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/*
* Copyright (C) 2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib 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 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
/** @file uuid.hpp
*
* Helper methods to parse and print UUIDs, intended to use
* internally in wsrep-lib.
*
* The implementation is copied from wsrep-API v26.
*/
#ifndef WSREP_UUID_HPP
#define WSREP_UUID_HPP
#include "wsrep/compiler.hpp"
#include <cstddef>
/**
* Length of UUID string representation, not including terminating '\0'.
*/
#define WSREP_LIB_UUID_STR_LEN 36
namespace wsrep
{
/**
* UUID type.
*/
typedef union uuid_
{
unsigned char data[16];
size_t alignment;
} uuid_t;
static const wsrep::uuid_t uuid_initializer = {{0, }};
/**
* Read UUID from string.
*
* @param str String to read from
* @param str_len Length of string
* @param[out] UUID to read to
*
* @return Number of bytes read or negative error code in case
* of error.
*/
int uuid_scan(const char* str, size_t str_len, wsrep::uuid_t* uuid);
/**
* Write UUID to string. The caller must allocate at least
* WSREP_LIB_UUID_STR_LEN + 1 space for the output str parameter.
*
* @param uuid UUID to print
* @param str[out] Output buffer
* @param str_len Size of output buffer
*
* @return Number of chars printerd, negative error code in case of
* error.
*/
int uuid_print(const wsrep::uuid_t* uuid, char* str, size_t str_len);
}
#endif // WSREP_UUID_HPP
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