This file is indexed.

/usr/include/pcrecpp.h is in libpcre3-dev 2:8.39-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
// Copyright (c) 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: Sanjay Ghemawat
// Support for PCRE_XXX modifiers added by Giuseppe Maxia, July 2005

#ifndef _PCRECPP_H
#define _PCRECPP_H

// C++ interface to the pcre regular-expression library.  RE supports
// Perl-style regular expressions (with extensions like \d, \w, \s,
// ...).
//
// -----------------------------------------------------------------------
// REGEXP SYNTAX:
//
// This module is part of the pcre library and hence supports its syntax
// for regular expressions.
//
// The syntax is pretty similar to Perl's.  For those not familiar
// with Perl's regular expressions, here are some examples of the most
// commonly used extensions:
//
//   "hello (\\w+) world"  -- \w matches a "word" character
//   "version (\\d+)"      -- \d matches a digit
//   "hello\\s+world"      -- \s matches any whitespace character
//   "\\b(\\w+)\\b"        -- \b matches empty string at a word boundary
//   "(?i)hello"           -- (?i) turns on case-insensitive matching
//   "/\\*(.*?)\\*/"       -- .*? matches . minimum no. of times possible
//
// -----------------------------------------------------------------------
// MATCHING INTERFACE:
//
// The "FullMatch" operation checks that supplied text matches a
// supplied pattern exactly.
//
// Example: successful match
//    pcrecpp::RE re("h.*o");
//    re.FullMatch("hello");
//
// Example: unsuccessful match (requires full match):
//    pcrecpp::RE re("e");
//    !re.FullMatch("hello");
//
// Example: creating a temporary RE object:
//    pcrecpp::RE("h.*o").FullMatch("hello");
//
// You can pass in a "const char*" or a "string" for "text".  The
// examples below tend to use a const char*.
//
// You can, as in the different examples above, store the RE object
// explicitly in a variable or use a temporary RE object.  The
// examples below use one mode or the other arbitrarily.  Either
// could correctly be used for any of these examples.
//
// -----------------------------------------------------------------------
// MATCHING WITH SUB-STRING EXTRACTION:
//
// You can supply extra pointer arguments to extract matched subpieces.
//
// Example: extracts "ruby" into "s" and 1234 into "i"
//    int i;
//    string s;
//    pcrecpp::RE re("(\\w+):(\\d+)");
//    re.FullMatch("ruby:1234", &s, &i);
//
// Example: does not try to extract any extra sub-patterns
//    re.FullMatch("ruby:1234", &s);
//
// Example: does not try to extract into NULL
//    re.FullMatch("ruby:1234", NULL, &i);
//
// Example: integer overflow causes failure
//    !re.FullMatch("ruby:1234567891234", NULL, &i);
//
// Example: fails because there aren't enough sub-patterns:
//    !pcrecpp::RE("\\w+:\\d+").FullMatch("ruby:1234", &s);
//
// Example: fails because string cannot be stored in integer
//    !pcrecpp::RE("(.*)").FullMatch("ruby", &i);
//
// The provided pointer arguments can be pointers to any scalar numeric
// type, or one of
//    string        (matched piece is copied to string)
//    StringPiece   (StringPiece is mutated to point to matched piece)
//    T             (where "bool T::ParseFrom(const char*, int)" exists)
//    NULL          (the corresponding matched sub-pattern is not copied)
//
// CAVEAT: An optional sub-pattern that does not exist in the matched
// string is assigned the empty string.  Therefore, the following will
// return false (because the empty string is not a valid number):
//    int number;
//    pcrecpp::RE::FullMatch("abc", "[a-z]+(\\d+)?", &number);
//
// -----------------------------------------------------------------------
// DO_MATCH
//
// The matching interface supports at most 16 arguments per call.
// If you need more, consider using the more general interface
// pcrecpp::RE::DoMatch().  See pcrecpp.h for the signature for DoMatch.
//
// -----------------------------------------------------------------------
// PARTIAL MATCHES
//
// You can use the "PartialMatch" operation when you want the pattern
// to match any substring of the text.
//
// Example: simple search for a string:
//    pcrecpp::RE("ell").PartialMatch("hello");
//
