buffer. The matched region is replaced in the output
* buffer by the replacement string. The replacement string may contain
* references to capture groups; these take the form of $1, $2, etc.
*
* @param regexp The compiled regular expression.
* @param replacement A string containing the replacement text.
* @param dest A mutable UText that will receive the result.
* If NULL, a new UText will be created (which may not be mutable).
* @param status A reference to a UErrorCode to receive any errors.
* @return A UText containing the results of the find and replace.
* If a pre-allocated UText was provided, it will always be used and returned.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_replaceFirstUText(URegularExpression *regexp,
UText *replacement,
UText *dest,
UErrorCode *status);
/**
* Implements a replace operation intended to be used as part of an
* incremental find-and-replace.
*
* <p>The input string, starting from the end of the previous match and ending at
* the start of the current match, is appended to the destination string. Then the
* replacement string is appended to the output string,
* including handling any substitutions of captured text.</p>
*
* <p>A note on preflight computation of buffersize and error handling:
* Calls to uregex_appendReplacement() and uregex_appendTail() are
* designed to be chained, one after another, with the destination
* buffer pointer and buffer capacity updated after each in preparation
* to for the next. If the destination buffer is exhausted partway through such a
* sequence, a U_BUFFER_OVERFLOW_ERROR status will be returned. Normal
* ICU conventions are for a function to perform no action if it is
* called with an error status, but for this one case, uregex_appendRepacement()
* will operate normally so that buffer size computations will complete
* correctly.
*
* <p>For simple, prepackaged, non-incremental find-and-replace
* operations, see replaceFirst() or replaceAll().</p>
*
* @param regexp The regular expression object.
* @param replacementText The string that will replace the matched portion of the
* input string as it is copied to the destination buffer.
* The replacement text may contain references ($1, for
* example) to capture groups from the match.
* @param replacementLength The length of the replacement text string,
* or -1 if the string is NUL terminated.
* @param destBuf The buffer into which the results of the
* find-and-replace are placed. On return, this pointer
* will be updated to refer to the beginning of the
* unused portion of buffer, leaving it in position for
* a subsequent call to this function.
* @param destCapacity The size of the output buffer, On return, this
* parameter will be updated to reflect the space remaining
* unused in the output buffer.
* @param status A reference to a UErrorCode to receive any errors.
* @return The length of the result string. In the event that
* destCapacity is inadequate, the full length of the
* untruncated output string is returned.
*
* @stable ICU 3.0
*
*/
U_STABLE int32_t U_EXPORT2
uregex_appendReplacement(URegularExpression *regexp,
const UChar *replacementText,
int32_t replacementLength,
UChar **destBuf,
int32_t *destCapacity,
UErrorCode *status);
/**
* Implements a replace operation intended to be used as part of an
* incremental find-and-replace.
*
* <p>The input string, starting from the end of the previous match and ending at
* the start of the current match, is appended to the destination string. Then the
* replacement string is appended to the output string,
* including handling any substitutions of captured text.</p>
*
* <p>For simple, prepackaged, non-incremental find-and-replace
* operations, see replaceFirst() or replaceAll().</p>
*
* @param regexp The regular expression object.
* @param replacementText The string that will replace the matched portion of the
* input string as it is copied to the destination buffer.
* The replacement text may contain references ($1, for
* example) to capture groups from the match.
* @param dest A mutable UText that will receive the result. Must not be NULL.
* @param status A reference to a UErrorCode to receive any errors.
*
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_appendReplacementUText(URegularExpression *regexp,
UText *replacementText,
UText *dest,
UErrorCode *status);
/**
* As the final step in a find-and-replace operation, append the remainder
* of the input string, starting at the position following the last match,
* to the destination string. <code>uregex_appendTail()</code> is intended
* to be invoked after one or more invocations of the
* <code>uregex_appendReplacement()</code> function.
*
* @param regexp The regular expression object. This is needed to
* obtain the input string and with the position
* of the last match within it.
