| 1 | /* regcomp.h |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | * 2000, 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #ifndef PERL_REGCOMP_H_ |
| 12 | #define PERL_REGCOMP_H_ |
| 13 | |
| 14 | #include "regcharclass.h" |
| 15 | |
| 16 | /* Convert branch sequences to more efficient trie ops? */ |
| 17 | #define PERL_ENABLE_TRIE_OPTIMISATION 1 |
| 18 | |
| 19 | /* Be really aggressive about optimising patterns with trie sequences? */ |
| 20 | #define PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION 1 |
| 21 | |
| 22 | /* Should the optimiser take positive assertions into account? */ |
| 23 | #define PERL_ENABLE_POSITIVE_ASSERTION_STUDY 0 |
| 24 | |
| 25 | /* Not for production use: */ |
| 26 | #define PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS 0 |
| 27 | |
| 28 | /* Activate offsets code - set to if 1 to enable */ |
| 29 | #ifdef DEBUGGING |
| 30 | #define RE_TRACK_PATTERN_OFFSETS |
| 31 | #endif |
| 32 | |
| 33 | /* |
| 34 | * Structure for regexp "program". This is essentially a linear encoding |
| 35 | * of a nondeterministic finite-state machine (aka syntax charts or |
| 36 | * "railroad normal form" in parsing technology). Each node is an opcode |
| 37 | * plus a "next" pointer, possibly plus an operand. "Next" pointers of |
| 38 | * all nodes except BRANCH implement concatenation; a "next" pointer with |
| 39 | * a BRANCH on both ends of it is connecting two alternatives. (Here we |
| 40 | * have one of the subtle syntax dependencies: an individual BRANCH (as |
| 41 | * opposed to a collection of them) is never concatenated with anything |
| 42 | * because of operator precedence.) The operand of some types of node is |
| 43 | * a literal string; for others, it is a node leading into a sub-FSM. In |
| 44 | * particular, the operand of a BRANCH node is the first node of the branch. |
| 45 | * (NB this is *not* a tree structure: the tail of the branch connects |
| 46 | * to the thing following the set of BRANCHes.) The opcodes are defined |
| 47 | * in regnodes.h which is generated from regcomp.sym by regcomp.pl. |
| 48 | */ |
| 49 | |
| 50 | /* |
| 51 | * A node is one char of opcode followed by two chars of "next" pointer. |
| 52 | * "Next" pointers are stored as two 8-bit pieces, high order first. The |
| 53 | * value is a positive offset from the opcode of the node containing it. |
| 54 | * An operand, if any, simply follows the node. (Note that much of the |
| 55 | * code generation knows about this implicit relationship.) |
| 56 | * |
| 57 | * Using two bytes for the "next" pointer is vast overkill for most things, |
| 58 | * but allows patterns to get big without disasters. |
| 59 | * |
| 60 | * [The "next" pointer is always aligned on an even |
| 61 | * boundary, and reads the offset directly as a short.] |
| 62 | */ |
| 63 | |
| 64 | /* This is the stuff that used to live in regexp.h that was truly |
| 65 | private to the engine itself. It now lives here. */ |
| 66 | |
| 67 | typedef struct regexp_internal { |
| 68 | union { |
| 69 | U32 *offsets; /* offset annotations 20001228 MJD |
| 70 | data about mapping the program to the |
| 71 | string - |
| 72 | offsets[0] is proglen when this is used |
| 73 | */ |
| 74 | U32 proglen; |
| 75 | } u; |
| 76 | |
| 77 | regnode *regstclass; /* Optional startclass as identified or constructed |
| 78 | by the optimiser */ |
| 79 | struct reg_data *data; /* Additional miscellaneous data used by the program. |
| 80 | Used to make it easier to clone and free arbitrary |
| 81 | data that the regops need. Often the ARG field of |
| 82 | a regop is an index into this structure */ |
| 83 | struct reg_code_blocks *code_blocks;/* positions of literal (?{}) */ |
| 84 | int name_list_idx; /* Optional data index of an array of paren names */ |
| 85 | regnode program[1]; /* Unwarranted chumminess with compiler. */ |
| 86 | } regexp_internal; |
| 87 | |
| 88 | #define RXi_SET(x,y) (x)->pprivate = (void*)(y) |
| 89 | #define RXi_GET(x) ((regexp_internal *)((x)->pprivate)) |
| 90 | #define RXi_GET_DECL(r,ri) regexp_internal *ri = RXi_GET(r) |
| 91 | /* |
| 92 | * Flags stored in regexp->intflags |
| 93 | * These are used only internally to the regexp engine |
| 94 | * |
| 95 | * See regexp.h for flags used externally to the regexp engine |
| 96 | */ |
| 97 | #define RXp_INTFLAGS(rx) ((rx)->intflags) |
| 98 | #define RX_INTFLAGS(prog) RXp_INTFLAGS(ReANY(prog)) |
| 99 | |
| 100 | #define PREGf_SKIP 0x00000001 |
| 101 | #define PREGf_IMPLICIT 0x00000002 /* Converted .* to ^.* */ |
| 102 | #define PREGf_NAUGHTY 0x00000004 /* how exponential is this pattern? */ |
| 103 | #define PREGf_VERBARG_SEEN 0x00000008 |
| 104 | #define PREGf_CUTGROUP_SEEN 0x00000010 |
| 105 | #define PREGf_USE_RE_EVAL 0x00000020 /* compiled with "use re 'eval'" */ |
| 106 | /* these used to be extflags, but are now intflags */ |
| 107 | #define PREGf_NOSCAN 0x00000040 |
| 108 | /* spare */ |
| 109 | #define PREGf_GPOS_SEEN 0x00000100 |
| 110 | #define PREGf_GPOS_FLOAT 0x00000200 |
| 111 | |
| 112 | #define PREGf_ANCH_MBOL 0x00000400 |
| 113 | #define PREGf_ANCH_SBOL 0x00000800 |
| 114 | #define PREGf_ANCH_GPOS 0x00001000 |
| 115 | #define PREGf_RECURSE_SEEN 0x00002000 |
| 116 | |
| 117 | #define PREGf_ANCH \ |
| 118 | ( PREGf_ANCH_SBOL | PREGf_ANCH_GPOS | PREGf_ANCH_MBOL ) |
| 119 | |
| 120 | /* this is where the old regcomp.h started */ |
| 121 | |
| 122 | struct regnode_string { |
| 123 | U8 str_len; |
| 124 | U8 type; |
| 125 | U16 next_off; |
| 126 | char string[1]; |
| 127 | }; |
| 128 | |
| 129 | struct regnode_lstring { /* Constructed this way to keep the string aligned. */ |
| 130 | U8 flags; |
| 131 | U8 type; |
| 132 | U16 next_off; |
| 133 | U32 str_len; /* Only 18 bits allowed before would overflow 'next_off' */ |
| 134 | char string[1]; |
| 135 | }; |
| 136 | |
| 137 | struct regnode_anyofhs { /* Constructed this way to keep the string aligned. */ |
| 138 | U8 str_len; |
| 139 | U8 type; |
| 140 | U16 next_off; |
| 141 | U32 arg1; /* set by set_ANYOF_arg() */ |
| 142 | char string[1]; |
| 143 | }; |
| 144 | |
| 145 | /* Argument bearing node - workhorse, |
| 146 | arg1 is often for the data field */ |
| 147 | struct regnode_1 { |
| 148 | U8 flags; |
| 149 | U8 type; |
| 150 | U16 next_off; |
| 151 | U32 arg1; |
| 152 | }; |
| 153 | |
| 154 | /* Node whose argument is 'SV *'. This needs to be used very carefully in |
| 155 | * situations where pointers won't become invalid because of, say re-mallocs */ |
| 156 | struct regnode_p { |
| 157 | U8 flags; |
| 158 | U8 type; |
| 159 | U16 next_off; |
| 160 | SV * arg1; |
| 161 | }; |
| 162 | |
| 163 | /* Similar to a regnode_1 but with an extra signed argument */ |
| 164 | struct regnode_2L { |
| 165 | U8 flags; |
| 166 | U8 type; |
| 167 | U16 next_off; |
| 168 | U32 arg1; |
| 169 | I32 arg2; |
| 170 | }; |
| 171 | |
| 172 | /* 'Two field' -- Two 16 bit unsigned args */ |
| 173 | struct regnode_2 { |
| 174 | U8 flags; |
| 175 | U8 type; |
| 176 | U16 next_off; |
| 177 | U16 arg1; |
| 178 | U16 arg2; |
| 179 | }; |
| 180 | |
| 181 | #define ANYOF_BITMAP_SIZE (NUM_ANYOF_CODE_POINTS / 8) /* 8 bits/Byte */ |
| 182 | |
| 183 | /* Note that these form structs which are supersets of the next smaller one, by |
