177 lines
4.1 KiB
C++
177 lines
4.1 KiB
C++
/*
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* This file is a part of TTCalc - a mathematical calculator
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* and is distributed under the (new) BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2006-2009, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef convertheader
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#define convertheader
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#include <windows.h>
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#include <string>
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#include "compileconfig.h"
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#include "bigtypes.h"
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class Convert
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{
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public:
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Convert();
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/*
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none, length, area, time,
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*/
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struct Type
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{
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std::string name;
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};
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struct Unit
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{
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std::string name, abbr;
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int type;
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TTMathBigMax value_numerator, value_denominator;
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Unit()
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{
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type = -1;
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value_numerator.SetZero();
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value_denominator.SetOne();
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}
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};
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std::vector<std::vector<Type> > type_tab;
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std::vector<std::vector<Unit> > unit_tab;
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void AddType(const char * name);
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void AddUnit(const char * name, const char * abbr = 0, int numerator = 0, int denominator = 1);
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void AddUnit(const char * name, const char * abbr, const char * v);
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void Init();
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const char * GetTypeName(int cid, int id);
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const char * GetUnitName(int cid, int id);
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const char * GetUnitAbbr(int cid, int id);
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int GetUnitType(int id);
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int GetTypeSize();
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int GetUnitSize();
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/*
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the return value is the same for all languages
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(in fact we're taking it from english)
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*/
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bool GetUnitValue(int id, TTMathBigMax & numerator, TTMathBigMax & denominator);
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void ErrorMessage();
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void CheckAfterInit();
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template<class ValueType>
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int Conversion(int conv_input_unit, int conv_output_unit, ValueType & result)
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{
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int c = 0;
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ValueType v1_n, v1_d; // input
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ValueType v2_n, v2_d; // output
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TTMathBigMax v1_n_, v1_d_; // input
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TTMathBigMax v2_n_, v2_d_; // output
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if( !GetUnitValue(conv_input_unit, v1_n_, v1_d_) )
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return 1;
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if( !GetUnitValue(conv_output_unit, v2_n_, v2_d_) )
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return 1;
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v1_n.FromBig( v1_n_ );
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v1_d.FromBig( v1_d_ );
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v2_n.FromBig( v2_n_ );
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v2_d.FromBig( v2_d_ );
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// result = result * (v1_n * v2_d) / (v1_d * v2_n)
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c += result.Mul(v1_n);
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c += result.Mul(v2_d);
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c += v1_d.Mul(v2_n);
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c += result.Div(v1_d);
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return (c==0)? 0 : 1;
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}
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/*
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for the interface
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*/
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int current_conv_type; // selected type of converting: none, length, area, ...
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struct CurrentConvUnit
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{
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int input, output;
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CurrentConvUnit() { input = output = -1; }
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};
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std::vector<CurrentConvUnit> current_conv_unit;
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void SetCurrentType(int c);
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int GetCurrentType();
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void CheckUnitIndex(int type);
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void CheckCurrentUnits();
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void SetCurrentUnit(int type, int input, int output);
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bool GetCurrentUnit(int type, int & input, int & output);
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// end part of gui
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};
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#endif
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