#1985 Expression Parser: Add exprtk to ThirdParty

ThirdParty/expressionparser/ExpressionParserImpl.cpp

@@ -0,0 +1,104 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2017-     Statoil ASA
+// 
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+// 
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+// 
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html> 
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "ExpressionParserImpl.h"
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+ExpressionParserImpl::ExpressionParserImpl()
+{
+
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void ExpressionParserImpl::setExpression(const QString& expression)
+{
+    m_expression = expression;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+std::vector<QString> ExpressionParserImpl::detectReferencedVariables(const QString& expression)
+{
+    std::vector<QString> referencedVariables;
+    {
+        std::vector<std::string> variable_list;
+        exprtk::collect_variables(expression.toStdString(), variable_list);
+
+        for (const auto& s : variable_list)
+        {
+            referencedVariables.push_back(QString::fromStdString(s));
+        }
+    }
+
+    return referencedVariables;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void ExpressionParserImpl::assignVector(const QString& variableName, std::vector<double>& vector)
+{
+    m_symbol_table.add_vector(variableName.toStdString(), vector);
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool ExpressionParserImpl::evaluate()
+{
+    expression_t expression;
+
+    expression.register_symbol_table(m_symbol_table);
+
+    if (!parser.compile(m_expression.toStdString(), expression))
+    {
+        return false;
+    }
+
+    // Trigger evaluation
+    expression.value();
+
+    return (parser.error_count() == 0);
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+QString ExpressionParserImpl::errorText() const
+{
+    QString txt;
+
+    for (size_t i = 0; i < parser.error_count(); i++)
+    {
+        auto error = parser.get_error(i);
+
+        QString errorMsg = QString("Position: %1   Type: [%2]   Msg: %3\n")
+            .arg(static_cast<int>(error.token.position))
+            .arg(exprtk::parser_error::to_str(error.mode).c_str())
+            .arg(error.diagnostic.c_str());
+        
+        txt += errorMsg;
+    }
+
+    return txt;
+}