internal static bool Parse(string s, bool tryParse, out sbyte result, out Exception exc)
{
int ival = 0;
int len;
int i;
bool neg = false;
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 = IntParser.GetFormatException();
}
return(false);
}
c = s[i];
if (c == '+')
{
i++;
}
else if (c == '-')
{
neg = true;
i++;
}
for (; i < len; i++)
{
c = s[i];
if (c >= '0' && c <= '9')
{
if (tryParse)
{
int intval = ival * 10 - (int)(c - '0');
if (intval < MinValue)
{
return(false);
}
ival = (sbyte)intval;
}
else
{
ival = checked (ival * 10 - (int)(c - '0'));
}
digits_seen = true;
}
else
{
if (Char.IsWhiteSpace(c))
{
for (i++; i < len; i++)
{
if (!Char.IsWhiteSpace(s[i]))
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
break;
}
else
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
ival = neg ? ival : -ival;
if (ival < MinValue || ival > MaxValue)
{
if (!tryParse)
{
exc = new OverflowException();
}
return(false);
}
result = (sbyte)ival;
return(true);
}
// FIXME: check if digits are group in correct numbers between the group separators
internal static bool Parse(string s, NumberStyles style, IFormatProvider provider, bool tryParse, out double result, out Exception exc)
{
result = 0;
exc = null;
if (s == null)
{
if (!tryParse)
{
exc = new ArgumentNullException("s");
}
return(false);
}
if (s.Length == 0)
{
if (!tryParse)
{
exc = new FormatException();
}
return(false);
}
#if NET_2_0
// yes it's counter intuitive (buggy?) but even TryParse actually throws in this case
if ((style & NumberStyles.AllowHexSpecifier) != 0)
{
string msg = Locale.GetText("Double doesn't support parsing with '{0}'.", "AllowHexSpecifier");
throw new ArgumentException(msg);
}
#endif
if (style > NumberStyles.Any)
{
if (!tryParse)
{
exc = new ArgumentException();
}
return(false);
}
NumberFormatInfo format = NumberFormatInfo.GetInstance(provider);
if (format == null)
{
throw new Exception("How did this happen?");
}
if (s == format.NaNSymbol)
{
result = Double.NaN;
return(true);
}
if (s == format.PositiveInfinitySymbol)
{
result = Double.PositiveInfinity;
return(true);
}
if (s == format.NegativeInfinitySymbol)
{
result = Double.NegativeInfinity;
return(true);
}
//
// validate and prepare string for C
//
int len = s.Length;
string numstr = "";
int didx = 0;
int sidx = 0;
char c;
if ((style & NumberStyles.AllowLeadingWhite) != 0)
{
while (sidx < len && Char.IsWhiteSpace(c = s[sidx]))
{
sidx++;
}
if (sidx == len)
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
bool allow_trailing_white = ((style & NumberStyles.AllowTrailingWhite) != 0);
//
// Machine state
//
int state = State_AllowSign;
//
// Setup
//
string decimal_separator = null;
string group_separator = null;
string currency_symbol = null;
int decimal_separator_len = 0;
int group_separator_len = 0;
int currency_symbol_len = 0;
if ((style & NumberStyles.AllowDecimalPoint) != 0)
{
decimal_separator = format.NumberDecimalSeparator;
decimal_separator_len = decimal_separator.Length;
}
if ((style & NumberStyles.AllowThousands) != 0)
{
group_separator = format.NumberGroupSeparator;
group_separator_len = group_separator.Length;
}
if ((style & NumberStyles.AllowCurrencySymbol) != 0)
{
currency_symbol = format.CurrencySymbol;
currency_symbol_len = currency_symbol.Length;
}
string positive = format.PositiveSign;
string negative = format.NegativeSign;
for (; sidx < len; sidx++)
{
c = s[sidx];
if (c == '\0')
{
sidx = len;
continue;
}
switch (state)
{
case State_AllowSign:
if ((style & NumberStyles.AllowLeadingSign) != 0)
{
if (c == positive[0] &&
s.Substring(sidx, positive.Length) == positive)
{
state = State_Digits;
sidx += positive.Length - 1;
continue;
}
if (c == negative[0] &&
s.Substring(sidx, negative.Length) == negative)
{
state = State_Digits;
numstr += '-';
sidx += negative.Length - 1;
continue;
}
}
state = State_Digits;
goto case State_Digits;
case State_Digits:
if (Char.IsDigit(c))
{
numstr += c;
break;
}
if (c == 'e' || c == 'E')
{
goto case State_Decimal;
}