| 184 | * appending fields. Alignment problems can occur if one of those optional |
| 185 | * fields requires stricter alignment than the base struct. And formal |
| 186 | * parameters that can really be two or more of the structs should be |
| 187 | * declared as the smallest one it could be. See commit message for |
| 188 | * 7dcac5f6a5195002b55c935ee1d67f67e1df280b. Regnode allocation is done |
| 189 | * without regard to alignment, and changing it to would also require changing |
| 190 | * the code that inserts and deletes regnodes. The basic single-argument |
| 191 | * regnode has a U32, which is what reganode() allocates as a unit. Therefore |
| 192 | * no field can require stricter alignment than U32. */ |
| 193 | |
| 194 | /* also used by trie */ |
| 195 | struct regnode_charclass { |
| 196 | U8 flags; |
| 197 | U8 type; |
| 198 | U16 next_off; |
| 199 | U32 arg1; /* set by set_ANYOF_arg() */ |
| 200 | char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */ |
| 201 | }; |
| 202 | |
| 203 | /* has runtime (locale) \d, \w, ..., [:posix:] classes */ |
| 204 | struct regnode_charclass_posixl { |
| 205 | U8 flags; /* ANYOF_MATCHES_POSIXL bit must go here */ |
| 206 | U8 type; |
| 207 | U16 next_off; |
| 208 | U32 arg1; |
| 209 | char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time ... */ |
| 210 | U32 classflags; /* and run-time */ |
| 211 | }; |
| 212 | |
| 213 | /* A synthetic start class (SSC); is a regnode_charclass_posixl_fold, plus an |
| 214 | * extra SV*, used only during its construction and which is not used by |
| 215 | * regexec.c. Note that the 'next_off' field is unused, as the SSC stands |
| 216 | * alone, so there is never a next node. Also, there is no alignment issue, |
| 217 | * because these are declared or allocated as a complete unit so the compiler |
| 218 | * takes care of alignment. This is unlike the other regnodes which are |
| 219 | * allocated in terms of multiples of a single-argument regnode. SSC nodes can |
| 220 | * have a pointer field because there is no alignment issue, and because it is |
| 221 | * set to NULL after construction, before any cloning of the pattern */ |
| 222 | struct regnode_ssc { |
| 223 | U8 flags; /* ANYOF_MATCHES_POSIXL bit must go here */ |
| 224 | U8 type; |
| 225 | U16 next_off; |
| 226 | U32 arg1; |
| 227 | char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time ... */ |
| 228 | U32 classflags; /* ... and run-time */ |
| 229 | |
| 230 | /* Auxiliary, only used during construction; NULL afterwards: list of code |
| 231 | * points matched */ |
| 232 | SV* invlist; |
| 233 | }; |
| 234 | |
| 235 | /* We take advantage of 'next_off' not otherwise being used in the SSC by |
| 236 | * actually using it: by setting it to 1. This allows us to test and |
| 237 | * distinguish between an SSC and other ANYOF node types, as 'next_off' cannot |
| 238 | * otherwise be 1, because it is the offset to the next regnode expressed in |
| 239 | * units of regnodes. Since an ANYOF node contains extra fields, it adds up |
| 240 | * to 12 regnode units on 32-bit systems, (hence the minimum this can be (if |
| 241 | * not 0) is 11 there. Even if things get tightly packed on a 64-bit system, |
| 242 | * it still would be more than 1. */ |
| 243 | #define set_ANYOF_SYNTHETIC(n) STMT_START{ OP(n) = ANYOF; \ |
| 244 | NEXT_OFF(n) = 1; \ |
| 245 | } STMT_END |
| 246 | #define is_ANYOF_SYNTHETIC(n) (PL_regkind[OP(n)] == ANYOF && NEXT_OFF(n) == 1) |
| 247 | |
| 248 | /* XXX fix this description. |
| 249 | Impose a limit of REG_INFTY on various pattern matching operations |
| 250 | to limit stack growth and to avoid "infinite" recursions. |
| 251 | */ |
| 252 | /* The default size for REG_INFTY is U16_MAX, which is the same as |
| 253 | USHORT_MAX (see perl.h). Unfortunately U16 isn't necessarily 16 bits |
| 254 | (see handy.h). On the Cray C90, sizeof(short)==4 and hence U16_MAX is |
| 255 | ((1<<32)-1), while on the Cray T90, sizeof(short)==8 and U16_MAX is |
| 256 | ((1<<64)-1). To limit stack growth to reasonable sizes, supply a |
| 257 | smaller default. |
| 258 | --Andy Dougherty 11 June 1998 |
| 259 | */ |
| 260 | #if SHORTSIZE > 2 |
| 261 | # ifndef REG_INFTY |
| 262 | # define REG_INFTY nBIT_UMAX(16) |
| 263 | # endif |
| 264 | #endif |
| 265 | |
| 266 | #ifndef REG_INFTY |
| 267 | # define REG_INFTY U16_MAX |
| 268 | #endif |
| 269 | |
| 270 | #define ARG_VALUE(arg) (arg) |
| 271 | #define ARG__SET(arg,val) ((arg) = (val)) |
| 272 | |
| 273 | #undef ARG |
| 274 | #undef ARG1 |
| 275 | #undef ARG2 |
| 276 | |
| 277 | #define ARG(p) ARG_VALUE(ARG_LOC(p)) |
| 278 | #define ARGp(p) ARG_VALUE(ARGp_LOC(p)) |
| 279 | #define ARG1(p) ARG_VALUE(ARG1_LOC(p)) |
| 280 | #define ARG2(p) ARG_VALUE(ARG2_LOC(p)) |
| 281 | #define ARG2L(p) ARG_VALUE(ARG2L_LOC(p)) |
| 282 | |
| 283 | #define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val)) |
| 284 | #define ARGp_SET(p, val) ARG__SET(ARGp_LOC(p), (val)) |
| 285 | #define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val)) |
| 286 | #define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val)) |
| 287 | #define ARG2L_SET(p, val) ARG__SET(ARG2L_LOC(p), (val)) |
| 288 | |
| 289 | #undef NEXT_OFF |
| 290 | #undef NODE_ALIGN |
| 291 | |
| 292 | #define NEXT_OFF(p) ((p)->next_off) |
| 293 | #define NODE_ALIGN(node) |
| 294 | /* the following define was set to 0xde in 075abff3 |
| 295 | * as part of some linting logic. I have set it to 0 |
| 296 | * as otherwise in every place where we /might/ set flags |
| 297 | * we have to set it 0 explicitly, which duplicates |
| 298 | * assignments and IMO adds an unacceptable level of |
| 299 | * surprise to working in the regex engine. If this |
| 300 | * is changed from 0 then at the very least make sure |
| 301 | * that SBOL for /^/ sets the flags to 0 explicitly. |
| 302 | * -- Yves */ |
| 303 | #define NODE_ALIGN_FILL(node) ((node)->flags = 0) |
| 304 | |
| 305 | #define SIZE_ALIGN NODE_ALIGN |
| 306 | |
| 307 | #undef OP |
| 308 | #undef OPERAND |
| 309 | #undef STRING |
| 310 | |
| 311 | #define OP(p) ((p)->type) |
| 312 | #define FLAGS(p) ((p)->flags) /* Caution: Doesn't apply to all \ |
| 313 | regnode types. For some, it's the \ |
| 314 | character set of the regnode */ |
| 315 | #define STR_LENs(p) (__ASSERT_(OP(p) != LEXACT && OP(p) != LEXACT_REQ8) \ |
| 316 | ((struct regnode_string *)p)->str_len) |
| 317 | #define STRINGs(p) (__ASSERT_(OP(p) != LEXACT && OP(p) != LEXACT_REQ8) \ |
| 318 | ((struct regnode_string *)p)->string) |
| 319 | #define OPERANDs(p) STRINGs(p) |
| 320 | |
| 321 | /* Long strings. Currently limited to length 18 bits, which handles a 262000 |
| 322 | * byte string. The limiting factor is the 16 bit 'next_off' field, which |
| 323 | * points to the next regnode, so the furthest away it can be is 2**16. On |
| 324 | * most architectures, regnodes are 2**2 bytes long, so that yields 2**18 |
| 325 | * bytes. Should a longer string be desired, we could increase it to 26 bits |
| 326 | * fairly easily, by changing this node to have longj type which causes the ARG |
| 327 | * field to be used for the link to the next regnode (although code would have |
| 328 | * to be changed to account for this), and then use a combination of the flags |
