126 lines
3.9 KiB
C++
126 lines
3.9 KiB
C++
/***************************************************************************
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* Copyright (C) 2008-2014 by Andrzej Rybczak *
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* electricityispower@gmail.com *
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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 2 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, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef NCMPCPP_UTILITY_CONVERSION_H
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#define NCMPCPP_UTILITY_CONVERSION_H
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#include <boost/format.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/type_traits/is_unsigned.hpp>
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#include "config.h"
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#include "gcc.h"
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struct ConversionError
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{
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ConversionError(std::string source) : m_source_value(source) { }
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const std::string &value() { return m_source_value; }
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private:
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std::string m_target_type;
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std::string m_source_value;
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};
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struct OutOfBounds : std::exception
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{
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const std::string &errorMessage() { return m_error_message; }
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template <typename Type>
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GNUC_NORETURN static void raise(const Type &value, const Type &lbound, const Type &ubound)
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{
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throw OutOfBounds((boost::format(
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"value is out of bounds ([%1%, %2%] expected, %3% given)") % lbound % ubound % value).str());
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}
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template <typename Type>
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GNUC_NORETURN static void raiseLower(const Type &value, const Type &lbound)
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{
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throw OutOfBounds((boost::format(
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"value is out of bounds ([%1%, ->) expected, %2% given)") % lbound % value).str());
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}
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template <typename Type>
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GNUC_NORETURN static void raiseUpper(const Type &value, const Type &ubound)
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{
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throw OutOfBounds((boost::format(
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"value is out of bounds ((<-, %1%] expected, %2% given)") % ubound % value).str());
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}
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virtual const char *what() const noexcept OVERRIDE { return m_error_message.c_str(); }
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private:
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OutOfBounds(std::string msg) : m_error_message(msg) { }
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std::string m_error_message;
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};
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template <typename TargetT, bool isUnsigned>
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struct unsigned_checker
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{
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static void apply(const std::string &) { }
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};
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template <typename TargetT>
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struct unsigned_checker<TargetT, true>
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{
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static void apply(const std::string &s)
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{
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if (s[0] == '-')
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throw ConversionError(s);
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}
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};
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template <typename TargetT>
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TargetT fromString(const std::string &source)
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{
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unsigned_checker<TargetT, boost::is_unsigned<TargetT>::value>::apply(source);
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try
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{
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return boost::lexical_cast<TargetT>(source);
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}
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catch (boost::bad_lexical_cast &)
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{
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throw ConversionError(source);
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}
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}
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template <typename Type>
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void boundsCheck(const Type &value, const Type &lbound, const Type &ubound)
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{
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if (value < lbound || value > ubound)
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OutOfBounds::raise(value, lbound, ubound);
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}
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template <typename Type>
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void lowerBoundCheck(const Type &value, const Type &lbound)
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{
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if (value < lbound)
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OutOfBounds::raiseLower(value, lbound);
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}
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template <typename Type>
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void upperBoundCheck(const Type &value, const Type &ubound)
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{
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if (value > ubound)
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OutOfBounds::raiseUpper(value, ubound);
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}
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#endif // NCMPCPP_UTILITY_CONVERSION_H
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