608 lines
17 KiB
C++
608 lines
17 KiB
C++
/* -*- mode: c++ ; coding: utf-8-unix -*- */
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/* last updated : 2015/05/23.23:17:32 */
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/*
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* Copyright (c) 2013-2015 yaruopooner [https://github.com/yaruopooner]
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*
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* This file is part of ac-clang.
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef __COMMAND_LINE_HPP__
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#define __COMMAND_LINE_HPP__
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/*================================================================================================*/
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/* Include Files */
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/*================================================================================================*/
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#include <string>
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#include <vector>
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#include <set>
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#include <memory>
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#include <iostream>
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#include <sstream>
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/*================================================================================================*/
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/* Class */
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/*================================================================================================*/
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namespace CommandLine
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{
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template< typename Target, typename Source >
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struct lexical_cast_imp
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{
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static Target cast( const Source& value )
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{
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Target result;
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std::stringstream interpreter;
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if ( !( interpreter << value ) || !( interpreter >> result ) || !( interpreter >> std::ws ).eof() )
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{
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throw std::invalid_argument( "value cast failure." );
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}
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return result;
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}
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};
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template< typename Source >
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struct lexical_cast_imp< Source, Source >
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{
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static Source cast( const Source& value )
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{
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return value;
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}
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};
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template< typename Target, typename Source >
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static Target lexical_cast( const Source& value )
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{
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return lexical_cast_imp< Target, Source >::cast( value );
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}
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template< typename T >
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struct DefaultReader
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{
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virtual ~DefaultReader( void )
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{
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}
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virtual T operator ()( const std::string& argument ) const
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{
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return lexical_cast< T >( argument );
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}
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};
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template< typename T >
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class RangeReader : public DefaultReader< T >
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{
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public:
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RangeReader( T min, T max ) :
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m_Min( min )
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, m_Max( max )
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{
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}
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virtual T operator ()( const std::string& argument ) const override
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{
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const T value = lexical_cast< T >( argument );
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if ( ( value < m_Min ) || ( m_Max < value ) )
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{
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throw std::domain_error( "value is out of range : " + argument );
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}
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return value;
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}
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T m_Min;
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T m_Max;
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};
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class IOptionWithValue;
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template< typename T, typename Reader >
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class OptionWithValueWithReader;
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class IOptionDetail
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{
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protected:
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virtual ~IOptionDetail()
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{
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}
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public:
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enum Flag
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{
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kFlag_Once = 1 << 0,
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kFlag_HasValue = 1 << 1,
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kFlag_RequireValue = 1 << 2,
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};
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virtual int32_t GetId( void ) const = 0;
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virtual const std::string& GetName( void ) const = 0;
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virtual const std::string& GetShortName( void ) const = 0;
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virtual const std::string& GetDescription( void ) const = 0;
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virtual bool HasFlag( uint32_t flag ) const = 0;
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virtual const std::string& GetValueDescription( void ) const = 0;
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virtual bool IsSameName( const std::string& name ) const = 0;
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virtual std::shared_ptr< IOptionWithValue > CreateEvaluator( const std::string& argument ) const = 0;
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};
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template< typename T, typename Reader = DefaultReader< T > >
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class OptionDetail : public IOptionDetail
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{
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public:
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OptionDetail( int32_t id, const std::string& name, const std::string& shortName, const std::string& description, uint32_t flags = 0, const std::string& valueDescription = std::string(), const Reader& reader = Reader() ) :
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m_Id( id )
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, m_Name( "--" + name )
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, m_ShortName( "-" + shortName )
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, m_Description( description )
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, m_Flags( flags )
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, m_ValueDescription( valueDescription )
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, m_Reader( reader )
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{
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}
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virtual ~OptionDetail()
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{
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}
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int32_t GetId( void ) const final
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{
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return m_Id;
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}
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const std::string& GetName( void ) const final
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{
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return m_Name;
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}
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const std::string& GetShortName( void ) const final
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{
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return m_ShortName;
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}
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const std::string& GetDescription( void ) const final
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{
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return m_Description;
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}
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bool HasFlag( uint32_t flag ) const final
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{
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return ( m_Flags & flag ) ? true : false;
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}
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const std::string& GetValueDescription( void ) const final
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{
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return m_ValueDescription;
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}
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bool IsSameName( const std::string& name ) const final
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{
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return ( ( m_Name == name ) || ( m_ShortName == name ) );
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}
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std::shared_ptr< IOptionWithValue > CreateEvaluator( const std::string& argument ) const override
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{
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return std::make_shared< OptionWithValueWithReader< T, Reader > >( this, argument );
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}
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T GetValue( const std::string& argument ) const
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{