// Example: find first number in a string:
//    int number;
//    pcrecpp::RE re("(\\d+)");
//    re.PartialMatch("x*100 + 20", &number);
//    assert(number == 100);
//
// -----------------------------------------------------------------------
// UTF-8 AND THE MATCHING INTERFACE:
//
// By default, pattern and text are plain text, one byte per character.
// The UTF8 flag, passed to the constructor, causes both pattern
// and string to be treated as UTF-8 text, still a byte stream but
// potentially multiple bytes per character. In practice, the text
// is likelier to be UTF-8 than the pattern, but the match returned
// may depend on the UTF8 flag, so always use it when matching
// UTF8 text.  E.g., "." will match one byte normally but with UTF8
// set may match up to three bytes of a multi-byte character.
//
// Example:
//    pcrecpp::RE_Options options;
//    options.set_utf8();
//    pcrecpp::RE re(utf8_pattern, options);
//    re.FullMatch(utf8_string);
//
// Example: using the convenience function UTF8():
//    pcrecpp::RE re(utf8_pattern, pcrecpp::UTF8());
//    re.FullMatch(utf8_string);
//
// NOTE: The UTF8 option is ignored if pcre was not configured with the
//       --enable-utf8 flag.
//
// -----------------------------------------------------------------------
// PASSING MODIFIERS TO THE REGULAR EXPRESSION ENGINE
//
// PCRE defines some modifiers to change the behavior of the regular
// expression engine.
// The C++ wrapper defines an auxiliary class, RE_Options, as a vehicle
// to pass such modifiers to a RE class.
//
// Currently, the following modifiers are supported
//
//    modifier              description               Perl corresponding
//
//    PCRE_CASELESS         case insensitive match    /i
//    PCRE_MULTILINE        multiple lines match      /m
//    PCRE_DOTALL           dot matches newlines      /s
//    PCRE_DOLLAR_ENDONLY   $ matches only at end     N/A
//    PCRE_EXTRA            strict escape parsing     N/A
//    PCRE_EXTENDED         ignore whitespaces        /x
//    PCRE_UTF8             handles UTF8 chars        built-in
//    PCRE_UNGREEDY         reverses * and *?         N/A
//    PCRE_NO_AUTO_CAPTURE  disables matching parens  N/A (*)
//
// (For a full account on how each modifier works, please check the
// PCRE API reference manual).
//
// (*) Both Perl and PCRE allow non matching parentheses by means of the
// "?:" modifier within the pattern itself. e.g. (?:ab|cd) does not
// capture, while (ab|cd) does.
//
// For each modifier, there are two member functions whose name is made
// out of the modifier in lowercase, without the "PCRE_" prefix. For
// instance, PCRE_CASELESS is handled by
//    bool caseless(),
// which returns true if the modifier is set, and
//    RE_Options & set_caseless(bool),
// which sets or unsets the modifier.
//
// Moreover, PCRE_EXTRA_MATCH_LIMIT can be accessed through the
// set_match_limit() and match_limit() member functions.
// Setting match_limit to a non-zero value will limit the executation of
// pcre to keep it from doing bad things like blowing the stack or taking
// an eternity to return a result.  A value of 5000 is good enough to stop
// stack blowup in a 2MB thread stack.  Setting match_limit to zero will
// disable match limiting.  Alternately, you can set match_limit_recursion()
// which uses PCRE_EXTRA_MATCH_LIMIT_RECURSION to limit how much pcre
// recurses.  match_limit() caps the number of matches pcre does;
// match_limit_recrusion() caps the depth of recursion.
//
// Normally, to pass one or more modifiers to a RE class, you declare
// a RE_Options object, set the appropriate options, and pass this
// object to a RE constructor. Example:
//
//    RE_options opt;
//    opt.set_caseless(true);
//
//    if (RE("HELLO", opt).PartialMatch("hello world")) ...
//
// RE_options has two constructors. The default constructor takes no
// arguments and creates a set of flags that are off by default.
//
// The optional parameter 'option_flags' is to facilitate transfer
// of legacy code from C programs.  This lets you do
//    RE(pattern, RE_Options(PCRE_CASELESS|PCRE_MULTILINE)).PartialMatch(str);
//
// But new code is better off doing
//    RE(pattern,
