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Allow regexp-to-pvlv assignment
[perl5.git] / regcomp.h
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a0d0e21e 1/* regcomp.h
d6376244 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
663f364b 4 * 2000, 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others
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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 *
a687059c 9 */
e1d1eefb 10#include "regcharclass.h"
a687059c 11
58e23c8d 12/* Convert branch sequences to more efficient trie ops? */
07be1b83 13#define PERL_ENABLE_TRIE_OPTIMISATION 1
58e23c8d 14
486ec47a 15/* Be really aggressive about optimising patterns with trie sequences? */
07be1b83 16#define PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION 1
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17
18/* Should the optimiser take positive assertions into account? */
68ba3a3f 19#define PERL_ENABLE_POSITIVE_ASSERTION_STUDY 0
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20
21/* Not for production use: */
07be1b83 22#define PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS 0
58e23c8d 23
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24/* Activate offsets code - set to if 1 to enable */
25#ifdef DEBUGGING
26#define RE_TRACK_PATTERN_OFFSETS
27#endif
28
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29/* Unless the next line is uncommented it is illegal to combine lazy
30 matching with possessive matching. Frankly it doesn't make much sense
31 to allow it as X*?+ matches nothing, X+?+ matches a single char only,
32 and X{min,max}?+ matches min times only.
33 */
34/* #define REG_ALLOW_MINMOD_SUSPEND */
07be1b83 35
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36/*
37 * The "internal use only" fields in regexp.h are present to pass info from
38 * compile to execute that permits the execute phase to run lots faster on
39 * simple cases. They are:
40 *
bd61b366 41 * regstart sv that must begin a match; NULL if none obvious
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42 * reganch is the match anchored (at beginning-of-line only)?
43 * regmust string (pointer into program) that match must include, or NULL
79072805 44 * [regmust changed to SV* for bminstr()--law]
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45 * regmlen length of regmust string
46 * [regmlen not used currently]
47 *
48 * Regstart and reganch permit very fast decisions on suitable starting points
49 * for a match, cutting down the work a lot. Regmust permits fast rejection
50 * of lines that cannot possibly match. The regmust tests are costly enough
e50aee73 51 * that pregcomp() supplies a regmust only if the r.e. contains something
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52 * potentially expensive (at present, the only such thing detected is * or +
53 * at the start of the r.e., which can involve a lot of backup). Regmlen is
e50aee73 54 * supplied because the test in pregexec() needs it and pregcomp() is computing
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55 * it anyway.
56 * [regmust is now supplied always. The tests that use regmust have a
57 * heuristic that disables the test if it usually matches.]
58 *
59 * [In fact, we now use regmust in many cases to locate where the search
60 * starts in the string, so if regback is >= 0, the regmust search is never
61 * wasted effort. The regback variable says how many characters back from
62 * where regmust matched is the earliest possible start of the match.
63 * For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
64 */
65
66/*
67 * Structure for regexp "program". This is essentially a linear encoding
68 * of a nondeterministic finite-state machine (aka syntax charts or
69 * "railroad normal form" in parsing technology). Each node is an opcode
70 * plus a "next" pointer, possibly plus an operand. "Next" pointers of
71 * all nodes except BRANCH implement concatenation; a "next" pointer with
72 * a BRANCH on both ends of it is connecting two alternatives. (Here we
73 * have one of the subtle syntax dependencies: an individual BRANCH (as
74 * opposed to a collection of them) is never concatenated with anything
75 * because of operator precedence.) The operand of some types of node is
76 * a literal string; for others, it is a node leading into a sub-FSM. In
77 * particular, the operand of a BRANCH node is the first node of the branch.
78 * (NB this is *not* a tree structure: the tail of the branch connects
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79 * to the thing following the set of BRANCHes.) The opcodes are defined
80 * in regnodes.h which is generated from regcomp.sym by regcomp.pl.
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81 */
82
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83/*
84 * A node is one char of opcode followed by two chars of "next" pointer.
85 * "Next" pointers are stored as two 8-bit pieces, high order first. The
86 * value is a positive offset from the opcode of the node containing it.
87 * An operand, if any, simply follows the node. (Note that much of the
88 * code generation knows about this implicit relationship.)
89 *
90 * Using two bytes for the "next" pointer is vast overkill for most things,
91 * but allows patterns to get big without disasters.
92 *
e91177ed 93 * [The "next" pointer is always aligned on an even
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94 * boundary, and reads the offset directly as a short. Also, there is no
95 * special test to reverse the sign of BACK pointers since the offset is
96 * stored negative.]
97 */
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98
99/* This is the stuff that used to live in regexp.h that was truly
100 private to the engine itself. It now lives here. */
101
28d8d7f4 102
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103
104 typedef struct regexp_internal {
1f1031fe 105 int name_list_idx; /* Optional data index of an array of paren names */
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106 union {
107 U32 *offsets; /* offset annotations 20001228 MJD
108 data about mapping the program to the
109 string -
110 offsets[0] is proglen when this is used
111 */
112 U32 proglen;
113 } u;
114
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115 regnode *regstclass; /* Optional startclass as identified or constructed
116 by the optimiser */
117 struct reg_data *data; /* Additional miscellaneous data used by the program.
