public static String RandomDecimalString(
IRandomGenExtended r,
bool extended,
bool limitedExponent)
{
if (r == null)
{
throw new ArgumentNullException(nameof(r));
}
if (r.GetInt32(100) < 95)
{
return(RandomDecimalStringShort(r, extended));
}
long count = ((long)r.GetInt32(MaxNumberLength) *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
count = ((long)count * r.GetInt32(MaxNumberLength)) / MaxNumberLength;
count = Math.Max(1, count);
long afterPointCount = 0;
long exponentCount = 0;
var smallExponent = false;
if (r.GetInt32(2) == 0)
{
afterPointCount = ((long)r.GetInt32(MaxNumberLength) *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
afterPointCount = ((long)afterPointCount *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
afterPointCount = Math.Max(1, afterPointCount);
}
if (r.GetInt32(2) == 0)
{
if (limitedExponent || r.GetInt32(10) > 0)
{
exponentCount = 5;
}
else
{
exponentCount = ((long)r.GetInt32(MaxNumberLength) *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
exponentCount = ((long)exponentCount *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
exponentCount = ((long)exponentCount *
r.GetInt32(MaxNumberLength)) / MaxNumberLength;
exponentCount = Math.Max(1, exponentCount);
}
}
var bufferSize = (int)Math.Min(
Int32.MaxValue,
8 + count + afterPointCount + exponentCount);
var sb = new StringBuilder(bufferSize);
if (r.GetInt32(2) == 0)
{
sb.Append('-');
}
if (!extended)
{
sb.Append((char)('1' + r.GetInt32(9)));
--count;
}
AppendRandomDecimalsLong(r, sb, count);
if (afterPointCount > 0)
{
sb.Append('.');
AppendRandomDecimalsLong(r, sb, afterPointCount);
}
if (exponentCount > 0)
{
int rr = r.GetInt32(3);
if (rr == 0)
{
sb.Append('E');
}
else if (rr == 1)
{
sb.Append("E+");
}
else if (rr == 2)
{
sb.Append("E-");
}
if (smallExponent)
{
sb.Append(TestCommon.IntToString(r.GetInt32(10000)));
}
else
{
AppendRandomDecimalsLong(r, sb, exponentCount);
}
}
return(sb.ToString());
}