//      RE_Options().set_caseless(true).set_multiline(true)).PartialMatch(str);
// (See below)
//
// If you are going to pass one of the most used modifiers, there are some
// convenience functions that return a RE_Options class with the
// appropriate modifier already set:
// CASELESS(), UTF8(), MULTILINE(), DOTALL(), EXTENDED()
//
// If you need to set several options at once, and you don't want to go
// through the pains of declaring a RE_Options object and setting several
// options, there is a parallel method that give you such ability on the
// fly. You can concatenate several set_xxxxx member functions, since each
// of them returns a reference to its class object.  e.g.: to pass
// PCRE_CASELESS, PCRE_EXTENDED, and PCRE_MULTILINE to a RE with one
// statement, you may write
//
//    RE(" ^ xyz \\s+ .* blah$", RE_Options()
//                            .set_caseless(true)
//                            .set_extended(true)
//                            .set_multiline(true)).PartialMatch(sometext);
//
// -----------------------------------------------------------------------
// SCANNING TEXT INCREMENTALLY
//
// The "Consume" operation may be useful if you want to repeatedly
// match regular expressions at the front of a string and skip over
// them as they match.  This requires use of the "StringPiece" type,
// which represents a sub-range of a real string.  Like RE, StringPiece
// is defined in the pcrecpp namespace.
//
// Example: read lines of the form "var = value" from a string.
//    string contents = ...;                 // Fill string somehow
//    pcrecpp::StringPiece input(contents);  // Wrap in a StringPiece
//
//    string var;
//    int value;
//    pcrecpp::RE re("(\\w+) = (\\d+)\n");
//    while (re.Consume(&input, &var, &value)) {
//      ...;
//    }
//
// Each successful call to "Consume" will set "var/value", and also
// advance "input" so it points past the matched text.
//
// The "FindAndConsume" operation is similar to "Consume" but does not
// anchor your match at the beginning of the string.  For example, you
// could extract all words from a string by repeatedly calling
//     pcrecpp::RE("(\\w+)").FindAndConsume(&input, &word)
//
// -----------------------------------------------------------------------
// PARSING HEX/OCTAL/C-RADIX NUMBERS
//
// By default, if you pass a pointer to a numeric value, the
// corresponding text is interpreted as a base-10 number.  You can
// instead wrap the pointer with a call to one of the operators Hex(),
// Octal(), or CRadix() to interpret the text in another base.  The
// CRadix operator interprets C-style "0" (base-8) and "0x" (base-16)
// prefixes, but defaults to base-10.
//
// Example:
//   int a, b, c, d;
//   pcrecpp::RE re("(.*) (.*) (.*) (.*)");
//   re.FullMatch("100 40 0100 0x40",
//                pcrecpp::Octal(&a), pcrecpp::Hex(&b),
//                pcrecpp::CRadix(&c), pcrecpp::CRadix(&d));
// will leave 64 in a, b, c, and d.
//
// -----------------------------------------------------------------------
// REPLACING PARTS OF STRINGS
//
// You can replace the first match of "pattern" in "str" with
// "rewrite".  Within "rewrite", backslash-escaped digits (\1 to \9)
// can be used to insert text matching corresponding parenthesized
// group from the pattern.  \0 in "rewrite" refers to the entire
// matching text.  E.g.,
//
//   string s = "yabba dabba doo";
//   pcrecpp::RE("b+").Replace("d", &s);
//
// will leave "s" containing "yada dabba doo".  The result is true if
// the pattern matches and a replacement occurs, or false otherwise.
//
// GlobalReplace() is like Replace(), except that it replaces all
// occurrences of the pattern in the string with the rewrite.
// Replacements are not subject to re-matching.  E.g.,
//
//   string s = "yabba dabba doo";
//   pcrecpp::RE("b+").GlobalReplace("d", &s);
//
// will leave "s" containing "yada dada doo".  It returns the number
// of replacements made.
//
// Extract() is like Replace(), except that if the pattern matches,
// "rewrite" is copied into "out" (an additional argument) with
// substitutions.  The non-matching portions of "text" are ignored.
// Returns true iff a match occurred and the extraction happened
// successfully.  If no match occurs, the string is left unaffected.