* @param destBuf The buffer in which the results of the
* find-and-replace are placed. On return, the pointer
* will be updated to refer to the beginning of the
* unused portion of buffer.
* @param destCapacity The size of the output buffer, On return, this
* value will be updated to reflect the space remaining
* unused in the output buffer.
* @param status A reference to a UErrorCode to receive any errors.
* @return The length of the result string. In the event that
* destCapacity is inadequate, the full length of the
* untruncated output string is returned.
*
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_appendTail(URegularExpression *regexp,
UChar **destBuf,
int32_t *destCapacity,
UErrorCode *status);
/**
* As the final step in a find-and-replace operation, append the remainder
* of the input string, starting at the position following the last match,
* to the destination string. <code>uregex_appendTailUText()</code> is intended
* to be invoked after one or more invocations of the
* <code>uregex_appendReplacementUText()</code> function.
*
* @param regexp The regular expression object. This is needed to
* obtain the input string and with the position
* of the last match within it.
* @param dest A mutable UText that will receive the result. Must not be NULL.
*
* @param status Error code
*
* @return The destination UText.
*
* @draft ICU 4.6
*/
U_DRAFT UText * U_EXPORT2
uregex_appendTailUText(URegularExpression *regexp,
UText *dest,
UErrorCode *status);
/**
* Split a string into fields. Somewhat like split() from Perl.
* The pattern matches identify delimiters that separate the input
* into fields. The input data between the matches becomes the
* fields themselves.
*
* Each of the fields is copied from the input string to the destination
* buffer, and NUL terminated. The position of each field within
* the destination buffer is returned in the destFields array.
*
* If the delimiter pattern includes capture groups, the captured text will
* also appear in the destination array of output strings, interspersed
* with the fields. This is similar to Perl, but differs from Java,
* which ignores the presence of capture groups in the pattern.
*
* Trailing empty fields will always be returned, assuming sufficient
* destination capacity. This differs from the default behavior for Java
* and Perl where trailing empty fields are not returned.
*
* The number of strings produced by the split operation is returned.
* This count includes the strings from capture groups in the delimiter pattern.
* This behavior differs from Java, which ignores capture groups.
*
* @param regexp The compiled regular expression.
* @param destBuf A (UChar *) buffer to receive the fields that
* are extracted from the input string. These
* field pointers will refer to positions within the
* destination buffer supplied by the caller. Any
* extra positions within the destFields array will be
* set to NULL.
* @param destCapacity The capacity of the destBuf.
* @param requiredCapacity The actual capacity required of the destBuf.
* If destCapacity is too small, requiredCapacity will return
* the total capacity required to hold all of the output, and
* a U_BUFFER_OVERFLOW_ERROR will be returned.
* @param destFields An array to be filled with the position of each
* of the extracted fields within destBuf.
* @param destFieldsCapacity The number of elements in the destFields array.
* If the number of fields found is less than destFieldsCapacity,
* the extra destFields elements are set to zero.
* If destFieldsCapacity is too small, the trailing part of the
* input, including any field delimiters, is treated as if it
* were the last field - it is copied to the destBuf, and
* its position is in the destBuf is stored in the last element
* of destFields. This behavior mimics that of Perl. It is not
* an error condition, and no error status is returned when all destField
* positions are used.
* @param status A reference to a UErrorCode to receive any errors.
* @return The number of fields into which the input string was split.
* @stable ICU 3.0
*/
U_STABLE int32_t U_EXPORT2
uregex_split( URegularExpression *regexp,
UChar *destBuf,
int32_t destCapacity,
int32_t *requiredCapacity,
UChar *destFields[],
int32_t destFieldsCapacity,
UErrorCode *status);
/**
* Split a string into fields. Somewhat like split() from Perl.
* The pattern matches identify delimiters that separate the input
* into fields. The input data between the matches becomes the
* fields themselves.
