internal static bool Parse(string s, NumberStyles style, IFormatProvider provider, bool tryParse, out uint 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 = Int32.GetFormatException();
}
return(false);
}
NumberFormatInfo nfi = null;
if (provider != null)
{
Type typeNFI = typeof(NumberFormatInfo);
nfi = (NumberFormatInfo)provider.GetFormat(typeNFI);
}
if (nfi == null)
{
nfi = Thread.CurrentThread.CurrentCulture.NumberFormat;
}
if (!Int32.CheckStyle(style, tryParse, ref exc))
{
return(false);
}
bool AllowCurrencySymbol = (style & NumberStyles.AllowCurrencySymbol) != 0;
bool AllowHexSpecifier = (style & NumberStyles.AllowHexSpecifier) != 0;
bool AllowThousands = (style & NumberStyles.AllowThousands) != 0;
bool AllowDecimalPoint = (style & NumberStyles.AllowDecimalPoint) != 0;
bool AllowParentheses = (style & NumberStyles.AllowParentheses) != 0;
bool AllowTrailingSign = (style & NumberStyles.AllowTrailingSign) != 0;
bool AllowLeadingSign = (style & NumberStyles.AllowLeadingSign) != 0;
bool AllowTrailingWhite = (style & NumberStyles.AllowTrailingWhite) != 0;
bool AllowLeadingWhite = (style & NumberStyles.AllowLeadingWhite) != 0;
bool AllowExponent = (style & NumberStyles.AllowExponent) != 0;
int pos = 0;
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
bool foundOpenParentheses = false;
bool negative = false;
bool foundSign = false;
bool foundCurrency = false;
// Pre-number stuff
if (AllowParentheses && s [pos] == '(')
{
foundOpenParentheses = true;
foundSign = true;
negative = true; // MS always make the number negative when there parentheses
// even when NumberFormatInfo.NumberNegativePattern != 0!!!
pos++;
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (s.Substring(pos, nfi.NegativeSign.Length) == nfi.NegativeSign)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (s.Substring(pos, nfi.PositiveSign.Length) == nfi.PositiveSign)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
}
if (AllowLeadingSign && !foundSign)
{
// Sign + Currency
Int32.FindSign(ref pos, s, nfi, ref foundSign, ref negative);
if (foundSign)
{
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (AllowCurrencySymbol)
{
Int32.FindCurrency(ref pos, s, nfi,
ref foundCurrency);
if (foundCurrency && AllowLeadingWhite &&
!Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
}
if (AllowCurrencySymbol && !foundCurrency)
{
// Currency + sign
Int32.FindCurrency(ref pos, s, nfi, ref foundCurrency);
if (foundCurrency)
{
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (foundCurrency)
{
if (!foundSign && AllowLeadingSign)
{
Int32.FindSign(ref pos, s, nfi, ref foundSign,
ref negative);
if (foundSign && AllowLeadingWhite &&
!Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
}
}
uint number = 0;
int nDigits = 0;
int decimalPointPos = -1;
uint digitValue;
char hexDigit;
// Number stuff
// Just the same as Int32, but this one adds instead of substract
while (pos < s.Length)
{
if (!Int32.ValidDigit(s [pos], AllowHexSpecifier))
{
if (AllowThousands &&
(Int32.FindOther(ref pos, s, nfi.NumberGroupSeparator) ||
Int32.FindOther(ref pos, s, nfi.CurrencyGroupSeparator)))
{
continue;
}
if (AllowDecimalPoint && decimalPointPos < 0 &&
(Int32.FindOther(ref pos, s, nfi.NumberDecimalSeparator) ||
Int32.FindOther(ref pos, s, nfi.CurrencyDecimalSeparator)))
{
decimalPointPos = nDigits;
continue;
}
break;
}
nDigits++;
if (AllowHexSpecifier)
{
hexDigit = s [pos++];
if (Char.IsDigit(hexDigit))
{
digitValue = (uint)(hexDigit - '0');
}
else if (Char.IsLower(hexDigit))
{
digitValue = (uint)(hexDigit - 'a' + 10);
}
else
{
digitValue = (uint)(hexDigit - 'A' + 10);
}
if (tryParse)
{
ulong l = number * 16 + digitValue;
if (l > MaxValue)
{
return(false);
}
number = (uint)l;
}
else
{
number = checked (number * 16 + digitValue);
}
continue;
}
try {
number = checked (number * 10 + (uint)(s [pos++] - '0'));