#include <string>
#include <pcre.h>
#include <pcrecpparg.h>   // defines the Arg class
// This isn't technically needed here, but we include it
// anyway so folks who include pcrecpp.h don't have to.
#include <pcre_stringpiece.h>

namespace pcrecpp {

#define PCRE_SET_OR_CLEAR(b, o) \
    if (b) all_options_ |= (o); else all_options_ &= ~(o); \
    return *this

#define PCRE_IS_SET(o)  \
        (all_options_ & o) == o

/***** Compiling regular expressions: the RE class *****/

// RE_Options allow you to set options to be passed along to pcre,
// along with other options we put on top of pcre.
// Only 9 modifiers, plus match_limit and match_limit_recursion,
// are supported now.
class PCRECPP_EXP_DEFN RE_Options {
 public:
  // constructor
  RE_Options() : match_limit_(0), match_limit_recursion_(0), all_options_(0) {}

  // alternative constructor.
  // To facilitate transfer of legacy code from C programs
  //
  // This lets you do
  //    RE(pattern, RE_Options(PCRE_CASELESS|PCRE_MULTILINE)).PartialMatch(str);
  // But new code is better off doing
  //    RE(pattern,
  //      RE_Options().set_caseless(true).set_multiline(true)).PartialMatch(str);
  RE_Options(int option_flags) : match_limit_(0), match_limit_recursion_(0),
                                 all_options_(option_flags) {}
  // we're fine with the default destructor, copy constructor, etc.

  // accessors and mutators
  int match_limit() const { return match_limit_; };
  RE_Options &set_match_limit(int limit) {
    match_limit_ = limit;
    return *this;
  }

  int match_limit_recursion() const { return match_limit_recursion_; };
  RE_Options &set_match_limit_recursion(int limit) {
    match_limit_recursion_ = limit;
    return *this;
  }

  bool caseless() const {
    return PCRE_IS_SET(PCRE_CASELESS);
  }
  RE_Options &set_caseless(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_CASELESS);
  }

  bool multiline() const {
    return PCRE_IS_SET(PCRE_MULTILINE);
  }
  RE_Options &set_multiline(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_MULTILINE);
  }

  bool dotall() const {
    return PCRE_IS_SET(PCRE_DOTALL);
  }
  RE_Options &set_dotall(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_DOTALL);
  }

  bool extended() const {
    return PCRE_IS_SET(PCRE_EXTENDED);
  }
  RE_Options &set_extended(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_EXTENDED);
  }

  bool dollar_endonly() const {
    return PCRE_IS_SET(PCRE_DOLLAR_ENDONLY);
  }
  RE_Options &set_dollar_endonly(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_DOLLAR_ENDONLY);
  }

  bool extra() const {
    return PCRE_IS_SET(PCRE_EXTRA);
  }
  RE_Options &set_extra(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_EXTRA);
  }

  bool ungreedy() const {
    return PCRE_IS_SET(PCRE_UNGREEDY);
  }
  RE_Options &set_ungreedy(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_UNGREEDY);
  }

  bool utf8() const {
    return PCRE_IS_SET(PCRE_UTF8);
  }
  RE_Options &set_utf8(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_UTF8);
  }

  bool no_auto_capture() const {
    return PCRE_IS_SET(PCRE_NO_AUTO_CAPTURE);
  }
  RE_Options &set_no_auto_capture(bool x) {
    PCRE_SET_OR_CLEAR(x, PCRE_NO_AUTO_CAPTURE);
  }

  RE_Options &set_all_options(int opt) {
    all_options_ = opt;
    return *this;
  }
  int all_options() const {
    return all_options_ ;
  }

  // TODO: add other pcre flags

 private:
  int match_limit_;
  int match_limit_recursion_;
  int all_options_;
};

// These functions return some common RE_Options
static inline RE_Options UTF8() {
  return RE_Options().set_utf8(true);
}

static inline RE_Options CASELESS() {
  return RE_Options().set_caseless(true);
}
static inline RE_Options MULTILINE() {
  return RE_Options().set_multiline(true);
}

static inline RE_Options DOTALL() {
  return RE_Options().set_dotall(true);
}

static inline RE_Options EXTENDED() {
  return RE_Options().set_extended(true);
}