* <p>
* The behavior of this function is not very closely aligned with uregex_split();
* instead, it is based on (and implemented directly on top of) the C++ split method.
*
* @param regexp The compiled regular expression.
* @param destFields An array of mutable UText structs to receive the results of the split.
* If a field is NULL, a new UText is allocated to contain the results for
* that field. This new UText is not guaranteed to be mutable.
* @param destFieldsCapacity The number of elements in the destination array.
* If the number of fields found is less than destCapacity, the
* extra strings in the destination array are not altered.
* If the number of destination strings is less than the number
* of fields, the trailing part of the input string, including any
* field delimiters, is placed in the last destination string.
* This behavior mimics that of Perl. It is not an error condition, and no
* error status is returned when all destField positions are used.
* @param status A reference to a UErrorCode to receive any errors.
* @return The number of fields into which the input string was split.
*
* @draft ICU 4.6
*/
U_DRAFT int32_t U_EXPORT2
uregex_splitUText(URegularExpression *regexp,
UText *destFields[],
int32_t destFieldsCapacity,
UErrorCode *status);
/**
* Set a processing time limit for match operations with this URegularExpression.
*
* Some patterns, when matching certain strings, can run in exponential time.
* For practical purposes, the match operation may appear to be in an
* infinite loop.
* When a limit is set a match operation will fail with an error if the
* limit is exceeded.
* <p>
* The units of the limit are steps of the match engine.
* Correspondence with actual processor time will depend on the speed
* of the processor and the details of the specific pattern, but will
* typically be on the order of milliseconds.
* <p>
* By default, the matching time is not limited.
* <p>
*
* @param regexp The compiled regular expression.
* @param limit The limit value, or 0 for no limit.
* @param status A reference to a UErrorCode to receive any errors.
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_setTimeLimit(URegularExpression *regexp,
int32_t limit,
UErrorCode *status);
/**
* Get the time limit for for matches with this URegularExpression.
* A return value of zero indicates that there is no limit.
*
* @param regexp The compiled regular expression.
* @param status A reference to a UErrorCode to receive any errors.
* @return the maximum allowed time for a match, in units of processing steps.
* @stable ICU 4.0
*/
U_STABLE int32_t U_EXPORT2
uregex_getTimeLimit(const URegularExpression *regexp,
UErrorCode *status);
/**
* Set the amount of heap storage available for use by the match backtracking stack.
* <p>
* ICU uses a backtracking regular expression engine, with the backtrack stack
* maintained on the heap. This function sets the limit to the amount of memory
* that can be used for this purpose. A backtracking stack overflow will
* result in an error from the match operation that caused it.
* <p>
* A limit is desirable because a malicious or poorly designed pattern can use
* excessive memory, potentially crashing the process. A limit is enabled
* by default.
* <p>
* @param regexp The compiled regular expression.
* @param limit The maximum size, in bytes, of the matching backtrack stack.
* A value of -1 means no limit.
* The limit must be greater than zero, or -1.
* @param status A reference to a UErrorCode to receive any errors.
*
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_setStackLimit(URegularExpression *regexp,
int32_t limit,
UErrorCode *status);
/**
* Get the size of the heap storage available for use by the back tracking stack.
*
* @return the maximum backtracking stack size, in bytes, or zero if the
* stack size is unlimited.
* @stable ICU 4.0
*/
U_STABLE int32_t U_EXPORT2
uregex_getStackLimit(const URegularExpression *regexp,
UErrorCode *status);
/**
* Function pointer for a regular expression matching callback function.
* When set, a callback function will be called periodically during matching
* operations. If the call back function returns FALSE, the matching
* operation will be terminated early.
*
* Note: the callback function must not call other functions on this
* URegularExpression.
*
* @param context context pointer. The callback function will be invoked
* with the context specified at the time that
* uregex_setMatchCallback() is called.
* @param steps the accumulated processing time, in match steps,
* for this matching operation.
