private static unsafe void DoubleToNumber(double value, int precision, ref NumberBuffer number)
{
number.precision = precision;
if (!Double.IsFinite(value))
{
number.scale = Double.IsNaN(value) ? ScaleNAN : ScaleINF;
number.sign = Double.IsNegative(value);
number.digits[0] = '\0';
}
else
{
byte *src = stackalloc byte[_CVTBUFSIZE];
int sign;
fixed(NumberBuffer *pNumber = &number)
{
RuntimeImports._ecvt_s(src, _CVTBUFSIZE, value, precision, &pNumber->scale, &sign);
}
number.sign = sign != 0;
char *dst = number.digits;
if ((char)*src != '0')
{
while (*src != 0)
{
*dst++ = (char)*src++;
}
}
*dst = '\0';
}
}
internal static bool TryParseInt32(ReadOnlySpan <char> s, NumberStyles style, NumberFormatInfo info, out int result)
{
NumberBuffer number = default;
result = 0;
if ((style & ~NumberStyles.Integer) == 0)
{
// Optimized path for the common case of anything that's allowed for integer style.
return(TryParseInt32IntegerStyle(s, style, info, out result, out _));
}
if (!TryStringToNumber(s, style, ref number, info, false))
{
return(false);
}
if ((style & NumberStyles.AllowHexSpecifier) != 0)
{
if (!HexNumberToInt32(ref number, ref result))
{
return(false);
}
}
else
{
if (!NumberToInt32(ref number, ref result))
{
return(false);
}
}
return(true);
}
private static unsafe bool NumberToUInt64(ref NumberBuffer number, ref ulong value)
{
int scale = number.scale;
if (((scale > 20) || (scale < number.precision)) || number.sign)
{
return(false);
}
char *digits = number.digits;
ulong num2 = 0L;
while (--scale >= 0)
{
if (num2 > 0x1999999999999999L)
{
return(false);
}
num2 *= (ulong)10L;
if (digits[0] != '\0')
{
digits++;
ulong num3 = num2 + (digits[0] - '0');
if (num3 < num2)
{
return(false);
}
num2 = num3;
}
}
value = num2;
return(true);
}
public static String FormatDecimal(Decimal value, String format, IFormatProvider provider)
{
NumberFormatInfo info = provider == null ? NumberFormatInfo.CurrentInfo : NumberFormatInfo.GetInstance(provider);
NumberBuffer number = new NumberBuffer();
DecimalToNumber(value, ref number);
int digits;
char fmt = ParseFormatSpecifier(format, out digits);
ValueStringBuilder sb;
unsafe
{
char *stackPtr = stackalloc char[CharStackBufferSize];
sb = new ValueStringBuilder(new Span <char>(stackPtr, CharStackBufferSize));
}
if (fmt != 0)
{
NumberToString(ref sb, ref number, fmt, digits, info, true);
}
else
{
NumberToStringFormat(ref sb, ref number, format, info);
}
return(sb.GetString());
}
internal static unsafe int ParseInt32(string s, NumberStyles style, NumberFormatInfo info)
{
fixed(byte *numberBufferBytes = new byte[NumberBuffer.NumberBufferBytes])
{
NumberBuffer number = new NumberBuffer(numberBufferBytes);
int i = 0;
StringToNumber(s, style, ref number, info, false);
if ((style & NumberStyles.AllowHexSpecifier) != 0)
{
if (!HexNumberToInt32(ref number, ref i))
{
throw new OverflowException(SR.Overflow_Int32);
}
}
else
{
if (!NumberToInt32(ref number, ref i))
{
throw new OverflowException(SR.Overflow_Int32);
}
}
return(i);
}
}
private static unsafe bool NumberToUInt64(ref NumberBuffer number, ref ulong value)
{
int i = number.scale;
if (i > UInt64Precision || i < number.precision || number.sign)
{
return(false);
}
char *p = number.digits;
Debug.Assert(p != null);
ulong n = 0;
while (--i >= 0)
{
if (n > (0xFFFFFFFFFFFFFFFF / 10))
{
return(false);
}
n *= 10;
if (*p != '\0')
{
ulong newN = n + (ulong)(*p++ - '0');
// Detect an overflow here...
