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https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-08-08 21:49:06 -04:00
481 lines
11 KiB
C++
481 lines
11 KiB
C++
#include "g_libntptest.h"
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#include "g_timestructs.h"
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extern "C" {
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#include <math.h>
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#include "timevalops.h"
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}
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#include <string>
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#include <sstream>
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using namespace timeStruct;
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class timevalTest : public libntptest {
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protected:
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static u_int32 my_tick_to_tsf(u_int32 ticks);
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static u_int32 my_tsf_to_tick(u_int32 tsf);
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// that's it...
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struct lfpfracdata {
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long usec;
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u_int32 frac;
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};
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static const lfpfracdata fdata[];
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};
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u_int32
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timevalTest::my_tick_to_tsf(
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u_int32 ticks
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)
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{
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// convert microseconds to l_fp fractional units, using double
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// precision float calculations or, if available, 64bit integer
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// arithmetic. This should give the precise fraction, rounded to
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// the nearest representation.
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#ifdef HAVE_U_INT64
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return u_int32(((u_int64(ticks) << 32) + 500000) / 1000000);
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#else
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return u_int32(double(ticks) * 4294.967296 + 0.5);
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#endif
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// And before you ask: if ticks >= 1000000, the result is
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// truncated nonsense, so don't use it out-of-bounds.
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}
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u_int32
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timevalTest::my_tsf_to_tick(
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u_int32 tsf
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)
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{
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// Inverse operation: converts fraction to microseconds.
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#ifdef HAVE_U_INT64
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return u_int32((u_int64(tsf) * 1000000 + 0x80000000) >> 32);
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#else
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return u_int32(double(tsf) / 4294.967296 + 0.5);
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#endif
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// Beware: The result might be 10^6 due to rounding!
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}
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const timevalTest::lfpfracdata timevalTest::fdata [] = {
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{ 0, 0x00000000 }, { 7478, 0x01ea1405 },
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{ 22077, 0x05a6d699 }, { 125000, 0x20000000 },
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{ 180326, 0x2e29d841 }, { 207979, 0x353e1c9b },
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{ 250000, 0x40000000 }, { 269509, 0x44fe8ab5 },
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{ 330441, 0x5497c808 }, { 333038, 0x5541fa76 },
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{ 375000, 0x60000000 }, { 394734, 0x650d4995 },
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{ 446327, 0x72427c7c }, { 500000, 0x80000000 },
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{ 517139, 0x846338b4 }, { 571953, 0x926b8306 },
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{ 587353, 0x965cc426 }, { 625000, 0xa0000000 },
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{ 692136, 0xb12fd32c }, { 750000, 0xc0000000 },
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{ 834068, 0xd5857aff }, { 848454, 0xd9344806 },
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{ 854222, 0xdaae4b02 }, { 861465, 0xdc88f862 },
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{ 875000, 0xe0000000 }, { 910661, 0xe921144d },
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{ 922162, 0xec12cf10 }, { 942190, 0xf1335d25 }
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};
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// ---------------------------------------------------------------------
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// test support stuff - part1
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// ---------------------------------------------------------------------
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TEST_F(timevalTest, Helpers1) {
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timeval_wrap x;
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for (x.V.tv_sec = -2; x.V.tv_sec < 3; x.V.tv_sec++) {
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x.V.tv_usec = -1;
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ASSERT_FALSE(x.valid());
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x.V.tv_usec = 0;
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ASSERT_TRUE(x.valid());
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x.V.tv_usec = 999999;
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ASSERT_TRUE(x.valid());
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x.V.tv_usec = 1000000;
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ASSERT_FALSE(x.valid());
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}
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}
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//----------------------------------------------------------------------
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// test normalisation
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//----------------------------------------------------------------------
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TEST_F(timevalTest, Normalise) {
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for (long ns = -2000000000; ns <= 2000000000; ns += 10000000) {
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timeval_wrap x(0, ns);
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x = normalize_tval(x);
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ASSERT_TRUE(x.valid());
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}
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}
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//----------------------------------------------------------------------
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// test classification
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//----------------------------------------------------------------------
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TEST_F(timevalTest, SignNoFrac) {
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// sign test, no fraction
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 0);
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int E = (i > 0) - (i < 0);
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int r = test_tval(a);
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ASSERT_EQ(E, r);
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}
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}
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TEST_F(timevalTest, SignWithFrac) {
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// sign test, with fraction
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 10);
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int E = (i >= 0) - (i < 0);
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int r = test_tval(a);
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ASSERT_EQ(E, r);
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}
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}
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//----------------------------------------------------------------------
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// test compare
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//----------------------------------------------------------------------
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TEST_F(timevalTest, CmpFracEQ) {
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// fractions are equal
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 200);
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timeval_wrap b(j, 200);