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return m_Reader( argument );
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}
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protected:
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const int32_t m_Id;
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const std::string m_Name;
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const std::string m_ShortName;
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const std::string m_Description;
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const uint32_t m_Flags;
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const std::string m_ValueDescription;
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const Reader m_Reader;
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};
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class IOptionWithValue
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{
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protected:
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virtual ~IOptionWithValue( void )
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{
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}
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public:
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virtual const IOptionDetail* GetDetail( void ) const = 0;
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virtual uint32_t GetId( void ) const = 0;
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virtual const std::string& GetOptionName( void ) const = 0;
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virtual bool IsValid( void ) const = 0;
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virtual bool Evaluate( std::string& message ) = 0;
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};
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template< typename T >
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class OptionWithValue : public IOptionWithValue
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{
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protected:
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OptionWithValue( const IOptionDetail* detail, const std::string& argument ) :
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m_Detail( detail )
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, m_Argument( argument )
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, m_ValidValue( false )
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{
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}
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public:
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virtual ~OptionWithValue( void )
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{
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}
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const IOptionDetail* GetDetail( void ) const final
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{
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return m_Detail;
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}
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uint32_t GetId( void ) const final
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{
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return m_Detail->GetId();
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}
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const std::string& GetOptionName( void ) const final
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{
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return m_Detail->GetName();
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}
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bool IsValid( void ) const final
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{
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return m_ValidValue;
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}
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virtual bool Evaluate( std::string& message ) override
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{
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return true;
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}
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const T& GetValue( void ) const
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{
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return m_Value;
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}
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protected:
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const IOptionDetail* m_Detail;
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const std::string m_Argument;
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bool m_ValidValue;
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T m_Value;
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};
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template< typename T, typename Reader >
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class OptionWithValueWithReader : public OptionWithValue< T >
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{
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public:
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OptionWithValueWithReader( const IOptionDetail* detail, const std::string& argument ) :
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OptionWithValue< T >( detail, argument )
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{
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}
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virtual ~OptionWithValueWithReader( void )
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{
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}
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bool Evaluate( std::string& message ) override
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{
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try
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{
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if ( !this->m_Argument.empty() )
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{
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const auto* detail = dynamic_cast< const OptionDetail< T, Reader >* >( this->m_Detail );
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this->m_Value = detail->GetValue( this->m_Argument );
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this->m_ValidValue = true;
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}
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return true;
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}
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catch ( const std::exception& exception )
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{
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std::stringstream ss;
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ss << this->m_Detail->GetName() << " : " << exception.what() << std::endl;
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ss << this->m_Detail->GetDescription();
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message = ss.str();
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return false;
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}
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}
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};
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typedef std::vector< std::shared_ptr< IOptionDetail > > OptionDetailArray;
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typedef std::vector< std::shared_ptr< IOptionWithValue > > OptionWithValueArray;
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class Parser
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{
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public:
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void AddOption( int32_t id, const std::string& name, const std::string& shortName, const std::string& description, uint32_t flags = 0, const std::string& valueDescription = std::string() )
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{
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m_Details.push_back( std::make_shared< OptionDetail< std::string > >( id, name, shortName, description, flags, valueDescription ) );
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}
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template< typename T, typename Reader = DefaultReader< T > >
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void AddOption( int32_t id, const std::string& name, const std::string& shortName, const std::string& description, uint32_t flags = 0, const std::string& valueDescription = std::string(), const Reader& reader = Reader() )
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{
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m_Details.push_back( std::make_shared< OptionDetail< T, Reader > >( id, name, shortName, description, flags, valueDescription, reader ) );
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}
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size_t GetNumberOfOptionValues( void ) const
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{
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return m_OptionValues.size();
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}
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size_t GetNumberOfArguments( void ) const
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{
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return m_Arguments.size();
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}
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static const std::string& GetOptionName( const IOptionWithValue* value )
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{
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return value->GetDetail()->GetName();
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}
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template< typename T >
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static const T& GetValue( const std::shared_ptr< IOptionWithValue >& value )
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{
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const auto* casted_value = dynamic_cast< const OptionWithValue< T >* >( value.get() );
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return casted_value->GetValue();
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}
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const OptionDetailArray& GetOptionDetailArray( void ) const
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{
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return m_Details;
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}
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const OptionWithValueArray& GetOptionWithValueArray( void ) const
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{
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return m_OptionValues;
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}
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bool Parse( int argc, char* argv[] )
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{
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// clear & store
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m_Arguments.clear();
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for ( int i = 1; i < argc; ++i )
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{
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m_Arguments.push_back( argv[ i ] );
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}
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// parse
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const size_t n_args = m_Arguments.size();
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for ( size_t i = 0; i < n_args; ++i )
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{
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const std::string& option_name = m_Arguments[ i ];
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if ( !HasOptionPrefix( option_name ) )
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{
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// error, argument is not option format
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// ignore
