1 #include "g_libntptest.h"
2 #include "g_timestructs.h"
6 #include "timespecops.h"
12 using namespace timeStruct;
14 class timespecTest : public libntptest {
16 static u_int32 my_tick_to_tsf(u_int32 ticks);
17 static u_int32 my_tsf_to_tick(u_int32 tsf);
24 static const lfpfracdata fdata[];
28 timespecTest::my_tick_to_tsf(
32 // convert nanoseconds to l_fp fractional units, using double
33 // precision float calculations or, if available, 64bit integer
34 // arithmetic. This should give the precise fraction, rounded to
35 // the nearest representation.
37 return u_int32(((u_int64(ticks) << 32) + 500000000) / 1000000000);
39 return u_int32(double(ticks) * 4.294967296 + 0.5);
41 // And before you ask: if ticks >= 1000000000, the result is
42 // truncated nonsense, so don't use it out-of-bounds.
46 timespecTest::my_tsf_to_tick(
50 // Inverse operation: converts fraction to microseconds.
52 return u_int32((u_int64(tsf) * 1000000000 + 0x80000000) >> 32);
54 return u_int32(double(tsf) / 4.294967296 + 0.5);
56 // Beware: The result might be 10^9 due to rounding!
59 const timespecTest::lfpfracdata timespecTest::fdata [] = {
60 { 0, 0x00000000 }, { 2218896, 0x00916ae6 },
61 { 16408100, 0x0433523d }, { 125000000, 0x20000000 },
62 { 250000000, 0x40000000 }, { 287455871, 0x4996b53d },
63 { 375000000, 0x60000000 }, { 500000000, 0x80000000 },
64 { 518978897, 0x84dbcd0e }, { 563730222, 0x90509fb3 },
65 { 563788007, 0x9054692c }, { 583289882, 0x95527c57 },
66 { 607074509, 0x9b693c2a }, { 625000000, 0xa0000000 },
67 { 645184059, 0xa52ac851 }, { 676497788, 0xad2ef583 },
68 { 678910895, 0xadcd1abb }, { 679569625, 0xadf84663 },
69 { 690926741, 0xb0e0932d }, { 705656483, 0xb4a5e73d },
70 { 723553854, 0xb93ad34c }, { 750000000, 0xc0000000 },
71 { 763550253, 0xc3780785 }, { 775284917, 0xc6791284 },
72 { 826190764, 0xd3813ce8 }, { 875000000, 0xe0000000 },
73 { 956805507, 0xf4f134a9 }, { 982570733, 0xfb89c16c }
77 // ---------------------------------------------------------------------
78 // test support stuff -- part 1
79 // ---------------------------------------------------------------------
81 TEST_F(timespecTest, Helpers1) {
84 for (x.V.tv_sec = -2; x.V.tv_sec < 3; x.V.tv_sec++) {
86 ASSERT_FALSE(x.valid());
88 ASSERT_TRUE(x.valid());
89 x.V.tv_nsec = 999999999;
90 ASSERT_TRUE(x.valid());
91 x.V.tv_nsec = 1000000000;
92 ASSERT_FALSE(x.valid());
96 //----------------------------------------------------------------------
98 //----------------------------------------------------------------------
100 TEST_F(timespecTest, Normalise) {
101 for (long ns = -2000000000; ns <= 2000000000; ns += 10000000) {
102 timespec_wrap x(0, ns);
104 x = normalize_tspec(x);
105 ASSERT_TRUE(x.valid());
109 //----------------------------------------------------------------------
110 // test classification
111 //----------------------------------------------------------------------
113 TEST_F(timespecTest, SignNoFrac) {
114 // sign test, no fraction
115 for (int i = -4; i <= 4; ++i) {
116 timespec_wrap a(i, 0);
117 int E = (i > 0) - (i < 0);
118 int r = test_tspec(a);
124 TEST_F(timespecTest, SignWithFrac) {
125 // sign test, with fraction
126 for (int i = -4; i <= 4; ++i) {
127 timespec_wrap a(i, 10);
128 int E = (i >= 0) - (i < 0);
129 int r = test_tspec(a);
134 //----------------------------------------------------------------------
136 //----------------------------------------------------------------------
137 TEST_F(timespecTest, CmpFracEQ) {
138 // fractions are equal
139 for (int i = -4; i <= 4; ++i)