118 Used to make it easier to clone and free arbitrary
119 data that the regops need. Often the ARG field of
120 a regop is an index into this structure */
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121 struct reg_code_block *code_blocks;/* positions of literal (?{}) */
122 int num_code_blocks; /* size of code_blocks[] */
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123 regnode program[1]; /* Unwarranted chumminess with compiler. */
124} regexp_internal;
125
126#define RXi_SET(x,y) (x)->pprivate = (void*)(y)
127#define RXi_GET(x) ((regexp_internal *)((x)->pprivate))
128#define RXi_GET_DECL(r,ri) regexp_internal *ri = RXi_GET(r)
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129/*
130 * Flags stored in regexp->intflags
131 * These are used only internally to the regexp engine
132 *
133 * See regexp.h for flags used externally to the regexp engine
134 */
135#define PREGf_SKIP 0x00000001
136#define PREGf_IMPLICIT 0x00000002 /* Converted .* to ^.* */
137#define PREGf_NAUGHTY 0x00000004 /* how exponential is this pattern? */
138#define PREGf_VERBARG_SEEN 0x00000008
139#define PREGf_CUTGROUP_SEEN 0x00000010
732caac7 140#define PREGf_USE_RE_EVAL 0x00000020 /* compiled with "use re 'eval'" */
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141
142
143/* this is where the old regcomp.h started */
a687059c 144
c277df42 145struct regnode_string {
cd439c50 146 U8 str_len;
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147 U8 type;
148 U16 next_off;
cd439c50 149 char string[1];
c277df42 150};
a687059c 151
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152/* Argument bearing node - workhorse,
153 arg1 is often for the data field */
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154struct regnode_1 {
155 U8 flags;
156 U8 type;
157 U16 next_off;
158 U32 arg1;
159};
160
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161/* Similar to a regnode_1 but with an extra signed argument */
162struct regnode_2L {
163 U8 flags;
164 U8 type;
165 U16 next_off;
166 U32 arg1;
167 I32 arg2;
168};
169
170/* 'Two field' -- Two 16 bit unsigned args */
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171struct regnode_2 {
172 U8 flags;
173 U8 type;
174 U16 next_off;
175 U16 arg1;
176 U16 arg2;
177};
178
6bda09f9 179
936ed897 180#define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
d1eb3177 181#define ANYOF_CLASSBITMAP_SIZE 4 /* up to 32 (8*4) named classes */
936ed897 182
786e8c11 183/* also used by trie */
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184struct regnode_charclass {
185 U8 flags;
186 U8 type;
187 U16 next_off;
bf3f2d85 188 U32 arg1; /* used as ptr in S_regclass */
19103b91 189 char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */
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190};
191
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192/* has runtime (locale) \d, \w, ..., [:posix:] classes */
193struct regnode_charclass_class {
194 U8 flags; /* ANYOF_CLASS bit must go here */
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195 U8 type;
196 U16 next_off;
bf3f2d85 197 U32 arg1; /* used as ptr in S_regclass */
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198 char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
199 char classflags[ANYOF_CLASSBITMAP_SIZE]; /* and run-time */
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200};
201
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202/* XXX fix this description.
203 Impose a limit of REG_INFTY on various pattern matching operations
204 to limit stack growth and to avoid "infinite" recursions.
205*/
206/* The default size for REG_INFTY is I16_MAX, which is the same as
207 SHORT_MAX (see perl.h). Unfortunately I16 isn't necessarily 16 bits
208 (see handy.h). On the Cray C90, sizeof(short)==4 and hence I16_MAX is
209 ((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
210 ((1<<63)-1). To limit stack growth to reasonable sizes, supply a
211 smaller default.
212 --Andy Dougherty 11 June 1998
213*/
214#if SHORTSIZE > 2
215# ifndef REG_INFTY
216# define REG_INFTY ((1<<15)-1)
217# endif
218#endif
219
220#ifndef REG_INFTY
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221# define REG_INFTY I16_MAX
222#endif
a687059c 223
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224#define ARG_VALUE(arg) (arg)
225#define ARG__SET(arg,val) ((arg) = (val))
c277df42 226
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227#undef ARG
228#undef ARG1
229#undef ARG2
230
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231#define ARG(p) ARG_VALUE(ARG_LOC(p))
232#define ARG1(p) ARG_VALUE(ARG1_LOC(p))
233#define ARG2(p) ARG_VALUE(ARG2_LOC(p))
6bda09f9 234#define ARG2L(p) ARG_VALUE(ARG2L_LOC(p))
786e8c11 235
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236#define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
237#define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
238#define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
6bda09f9 239#define ARG2L_SET(p, val) ARG__SET(ARG2L_LOC(p), (val))
c277df42 240
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241#undef NEXT_OFF
242#undef NODE_ALIGN
243
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244#define NEXT_OFF(p) ((p)->next_off)
245#define NODE_ALIGN(node)
246#define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
a687059c 247
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248#define SIZE_ALIGN NODE_ALIGN
249
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250#undef OP
251#undef OPERAND
252#undef MASK
253#undef STRING
254
e91177ed 255#define OP(p) ((p)->type)
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256#define FLAGS(p) ((p)->flags) /* Caution: Doesn't apply to all \
257 regnode types. For some, it's the \
258 character set of the regnode */
e91177ed 259#define OPERAND(p) (((struct regnode_string *)p)->string)
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260#define MASK(p) ((char*)OPERAND(p))
261#define STR_LEN(p) (((struct regnode_string *)p)->str_len)
262#define STRING(p) (((struct regnode_string *)p)->string)
263#define STR_SZ(l) ((l + sizeof(regnode) - 1) / sizeof(regnode))
264#define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p))+1)
265
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266#undef NODE_ALIGN
267#undef ARG_LOC
268#undef NEXTOPER
269#undef PREVOPER
270
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271#define NODE_ALIGN(node)
272#define ARG_LOC(p) (((struct regnode_1 *)p)->arg1)
273#define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1)
274#define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2)
6bda09f9 275#define ARG2L_LOC(p) (((struct regnode_2L *)p)->arg2)
786e8c11 276
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277#define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */
278#define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2)
279
280#define NODE_STEP_B 4
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281
282#define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
283#define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
284
e91177ed 285#define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
c277df42 286 (ptr)->type = op; (ptr)->next_off = 0; (ptr)++; } STMT_END
e91177ed 287#define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
c277df42 288 ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
a687059c 289
22c35a8c 290#define REG_MAGIC 0234
a687059c 291
830247a4 292#define SIZE_ONLY (RExC_emit == &PL_regdummy)
c277df42 293
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294/* If the bitmap doesn't fully represent what this ANYOF node can match, the
295 * ARG is set to this special value (since 0, 1, ... are legal, but will never
296 * reach this high). */
297#define ANYOF_NONBITMAP_EMPTY ((U32) -1)
298
299/* The information used to be stored as as combination of the ANYOF_UTF8 and
300 * ANYOF_NONBITMAP_NON_UTF8 bits in the flags field, but was moved out of there
301 * to free up a bit for other uses. This tries to hide the change from
302 * existing code as much as possible. Now, the data structure that goes in ARG
303 * is not allocated unless it is needed, and that is what is used to determine
304 * if there is something outside the bitmap. The code now assumes that if
305 * that structure exists, that any UTF-8 encoded string should be tried against
306 * it, but a non-UTF8-encoded string will be tried only if the
307 * ANYOF_NONBITMAP_NON_UTF8 bit is also set. */
308#define ANYOF_NONBITMAP(node) (ARG(node) != ANYOF_NONBITMAP_EMPTY)
309
d5788240 310/* Flags for node->flags of ANYOF. These are in short supply, so some games
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311 * are done to share them, as described below. Already, the ANYOF_LOCALE and
312 * ANYOF_CLASS bits are shared, making a space penalty for all locale nodes.