| 329 | * and next_off fields for the length. To get 34 bit length, also change the |
| 330 | * node to be an ARG2L, using the second 32 bit field for the length, and not |
| 331 | * using the flags nor next_off fields at all. One could have an llstring node |
| 332 | * and even an lllstring type. */ |
| 333 | #define STR_LENl(p) (__ASSERT_(OP(p) == LEXACT || OP(p) == LEXACT_REQ8) \ |
| 334 | (((struct regnode_lstring *)p)->str_len)) |
| 335 | #define STRINGl(p) (__ASSERT_(OP(p) == LEXACT || OP(p) == LEXACT_REQ8) \ |
| 336 | (((struct regnode_lstring *)p)->string)) |
| 337 | #define OPERANDl(p) STRINGl(p) |
| 338 | |
| 339 | #define STR_LEN(p) ((OP(p) == LEXACT || OP(p) == LEXACT_REQ8) \ |
| 340 | ? STR_LENl(p) : STR_LENs(p)) |
| 341 | #define STRING(p) ((OP(p) == LEXACT || OP(p) == LEXACT_REQ8) \ |
| 342 | ? STRINGl(p) : STRINGs(p)) |
| 343 | #define OPERAND(p) STRING(p) |
| 344 | |
| 345 | /* The number of (smallest) regnode equivalents that a string of length l bytes |
| 346 | * occupies */ |
| 347 | #define STR_SZ(l) (((l) + sizeof(regnode) - 1) / sizeof(regnode)) |
| 348 | |
| 349 | /* The number of (smallest) regnode equivalents that the EXACTISH node 'p' |
| 350 | * occupies */ |
| 351 | #define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p)) + 1 + regarglen[(p)->type]) |
| 352 | |
| 353 | #define setSTR_LEN(p,v) \ |
| 354 | STMT_START{ \ |
| 355 | if (OP(p) == LEXACT || OP(p) == LEXACT_REQ8) \ |
| 356 | ((struct regnode_lstring *)(p))->str_len = (v); \ |
| 357 | else \ |
| 358 | ((struct regnode_string *)(p))->str_len = (v); \ |
| 359 | } STMT_END |
| 360 | |
| 361 | #define ANYOFR_BASE_BITS 20 |
| 362 | #define ANYOFRbase(p) (ARG(p) & nBIT_MASK(ANYOFR_BASE_BITS)) |
| 363 | #define ANYOFRdelta(p) (ARG(p) >> ANYOFR_BASE_BITS) |
| 364 | |
| 365 | #undef NODE_ALIGN |
| 366 | #undef ARG_LOC |
| 367 | #undef NEXTOPER |
| 368 | #undef PREVOPER |
| 369 | |
| 370 | #define NODE_ALIGN(node) |
| 371 | #define ARG_LOC(p) (((struct regnode_1 *)p)->arg1) |
| 372 | #define ARGp_LOC(p) (((struct regnode_p *)p)->arg1) |
| 373 | #define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1) |
| 374 | #define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2) |
| 375 | #define ARG2L_LOC(p) (((struct regnode_2L *)p)->arg2) |
| 376 | |
| 377 | #define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */ |
| 378 | #define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2) |
| 379 | |
| 380 | #define NEXTOPER(p) ((p) + NODE_STEP_REGNODE) |
| 381 | #define PREVOPER(p) ((p) - NODE_STEP_REGNODE) |
| 382 | |
| 383 | #define FILL_NODE(offset, op) \ |
| 384 | STMT_START { \ |
| 385 | OP(REGNODE_p(offset)) = op; \ |
| 386 | NEXT_OFF(REGNODE_p(offset)) = 0; \ |
| 387 | } STMT_END |
| 388 | #define FILL_ADVANCE_NODE(offset, op) \ |
| 389 | STMT_START { \ |
| 390 | FILL_NODE(offset, op); \ |
| 391 | (offset)++; \ |
| 392 | } STMT_END |
| 393 | #define FILL_ADVANCE_NODE_ARG(offset, op, arg) \ |
| 394 | STMT_START { \ |
| 395 | ARG_SET(REGNODE_p(offset), arg); \ |
| 396 | FILL_ADVANCE_NODE(offset, op); \ |
| 397 | /* This is used generically for other operations \ |
| 398 | * that have a longer argument */ \ |
| 399 | (offset) += regarglen[op]; \ |
| 400 | } STMT_END |
| 401 | #define FILL_ADVANCE_NODE_ARGp(offset, op, arg) \ |
| 402 | STMT_START { \ |
| 403 | ARGp_SET(REGNODE_p(offset), arg); \ |
| 404 | FILL_ADVANCE_NODE(offset, op); \ |
| 405 | (offset) += regarglen[op]; \ |
| 406 | } STMT_END |
| 407 | #define FILL_ADVANCE_NODE_2L_ARG(offset, op, arg1, arg2) \ |
| 408 | STMT_START { \ |
| 409 | ARG_SET(REGNODE_p(offset), arg1); \ |
| 410 | ARG2L_SET(REGNODE_p(offset), arg2); \ |
| 411 | FILL_ADVANCE_NODE(offset, op); \ |
| 412 | (offset) += 2; \ |
| 413 | } STMT_END |
| 414 | |
| 415 | #define REG_MAGIC 0234 |
| 416 | |
| 417 | /* An ANYOF node is basically a bitmap with the index being a code point. If |
| 418 | * the bit for that code point is 1, the code point matches; if 0, it doesn't |
| 419 | * match (complemented if inverted). There is an additional mechanism to deal |
| 420 | * with cases where the bitmap is insufficient in and of itself. This #define |
| 421 | * indicates if the bitmap does fully represent what this ANYOF node can match. |
| 422 | * The ARG is set to this special value (since 0, 1, ... are legal, but will |
| 423 | * never reach this high). */ |
| 424 | #define ANYOF_ONLY_HAS_BITMAP ((U32) -1) |
| 425 | |
| 426 | /* When the bitmap isn't completely sufficient for handling the ANYOF node, |
| 427 | * flags (in node->flags of the ANYOF node) get set to indicate this. These |
| 428 | * are perennially in short supply. Beyond several cases where warnings need |
| 429 | * to be raised under certain circumstances, currently, there are six cases |
| 430 | * where the bitmap alone isn't sufficient. We could use six flags to |
| 431 | * represent the 6 cases, but to save flags bits, we play some games. The |
| 432 | * cases are: |
| 433 | * |
| 434 | * 1) The bitmap has a compiled-in very finite size. So something else needs |
| 435 | * to be used to specify if a code point that is too large for the bitmap |
| 436 | * actually matches. The mechanism currently is an inversion |
| 437 | * list. ANYOF_ONLY_HAS_BITMAP, described above, being TRUE indicates |
| 438 | * there are no matches of too-large code points. But if it is FALSE, |
| 439 | * then almost certainly there are matches too large for the bitmap. (The |
| 440 | * other cases, described below, either imply this one or are extremely |
| 441 | * rare in practice.) So we can just assume that a too-large code point |
| 442 | * will need something beyond the bitmap if ANYOF_ONLY_HAS_BITMAP is |
| 443 | * FALSE, instead of having a separate flag for this. |
| 444 | * 2) A subset of item 1) is if all possible code points outside the bitmap |
| 445 | * match. This is a common occurrence when the class is complemented, |
| 446 | * like /[^ij]/. Therefore a bit is reserved to indicate this, |
| 447 | * rather than having an inversion list created, |
| 448 | * ANYOF_MATCHES_ALL_ABOVE_BITMAP. |
| 449 | * 3) Under /d rules, it can happen that code points that are in the upper |
| 450 | * latin1 range (\x80-\xFF or their equivalents on EBCDIC platforms) match |
| 451 | * only if the runtime target string being matched against is UTF-8. For |
| 452 | * example /[\w[:punct:]]/d. This happens only for posix classes (with a |
| 453 | * couple of exceptions, like \d where it doesn't happen), and all such |
| 454 | * ones also have above-bitmap matches. Thus, 3) implies 1) as well. |
| 455 | * Note that /d rules are no longer encouraged; 'use 5.14' or higher |
| 456 | * deselects them. But a flag is required so that they can be properly |
| 457 | * handled. But it can be a shared flag: see 5) below. |
| 458 | * 4) Also under /d rules, something like /[\Wfoo]/ will match everything in |
| 459 | * the \x80-\xFF range, unless the string being matched against is UTF-8. |
| 460 | * An inversion list could be created for this case, but this is |
| 461 | * relatively common, and it turns out that it's all or nothing: if any |
| 462 | * one of these code points matches, they all do. Hence a single bit |
| 463 | * suffices. We use a shared flag that doesn't take up space by itself: |
