mirror of https://gitlab.com/rnger/amath
213 lines
4.5 KiB
C++
213 lines
4.5 KiB
C++
/*-
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* Copyright (c) 2014-2021 Carsten Sonne Larsen <cs@innolan.net>
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Project homepage:
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* https://amath.innolan.net
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*
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*/
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#ifndef AMATH_VALUES_H
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#define AMATH_VALUES_H
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/**
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* @file values.h
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* @brief Application logic tied to numbers and values.
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*
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*/
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#include "nodes.h"
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#include "lib/numb.h"
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#include "statement/node.h"
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class Variable;
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/**
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* @brief A list of user defined variables.
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*
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*/
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class VariableList
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{
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public:
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VariableList();
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~VariableList();
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void Clear();
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bool Delete(const char* name);
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Variable* GetFirstVariable() const;
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Variable* GetVariable(const char* name) const;
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Variable* CreateVariable(const char* name);
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Variable* InsertTemporaryVariable(Variable* variable);
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void RemoveTemporaryVariable();
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char* List() const;
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char* ListDefinitions() const;
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private:
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char* ListContent(bool cmdFormat) const;
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CharBuffer* buf;
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Variable* first;
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};
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/**
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* @brief A user defined variable.
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*
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*/
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class Variable
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{
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public:
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explicit Variable(const char* name);
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~Variable();
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char* GetName() const;
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Number* GetValue() const;
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void AssignValue(Number* value);
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Variable* Next;
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private:
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char* name;
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Number* value;
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bool chainDelete;
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friend bool VariableList::Delete(const char* name);
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};
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/**
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* @brief Statement to list all user defined variables.
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*
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*/
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class ListVariablesStatement : public virtual StatementNode
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{
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public:
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ListVariablesStatement();
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char* Execute();
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};
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/**
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* @brief Use of a variable in a syntax tree.
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*
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*/
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class VariableNode : public ExpressionNode
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{
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public:
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explicit VariableNode(Variable* variable);
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char* GetText();
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Number* Evaluate();
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void AssignValue(Number* value) const;
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int GetPrecedence();
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SyntaxNode* GetNext();
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void Attach(SyntaxNode* node);
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void Detach(SyntaxNode* node);
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void Replace(SyntaxNode* n, SyntaxNode* x);
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protected:
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char* GetNodeText();
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private:
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Variable* variable;
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};
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/**
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* @brief Use of last result in a syntax tree.
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*
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*/
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class InsVariableNode : public VariableNode
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{
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public:
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InsVariableNode();
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char* GetText();
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Number* Evaluate();
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protected:
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char* GetNodeText();
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};
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/**
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* @brief Use of a numeric value in a syntax tree.
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*
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*/
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class NumericValueNode : public ExpressionNode
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{
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public:
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NumericValueNode();
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explicit NumericValueNode(Number* value);
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virtual ReductionType GetReductionType();
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int GetPrecedence();
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char* GetText();
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SyntaxNode* GetNext();
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Number* Evaluate();
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void Attach(SyntaxNode* node);
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void Detach(SyntaxNode* node);
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void Replace(SyntaxNode* n, SyntaxNode* x);
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void ReplaceWith(Number* value);
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protected:
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char* GetNodeText();
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};
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/**
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* @brief Use of Euler's number in a syntax tree.
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*
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*/
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class EulersNumberNode : public NumericValueNode
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{
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public:
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EulersNumberNode();
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ReductionType GetReductionType();
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protected:
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char* GetNodeText();
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};
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/**
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* @brief Use of PI in a syntax tree.
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*
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*/
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class PiNode : public NumericValueNode
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{
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public:
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PiNode();
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ReductionType GetReductionType();
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protected:
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char* GetNodeText();
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};
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/**
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* @brief Use of the square root of -2 in a syntax tree.
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*
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*/
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class ComplexiNode : public NumericValueNode
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{
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public:
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ComplexiNode();
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ReductionType GetReductionType();
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protected:
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char* GetNodeText();
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};
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#endif
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