mirror of https://github.com/Icinga/icinga2.git
668 lines
20 KiB
C++
668 lines
20 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "config/expression.hpp"
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#include "config/configitem.hpp"
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#include "config/configitembuilder.hpp"
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#include "config/applyrule.hpp"
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#include "config/objectrule.hpp"
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#include "base/array.hpp"
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#include "base/json.hpp"
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#include "base/scriptfunction.hpp"
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#include "base/scriptvariable.hpp"
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#include "base/utility.hpp"
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#include "base/objectlock.hpp"
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#include "base/object.hpp"
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#include "base/logger.hpp"
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#include "base/configerror.hpp"
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#include <boost/foreach.hpp>
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#include <boost/exception_ptr.hpp>
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#include <boost/exception/errinfo_nested_exception.hpp>
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using namespace icinga;
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Expression::Expression(OpCallback op, const Value& operand1, const DebugInfo& di)
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: m_Operator(op), m_Operand1(operand1), m_Operand2(), m_DebugInfo(di)
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{ }
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Expression::Expression(OpCallback op, const Value& operand1, const Value& operand2, const DebugInfo& di)
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: m_Operator(op), m_Operand1(operand1), m_Operand2(operand2), m_DebugInfo(di)
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{ }
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Value Expression::Evaluate(const Dictionary::Ptr& locals, DebugHint *dhint) const
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{
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try {
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#ifdef _DEBUG
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if (m_Operator != &Expression::OpLiteral) {
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std::ostringstream msgbuf;
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ShowCodeFragment(msgbuf, m_DebugInfo, false);
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Log(LogDebug, "Expression")
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<< "Executing:\n" << msgbuf.str();
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}
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#endif /* _DEBUG */
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return m_Operator(this, locals, dhint);
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} catch (const std::exception& ex) {
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if (boost::get_error_info<boost::errinfo_nested_exception>(ex))
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throw;
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else
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BOOST_THROW_EXCEPTION(ConfigError("Error while evaluating expression: " + String(ex.what())) << boost::errinfo_nested_exception(boost::current_exception()) << errinfo_debuginfo(m_DebugInfo));
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}
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}
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void Expression::MakeInline(void)
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{
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if (m_Operator == &Expression::OpDict)
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m_Operand2 = true;
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}
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void Expression::DumpOperand(std::ostream& stream, const Value& operand, int indent) {
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if (operand.IsObjectType<Array>()) {
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Array::Ptr arr = operand;
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stream << String(indent, ' ') << "Array:\n";
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ObjectLock olock(arr);
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BOOST_FOREACH(const Value& elem, arr) {
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DumpOperand(stream, elem, indent + 1);
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}
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} else if (operand.IsObjectType<Expression>()) {
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Expression::Ptr left = operand;
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left->Dump(stream, indent);
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} else {
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stream << String(indent, ' ') << JsonEncode(operand) << "\n";
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}
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}
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void Expression::Dump(std::ostream& stream, int indent) const
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{
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String sym = Utility::GetSymbolName(reinterpret_cast<const void *>(m_Operator));
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stream << String(indent, ' ') << "op: " << Utility::DemangleSymbolName(sym) << "\n";
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stream << String(indent, ' ') << "left:\n";
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DumpOperand(stream, m_Operand1, indent + 1);
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stream << String(indent, ' ') << "right:\n";
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DumpOperand(stream, m_Operand2, indent + 1);
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}
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Value Expression::EvaluateOperand1(const Dictionary::Ptr& locals, DebugHint *dhint) const
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{
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return static_cast<Expression::Ptr>(m_Operand1)->Evaluate(locals, dhint);
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}
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Value Expression::EvaluateOperand2(const Dictionary::Ptr& locals, DebugHint *dhint) const