} catch (OverflowException) {
if (!tryParse)
{
exc = new OverflowException(Locale.GetText("Value too large or too small."));
}
return(false);
}
}
// Post number stuff
if (nDigits == 0)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
int exponent = 0;
if (AllowExponent)
{
if (Int32.FindExponent(ref pos, s, ref exponent, tryParse, ref exc) && exc != null)
{
return(false);
}
}
if (AllowTrailingSign && !foundSign)
{
// Sign + Currency
Int32.FindSign(ref pos, s, nfi, ref foundSign, ref negative);
if (foundSign && pos < s.Length)
{
if (AllowTrailingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
if (AllowCurrencySymbol && !foundCurrency)
{
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
// Currency + sign
Int32.FindCurrency(ref pos, s, nfi, ref foundCurrency);
if (foundCurrency && pos < s.Length)
{
if (AllowTrailingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (!foundSign && AllowTrailingSign)
{
Int32.FindSign(ref pos, s, nfi, ref foundSign,
ref negative);
}
}
}
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
if (foundOpenParentheses)
{
if (pos >= s.Length || s [pos++] != ')')
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
}
if (pos < s.Length && s [pos] != '\u0000')
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
// -0 is legal but other negative values are not
if (negative && (number > 0))
{
if (!tryParse)
{
exc = new OverflowException(
Locale.GetText("Negative number"));
}
return(false);
}
if (decimalPointPos >= 0)
{
exponent = exponent - nDigits + decimalPointPos;
}
if (exponent < 0)
{
//
// Any non-zero values after decimal point are not allowed
//
long remainder;
number = (uint)Math.DivRem(number, (int)Math.Pow(10, -exponent), out remainder);
if (remainder != 0)
{
if (!tryParse)
{
exc = new OverflowException("Value too large or too small.");
}
return(false);
}
}
else if (exponent > 0)
{
//
// result *= 10^exponent
//
// Reduce the risk of throwing an overflow exc
//
double res = checked (Math.Pow(10, exponent) * number);
if (res < MinValue || res > MaxValue)
{
if (!tryParse)
{
exc = new OverflowException("Value too large or too small.");
}
return(false);
}
number = (uint)res;
}
result = number;
return(true);
}
internal static bool Parse(string s, NumberStyles style, IFormatProvider fp, bool tryParse, out long 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 = Int32.GetFormatException();
}
return(false);
}
NumberFormatInfo nfi = null;
if (fp != null)
{
Type typeNFI = typeof(System.Globalization.NumberFormatInfo);
nfi = (NumberFormatInfo)fp.GetFormat(typeNFI);
}
if (nfi == null)
{
nfi = Thread.CurrentThread.CurrentCulture.NumberFormat;
}
if (!Int32.CheckStyle(style, tryParse, ref exc))
{
return(false);
}
bool AllowCurrencySymbol = (style & NumberStyles.AllowCurrencySymbol) != 0;
bool AllowHexSpecifier = (style & NumberStyles.AllowHexSpecifier) != 0;
bool AllowThousands = (style & NumberStyles.AllowThousands) != 0;
bool AllowDecimalPoint = (style & NumberStyles.AllowDecimalPoint) != 0;
bool AllowParentheses = (style & NumberStyles.AllowParentheses) != 0;
bool AllowTrailingSign = (style & NumberStyles.AllowTrailingSign) != 0;
bool AllowLeadingSign = (style & NumberStyles.AllowLeadingSign) != 0;
bool AllowTrailingWhite = (style & NumberStyles.AllowTrailingWhite) != 0;
bool AllowLeadingWhite = (style & NumberStyles.AllowLeadingWhite) != 0;
bool AllowExponent = (style & NumberStyles.AllowExponent) != 0;
int pos = 0;
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
bool foundOpenParentheses = false;
bool negative = false;
bool foundSign = false;
bool foundCurrency = false;
// Pre-number stuff
if (AllowParentheses && s [pos] == '(')
{
foundOpenParentheses = true;
foundSign = true;
negative = true; // MS always make the number negative when there parentheses
// even when NumberFormatInfo.NumberNegativePattern != 0!!!
