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//
// Copyright 2015 Ettus Research LLC
//
// This program 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.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "function_table.hpp"
#include "basic_functions.hpp"
#include <boost/bind.hpp>
#include <boost/foreach.hpp>
#include <boost/format.hpp>
#include <map>
using namespace uhd::rfnoc::nocscript;
class function_table_impl : public function_table
{
public:
struct function_info {
expression::type_t return_type;
function_ptr function;
function_info() {};
function_info(const expression::type_t return_type_, const function_ptr &function_)
: return_type(return_type_), function(function_)
{};
};
// Should be an unordered_map... sigh, we'll get to C++11 someday.
typedef std::map<std::string, std::map<expression_function::argtype_list_type, function_info> > table_type;
/************************************************************************
* Structors
***********************************************************************/
function_table_impl()
{
_REGISTER_ALL_FUNCS();
}
~function_table_impl() {};
/************************************************************************
* Interface implementation
***********************************************************************/
bool function_exists(const std::string &name) const {
return bool(_table.count(name));
}
bool function_exists(
const std::string &name,
const expression_function::argtype_list_type &arg_types
) const {
table_type::const_iterator it = _table.find(name);
return (it != _table.end()) and bool(it->second.count(arg_types));
}
expression::type_t get_type(
const std::string &name,
const expression_function::argtype_list_type &arg_types
) const {
table_type::const_iterator it = _table.find(name);
if (it == _table.end() or (it->second.find(arg_types) == it->second.end())) {
throw uhd::syntax_error(str(
boost::format("Unable to retrieve return value for function %s")
% expression_function::to_string(name, arg_types)
));
}
return it->second.find(arg_types)->second.return_type;
}
expression_literal eval(
const std::string &name,
const expression_function::argtype_list_type &arg_types,
expression_container::expr_list_type &arguments
) {
if (not function_exists(name, arg_types)) {
throw uhd::syntax_error(str(
boost::format("Cannot eval() function %s, not a known signature")
% expression_function::to_string(name, arg_types)
));
}
return _table[name][arg_types].function(arguments);
}
void register_function(
const std::string &name,
const function_table::function_ptr &ptr,
const expression::type_t return_type,
const expression_function::argtype_list_type &sig
) {
_table[name][sig] = function_info(return_type, ptr);
}
private:
table_type _table;
};
function_table::sptr function_table::make()
{
return sptr(new function_table_impl());
}
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