| 464 | * ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER. This |
| 465 | * also implies 1), with one exception: [:^cntrl:]. |
| 466 | * 5) A user-defined \p{} property may not have been defined by the time the |
| 467 | * regex is compiled. In this case, we don't know until runtime what it |
| 468 | * will match, so we have to assume it could match anything, including |
| 469 | * code points that ordinarily would be in the bitmap. A flag bit is |
| 470 | * necessary to indicate this , though it can be shared with the item 3) |
| 471 | * flag, as that only occurs under /d, and this only occurs under non-d. |
| 472 | * This case is quite uncommon in the field, and the /(?[ ...])/ construct |
| 473 | * is a better way to accomplish what this feature does. This case also |
| 474 | * implies 1). |
| 475 | * ANYOF_SHARED_d_UPPER_LATIN1_UTF8_STRING_MATCHES_non_d_RUNTIME_USER_PROP |
| 476 | * is the shared flag. |
| 477 | * 6) /[foo]/il may have folds that are only valid if the runtime locale is a |
| 478 | * UTF-8 one. These are quite rare, so it would be good to avoid the |
| 479 | * expense of looking for them. But /l matching is slow anyway, and we've |
| 480 | * traditionally not worried too much about its performance. And this |
| 481 | * condition requires the ANYOFL_FOLD flag to be set, so testing for |
| 482 | * that flag would be sufficient to rule out most cases of this. So it is |
| 483 | * unclear if this should have a flag or not. But, this flag can be |
| 484 | * shared with another, so it doesn't occupy extra space. |
| 485 | * |
| 486 | * At the moment, there is one spare bit, but this could be increased by |
| 487 | * various tricks: |
| 488 | * |
| 489 | * If just one more bit is needed, as of this writing it seems to khw that the |
| 490 | * best choice would be to make ANYOF_MATCHES_ALL_ABOVE_BITMAP not a flag, but |
| 491 | * something like |
| 492 | * |
| 493 | * #define ANYOF_MATCHES_ALL_ABOVE_BITMAP ((U32) -2) |
| 494 | * |
| 495 | * and access it through the ARG like ANYOF_ONLY_HAS_BITMAP is. This flag is |
| 496 | * used by all ANYOF node types, and it could be used to avoid calling the |
| 497 | * handler function, as the macro REGINCLASS in regexec.c does now for other |
| 498 | * cases. |
| 499 | * |
| 500 | * Another possibility is based on the fact that ANYOF_MATCHES_POSIXL is |
| 501 | * redundant with the node type ANYOFPOSIXL. That flag could be removed, but |
| 502 | * at the expense of extra code in regexec.c. The flag has been retained |
| 503 | * because it allows us to see if we need to call reginsert, or just use the |
| 504 | * bitmap in one test. |
| 505 | * |
| 506 | * If this is done, an extension would be to make all ANYOFL nodes contain the |
| 507 | * extra 32 bits that ANYOFPOSIXL ones do. The posix flags only occupy 30 |
| 508 | * bits, so the ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD flags |
| 509 | * and ANYOFL_FOLD could be moved to that extra space, but it would mean extra |
| 510 | * instructions, as there are currently places in the code that assume those |
| 511 | * two bits are zero. |
| 512 | * |
| 513 | * All told, 5 bits could be available for other uses if all of the above were |
| 514 | * done. |
| 515 | * |
| 516 | * Some flags are not used in synthetic start class (SSC) nodes, so could be |
| 517 | * shared should new flags be needed for SSCs, like SSC_MATCHES_EMPTY_STRING |
| 518 | * now. */ |
| 519 | |
| 520 | /* If this is set, the result of the match should be complemented. regexec.c |
| 521 | * is expecting this to be in the low bit. Never in an SSC */ |
| 522 | #define ANYOF_INVERT 0x01 |
| 523 | |
| 524 | /* For the SSC node only, which cannot be inverted, so is shared with that bit. |
| 525 | * This is used only during regex compilation. */ |
| 526 | #define SSC_MATCHES_EMPTY_STRING ANYOF_INVERT |
| 527 | |
| 528 | /* Set if this is a regnode_charclass_posixl vs a regnode_charclass. This |
| 529 | * is used for runtime \d, \w, [:posix:], ..., which are used only in locale |
| 530 | * and the optimizer's synthetic start class. Non-locale \d, etc are resolved |
| 531 | * at compile-time. Only set under /l; can be in SSC */ |
| 532 | #define ANYOF_MATCHES_POSIXL 0x02 |
| 533 | |
| 534 | /* The fold is calculated and stored in the bitmap where possible at compile |
| 535 | * time. However under locale, the actual folding varies depending on |
| 536 | * what the locale is at the time of execution, so it has to be deferred until |
| 537 | * then. Only set under /l; never in an SSC */ |
| 538 | #define ANYOFL_FOLD 0x04 |
| 539 | |
| 540 | /* Shared bit set only with ANYOFL and SSC nodes: |
| 541 | * If ANYOFL_FOLD is set, this flag indicates there are potential matches |
| 542 | * valid only if the locale is a UTF-8 one. |
| 543 | * If ANYOFL_FOLD is NOT set, this flag means to warn if the runtime locale |
| 544 | * isn't a UTF-8 one (and the generated node assumes a UTF-8 locale). |
| 545 | * None of INVERT, POSIXL, |
| 546 | * ANYOF_SHARED_d_UPPER_LATIN1_UTF8_STRING_MATCHES_non_d_RUNTIME_USER_PROP |
| 547 | * can be set. */ |
| 548 | #define ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD 0x08 |
| 549 | |
| 550 | /* Convenience macros for teasing apart the meanings when reading the above bit |
| 551 | * */ |
| 552 | #define ANYOFL_SOME_FOLDS_ONLY_IN_UTF8_LOCALE(flags) \ |
| 553 | ((flags & ( ANYOFL_FOLD /* Both bits are set */ \ |
| 554 | |ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD)) \ |
| 555 | == ( ANYOFL_FOLD \ |
| 556 | |ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD)) |
| 557 | |
| 558 | #define ANYOFL_UTF8_LOCALE_REQD(flags) \ |
| 559 | ((flags & ( ANYOFL_FOLD /* Only REQD bit is set */ \ |
| 560 | |ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD)) \ |
| 561 | == ANYOFL_SHARED_UTF8_LOCALE_fold_HAS_MATCHES_nonfold_REQD) |
| 562 | |
| 563 | /* Spare: Be sure to change ANYOF_FLAGS_ALL if this gets used 0x10 */ |
| 564 | |
| 565 | /* If set, the node matches every code point NUM_ANYOF_CODE_POINTS and above. |
| 566 | * Can be in an SSC */ |
| 567 | #define ANYOF_MATCHES_ALL_ABOVE_BITMAP 0x20 |
| 568 | |
| 569 | /* Shared bit: |
| 570 | * Under /d it means the ANYOFD node matches more things if the target |
| 571 | * string is encoded in UTF-8; any such things will be non-ASCII, |
| 572 | * characters that are < 256, and can be accessed via the inversion |
| 573 | * list. |
| 574 | * When not under /d, it means the ANYOF node contains a user-defined |
| 575 | * property that wasn't yet defined at the time the regex was compiled, |
| 576 | * and so must be looked up at runtime, by creating an inversion list. |
| 577 | * (These uses are mutually exclusive because a user-defined property is |
| 578 | * specified by \p{}, and \p{} implies /u which deselects /d). The long macro |
| 579 | * name is to make sure that you are cautioned about its shared nature. Only |
| 580 | * the non-/d meaning can be in an SSC */ |
| 581 | #define ANYOF_SHARED_d_UPPER_LATIN1_UTF8_STRING_MATCHES_non_d_RUNTIME_USER_PROP 0x40 |
| 582 | |
| 583 | /* Shared bit: |
| 584 | * Under /d it means the ANYOFD node matches all non-ASCII Latin1 |
| 585 | * characters when the target string is not in utf8. |
| 586 | * When not under /d, it means the ANYOF node should raise a warning if |