313 * An option would be to push them into new nodes. E.g. there could be an
314 * ANYOF_LOCALE node that would be in place of the flag of the same name. But
315 * there are better options. The UNICODE_ALL bit could be freed up by
316 * resorting to creating a swash containing everything above 255. This
317 * introduces a performance penalty. Better would be to split it off into a
318 * separate node, which actually would improve performance by allowing adding a
319 * case statement to regexec.c use the bit map for code points under 256, and
320 * to match everything above. If flags need to be added that are applicable to
321 * the synthetic start class only, with some work, they could be put in the
322 * next-node field, or in an unused bit of the classflags field. This could be
323 * done with the current EOS flag, and a new node type created that is just for
324 * the scc, freeing up that bit */
b8c5462f 325
a4e790c1 326#define ANYOF_LOCALE 0x01 /* /l modifier */
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327
328/* The fold is calculated and stored in the bitmap where possible at compile
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329 * time. However under locale, the actual folding varies depending on
330 * what the locale is at the time of execution, so it has to be deferred until
331 * then */
332#define ANYOF_LOC_FOLD 0x02
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333
334#define ANYOF_INVERT 0x04
1984f6a0 335
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336/* Set if this is a struct regnode_charclass_class vs a regnode_charclass. This
337 * is used for runtime \d, \w, [:posix:], ..., which are used only in locale
338 * and the optimizer's synthetic start class. Non-locale \d, etc are resolved
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339 * at compile-time. Now shared with ANYOF_LOCALE, forcing all locale nodes to
340 * be large */
341#define ANYOF_CLASS ANYOF_LOCALE
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342#define ANYOF_LARGE ANYOF_CLASS /* Same; name retained for back compat */
343
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344/* Should this character class warn if matched against a character above
345 * Unicode */
346#define ANYOF_WARN_SUPER 0x08
347
f4244008 348/* EOS, meaning that it can match an empty string too, is used for the
c613755a 349 * synthetic start class only. */
84193928 350#define ANYOF_EOS 0x10
f4244008 351
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352/* ? Is this node the synthetic start class (ssc). This bit is shared with
353 * ANYOF_EOS, as the latter is used only for the ssc, and then not used by
354 * regexec.c. And, the code is structured so that if it is set, the ssc is
355 * not used, so it is guaranteed to be 0 for the ssc by the time regexec.c
356 * gets executed, and 0 for a non-ssc ANYOF node, as it only ever gets set for
357 * a potential ssc candidate. Thus setting it to 1 after it has been
358 * determined that the ssc will be used is not ambiguous */
359#define ANYOF_IS_SYNTHETIC ANYOF_EOS
360
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361/* Can match something outside the bitmap that isn't in utf8 */
362#define ANYOF_NONBITMAP_NON_UTF8 0x20
363
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364/* Matches every code point 0x100 and above*/
365#define ANYOF_UNICODE_ALL 0x40
ffc61ed2 366
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367/* Match all Latin1 characters that aren't ASCII when the target string is not
368 * in utf8. */
369#define ANYOF_NON_UTF8_LATIN1_ALL 0x80
370
ffc61ed2 371#define ANYOF_FLAGS_ALL 0xff
653099ff 372
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373/* These are the flags that ANYOF_INVERT being set or not doesn't affect
374 * whether they are operative or not. e.g., the node still has LOCALE
375 * regardless of being inverted; whereas ANYOF_UNICODE_ALL means something
376 * different if inverted */
377#define INVERSION_UNAFFECTED_FLAGS (ANYOF_LOCALE \
538b546e 378 |ANYOF_LOC_FOLD \
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379 |ANYOF_CLASS \
380 |ANYOF_EOS \
381 |ANYOF_NONBITMAP_NON_UTF8)
382
936ed897 383/* Character classes for node->classflags of ANYOF */
653099ff 384/* Should be synchronized with a table in regprop() */
575a8a29 385/* 2n should be the normal one, paired with its complement at 2n+1 */
b8c5462f 386
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387#define ANYOF_WORDCHAR ((_CC_WORDCHAR) * 2) /* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */
388#define ANYOF_NWORDCHAR ((ANYOF_WORDCHAR) + 1)
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389#define ANYOF_SPACE ((_CC_SPACE) * 2) /* \s */
390#define ANYOF_NSPACE ((ANYOF_SPACE) + 1)
391#define ANYOF_DIGIT ((_CC_DIGIT) * 2) /* \d */
392#define ANYOF_NDIGIT ((ANYOF_DIGIT) + 1)