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{
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return static_cast<Expression::Ptr>(m_Operand2)->Evaluate(locals, dhint);
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}
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Value Expression::OpLiteral(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->m_Operand1;
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}
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Value Expression::OpVariable(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Dictionary::Ptr scope = locals;
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while (scope) {
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if (scope->Contains(expr->m_Operand1))
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return scope->Get(expr->m_Operand1);
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scope = scope->Get("__parent");
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}
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return ScriptVariable::Get(expr->m_Operand1);
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}
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Value Expression::OpNegate(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return ~(long)expr->EvaluateOperand1(locals);
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}
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Value Expression::OpLogicalNegate(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return !expr->EvaluateOperand1(locals).ToBool();
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}
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Value Expression::OpAdd(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) + expr->EvaluateOperand2(locals);
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}
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Value Expression::OpSubtract(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) - expr->EvaluateOperand2(locals);
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}
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Value Expression::OpMultiply(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) * expr->EvaluateOperand2(locals);
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}
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Value Expression::OpDivide(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) / expr->EvaluateOperand2(locals);
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}
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Value Expression::OpBinaryAnd(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) & expr->EvaluateOperand2(locals);
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}
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Value Expression::OpBinaryOr(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) | expr->EvaluateOperand2(locals);
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}
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Value Expression::OpShiftLeft(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) << expr->EvaluateOperand2(locals);
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}
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Value Expression::OpShiftRight(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) >> expr->EvaluateOperand2(locals);
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}
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Value Expression::OpEqual(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) == expr->EvaluateOperand2(locals);
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}
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Value Expression::OpNotEqual(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) != expr->EvaluateOperand2(locals);
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}
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Value Expression::OpLessThan(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) < expr->EvaluateOperand2(locals);
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}
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Value Expression::OpGreaterThan(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) > expr->EvaluateOperand2(locals);
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}
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Value Expression::OpLessThanOrEqual(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) <= expr->EvaluateOperand2(locals);
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}
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Value Expression::OpGreaterThanOrEqual(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals) >= expr->EvaluateOperand2(locals);
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}
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Value Expression::OpIn(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value right = expr->EvaluateOperand2(locals);
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if (right.IsEmpty())
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return false;
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else if (!right.IsObjectType<Array>())
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BOOST_THROW_EXCEPTION(ConfigError("Invalid right side argument for 'in' operator: " + JsonEncode(right)));
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Value left = expr->EvaluateOperand1(locals);
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Array::Ptr arr = right;
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bool found = false;
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ObjectLock olock(arr);
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BOOST_FOREACH(const Value& value, arr) {
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if (value == left) {
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found = true;
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break;
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}
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}
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return found;
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}
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Value Expression::OpNotIn(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return !OpIn(expr, locals, dhint);
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}
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Value Expression::OpLogicalAnd(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals).ToBool() && expr->EvaluateOperand2(locals).ToBool();
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}
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Value Expression::OpLogicalOr(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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return expr->EvaluateOperand1(locals).ToBool() || expr->EvaluateOperand2(locals).ToBool();