pos++;
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (s.Substring(pos, nfi.NegativeSign.Length) == nfi.NegativeSign)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (s.Substring(pos, nfi.PositiveSign.Length) == nfi.PositiveSign)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
}
if (AllowLeadingSign && !foundSign)
{
// Sign + Currency
Int32.FindSign(ref pos, s, nfi, ref foundSign, ref negative);
if (foundSign)
{
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (AllowCurrencySymbol)
{
Int32.FindCurrency(ref pos, s, nfi,
ref foundCurrency);
if (foundCurrency && AllowLeadingWhite &&
!Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
}
if (AllowCurrencySymbol && !foundCurrency)
{
// Currency + sign
Int32.FindCurrency(ref pos, s, nfi, ref foundCurrency);
if (foundCurrency)
{
if (AllowLeadingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (foundCurrency)
{
if (!foundSign && AllowLeadingSign)
{
Int32.FindSign(ref pos, s, nfi, ref foundSign,
ref negative);
if (foundSign && AllowLeadingWhite &&
!Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
}
}
long number = 0;
int nDigits = 0;
bool decimalPointFound = false;
int digitValue;
char hexDigit;
int exponent = 0;
// Number stuff
do
{
if (!Int32.ValidDigit(s [pos], AllowHexSpecifier))
{
if (AllowThousands &&
(Int32.FindOther(ref pos, s, nfi.NumberGroupSeparator) ||
Int32.FindOther(ref pos, s, nfi.CurrencyGroupSeparator)))
{
continue;
}
else
if (!decimalPointFound && AllowDecimalPoint &&
(Int32.FindOther(ref pos, s, nfi.NumberDecimalSeparator) ||
Int32.FindOther(ref pos, s, nfi.CurrencyDecimalSeparator)))
{
decimalPointFound = true;
continue;
}
break;
}
if (AllowHexSpecifier)
{
nDigits++;
hexDigit = s [pos++];
if (Char.IsDigit(hexDigit))
{
digitValue = (int)(hexDigit - '0');
}
else if (Char.IsLower(hexDigit))
{
digitValue = (int)(hexDigit - 'a' + 10);
}
else
{
digitValue = (int)(hexDigit - 'A' + 10);
}
ulong unumber = (ulong)number;
// IMPROVME: We could avoid catching OverflowException
try {
number = (long)checked (unumber * 16ul + (ulong)digitValue);
} catch (OverflowException e) {
if (!tryParse)
{
exc = e;
}
return(false);
}
}
else if (decimalPointFound)
{
nDigits++;
// Allows decimal point as long as it's only
// followed by zeroes.
if (s [pos++] != '0')
{
if (!tryParse)
{
exc = new OverflowException("Value too large or too " +
"small.");
}
return(false);
}
}
else
{
nDigits++;
try {
// Calculations done as negative
// (abs (MinValue) > abs (MaxValue))
number = checked (
number * 10 -
(long)(s [pos++] - '0')
);
} catch (OverflowException) {
if (!tryParse)
{
exc = new OverflowException("Value too large or too " +
"small.");
}
return(false);
}
}
} while (pos < s.Length);
// Post number stuff
if (nDigits == 0)
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (AllowExponent)
{
if (Int32.FindExponent(ref pos, s, ref exponent, tryParse, ref exc) && exc != null)
{
return(false);
}
}
if (AllowTrailingSign && !foundSign)
{
// Sign + Currency
Int32.FindSign(ref pos, s, nfi, ref foundSign, ref negative);
if (foundSign && pos < s.Length)
{
if (AllowTrailingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
}
}
if (AllowCurrencySymbol && !foundCurrency)
{
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
// Currency + sign
Int32.FindCurrency(ref pos, s, nfi, ref foundCurrency);
if (foundCurrency && pos < s.Length)
{
if (AllowTrailingWhite && !Int32.JumpOverWhite(ref pos, s, true, tryParse, ref exc))
{
return(false);
}
if (!foundSign && AllowTrailingSign)
{
Int32.FindSign(ref pos, s, nfi, ref foundSign,
ref negative);
}
}
}
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
if (foundOpenParentheses)
{
if (pos >= s.Length || s [pos++] != ')')
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (AllowTrailingWhite && pos < s.Length && !Int32.JumpOverWhite(ref pos, s, false, tryParse, ref exc))
{
return(false);
}
}
if (pos < s.Length && s [pos] != '\u0000')
{
if (!tryParse)
{
exc = Int32.GetFormatException();
}
return(false);
}
if (!negative && !AllowHexSpecifier)
{
try {
number = checked (-number);
} catch (OverflowException e) {
if (!tryParse)
{
exc = e;
}
return(false);
}
}
// result *= 10^exponent
if (exponent > 0)
{
// Reduce the risk of throwing an overflow exc
double res = checked (Math.Pow(10, exponent) * number);
if (res < Int32.MinValue || res > Int32.MaxValue)
{
if (!tryParse)
{
exc = new OverflowException("Value too large or too small.");
}
return(false);
}
number = (long)res;
}
result = number;
return(true);
}