| 587 | * matching against an above-Unicode code point. |
| 588 | * (These uses are mutually exclusive because the warning requires a \p{}, and |
| 589 | * \p{} implies /u which deselects /d). An SSC node only has this bit set if |
| 590 | * what is meant is the warning. The long macro name is to make sure that you |
| 591 | * are cautioned about its shared nature */ |
| 592 | #define ANYOF_SHARED_d_MATCHES_ALL_NON_UTF8_NON_ASCII_non_d_WARN_SUPER 0x80 |
| 593 | |
| 594 | #define ANYOF_FLAGS_ALL (0xff & ~0x10) |
| 595 | |
| 596 | #define ANYOF_LOCALE_FLAGS (ANYOFL_FOLD | ANYOF_MATCHES_POSIXL) |
| 597 | |
| 598 | /* These are the flags that apply to both regular ANYOF nodes and synthetic |
| 599 | * start class nodes during construction of the SSC. During finalization of |
| 600 | * the SSC, other of the flags may get added to it */ |
| 601 | #define ANYOF_COMMON_FLAGS 0 |
| 602 | |
| 603 | /* Character classes for node->classflags of ANYOF */ |
| 604 | /* Should be synchronized with a table in regprop() */ |
| 605 | /* 2n should be the normal one, paired with its complement at 2n+1 */ |
| 606 | |
| 607 | #define ANYOF_ALPHA ((_CC_ALPHA) * 2) |
| 608 | #define ANYOF_NALPHA ((ANYOF_ALPHA) + 1) |
| 609 | #define ANYOF_ALPHANUMERIC ((_CC_ALPHANUMERIC) * 2) /* [[:alnum:]] isalnum(3), utf8::IsAlnum */ |
| 610 | #define ANYOF_NALPHANUMERIC ((ANYOF_ALPHANUMERIC) + 1) |
| 611 | #define ANYOF_ASCII ((_CC_ASCII) * 2) |
| 612 | #define ANYOF_NASCII ((ANYOF_ASCII) + 1) |
| 613 | #define ANYOF_BLANK ((_CC_BLANK) * 2) /* GNU extension: space and tab: non-vertical space */ |
| 614 | #define ANYOF_NBLANK ((ANYOF_BLANK) + 1) |
| 615 | #define ANYOF_CASED ((_CC_CASED) * 2) /* Pseudo class for [:lower:] or |
| 616 | [:upper:] under /i */ |
| 617 | #define ANYOF_NCASED ((ANYOF_CASED) + 1) |
| 618 | #define ANYOF_CNTRL ((_CC_CNTRL) * 2) |
| 619 | #define ANYOF_NCNTRL ((ANYOF_CNTRL) + 1) |
| 620 | #define ANYOF_DIGIT ((_CC_DIGIT) * 2) /* \d */ |
| 621 | #define ANYOF_NDIGIT ((ANYOF_DIGIT) + 1) |
| 622 | #define ANYOF_GRAPH ((_CC_GRAPH) * 2) |
| 623 | #define ANYOF_NGRAPH ((ANYOF_GRAPH) + 1) |
| 624 | #define ANYOF_LOWER ((_CC_LOWER) * 2) |
| 625 | #define ANYOF_NLOWER ((ANYOF_LOWER) + 1) |
| 626 | #define ANYOF_PRINT ((_CC_PRINT) * 2) |
| 627 | #define ANYOF_NPRINT ((ANYOF_PRINT) + 1) |
| 628 | #define ANYOF_PUNCT ((_CC_PUNCT) * 2) |
| 629 | #define ANYOF_NPUNCT ((ANYOF_PUNCT) + 1) |
| 630 | #define ANYOF_SPACE ((_CC_SPACE) * 2) /* \s */ |
| 631 | #define ANYOF_NSPACE ((ANYOF_SPACE) + 1) |
| 632 | #define ANYOF_UPPER ((_CC_UPPER) * 2) |
| 633 | #define ANYOF_NUPPER ((ANYOF_UPPER) + 1) |
| 634 | #define ANYOF_WORDCHAR ((_CC_WORDCHAR) * 2) /* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */ |
| 635 | #define ANYOF_NWORDCHAR ((ANYOF_WORDCHAR) + 1) |
| 636 | #define ANYOF_XDIGIT ((_CC_XDIGIT) * 2) |
| 637 | #define ANYOF_NXDIGIT ((ANYOF_XDIGIT) + 1) |
| 638 | |
| 639 | /* pseudo classes below this, not stored in the class bitmap, but used as flags |
| 640 | during compilation of char classes */ |
| 641 | |
| 642 | #define ANYOF_VERTWS ((_CC_VERTSPACE) * 2) |
| 643 | #define ANYOF_NVERTWS ((ANYOF_VERTWS)+1) |
| 644 | |
| 645 | /* It is best if this is the last one, as all above it are stored as bits in a |
| 646 | * bitmap, and it isn't part of that bitmap */ |
| 647 | #if _CC_VERTSPACE != _HIGHEST_REGCOMP_DOT_H_SYNC |
| 648 | # error Problem with handy.h _HIGHEST_REGCOMP_DOT_H_SYNC #define |
| 649 | #endif |
| 650 | |
| 651 | #define ANYOF_POSIXL_MAX (ANYOF_VERTWS) /* So upper loop limit is written: |
| 652 | * '< ANYOF_MAX' |
| 653 | * Hence doesn't include VERTWS, as that |
| 654 | * is a pseudo class */ |
| 655 | #define ANYOF_MAX ANYOF_POSIXL_MAX |
| 656 | |
| 657 | #if (ANYOF_POSIXL_MAX > 32) /* Must fit in 32-bit word */ |
| 658 | # error Problem with handy.h _CC_foo #defines |
| 659 | #endif |
| 660 | |
| 661 | #define ANYOF_HORIZWS ((ANYOF_POSIXL_MAX)+2) /* = (ANYOF_NVERTWS + 1) */ |
| 662 | #define ANYOF_NHORIZWS ((ANYOF_POSIXL_MAX)+3) |
| 663 | |
| 664 | #define ANYOF_UNIPROP ((ANYOF_POSIXL_MAX)+4) /* Used to indicate a Unicode |
| 665 | property: \p{} or \P{} */ |
| 666 | |
| 667 | /* Backward source code compatibility. */ |
| 668 | |
| 669 | #define ANYOF_ALNUML ANYOF_ALNUM |
| 670 | #define ANYOF_NALNUML ANYOF_NALNUM |
| 671 | #define ANYOF_SPACEL ANYOF_SPACE |
| 672 | #define ANYOF_NSPACEL ANYOF_NSPACE |
| 673 | #define ANYOF_ALNUM ANYOF_WORDCHAR |
| 674 | #define ANYOF_NALNUM ANYOF_NWORDCHAR |
| 675 | |
| 676 | /* Utility macros for the bitmap and classes of ANYOF */ |
| 677 | |
| 678 | #define ANYOF_FLAGS(p) ((p)->flags) |
| 679 | |
| 680 | #define ANYOF_BIT(c) (1U << ((c) & 7)) |
| 681 | |
| 682 | #define POSIXL_SET(field, c) ((field) |= (1U << (c))) |
| 683 | #define ANYOF_POSIXL_SET(p, c) POSIXL_SET(((regnode_charclass_posixl*) (p))->classflags, (c)) |
| 684 | |
| 685 | #define POSIXL_CLEAR(field, c) ((field) &= ~ (1U <<(c))) |
| 686 | #define ANYOF_POSIXL_CLEAR(p, c) POSIXL_CLEAR(((regnode_charclass_posixl*) (p))->classflags, (c)) |
| 687 | |
| 688 | #define POSIXL_TEST(field, c) ((field) & (1U << (c))) |
| 689 | #define ANYOF_POSIXL_TEST(p, c) POSIXL_TEST(((regnode_charclass_posixl*) (p))->classflags, (c)) |
| 690 | |
| 691 | #define POSIXL_ZERO(field) STMT_START { (field) = 0; } STMT_END |
| 692 | #define ANYOF_POSIXL_ZERO(ret) POSIXL_ZERO(((regnode_charclass_posixl*) (ret))->classflags) |
| 693 | |
| 694 | #define ANYOF_POSIXL_SET_TO_BITMAP(p, bits) \ |
| 695 | STMT_START { \ |
| 696 | ((regnode_charclass_posixl*) (p))->classflags = (bits); \ |
| 697 | } STMT_END |
| 698 | |
| 699 | /* Shifts a bit to get, eg. 0x4000_0000, then subtracts 1 to get 0x3FFF_FFFF */ |
| 700 | #define ANYOF_POSIXL_SETALL(ret) STMT_START { ((regnode_charclass_posixl*) (ret))->classflags = nBIT_MASK(ANYOF_POSIXL_MAX); } STMT_END |
| 701 | #define ANYOF_CLASS_SETALL(ret) ANYOF_POSIXL_SETALL(ret) |
| 702 | |
| 703 | #define ANYOF_POSIXL_TEST_ANY_SET(p) \ |
| 704 | ((ANYOF_FLAGS(p) & ANYOF_MATCHES_POSIXL) \ |
| 705 | && (((regnode_charclass_posixl*)(p))->classflags)) |
| 706 | #define ANYOF_CLASS_TEST_ANY_SET(p) ANYOF_POSIXL_TEST_ANY_SET(p) |
| 707 | |
| 708 | /* Since an SSC always has this field, we don't have to test for that; nor do |
| 709 | * we want to because the bit isn't set for SSC during its construction */ |
| 710 | #define ANYOF_POSIXL_SSC_TEST_ANY_SET(p) \ |
| 711 | cBOOL(((regnode_ssc*)(p))->classflags) |
| 712 | #define ANYOF_POSIXL_SSC_TEST_ALL_SET(p) /* Are all bits set? */ \ |
| 713 | (((regnode_ssc*) (p))->classflags \ |
| 714 | == nBIT_MASK(ANYOF_POSIXL_MAX)) |
| 715 | |
| 716 | #define ANYOF_POSIXL_TEST_ALL_SET(p) \ |
| 717 | ((ANYOF_FLAGS(p) & ANYOF_MATCHES_POSIXL) \ |
| 718 | && ((regnode_charclass_posixl*) (p))->classflags \ |
| 719 | == nBIT_MASK(ANYOF_POSIXL_MAX)) |
| 720 | |
| 721 | #define ANYOF_POSIXL_OR(source, dest) STMT_START { (dest)->classflags |= (source)->classflags ; } STMT_END |
| 722 | #define ANYOF_CLASS_OR(source, dest) ANYOF_POSIXL_OR((source), (dest)) |
| 723 | |
| 724 | #define ANYOF_POSIXL_AND(source, dest) STMT_START { (dest)->classflags &= (source)->classflags ; } STMT_END |
| 725 | |
| 726 | #define ANYOF_BITMAP_ZERO(ret) Zero(((regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char) |