// Interface for regular expression matching.  Also corresponds to a
// pre-compiled regular expression.  An "RE" object is safe for
// concurrent use by multiple threads.
class PCRECPP_EXP_DEFN RE {
 public:
  // We provide implicit conversions from strings so that users can
  // pass in a string or a "const char*" wherever an "RE" is expected.
  RE(const string& pat) { Init(pat, NULL); }
  RE(const string& pat, const RE_Options& option) { Init(pat, &option); }
  RE(const char* pat) { Init(pat, NULL); }
  RE(const char* pat, const RE_Options& option) { Init(pat, &option); }
  RE(const unsigned char* pat) {
    Init(reinterpret_cast<const char*>(pat), NULL);
  }
  RE(const unsigned char* pat, const RE_Options& option) {
    Init(reinterpret_cast<const char*>(pat), &option);
  }

  // Copy constructor & assignment - note that these are expensive
  // because they recompile the expression.
  RE(const RE& re) { Init(re.pattern_, &re.options_); }
  const RE& operator=(const RE& re) {
    if (this != &re) {
      Cleanup();

      // This is the code that originally came from Google
      // Init(re.pattern_.c_str(), &re.options_);

      // This is the replacement from Ari Pollak
      Init(re.pattern_, &re.options_);
    }
    return *this;
  }


  ~RE();

  // The string specification for this RE.  E.g.
  //   RE re("ab*c?d+");
  //   re.pattern();    // "ab*c?d+"
  const string& pattern() const { return pattern_; }

  // If RE could not be created properly, returns an error string.
  // Else returns the empty string.
  const string& error() const { return *error_; }

  /***** The useful part: the matching interface *****/

  // This is provided so one can do pattern.ReplaceAll() just as
  // easily as ReplaceAll(pattern-text, ....)

  bool FullMatch(const StringPiece& text,
                 const Arg& ptr1 = no_arg,
                 const Arg& ptr2 = no_arg,
                 const Arg& ptr3 = no_arg,
                 const Arg& ptr4 = no_arg,
                 const Arg& ptr5 = no_arg,
                 const Arg& ptr6 = no_arg,
                 const Arg& ptr7 = no_arg,
                 const Arg& ptr8 = no_arg,
                 const Arg& ptr9 = no_arg,
                 const Arg& ptr10 = no_arg,
                 const Arg& ptr11 = no_arg,
                 const Arg& ptr12 = no_arg,
                 const Arg& ptr13 = no_arg,
                 const Arg& ptr14 = no_arg,
                 const Arg& ptr15 = no_arg,
                 const Arg& ptr16 = no_arg) const;

  bool PartialMatch(const StringPiece& text,
                    const Arg& ptr1 = no_arg,
                    const Arg& ptr2 = no_arg,
                    const Arg& ptr3 = no_arg,
                    const Arg& ptr4 = no_arg,
                    const Arg& ptr5 = no_arg,
                    const Arg& ptr6 = no_arg,
                    const Arg& ptr7 = no_arg,
                    const Arg& ptr8 = no_arg,
                    const Arg& ptr9 = no_arg,
                    const Arg& ptr10 = no_arg,
                    const Arg& ptr11 = no_arg,
                    const Arg& ptr12 = no_arg,
                    const Arg& ptr13 = no_arg,
                    const Arg& ptr14 = no_arg,
                    const Arg& ptr15 = no_arg,
                    const Arg& ptr16 = no_arg) const;

  bool Consume(StringPiece* input,
               const Arg& ptr1 = no_arg,
               const Arg& ptr2 = no_arg,
               const Arg& ptr3 = no_arg,
               const Arg& ptr4 = no_arg,
               const Arg& ptr5 = no_arg,
               const Arg& ptr6 = no_arg,
               const Arg& ptr7 = no_arg,
               const Arg& ptr8 = no_arg,
               const Arg& ptr9 = no_arg,
               const Arg& ptr10 = no_arg,
               const Arg& ptr11 = no_arg,
               const Arg& ptr12 = no_arg,
               const Arg& ptr13 = no_arg,
               const Arg& ptr14 = no_arg,
               const Arg& ptr15 = no_arg,
               const Arg& ptr16 = no_arg) const;

