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MikeMcl_decimal.js
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Merge pull request #88 from luciavelasco/fix-toNearest-rounding

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Fix toNearest rounding
pull/122/head
Michael M 7 years ago committed by GitHub
parent 875f6d0f7a caed629d5a
commit c99bdef459
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 145 additions and 66 deletions
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7
decimal.js
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@ -2150,7 +2150,11 @@
rm = Ctor.rounding; rm = Ctor.rounding;
} else { } else {
y = new Ctor(y); y = new Ctor(y);
if (rm !== void 0) checkInt32(rm, 0, 8); if (rm === void 0) {
rm = Ctor.rounding;
} else {
checkInt32(rm, 0, 8);
}
// If x is not finite, return x if y is not NaN, else NaN. // If x is not finite, return x if y is not NaN, else NaN.
if (!x.d) return y.s ? x : y; if (!x.d) return y.s ? x : y;
@ -2165,7 +2169,6 @@
// If y is not zero, calculate the nearest multiple of y to x. // If y is not zero, calculate the nearest multiple of y to x.
if (y.d[0]) { if (y.d[0]) {
external = false; external = false;
if (rm < 4) rm = [4, 5, 7, 8][rm];
x = divide(x, y, 0, rm, 1).times(y); x = divide(x, y, 0, rm, 1).times(y);
external = true; external = true;
finalise(x); finalise(x);

204
test/modules/toNearest.js
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@ -27,8 +27,7 @@ T('toNearest', function () {
t(!isMinusZero(new Decimal(1).toNearest(-3))); t(!isMinusZero(new Decimal(1).toNearest(-3)));
t( isMinusZero(new Decimal(-1).toNearest(-3))); t( isMinusZero(new Decimal(-1).toNearest(-3)));
t = function (expected, n, v, sd, rm) { t = function (expected, n, v, rm) {
if (sd) Decimal.precision = sd;
T.assertEqual(expected, new Decimal(n).toNearest(v, rm).valueOf()); T.assertEqual(expected, new Decimal(n).toNearest(v, rm).valueOf());
} }
@ -67,9 +66,9 @@ T('toNearest', function () {
t('0', 1, -3); t('0', 1, -3);
t('-0', -1, -3); t('-0', -1, -3);
t('3', 1.5, -3, 20, 0); t('3', 1.5, -3, 0);
t('-0', -1.5, -3, 20, 1); t('-0', -1.5, -3, 1);
t('-3', -1.5, -3, 20, 2); t('-3', -1.5, -3, 2);
t('123', 123.456); t('123', 123.456);
t('123', 123.456, 1); t('123', 123.456, 1);
@ -87,68 +86,145 @@ T('toNearest', function () {
t('123.46', 123.456, '-0.02'); t('123.46', 123.456, '-0.02');
t('123.456', 123.456, '-0.002'); t('123.456', 123.456, '-0.002');
t('83105511540', '83105511539.5', 1, 11, 4); t('83105511540', '83105511539.5', 1, 4);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 11, 4); t('83105511539', '83105511539.499999999999999999999999999999', 1, 4);
t('83105511539', '83105511539.5', '1', 11, 5); t('83105511539', '83105511539.5', '1', 5);
t('83105511540', '83105511539.5000000000000000000001', 1, 11, 5); t('83105511540', '83105511539.5000000000000000000001', 1, 5);
t('83105511540', '83105511539.5', new Decimal(1), 3, 4); Decimal.precision = 3;
t('83105511539', '83105511539.499999999999999999999999999999', 1, 3, 4);
t('83105511539', '83105511539.5', new Decimal('1'), 3, 5); t('83105511540', '83105511539.5', new Decimal(1), 4);
t('83105511540', '83105511539.5000000000000000000001', 1, 3, 5); t('83105511539', '83105511539.499999999999999999999999999999', 1, 4);
t('83105511539', '83105511539.5', new Decimal('1'), 5);
t('83105511540', '83105511539.5', Decimal.ONE, 30, 4); t('83105511540', '83105511539.5000000000000000000001', 1, 5);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 4);