140 for (int j = -4; j <= 4; ++j) {
141 timespec_wrap a( i , 200);
142 timespec_wrap b( j , 200);
143 int E = (i > j) - (i < j);
144 int r = cmp_tspec_denorm(a, b);
149 TEST_F(timespecTest, CmpFracGT) {
150 // fraction a bigger fraction b
151 for (int i = -4; i <= 4; ++i)
152 for (int j = -4; j <= 4; ++j) {
153 timespec_wrap a(i, 999999800);
154 timespec_wrap b(j, 200);
155 int E = (i >= j) - (i < j);
156 int r = cmp_tspec_denorm(a, b);
161 TEST_F(timespecTest, CmpFracLT) {
162 // fraction a less fraction b
163 for (int i = -4; i <= 4; ++i)
164 for (int j = -4; j <= 4; ++j) {
165 timespec_wrap a(i, 200);
166 timespec_wrap b(j, 999999800);
167 int E = (i > j) - (i <= j);
168 int r = cmp_tspec_denorm(a, b);
173 //----------------------------------------------------------------------
174 // Test addition (sum)
175 //----------------------------------------------------------------------
177 TEST_F(timespecTest, AddFullNorm) {
178 for (int i = -4; i <= 4; ++i)
179 for (int j = -4; j <= 4; ++j) {
180 timespec_wrap a(i, 200);
181 timespec_wrap b(j, 400);
182 timespec_wrap E(i + j, 200 + 400);
190 TEST_F(timespecTest, AddFullOflow1) {
191 for (int i = -4; i <= 4; ++i)
192 for (int j = -4; j <= 4; ++j) {
193 timespec_wrap a(i, 200);
194 timespec_wrap b(j, 999999900);
195 timespec_wrap E(i + j + 1, 100);
203 TEST_F(timespecTest, AddNsecNorm) {
204 for (int i = -4; i <= 4; ++i) {
205 timespec_wrap a(i, 200);
206 timespec_wrap E(i, 600);
209 c = add_tspec_ns(a, 600 - 200);
214 TEST_F(timespecTest, AddNsecOflow1) {
215 for (int i = -4; i <= 4; ++i) {
216 timespec_wrap a(i, 200);
217 timespec_wrap E(i + 1, 100);
220 c = add_tspec_ns(a, NANOSECONDS - 100);
225 //----------------------------------------------------------------------
226 // test subtraction (difference)
227 //----------------------------------------------------------------------
229 TEST_F(timespecTest, SubFullNorm) {
230 for (int i = -4; i <= 4; ++i)
231 for (int j = -4; j <= 4; ++j) {
232 timespec_wrap a( i , 600);
233 timespec_wrap b( j , 400);
234 timespec_wrap E(i-j, 200);
242 TEST_F(timespecTest, SubFullOflow) {
243 for (int i = -4; i <= 4; ++i)
244 for (int j = -4; j <= 4; ++j) {
245 timespec_wrap a( i , 100);
246 timespec_wrap b( j , 999999900);
247 timespec_wrap E(i-j-1, 200);
255 TEST_F(timespecTest, SubNsecNorm) {
256 for (int i = -4; i <= 4; ++i) {
257 timespec_wrap a(i, 600);
258 timespec_wrap E(i, 200);
261 c = sub_tspec_ns(a, 600 - 200);
266 TEST_F(timespecTest, SubNsecOflow) {
267 for (int i = -4; i <= 4; ++i) {
268 timespec_wrap a( i , 100);
269 timespec_wrap E(i-1, 200);
272 c = sub_tspec_ns(a, NANOSECONDS - 100);
277 //----------------------------------------------------------------------
279 //----------------------------------------------------------------------
281 TEST_F(timespecTest, Neg) {
282 for (int i = -4; i <= 4; ++i) {
283 timespec_wrap a(i, 100);
289 ASSERT_EQ(0, test_tspec(c));
293 //----------------------------------------------------------------------
295 //----------------------------------------------------------------------
297 TEST_F(timespecTest, AbsNoFrac) {
298 for (int i = -4; i <= 4; ++i) {
299 timespec_wrap a(i , 0);
303 ASSERT_EQ((i != 0), test_tspec(b));
307 TEST_F(timespecTest, AbsWithFrac) {
308 for (int i = -4; i <= 4; ++i) {
309 timespec_wrap a(i, 100);
313 ASSERT_EQ(1, test_tspec(b));
317 // ---------------------------------------------------------------------
318 // test support stuff -- part 2
319 // ---------------------------------------------------------------------
