820 lines
25 KiB
C++
820 lines
25 KiB
C++
/* Copyright (C) 2004 Xavier Decoret <Xavier.Decoret@imag.fr>
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*
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* argsteam is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Foobar is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Foobar; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef ARGSTREAM_H
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#define ARGSTREAM_H
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#include <string>
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#include <list>
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#include <deque>
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#include <map>
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#include <stdexcept>
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#include <sstream>
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#include <iostream>
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namespace
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{
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class argstream;
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template<class T>
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class ValueHolder;
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template <typename T>
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argstream& operator>> (argstream&, const ValueHolder<T>&);
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Interface of ValueHolder<T>
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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template<class T>
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class ValueHolder
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{
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public:
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ValueHolder(char s,
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const char* l,
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T& b,
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const char* desc,
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bool mandatory);
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ValueHolder(const char* l,
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T& b,
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const char* desc,
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bool mandatory);
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ValueHolder(char s,
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T& b,
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const char* desc,
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bool mandatory);
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friend argstream& operator>><>(argstream& s,const ValueHolder<T>& v);
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std::string name() const;
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std::string description() const;
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private:
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std::string shortName_;
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std::string longName_;
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T* value_;
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T initialValue_;
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std::string description_;
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bool mandatory_;
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};
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template <class T>
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inline ValueHolder<T>
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parameter(char s,
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const char* l,
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T& b,
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const char* desc="",
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bool mandatory = true)
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{
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return ValueHolder<T>(s,l,b,desc,mandatory);
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}
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template <class T>
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inline ValueHolder<T>
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parameter(char s,
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T& b,
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const char* desc="",
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bool mandatory = true)
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{
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return ValueHolder<T>(s,b,desc,mandatory);
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}
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template <class T>
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inline ValueHolder<T>
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parameter(const char* l,
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T& b,
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const char* desc="",
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bool mandatory = true)
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{
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return ValueHolder<T>(l,b,desc,mandatory);
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}
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Interface of OptionHolder
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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class OptionHolder
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{
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public:
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inline OptionHolder(char s,
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const char* l,
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bool& b,
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const char* desc);
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inline OptionHolder(const char* l,
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bool& b,
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const char* desc);
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inline OptionHolder(char s,
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bool& b,
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const char* desc);
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friend argstream& operator>>(argstream& s,const OptionHolder& v);
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inline std::string name() const;
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inline std::string description() const;
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protected:
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inline OptionHolder(char s,
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const char* l,
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const char* desc);
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friend OptionHolder help(char s='h',
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const char* l="help",
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const char* desc="Display this help");
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private:
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std::string shortName_;
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std::string longName_;
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bool* value_;
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std::string description_;
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};
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inline OptionHolder
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option(char s,
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const char* l,
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bool& b,
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const char* desc="")
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{
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return OptionHolder(s,l,b,desc);
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}
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inline OptionHolder
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option(char s,
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bool& b,
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const char* desc="")
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{
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return OptionHolder(s,b,desc);
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}
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inline OptionHolder
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option(const char* l,
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bool& b,
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const char* desc="")
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{
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return OptionHolder(l,b,desc);
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}
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inline OptionHolder
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help(char s,
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const char* l,
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const char* desc)
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{
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return OptionHolder(s,l,desc);
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}
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template <class T, class O>
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class ValuesHolder;
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template <typename T, typename O>
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argstream& operator>> (argstream&, const ValuesHolder<T, O>&);
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Interface of ValuesHolder
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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template<class T,class O>
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class ValuesHolder
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{
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public:
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ValuesHolder(const O& o,
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const char* desc,
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int len);
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friend argstream& operator>><>(argstream& s,const ValuesHolder<T,O>& v);
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std::string name() const;
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std::string description() const;
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typedef T value_type;
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private:
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mutable O value_;
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std::string description_;
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int len_;
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char letter_;
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};
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template<class T,class O>
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inline ValuesHolder<T,O>
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values(const O& o,
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const char* desc="",
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int len=-1)
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{
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return ValuesHolder<T,O>(o,desc,len);
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}
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Interface of ValueParser
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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template <class T>
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class ValueParser
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{
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public:
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inline T operator()(const std::string& s) const
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{
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std::istringstream is(s);
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T t;
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is>>t;
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return t;
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}
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};
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// We need to specialize for string otherwise parsing of a value that
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// contains space (for example a string with space passed in quotes on the
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// command line) would parse only the first element of the value!!!
