75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
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#ifndef _TREXPP_H_
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#define _TREXPP_H_
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/***************************************************************
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T-Rex a tiny regular expression library
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Copyright (C) 2003-2004 Alberto Demichelis
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This software is provided 'as-is', without any express
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or implied warranty. In no event will the authors be held
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liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for
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any purpose, including commercial applications, and to alter
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it and redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented;
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you must not claim that you wrote the original software.
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If you use this software in a product, an acknowledgment
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in the product documentation would be appreciated but
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is not required.
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2. Altered source versions must be plainly marked as such,
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and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any
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source distribution.
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****************************************************************/
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extern "C" {
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#include "trex.h"
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}
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struct TRexParseException{TRexParseException(const TRexChar *c):desc(c){}const TRexChar *desc;};
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class TRexpp {
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public:
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TRexpp() { _exp = (TRex *)0; }
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~TRexpp() { CleanUp(); }
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// compiles a regular expression
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void Compile(const TRexChar *pattern) {
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const TRexChar *error;
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CleanUp();
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if(!(_exp = trex_compile(pattern,&error)))
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throw TRexParseException(error);
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}
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// return true if the given text match the expression
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bool Match(const TRexChar* text) {
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return _exp?(trex_match(_exp,text) != 0):false;
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}
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// Searches for the first match of the expression in a zero terminated string
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bool Search(const TRexChar* text, const TRexChar** out_begin, const TRexChar** out_end) {
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return _exp?(trex_search(_exp,text,out_begin,out_end) != 0):false;
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}
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// Searches for the first match of the expression in a string sarting at text_begin and ending at text_end
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bool SearchRange(const TRexChar* text_begin,const TRexChar* text_end,const TRexChar** out_begin, const TRexChar** out_end) {
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return _exp?(trex_searchrange(_exp,text_begin,text_end,out_begin,out_end) != 0):false;
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}
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bool GetSubExp(int n, const TRexChar** out_begin, int *out_len)
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{
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TRexMatch match;
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TRexBool res = _exp?(trex_getsubexp(_exp,n,&match)):TRex_False;
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if(res) {
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*out_begin = match.begin;
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*out_len = match.len;
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return true;
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}
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return false;
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}
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int GetSubExpCount() { return _exp?trex_getsubexpcount(_exp):0; }
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private:
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void CleanUp() { if(_exp) trex_free(_exp); _exp = (TRex *)0; }
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TRex *_exp;
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};
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#endif //_TREXPP_H_
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