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root/jsr166/jsr166/src/main/java/util/SplittableRandom.java

Comparing jsr166/src/main/java/util/SplittableRandom.java (file contents):
Revision 1.37 by jsr166, Thu Nov 17 22:09:52 2016 UTC vs.
Revision 1.41 by jsr166, Sun Dec 2 23:06:16 2018 UTC

#	Line 80 | Line 80 | import java.util.stream.StreamSupport;
80		* in security-sensitive applications. Additionally,
81		* default-constructed instances do not use a cryptographically random
82		* seed unless the {@linkplain System#getProperty system property}
83	<	* {@code java.util.secureRandomSeed} is set to {@code true}.
83	>	* {@systemProperty java.util.secureRandomSeed} is set to {@code true}.
84		*
85		* @author  Guy Steele
86		* @author  Doug Lea
#	Line 375 | Line 375 | public final class SplittableRandom {
375		* may, and typically does, vary across program invocations.
376		*/
377		public SplittableRandom() { // emulate defaultGen.split()
378	<	long s = defaultGen.getAndAdd(2 * GOLDEN_GAMMA);
378	>	long s = defaultGen.getAndAdd(GOLDEN_GAMMA << 1);
379		this.seed = mix64(s);
380		this.gamma = mixGamma(s + GOLDEN_GAMMA);
381		}
#	Line 399 | Line 399 | public final class SplittableRandom {
399		}
400
401		/**
402	+	* Fills a user-supplied byte array with generated pseudorandom bytes.
403	+	*
404	+	* @param  bytes the byte array to fill with pseudorandom bytes
405	+	* @throws NullPointerException if bytes is null
406	+	* @since  10
407	+	*/
408	+	public void nextBytes(byte[] bytes) {
409	+	int i = 0;
410	+	int len = bytes.length;
411	+	for (int words = len >> 3; words--> 0; ) {
412	+	long rnd = nextLong();
413	+	for (int n = 8; n--> 0; rnd >>>= Byte.SIZE)
414	+	bytes[i++] = (byte)rnd;
415	+	}
416	+	if (i < len)
417	+	for (long rnd = nextLong(); i < len; rnd >>>= Byte.SIZE)
418	+	bytes[i++] = (byte)rnd;
419	+	}
420	+
421	+	/**
422		* Returns a pseudorandom {@code int} value.
423		*
424		* @return a pseudorandom {@code int} value
#	Line 779 | Line 799 | public final class SplittableRandom {
799		* @return a stream of pseudorandom {@code double} values,
800		*         each with the given origin (inclusive) and bound (exclusive)
801		* @throws IllegalArgumentException if {@code streamSize} is
802	<	*         less than zero
783	<	* @throws IllegalArgumentException if {@code randomNumberOrigin}
802	>	*         less than zero, or {@code randomNumberOrigin}
803		*         is greater than or equal to {@code randomNumberBound}
804		*/
805		public DoubleStream doubles(long streamSize, double randomNumberOrigin,

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