if (newN < n)
{
return(false);
}
n = newN;
}
}
value = n;
return(true);
}
internal static unsafe double ParseDouble(string value, NumberStyles options, NumberFormatInfo numfmt)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
byte * stackBuffer = stackalloc byte[0x72];
NumberBuffer number = new NumberBuffer(stackBuffer);
double num = 0.0;
if (!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))
{
throw new FormatException(Environment.GetResourceString("Format_InvalidString"));
}
return(double.NaN);
}
if (!NumberBufferToDouble(number.PackForNative(), ref num))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Double"));
}
return(num);
}
internal static unsafe bool TryParseUInt64(string s, NumberStyles style, NumberFormatInfo info, out ulong result)
{
fixed(byte *numberBufferBytes = new byte[NumberBuffer.NumberBufferBytes])
{
NumberBuffer number = new NumberBuffer(numberBufferBytes);
result = 0;
if (!TryStringToNumber(s, style, ref number, info, false))
{
return(false);
}
if ((style & NumberStyles.AllowHexSpecifier) != 0)
{
if (!HexNumberToUInt64(ref number, ref result))
{
return(false);
}
}
else
{
if (!NumberToUInt64(ref number, ref result))
{
return(false);
}
}
return(true);
}
}
internal static unsafe bool TryParseSingle(ReadOnlySpan <char> value, NumberStyles options, NumberFormatInfo numfmt, out float result)
{
NumberBuffer number = default;
result = 0;
double d = 0;
if (!TryStringToNumber(value, options, ref number, numfmt, false))
{
return(false);
}
if (!NumberBufferToDouble(ref number, ref d))
{
return(false);
}
float castSingle = (float)d;
if (float.IsInfinity(castSingle))
{
return(false);
}
result = castSingle;
return(true);
}
private unsafe static Boolean NumberToUInt64(ref NumberBuffer number, ref UInt64 value)
{
Int32 i = number.scale;
if (i > UInt64Precision || i < number.precision || number.sign)
{
return(false);
}
char *p = number.digits;
Debug.Assert(p != null, "");
UInt64 n = 0;
while (--i >= 0)
{
if (n > (0xFFFFFFFFFFFFFFFF / 10))
{
return(false);
}
n *= 10;
if (*p != '\0')
{
UInt64 newN = n + (UInt64)(*p++ - '0');
// Detect an overflow here...
if (newN < n)
{
return(false);
}
n = newN;
}
}
value = n;
return(true);
}
internal static unsafe ulong ParseUInt64(string value, NumberStyles options, NumberFormatInfo numfmt)
{
fixed(byte *numberBufferBytes = new byte[NumberBuffer.NumberBufferBytes])
{
NumberBuffer number = new NumberBuffer(numberBufferBytes);
ulong i = 0;
StringToNumber(value, options, ref number, numfmt, false);
if ((options & NumberStyles.AllowHexSpecifier) != 0)
{
if (!HexNumberToUInt64(ref number, ref i))
{
throw new OverflowException(SR.Overflow_UInt64);
}
}
else
{
if (!NumberToUInt64(ref number, ref i))
{
throw new OverflowException(SR.Overflow_UInt64);
}
}
return(i);
}
}
private static unsafe void DoubleToNumber(double value, int precision, ref NumberBuffer number)
{
number.precision = precision;
if (DoubleHelper.Exponent(value) == 0x7ff)
{
number.scale = DoubleHelper.Mantissa(value) != 0 ? ScaleNAN : ScaleINF;
number.sign = DoubleHelper.Sign(value);
number.digits[0] = '\0';
}
else
{
byte *src = stackalloc byte[_CVTBUFSIZE];
int sign;
fixed(NumberBuffer *pNumber = &number)
{
RuntimeImports._ecvt_s(src, _CVTBUFSIZE, value, precision, &pNumber->scale, &sign);
}
number.sign = sign != 0;