  bool FindAndConsume(StringPiece* input,
                      const Arg& ptr1 = no_arg,
                      const Arg& ptr2 = no_arg,
                      const Arg& ptr3 = no_arg,
                      const Arg& ptr4 = no_arg,
                      const Arg& ptr5 = no_arg,
                      const Arg& ptr6 = no_arg,
                      const Arg& ptr7 = no_arg,
                      const Arg& ptr8 = no_arg,
                      const Arg& ptr9 = no_arg,
                      const Arg& ptr10 = no_arg,
                      const Arg& ptr11 = no_arg,
                      const Arg& ptr12 = no_arg,
                      const Arg& ptr13 = no_arg,
                      const Arg& ptr14 = no_arg,
                      const Arg& ptr15 = no_arg,
                      const Arg& ptr16 = no_arg) const;

  bool Replace(const StringPiece& rewrite,
               string *str) const;

  int GlobalReplace(const StringPiece& rewrite,
                    string *str) const;

  bool Extract(const StringPiece &rewrite,
               const StringPiece &text,
               string *out) const;

  // Escapes all potentially meaningful regexp characters in
  // 'unquoted'.  The returned string, used as a regular expression,
  // will exactly match the original string.  For example,
  //           1.5-2.0?
  // may become:
  //           1\.5\-2\.0\?
  // Note QuoteMeta behaves the same as perl's QuoteMeta function,
  // *except* that it escapes the NUL character (\0) as backslash + 0,
  // rather than backslash + NUL.
  static string QuoteMeta(const StringPiece& unquoted);


  /***** Generic matching interface *****/

  // Type of match (TODO: Should be restructured as part of RE_Options)
  enum Anchor {
    UNANCHORED,         // No anchoring
    ANCHOR_START,       // Anchor at start only
    ANCHOR_BOTH         // Anchor at start and end
  };

  // General matching routine.  Stores the length of the match in
  // "*consumed" if successful.
  bool DoMatch(const StringPiece& text,
               Anchor anchor,
               int* consumed,
               const Arg* const* args, int n) const;

  // Return the number of capturing subpatterns, or -1 if the
  // regexp wasn't valid on construction.
  int NumberOfCapturingGroups() const;

  // The default value for an argument, to indicate the end of the argument
  // list. This must be used only in optional argument defaults. It should NOT
  // be passed explicitly. Some people have tried to use it like this:
  //
  //   FullMatch(x, y, &z, no_arg, &w);
  //
  // This is a mistake, and will not work.
  static Arg no_arg;

 private:

  void Init(const string& pattern, const RE_Options* options);
  // Old version from PCRE 6.x, for compatibility
  void Init(const char *pattern, const RE_Options* options);
  void Cleanup();

  // Match against "text", filling in "vec" (up to "vecsize" * 2/3) with
  // pairs of integers for the beginning and end positions of matched
  // text.  The first pair corresponds to the entire matched text;
  // subsequent pairs correspond, in order, to parentheses-captured
  // matches.  Returns the number of pairs (one more than the number of
  // the last subpattern with a match) if matching was successful
  // and zero if the match failed.
  // I.e. for RE("(foo)|(bar)|(baz)") it will return 2, 3, and 4 when matching
  // against "foo", "bar", and "baz" respectively.
  // When matching RE("(foo)|hello") against "hello", it will return 1.
  // But the values for all subpattern are filled in into "vec".
  int TryMatch(const StringPiece& text,
               int startpos,
               Anchor anchor,
               bool empty_ok,
               int *vec,
               int vecsize) const;

  // Append the "rewrite" string, with backslash subsitutions from "text"
  // and "vec", to string "out".
  bool Rewrite(string *out,
               const StringPiece& rewrite,
               const StringPiece& text,
               int *vec,
               int veclen) const;

  // internal implementation for DoMatch
  bool DoMatchImpl(const StringPiece& text,
                   Anchor anchor,
                   int* consumed,
                   const Arg* const args[],
                   int n,
                   int* vec,
                   int vecsize) const;

  // Compile the regexp for the specified anchoring mode
  pcre* Compile(Anchor anchor);

  string        pattern_;
  RE_Options    options_;
  pcre*         re_full_;       // For full matches
  pcre*         re_partial_;    // For partial matches
  const string* error_;         // Error indicator (or points to empty string)
};

}   // namespace pcrecpp

#endif /* _PCRECPP_H */