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// -*- mode: c++; c-basic-offset:4 -*-
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// This file is part of libdap, A C++ implementation of the OPeNDAP Data
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// Access Protocol.
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// Copyright (c) 2014 OPeNDAP, Inc.
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// Author: James Gallagher <jgallagher@opendap.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
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#ifndef D4_FUNCTION_DRIVER_H_
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#define D4_FUNCTION_DRIVER_H_
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#include <string>
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#include <vector>
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#include <stack>
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namespace libdap {
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class location;
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class BaseType;
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class Array;
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class ServerFunctionsList;
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class DMR;
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class D4Dimension;
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class D4RValue;
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class D4RValueList;
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/**
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* Driver for the DAP4 Functional expression parser.
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*/
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class D4FunctionEvaluator
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{
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bool d_trace_scanning;
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bool d_trace_parsing;
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std::string d_expr;
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DMR *d_dmr;
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ServerFunctionsList *d_sf_list;
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D4RValueList *d_result;
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std::stack<BaseType*> d_basetype_stack;
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unsigned long long d_arg_length_hint;
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// d_expr should be set by parse! Its value is used by the parser right before
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// the actual parsing operation starts. jhrg 11/26/13
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std::string *expression()
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{
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return &d_expr;
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}
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void push_basetype(BaseType *btp)
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{
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d_basetype_stack.push(btp);
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}
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BaseType *top_basetype() const
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{
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return d_basetype_stack.empty() ? 0 : d_basetype_stack.top();
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}
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void pop_basetype()
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{
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d_basetype_stack.pop();
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}
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D4RValue *build_rvalue(const std::string &id;;
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friend class D4FunctionParser;
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public:
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D4FunctionEvaluator() :
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d_trace_scanning(false), d_trace_parsing(false), d_expr(""), d_dmr(0), d_sf_list(0), d_result(0), d_arg_length_hint(
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0)
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{
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}
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D4FunctionEvaluator(DMR *dmr, ServerFunctionsList *sf_list) :
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d_trace_scanning(false), d_trace_parsing(false), d_expr(""), d_dmr(dmr), d_sf_list(sf_list), d_result(0), d_arg_length_hint(
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0)
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{
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}
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virtual ~D4FunctionEvaluator()
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{
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}
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bool parse(const std::string &expr;;
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bool trace_scanning() const
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{
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return d_trace_scanning;
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}
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void set_trace_scanning(bool ts)
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{
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d_trace_scanning = ts;
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}
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bool trace_parsing() const
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{
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return d_trace_parsing;
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}
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void set_trace_parsing(bool tp)
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{
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d_trace_parsing = tp;
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}
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/** Get the result of parsing the function(s)
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*
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* @return The result(s) packages in a D4RValueList
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*/
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D4RValueList *result() const
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{
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return d_result;
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}
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void set_result(D4RValueList *rv_list)
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{
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d_result = rv_list;
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}
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void eval(DMR *dmr);
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unsigned long long get_arg_length_hint() const
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{
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return d_arg_length_hint;
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}
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void set_arg_length_hint(unsigned long long alh)
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{
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d_arg_length_hint = alh;
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}
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DMR *dmr() const
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{
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return d_dmr;
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}
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void set_dmr(DMR *dmr)
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{
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d_dmr = dmr;
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}
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ServerFunctionsList *sf_list() const
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{
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return d_sf_list;
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}
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void set_sf_list(ServerFunctionsList *sf_list)
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{
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d_sf_list = sf_list;
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}
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template<typename t> std::vector<t> *init_arg_list(t val);
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void error(const libdap::location &l, const std::string &m);
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};
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} /* namespace libdap */
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#endif /* D4_FUNCTION_DRIVER_H_ */
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