public static ERational RandomERational(RandomGenerator rand) {
EInteger bigintA = RandomEInteger(rand);
EInteger bigintB = RandomEInteger(rand);
if (bigintB.isZero()) {
bigintB = EInteger.FromInt32(1);
}
return ERational.Create(bigintA, bigintB);
}
public static EFloat RandomEFloat(RandomGenerator r) {
if (r.UniformInt(100) == 0) {
int x = r.UniformInt(3);
if (x == 0) {
return EFloat.PositiveInfinity;
}
if (x == 1) {
return EFloat.NegativeInfinity;
}
if (x == 2) {
return EFloat.NaN;
}
}
return EFloat.Create(RandomEInteger(r), EInteger.FromInt64(r.UniformInt(400) - 200));
}
public static EInteger RandomSmallIntegral(RandomGenerator r) {
int count = r.UniformInt(20) + 1;
StringBuilder sb = new StringBuilder();
if (r.UniformInt(2) == 0) {
sb.append('-');
}
for (int i = 0; i < count; ++i) {
if (i == 0) {
sb.append((char) ('1' + r.UniformInt(9)));
} else {
sb.append((char) ('0' + r.UniformInt(10)));
}
}
return EInteger.FromString(sb.toString());
}
public static EInteger RandomEInteger(RandomGenerator r) {
int selection = r.UniformInt(100);
if (selection < 40) {
StringAndBigInt sabi = StringAndBigInt.Generate(r, 16);
return sabi.getBigIntValue();
}
if (selection < 50) {
StringAndBigInt sabi = StringAndBigInt.Generate(r, 2 + r.UniformInt(35));
return sabi.getBigIntValue();
} else {
int count = r.UniformInt(400) + 1;
byte[] bytes = new byte[count];
for (int i = 0; i < count; ++i) {
bytes[i] = (byte) ((int) r.UniformInt(256));
}
return EInteger.FromBytes(bytes, true);
}
}
