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regex.h
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regex.h
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is COID/comm module.
*
* The Initial Developer of the Original Code is
* Brano Kemen
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef __COMM_REGEX__HEADER_FILE__
#define __COMM_REGEX__HEADER_FILE__
#include "commtypes.h"
COID_NAMESPACE_BEGIN
struct regex_program;
struct token;
//template<class T, class COUNT=uints, class A=comm_array_allocator<T> > class dynarray;
///Regular expression class
/**
Uses multiple-state implementation of NFA.
Syntax:
metacharacters: .*+?[]()|\^$ must be escaped by \ when used as literals
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character
in (or not in) s. A negated character class never matches newline. A substring a-b,
with a and b in ascending order, stands for the inclusive range of characters between
a and b. In s, the metacharacters -, ], an initial ^, and the regular expression
delimiter must be preceded by a \; other metacharacters have no special meaning and
may appear unescaped.
A . matches any character.
A ^ matches the beginning of a line; $ matches the end of the line.
The *+? operators match zero or more (*), one or more (+), zero or one (?), instances
respectively of the preceding regular expression.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing
a match to the remainder of the regular expression.
**/
struct regex
{
regex();
regex(token rt,
bool literal = false,
bool star_match_newline = false,
bool icase = false);
void compile(token rt, bool literal, bool star_match_newline, bool icase);
///Match the whole string
token match( token bol, token* sub=0, uint nsub=0 ) const;
///Find occurrence of pattern
token find( token bol, token* sub=0, uint nsub=0 ) const;
///Match leading part
token leading( token bol, token* sub=0, uint nsub=0 ) const;
private:
regex_program* _prog;
};
COID_NAMESPACE_END
#include "token.h"
#endif //__COMM_REGEX__HEADER_FILE__