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template <>
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class ValueParser<std::string>
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{
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public:
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inline std::string operator()(const std::string& s) const
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{
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return s;
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}
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};
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Interface of argstream
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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class argstream
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{
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public:
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inline argstream(int argc,char** argv);
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//inline argstream(const char* c);
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template<class T>
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friend argstream& operator>>(argstream& s,const ValueHolder<T>& v);
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friend inline argstream& operator>>(argstream& s,const OptionHolder& v);
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template<class T,class O>
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friend argstream& operator>>(argstream& s,const ValuesHolder<T,O>& v);
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inline bool helpRequested() const;
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inline bool isOk() const;
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inline std::string errorLog() const;
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inline std::string usage() const;
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inline void defaultErrorHandling(bool ignoreUnused=false) const;
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static inline char uniqueLetter();
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protected:
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void parse(int argc,char** argv);
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private:
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typedef std::list<std::string>::iterator value_iterator;
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typedef std::pair<std::string,std::string> help_entry;
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std::string progName_;
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std::map<std::string,value_iterator> options_;
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std::list<std::string> values_;
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bool minusActive_;
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bool isOk_;
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std::deque<help_entry> argHelps_;
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std::string cmdLine_;
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std::deque<std::string> errors_;
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bool helpRequested_;
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};
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//************************************************************
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// Implementation of ValueHolder<T>
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//************************************************************
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template<class T>
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ValueHolder<T>::ValueHolder(char s,
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const char* l,
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T& v,
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const char* desc,
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bool mandatory)
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: shortName_(1,s),
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longName_(l),
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value_(&v),
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initialValue_(v),
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description_(desc),
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mandatory_(mandatory)
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{
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}
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template<class T>
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ValueHolder<T>::ValueHolder(const char* l,
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T& v,
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const char* desc,
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bool mandatory)
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: longName_(l),
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value_(&v),
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initialValue_(v),
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description_(desc),
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mandatory_(mandatory)
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{
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}
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template<class T>
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ValueHolder<T>::ValueHolder(char s,
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T& v,
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const char* desc,
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bool mandatory)
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: shortName_(1,s),
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value_(&v),
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initialValue_(v),
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description_(desc),
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mandatory_(mandatory)
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{
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}
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template<class T>
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std::string
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ValueHolder<T>::name() const
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{
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std::ostringstream os;
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if (!shortName_.empty()) os<<'-'<<shortName_;
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if (!longName_.empty()) {
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if (!shortName_.empty()) os<<'/';
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os<<"--"<<longName_;
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}
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return os.str();
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}
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template<class T>
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std::string
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ValueHolder<T>::description() const
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{
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std::ostringstream os;
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os<<description_;
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if (mandatory_)
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{
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os<<"(mandatory)";
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}
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else
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{
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os<<"(default="<<initialValue_<<")";
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}
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return os.str();
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}
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//************************************************************
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// Implementation of OptionHolder
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//************************************************************
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inline OptionHolder::OptionHolder(char s,
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const char* l,
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bool& b,
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const char* desc)
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: shortName_(1,s),
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longName_(l),
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value_(&b),
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description_(desc)
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{
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}
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inline OptionHolder::OptionHolder(const char* l,
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bool& b,
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const char* desc)
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: longName_(l),
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value_(&b),
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description_(desc)
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{
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}
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inline OptionHolder::OptionHolder(char s,
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bool& b,
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const char* desc)
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: shortName_(1,s),
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value_(&b),
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description_(desc)
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{
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}
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inline OptionHolder::OptionHolder(char s,
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const char* l,
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const char* desc)
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: shortName_(1,s),
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longName_(l),
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value_(NULL),
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description_(desc)
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{
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}
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inline std::string
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OptionHolder::name() const
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{
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std::ostringstream os;
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if (!shortName_.empty()) os<<'-'<<shortName_;
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if (!longName_.empty())
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{
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if (!shortName_.empty()) os<<'/';
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os<<"--"<<longName_;
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}
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return os.str();
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}
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inline std::string
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OptionHolder::description() const
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{
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return description_;
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}
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//************************************************************
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// Implementation of ValuesHolder<T,O>
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//************************************************************
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template<class T,class O>
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ValuesHolder<T,O>::ValuesHolder(const O& o,
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const char* desc,
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int len)
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: value_(o),
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description_(desc),
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len_(len)
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{
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letter_ = argstream::uniqueLetter();
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}
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template <class T,class O>
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std::string
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ValuesHolder<T,O>::name() const
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{
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std::ostringstream os;
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os<<letter_<<"i";
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return os.str();
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}
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template <class T,class O>
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std::string
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ValuesHolder<T,O>::description() const
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{
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return description_;
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}
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//************************************************************
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// Implementation of argstream
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//************************************************************
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inline
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argstream::argstream(int argc,char** argv)
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: progName_(argv[0]),
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minusActive_(true),
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isOk_(true)
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{
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parse(argc,argv);
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}
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//inline
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// argstream::argstream(const char* c)
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// : progName_(""),
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// minusActive_(true),
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// isOk_(true)
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//{
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// std::string s(c);
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// // Build argc, argv from s. We must add a dummy first element for
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// // progName because parse() expects it!!