| 727 | #define ANYOF_BITMAP(p) ((regnode_charclass*)(p))->bitmap |
| 728 | #define ANYOF_BITMAP_BYTE(p, c) BITMAP_BYTE(ANYOF_BITMAP(p), c) |
| 729 | #define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) |= ANYOF_BIT(c)) |
| 730 | #define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c)) |
| 731 | #define ANYOF_BITMAP_TEST(p, c) cBOOL(ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c)) |
| 732 | |
| 733 | #define ANYOF_BITMAP_SETALL(p) \ |
| 734 | memset (ANYOF_BITMAP(p), 255, ANYOF_BITMAP_SIZE) |
| 735 | #define ANYOF_BITMAP_CLEARALL(p) \ |
| 736 | Zero (ANYOF_BITMAP(p), ANYOF_BITMAP_SIZE) |
| 737 | |
| 738 | /* |
| 739 | * Utility definitions. |
| 740 | */ |
| 741 | #ifndef CHARMASK |
| 742 | # define UCHARAT(p) ((int)*(const U8*)(p)) |
| 743 | #else |
| 744 | # define UCHARAT(p) ((int)*(p)&CHARMASK) |
| 745 | #endif |
| 746 | |
| 747 | /* Number of regnode equivalents that 'guy' occupies beyond the size of the |
| 748 | * smallest regnode. */ |
| 749 | #define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode)) |
| 750 | |
| 751 | #define REG_ZERO_LEN_SEEN 0x00000001 |
| 752 | #define REG_LOOKBEHIND_SEEN 0x00000002 |
| 753 | #define REG_GPOS_SEEN 0x00000004 |
| 754 | /* spare */ |
| 755 | #define REG_RECURSE_SEEN 0x00000020 |
| 756 | #define REG_TOP_LEVEL_BRANCHES_SEEN 0x00000040 |
| 757 | #define REG_VERBARG_SEEN 0x00000080 |
| 758 | #define REG_CUTGROUP_SEEN 0x00000100 |
| 759 | #define REG_RUN_ON_COMMENT_SEEN 0x00000200 |
| 760 | #define REG_UNFOLDED_MULTI_SEEN 0x00000400 |
| 761 | /* spare */ |
| 762 | #define REG_UNBOUNDED_QUANTIFIER_SEEN 0x00001000 |
| 763 | |
| 764 | |
| 765 | START_EXTERN_C |
| 766 | |
| 767 | #ifdef PLUGGABLE_RE_EXTENSION |
| 768 | #include "re_nodes.h" |
| 769 | #else |
| 770 | #include "regnodes.h" |
| 771 | #endif |
| 772 | |
| 773 | #ifndef PLUGGABLE_RE_EXTENSION |
| 774 | #ifndef DOINIT |
| 775 | EXTCONST regexp_engine PL_core_reg_engine; |
| 776 | #else /* DOINIT */ |
| 777 | EXTCONST regexp_engine PL_core_reg_engine = { |
| 778 | Perl_re_compile, |
| 779 | Perl_regexec_flags, |
| 780 | Perl_re_intuit_start, |
| 781 | Perl_re_intuit_string, |
| 782 | Perl_regfree_internal, |
| 783 | Perl_reg_numbered_buff_fetch, |
| 784 | Perl_reg_numbered_buff_store, |
| 785 | Perl_reg_numbered_buff_length, |
| 786 | Perl_reg_named_buff, |
| 787 | Perl_reg_named_buff_iter, |
| 788 | Perl_reg_qr_package, |
| 789 | #if defined(USE_ITHREADS) |
| 790 | Perl_regdupe_internal, |
| 791 | #endif |
| 792 | Perl_re_op_compile |
| 793 | }; |
| 794 | #endif /* DOINIT */ |
| 795 | #endif /* PLUGGABLE_RE_EXTENSION */ |
| 796 | |
| 797 | |
| 798 | END_EXTERN_C |
| 799 | |
| 800 | |
| 801 | /* .what is a character array with one character for each member of .data |
| 802 | * The character describes the function of the corresponding .data item: |
| 803 | * a - AV for paren_name_list under DEBUGGING |
| 804 | * f - start-class data for regstclass optimization |
| 805 | * l - start op for literal (?{EVAL}) item |
| 806 | * L - start op for literal (?{EVAL}) item, with separate CV (qr//) |
| 807 | * r - pointer to an embedded code-containing qr, e.g. /ab$qr/ |
| 808 | * s - inversion list for Unicode-style character class, and the |
| 809 | * multicharacter strings resulting from casefolding the single-character |
| 810 | * entries in the character class |
| 811 | * t - trie struct |
| 812 | * u - trie struct's widecharmap (a HV, so can't share, must dup) |
| 813 | * also used for revcharmap and words under DEBUGGING |
| 814 | * T - aho-trie struct |
| 815 | * S - sv for named capture lookup |
| 816 | * 20010712 mjd@plover.com |
| 817 | * (Remember to update re_dup() and pregfree() if you add any items.) |
| 818 | */ |
| 819 | struct reg_data { |
| 820 | U32 count; |
| 821 | U8 *what; |
| 822 | void* data[1]; |
| 823 | }; |
| 824 | |
| 825 | /* Code in S_to_utf8_substr() and S_to_byte_substr() in regexec.c accesses |
| 826 | anchored* and float* via array indexes 0 and 1. */ |
| 827 | #define anchored_substr substrs->data[0].substr |
| 828 | #define anchored_utf8 substrs->data[0].utf8_substr |
| 829 | #define anchored_offset substrs->data[0].min_offset |
| 830 | #define anchored_end_shift substrs->data[0].end_shift |
| 831 | |
| 832 | #define float_substr substrs->data[1].substr |
| 833 | #define float_utf8 substrs->data[1].utf8_substr |
| 834 | #define float_min_offset substrs->data[1].min_offset |
| 835 | #define float_max_offset substrs->data[1].max_offset |
| 836 | #define float_end_shift substrs->data[1].end_shift |
| 837 | |
| 838 | #define check_substr substrs->data[2].substr |
| 839 | #define check_utf8 substrs->data[2].utf8_substr |
| 840 | #define check_offset_min substrs->data[2].min_offset |
| 841 | #define check_offset_max substrs->data[2].max_offset |
| 842 | #define check_end_shift substrs->data[2].end_shift |
| 843 | |
| 844 | #define RX_ANCHORED_SUBSTR(rx) (ReANY(rx)->anchored_substr) |
| 845 | #define RX_ANCHORED_UTF8(rx) (ReANY(rx)->anchored_utf8) |
| 846 | #define RX_FLOAT_SUBSTR(rx) (ReANY(rx)->float_substr) |
| 847 | #define RX_FLOAT_UTF8(rx) (ReANY(rx)->float_utf8) |
| 848 | |
| 849 | /* trie related stuff */ |
| 850 | |
| 851 | /* a transition record for the state machine. the |
| 852 | check field determines which state "owns" the |
| 853 | transition. the char the transition is for is |
| 854 | determined by offset from the owning states base |
| 855 | field. the next field determines which state |
| 856 | is to be transitioned to if any. |
| 857 | */ |
| 858 | struct _reg_trie_trans { |
| 859 | U32 next; |
| 860 | U32 check; |
| 861 | }; |
| 862 | |
| 863 | /* a transition list element for the list based representation */ |
| 864 | struct _reg_trie_trans_list_elem { |
| 865 | U16 forid; |
| 866 | U32 newstate; |
| 867 | }; |
| 868 | typedef struct _reg_trie_trans_list_elem reg_trie_trans_le; |
| 869 | |
| 870 | /* a state for compressed nodes. base is an offset |
| 871 | into an array of reg_trie_trans array. If wordnum is |
| 872 | nonzero the state is accepting. if base is zero then |
| 873 | the state has no children (and will be accepting) |
| 874 | */ |
| 875 | struct _reg_trie_state { |
| 876 | U16 wordnum; |
| 877 | union { |
| 878 | U32 base; |
| 879 | reg_trie_trans_le* list; |
| 880 | } trans; |
| 881 | }; |
| 882 | |
| 883 | /* info per word; indexed by wordnum */ |
| 884 | typedef struct { |
| 885 | U16 prev; /* previous word in acceptance chain; eg in |
| 886 | * zzz|abc|ab/ after matching the chars abc, the |
| 887 | * accepted word is #2, and the previous accepted |
| 888 | * word is #3 */ |
| 889 | U32 len; /* how many chars long is this word? */ |
| 890 | U32 accept; /* accept state for this word */ |
| 891 | } reg_trie_wordinfo; |
| 892 | |
| 893 | |
| 894 | typedef struct _reg_trie_state reg_trie_state; |
| 895 | typedef struct _reg_trie_trans reg_trie_trans; |
| 896 | |
| 897 | |
| 898 | /* anything in here that needs to be freed later |
| 899 | should be dealt with in pregfree. |
| 900 | refcount is first in both this and _reg_ac_data to allow a space |
| 901 | optimisation in Perl_regdupe. */ |
| 902 | struct _reg_trie_data { |
| 903 | U32 refcount; /* number of times this trie is referenced */ |
