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_random.cs
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113 lines (93 loc) · 3.23 KB
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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using IronPython.Runtime;
using IronPython.Runtime.Operations;
using Microsoft.Scripting.Utils;
#if FEATURE_NUMERICS
using System.Numerics;
#else
using Microsoft.Scripting.Math;
#endif
[assembly: PythonModule("_random", typeof(IronPython.Modules.PythonRandom))]
namespace IronPython.Modules {
public static class PythonRandom {
public const string __doc__ = "implements a random number generator";
[PythonType]
public class Random {
private System.Random _rnd;
public Random() {
seed();
}
public Random(object seed) {
this.seed(seed);
}
#region Public API surface
public object getrandbits(int bits) {
if (bits <= 0) {
throw PythonOps.ValueError("number of bits must be greater than zero");
}
lock (this) {
return _rnd.GetRandBits(bits);
}
}
public object getstate() {
return _rnd;
}
public void jumpahead(int count) {
lock (this) {
_rnd.NextBytes(new byte[4096]);
}
}
public void jumpahead(double count) {
throw PythonOps.TypeError("jumpahead requires an integer, not 'float'");
}
public object random() {
lock (this) {
return _rnd.NextDouble();
}
}
public void seed() {
seed(DateTime.Now);
}
public void seed(object s) {
if (s == null) {
seed();
return;
}
int newSeed;
if (s is int) {
newSeed = (int)s;
} else {
newSeed = s.GetHashCode();
}
lock (this) {
_rnd = new System.Random(newSeed);
}
}
public void setstate(object state) {
System.Random random = state as System.Random;
lock (this) {
if (random != null) {
_rnd = random;
} else {
throw IronPython.Runtime.Operations.PythonOps.TypeError("setstate: argument must be value returned from getstate()");
}
}
}
#endregion
}
}
}