string_tools_lexical.h

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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
 
#ifndef _STRING_TOOLS_LEXICAL_H_
#define _STRING_TOOLS_LEXICAL_H_
 
#include "warnings.h"
#include "storages/parserse_base_utils.h"
#include <boost/lexical_cast.hpp> // A heavy header, that was extracted from the rest
 
#ifndef OUT
    #define OUT
#endif
 
namespace epee
{
namespace string_tools
{
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
    template<class XType>
    inline bool get_xtype_from_string(OUT XType& val, const std::string& str_id)
    {
        if (std::is_integral<XType>::value && !std::numeric_limits<XType>::is_signed && !std::is_same<XType, bool>::value)
        {
            for (char c : str_id)
            {
                if (!epee::misc_utils::parse::isdigit(c))
                    return false;
            }
        }
 
        try
        {
            val = boost::lexical_cast<XType>(str_id);
            return true;
        }
        catch(const std::exception& /*e*/)
        {
            //const char* pmsg = e.what();
            return false;
        }
        catch(...)
        {
            return false;
        }
 
        return true;
    }
POP_WARNINGS
 
    template<class XType>
    inline bool xtype_to_string(const  XType& val, std::string& str)
    {
        try
        {
            str = boost::lexical_cast<std::string>(val);
        }
        catch(...)
        {
            return false;
        }
 
        return true;
    }
}
}
#endif //_STRING_TOOLS_LEXICAL_H_