+++ /dev/null
-// 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);
- 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 */
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