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// SPDX-License-Identifier: Apache-2.0
/*
* Copyright 2018-2020 Joel E. Anderson
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include "private/config/have_gmtime_r.h"
#include "private/formatter.h"
size_t
gmtime_r_get_now( char *buffer ) {
int gettime_result;
struct tm now_tm;
struct timespec now_ts;
const struct tm *gmtime_result;
size_t written;
gettime_result = clock_gettime( CLOCK_REALTIME, &now_ts );
if( gettime_result != 0 ) {
return 0;
}
gmtime_result = gmtime_r( &(now_ts.tv_sec), &now_tm );
if( !gmtime_result ) {
return 0;
}
written = strftime( buffer,
RFC_5424_WHOLE_TIME_BUFFER_SIZE,
"%FT%T",
&now_tm );
written += snprintf( buffer + written,
RFC_5424_TIME_SECFRAC_BUFFER_SIZE + 2,
".%06ldZ",
( now_ts.tv_nsec / 1000 ) % 1000000 );
return written;
}