| 904 | U32 lasttrans; /* last valid transition element */ |
| 905 | U16 *charmap; /* byte to charid lookup array */ |
| 906 | reg_trie_state *states; /* state data */ |
| 907 | reg_trie_trans *trans; /* array of transition elements */ |
| 908 | char *bitmap; /* stclass bitmap */ |
| 909 | U16 *jump; /* optional 1 indexed array of offsets before tail |
| 910 | for the node following a given word. */ |
| 911 | reg_trie_wordinfo *wordinfo; /* array of info per word */ |
| 912 | U16 uniquecharcount; /* unique chars in trie (width of trans table) */ |
| 913 | U32 startstate; /* initial state - used for common prefix optimisation */ |
| 914 | STRLEN minlen; /* minimum length of words in trie - build/opt only? */ |
| 915 | STRLEN maxlen; /* maximum length of words in trie - build/opt only? */ |
| 916 | U32 prefixlen; /* #chars in common prefix */ |
| 917 | U32 statecount; /* Build only - number of states in the states array |
| 918 | (including the unused zero state) */ |
| 919 | U32 wordcount; /* Build only */ |
| 920 | #ifdef DEBUGGING |
| 921 | STRLEN charcount; /* Build only */ |
| 922 | #endif |
| 923 | }; |
| 924 | /* There is one (3 under DEBUGGING) pointers that logically belong in this |
| 925 | structure, but are held outside as they need duplication on thread cloning, |
| 926 | whereas the rest of the structure can be read only: |
| 927 | HV *widecharmap; code points > 255 to charid |
| 928 | #ifdef DEBUGGING |
| 929 | AV *words; Array of words contained in trie, for dumping |
| 930 | AV *revcharmap; Map of each charid back to its character representation |
| 931 | #endif |
| 932 | */ |
| 933 | |
| 934 | #define TRIE_WORDS_OFFSET 2 |
| 935 | |
| 936 | typedef struct _reg_trie_data reg_trie_data; |
| 937 | |
| 938 | /* refcount is first in both this and _reg_trie_data to allow a space |
| 939 | optimisation in Perl_regdupe. */ |
| 940 | struct _reg_ac_data { |
| 941 | U32 refcount; |
| 942 | U32 trie; |
| 943 | U32 *fail; |
| 944 | reg_trie_state *states; |
| 945 | }; |
| 946 | typedef struct _reg_ac_data reg_ac_data; |
| 947 | |
| 948 | /* ANY_BIT doesn't use the structure, so we can borrow it here. |
| 949 | This is simpler than refactoring all of it as wed end up with |
| 950 | three different sets... */ |
| 951 | |
| 952 | #define TRIE_BITMAP(p) (((reg_trie_data *)(p))->bitmap) |
| 953 | #define TRIE_BITMAP_BYTE(p, c) BITMAP_BYTE(TRIE_BITMAP(p), c) |
| 954 | #define TRIE_BITMAP_SET(p, c) (TRIE_BITMAP_BYTE(p, c) |= ANYOF_BIT((U8)c)) |
| 955 | #define TRIE_BITMAP_CLEAR(p,c) (TRIE_BITMAP_BYTE(p, c) &= ~ANYOF_BIT((U8)c)) |
| 956 | #define TRIE_BITMAP_TEST(p, c) (TRIE_BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c)) |
| 957 | |
| 958 | #define IS_ANYOF_TRIE(op) ((op)==TRIEC || (op)==AHOCORASICKC) |
| 959 | #define IS_TRIE_AC(op) ((op)>=AHOCORASICK) |
| 960 | |
| 961 | |
| 962 | #define BITMAP_BYTE(p, c) (( (U8*) p) [ ( ( (UV) (c)) >> 3) ] ) |
| 963 | #define BITMAP_TEST(p, c) (BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c)) |
| 964 | |
| 965 | /* these defines assume uniquecharcount is the correct variable, and state may be evaluated twice */ |
| 966 | #define TRIE_NODENUM(state) (((state)-1)/(trie->uniquecharcount)+1) |
| 967 | #define SAFE_TRIE_NODENUM(state) ((state) ? (((state)-1)/(trie->uniquecharcount)+1) : (state)) |
| 968 | #define TRIE_NODEIDX(state) ((state) ? (((state)-1)*(trie->uniquecharcount)+1) : (state)) |
| 969 | |
| 970 | #ifdef DEBUGGING |
| 971 | #define TRIE_CHARCOUNT(trie) ((trie)->charcount) |
| 972 | #else |
| 973 | #define TRIE_CHARCOUNT(trie) (trie_charcount) |
| 974 | #endif |
| 975 | |
| 976 | #define RE_TRIE_MAXBUF_INIT 65536 |
| 977 | #define RE_TRIE_MAXBUF_NAME "\022E_TRIE_MAXBUF" |
| 978 | #define RE_DEBUG_FLAGS "\022E_DEBUG_FLAGS" |
| 979 | |
| 980 | #define RE_COMPILE_RECURSION_INIT 1000 |
| 981 | #define RE_COMPILE_RECURSION_LIMIT "\022E_COMPILE_RECURSION_LIMIT" |
| 982 | |
| 983 | /* |
| 984 | |
| 985 | RE_DEBUG_FLAGS is used to control what debug output is emitted |
| 986 | its divided into three groups of options, some of which interact. |
| 987 | The three groups are: Compile, Execute, Extra. There is room for a |
| 988 | further group, as currently only the low three bytes are used. |
| 989 | |
| 990 | Compile Options: |
| 991 | |
| 992 | PARSE |
| 993 | PEEP |
| 994 | TRIE |
| 995 | PROGRAM |
| 996 | OFFSETS |
| 997 | |
| 998 | Execute Options: |
| 999 | |
| 1000 | INTUIT |
| 1001 | MATCH |
| 1002 | TRIE |
| 1003 | |
| 1004 | Extra Options |
| 1005 | |
| 1006 | TRIE |
| 1007 | OFFSETS |
| 1008 | |
| 1009 | If you modify any of these make sure you make corresponding changes to |
| 1010 | re.pm, especially to the documentation. |
| 1011 | |
| 1012 | */ |
| 1013 | |
| 1014 | |
| 1015 | /* Compile */ |
| 1016 | #define RE_DEBUG_COMPILE_MASK 0x0000FF |
| 1017 | #define RE_DEBUG_COMPILE_PARSE 0x000001 |
| 1018 | #define RE_DEBUG_COMPILE_OPTIMISE 0x000002 |
| 1019 | #define RE_DEBUG_COMPILE_TRIE 0x000004 |
| 1020 | #define RE_DEBUG_COMPILE_DUMP 0x000008 |
| 1021 | #define RE_DEBUG_COMPILE_FLAGS 0x000010 |
| 1022 | #define RE_DEBUG_COMPILE_TEST 0x000020 |
| 1023 | |
| 1024 | /* Execute */ |
| 1025 | #define RE_DEBUG_EXECUTE_MASK 0x00FF00 |
| 1026 | #define RE_DEBUG_EXECUTE_INTUIT 0x000100 |
| 1027 | #define RE_DEBUG_EXECUTE_MATCH 0x000200 |
| 1028 | #define RE_DEBUG_EXECUTE_TRIE 0x000400 |
| 1029 | |
| 1030 | /* Extra */ |
| 1031 | #define RE_DEBUG_EXTRA_MASK 0x3FF0000 |
| 1032 | #define RE_DEBUG_EXTRA_TRIE 0x0010000 |
| 1033 | #define RE_DEBUG_EXTRA_OFFSETS 0x0020000 |
| 1034 | #define RE_DEBUG_EXTRA_OFFDEBUG 0x0040000 |
| 1035 | #define RE_DEBUG_EXTRA_STATE 0x0080000 |
| 1036 | #define RE_DEBUG_EXTRA_OPTIMISE 0x0100000 |
| 1037 | #define RE_DEBUG_EXTRA_BUFFERS 0x0400000 |
| 1038 | #define RE_DEBUG_EXTRA_GPOS 0x0800000 |
| 1039 | #define RE_DEBUG_EXTRA_DUMP_PRE_OPTIMIZE 0x1000000 |
| 1040 | #define RE_DEBUG_EXTRA_WILDCARD 0x2000000 |
| 1041 | /* combined */ |
| 1042 | #define RE_DEBUG_EXTRA_STACK 0x0280000 |
| 1043 | |
| 1044 | #define RE_DEBUG_FLAG(x) (re_debug_flags & (x)) |
| 1045 | /* Compile */ |
| 1046 | #define DEBUG_COMPILE_r(x) DEBUG_r( \ |
| 1047 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_MASK)) x ) |
| 1048 | #define DEBUG_PARSE_r(x) DEBUG_r( \ |
| 1049 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_PARSE)) x ) |
| 1050 | #define DEBUG_OPTIMISE_r(x) DEBUG_r( \ |
| 1051 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) x ) |
| 1052 | #define DEBUG_DUMP_r(x) DEBUG_r( \ |
| 1053 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_DUMP)) x ) |
| 1054 | #define DEBUG_TRIE_COMPILE_r(x) DEBUG_r( \ |
| 1055 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_TRIE)) x ) |
| 1056 | #define DEBUG_FLAGS_r(x) DEBUG_r( \ |
| 1057 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_FLAGS)) x ) |
| 1058 | #define DEBUG_TEST_r(x) DEBUG_r( \ |
| 1059 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_TEST)) x ) |
| 1060 | /* Execute */ |
| 1061 | #define DEBUG_EXECUTE_r(x) DEBUG_r( \ |
| 1062 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXECUTE_MASK)) x ) |
| 1063 | #define DEBUG_INTUIT_r(x) DEBUG_r( \ |
| 1064 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXECUTE_INTUIT)) x ) |
| 1065 | #define DEBUG_MATCH_r(x) DEBUG_r( \ |
