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LibJS: Add Math.exp()
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b27834cf16
commit
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5 changed files with 48 additions and 12 deletions
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@ -50,6 +50,7 @@ MathObject::MathObject()
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put_native_function("cos", cos, 1, attr);
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put_native_function("cos", cos, 1, attr);
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put_native_function("tan", tan, 1, attr);
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put_native_function("tan", tan, 1, attr);
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put_native_function("pow", pow, 2, attr);
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put_native_function("pow", pow, 2, attr);
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put_native_function("exp", exp, 1, attr);
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put_native_function("sign", sign, 1, attr);
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put_native_function("sign", sign, 1, attr);
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put("E", Value(M_E), 0);
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put("E", Value(M_E), 0);
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@ -204,7 +205,17 @@ Value MathObject::tan(Interpreter& interpreter)
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Value MathObject::pow(Interpreter& interpreter)
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Value MathObject::pow(Interpreter& interpreter)
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{
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{
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return exp(interpreter, interpreter.argument(0), interpreter.argument(1));
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return JS::exp(interpreter, interpreter.argument(0), interpreter.argument(1));
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}
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Value MathObject::exp(Interpreter& interpreter)
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{
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auto number = interpreter.argument(0).to_number(interpreter);
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if (interpreter.exception())
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return {};
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if (number.is_nan())
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return js_nan();
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return Value(::pow(M_E, number.as_double()));
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}
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}
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Value MathObject::sign(Interpreter& interpreter)
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Value MathObject::sign(Interpreter& interpreter)
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@ -51,6 +51,7 @@ private:
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static Value cos(Interpreter&);
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static Value cos(Interpreter&);
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static Value tan(Interpreter&);
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static Value tan(Interpreter&);
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static Value pow(Interpreter&);
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static Value pow(Interpreter&);
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static Value exp(Interpreter&);
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static Value sign(Interpreter&);
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static Value sign(Interpreter&);
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};
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};
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@ -1,17 +1,14 @@
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load("test-common.js");
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load("test-common.js");
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// Borrowed from LibM/TestMath.cpp :^)
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function expectClose(a, b) { assert(Math.abs(a - b) < 0.000001); }
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try {
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try {
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expectClose(Math.E, 2.718281);
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assert(isClose(Math.E, 2.718281));
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expectClose(Math.LN2, 0.693147);
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assert(isClose(Math.LN2, 0.693147));
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expectClose(Math.LN10, 2.302585);
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assert(isClose(Math.LN10, 2.302585));
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expectClose(Math.LOG2E, 1.442695);
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assert(isClose(Math.LOG2E, 1.442695));
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expectClose(Math.LOG10E, 0.434294);
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assert(isClose(Math.LOG10E, 0.434294));
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expectClose(Math.PI, 3.1415926);
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assert(isClose(Math.PI, 3.1415926));
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expectClose(Math.SQRT1_2, 0.707106);
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assert(isClose(Math.SQRT1_2, 0.707106));
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expectClose(Math.SQRT2, 1.414213);
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assert(isClose(Math.SQRT2, 1.414213));
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console.log("PASS");
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console.log("PASS");
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} catch (e) {
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} catch (e) {
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19
Libraries/LibJS/Tests/Math.exp.js
Normal file
19
Libraries/LibJS/Tests/Math.exp.js
Normal file
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@ -0,0 +1,19 @@
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load("test-common.js");
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try {
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assert(Math.exp.length === 1);
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assert(Math.exp(0) === 1);
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assert(isClose(Math.exp(-2), 0.135335));
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assert(isClose(Math.exp(-1), 0.367879));
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assert(isClose(Math.exp(1), 2.718281));
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assert(isClose(Math.exp(2), 7.389056));
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assert(isNaN(Math.exp()));
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assert(isNaN(Math.exp(undefined)));
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assert(isNaN(Math.exp("foo")));
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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@ -50,3 +50,11 @@ function assertThrowsError(testFunction, options) {
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}
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}
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}
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}
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/**
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* Check whether the difference between two numbers is less than 0.000001.
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* @param {Number} a First number
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* @param {Number} b Second number
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*/
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function isClose(a, b) {
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return Math.abs(a - b) < 0.000001;
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}
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