-
Notifications
You must be signed in to change notification settings - Fork 7
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
fix a bug with computation of cos/sin near zero;
fix exp to work faster for large positive or negative values; fix argument reduction in sin/cos;
- Loading branch information
Showing
5 changed files
with
159 additions
and
87 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| /node_modules/ |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
|
|
||
| import Decimal from './node_modules/decimal.js/decimal.mjs'; | ||
|
|
||
| function rm(roundingMode) { | ||
| if (roundingMode === 'floor') { | ||
| return Decimal.ROUND_FLOOR; | ||
| } | ||
| if (roundingMode === 'ceil') { | ||
| return Decimal.ROUND_CEIL; | ||
| } | ||
| if (roundingMode === 'half-even') { | ||
| return Decimal.ROUND_HALF_EVEN; | ||
| } | ||
| if (roundingMode === 'half-up') { | ||
| return Decimal.ROUND_HALF_UP; | ||
| } | ||
| if (roundingMode === 'half-down') { | ||
| return Decimal.ROUND_HALF_DOWN; | ||
| } | ||
| throw new RangeError('rounding mode: ' + roundingMode); | ||
| } | ||
|
|
||
| function setRounding(rounding) { | ||
| if (rounding != null) { | ||
| if (rounding.maximumFractionDigits != undefined) { | ||
| throw new RangeError("rounding to maximumFractionDigits is not supported"); | ||
| } | ||
| Decimal.precision = rounding.maximumSignificantDigits; | ||
| Decimal.rounding = rm(rounding.roundingMode); | ||
| } else { | ||
| Decimal.precision = 1e+9; | ||
| } | ||
| } | ||
|
|
||
| function BigDecimal() { | ||
| } | ||
| BigDecimal.BigDecimal = function (value) { | ||
| return Decimal(typeof value === 'number' ? value : value.toString()); | ||
| }; | ||
| BigDecimal.toBigInt = function (a) { | ||
| return BigInt(a.toFixed(0)); | ||
| }; | ||
| BigDecimal.toNumber = function (a) { | ||
| return a.toNumber(); | ||
| }; | ||
| BigDecimal.unaryMinus = function (a) { | ||
| return a.negated(); | ||
| }; | ||
| BigDecimal.add = function (a, b, rounding) { | ||
| setRounding(rounding); | ||
| return a.add(b); | ||
| }; | ||
| BigDecimal.subtract = function (a, b, rounding) { | ||
| setRounding(rounding); | ||
| return a.sub(b); | ||
| }; | ||
| BigDecimal.multiply = function (a, b, rounding) { | ||
| setRounding(rounding); | ||
| return a.mul(b); | ||
| }; | ||
| BigDecimal.divide = function (a, b, rounding) { | ||
| if (rounding == null) { | ||
| //throw new RangeError(); | ||
| setRounding(null); // it is working for exact divisions and throws an exception for inexact, seems | ||
| } else { | ||
| setRounding(rounding); | ||
| } | ||
| return a.div(b); | ||
| }; | ||
|
|
||
| BigDecimal.lessThan = function (a, b) { | ||
| return a.lt(b); | ||
| }; | ||
| BigDecimal.greaterThan = function (a, b) { | ||
| return a.gt(b); | ||
| }; | ||
| BigDecimal.equal = function (a, b) { | ||
| return a.eq(b); | ||
| }; | ||
|
|
||
| BigDecimal.cos = function (a, rounding) { | ||
| setRounding(rounding); | ||
| return a.cos(); | ||
| }; | ||
| BigDecimal.sin = function (a, rounding) { | ||
| setRounding(rounding); | ||
| return a.sin(); | ||
| }; | ||
| BigDecimal.exp = function (a, rounding) { | ||
| setRounding(rounding); | ||
| return a.exp(); | ||
| }; | ||
| BigDecimal.log = function (a, rounding) { | ||
| setRounding(rounding); | ||
| return a.ln(); | ||
| }; | ||
| BigDecimal.atan = function (a, rounding) { | ||
| setRounding(rounding); | ||
| return a.atan(); | ||
| }; | ||
|
|
||
| BigDecimal.round = function (a, rounding) { | ||
| if (rounding.maximumFractionDigits != undefined) { | ||
| return a.toDecimalPlaces(rounding.maximumFractionDigits, rm(rounding.roundingMode)); | ||
| } | ||
| if (rounding.maximumSignificantDigits == undefined) { | ||
| throw new RangeError('rounding without maximumSignificantDigits is not supported'); | ||
| } | ||
| return a.toSignificantDigits(rounding.maximumSignificantDigits, rm(rounding.roundingMode)); | ||
| }; | ||
|
|
||
| export default BigDecimal; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.