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/*GPL*START*
*
* encapsulated POSIX regular expression (regex) interface header
*
* Copyright (C) 1998 by Johannes Overmann <Johannes.Overmann@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* *GPL*END*/
#ifndef _ngw_tregex_h_
#define _ngw_tregex_h_
#include <sys/types.h>
#include <regex.h>
#include "tstring.h"
class TRegEx {
public:
// ctor & dtor
// cflags: REG_EXTENDED, REG_ICASE, REG_NOSUB, REG_NEWLINE
TRegEx(const char *regex, int cflags);
~TRegEx();
// matching:
// eflags: REG_NOTBOL, REG_NOTEOL
// return true if str matches the regex
bool match(const char *str, int eflags=0) const;
// return true if str matches the regex and set position
bool firstMatch(const char *str, int& start, int& len, int eflags=0) const;
// return true if str matches the regex and return all positions
// in all: all[0]=start1, all[1]=len1, all[2]=start2, all[3]=len2, ...
bool allMatches(const char *str, tvector<int>& all, int eflags=0) const;
// same as above but also recognize substrings in all
bool allMatchesSubstring(const char *str, tvector<tvector<int> >& all,
int eflags=0, int progress=0, int progmode=0) const;
// constants for allMatchesSubstring(..., progmode)
// default: print '.' to stdout
// P_STDERR: print to stderr
// P_NUMBER: print number instead of a '.'
enum {P_STDERR=1, P_NUMBER=2};
// error exceptions
class TErroneousRegexException: public TException {
TExceptionN(TErroneousRegexException);
TErroneousRegexException(int error_, const regex_t& preg_): error(error_), preg(preg_) {}
const char *str() const {
static char buf[256];
regerror(error, &preg, buf, sizeof(buf));
return buf;
}
int error;
regex_t preg;
TExceptionM2("%s (error #%d)", str(), error);
};
class TNoSubRegexException: public TException {TExceptionN(TErroneousRegexException);};
private:
// private data
regex_t preg;
bool nosub;
// forbid default copy and assignment
TRegEx(const TRegEx&);
const TRegEx& operator=(const TRegEx&);
};
// substitute occurences occ in string with sub and write to out
// and use back references in sub from occ (\0 .. \9 \a .. \z)
void parameterSubstitution(const tstring& in, tstring& out, const tstring& sub,
const tvector<tvector<int> >& occ,
bool preserve_case=false, int modify_case=0,
int progress=0, const tstring& pre_padstring=tstring(),
const tstring& post_padstring=tstring(), tvector<int> *match_pos=0);
#endif /* tregex.h */
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