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}
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Value Expression::OpFunctionCall(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value funcName = expr->EvaluateOperand1(locals);
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ScriptFunction::Ptr func;
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if (funcName.IsObjectType<ScriptFunction>())
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func = funcName;
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else
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func = ScriptFunction::GetByName(funcName);
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if (!func)
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BOOST_THROW_EXCEPTION(ConfigError("Function '" + funcName + "' does not exist."));
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Array::Ptr arr = expr->EvaluateOperand2(locals);
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std::vector<Value> arguments;
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for (Array::SizeType index = 0; index < arr->GetLength(); index++) {
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const Expression::Ptr& aexpr = arr->Get(index);
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arguments.push_back(aexpr->Evaluate(locals));
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}
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return func->Invoke(arguments);
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}
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Value Expression::OpArray(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Array::Ptr arr = expr->m_Operand1;
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Array::Ptr result = make_shared<Array>();
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if (arr) {
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for (Array::SizeType index = 0; index < arr->GetLength(); index++) {
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const Expression::Ptr& aexpr = arr->Get(index);
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result->Add(aexpr->Evaluate(locals));
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}
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}
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return result;
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}
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Value Expression::OpDict(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Array::Ptr arr = expr->m_Operand1;
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bool in_place = expr->m_Operand2;
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Dictionary::Ptr result = make_shared<Dictionary>();
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result->Set("__parent", locals);
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if (arr) {
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for (Array::SizeType index = 0; index < arr->GetLength(); index++) {
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const Expression::Ptr& aexpr = arr->Get(index);
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Dictionary::Ptr alocals = in_place ? locals : result;
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aexpr->Evaluate(alocals, dhint);
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if (alocals->Contains("__result"))
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break;
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}
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}
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Dictionary::Ptr xresult = result->ShallowClone();
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xresult->Remove("__parent");
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return xresult;
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}
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Value Expression::OpSet(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value index = expr->EvaluateOperand1(locals);
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DebugHint *sdhint = NULL;
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if (dhint)
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sdhint = dhint->GetChild(index);
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Value right = expr->EvaluateOperand2(locals, sdhint);
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locals->Set(index, right);
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if (sdhint)
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sdhint->AddMessage("=", expr->m_DebugInfo);
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return right;
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}
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Value Expression::OpSetPlus(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value index = expr->EvaluateOperand1(locals);
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Value left = locals->Get(index);
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Expression::Ptr exp_right = expr->m_Operand2;
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Dictionary::Ptr xlocals = locals;
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if (exp_right->m_Operator == &Expression::OpDict) {
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xlocals = left;
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if (!xlocals)
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xlocals = make_shared<Dictionary>();
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xlocals->Set("__parent", locals);
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}
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DebugHint *sdhint = NULL;
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if (dhint)
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sdhint = dhint->GetChild(index);
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Value result = left + expr->EvaluateOperand2(xlocals, sdhint);
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if (exp_right->m_Operator == &Expression::OpDict) {
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Dictionary::Ptr dict = result;
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dict->Remove("__parent");
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}
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locals->Set(index, result);
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if (sdhint)
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sdhint->AddMessage("+=", expr->m_DebugInfo);
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return result;
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}
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Value Expression::OpSetMinus(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value index = expr->EvaluateOperand1(locals);
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Value left = locals->Get(index);