393#define ANYOF_ALNUMC ((_CC_ALNUMC) * 2) /* [[:alnum:]] isalnum(3), utf8::IsAlnum, ALNUMC */
394#define ANYOF_NALNUMC ((ANYOF_ALNUMC) + 1)
395#define ANYOF_ALPHA ((_CC_ALPHA) * 2)
396#define ANYOF_NALPHA ((ANYOF_ALPHA) + 1)
397#define ANYOF_ASCII ((_CC_ASCII) * 2)
398#define ANYOF_NASCII ((ANYOF_ASCII) + 1)
399#define ANYOF_CNTRL ((_CC_CNTRL) * 2)
400#define ANYOF_NCNTRL ((ANYOF_CNTRL) + 1)
401#define ANYOF_GRAPH ((_CC_GRAPH) * 2)
402#define ANYOF_NGRAPH ((ANYOF_GRAPH) + 1)
403#define ANYOF_LOWER ((_CC_LOWER) * 2)
404#define ANYOF_NLOWER ((ANYOF_LOWER) + 1)
405#define ANYOF_PRINT ((_CC_PRINT) * 2)
406#define ANYOF_NPRINT ((ANYOF_PRINT) + 1)
407#define ANYOF_PUNCT ((_CC_PUNCT) * 2)
408#define ANYOF_NPUNCT ((ANYOF_PUNCT) + 1)
409#define ANYOF_UPPER ((_CC_UPPER) * 2)
410#define ANYOF_NUPPER ((ANYOF_UPPER) + 1)
411#define ANYOF_XDIGIT ((_CC_XDIGIT) * 2)
412#define ANYOF_NXDIGIT ((ANYOF_XDIGIT) + 1)
413#define ANYOF_PSXSPC ((_CC_PSXSPC) * 2) /* POSIX space: \s plus the vertical tab */
414#define ANYOF_NPSXSPC ((ANYOF_PSXSPC) + 1)
415#define ANYOF_BLANK ((_CC_BLANK) * 2) /* GNU extension: space and tab: non-vertical space */
416#define ANYOF_NBLANK ((ANYOF_BLANK) + 1)
b8c5462f 417
aaa51d5e 418#define ANYOF_MAX 32
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419#if (ANYOF_MAX <= _HIGHEST_REGCOMP_DOT_H_SYNC * 2 + 1)
420# error Problem with handy.h _CC_foo #defines
421#endif
b8c5462f 422
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423/* pseudo classes, not stored in the class bitmap, but used as flags
424 during compilation of char classes */
425
426#define ANYOF_VERTWS (ANYOF_MAX+1)
427#define ANYOF_NVERTWS (ANYOF_MAX+2)
428#define ANYOF_HORIZWS (ANYOF_MAX+3)
429#define ANYOF_NHORIZWS (ANYOF_MAX+4)
430
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431/* Backward source code compatibility. */
432
433#define ANYOF_ALNUML ANYOF_ALNUM
434#define ANYOF_NALNUML ANYOF_NALNUM
435#define ANYOF_SPACEL ANYOF_SPACE
436#define ANYOF_NSPACEL ANYOF_NSPACE
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437#define ANYOF_ALNUM ANYOF_WORDCHAR
438#define ANYOF_NALNUM ANYOF_NWORDCHAR
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439
440/* Utility macros for the bitmap and classes of ANYOF */
441
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442#define ANYOF_SIZE (sizeof(struct regnode_charclass))
443#define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
b8c5462f 444
936ed897 445#define ANYOF_FLAGS(p) ((p)->flags)
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446
447#define ANYOF_BIT(c) (1 << ((c) & 7))
448
936ed897 449#define ANYOF_CLASS_BYTE(p, c) (((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
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JH
450#define ANYOF_CLASS_SET(p, c) (ANYOF_CLASS_BYTE(p, c) |= ANYOF_BIT(c))
451#define ANYOF_CLASS_CLEAR(p, c) (ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
452#define ANYOF_CLASS_TEST(p, c) (ANYOF_CLASS_BYTE(p, c) & ANYOF_BIT(c))
453
936ed897 454#define ANYOF_CLASS_ZERO(ret) Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
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455#define ANYOF_CLASS_SETALL(ret) \
456 memset (((struct regnode_charclass_class*)(ret))->classflags, 255, ANYOF_CLASSBITMAP_SIZE)
936ed897
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457#define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
458
459#define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
786e8c11 460#define ANYOF_BITMAP_BYTE(p, c) (ANYOF_BITMAP(p)[(((U8)(c)) >> 3) & 31])
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JH
461#define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) |= ANYOF_BIT(c))
462#define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
463#define ANYOF_BITMAP_TEST(p, c) (ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c))
464
f8bef550
NC
465#define ANYOF_BITMAP_SETALL(p) \
466 memset (ANYOF_BITMAP(p), 255, ANYOF_BITMAP_SIZE)
467#define ANYOF_BITMAP_CLEARALL(p) \
468 Zero (ANYOF_BITMAP(p), ANYOF_BITMAP_SIZE)
469/* Check that all 256 bits are all set. Used in S_cl_is_anything() */
c355c09a 470#define ANYOF_BITMAP_TESTALLSET(p) /* Assumes sizeof(p) == 32 */ \
f8bef550
NC
471 memEQ (ANYOF_BITMAP(p), "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377", ANYOF_BITMAP_SIZE)
472
936ed897
IZ
473#define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
474#define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
3a15e693 475
dd58aee1
KW
476#if ANYOF_CLASSBITMAP_SIZE != 4
477# error ANYOF_CLASSBITMAP_SIZE is expected to be 4
3a15e693 478#endif
dd58aee1
KW
479#define ANYOF_CLASS_TEST_ANY_SET(p) ((ANYOF_FLAGS(p) & ANYOF_CLASS) \
480 && memNE (((struct regnode_charclass_class*)(p))->classflags, \
481 "\0\0\0\0", ANYOF_CLASSBITMAP_SIZE))
482/*#define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
483 * */
c277df42 484
786e8c11 485
a687059c
LW
486/*
487 * Utility definitions.
