| private static TryStringToNumber ( String str, NumberStyles options, NumberBuffer &number, NumberFormatInfo numfmt, Boolean parseDecimal ) : Boolean | ||
| str | String | |
| options | NumberStyles | |
| number | NumberBuffer | |
| numfmt | NumberFormatInfo | |
| parseDecimal | Boolean | |
| return | Boolean | |
internal static unsafe double ParseDouble(string value, NumberStyles options, NumberFormatInfo numfmt)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
byte *stackBuffer = stackalloc byte[Number.NumberBuffer.NumberBufferBytes];
Number.NumberBuffer number = new Number.NumberBuffer(stackBuffer);
double num = 0.0;
if (!Number.TryStringToNumber(value, options, ref number, numfmt, false))
{
string str = value.Trim();
if (str.Equals(numfmt.PositiveInfinitySymbol))
{
return(double.PositiveInfinity);
}
if (str.Equals(numfmt.NegativeInfinitySymbol))
{
return(double.NegativeInfinity);
}
if (str.Equals(numfmt.NaNSymbol))
{
return(double.NaN);
}
throw new FormatException(Environment.GetResourceString("Format_InvalidString"));
}
if (!Number.NumberBufferToDouble(number.PackForNative(), ref num))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Double"));
}
return(num);
}
internal unsafe static bool TryParseSingle(string value, NumberStyles options, NumberFormatInfo numfmt, out float result)
{
byte *stackBuffer = stackalloc byte[checked (unchecked ((UIntPtr)Number.NumberBuffer.NumberBufferBytes) * 1)];
Number.NumberBuffer numberBuffer = new Number.NumberBuffer(stackBuffer);
result = 0f;
double num = 0.0;
if (!Number.TryStringToNumber(value, options, ref numberBuffer, numfmt, false))
{
return(false);
}
if (!Number.NumberBufferToDouble(numberBuffer.PackForNative(), ref num))
{
return(false);
}
float num2 = (float)num;
if (float.IsInfinity(num2))
{
return(false);
}
result = num2;
return(true);
}
internal static unsafe bool TryParseDouble(string value, NumberStyles options, NumberFormatInfo numfmt, out double result)
{
byte *stackBuffer = stackalloc byte[Number.NumberBuffer.NumberBufferBytes];
Number.NumberBuffer number = new Number.NumberBuffer(stackBuffer);
result = 0.0;
return(Number.TryStringToNumber(value, options, ref number, numfmt, false) && Number.NumberBufferToDouble(number.PackForNative(), ref result));
}
internal unsafe static bool TryParseDecimal(string value, NumberStyles options, NumberFormatInfo numfmt, out decimal result)
{
byte *stackBuffer = stackalloc byte[checked (unchecked ((UIntPtr)Number.NumberBuffer.NumberBufferBytes) * 1)];
Number.NumberBuffer numberBuffer = new Number.NumberBuffer(stackBuffer);
result = 0m;
return(Number.TryStringToNumber(value, options, ref numberBuffer, numfmt, true) && Number.NumberBufferToDecimal(numberBuffer.PackForNative(), ref result));
}
internal unsafe static float ParseSingle(string value, NumberStyles options, NumberFormatInfo numfmt)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
byte *stackBuffer = stackalloc byte[checked (unchecked ((UIntPtr)Number.NumberBuffer.NumberBufferBytes) * 1)];
Number.NumberBuffer numberBuffer = new Number.NumberBuffer(stackBuffer);
double num = 0.0;
if (!Number.TryStringToNumber(value, options, ref numberBuffer, numfmt, false))
{
string text = value.Trim();
if (text.Equals(numfmt.PositiveInfinitySymbol))
{
return(float.PositiveInfinity);
}
if (text.Equals(numfmt.NegativeInfinitySymbol))
{
return(float.NegativeInfinity);
}
if (text.Equals(numfmt.NaNSymbol))
{
return(float.NaN);
}
throw new FormatException(Environment.GetResourceString("Format_InvalidString"));
}
else
{
if (!Number.NumberBufferToDouble(numberBuffer.PackForNative(), ref num))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Single"));
}
float num2 = (float)num;
if (float.IsInfinity(num2))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Single"));
}
return(num2);
}
}
internal static unsafe bool TryParseSingle(string value, NumberStyles options, NumberFormatInfo numfmt, out float result)
{
byte *stackBuffer = stackalloc byte[Number.NumberBuffer.NumberBufferBytes];
Number.NumberBuffer number = new Number.NumberBuffer(stackBuffer);
result = 0.0f;
double num = 0.0;
if (!Number.TryStringToNumber(value, options, ref number, numfmt, false) || !Number.NumberBufferToDouble(number.PackForNative(), ref num))
{
return(false);
}
float f = (float)num;
if (float.IsInfinity(f))
{
return(false);
}
result = f;
return(true);
}
internal static unsafe bool TryParseUInt64(string s, NumberStyles style, NumberFormatInfo info, out ulong result)
{
byte *stackBuffer = stackalloc byte[Number.NumberBuffer.NumberBufferBytes];
Number.NumberBuffer number = new Number.NumberBuffer(stackBuffer);
result = 0UL;
if (!Number.TryStringToNumber(s, style, ref number, info, false))
{
return(false);
}
if ((style & NumberStyles.AllowHexSpecifier) != NumberStyles.None)
{
if (!Number.HexNumberToUInt64(ref number, ref result))
{
return(false);
}
}
else if (!Number.NumberToUInt64(ref number, ref result))
{
return(false);
}
return(true);
}
internal unsafe static bool TryParseUInt32(string s, NumberStyles style, NumberFormatInfo info, out uint result)
{
byte *stackBuffer = stackalloc byte[checked (unchecked ((UIntPtr)Number.NumberBuffer.NumberBufferBytes) * 1)];
Number.NumberBuffer numberBuffer = new Number.NumberBuffer(stackBuffer);
result = 0U;
if (!Number.TryStringToNumber(s, style, ref numberBuffer, info, false))
{
return(false);
}
if ((style & NumberStyles.AllowHexSpecifier) != NumberStyles.None)
{
if (!Number.HexNumberToUInt32(ref numberBuffer, ref result))
{
return(false);
}
}
else if (!Number.NumberToUInt32(ref numberBuffer, ref result))
{
return(false);
}
return(true);
}
internal static bool TryStringToNumber(string str, NumberStyles options, ref Number.NumberBuffer number, NumberFormatInfo numfmt, bool parseDecimal)
{
return(Number.TryStringToNumber(str, options, ref number, (StringBuilder)null, numfmt, parseDecimal));
}
