mirror of https://gitlab.com/rnger/amath
202 lines
4.4 KiB
C++
202 lines
4.4 KiB
C++
/*
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* Copyright (c) 2015-2017 Carsten Sonne Larsen <cs@innolan.dk>
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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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*/
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#ifndef _VALUES_H
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#define _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 "clib.h"
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#include "lib/numb.h"
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#include "main/nodes.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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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();
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Variable* GetVariable(const char *name);
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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();
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char* ListDefinitions();
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private:
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char* ListContent(bool cmdFormat);
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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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public:
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Variable(const char *name);
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~Variable();
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char* GetName();
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Number* GetValue();
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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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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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public:
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VariableNode(Variable* variable);
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char* GetText();
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Number* Evaluate();
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void AssignValue(Number *value);
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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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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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public:
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NumericValueNode();
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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 Eulers 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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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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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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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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