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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifdef JS_HAS_TEMPORAL_API
# include <cmath>
# include <stdint.h>
# include "builtin/temporal/Int128.h"
# include "builtin/temporal/Temporal.h"
# include "jsapi-tests/tests.h"
using namespace js::temporal;
// Simple test using numerators and denominators where the result can be
// computed through standard double division.
BEGIN_TEST(testFraction_simple) {
int64_t numerators[] = {
0, 1, 2, 10, 100, INT32_MIN, INT32_MAX,
};
int64_t denominators[] = {
1, 2, 3, 10, 100, 1000,
};
for (auto numerator : numerators) {
for (auto denominator : denominators) {
double result = double(numerator) / double(denominator);
CHECK_EQUAL(FractionToDouble(numerator, denominator), result);
CHECK_EQUAL(FractionToDouble(Int128{numerator}, Int128{denominator}),
result);
CHECK_EQUAL(FractionToDouble(-numerator, denominator),
std::copysign(result, -numerator));
CHECK_EQUAL(FractionToDouble(-Int128{numerator}, Int128{denominator}),
std::copysign(result, -numerator));
}
}
return true;
}
END_TEST(testFraction_simple)
// Complex test with values exceeding Number.MAX_SAFE_INTEGER.
BEGIN_TEST(testFraction_complex) {
struct {
int64_t numerator;
int64_t denominator;
double result;
} values[] = {
// Number.MAX_SAFE_INTEGER
{9007199254740991, 2, 4503599627370495.5},
{9007199254740992, 2, 4503599627370496},
{9007199254740993, 2, 4503599627370496.5},
{INT64_MAX, 2, 4611686018427387903.5},
{INT64_MIN, 2, -4611686018427387904.0},
};
for (auto [numerator, denominator, result] : values) {
CHECK_EQUAL(FractionToDouble(numerator, denominator), result);
CHECK_EQUAL(FractionToDouble(Int128{numerator}, Int128{denominator}),
result);
}
return true;
}
END_TEST(testFraction_complex)
// Complex test with Int128 values exceeding Number.MAX_SAFE_INTEGER.
BEGIN_TEST(testFraction_complex_int128) {
struct {
Int128 numerator;
Int128 denominator;
double result;
} values[] = {
// Divide 1 by a growing divisor.
{Int128{1}, Int128{1'000}, 0.001},
{Int128{1}, Int128{1'000'000}, 0.000'001},
{Int128{1}, Int128{1'000'000'000}, 0.000'000'001},
{Int128{1}, Int128{1'000'000'000'000}, 0.000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000}, 0.000'000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000'000}, 0.000'000'000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000'000} * Int128{1'000},
0.000'000'000'000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000'000} * Int128{1'000'000},
0.000'000'000'000'000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000},
0.000'000'000'000'000'000'000'000'001},
{Int128{1}, Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000},
0.000'000'000'000'000'000'000'000'000'001},
{Int128{1},
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000'000},
0.000'000'000'000'000'000'000'000'000'000'001},
{Int128{1},
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000'000'000},
0.000'000'000'000'000'000'000'000'000'000'000'001},
// Divide a number not representable as an int64.
{Int128{0x8000'0000} << 64, Int128{1'000},
39614081257132168796771975.1680},
{Int128{0x8000'0000} << 64, Int128{1'000'000},
39614081257132168796771.9751680},
{Int128{0x8000'0000} << 64, Int128{1'000'000'000},
39614081257132168796.7719751680},
{Int128{0x8000'0000} << 64, Int128{1'000'000'000'000},
39614081257132168.7967719751680},
{Int128{0x8000'0000} << 64, Int128{1'000'000'000'000'000},
39614081257132.1687967719751680},
{Int128{0x8000'0000} << 64, Int128{1'000'000'000'000'000'000},
39614081257.1321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000},
39614081.2571321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000'000},
39614.0812571321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000},
39.6140812571321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000},
0.0396140812571321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000'000},
0.0000396140812571321687967719751680},
{Int128{0x8000'0000} << 64,
Int128{1'000'000'000'000'000'000} * Int128{1'000'000'000'000'000'000},
0.0000000396140812571321687967719751680},
// Test divisor which isn't a multiple of ten.
{Int128{0x8000'0000} << 64, Int128{2}, 19807040628566084398385987584.0},
{Int128{0x8000'0000} << 64, Int128{3}, 13204693752377389598923991722.666},
{Int128{0x8000'0000} << 64, Int128{3'333},
11885412918431493788410433.5937},
{Int128{0x8000'0000} << 64, Int128{3'333'333},
11884225565562207195252.3120756},
{Int128{0x8000'0000} << 64, Int128{3'333'333'333},
11884224378328073076.864399858},
{Int128{0x8000'0000} << 64, Int128{3'333'333'333'333},
11884224377140839.0614693066343},
{Int128{0x8000'0000} << 64, Int128{3'333'333'333'333'333},
11884224377139.6518274540302643},
{Int128{0x8000'0000} << 64, Int128{3'333'333'333'333'333'333},
11884224377.1396506402200149881},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000}) + Int128{333},
11884224.3771396506390327809728},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000'000}) +
Int128{333'333},
11884.2243771396506390315937388},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000'000'000}) +
Int128{333'333'333},
11.884224377139650639031592551588422437713965063903159255158842243},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000'000'000'000}) +
Int128{333'333'333'333},
0.0118842243771396506390315925504},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000'000'000'000'000}) +
Int128{333'333'333'333'333},
0.0000118842243771396506390315925504},
{Int128{0x8000'0000} << 64,
(Int128{3'333'333'333'333'333'333} * Int128{1'000'000'000'000'000'000}) +
Int128{333'333'333'333'333'333},
0.0000000118842243771396506390315925504},
};
for (auto [numerator, denominator, result] : values) {
CHECK_EQUAL(FractionToDouble(numerator, denominator), result);
}
return true;
}
END_TEST(testFraction_complex_int128)
#endif
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