t('83105511539', '83105511539.5', 1, 30, 5); Decimal.precision = 20;
t('83105511540', '83105511539.5000000000000000000001', 1, 30, 5);
t('83105511540', '83105511539.5', -1, 4);
t('83105511540', '83105511539.5', -1, 11, 4); t('83105511539', '83105511539.499999999999999999999999999999', -1, 4);
t('83105511539', '83105511539.499999999999999999999999999999', -1, 11, 4); t('83105511539', '83105511539.5', '-1', 5);
t('83105511539', '83105511539.5', '-1', 11, 5); t('83105511540', '83105511539.5000000000000000000001', -1, 5);
t('83105511540', '83105511539.5000000000000000000001', -1, 11, 5);
t('-83105511540', '-83105511539.5', new Decimal(-1), 4);
t('83105511540', '83105511539.5', new Decimal(-1), 3, 4); t('-83105511539', '-83105511539.499999999999999999999999999999', 1, 4);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 3, 4); t('-83105511539', '-83105511539.5', new Decimal('-1'), 5);
t('83105511539', '83105511539.5', new Decimal('-1'), 3, 5); t('-83105511540', '-83105511539.5000000000000000000001', -1, 5);
t('83105511540', '83105511539.5000000000000000000001', -1, 3, 5);
t('83105511540', '83105511539.5', 1, 0);
t('83105511540', '83105511539.5', 1, 30, 0); t('83105511539', '83105511539.5', 1, 1);
t('83105511539', '83105511539.5', 1, 30, 1); t('83105511540', '83105511539.5', 1, 2);
t('83105511540', '83105511539.5', 1, 30, 2); t('83105511539', '83105511539.5', 1, 3);
t('83105511539', '83105511539.5', 1, 30, 3); t('83105511540', '83105511539.5', 1, 4);
t('83105511540', '83105511539.5', 1, 30, 4); t('83105511539', '83105511539.5', 1, 5);
t('83105511539', '83105511539.5', 1, 30, 5); t('83105511540', '83105511539.5', 1, 6);
t('83105511540', '83105511539.5', 1, 30, 6); t('83105511540', '83105511539.5', 1, 7);
t('83105511540', '83105511539.5', 1, 30, 7); t('83105511539', '83105511539.5', 1, 8);
t('83105511539', '83105511539.5', 1, 30, 8); t('83105511539', '83105511539.499999999999999999999999999999', void 0, 0);
t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 0); t('83105511539', '83105511539.499999999999999999999999999999', 1, 1);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 1); t('83105511539', '83105511539.499999999999999999999999999999', void 0, 2);
t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 2); t('83105511539', '83105511539.499999999999999999999999999999', 1, 3);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 3); t('83105511539', '83105511539.499999999999999999999999999999', void 0, 4);
t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 4); t('83105511539', '83105511539.499999999999999999999999999999', 1, 5);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 5); t('83105511539', '83105511539.499999999999999999999999999999', void 0, 6);
t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 6); t('83105511539', '83105511539.499999999999999999999999999999', 1, 7);
t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 7); t('83105511539', '83105511539.499999999999999999999999999999', void 0, 8);
t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 8); t('83105511540', '83105511539.5000000000000000000001', void 0, 0);
t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 0); t('83105511539', '83105511539.5000000000000000000001', 1, 1);
t('83105511540', '83105511539.5000000000000000000001', 1, 30, 1); t('83105511540', '83105511539.5000000000000000000001', void 0, 2);
t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 2); t('83105511539', '83105511539.5000000000000000000001', 1, 3);