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m_Errors.push_back( "option syntax error : argument is not option format : " + option_name );
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continue;
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}
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bool is_match = false;
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bool is_valid_format = false;
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std::string value;
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for ( const auto detail : m_Details )
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{
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if ( !detail->IsSameName( option_name ) )
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{
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continue;
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}
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is_match = true;
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// found
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if ( detail->HasFlag( IOptionDetail::kFlag_HasValue ) )
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{
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const size_t next_i = i + 1;
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if ( detail->HasFlag( IOptionDetail::kFlag_RequireValue ) )
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{
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if ( n_args <= next_i )
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{
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// error, argument locator over
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m_Errors.push_back( "option syntax error : not enough argument : " + option_name );
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break;
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}
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const std::string& next_value = m_Arguments[ next_i ];
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if ( HasOptionPrefix( next_value ) )
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{
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// option have not value
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m_Errors.push_back( "option syntax error : value not found : " + option_name );
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break;
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}
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value = m_Arguments[ next_i ];
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i = next_i;
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}
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else
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{
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if ( next_i < n_args )
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{
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const std::string& next_value = m_Arguments[ next_i ];
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if ( !HasOptionPrefix( next_value ) )
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{
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// option have not value
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value = m_Arguments[ next_i ];
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i = next_i;
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}
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}
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else
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{
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// not value, option only
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}
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}
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}
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// store found detal & value
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m_OptionValues.push_back( detail->CreateEvaluator( value ) );
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is_valid_format = true;
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break;
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}
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if ( !is_match )
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{
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// unknown option
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m_Warnings.push_back( "unknown option : " + option_name );
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// value check
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const size_t next_i = i + 1;
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if ( next_i < n_args )
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{
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const std::string& next_value = m_Arguments[ next_i ];
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if ( !HasOptionPrefix( next_value ) )
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{
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// discard unknown option value
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i = next_i;
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}
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}
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}
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else if ( !is_valid_format )
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{
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// illegal option format
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m_Errors.push_back( "option syntax error : illegal option format : " + option_name );
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}
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}
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std::set< const IOptionDetail* > used_options;
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for ( auto& option_value : m_OptionValues )
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{
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const IOptionDetail* detal = option_value->GetDetail();
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const bool found = ( used_options.find( detal ) != used_options.end() );
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if ( !found )
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{
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// first use
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used_options.insert( detal );
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}
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if ( found && detal->HasFlag( IOptionDetail::kFlag_Once ) )
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{
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// duplicate use
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m_Errors.push_back( "option syntax error : duplicate use : " + detal->GetName() );
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continue;
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}
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std::string message;
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if ( !option_value->Evaluate( message ) )
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{
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m_Errors.push_back( message );
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// bad value
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}
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}
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return ( m_Errors.size() == 0 );
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}
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void PrintUsage( const std::string& format ) const
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{
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std::cout << "Usage: " << format <<std::endl;
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std::cout << std::endl;
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std::cout << "OPTIONS:" << std::endl;
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for ( const auto& detail : m_Details )
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{
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std::cout << " " << detail->GetName();
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if ( !detail->GetShortName().empty() )
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{
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std::cout << ", " << detail->GetShortName();
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}
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if ( !detail->GetValueDescription().empty() )
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{
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std::cout << " <" << detail->GetValueDescription() << ">";
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}
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std::cout << std::endl;
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std::cout << " " << detail->GetDescription() << std::endl;
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}
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}
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void PrintErrors( void ) const
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{
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if ( !m_Errors.empty() )
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{
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std::cout << "Error:" << std::endl;
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for ( const auto& error : m_Errors )
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{
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std::cout << error << std::endl;
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}
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}
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}
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void PrintWarnings( void ) const
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{
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if ( !m_Warnings.empty() )
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{
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std::cout << "Warning:" << std::endl;
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for ( const auto& warning : m_Warnings )
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{
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std::cout << warning << std::endl;
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}
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}
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}
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private:
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static bool HasOptionPrefix( const std::string& name )
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{
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return ( ( name.compare( 0, 2, "--" ) == 0 ) || ( name.compare( 0, 1, "-" ) == 0 ) );
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}
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private:
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OptionDetailArray m_Details;
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std::vector< std::string > m_Arguments;
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std::vector< std::string > m_Errors;
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std::vector< std::string > m_Warnings;
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OptionWithValueArray m_OptionValues;
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};
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};
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#endif
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/*================================================================================================*/
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/* EOF */
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/*================================================================================================*/
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