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/*
* Copyright (c) 2021 Yubico AB. All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the LICENSE file.
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <errno.h>
#include "fido.h"
static int
timespec_to_ms(const struct timespec *ts)
{
int64_t x, y;
if (ts->tv_sec < 0 || ts->tv_nsec < 0 ||
ts->tv_nsec >= 1000000000LL)
return -1;
if ((uint64_t)ts->tv_sec >= INT64_MAX / 1000LL)
return -1;
x = ts->tv_sec * 1000LL;
y = ts->tv_nsec / 1000000LL;
if (INT64_MAX - x < y || x + y > INT_MAX)
return -1;
return (int)(x + y);
}
int
fido_time_now(struct timespec *ts_now)
{
if (clock_gettime(CLOCK_MONOTONIC, ts_now) != 0) {
fido_log_error(errno, "%s: clock_gettime", __func__);
return -1;
}
return 0;
}
int
fido_time_delta(const struct timespec *ts_start, int *ms_remain)
{
struct timespec ts_end, ts_delta;
int ms;
if (*ms_remain < 0)
return 0;
if (clock_gettime(CLOCK_MONOTONIC, &ts_end) != 0) {
fido_log_error(errno, "%s: clock_gettime", __func__);
return -1;
}
if (timespeccmp(&ts_end, ts_start, <)) {
fido_log_debug("%s: timespeccmp", __func__);
return -1;
}
timespecsub(&ts_end, ts_start, &ts_delta);
if ((ms = timespec_to_ms(&ts_delta)) < 0) {
fido_log_debug("%s: timespec_to_ms", __func__);
return -1;
}
if (ms > *ms_remain)
ms = *ms_remain;
*ms_remain -= ms;
return 0;
}
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