| 1066 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXECUTE_MATCH)) x ) |
| 1067 | #define DEBUG_TRIE_EXECUTE_r(x) DEBUG_r( \ |
| 1068 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXECUTE_TRIE)) x ) |
| 1069 | |
| 1070 | /* Extra */ |
| 1071 | #define DEBUG_EXTRA_r(x) DEBUG_r( \ |
| 1072 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_MASK)) x ) |
| 1073 | #define DEBUG_OFFSETS_r(x) DEBUG_r( \ |
| 1074 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_OFFSETS)) x ) |
| 1075 | #define DEBUG_STATE_r(x) DEBUG_r( \ |
| 1076 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_STATE)) x ) |
| 1077 | #define DEBUG_STACK_r(x) DEBUG_r( \ |
| 1078 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_STACK)) x ) |
| 1079 | #define DEBUG_BUFFERS_r(x) DEBUG_r( \ |
| 1080 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_BUFFERS)) x ) |
| 1081 | |
| 1082 | #define DEBUG_OPTIMISE_MORE_r(x) DEBUG_r( \ |
| 1083 | if (DEBUG_v_TEST || ((RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE) == \ |
| 1084 | RE_DEBUG_FLAG(RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE))) x ) |
| 1085 | #define MJD_OFFSET_DEBUG(x) DEBUG_r( \ |
| 1086 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_OFFDEBUG)) \ |
| 1087 | Perl_warn_nocontext x ) |
| 1088 | #define DEBUG_TRIE_COMPILE_MORE_r(x) DEBUG_TRIE_COMPILE_r( \ |
| 1089 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_TRIE)) x ) |
| 1090 | #define DEBUG_TRIE_EXECUTE_MORE_r(x) DEBUG_TRIE_EXECUTE_r( \ |
| 1091 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_TRIE)) x ) |
| 1092 | |
| 1093 | #define DEBUG_TRIE_r(x) DEBUG_r( \ |
| 1094 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_COMPILE_TRIE \ |
| 1095 | | RE_DEBUG_EXECUTE_TRIE )) x ) |
| 1096 | #define DEBUG_GPOS_r(x) DEBUG_r( \ |
| 1097 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_GPOS)) x ) |
| 1098 | |
| 1099 | #define DEBUG_DUMP_PRE_OPTIMIZE_r(x) DEBUG_r( \ |
| 1100 | if (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_DUMP_PRE_OPTIMIZE)) x ) |
| 1101 | |
| 1102 | /* initialization */ |
| 1103 | /* Get the debug flags for code not in regcomp.c nor regexec.c. This doesn't |
| 1104 | * initialize the variable if it isn't already there, instead it just assumes |
| 1105 | * the flags are 0 */ |
| 1106 | #define DECLARE_AND_GET_RE_DEBUG_FLAGS_NON_REGEX \ |
| 1107 | volatile IV re_debug_flags = 0; PERL_UNUSED_VAR(re_debug_flags); \ |
| 1108 | STMT_START { \ |
| 1109 | SV * re_debug_flags_sv = NULL; \ |
| 1110 | /* get_sv() can return NULL during global destruction. */ \ |
| 1111 | re_debug_flags_sv = PL_curcop ? get_sv(RE_DEBUG_FLAGS, GV_ADD) : NULL; \ |
| 1112 | if (re_debug_flags_sv && SvIOK(re_debug_flags_sv)) \ |
| 1113 | re_debug_flags=SvIV(re_debug_flags_sv); \ |
| 1114 | } STMT_END |
| 1115 | |
| 1116 | |
| 1117 | #ifdef DEBUGGING |
| 1118 | |
| 1119 | /* For use in regcomp.c and regexec.c, Get the debug flags, and initialize to |
| 1120 | * the defaults if not done already */ |
| 1121 | #define DECLARE_AND_GET_RE_DEBUG_FLAGS \ |
| 1122 | volatile IV re_debug_flags = 0; PERL_UNUSED_VAR(re_debug_flags); \ |
| 1123 | STMT_START { \ |
| 1124 | SV * re_debug_flags_sv = NULL; \ |
| 1125 | /* get_sv() can return NULL during global destruction. */ \ |
| 1126 | re_debug_flags_sv = PL_curcop ? get_sv(RE_DEBUG_FLAGS, GV_ADD) : NULL; \ |
| 1127 | if (re_debug_flags_sv) { \ |
| 1128 | if (!SvIOK(re_debug_flags_sv)) /* If doesnt exist set to default */\ |
| 1129 | sv_setuv(re_debug_flags_sv, \ |
| 1130 | /* These defaults should be kept in sync with re.pm */ \ |
| 1131 | RE_DEBUG_COMPILE_DUMP | RE_DEBUG_EXECUTE_MASK ); \ |
| 1132 | re_debug_flags=SvIV(re_debug_flags_sv); \ |
| 1133 | } \ |
| 1134 | } STMT_END |
| 1135 | |
| 1136 | #define isDEBUG_WILDCARD (DEBUG_v_TEST || RE_DEBUG_FLAG(RE_DEBUG_EXTRA_WILDCARD)) |
| 1137 | |
| 1138 | #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2) \ |
| 1139 | const char * const rpv = \ |
| 1140 | pv_pretty((dsv), (pv), (l), (m), \ |
| 1141 | PL_colors[(c1)],PL_colors[(c2)], \ |
| 1142 | PERL_PV_ESCAPE_RE|PERL_PV_ESCAPE_NONASCII |((isuni) ? PERL_PV_ESCAPE_UNI : 0) ); \ |
| 1143 | const int rlen = SvCUR(dsv) |
| 1144 | |
| 1145 | /* This is currently unsed in the core */ |
| 1146 | #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m) \ |
| 1147 | const char * const rpv = \ |
| 1148 | pv_pretty((dsv), (SvPV_nolen_const(sv)), (SvCUR(sv)), (m), \ |
| 1149 | PL_colors[(c1)],PL_colors[(c2)], \ |
| 1150 | PERL_PV_ESCAPE_RE|PERL_PV_ESCAPE_NONASCII |((isuni) ? PERL_PV_ESCAPE_UNI : 0) ) |
| 1151 | |
| 1152 | #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m) \ |
| 1153 | const char * const rpv = \ |
| 1154 | pv_pretty((dsv), (pv), (l), (m), \ |
| 1155 | PL_colors[0], PL_colors[1], \ |
| 1156 | ( PERL_PV_PRETTY_QUOTE | PERL_PV_ESCAPE_RE | PERL_PV_ESCAPE_NONASCII | PERL_PV_PRETTY_ELLIPSES | \ |
| 1157 | ((isuni) ? PERL_PV_ESCAPE_UNI : 0)) \ |
| 1158 | ) |
| 1159 | |
| 1160 | #define RE_SV_DUMPLEN(ItEm) (SvCUR(ItEm) - (SvTAIL(ItEm)!=0)) |
| 1161 | #define RE_SV_TAIL(ItEm) (SvTAIL(ItEm) ? "$" : "") |
| 1162 | |
| 1163 | #else /* if not DEBUGGING */ |
| 1164 | |
| 1165 | #define DECLARE_AND_GET_RE_DEBUG_FLAGS dNOOP |
| 1166 | #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2) dNOOP |
| 1167 | #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m) |
| 1168 | #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m) dNOOP |
| 1169 | #define RE_SV_DUMPLEN(ItEm) |
| 1170 | #define RE_SV_TAIL(ItEm) |
| 1171 | #define isDEBUG_WILDCARD 0 |
| 1172 | |
| 1173 | #endif /* DEBUG RELATED DEFINES */ |
| 1174 | |
| 1175 | #define FIRST_NON_ASCII_DECIMAL_DIGIT 0x660 /* ARABIC_INDIC_DIGIT_ZERO */ |
| 1176 | |
| 1177 | typedef enum { |
| 1178 | TRADITIONAL_BOUND = _CC_WORDCHAR, |
| 1179 | GCB_BOUND, |
| 1180 | LB_BOUND, |
| 1181 | SB_BOUND, |
| 1182 | WB_BOUND |
| 1183 | } bound_type; |
| 1184 | |
| 1185 | /* This unpacks the FLAGS field of ANYOF[HR]x nodes. The value it contains |
| 1186 | * gives the strict lower bound for the UTF-8 start byte of any code point |
| 1187 | * matchable by the node, and a loose upper bound as well. |
| 1188 | * |
| 1189 | * The low bound is stored in the upper 6 bits, plus 0xC0. |
| 1190 | * The loose upper bound is determined from the lowest 2 bits and the low bound |
| 1191 | * (called x) as follows: |
| 1192 | * |
| 1193 | * 11 The upper limit of the range can be as much as (EF - x) / 8 |
| 1194 | * 10 The upper limit of the range can be as much as (EF - x) / 4 |
| 1195 | * 01 The upper limit of the range can be as much as (EF - x) / 2 |
| 1196 | * 00 The upper limit of the range can be as much as EF |
| 1197 | * |
| 1198 | * For motivation of this design, see commit message in |
| 1199 | * 3146c00a633e9cbed741e10146662fbcedfdb8d3 */ |
| 1200 | #ifdef EBCDIC |
| 1201 | # define MAX_ANYOF_HRx_BYTE 0xF4 |
| 1202 | #else |
| 1203 | # define MAX_ANYOF_HRx_BYTE 0xEF |
| 1204 | #endif |
| 1205 | #define LOWEST_ANYOF_HRx_BYTE(b) (((b) >> 2) + 0xC0) |
| 1206 | #define HIGHEST_ANYOF_HRx_BYTE(b) \ |
| 1207 | (LOWEST_ANYOF_HRx_BYTE(b) \ |
| 1208 | + ((MAX_ANYOF_HRx_BYTE - LOWEST_ANYOF_HRx_BYTE(b)) >> ((b) & 3))) |
| 1209 | |
| 1210 | #endif /* PERL_REGCOMP_H_ */ |
| 1211 | |
| 1212 | /* |
| 1213 | * ex: set ts=8 sts=4 sw=4 et: |
| 1214 | */ |