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int E = (i > j) - (i < j);
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int r = cmp_tval_denorm(a, b);
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ASSERT_EQ(E, r);
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}
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}
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TEST_F(timevalTest, CmpFracGT) {
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// fraction a bigger fraction b
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a( i , 999800);
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timeval_wrap b( j , 200);
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int E = (i >= j) - (i < j);
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int r = cmp_tval_denorm(a, b);
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ASSERT_EQ(E, r);
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}
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}
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TEST_F(timevalTest, CmpFracLT) {
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// fraction a less fraction b
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 200);
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timeval_wrap b(j, 999800);
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int E = (i > j) - (i <= j);
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int r = cmp_tval_denorm(a, b);
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ASSERT_EQ(E, r);
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}
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}
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//----------------------------------------------------------------------
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// Test addition (sum)
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//----------------------------------------------------------------------
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TEST_F(timevalTest, AddFullNorm) {
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 200);
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timeval_wrap b(j, 400);
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timeval_wrap E(i + j, 200 + 400);
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timeval_wrap c;
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c = add_tval(a, b);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, AddFullOflow1) {
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 200);
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timeval_wrap b(j, 999900);
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timeval_wrap E(i + j + 1, 100);
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timeval_wrap c;
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c = add_tval(a, b);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, AddUsecNorm) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 200);
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timeval_wrap E(i, 600);
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timeval_wrap c;
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c = add_tval_us(a, 600 - 200);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, AddUsecOflow1) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 200);
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timeval_wrap E(i + 1, 100);
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timeval_wrap c;
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c = add_tval_us(a, MICROSECONDS - 100);
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ASSERT_EQ(E, c);
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}
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}
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//----------------------------------------------------------------------
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// test subtraction (difference)
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//----------------------------------------------------------------------
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TEST_F(timevalTest, SubFullNorm) {
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 600);
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timeval_wrap b(j, 400);
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timeval_wrap E(i - j, 600 - 400);
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timeval_wrap c;
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c = sub_tval(a, b);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, SubFullOflow) {
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for (int i = -4; i <= 4; ++i)
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for (int j = -4; j <= 4; ++j) {
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timeval_wrap a(i, 100);
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timeval_wrap b(j, 999900);
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timeval_wrap E(i - j - 1, 200);
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timeval_wrap c;
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c = sub_tval(a, b);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, SubUsecNorm) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 600);
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timeval_wrap E(i, 200);
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timeval_wrap c;
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c = sub_tval_us(a, 600 - 200);
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ASSERT_EQ(E, c);
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}
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}
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TEST_F(timevalTest, SubUsecOflow) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 100);
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timeval_wrap E(i - 1, 200);
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timeval_wrap c;
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c = sub_tval_us(a, MICROSECONDS - 100);
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ASSERT_EQ(E, c);
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}
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}
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//----------------------------------------------------------------------
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// test negation
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//----------------------------------------------------------------------
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TEST_F(timevalTest, Neg) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 100);
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timeval_wrap b;
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timeval_wrap c;
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b = neg_tval(a);
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c = add_tval(a, b);
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ASSERT_EQ(0, test_tval(c));
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}
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}
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//----------------------------------------------------------------------
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// test abs value
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//----------------------------------------------------------------------
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TEST_F(timevalTest, AbsNoFrac) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 0);
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timeval_wrap b;
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b = abs_tval(a);
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ASSERT_EQ((i != 0), test_tval(b));
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}
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}
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TEST_F(timevalTest, AbsWithFrac) {
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for (int i = -4; i <= 4; ++i) {
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timeval_wrap a(i, 100);
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timeval_wrap b;
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b = abs_tval(a);
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ASSERT_EQ(1, test_tval(b));
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}
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}
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// ---------------------------------------------------------------------
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// test support stuff -- part 2
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// ---------------------------------------------------------------------
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TEST_F(timevalTest, Helpers2) {
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AssertTimevalClose isClose(0, 2);
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timeval_wrap x, y;
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for (x.V.tv_sec = -2; x.V.tv_sec < 3; x.V.tv_sec++)
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for (x.V.tv_usec = 1;
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x.V.tv_usec < 1000000;
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x.V.tv_usec += 499999) {
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for (long i = -4; i < 5; i++) {
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y = x;
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y.V.tv_usec += i;
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if (i >= -2 && i <= 2)
