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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef INCLUDED_ORCUS_TOKENS_HPP
#define INCLUDED_ORCUS_TOKENS_HPP
#include "types.hpp"
#include <algorithm>
#include <unordered_map>
namespace orcus {
/**
* XML token store that provides mapping of integral token indentifiers and
* their original names. Instances of this class are typically used as global
* constants.
*
* @note The string values for the original token names should be static
* values whose values and memory addresses remain unchanged during the
* life cycle of the instance that references them.
*
* @note This class is not copy-constructible.
*/
class ORCUS_PSR_DLLPUBLIC tokens
{
public:
tokens() = delete;
tokens(const tokens&) = delete;
tokens(const char** token_names, size_t token_name_count);
~tokens();
/**
* Check if a token returned from get_token() method is valid.
*
* @return true if valid, false otherwise.
*/
bool is_valid_token(xml_token_t token) const;
/**
* Get token from a specified name.
*
* @param name textural token name
*
* @return token value representing the given textural token.
*/
xml_token_t get_token(std::string_view name) const;
/**
* Get textural token name from a token value.
*
* @param token numeric token value
*
* @return textural token name, or empty string in case the given token is
* not valid.
*/
std::string_view get_token_name(xml_token_t token) const;
private:
using token_map_type = std::unordered_map<std::string_view, xml_token_t>;
token_map_type m_tokens;
const char** m_token_names;
size_t m_token_name_count;
};
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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