* @return TRUE to continue the matching operation.
* FALSE to terminate the matching operation.
* @stable ICU 4.0
*/
U_CDECL_BEGIN
typedef UBool U_CALLCONV URegexMatchCallback (
const void *context,
int32_t steps);
U_CDECL_END
/**
* Set a callback function for this URegularExpression.
* During matching operations the function will be called periodically,
* giving the application the opportunity to terminate a long-running
* match.
*
* @param regexp The compiled regular expression.
* @param callback A pointer to the user-supplied callback function.
* @param context User context pointer. The value supplied at the
* time the callback function is set will be saved
* and passed to the callback each time that it is called.
* @param status A reference to a UErrorCode to receive any errors.
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_setMatchCallback(URegularExpression *regexp,
URegexMatchCallback *callback,
const void *context,
UErrorCode *status);
/**
* Get the callback function for this URegularExpression.
*
* @param regexp The compiled regular expression.
* @param callback Out parameter, receives a pointer to the user-supplied
* callback function.
* @param context Out parameter, receives the user context pointer that
* was set when uregex_setMatchCallback() was called.
* @param status A reference to a UErrorCode to receive any errors.
* @stable ICU 4.0
*/
U_STABLE void U_EXPORT2
uregex_getMatchCallback(const URegularExpression *regexp,
URegexMatchCallback **callback,
const void **context,
UErrorCode *status);
/**
* Function pointer for a regular expression find callback function.
*
* When set, a callback function will be called during a find operation
* and for operations that depend on find, such as findNext, split and some replace
* operations like replaceFirst.
* The callback will usually be called after each attempt at a match, but this is not a
* guarantee that the callback will be invoked at each character. For finds where the
* match engine is invoked at each character, this may be close to true, but less likely
* for more optimized loops where the pattern is known to only start, and the match
* engine invoked, at certain characters.
* When invoked, this callback will specify the index at which a match operation is about
* to be attempted, giving the application the opportunity to terminate a long-running
* find operation.
*
* If the call back function returns FALSE, the find operation will be terminated early.
*
* Note: the callback function must not call other functions on this
* URegularExpression
*
* @param context context pointer. The callback function will be invoked
* with the context specified at the time that
* uregex_setFindProgressCallback() is called.
* @param matchIndex the next index at which a match attempt will be attempted for this
* find operation. If this callback interrupts the search, this is the
* index at which a find/findNext operation may be re-initiated.
* @return TRUE to continue the matching operation.
* FALSE to terminate the matching operation.
* @draft ICU 4.6
*/
U_CDECL_BEGIN
typedef UBool U_CALLCONV URegexFindProgressCallback (
const void *context,
int64_t matchIndex);
U_CDECL_END
/**
* Set the find progress callback function for this URegularExpression.
*
* @param regexp The compiled regular expression.
* @param callback A pointer to the user-supplied callback function.
* @param context User context pointer. The value supplied at the
* time the callback function is set will be saved
* and passed to the callback each time that it is called.
* @param status A reference to a UErrorCode to receive any errors.
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_setFindProgressCallback(URegularExpression *regexp,
URegexFindProgressCallback *callback,
const void *context,
UErrorCode *status);
/**
* Get the find progress callback function for this URegularExpression.
*
* @param regexp The compiled regular expression.
* @param callback Out parameter, receives a pointer to the user-supplied
* callback function.
* @param context Out parameter, receives the user context pointer that
* was set when uregex_setFindProgressCallback() was called.
* @param status A reference to a UErrorCode to receive any errors.
* @draft ICU 4.6
*/
U_DRAFT void U_EXPORT2
uregex_getFindProgressCallback(const URegularExpression *regexp,
URegexFindProgressCallback **callback,
const void **context,
UErrorCode *status);
#endif /* !UCONFIG_NO_REGULAR_EXPRESSIONS */
#endif /* UREGEX_H */
|