/*
* Json.h
* Encoding and Decoding of Atomese in JSON format.
*
* Copyright (C) 2020, 2021 Linas Vepstas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License v3 as
* published by the Free Software Foundation and including the exceptions
* at http://opencog.org/wiki/Licenses
*
* 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 Affero General Public License
* along with this program; if not, write to:
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _JSON_ECODE_H
#define _JSON_ECODE_H
#include <string>
#include <opencog/atoms/base/Handle.h>
namespace opencog
{
/** \addtogroup grp_persist
* @{
*/
class Json
{
public:
/// Decode the JSON containing an atom, starting at
/// location `pos`. Return the Atom, and update `pos` to point
/// just past the end of the trailing brace.
static Handle decode_atom(const std::string& s, size_t& pos)
{
size_t start = pos;
size_t end = s.length();
return decode_atom(s, start, end);
}
static Handle decode_atom(const std::string& s) {
size_t junk = 0;
return decode_atom(s, junk);
}
static Handle decode_atom(const std::string& s,
size_t& l, size_t& r);
static std::string get_node_name(const std::string&, size_t& l, size_t& r);
static std::string get_node_name_arg(const std::string& s, size_t& pos, size_t& r);
static ValuePtr decode_value(const std::string&, size_t&, size_t&);
static Type decode_type(const std::string& s, size_t& pos);
static Type decode_type_arg(const std::string& s, size_t& pos);
// -------------------------------------------
// Encoding functions
static std::string encode_atom(const Handle&, const std::string& = "");
static std::string encode_value(const ValuePtr&, const std::string& = "");
static std::string encode_atom_values(const Handle&);
static std::string encode_type_list(const std::vector<Type>&);
};
/** @}*/
} // namespace opencog
#endif // _JSON_ECODE_H