488 */
2304df62 489#ifndef CHARMASK
075abff3 490# define UCHARAT(p) ((int)*(const U8*)(p))
a687059c 491#else
075abff3 492# define UCHARAT(p) ((int)*(p)&CHARMASK)
a687059c 493#endif
a687059c 494
c277df42
IZ
495#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
496
3dab1dad
YO
497#define REG_SEEN_ZERO_LEN 0x00000001
498#define REG_SEEN_LOOKBEHIND 0x00000002
499#define REG_SEEN_GPOS 0x00000004
471f5387 500/* spare */
3dab1dad 501#define REG_SEEN_CANY 0x00000010
cce850e4 502#define REG_SEEN_SANY REG_SEEN_CANY /* src bckwrd cmpt */
6bda09f9 503#define REG_SEEN_RECURSE 0x00000020
eaf3ca90 504#define REG_TOP_LEVEL_BRANCHES 0x00000040
e2e6a0f1 505#define REG_SEEN_VERBARG 0x00000080
5d458dd8 506#define REG_SEEN_CUTGROUP 0x00000100
bcdf7404 507#define REG_SEEN_RUN_ON_COMMENT 0x00000200
bb914485 508#define REG_SEEN_EXACTF_SHARP_S 0x00000400
d09b2d29 509
73c4f7a1
GS
510START_EXTERN_C
511
be8e71aa
YO
512#ifdef PLUGGABLE_RE_EXTENSION
513#include "re_nodes.h"
514#else
d09b2d29 515#include "regnodes.h"
be8e71aa 516#endif
d09b2d29 517
f9f4320a
YO
518#ifndef PLUGGABLE_RE_EXTENSION
519#ifndef DOINIT
520EXTCONST regexp_engine PL_core_reg_engine;
521#else /* DOINIT */
522EXTCONST regexp_engine PL_core_reg_engine = {
fe578d7f 523 Perl_re_compile,
2fdbfb4d 524 Perl_regexec_flags,
f9f4320a
YO
525 Perl_re_intuit_start,
526 Perl_re_intuit_string,
2fdbfb4d
AB
527 Perl_regfree_internal,
528 Perl_reg_numbered_buff_fetch,
529 Perl_reg_numbered_buff_store,
530 Perl_reg_numbered_buff_length,
192b9cd1
AB
531 Perl_reg_named_buff,
532 Perl_reg_named_buff_iter,
49d7dfbc 533 Perl_reg_qr_package,
f9f4320a 534#if defined(USE_ITHREADS)
3c13cae6 535 Perl_regdupe_internal,
f9f4320a 536#endif
3c13cae6 537 Perl_re_op_compile
f9f4320a
YO
538};
539#endif /* DOINIT */
540#endif /* PLUGGABLE_RE_EXTENSION */
541
542
73c4f7a1 543END_EXTERN_C
cad2e5aa 544
cad2e5aa 545
261faec3
MJD
546/* .what is a character array with one character for each member of .data
547 * The character describes the function of the corresponding .data item:
af534a04 548 * a - AV for paren_name_list under DEBUGGING
0111c4fd 549 * f - start-class data for regstclass optimization
68e2671b 550 * l - start op for literal (?{EVAL}) item
d63c20f2 551 * L - start op for literal (?{EVAL}) item, with separate CV (qr//)
b30fcab9 552 * r - pointer to an embedded code-containing qr, e.g. /ab$qr/
38a44b82 553 * s - swash for Unicode-style character class, and the multicharacter
9e55ce06
JH
554 * strings resulting from casefolding the single-character entries
555 * in the character class
a3621e74 556 * t - trie struct
55eed653 557 * u - trie struct's widecharmap (a HV, so can't share, must dup)
2b8b4781 558 * also used for revcharmap and words under DEBUGGING
07be1b83 559 * T - aho-trie struct
81714fb9 560 * S - sv for named capture lookup
261faec3 561 * 20010712 mjd@plover.com
c3613ed7 562 * (Remember to update re_dup() and pregfree() if you add any items.)
261faec3 563 */
cad2e5aa
JH
564struct reg_data {
565 U32 count;
566 U8 *what;
567 void* data[1];
568};
569
a1cac82e
NC
570/* Code in S_to_utf8_substr() and S_to_byte_substr() in regexec.c accesses
571 anchored* and float* via array indexes 0 and 1. */
cad2e5aa 572#define anchored_substr substrs->data[0].substr
33b8afdf 573#define anchored_utf8 substrs->data[0].utf8_substr
cad2e5aa 574#define anchored_offset substrs->data[0].min_offset
1de06328
YO
575#define anchored_end_shift substrs->data[0].end_shift
576
cad2e5aa 577#define float_substr substrs->data[1].substr
33b8afdf 578#define float_utf8 substrs->data[1].utf8_substr
cad2e5aa
JH
579#define float_min_offset substrs->data[1].min_offset
580#define float_max_offset substrs->data[1].max_offset
1de06328
YO
581#define float_end_shift substrs->data[1].end_shift
582
cad2e5aa 583#define check_substr substrs->data[2].substr
33b8afdf 584#define check_utf8 substrs->data[2].utf8_substr
cad2e5aa
JH
585#define check_offset_min substrs->data[2].min_offset
586#define check_offset_max substrs->data[2].max_offset
1de06328 587#define check_end_shift substrs->data[2].end_shift
a3621e74 588
8d919b0a
FC
589#define RX_ANCHORED_SUBSTR(rx) (ReANY(rx)->anchored_substr)
590#define RX_ANCHORED_UTF8(rx) (ReANY(rx)->anchored_utf8)
591#define RX_FLOAT_SUBSTR(rx) (ReANY(rx)->float_substr)
592#define RX_FLOAT_UTF8(rx) (ReANY(rx)->float_utf8)
a3621e74
YO
593
594/* trie related stuff */
5d9a96ca 595
a3621e74
YO
596/* a transition record for the state machine. the
597 check field determines which state "owns" the
598 transition. the char the transition is for is
599 determined by offset from the owning states base
600 field. the next field determines which state
601 is to be transitioned to if any.