if (decimal_separator != null &&
decimal_separator[0] == c)
{
if (String.CompareOrdinal(s, sidx, decimal_separator, 0, decimal_separator_len) == 0)
{
numstr += '.';
sidx += decimal_separator_len - 1;
state = State_Decimal;
break;
}
}
if (group_separator != null &&
group_separator[0] == c)
{
if (s.Substring(sidx, group_separator_len) ==
group_separator)
{
sidx += group_separator_len - 1;
state = State_Digits;
break;
}
}
if (currency_symbol != null &&
currency_symbol[0] == c)
{
if (s.Substring(sidx, currency_symbol_len) ==
currency_symbol)
{
sidx += currency_symbol_len - 1;
state = State_Digits;
break;
}
}
if (Char.IsWhiteSpace(c))
{
goto case State_ConsumeWhiteSpace;
}
if (!tryParse)
{
exc = new FormatException("Unknown char: " + c);
}
return(false);
case State_Decimal:
if (Char.IsDigit(c))
{
numstr += c;
break;
}
if (c == 'e' || c == 'E')
{
if ((style & NumberStyles.AllowExponent) == 0)
{
if (!tryParse)
{
exc = new FormatException("Unknown char: " + c);
}
return(false);
}
numstr += c;
state = State_ExponentSign;
break;
}
if (Char.IsWhiteSpace(c))
{
goto case State_ConsumeWhiteSpace;
}
if (!tryParse)
{
exc = new FormatException("Unknown char: " + c);
}
return(false);
case State_ExponentSign:
if (Char.IsDigit(c))
{
state = State_Exponent;
goto case State_Exponent;
}
if (c == positive[0] &&
s.Substring(sidx, positive.Length) == positive)
{
state = State_Digits;
sidx += positive.Length - 1;
continue;
}
if (c == negative[0] &&
s.Substring(sidx, negative.Length) == negative)
{
state = State_Digits;
numstr += '-';
sidx += negative.Length - 1;
continue;
}
if (Char.IsWhiteSpace(c))
{
goto case State_ConsumeWhiteSpace;
}
if (!tryParse)
{
exc = new FormatException("Unknown char: " + c);
}
return(false);
case State_Exponent:
if (Char.IsDigit(c))
{
numstr += c;
break;
}
if (Char.IsWhiteSpace(c))
{
goto case State_ConsumeWhiteSpace;
}
if (!tryParse)
{
exc = new FormatException("Unknown char: " + c);
}
return(false);
case State_ConsumeWhiteSpace:
if (allow_trailing_white && Char.IsWhiteSpace(c))
{
state = State_ConsumeWhiteSpace;
break;
}
if (!tryParse)
{
exc = new FormatException("Unknown char");
}
return(false);
}
if (state == State_Exit)
{
break;
}
}
double retVal;
try
{
retVal = Native.Global.parseFloat(numstr);
}
catch
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
//if (!ParseImpl(p, out retVal))
//{
// if (!tryParse)
// exc = IntParser.GetFormatException();
// return false;
//}
if (IsPositiveInfinity(retVal) || IsNegativeInfinity(retVal))
{
if (!tryParse)
{
exc = new OverflowException();
}
return(false);
}
result = retVal;
return(true);
}
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 = IntParser.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');
ulong v = ((ulong)val) * 10 + d;
if (v > MaxValue)
{
if (!tryParse)
{
exc = IntParser.GetOverflowException();
}
return(false);
}
val = (uint)v;
digits_seen = true;
}
else
{
if (Char.IsWhiteSpace(c))
{
for (i++; i < len; i++)
{
if (!Char.IsWhiteSpace(s[i]))
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
break;
}
else
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = IntParser.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);
}
//#endif
#endregion
#region Parse
internal static bool Parse(string s, bool tryParse, out int result, out Exception exc)
{
int 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 = IntParser.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')
{
i = len;
continue;
}
if (c >= '0' && c <= '9')
{
byte d = (byte)(c - '0');
val = val * 10 + d * sign;
if (IntParser.IsOverflow(val, sign))
{
if (!tryParse)
{
exc = IntParser.GetOverflowException();
}
return(false);
}
digits_seen = true;
}
else
{
if (Char.IsWhiteSpace(c))
{
for (i++; i < len; i++)
{
if (!Char.IsWhiteSpace(s[i]))
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
break;
}
else
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
}
}
if (!digits_seen)
{
if (!tryParse)
{
exc = IntParser.GetFormatException();
}
return(false);
}
result = val;
return(true);
}