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46 lines
2.2 KiB
Java
46 lines
2.2 KiB
Java
/*
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* Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package compiler.lib.generators;
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/**
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* Defines the underlying randomness source used by the generators. This is essentially a subset of
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* {@link java.util.random.RandomGenerator} and the present methods have the same contract.
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* This interface greatly benefits testing, as it is much easier to implement than
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* {@link java.util.random.RandomGenerator} and thus makes creating test doubles more convenient.
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*/
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public interface RandomnessSource {
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/** Samples the next long value uniformly at random. */
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long nextLong();
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/** Samples the next long value in the half-open interval [lo, hi) uniformly at random. */
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long nextLong(long lo, long hi);
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/** Samples the next int value uniformly at random. */
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int nextInt();
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/** Samples the next int value in the half-open interval [lo, hi) uniformly at random. */
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int nextInt(int lo, int hi);
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/** Samples the next double value in the half-open interval [lo, hi) uniformly at random. */
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double nextDouble(double lo, double hi);
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/** Samples the next float value in the half-open interval [lo, hi) uniformly at random. */
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float nextFloat(float lo, float hi);
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}
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