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// std::deque<std::string> args;
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// args.push_back("");
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// std::istringstream is(s);
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// while (is.good())
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// {
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// std::string t;
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// is>>t;
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// args.push_back(t);
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// }
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// char* pargs[args.size()];
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// char** p = pargs;
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// for (std::deque<std::string>::const_iterator
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// iter = args.begin();
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// iter != args.end();++iter)
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// {
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// *p++ = const_cast<char*>(iter->c_str());
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// }
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// parse(args.size(),pargs);
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//}
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inline void
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argstream::parse(int argc,char** argv)
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{
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// Run thru all arguments.
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// * it has -- in front : it is a long name option, if remainder is empty,
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// it is an error
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// * it has - in front : it is a sequence of short name options, if
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// remainder is empty, deactivates option (- will
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// now be considered a char).
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// * if any other char, or if option was deactivated
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// : it is a value. Values are split in parameters
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// (immediately follow an option) and pure values.
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// Each time a value is parsed, if the previously parsed argument was an
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// option, then the option is linked to the value in case of it is a
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// option with parameter. The subtle point is that when several options
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// are given with short names (ex: -abc equivalent to -a -b -c), the last
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// parsed option is -c).
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// Since we use map for option, any successive call overides the previous
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// one: foo -a -b -a hello is equivalent to foo -b -a hello
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// For values it is not true since we might have several times the same
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// value.
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value_iterator* lastOption = NULL;
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for (char** a = argv,**astop=a+argc;++a!=astop;)
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{
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std::string s(*a);
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if (minusActive_ && s[0] == '-')
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{
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if (s.size() > 1 && s[1] == '-')
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{
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if (s.size() == 2)
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{
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minusActive_ = false;
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continue;
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}
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lastOption = &(options_[s.substr(2)] = values_.end());
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}
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else
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{
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if (s.size() > 1)
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{
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// Parse all chars, if it is a minus we have an error
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for (std::string::const_iterator cter = s.begin();
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++cter != s.end();)
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{
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if (*cter == '-')
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{
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isOk_ = false;
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std::ostringstream os;
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os<<"- in the middle of a switch "<<a;
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errors_.push_back(os.str());
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break;
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}
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lastOption = &(options_[std::string(1,*cter)] = values_.end());
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}
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}
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else
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{
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isOk_ = false;
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errors_.push_back("Invalid argument -");
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break;
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}
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}
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}
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else
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{
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values_.push_back(s);
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if (lastOption != NULL)
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{
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*lastOption = --values_.end();
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}
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lastOption = NULL;
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}
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}
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#ifdef ARGSTREAM_DEBUG
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for (std::map<std::string,value_iterator>::const_iterator
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iter = options_.begin();iter != options_.end();++iter)
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{
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std::cout<<"DEBUG: option "<<iter->first;
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if (iter->second != values_.end())
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{
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std::cout<<" -> "<<*(iter->second);
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}
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std::cout<<std::endl;
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}
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for (std::list<std::string>::const_iterator
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iter = values_.begin();iter != values_.end();++iter)
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{
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std::cout<<"DEBUG: value "<<*iter<<std::endl;
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}
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#endif // ARGSTREAM_DEBUG
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}
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inline bool
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argstream::isOk() const
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{
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return isOk_;
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}
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inline bool
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argstream::helpRequested() const
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{
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return helpRequested_;
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}
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inline std::string
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argstream::usage() const
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{
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std::ostringstream os;
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os<<"usage: "<<progName_<<cmdLine_<<'\n';
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unsigned int lmax = 0;
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for (std::deque<help_entry>::const_iterator
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iter = argHelps_.begin();iter != argHelps_.end();++iter)
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{
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if (lmax<iter->first.size()) lmax = iter->first.size();
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}
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for (std::deque<help_entry>::const_iterator
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iter = argHelps_.begin();iter != argHelps_.end();++iter)
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{
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os<<'\t'<<iter->first<<std::string(lmax-iter->first.size(),' ')
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<<" : "<<iter->second<<'\n';
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}
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return os.str();
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}
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inline std::string
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argstream::errorLog() const
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{
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std::string s;
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for(std::deque<std::string>::const_iterator iter = errors_.begin();
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iter != errors_.end();++iter)
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{
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s += *iter;
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s += '\n';
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}
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return s;
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}
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inline char
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argstream::uniqueLetter()
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{
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static unsigned int c = 'a';
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return c++;
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}
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template<class T>
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argstream&
|
|
operator>>(argstream& s,const ValueHolder<T>& v)
|
|
{
|
|
// Search in the options if there is any such option defined either with a
|
|
// short name or a long name. If both are found, only the last one is
|
|
// used.
