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/*
* Copyright (C) 2018 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/>.
*/
#include "wsrep/gtid.hpp"
#include <cerrno>
#include <iostream>
#include <sstream>
const wsrep::gtid wsrep::gtid::undefined_ = wsrep::gtid();
std::ostream& wsrep::operator<<(std::ostream& os, const wsrep::gtid& gtid)
{
return (os << gtid.id() << ":" << gtid.seqno());
}
std::istream& wsrep::operator>>(std::istream& is, wsrep::gtid& gtid)
{
std::string id_str;
std::getline(is, id_str, ':');
long long seq;
is >> seq;
if (!is)
{
is.clear(std::ios_base::failbit);
return is;
}
try
{
// wsrep::id constructor will throw if it cannot parse the
// id_str.
gtid = wsrep::gtid(wsrep::id(id_str), wsrep::seqno(seq));
}
catch (const wsrep::runtime_error& e)
{
// Formatting or extraction error. Clear the istream state and
// set failibit.
is.clear(std::ios_base::failbit);
}
return is;
}
ssize_t wsrep::scan_from_c_str(
const char* buf, size_t buf_len, wsrep::gtid& gtid)
{
std::istringstream is(std::string(buf, buf_len));
is >> gtid;
// Some failure occurred
if (!is)
{
return -EINVAL;
}
// Whole string was consumed without failures
if (is.eof())
{
return static_cast<ssize_t>(buf_len);
}
// The string was not consumed completely, return current position
// of the istream.
return static_cast<ssize_t>(is.tellg());
}
ssize_t wsrep::print_to_c_str(
const wsrep::gtid& gtid, char* buf, size_t buf_len)
{
std::ostringstream os;
os << gtid;
if (os.str().size() > buf_len)
{
return -ENOBUFS;
}
std::strncpy(buf, os.str().c_str(), os.str().size());
return static_cast<ssize_t>(os.str().size());
}
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