mirror of
https://github.com/LadybirdBrowser/ladybird.git
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260 lines
8 KiB
C++
260 lines
8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/FlyString.h>
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#include <AK/Function.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/MathObject.h>
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#include <math.h>
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namespace JS {
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MathObject::MathObject()
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: Object(interpreter().global_object().object_prototype())
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{
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u8 attr = Attribute::Writable | Attribute::Configurable;
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put_native_function("abs", abs, 1, attr);
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put_native_function("random", random, 0, attr);
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put_native_function("sqrt", sqrt, 1, attr);
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put_native_function("floor", floor, 1, attr);
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put_native_function("ceil", ceil, 1, attr);
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put_native_function("round", round, 1, attr);
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put_native_function("max", max, 2, attr);
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put_native_function("min", min, 2, attr);
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put_native_function("trunc", trunc, 1, attr);
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put_native_function("sin", sin, 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("pow", pow, 2, attr);
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put_native_function("exp", exp, 1, attr);
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put_native_function("expm1", expm1, 1, attr);
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put_native_function("sign", sign, 1, attr);
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put_native_function("clz32", clz32, 1, attr);
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put("E", Value(M_E), 0);
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put("LN2", Value(M_LN2), 0);
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put("LN10", Value(M_LN10), 0);
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put("LOG2E", Value(log2(M_E)), 0);
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put("LOG10E", Value(log10(M_E)), 0);
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put("PI", Value(M_PI), 0);
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put("SQRT1_2", Value(::sqrt(1.0 / 2.0)), 0);
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put("SQRT2", Value(::sqrt(2)), 0);
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}
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MathObject::~MathObject()
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{
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}
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Value MathObject::abs(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(number.as_double() >= 0 ? number.as_double() : -number.as_double());
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}
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Value MathObject::random(Interpreter&)
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{
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#ifdef __serenity__
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double r = (double)arc4random() / (double)UINT32_MAX;
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#else
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double r = (double)rand() / (double)RAND_MAX;
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#endif
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return Value(r);
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}
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Value MathObject::sqrt(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(::sqrt(number.as_double()));
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}
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Value MathObject::floor(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(::floor(number.as_double()));
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}
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Value MathObject::ceil(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(::ceil(number.as_double()));
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}
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Value MathObject::round(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(::round(number.as_double()));
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}
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Value MathObject::max(Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return js_negative_infinity();
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auto max = interpreter.argument(0).to_number(interpreter);
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if (interpreter.exception())
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return {};
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for (size_t i = 1; i < interpreter.argument_count(); ++i) {
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auto cur = interpreter.argument(i).to_number(interpreter);
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if (interpreter.exception())
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return {};
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max = Value(cur.as_double() > max.as_double() ? cur : max);
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}
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return max;
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}
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Value MathObject::min(Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return js_infinity();
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auto min = interpreter.argument(0).to_number(interpreter);
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if (interpreter.exception())
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return {};
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for (size_t i = 1; i < interpreter.argument_count(); ++i) {
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auto cur = interpreter.argument(i).to_number(interpreter);
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if (interpreter.exception())
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return {};
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min = Value(cur.as_double() < min.as_double() ? cur : min);
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}
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return min;
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}
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Value MathObject::trunc(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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if (number.as_double() < 0)
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return MathObject::ceil(interpreter);
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return MathObject::floor(interpreter);
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}
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Value MathObject::sin(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(::sin(number.as_double()));
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}
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Value MathObject::cos(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(::cos(number.as_double()));
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}
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Value MathObject::tan(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(::tan(number.as_double()));
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}
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Value MathObject::pow(Interpreter& interpreter)
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{
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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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Value MathObject::expm1(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()) - 1);
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}
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Value MathObject::sign(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_positive_zero())
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return Value(0);
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if (number.is_negative_zero())
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return Value(-0.0);
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if (number.as_double() > 0)
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return Value(1);
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if (number.as_double() < 0)
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return Value(-1);
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return js_nan();
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}
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Value MathObject::clz32(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_finite_number() || (unsigned)number.as_double() == 0)
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return Value(32);
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return Value(__builtin_clz((unsigned)number.as_double()));
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}
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}
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