|
|
#ifdef ARGSTREAM_DEBUG
|
|
std::cout<<"DEBUG: searching "<<v.shortName_<<" "<<v.longName_<<std::endl;
|
|
#endif
|
|
s.argHelps_.push_back(argstream::help_entry(v.name(),v.description()));
|
|
if (v.mandatory_)
|
|
{
|
|
if (!v.shortName_.empty())
|
|
{
|
|
s.cmdLine_ += " -";
|
|
s.cmdLine_ += v.shortName_;
|
|
}
|
|
else
|
|
{
|
|
s.cmdLine_ += " --";
|
|
s.cmdLine_ += v.longName_;
|
|
}
|
|
s.cmdLine_ += " value";
|
|
}
|
|
else
|
|
{
|
|
if (!v.shortName_.empty())
|
|
{
|
|
s.cmdLine_ += " [-";
|
|
s.cmdLine_ += v.shortName_;
|
|
}
|
|
else
|
|
{
|
|
s.cmdLine_ += " [--";
|
|
s.cmdLine_ += v.longName_;
|
|
}
|
|
s.cmdLine_ += " value]";
|
|
|
|
}
|
|
std::map<std::string,argstream::value_iterator>::iterator iter =
|
|
s.options_.find(v.shortName_);
|
|
if (iter == s.options_.end())
|
|
{
|
|
iter = s.options_.find(v.longName_);
|
|
}
|
|
if (iter != s.options_.end())
|
|
{
|
|
// If we find counterpart for value holder on command line, either it
|
|
// has an associated value in which case we assign it, or it has not, in
|
|
// which case we have an error.
|
|
if (iter->second != s.values_.end())
|
|
{
|
|
#ifdef ARGSTREAM_DEBUG
|
|
std::cout<<"DEBUG: found value "<<*(iter->second)<<std::endl;
|
|
#endif
|
|
ValueParser<T> p;
|
|
*(v.value_) = p(*(iter->second));
|
|
// The option and its associated value are removed, the subtle thing
|
|
// is that someother options might have this associated value too,
|
|
// which we must invalidate.
|
|
s.values_.erase(iter->second);
|
|
|
|
// FIXME this loop seems to crash if a std::string is used as the value
|
|
//for (std::map<std::string,argstream::value_iterator>::iterator
|
|
// jter = s.options_.begin();jter != s.options_.end();++jter)
|
|
//{
|
|
// if (jter->second == iter->second)
|
|
// {
|
|
// jter->second = s.values_.end();
|
|
// }
|
|
//}
|
|
s.options_.erase(iter);
|
|
}
|
|
else
|
|
{
|
|
s.isOk_ = false;
|
|
std::ostringstream os;
|
|
os<<"No value following switch "<<iter->first
|
|
<<" on command line";
|
|
s.errors_.push_back(os.str());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (v.mandatory_)
|
|
{
|
|
s.isOk_ = false;
|
|
std::ostringstream os;
|
|
os<<"Mandatory parameter ";
|
|
if (!v.shortName_.empty()) os<<'-'<<v.shortName_;
|
|
if (!v.longName_.empty())
|
|
{
|
|
if (!v.shortName_.empty()) os<<'/';
|
|
os<<"--"<<v.longName_;
|
|
}
|
|
os<<" missing";
|
|
s.errors_.push_back(os.str());
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
inline argstream&
|
|
operator>>(argstream& s,const OptionHolder& v)
|
|
{
|
|
// Search in the options if there is any such option defined either with a
|
|
// short name or a long name. If both are found, only the last one is
|
|
// used.
