| 23 | import java.util.UUID; |
| 24 | |
| 25 | public class RNG extends Random { |
| 26 | public static final RNG r = new RNG(); |
| 27 | private static final char[] CHARGEN = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-=!@#$%^&*()_+`~[];',./<>?:\\\"{}|\\\\".toCharArray(); |
| 28 | private static final long serialVersionUID = 5222938581174415179L; |
| 29 | private final long sx; |
| 30 | |
| 31 | public RNG() { |
| 32 | super(); |
| 33 | sx = 0; |
| 34 | } |
| 35 | |
| 36 | public RNG(long seed) { |
| 37 | super(seed); |
| 38 | this.sx = seed; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Creates a seed (long) from the hash of the seed string |
| 43 | * |
| 44 | * @param seed the seed (string) |
| 45 | */ |
| 46 | public RNG(String seed) { |
| 47 | this(UUID.nameUUIDFromBytes(seed.getBytes(StandardCharsets.UTF_8)).getLeastSignificantBits() + UUID.nameUUIDFromBytes(seed.getBytes(StandardCharsets.UTF_8)).getMostSignificantBits() + (seed.length() * 32564)); |
| 48 | } |
| 49 | |
| 50 | public RNG nextParallelRNG(int signature) { |
| 51 | return new RNG(sx + signature); |
| 52 | } |
| 53 | |
| 54 | public RNG nextParallelRNG(long signature) { |
| 55 | return new RNG(sx + signature); |
| 56 | } |
| 57 | |
| 58 | public RNG nextRNG() { |
| 59 | return new RNG(nextLong()); |
| 60 | } |
| 61 | |
| 62 | public String s(int length) { |
| 63 | StringBuilder sb = new StringBuilder(); |
| 64 | |
| 65 | for (int i = 0; i < length; i++) { |
| 66 | sb.append(c()); |
| 67 | } |
| 68 | |
| 69 | return sb.toString(); |
| 70 | } |
| 71 | |
| 72 | public char c() { |
| 73 | return CHARGEN[i(CHARGEN.length - 1)]; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Pick a random enum |
| 78 | * |
| 79 | * @param t the enum class |
| 80 | * @return the enum |
| 81 | */ |
| 82 | public <T> T e(Class<T> t) { |
nothing calls this directly
no test coverage detected