mirror of https://gitlab.com/rnger/amath
119 lines
3.1 KiB
C++
119 lines
3.1 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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#include "eval.h"
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#include "amath.h"
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#include "amathc.h"
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#include "system/program.h"
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EvalStatement::EvalStatement(ExpressionNode *expression, bool resultOnly) :
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StatementNode(), expression(expression)
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{
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this->resultOnly = resultOnly;
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}
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EvalStatement::~EvalStatement()
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{
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if (expression != nullptr)
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{
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delete expression;
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}
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}
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char *EvalStatement::Execute()
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{
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Number *result = expression->Evaluate();
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Number *temp = result->Clone();
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const char *val = Program->Output->GetText(result);
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Program->SetLastResult(temp);
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delete temp;
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if (resultOnly)
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{
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output->Empty();
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output->EnsureSize(StrLen(val) + 1);
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output->Append(val);
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}
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else
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{
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const char *text = expression->GetText();
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output->Empty();
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output->EnsureSize(
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StrLen(text) + 3 +
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StrLen(val) +
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StrLen(NEWLINE) + 1);
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output->Append(text);
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output->Append(" = ");
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output->Append(val);
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output->Append(NEWLINE);
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}
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return output->GetString();
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}
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SyntaxNode *EvalStatement::GetNext()
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{
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if (iterator == nullptr)
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{
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iterator = expression;
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return iterator;
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}
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return nullptr;
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}
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void EvalStatement::Attach(SyntaxNode *node)
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{
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if (expression == nullptr)
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{
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expression = static_cast<ExpressionNode *>(node);
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node->SetParent(this);
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}
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}
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void EvalStatement::Detach(SyntaxNode *node)
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{
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if (expression == node)
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{
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expression = nullptr;
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}
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}
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void EvalStatement::Replace(SyntaxNode *n, SyntaxNode *x)
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{
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if (expression == n)
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{
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delete expression;
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expression = static_cast<ExpressionNode *>(x);
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}
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}
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