Andrzej Rybczak
13 years ago
parent
7167d036d0
commit
88a3bdb507
8 changed files with 182 additions and 82 deletions
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/***************************************************************************
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* Copyright (C) 2008-2013 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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#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 "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 |
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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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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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