public static string RandomDecimalStringShort(IRandomGenExtended
wrapper, bool extended)
{
var sb = new StringBuilder();
if (wrapper == null)
{
throw new ArgumentNullException(nameof(wrapper));
}
int len = 1 + wrapper.GetInt32(4);
if (!extended)
{
sb.Append((char)('1' + wrapper.GetInt32(9)));
--len;
}
AppendRandomDecimals(wrapper, sb, len);
sb.Append('.');
len = 1 + wrapper.GetInt32(36);
AppendRandomDecimals(wrapper, sb, len);
sb.Append('E');
len = wrapper.GetInt32(25) - 12;
sb.Append(TestCommon.IntToString(len));
return(sb.ToString());
}
public static String RandomDecimalString(RandomGenerator r)
{
if (r == null)
{
throw new ArgumentNullException(nameof(r));
}
int count = r.UniformInt(MaxShortNumberLength) + 1;
var sb = new StringBuilder();
if (r.UniformInt(2) == 0)
{
sb.Append('-');
}
for (var i = 0; i < count; ++i)
{
if (i == 0 && count > 1)
{
sb.Append((char)('1' + r.UniformInt(9)));
}
else
{
sb.Append((char)('0' + r.UniformInt(10)));
}
}
if (r.UniformInt(2) == 0)
{
sb.Append('.');
count = r.UniformInt(30) + 1;
for (var i = 0; i < count; ++i)
{
sb.Append((char)('0' + r.UniformInt(10)));
}
}
if (r.UniformInt(2) == 0)
{
sb.Append('E');
count = (r.UniformInt(100) < 10) ?
r.UniformInt(MaxExclusiveExponentLength) :
r.UniformInt(10);
if (count != 0)
{
sb.Append(r.UniformInt(2) == 0 ? '+' : '-');
}
sb.Append(TestCommon.IntToString(count));
}
return(sb.ToString());
}
public static String RandomDecimalString(RandomGenerator r)
{
int count = r.UniformInt(40) + 1;
var sb = new StringBuilder();
if (r.UniformInt(2) == 0)
{
sb.Append('-');
}
for (var i = 0; i < count; ++i)
{
if (i == 0 && count > 1)
{
sb.Append((char)('1' + r.UniformInt(9)));
}
else
{
sb.Append((char)('0' + r.UniformInt(10)));
}
}
if (r.UniformInt(2) == 0)
{
sb.Append('.');
count = r.UniformInt(30) + 1;
for (var i = 0; i < count; ++i)
{
sb.Append((char)('0' + r.UniformInt(10)));
}
}
if (r.UniformInt(2) == 0)
{
sb.Append('E');
count = (r.UniformInt(100) < 10) ? r.UniformInt(5000) :
r.UniformInt(20);
if (count != 0)
{
sb.Append(r.UniformInt(2) == 0 ? '+' : '-');
}
sb.Append(TestCommon.IntToString(count));
}
return(sb.ToString());
}
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());
}