602*/
603struct _reg_trie_trans {
604 U32 next;
605 U32 check;
606};
607
608/* a transition list element for the list based representation */
609struct _reg_trie_trans_list_elem {
610 U16 forid;
611 U32 newstate;
612};
613typedef struct _reg_trie_trans_list_elem reg_trie_trans_le;
614
615/* a state for compressed nodes. base is an offset
616 into an array of reg_trie_trans array. If wordnum is
617 nonzero the state is accepting. if base is zero then
618 the state has no children (and will be accepting)
619*/
620struct _reg_trie_state {
621 U16 wordnum;
622 union {
623 U32 base;
624 reg_trie_trans_le* list;
625 } trans;
626};
627
2e64971a
DM
628/* info per word; indexed by wordnum */
629typedef struct {
630 U16 prev; /* previous word in acceptance chain; eg in
631 * zzz|abc|ab/ after matching the chars abc, the
632 * accepted word is #2, and the previous accepted
633 * word is #3 */
634 U32 len; /* how many chars long is this word? */
635 U32 accept; /* accept state for this word */
636} reg_trie_wordinfo;
a3621e74
YO
637
638
a3621e74
YO
639typedef struct _reg_trie_state reg_trie_state;
640typedef struct _reg_trie_trans reg_trie_trans;
641
642
643/* anything in here that needs to be freed later
23eab42c
NC
644 should be dealt with in pregfree.
645 refcount is first in both this and _reg_ac_data to allow a space
646 optimisation in Perl_regdupe. */
a3621e74 647struct _reg_trie_data {
23eab42c 648 U32 refcount; /* number of times this trie is referenced */
786e8c11
YO
649 U32 lasttrans; /* last valid transition element */
650 U16 *charmap; /* byte to charid lookup array */
786e8c11
YO
651 reg_trie_state *states; /* state data */
652 reg_trie_trans *trans; /* array of transition elements */
653 char *bitmap; /* stclass bitmap */
786e8c11
YO
654 U16 *jump; /* optional 1 indexed array of offsets before tail
655 for the node following a given word. */
2e64971a 656 reg_trie_wordinfo *wordinfo; /* array of info per word */
1b5c067c
NC
657 U16 uniquecharcount; /* unique chars in trie (width of trans table) */
658 U32 startstate; /* initial state - used for common prefix optimisation */
659 STRLEN minlen; /* minimum length of words in trie - build/opt only? */
660 STRLEN maxlen; /* maximum length of words in trie - build/opt only? */
2e64971a 661 U32 prefixlen; /* #chars in common prefix */
1e2e3d02
YO
662 U32 statecount; /* Build only - number of states in the states array
663 (including the unused zero state) */
786e8c11 664 U32 wordcount; /* Build only */
a3621e74 665#ifdef DEBUGGING
786e8c11 666 STRLEN charcount; /* Build only */
a3621e74
YO
667#endif
668};
2b8b4781
NC
669/* There is one (3 under DEBUGGING) pointers that logically belong in this
670 structure, but are held outside as they need duplication on thread cloning,
671 whereas the rest of the structure can be read only:
672 HV *widecharmap; code points > 255 to charid
673#ifdef DEBUGGING
674 AV *words; Array of words contained in trie, for dumping
675 AV *revcharmap; Map of each charid back to its character representation
676#endif
677*/
678
679#define TRIE_WORDS_OFFSET 2
680
a3621e74
YO
681typedef struct _reg_trie_data reg_trie_data;
682
23eab42c
NC
683/* refcount is first in both this and _reg_trie_data to allow a space
684 optimisation in Perl_regdupe. */
07be1b83 685struct _reg_ac_data {
23eab42c 686 U32 refcount;
1b5c067c 687 U32 trie;
07be1b83
YO
688 U32 *fail;
689 reg_trie_state *states;
07be1b83
YO
690};
691typedef struct _reg_ac_data reg_ac_data;
692
486ec47a 693/* ANY_BIT doesn't use the structure, so we can borrow it here.
3dab1dad
YO
694 This is simpler than refactoring all of it as wed end up with
695 three different sets... */
696
697#define TRIE_BITMAP(p) (((reg_trie_data *)(p))->bitmap)
786e8c11 698#define TRIE_BITMAP_BYTE(p, c) (TRIE_BITMAP(p)[(((U8)(c)) >> 3) & 31])
5dfe062f
YO
699#define TRIE_BITMAP_SET(p, c) (TRIE_BITMAP_BYTE(p, c) |= ANYOF_BIT((U8)c))
700#define TRIE_BITMAP_CLEAR(p,c) (TRIE_BITMAP_BYTE(p, c) &= ~ANYOF_BIT((U8)c))
701#define TRIE_BITMAP_TEST(p, c) (TRIE_BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
3dab1dad 702
1de06328
YO
703#define IS_ANYOF_TRIE(op) ((op)==TRIEC || (op)==AHOCORASICKC)
704#define IS_TRIE_AC(op) ((op)>=AHOCORASICK)
705
706
786e8c11
YO
707#define BITMAP_BYTE(p, c) (((U8*)p)[(((U8)(c)) >> 3) & 31])
708#define BITMAP_TEST(p, c) (BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
3dab1dad 709
a3621e74
YO
710/* these defines assume uniquecharcount is the correct variable, and state may be evaluated twice */
711#define TRIE_NODENUM(state) (((state)-1)/(trie->uniquecharcount)+1)
712#define SAFE_TRIE_NODENUM(state) ((state) ? (((state)-1)/(trie->uniquecharcount)+1) : (state))
713#define TRIE_NODEIDX(state) ((state) ? (((state)-1)*(trie->uniquecharcount)+1) : (state))
714
3dab1dad 715#ifdef DEBUGGING
3dab1dad 716#define TRIE_CHARCOUNT(trie) ((trie)->charcount)
3dab1dad 717#else
3dab1dad 718#define TRIE_CHARCOUNT(trie) (trie_charcount)
3dab1dad 719#endif
a3621e74 720
0111c4fd
RGS
721#define RE_TRIE_MAXBUF_INIT 65536
722#define RE_TRIE_MAXBUF_NAME "\022E_TRIE_MAXBUF"
a3621e74
YO
723#define RE_DEBUG_FLAGS "\022E_DEBUG_FLAGS"
724
be8e71aa
YO
725/*
726
727RE_DEBUG_FLAGS is used to control what debug output is emitted
728its divided into three groups of options, some of which interact.