321 TEST_F(timespecTest, Helpers2) {
322 AssertTimespecClose isClose(0, 2);
325 for (x.V.tv_sec = -2; x.V.tv_sec < 3; x.V.tv_sec++)
326 for (x.V.tv_nsec = 1;
327 x.V.tv_nsec < 1000000000;
328 x.V.tv_nsec += 499999999) {
329 for (long i = -4; i < 5; i++) {
332 if (i >= -2 && i <= 2)
333 ASSERT_PRED_FORMAT2(isClose, x, y);
335 ASSERT_PRED_FORMAT2(!isClose, x, y);
340 // global predicate instances we're using here
341 static AssertFpClose FpClose(0, 1);
342 static AssertTimespecClose TimespecClose(0, 2);
344 //----------------------------------------------------------------------
345 // conversion to l_fp
346 //----------------------------------------------------------------------
348 TEST_F(timespecTest, ToLFPbittest) {
349 for (u_int32 i = 0; i < 1000000000; i+=1000) {
350 timespec_wrap a(1, i);
351 l_fp_wrap E(1, my_tick_to_tsf(i));
354 r = tspec_intv_to_lfp(a);
355 ASSERT_PRED_FORMAT2(FpClose, E, r);
359 TEST_F(timespecTest, ToLFPrelPos) {
360 for (int i = 0; i < COUNTOF(fdata); i++) {
361 timespec_wrap a(1, fdata[i].nsec);
362 l_fp_wrap E(1, fdata[i].frac);
365 r = tspec_intv_to_lfp(a);
370 TEST_F(timespecTest, ToLFPrelNeg) {
371 for (int i = 0; i < COUNTOF(fdata); i++) {
372 timespec_wrap a(-1, fdata[i].nsec);
373 l_fp_wrap E(~0, fdata[i].frac);
376 r = tspec_intv_to_lfp(a);
381 TEST_F(timespecTest, ToLFPabs) {
382 for (int i = 0; i < COUNTOF(fdata); i++) {
383 timespec_wrap a(1, fdata[i].nsec);
384 l_fp_wrap E(1 + JAN_1970, fdata[i].frac);
387 r = tspec_stamp_to_lfp(a);
392 //----------------------------------------------------------------------
393 // conversion from l_fp
394 //----------------------------------------------------------------------
395 TEST_F(timespecTest, FromLFPbittest) {
396 // Not *exactly* a bittest, because 2**32 tests would take a
397 // really long time even on very fast machines! So we do test
398 // every 1000 fractional units.
399 for (u_int32 tsf = 0; tsf < ~u_int32(1000); tsf += 1000) {
400 timespec_wrap E(1, my_tsf_to_tick(tsf));
404 r = lfp_intv_to_tspec(a);
405 // The conversion might be off by one nanosecond when
406 // comparing to calculated value.
407 ASSERT_PRED_FORMAT2(TimespecClose, E, r);
411 TEST_F(timespecTest, FromLFPrelPos) {
412 for (int i = 0; i < COUNTOF(fdata); i++) {
413 l_fp_wrap a(1, fdata[i].frac);
414 timespec_wrap E(1, fdata[i].nsec);
417 r = lfp_intv_to_tspec(a);
418 ASSERT_PRED_FORMAT2(TimespecClose, E, r);
422 TEST_F(timespecTest, FromLFPrelNeg) {
423 for (int i = 0; i < COUNTOF(fdata); i++) {
424 l_fp_wrap a(~0, fdata[i].frac);
425 timespec_wrap E(-1, fdata[i].nsec);
428 r = lfp_intv_to_tspec(a);
429 ASSERT_PRED_FORMAT2(TimespecClose, E, r);
434 // nsec -> frac -> nsec roundtrip, using a prime start and increment
435 TEST_F(timespecTest, LFProundtrip) {
436 for (int32_t t = -1; t < 2; ++t)
437 for (u_int32 i = 4999; i < 1000000000; i+=10007) {
438 timespec_wrap E(t, i);
442 a = tspec_intv_to_lfp(E);
443 r = lfp_intv_to_tspec(a);
448 //----------------------------------------------------------------------
450 //----------------------------------------------------------------------
452 TEST_F(timespecTest, ToString) {
453 static const struct {
458 { 0, 0, "0.000000000" },
459 { 2, 0, "2.000000000" },
460 {-2, 0, "-2.000000000" },
461 { 0, 1, "0.000000001" },
462 { 0,-1, "-0.000000001" },
463 { 1,-1, "0.999999999" },
464 {-1, 1, "-0.999999999" },
465 {-1,-1, "-1.000000001" },
467 for (int i = 0; i < COUNTOF(data); i++) {
468 timespec_wrap a(data[i].sec, data[i].nsec);
469 std::string E(data[i].repr);
470 std::string r(tspectoa(a));