internal static bool Parse(string s, bool tryParse, out uint result, out Exception exc)
{
uint val = 0;
int len;
int i;
bool digits_seen = false;
bool has_negative_sign = false;
result = 0;
exc = null;
if (s == null)
{
if (!tryParse)
{
exc = new ArgumentNullException("s");
}
return(false);
}
len = s.Length;
char c;
for (i = 0; i < len; i++)
{
c = s [i];
if (!Char.IsWhiteSpace(c))
{
break;
}
}
if (i == len)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (s [i] == '+')
{
i++;
}
else
if (s[i] == '-')
{
i++;
has_negative_sign = true;
}
for (; i < len; i++)
{
c = s [i];
if (c >= '0' && c <= '9')
{
uint d = (uint)(c - '0');
if ((val > MaxValue / 10) || (val == (MaxValue / 10) && d > (MaxValue % 10)))
{
if (!tryParse)
{
exc = new OverflowException(Locale.GetText("Value is too large"));
}
return(false);
}
val = (val * 10) + d;
digits_seen = true;
}
else if (!Int32.ProcessTrailingWhitespace(tryParse, s, i, ref exc))
{
return(false);
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
// -0 is legal but other negative values are not
if (has_negative_sign && (val > 0))
{
if (!tryParse)
{
exc = new OverflowException(
Locale.GetText("Negative number"));
}
return(false);
}
result = val;
return(true);
}
internal static bool Parse(string s, bool tryParse, out short result, out Exception exc)
{
short val = 0;
int len;
int i, sign = 1;
bool digits_seen = false;
result = 0;
exc = null;
if (s == null)
{
if (!tryParse)
{
exc = new ArgumentNullException("s");
}
return(false);
}
len = s.Length;
char c;
for (i = 0; i < len; i++)
{
c = s [i];
if (!Char.IsWhiteSpace(c))
{
break;
}
}
if (i == len)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
c = s [i];
if (c == '+')
{
i++;
}
else if (c == '-')
{
sign = -1;
i++;
}
for (; i < len; i++)
{
c = s [i];
if (c >= '0' && c <= '9')
{
byte d = (byte)(c - '0');
if (val > (MaxValue / 10))
{
goto overflow;
}
if (val == (MaxValue / 10))
{
if ((d > (MaxValue % 10)) && (sign == 1 || (d > ((MaxValue % 10) + 1))))
{
goto overflow;
}
if (sign == -1)
{
val = (short)((val * sign * 10) - d);
}
else
{
val = (short)((val * 10) + d);
}
if (Int32.ProcessTrailingWhitespace(tryParse, s, i + 1, ref exc))
{
result = val;
return(true);
}
goto overflow;
}
else
{
val = (short)(val * 10 + d);
}
digits_seen = true;
}
else if (!Int32.ProcessTrailingWhitespace(tryParse, s, i, ref exc))
{
return(false);
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (sign == -1)
{
result = (short)(val * sign);
}
else
{
result = val;
}
return(true);
overflow:
if (!tryParse)
{
exc = new OverflowException("Value is too large");
}
return(false);
}
internal static bool Parse(string s, bool tryParse, out long result, out Exception exc)
{
long val = 0;
int len;
int i, sign = 1;
bool digits_seen = false;
result = 0;
exc = null;
NumberFormatInfo nfi = Thread.CurrentThread.CurrentCulture.NumberFormat;
if (s == null)
{
if (!tryParse)
{
exc = new ArgumentNullException("s");
}
return(false);
}
len = s.Length;
char c;
for (i = 0; i < len; i++)
{
c = s [i];
if (!Char.IsWhiteSpace(c))
{
break;
}
}
if (i == len)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (String.Compare(s, i, nfi.PositiveSign, 0, nfi.PositiveSign.Length) == 0)
{
i += nfi.PositiveSign.Length;
}
else if (String.Compare(s, i, nfi.NegativeSign, 0, nfi.NegativeSign.Length) == 0)
{
sign = -1;
i += nfi.NegativeSign.Length;
}
for (; i < len; i++)
{
c = s [i];
if (c >= '0' && c <= '9')
{
byte d = (byte)(c - '0');
if (val > (MaxValue / 10))
{
goto overflow;
}
if (val == (MaxValue / 10))
{
if ((d > (MaxValue % 10)) && (sign == 1 || (d > ((MaxValue % 10) + 1))))
{
goto overflow;
}
if (sign == -1)
{
val = (val * sign * 10) - d;
}
else
{
val = (val * 10) + d;
}
if (Int32.ProcessTrailingWhitespace(tryParse, s, i + 1, ref exc))
{
result = val;
return(true);
}
goto overflow;
}
else
{
val = val * 10 + d;
}
digits_seen = true;
}
else if (!Int32.ProcessTrailingWhitespace(tryParse, s, i, ref exc))
{
return(false);
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (sign == -1)
{
result = val * sign;
}
else
{
result = val;
}
return(true);
overflow:
if (!tryParse)
{
exc = new OverflowException("Value is too large");
}
return(false);
}
internal static bool Parse(string s, bool tryParse, out ulong result, out Exception exc)
{
ulong val = 0;
int len;
int i;
bool digits_seen = false;
bool has_negative_sign = false;
exc = null;
result = 0;
if (s == null)
{
if (!tryParse)
{
exc = new ArgumentNullException("s");
}
return(false);
}
len = s.Length;
char c;
for (i = 0; i < len; i++)
{
c = s [i];
if (!Char.IsWhiteSpace(c))
{
break;
}
}
if (i == len)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (s [i] == '+')
{
i++;
}
else if (s [i] == '-')
{
i++;
has_negative_sign = true;
}
// Actual number stuff
for (; i < len; i++)
{
c = s [i];
if (c >= '0' && c <= '9')
{
uint d = (uint)(c - '0');
if (val > MaxValue / 10 || (val == MaxValue / 10 && d > MaxValue % 10))
{
if (!tryParse)
{
exc = new OverflowException("Value is too large.");
}
return(false);
}
val = (val * 10) + d;
digits_seen = true;
}
else if (!Int32.ProcessTrailingWhitespace(tryParse, s, i, ref exc))
{
return(false);
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (has_negative_sign && val > 0)
{
if (!tryParse)
{
exc = new OverflowException("Negative number.");
}
return(false);
}
result = val;
return(true);
}