uhd: fixes for time_spec's to_ticks and from_ticks calls

The fixes address rouding issues when the tick_rate is a non-integer.

Conflicts:

	host/tests/time_spec_test.cpp

1 files changed, 29 insertions, 0 deletions

diff --git a/host/tests/time_spec_test.cpp b/host/tests/time_spec_test.cpp
index 102b7cda3..7dee95c5c 100644
--- a/host/tests/time_spec_test.cpp
+++ b/host/tests/time_spec_test.cpp
@@ -97,3 +97,32 @@ BOOST_AUTO_TEST_CASE(test_time_spec_neg_values){
     BOOST_CHECK(tsa > tsb);
     BOOST_CHECK(tsc > tsd);
 }
+
+BOOST_AUTO_TEST_CASE(test_time_large_ticks_to_time_spec)
+{
+    std::cout << "sizeof(time_t) " << sizeof(time_t) << std::endl;
+    const boost::uint64_t ticks0 = boost::uint64_t(100e6*1360217663.739296);
+    const uhd::time_spec_t t0 = uhd::time_spec_t::from_ticks(ticks0, 100e6);
+    std::cout << "t0.get_real_secs() " << t0.get_real_secs() << std::endl;
+    std::cout << "t0.get_full_secs() " << t0.get_full_secs() << std::endl;
+    std::cout << "t0.get_frac_secs() " << t0.get_frac_secs() << std::endl;
+    BOOST_CHECK_EQUAL(t0.get_full_secs(), time_t(1360217663));
+}
+
+BOOST_AUTO_TEST_CASE(test_time_error_irrational_rate)
+{
+    static const double rate = 1625e3/6;
+    const long long tick_in = 23423436291667;
+    const uhd::time_spec_t ts = uhd::time_spec_t::from_ticks(tick_in, rate);
+    const long long tick_out = ts.to_ticks(rate);
+    const long long err = tick_in - tick_out;
+
+    std::cout << std::setprecision(18);
+    std::cout << "time ............ " << ts.get_real_secs() << std::endl;
+    std::cout << "tick in ......... " << tick_in << std::endl;
+    std::cout << "tick out ........ " << tick_out << std::endl;
+    std::cout << "tick error ...... " << err << std::endl;
+    std::cout << std::endl;
+
+    BOOST_CHECK_EQUAL(err, (long long)(0));
+}