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Expression::Ptr exp_right = expr->m_Operand2;
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Dictionary::Ptr xlocals = locals;
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if (exp_right->m_Operator == &Expression::OpDict) {
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xlocals = left;
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if (!xlocals)
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xlocals = make_shared<Dictionary>();
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xlocals->Set("__parent", locals);
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}
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DebugHint *sdhint = NULL;
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if (dhint)
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sdhint = dhint->GetChild(index);
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Value result = left - expr->EvaluateOperand2(xlocals, sdhint);
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if (exp_right->m_Operator == &Expression::OpDict) {
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Dictionary::Ptr dict = result;
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dict->Remove("__parent");
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}
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locals->Set(index, result);
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if (sdhint)
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sdhint->AddMessage("-=", expr->m_DebugInfo);
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return result;
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}
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Value Expression::OpSetMultiply(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value index = expr->EvaluateOperand1(locals);
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Value left = locals->Get(index);
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Expression::Ptr exp_right = expr->m_Operand2;
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Dictionary::Ptr xlocals = locals;
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if (exp_right->m_Operator == &Expression::OpDict) {
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xlocals = left;
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if (!xlocals)
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xlocals = make_shared<Dictionary>();
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xlocals->Set("__parent", locals);
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}
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DebugHint *sdhint = NULL;
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if (dhint)
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sdhint = dhint->GetChild(index);
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Value result = left * expr->EvaluateOperand2(xlocals, sdhint);
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if (exp_right->m_Operator == &Expression::OpDict) {
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Dictionary::Ptr dict = result;
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dict->Remove("__parent");
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}
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locals->Set(index, result);
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if (sdhint)
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sdhint->AddMessage("*=", expr->m_DebugInfo);
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return result;
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}
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Value Expression::OpSetDivide(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value index = expr->EvaluateOperand1(locals);
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Value left = locals->Get(index);
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Expression::Ptr exp_right = expr->m_Operand2;
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Dictionary::Ptr xlocals = locals;
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if (exp_right->m_Operator == &Expression::OpDict) {
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xlocals = left;
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if (!xlocals)
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xlocals = make_shared<Dictionary>();
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xlocals->Set("__parent", locals);
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}
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DebugHint *sdhint = NULL;
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if (dhint)
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sdhint = dhint->GetChild(index);
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Value result = left / expr->EvaluateOperand2(xlocals, sdhint);
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if (exp_right->m_Operator == &Expression::OpDict) {
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Dictionary::Ptr dict = result;
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dict->Remove("__parent");
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}
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locals->Set(index, result);
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if (sdhint)
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sdhint->AddMessage("/=", expr->m_DebugInfo);
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return result;
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}
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Value Expression::OpIndexer(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value value = expr->EvaluateOperand1(locals);
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Value index = expr->EvaluateOperand2(locals);
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if (value.IsObjectType<Dictionary>()) {
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Dictionary::Ptr dict = value;
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return dict->Get(index);
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} else if (value.IsObjectType<Array>()) {
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Array::Ptr arr = value;
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return arr->Get(index);
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} else if (value.IsObjectType<Object>()) {
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Object::Ptr object = value;
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const Type *type = object->GetReflectionType();
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if (!type)
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BOOST_THROW_EXCEPTION(ConfigError("Dot operator applied to object which does not support reflection"));
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int field = type->GetFieldId(index);