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ASSERT_PRED_FORMAT2(isClose, x, y);
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else
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ASSERT_PRED_FORMAT2(!isClose, x, y);
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}
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}
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}
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// and the global predicate instances we're using here
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static AssertFpClose FpClose(0, 1);
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static AssertTimevalClose TimevalClose(0, 1);
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//----------------------------------------------------------------------
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// conversion to l_fp
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//----------------------------------------------------------------------
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TEST_F(timevalTest, ToLFPbittest) {
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for (u_int32 i = 0; i < 1000000; i++) {
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timeval_wrap a(1, i);
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l_fp_wrap E(1, my_tick_to_tsf(i));
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l_fp_wrap r;
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r = tval_intv_to_lfp(a);
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ASSERT_PRED_FORMAT2(FpClose, E, r);
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}
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}
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TEST_F(timevalTest, ToLFPrelPos) {
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for (int i = 0; i < COUNTOF(fdata); i++) {
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timeval_wrap a(1, fdata[i].usec);
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l_fp_wrap E(1, fdata[i].frac);
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l_fp_wrap r;
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r = tval_intv_to_lfp(a);
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ASSERT_PRED_FORMAT2(FpClose, E, r);
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}
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}
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TEST_F(timevalTest, ToLFPrelNeg) {
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for (int i = 0; i < COUNTOF(fdata); i++) {
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timeval_wrap a(-1, fdata[i].usec);
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l_fp_wrap E(~0, fdata[i].frac);
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l_fp_wrap r;
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r = tval_intv_to_lfp(a);
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ASSERT_PRED_FORMAT2(FpClose, E, r);
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}
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}
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TEST_F(timevalTest, ToLFPabs) {
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for (int i = 0; i < COUNTOF(fdata); i++) {
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timeval_wrap a(1, fdata[i].usec);
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l_fp_wrap E(1 + JAN_1970, fdata[i].frac);
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l_fp_wrap r;
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r = tval_stamp_to_lfp(a);
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ASSERT_PRED_FORMAT2(FpClose, E, r);
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}
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}
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//----------------------------------------------------------------------
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// conversion from l_fp
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//----------------------------------------------------------------------
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TEST_F(timevalTest, FromLFPbittest) {
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// Not *exactly* a bittest, because 2**32 tests would take a
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// really long time even on very fast machines! So we do test
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// every 1000 fractional units.
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for (u_int32 tsf = 0; tsf < ~u_int32(1000); tsf += 1000) {
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timeval_wrap E(1, my_tsf_to_tick(tsf));
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l_fp_wrap a(1, tsf);
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timeval_wrap r;
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r = lfp_intv_to_tval(a);
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// The conversion might be off by one microsecond when
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// comparing to calculated value.
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ASSERT_PRED_FORMAT2(TimevalClose, E, r);
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}
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}
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TEST_F(timevalTest, FromLFPrelPos) {
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for (int i = 0; i < COUNTOF(fdata); i++) {
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l_fp_wrap a(1, fdata[i].frac);
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timeval_wrap E(1, fdata[i].usec);
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timeval_wrap r;
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r = lfp_intv_to_tval(a);
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ASSERT_PRED_FORMAT2(TimevalClose, E, r);
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}
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}
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TEST_F(timevalTest, FromLFPrelNeg) {
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for (int i = 0; i < COUNTOF(fdata); i++) {
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l_fp_wrap a(~0, fdata[i].frac);
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timeval_wrap E(-1, fdata[i].usec);
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timeval_wrap r;
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r = lfp_intv_to_tval(a);
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ASSERT_PRED_FORMAT2(TimevalClose, E, r);
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}
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}
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// usec -> frac -> usec roundtrip, using a prime start and increment
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TEST_F(timevalTest, LFProundtrip) {
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for (int32_t t = -1; t < 2; ++t)
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for (u_int32 i = 5; i < 1000000; i+=11) {
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timeval_wrap E(t, i);
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l_fp_wrap a;
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timeval_wrap r;
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a = tval_intv_to_lfp(E);
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r = lfp_intv_to_tval(a);
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ASSERT_EQ(E, r);
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}
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}
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//----------------------------------------------------------------------
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// string formatting
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//----------------------------------------------------------------------
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TEST_F(timevalTest, ToString) {
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static const struct {
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time_t sec;
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long usec;
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const char * repr;
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} data [] = {
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{ 0, 0, "0.000000" },
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{ 2, 0, "2.000000" },
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{-2, 0, "-2.000000" },
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{ 0, 1, "0.000001" },
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{ 0,-1, "-0.000001" },
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{ 1,-1, "0.999999" },
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{-1, 1, "-0.999999" },
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{-1,-1, "-1.000001" },
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};
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for (int i = 0; i < COUNTOF(data); ++i) {
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timeval_wrap a(data[i].sec, data[i].usec);
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std::string E(data[i].repr);
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std::string r(tvaltoa(a));
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ASSERT_EQ(E, r);
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}
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}
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// -*- EOF -*-
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