root / trunk / compiler / ooasCompiler / src / org / momut / ooas / math / SaturatedIntegerOperations.java @ 7
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/**
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*
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* OOAS Compiler
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*
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* Copyright 2015, AIT Austrian Institute of Technology.
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* This code is based on the C# Version of the OOAS Compiler, which is
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* copyright 2015 by the Institute of Software Technology, Graz University
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* of Technology with portions copyright by the AIT Austrian Institute of
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* Technology. All rights reserved.
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*
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* SEE THE "LICENSE" FILE FOR THE TERMS UNDER WHICH THIS FILE IS PROVIDED.
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*
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* If you modify the file please update the list of contributors below to in-
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* clude your name. Please also stick to the coding convention of using TABs
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* to do the basic (block-level) indentation and spaces for anything after
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* that. (Enable the display of special chars and it should be pretty obvious
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* what this means.) Also, remove all trailing whitespace.
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*
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* Contributors:
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* Willibald Krenn (AIT)
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* Stephan Zimmerer (AIT)
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* Markus Demetz (AIT)
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* Christoph Czurda (AIT)
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*
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*/
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package org.momut.ooas.math; |
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public final class SaturatedIntegerOperations extends Operations<Integer>{ |
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public static final class SatIntegerBasicOps extends BasicOps<Integer> { |
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@Override
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public Integer unMinus(Integer input) { |
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return input == Integer.MIN_VALUE ? Integer.MAX_VALUE : -input; |
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} |
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@Override
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public Integer minus(Integer inputA, Integer inputB) { |
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if (inputB < 0) |
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return (inputA > Integer.MAX_VALUE + inputB) ? Integer.MAX_VALUE : inputA - inputB; |
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else
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return (inputA < Integer.MIN_VALUE + inputB) ? Integer.MIN_VALUE : inputA - inputB; |
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} |
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@Override
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public Integer plus(Integer inputA, Integer inputB) { |
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if (inputB < 0) |
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return (inputA < Integer.MIN_VALUE - inputB) ? Integer.MIN_VALUE : inputA + inputB; |
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else
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return (inputA > Integer.MAX_VALUE - inputB) ? Integer.MAX_VALUE : inputA + inputB; |
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} |
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@Override
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public Integer div(Integer inputA, Integer inputB) { |
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//FIXME: checked { return a / b; };
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return inputA / inputB;
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} |
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@Override
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public Integer pow(Integer inputA, Integer inputB) { |
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long tmp = (long) Math.pow(inputA, inputB); |
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if (tmp < Integer.MIN_VALUE) return Integer.MIN_VALUE; |
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else if (tmp > Integer.MAX_VALUE) return Integer.MAX_VALUE; |
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else return (int)tmp; |
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} |
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@Override
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public Integer prod(Integer inputA, Integer inputB) { |
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long tmp = (long)inputA * (long)inputB; |
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if (tmp < Integer.MIN_VALUE) return Integer.MIN_VALUE; |
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else if (tmp > Integer.MAX_VALUE) return Integer.MAX_VALUE; |
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else return (int)tmp; |
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} |
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@Override
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public Integer mod(Integer inputA, Integer inputB) {return inputA % inputB;} |
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@Override
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public boolean equal(Integer inputA, Integer inputB) {return inputA.equals(inputB);} |
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@Override
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public boolean smaller(Integer inputA, Integer inputB) {return inputA < inputB;} |
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@Override
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public boolean greater(Integer inputA, Integer inputB){return inputA > inputB;} |
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@Override
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public Integer getDefaultValue() {return 0;} |
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} |
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public SaturatedIntegerOperations() {
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super(new SatIntegerBasicOps()); |
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} |
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} |