729The three groups are: Compile, Execute, Extra. There is room for a
730further group, as currently only the low three bytes are used.
731
732 Compile Options:
07be1b83 733
be8e71aa
YO
734 PARSE
735 PEEP
736 TRIE
737 PROGRAM
738 OFFSETS
a3621e74 739
be8e71aa 740 Execute Options:
a3621e74 741
be8e71aa
YO
742 INTUIT
743 MATCH
744 TRIE
a3621e74 745
be8e71aa 746 Extra Options
a3621e74 747
be8e71aa
YO
748 TRIE
749 OFFSETS
750
751If you modify any of these make sure you make corresponding changes to
752re.pm, especially to the documentation.
a3621e74 753
be8e71aa
YO
754*/
755
756
757/* Compile */
758#define RE_DEBUG_COMPILE_MASK 0x0000FF
759#define RE_DEBUG_COMPILE_PARSE 0x000001
760#define RE_DEBUG_COMPILE_OPTIMISE 0x000002
761#define RE_DEBUG_COMPILE_TRIE 0x000004
762#define RE_DEBUG_COMPILE_DUMP 0x000008
f7819f85 763#define RE_DEBUG_COMPILE_FLAGS 0x000010
be8e71aa
YO
764
765/* Execute */
766#define RE_DEBUG_EXECUTE_MASK 0x00FF00
767#define RE_DEBUG_EXECUTE_INTUIT 0x000100
768#define RE_DEBUG_EXECUTE_MATCH 0x000200
769#define RE_DEBUG_EXECUTE_TRIE 0x000400
770
771/* Extra */
772#define RE_DEBUG_EXTRA_MASK 0xFF0000
773#define RE_DEBUG_EXTRA_TRIE 0x010000
774#define RE_DEBUG_EXTRA_OFFSETS 0x020000
a5ca303d
YO
775#define RE_DEBUG_EXTRA_OFFDEBUG 0x040000
776#define RE_DEBUG_EXTRA_STATE 0x080000
777#define RE_DEBUG_EXTRA_OPTIMISE 0x100000
e7707071 778#define RE_DEBUG_EXTRA_BUFFERS 0x400000
2c296965 779#define RE_DEBUG_EXTRA_GPOS 0x800000
24b23f37
YO
780/* combined */
781#define RE_DEBUG_EXTRA_STACK 0x280000
be8e71aa 782
e68ec53f 783#define RE_DEBUG_FLAG(x) (re_debug_flags & x)
be8e71aa
YO
784/* Compile */
785#define DEBUG_COMPILE_r(x) DEBUG_r( \
e68ec53f 786 if (re_debug_flags & RE_DEBUG_COMPILE_MASK) x )
be8e71aa 787#define DEBUG_PARSE_r(x) DEBUG_r( \
e68ec53f 788 if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
be8e71aa 789#define DEBUG_OPTIMISE_r(x) DEBUG_r( \
e68ec53f 790 if (re_debug_flags & RE_DEBUG_COMPILE_OPTIMISE) x )
be8e71aa 791#define DEBUG_PARSE_r(x) DEBUG_r( \
e68ec53f 792 if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
be8e71aa 793#define DEBUG_DUMP_r(x) DEBUG_r( \
e68ec53f 794 if (re_debug_flags & RE_DEBUG_COMPILE_DUMP) x )
be8e71aa 795#define DEBUG_TRIE_COMPILE_r(x) DEBUG_r( \
e68ec53f 796 if (re_debug_flags & RE_DEBUG_COMPILE_TRIE) x )
f7819f85
A
797#define DEBUG_FLAGS_r(x) DEBUG_r( \
798 if (re_debug_flags & RE_DEBUG_COMPILE_FLAGS) x )
be8e71aa
YO
799/* Execute */
800#define DEBUG_EXECUTE_r(x) DEBUG_r( \
e68ec53f 801 if (re_debug_flags & RE_DEBUG_EXECUTE_MASK) x )
be8e71aa 802#define DEBUG_INTUIT_r(x) DEBUG_r( \
e68ec53f 803 if (re_debug_flags & RE_DEBUG_EXECUTE_INTUIT) x )
be8e71aa 804#define DEBUG_MATCH_r(x) DEBUG_r( \
e68ec53f 805 if (re_debug_flags & RE_DEBUG_EXECUTE_MATCH) x )
be8e71aa 806#define DEBUG_TRIE_EXECUTE_r(x) DEBUG_r( \
e68ec53f 807 if (re_debug_flags & RE_DEBUG_EXECUTE_TRIE) x )
be8e71aa
YO
808
809/* Extra */
810#define DEBUG_EXTRA_r(x) DEBUG_r( \
e68ec53f 811 if (re_debug_flags & RE_DEBUG_EXTRA_MASK) x )
a5ca303d
YO
812#define DEBUG_OFFSETS_r(x) DEBUG_r( \
813 if (re_debug_flags & RE_DEBUG_EXTRA_OFFSETS) x )
ab3bbdeb
YO
814#define DEBUG_STATE_r(x) DEBUG_r( \
815 if (re_debug_flags & RE_DEBUG_EXTRA_STATE) x )
24b23f37
YO
816#define DEBUG_STACK_r(x) DEBUG_r( \
817 if (re_debug_flags & RE_DEBUG_EXTRA_STACK) x )
e7707071
YO
818#define DEBUG_BUFFERS_r(x) DEBUG_r( \
819 if (re_debug_flags & RE_DEBUG_EXTRA_BUFFERS) x )
820
a5ca303d
YO
821#define DEBUG_OPTIMISE_MORE_r(x) DEBUG_r( \