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if (field == -1)
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BOOST_THROW_EXCEPTION(ConfigError("Tried to access invalid property '" + index + "'"));
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return object->GetField(field);
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} else if (value.IsEmpty()) {
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return Empty;
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} else {
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BOOST_THROW_EXCEPTION(ConfigError("Dot operator cannot be applied to type '" + value.GetTypeName() + "'"));
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}
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}
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Value Expression::OpImport(const Expression *expr, const Dictionary::Ptr& locals, DebugHint *dhint)
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{
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Value type = expr->EvaluateOperand1(locals);
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Value name = expr->EvaluateOperand2(locals);
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ConfigItem::Ptr item = ConfigItem::GetObject(type, name);
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if (!item)
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BOOST_THROW_EXCEPTION(ConfigError("Import references unknown template: '" + name + "'"));
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item->GetExpressionList()->Evaluate(locals, dhint);
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return Empty;
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}
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Value Expression::FunctionWrapper(const std::vector<Value>& arguments, const Array::Ptr& funcargs, const Expression::Ptr& expr, const Dictionary::Ptr& scope)
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{
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if (arguments.size() < funcargs->GetLength())
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BOOST_THROW_EXCEPTION(ConfigError("Too few arguments for function"));
|
|
|
|
Dictionary::Ptr locals = make_shared<Dictionary>();
|
|
locals->Set("__parent", scope);
|
|
|
|
for (std::vector<Value>::size_type i = 0; i < std::min(arguments.size(), funcargs->GetLength()); i++)
|
|
locals->Set(funcargs->Get(i), arguments[i]);
|
|
|
|
expr->Evaluate(locals);
|
|
return locals->Get("__result");
|
|
}
|
|
|
|
Value Expression::OpFunction(const Expression* expr, const Dictionary::Ptr& locals, DebugHint *dhint)
|
|
{
|
|
Array::Ptr left = expr->m_Operand1;
|
|
Expression::Ptr aexpr = left->Get(1);
|
|
String name = left->Get(0);
|
|
|
|
Array::Ptr funcargs = expr->m_Operand2;
|
|
ScriptFunction::Ptr func = make_shared<ScriptFunction>(boost::bind(&Expression::FunctionWrapper, _1, funcargs, aexpr, locals));
|
|
|
|
if (!name.IsEmpty())
|
|
ScriptFunction::Register(name, func);
|
|
|
|
return func;
|
|
}
|
|
|
|
Value Expression::OpApply(const Expression* expr, const Dictionary::Ptr& locals, DebugHint *dhint)
|
|
{
|
|
Array::Ptr left = expr->m_Operand1;
|
|
Expression::Ptr exprl = expr->m_Operand2;
|
|
String type = left->Get(0);
|
|
String target = left->Get(1);
|
|
Expression::Ptr aname = left->Get(2);
|
|
Expression::Ptr filter = left->Get(3);
|
|
|
|
String name = aname->Evaluate(locals, dhint);
|
|
|
|
ApplyRule::AddRule(type, target, name, exprl, filter, expr->m_DebugInfo, locals);
|
|
|
|
return Empty;
|
|
}
|
|
|
|
Value Expression::OpObject(const Expression* expr, const Dictionary::Ptr& locals, DebugHint *dhint)
|
|
{
|
|
Array::Ptr left = expr->m_Operand1;
|
|
Expression::Ptr exprl = expr->m_Operand2;
|
|
bool abstract = left->Get(0);
|
|
String type = left->Get(1);
|
|
Expression::Ptr aname = left->Get(2);
|
|
Expression::Ptr filter = left->Get(3);
|
|
String zone = left->Get(4);
|
|
|
|
String name = aname->Evaluate(locals, dhint);
|
|
|
|
ConfigItemBuilder::Ptr item = make_shared<ConfigItemBuilder>(expr->m_DebugInfo);
|
|
|
|
String checkName = name;
|
|
|
|
if (!abstract) {
|
|
const NameComposer *nc = dynamic_cast<const NameComposer *>(Type::GetByName(type));
|
|
|
|
if (nc)
|
|
checkName = nc->MakeName(name, Dictionary::Ptr());
|
|
}
|
|
|
|
if (!checkName.IsEmpty()) {
|
|
ConfigItem::Ptr oldItem = ConfigItem::GetObject(type, checkName);
|
|
|
|
if (oldItem) {
|
|
std::ostringstream msgbuf;
|
|
msgbuf << "Object '" << name << "' of type '" << type << "' re-defined: " << expr->m_DebugInfo << "; previous definition: " << oldItem->GetDebugInfo();
|
|
BOOST_THROW_EXCEPTION(ConfigError(msgbuf.str()) << errinfo_debuginfo(expr->m_DebugInfo));
|
|
}
|
|
}
|
|
|
|
item->SetType(type);
|
|
|
|
if (name.FindFirstOf("!") != String::NPos) {
|
|
std::ostringstream msgbuf;
|
|
msgbuf << "Name for object '" << name << "' of type '" << type << "' is invalid: Object names may not contain '!'";
|
|
BOOST_THROW_EXCEPTION(ConfigError(msgbuf.str()) << errinfo_debuginfo(expr->m_DebugInfo));
|
|
}
|
|
|
|
item->SetName(name);
|
|
|
|
item->AddExpression(exprl);
|
|
item->SetAbstract(abstract);
|
|
item->SetScope(locals);
|
|
item->SetZone(zone);
|
|
item->Compile()->Register();
|
|
|
|
ObjectRule::AddRule(type, name, exprl, filter, expr->m_DebugInfo, locals);
|
|
|
|
return Empty;
|
|
}
|
|
|
|
Value Expression::OpFor(const Expression* expr, const Dictionary::Ptr& locals, DebugHint *dhint)
|
|
{
|
|
Array::Ptr left = expr->m_Operand1;
|
|
String varname = left->Get(0);
|
|
Expression::Ptr aexpr = left->Get(1);
|
|
Expression::Ptr ascope = expr->m_Operand2;
|
|
|
|
Array::Ptr arr = aexpr->Evaluate(locals, dhint);
|
|
|
|
ObjectLock olock(arr);
|
|
BOOST_FOREACH(const Value& value, arr) {
|
|
Dictionary::Ptr xlocals = make_shared<Dictionary>();
|
|
xlocals->Set("__parent", locals);
|
|
xlocals->Set(varname, value);
|
|
|
|
ascope->Evaluate(xlocals, dhint);
|
|
}
|
|
|
|
return Empty;
|
|
}
|
|
|
|
Dictionary::Ptr DebugHint::ToDictionary(void) const
|
|
{
|
|
Dictionary::Ptr result = make_shared<Dictionary>();
|
|
|
|
Array::Ptr messages = make_shared<Array>();
|
|
typedef std::pair<String, DebugInfo> MessageType;
|
|
BOOST_FOREACH(const MessageType& message, Messages) {
|
|
Array::Ptr amsg = make_shared<Array>();
|
|
amsg->Add(message.first);
|
|
amsg->Add(message.second.Path);
|
|
amsg->Add(message.second.FirstLine);
|
|
amsg->Add(message.second.FirstColumn);
|
|
amsg->Add(message.second.LastLine);
|
|
amsg->Add(message.second.LastColumn);
|
|
messages->Add(amsg);
|
|
}
|
|
|
|
result->Set("messages", messages);
|
|
|
|
Dictionary::Ptr properties = make_shared<Dictionary>();
|
|
|
|
typedef std::map<String, DebugHint>::value_type ChildType;
|
|
BOOST_FOREACH(const ChildType& kv, Children) {
|
|
properties->Set(kv.first, kv.second.ToDictionary());
|
|
}
|
|
|
|
result->Set("properties", properties);
|
|
|
|
return result;
|
|
}
|
|
|