|
|
#ifdef ARGSTREAM_DEBUG
|
|
std::cout<<"DEBUG: searching "<<v.shortName_<<" "<<v.longName_<<std::endl;
|
|
#endif
|
|
s.argHelps_.push_back(argstream::help_entry(v.name(),v.description()));
|
|
{
|
|
std::string c;
|
|
if (!v.shortName_.empty())
|
|
{
|
|
c += " [-";
|
|
c += v.shortName_;
|
|
}
|
|
else
|
|
{
|
|
c += " [--";
|
|
c += v.longName_;
|
|
}
|
|
c += "]";
|
|
s.cmdLine_ = c+s.cmdLine_;
|
|
}
|
|
std::map<std::string,argstream::value_iterator>::iterator iter =
|
|
s.options_.find(v.shortName_);
|
|
if (iter == s.options_.end())
|
|
{
|
|
iter = s.options_.find(v.longName_);
|
|
}
|
|
if (iter != s.options_.end())
|
|
{
|
|
// If we find counterpart for value holder on command line then the
|
|
// option is true and if an associated value was found, it is ignored
|
|
if (v.value_ != NULL)
|
|
{
|
|
*(v.value_) = true;
|
|
}
|
|
else
|
|
{
|
|
s.helpRequested_ = true;
|
|
}
|
|
// The option only is removed
|
|
s.options_.erase(iter);
|
|
}
|
|
else
|
|
{
|
|
if (v.value_ != NULL)
|
|
{
|
|
*(v.value_) = false;
|
|
}
|
|
else
|
|
{
|
|
s.helpRequested_ = false;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
template<class T,class O>
|
|
argstream&
|
|
operator>>(argstream& s,const ValuesHolder<T,O>& v)
|
|
{
|
|
s.argHelps_.push_back(argstream::help_entry(v.name(),v.description()));
|
|
{
|
|
std::ostringstream os;
|
|
os<<' '<<v.letter_<<'1';
|
|
switch (v.len_)
|
|
{
|
|
case -1:
|
|
os<<"...";
|
|
break;
|
|
case 1:
|
|
break;
|
|
default:
|
|
os<<"..."<<v.letter_<<v.len_;
|
|
break;
|
|
}
|
|
s.cmdLine_ += os.str();
|
|
}
|
|
std::list<std::string>::iterator first = s.values_.begin();
|
|
// We add to the iterator as much values as we can, limited to the length
|
|
// specified (if different of -1)
|
|
int n = v.len_ != -1?v.len_:s.values_.size();
|
|
while (first != s.values_.end() && n-->0)
|
|
{
|
|
// Read the value from the string *first
|
|
ValueParser<T> p;
|
|
*(v.value_++) = p(*first );
|
|
s.argHelps_.push_back(argstream::help_entry(v.name(),v.description()));
|
|
// The value we just removed was maybe "remembered" by an option so we
|
|
// remove it now.
|
|
for (std::map<std::string,argstream::value_iterator>::iterator
|
|
jter = s.options_.begin();jter != s.options_.end();++jter)
|
|
{
|
|
if (jter->second == first)
|
|
{
|
|
jter->second = s.values_.end();
|
|
}
|
|
}
|
|
++first;
|
|
}
|
|
// Check if we have enough values
|
|
if (n != 0)
|
|
{
|
|
s.isOk_ = false;
|
|
std::ostringstream os;
|
|
os<<"Expecting "<<v.len_<<" values";
|
|
s.errors_.push_back(os.str());
|
|
}
|
|
// Erase the values parsed
|
|
s.values_.erase(s.values_.begin(),first);
|
|
return s;
|
|
}
|
|
inline void
|
|
argstream::defaultErrorHandling(bool ignoreUnused) const
|
|
{
|
|
if (helpRequested_)
|
|
{
|
|
std::cout<<usage();
|
|
exit(1);
|
|
}
|
|
if (!isOk_)
|
|
{
|
|
std::cerr<<errorLog();
|
|
exit(1);
|
|
}
|
|
if (!ignoreUnused &&
|
|
(!values_.empty() || !options_.empty()))
|
|
{
|
|
std::cerr<<"Unused arguments"<<std::endl;
|
|
exit(1);
|
|
}
|
|
}
|
|
};
|
|
#endif // ARGSTREAM_H
|
|
|