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// Copyright (c) 2015-2015 Josh Blum
// SPDX-License-Identifier: BSL-1.0
#include <SoapySDR/Time.hpp>
#include <cstdlib>
#include <cstdio>
#include <cmath>
static bool loopbackTimeToTicks(const long long timeNs, const double rate)
{
const long long ticks = SoapySDR::timeNsToTicks(timeNs, rate);
const long long outTime = SoapySDR::ticksToTimeNs(ticks, rate);
//we expect error because timeNs specifies a sub-tick
if (std::abs(timeNs - outTime)/1e9 < rate) return true;
printf("FAIL: loopbackTimeToTicks(%lld, %f)\n", timeNs, rate);
printf(" ticks = %lld, outTime = %lld\n", ticks, outTime);
printf(" error = %f secs\n", std::abs(timeNs - outTime)/1e9);
return false;
}
static bool loopbackTicksToTime(const long long ticks, const double rate)
{
const long long timeNs = SoapySDR::ticksToTimeNs(ticks, rate);
const long long outTicks = SoapySDR::timeNsToTicks(timeNs, rate);
if (std::abs(ticks - outTicks) == 0) return true;
printf("FAIL: loopbackTicksToTime(%lld, %f)\n", ticks, rate);
printf(" timeNs = %lld, outTicks = %lld\n", timeNs, outTicks);
printf(" error = %d ticks\n", int(std::abs(ticks - outTicks)));
return false;
}
//http://stackoverflow.com/questions/8120062/generate-random-64-bit-integer
static unsigned rand256(void)
{
static unsigned const limit = RAND_MAX - RAND_MAX % 256;
unsigned result = std::rand();
while ( result >= limit )
{
result = std::rand();
}
return result % 256;
}
static unsigned long long rand64bits(void)
{
unsigned long long results = 0ULL;
for ( int count = 8; count > 0; -- count)
{
results = 256U * results + rand256();
}
return results;
}
int main(void)
{
//test that random times can make it through the conversion
printf("Test random times...\n");
for (size_t i = 0; i < 100; i++)
{
const long long timeNs = rand64bits();
if (not loopbackTimeToTicks(timeNs, 1e9)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(-timeNs, 1e9)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(timeNs, 52e6)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(-timeNs, 52e6)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(timeNs, 61.44e6)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(-timeNs, 61.44e6)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(timeNs, 100e6/3)) return EXIT_FAILURE;
if (not loopbackTimeToTicks(-timeNs, 100e6/3)) return EXIT_FAILURE;
}
printf("OK\n");
//test random ticks for several different rates
printf("Test random ticks...\n");
for (size_t i = 0; i < 100; i++)
{
const long long ticks = rand64bits() >> 8; //room for max rate
if (not loopbackTicksToTime(ticks, 1e9)) return EXIT_FAILURE;
if (not loopbackTicksToTime(-ticks, 1e9)) return EXIT_FAILURE;
if (not loopbackTicksToTime(ticks, 52e6)) return EXIT_FAILURE;
if (not loopbackTicksToTime(-ticks, 52e6)) return EXIT_FAILURE;
if (not loopbackTicksToTime(ticks, 61.44e6)) return EXIT_FAILURE;
if (not loopbackTicksToTime(-ticks, 61.44e6)) return EXIT_FAILURE;
if (not loopbackTicksToTime(ticks, 100e6/3)) return EXIT_FAILURE;
if (not loopbackTicksToTime(-ticks, 100e6/3)) return EXIT_FAILURE;
}
printf("OK\n");
printf("DONE!\n");
return EXIT_SUCCESS;
}
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