t('83105511540', '83105511539.5000000000000000000001', 1, 30, 3); t('83105511540', '83105511539.5000000000000000000001', void 0, 4);
t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 4); t('83105511540', '83105511539.5000000000000000000001', 1, 5);
t('83105511540', '83105511539.5000000000000000000001', 1, 30, 5); t('83105511540', '83105511539.5000000000000000000001', void 0, 6);
t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 6); t('83105511540', '83105511539.5000000000000000000001', 1, 7);
t('83105511540', '83105511539.5000000000000000000001', 1, 30, 7); t('83105511540', '83105511539.5000000000000000000001', void 0, 8);
t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 8);
Decimal.rounding = 0; Decimal.rounding = 0;
t('83105511540', '83105511539.5', void 0, 11); t('83105511540', '83105511539.5');
Decimal.rounding = 1; Decimal.rounding = 1;
t('83105511539', '83105511539.5', void 0, 11); t('83105511539', '83105511539.5');
t('3847570', '3847561.00000749', 10, 0);
t('42840000000000000', '42835000000000001', '1e+13', 0);
t('42830000000000000', '42835000000000001', '1e+13', 1);
t('42840000000000000', '42835000000000000.0002', '1e+13', 0);
t('42830000000000000', '42835000000000000.0002', '1e+13', 1);
t('500', '449.999', 100, 0);
t('400', '449.999', 100, 1);
t('500', '449.999', 100, 2);
t('400', '449.999', 100, 3);
t('400', '449.999', 100, 4);
t('400', '449.999', 100, 5);
t('400', '449.999', 100, 6);
t('400', '449.999', 100, 7);
t('400', '449.999', 100, 8);
t('-500', '-449.999', 100, 0);
t('-400', '-449.999', 100, 1);
t('-400', '-449.999', 100, 2);
t('-500', '-449.999', 100, 3);
t('-400', '-449.999', 100, 4);
t('-400', '-449.999', 100, 5);
t('-400', '-449.999', 100, 6);
t('-400', '-449.999', 100, 7);
t('-400', '-449.999', 100, 8);
t('500', '450', 100, 0);
t('400', '450', 100, 1);
t('500', '450', 100, 2);
t('400', '450', 100, 3);
t('500', '450', 100, 4);
t('400', '450', 100, 5);
t('400', '450', 100, 6);
t('500', '450', 100, 7);
t('400', '450', 100, 8);
t('-500', '-450', 100, 0);
t('-400', '-450', 100, 1);
t('-400', '-450', 100, 2);
t('-500', '-450', 100, 3);
t('-500', '-450', 100, 4);
t('-400', '-450', 100, 5);
t('-400', '-450', 100, 6);
t('-400', '-450', 100, 7);
t('-500', '-450', 100, 8);
t('3847560', '3847561.00000749', 10, 11, 0); Decimal.rounding = 0;
t('42840000000000000', '42835000000000001', '1e+13', 2, 0); t('500', '450.001', 100);
t('42840000000000000', '42835000000000001', '1e+13', 2, 1); Decimal.rounding = 1;
t('42840000000000000', '42835000000000000.0002', '1e+13', 200, 0); t('400', '450.001', 100);
t('42840000000000000', '42835000000000000.0002', '1e+13', 200, 1); Decimal.rounding = 2;
t('500', '450.001', 100);
Decimal.rounding = 3;
t('400', '450.001', 100);
Decimal.rounding = 4;
t('500', '450.001', 100);
Decimal.rounding = 5;
t('500', '450.001', 100);
Decimal.rounding = 6;
t('500', '450.001', 100);
Decimal.rounding = 7;
t('500', '450.001', 100);
Decimal.rounding = 8;
t('500', '450.001', 100);
Decimal.rounding = 0;
t('-500', '-450.001', 100);
Decimal.rounding = 1;
t('-400', '-450.001', 100);
Decimal.rounding = 2;
t('-400', '-450.001', 100);
Decimal.rounding = 3;
t('-500', '-450.001', 100);
Decimal.rounding = 4;
t('-500', '-450.001', 100);
Decimal.rounding = 5;
t('-500', '-450.001', 100);
Decimal.rounding = 6;
t('-500', '-450.001', 100);
Decimal.rounding = 7;
t('-500', '-450.001', 100);
Decimal.rounding = 8;
t('-500', '-450.001', 100);
}); });

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