Revert "RandomExtensions.NextBigIntegerSequence"

This reverts commit 74470f9.

Author: 埃博拉酱

src/Numerics.Tests/Random/RandomExtensionTests.cs

@@ -29,8 +29,6 @@
 
 using MathNet.Numerics.Random;
 using NUnit.Framework;
-using System.Numerics;
-using System.Collections.Generic;
 
 namespace MathNet.Numerics.UnitTests.Random
 {
@@ -50,22 +48,6 @@ public void CanSampleInt64()
             rnd.NextInt64();
         }
 
-        /// <summary>
-        /// Can sample BigInteger
-        /// </summary>
-        [Test]
-        public void CanSampleBigInteger()
-        {
-            var rnd = new System.Random(0);
-            IEnumerator<BigInteger> Sequence = rnd.NextBigIntegerSequence((BigInteger)long.MinValue * 3, (BigInteger)long.MaxValue * 3).GetEnumerator();
-            Sequence.MoveNext();
-            System.Console.WriteLine(Sequence.Current);
-            Sequence.MoveNext();
-            System.Console.WriteLine(Sequence.Current);
-            Sequence.MoveNext();
-            System.Console.WriteLine(Sequence.Current);
-        }
-
         /// <summary>
         /// Can sample full range int32.
         /// </summary>

src/Numerics/Random/RandomExtensions.cs

@@ -29,8 +29,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Numerics;
-using System.Linq;
 
 namespace MathNet.Numerics.Random
 {
@@ -169,7 +167,7 @@ public static void NextInt32s(this System.Random rnd, int[] values, int minInclu
         }
 
         /// <summary>
-        /// Returns an infinite sequence of uniform random 32-bit signed integers within the specified range.
+        /// Returns an infinite sequence of uniform random numbers greater than or equal to 0.0 and less than 1.0.
         /// </summary>
         /// <remarks>
         /// This extension is thread-safe if and only if called on an random number
@@ -193,34 +191,6 @@ static IEnumerable<int> NextInt32SequenceEnumerable(System.Random rnd, int minIn
             }
         }
 
-        /// <summary>
-        /// Returns an infinite sequence of uniform random <see cref="System.Numerics.BigInteger"/> within the specified range.
-        /// </summary>
-        /// <remarks>
-        /// This extension is thread-safe if and only if called on an random number
-        /// generator provided by Math.NET Numerics or derived from the RandomSource class.
-        /// </remarks>
-        public static IEnumerable<BigInteger> NextBigIntegerSequence(this System.Random rnd, BigInteger minInclusive, BigInteger maxExclusive)
-        {
-            BigInteger AbsoluteRange = maxExclusive - minInclusive;
-            int NumBytes = (int)Math.Ceiling(BigInteger.Log(AbsoluteRange, byte.MaxValue) * 2);
-            byte[] ByteSequence = Enumerable.Repeat(byte.MaxValue, NumBytes + 1).ToArray();
-            ByteSequence[NumBytes] = 0;
-            BigInteger RandomNumber = new BigInteger(ByteSequence);
-            BigInteger ValidRange = RandomNumber - RandomNumber % AbsoluteRange;
-            while(true)
-            {
-                do
-                {
-                    rnd.NextBytes(ByteSequence);
-                    ByteSequence[NumBytes] = 0;
-                    RandomNumber = new BigInteger(ByteSequence);
-                }
-                while (RandomNumber >= ValidRange);
-                yield return RandomNumber % AbsoluteRange + minInclusive;
-            }
-        }
-
         /// <summary>
         /// Returns a nonnegative random number less than <see cref="Int64.MaxValue"/>.
         /// </summary>