565 lines
9.4 KiB
C++
565 lines
9.4 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or 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 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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//$Id$
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#ifndef VALUE_HH
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#define VALUE_HH
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#include <string>
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#include <sstream>
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#include "attribute.hh"
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#include "expression.hh"
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using std::string;
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namespace mapnik
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{
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class value
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{
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attribute data;
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public:
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value()
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: data(0) {}
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value(int value)
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: data(value) {}
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value(double value)
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: data(value) {}
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value(string const& value)
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: data(value) {}
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value(attribute const& attr)
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: data(attr) {}
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value(value const& other)
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: data(other.data) {}
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~value() {}
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bool is_int() const
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{
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return data.type() == typeid(int);
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}
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bool is_real() const
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{
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return data.type() == typeid(double);
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}
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bool is_string() const
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{
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return data.type() == typeid(std::string);
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}
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int as_int() const
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{
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return attribute_cast<int>(data);
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}
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double as_real() const
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{
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return attribute_cast<double>(data);
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}
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string as_string() const
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{
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return attribute_cast<string>(data);
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}
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string to_string() const
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{
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return data.to_string();
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}
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bool operator<=(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() <= other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() <= other.as_real();
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}
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else
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{
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return to_string() <= other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() <= other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() <= other.as_real();
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}
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else
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{
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return to_string() <= other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() <= other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() <= other.to_string();
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}
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else
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{
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return as_string() <= other.as_string();
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}
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}
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}
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bool operator<(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() < other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() < other.as_real();
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}
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else
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{
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return to_string() < other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() < other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() < other.as_real();
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}
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else
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{
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return to_string() < other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() < other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() < other.to_string();
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}
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else
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{
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return as_string() < other.as_string();
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}
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}
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}
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bool operator>=(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() >= other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() >= other.as_real();
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}
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else
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{
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return to_string() >= other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() >= other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() >= other.as_real();
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}
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else
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{
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return to_string() >= other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() >= other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() >= other.to_string();
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}
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else
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{
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return as_string() >= other.as_string();
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}
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}
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}
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bool operator>(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() > other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() > other.as_real();
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}
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else
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{
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return to_string() > other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() > other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() > other.as_real();
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}
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else
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{
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return to_string() > other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() > other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() > other.to_string();
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}
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else
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{
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return as_string() > other.as_string();
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}
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}
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}
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bool operator!=(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() != other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() != other.as_real();
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}
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else
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{
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return to_string() != other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() != other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() != other.as_real();
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}
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else
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{
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return to_string() != other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() != other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() != other.to_string();
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}
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else
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{
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return as_string() != other.as_string();
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}
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}
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}
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bool operator==(value const& other) const
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{
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if (is_int())
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{
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if (other.is_int())
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{
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return as_int() == other.as_int();
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}
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else if (other.is_real())
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{
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return as_int() == other.as_real();
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}
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else
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{
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return to_string() == other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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return as_real() == other.as_int();
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}
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else if (other.is_real())
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{
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return as_real() == other.as_real();
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}
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else
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{
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return to_string() == other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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return as_string() == other.to_string();
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}
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else if (other.is_real())
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{
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return as_string() == other.to_string();
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}
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else
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{
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return as_string() == other.as_string();
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}
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}
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}
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value operator-() const
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{
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if (is_int())
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{
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return -(as_int());
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}
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else if (is_real())
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{
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return -(as_real());
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}
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return value();
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}
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value& operator+=(value const& other)
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{
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if (is_int())
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{
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if (other.is_int())
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{
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data = as_int() + other.as_int();
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}
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else if (other.is_real())
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{
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data = as_int() + other.as_real();
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}
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else
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{
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data = to_string() + other.as_string();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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data = as_real() + other.as_int();
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}
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else if (other.is_real())
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{
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data = as_real() + other.as_real();
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}
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else
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{
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data = to_string() + other.as_string();
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}
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}
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else
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{
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if (other.is_int())
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{
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data = as_string() + other.to_string();
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}
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else if (other.is_real())
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{
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data = as_string() + other.to_string();
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}
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else
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{
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data = as_string() + other.as_string();
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}
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}
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return *this;
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}
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value& operator-=(value const& other)
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{
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if (is_int())
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{
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if (other.is_int())
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{
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data = as_int() - other.as_int();
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}
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else if (other.is_real())
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{
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data = as_int() - other.as_real();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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data = as_real() - other.as_int();
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}
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else if (other.is_real())
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{
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data = as_real() - other.as_real();
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}
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}
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return *this;
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}
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value& operator*=(value const& other)
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{
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if (is_int())
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{
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if (other.is_int())
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{
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data = as_int() * other.as_int();
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}
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else if (other.is_real())
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{
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data = as_int() * other.as_real();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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data = as_real() * other.as_int();
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}
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else if (other.is_real())
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{
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data = as_real() * other.as_real();
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}
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}
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return *this;
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}
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value& operator/=(value const& other)
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{
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if (is_int())
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{
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if (other.is_int())
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{
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data = as_int() / other.as_int();
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}
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else if (other.is_real())
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{
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data = as_int() / other.as_real();
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}
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}
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else if (is_real())
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{
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if (other.is_int())
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{
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data = as_real() / other.as_int();
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}
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else if (other.is_real())
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{
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data = as_real() / other.as_real();
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}
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}
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return *this;
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}
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};
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inline const value operator+(value const& p1,value const& p2)
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{
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value tmp(p1);
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tmp+=p2;
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return tmp;
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}
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inline const value operator-(value const& p1,value const& p2)
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{
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value tmp(p1);
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tmp-=p2;
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return tmp;
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}
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inline const value operator*(value const& p1,value const& p2)
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{
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value tmp(p1);
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tmp*=p2;
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return tmp;
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}
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inline const value operator/(value const& p1,value const& p2)
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{
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value tmp(p1);
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tmp/=p2;
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return tmp;
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}
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template <typename charT, typename traits>
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inline std::basic_ostream<charT,traits>&
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operator << (std::basic_ostream<charT,traits>& out,
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const value& p)
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{
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out << p.to_string();
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return out;
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}
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}
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#endif //VALUE_HH
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