822 if ((RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE) == \
823 (re_debug_flags & (RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE)) ) x )
07be1b83 824#define MJD_OFFSET_DEBUG(x) DEBUG_r( \
a5ca303d 825 if (re_debug_flags & RE_DEBUG_EXTRA_OFFDEBUG) \
be8e71aa
YO
826 Perl_warn_nocontext x )
827#define DEBUG_TRIE_COMPILE_MORE_r(x) DEBUG_TRIE_COMPILE_r( \
e68ec53f 828 if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
be8e71aa 829#define DEBUG_TRIE_EXECUTE_MORE_r(x) DEBUG_TRIE_EXECUTE_r( \
e68ec53f 830 if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
be8e71aa
YO
831
832#define DEBUG_TRIE_r(x) DEBUG_r( \
e68ec53f 833 if (re_debug_flags & (RE_DEBUG_COMPILE_TRIE \
be8e71aa 834 | RE_DEBUG_EXECUTE_TRIE )) x )
2c296965
YO
835#define DEBUG_GPOS_r(x) DEBUG_r( \
836 if (re_debug_flags & RE_DEBUG_EXTRA_GPOS) x )
be8e71aa
YO
837
838/* initialization */
595598ee
KW
839/* get_sv() can return NULL during global destruction. re_debug_flags can get
840 * clobbered by a longjmp, so must be initialized */
e68ec53f
YO
841#define GET_RE_DEBUG_FLAGS DEBUG_r({ \
842 SV * re_debug_flags_sv = NULL; \
595598ee 843 re_debug_flags = 0; \
e68ec53f
YO
844 re_debug_flags_sv = get_sv(RE_DEBUG_FLAGS, 1); \
845 if (re_debug_flags_sv) { \
8e9a8a48 846 if (!SvIOK(re_debug_flags_sv)) \
e68ec53f 847 sv_setuv(re_debug_flags_sv, RE_DEBUG_COMPILE_DUMP | RE_DEBUG_EXECUTE_MASK ); \
8e9a8a48 848 re_debug_flags=SvIV(re_debug_flags_sv); \
e68ec53f
YO
849 }\
850})
a3621e74
YO
851
852#ifdef DEBUGGING
ab3bbdeb 853
9c4fdda1 854#define GET_RE_DEBUG_FLAGS_DECL VOL IV re_debug_flags \
9d63fa07 855 PERL_UNUSED_DECL = 0; GET_RE_DEBUG_FLAGS;
ab3bbdeb
YO
856
857#define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2) \
858 const char * const rpv = \
ddc5bc0f 859 pv_pretty((dsv), (pv), (l), (m), \
ab3bbdeb 860 PL_colors[(c1)],PL_colors[(c2)], \
c89df6cf 861 PERL_PV_ESCAPE_RE|PERL_PV_ESCAPE_NONASCII |((isuni) ? PERL_PV_ESCAPE_UNI : 0) ); \
0df25f3d 862 const int rlen = SvCUR(dsv)
ab3bbdeb
YO
863
864#define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m) \
865 const char * const rpv = \
ddc5bc0f 866 pv_pretty((dsv), (SvPV_nolen_const(sv)), (SvCUR(sv)), (m), \
ab3bbdeb 867 PL_colors[(c1)],PL_colors[(c2)], \
c89df6cf 868 PERL_PV_ESCAPE_RE|PERL_PV_ESCAPE_NONASCII |((isuni) ? PERL_PV_ESCAPE_UNI : 0) )
ab3bbdeb
YO
869
870#define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m) \
871 const char * const rpv = \
ddc5bc0f 872 pv_pretty((dsv), (pv), (l), (m), \
ab3bbdeb 873 PL_colors[0], PL_colors[1], \
c89df6cf 874 ( PERL_PV_PRETTY_QUOTE | PERL_PV_ESCAPE_RE | PERL_PV_ESCAPE_NONASCII | PERL_PV_PRETTY_ELLIPSES | \
ab3bbdeb 875 ((isuni) ? PERL_PV_ESCAPE_UNI : 0)) \
0a0e9afc 876 )
ab3bbdeb
YO
877
878#define RE_SV_DUMPLEN(ItEm) (SvCUR(ItEm) - (SvTAIL(ItEm)!=0))
879#define RE_SV_TAIL(ItEm) (SvTAIL(ItEm) ? "$" : "")
880
881#else /* if not DEBUGGING */
882
a3621e74 883#define GET_RE_DEBUG_FLAGS_DECL
ab3bbdeb
YO
884#define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2)
885#define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m)
886#define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m)
887#define RE_SV_DUMPLEN(ItEm)
888#define RE_SV_TAIL(ItEm)
889
890#endif /* DEBUG RELATED DEFINES */
a3621e74 891
e9a8c099
MHM
892/*
893 * Local variables:
894 * c-indentation-style: bsd
895 * c-basic-offset: 4
14d04a33 896 * indent-tabs-mode: nil
e9a8c099
MHM
897 * End:
898 *
14d04a33 899 * ex: set ts=8 sts=4 sw=4 et:
e9a8c099 900 */