77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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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/Array.h>
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#include <LibJS/Runtime/MathObject.h>
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namespace JS {
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MathObject::MathObject()
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{
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put_native_function("abs", abs);
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put_native_function("random", random);
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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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if (interpreter.call_frame().arguments.is_empty())
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return js_nan();
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auto argument = interpreter.call_frame().arguments[0];
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if (argument.is_array()) {
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auto& array = *static_cast<const Array*>(argument.as_object());
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if (array.length() == 0)
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return Value(0);
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if (array.length() > 1)
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return js_nan();
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argument = array.elements()[0];
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}
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auto number = argument.to_number();
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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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}
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