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/*************************************************************************
** CmdLineParserBase.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2014 Martin Gieseking <martin.gieseking@uos.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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef DVISVGM_CMDLINEPARSERBASE_H
#define DVISVGM_CMDLINEPARSERBASE_H
#include <string>
#include <vector>
class InputReader;
class CmdLineParserBase
{
protected:
struct Option;
struct OptionHandler {
virtual ~OptionHandler () {}
virtual void operator () (CmdLineParserBase *obj, InputReader &ir, const Option &opt, bool longopt) const=0;
};
template <typename T>
class OptionHandlerImpl : public OptionHandler {
protected:
typedef void (T::*LocalHandler)(InputReader &ir, const Option &opt, bool longopt);
public:
OptionHandlerImpl (LocalHandler handler) : _handler(handler) {}
void operator () (CmdLineParserBase *obj, InputReader &ir, const Option &opt, bool longopt) const {
if (T *tobj = dynamic_cast<T*>(obj))
(tobj->*_handler)(ir, opt, longopt);
}
private:
LocalHandler _handler;
};
enum ArgMode {ARG_NONE, ARG_OPTIONAL, ARG_REQUIRED};
struct Option {
~Option () {delete handler;}
char shortname;
const char *longname;
ArgMode argmode; // mode of option argument
const OptionHandler *handler;
};
public:
virtual void parse (int argc, char **argv, bool printErrors=true);
virtual void help (int mode=0) const;
virtual int numFiles () const {return _files.size();}
virtual const char* file (size_t n) {return n < _files.size() ? _files[n].c_str() : 0;}
// virtual void status () const;
virtual bool error () const {return _error;}
protected:
CmdLineParserBase () : _printErrors(true), _error(false) {}
CmdLineParserBase (const CmdLineParserBase &cmd) : _printErrors(true), _error(false) {}
virtual ~CmdLineParserBase () {}
virtual void init ();
virtual void error (const Option &opt, bool longopt, const char *msg) const;
virtual const Option* options (size_t *numopts) const =0;
virtual const char** helplines (size_t *numlines) const =0;
bool checkArgPrefix (InputReader &ir, const Option &opt, bool longopt) const;
bool checkNoArg (InputReader &ir, const Option &opt, bool longopt) const;
bool getIntArg (InputReader &ir, const Option &opt, bool longopt, int &arg) const;
bool getUIntArg (InputReader &ir, const Option &opt, bool longopt, unsigned &arg) const;
bool getDoubleArg (InputReader &ir, const Option &opt, bool longopt, double &arg) const;
bool getStringArg (InputReader &ir, const Option &opt, bool longopt, std::string &arg) const;
bool getBoolArg (InputReader &ir, const Option &opt, bool longopt, bool &arg) const;
bool getCharArg (InputReader &ir, const Option &opt, bool longopt, char &arg) const;
const Option* option (char shortname) const;
const Option* option (const std::string &longname) const;
private:
bool _printErrors; ///< if true, print error messages
mutable bool _error; ///< error occured while parsing options
std::vector<std::string> _files; ///< filename parameters
};
#endif
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