char *dst = number.digits;
if ((char)*src != '0')
{
while (*src != 0)
{
*dst++ = (char)*src++;
}
}
*dst = '\0';
}
}
internal static unsafe bool TryParseSingle(string value, NumberStyles options, NumberFormatInfo numfmt, out float result)
{
fixed(byte *numberBufferBytes = new byte[NumberBuffer.NumberBufferBytes])
{
NumberBuffer number = new NumberBuffer(numberBufferBytes);
result = 0;
double d = 0;
if (!TryStringToNumber(value, options, ref number, numfmt, false))
{
return(false);
}
if (!NumberBufferToDouble(number, ref d))
{
return(false);
}
float castSingle = (float)d;
if (float.IsInfinity(castSingle))
{
return(false);
}
result = castSingle;
return(true);
}
}
internal static unsafe bool TryParseInt64(ReadOnlySpan <char> s, NumberStyles style, NumberFormatInfo info, out long result)
{
NumberBuffer number = default;
result = 0;
if (!TryStringToNumber(s, style, ref number, info, false))
{
return(false);
}
if ((style & NumberStyles.AllowHexSpecifier) != 0)
{
if (!HexNumberToInt64(ref number, ref result))
{
return(false);
}
}
else
{
if (!NumberToInt64(ref number, ref result))
{
return(false);
}
}
return(true);
}
internal static unsafe bool TryParseSingle(string value, NumberStyles options, NumberFormatInfo numfmt, out float result)
{
byte * stackBuffer = stackalloc byte[1 * 0x72];
NumberBuffer number = new NumberBuffer(stackBuffer);
result = 0f;
double num = 0.0;
if (!TryStringToNumber(value, options, ref number, numfmt, false))
{
return(false);
}
if (!NumberBufferToDouble(number.PackForNative(), ref num))
{
return(false);
}
float f = (float)num;
if (float.IsInfinity(f))
{
return(false);
}
result = f;
return(true);
}
public static bool TryRunSingle(float value, int requestedDigits, ref NumberBuffer number)
{
float v = float.IsNegative(value) ? -value : value;
Debug.Assert(v > 0);
Debug.Assert(float.IsFinite(v));
int length;
int decimalExponent;
bool result;
if (requestedDigits == -1)
{
DiyFp w = DiyFp.CreateAndGetBoundaries(v, out DiyFp boundaryMinus, out DiyFp boundaryPlus).Normalize();
result = TryRunShortest(in boundaryMinus, in w, in boundaryPlus, number.Digits, out length, out decimalExponent);
}
else
{
DiyFp w = new DiyFp(v).Normalize();
result = TryRunCounted(in w, requestedDigits, number.Digits, out length, out decimalExponent);
}
if (result)
{
Debug.Assert((requestedDigits == -1) || (length == requestedDigits));
number.Scale = length + decimalExponent;
number.Digits[length] = (byte)('\0');
number.DigitsCount = length;
}
return(result);
}
internal static unsafe double ParseDouble(ReadOnlySpan <char> value, NumberStyles options, NumberFormatInfo numfmt)
{
NumberBuffer number = default;
double d = 0;
if (!TryStringToNumber(value, options, ref number, numfmt, false))
{
//If we failed TryStringToNumber, it may be from one of our special strings.
//Check the three with which we're concerned and rethrow if it's not one of
//those strings.
ReadOnlySpan <char> sTrim = value.Trim();
if (sTrim.EqualsOrdinal(numfmt.PositiveInfinitySymbol))
{
return(double.PositiveInfinity);
}
if (sTrim.EqualsOrdinal(numfmt.NegativeInfinitySymbol))
{
return(double.NegativeInfinity);
}
if (sTrim.EqualsOrdinal(numfmt.NaNSymbol))
{
return(double.NaN);
}
throw new FormatException(SR.Format_InvalidString);
}
if (!NumberBufferToDouble(ref number, ref d))
{
throw new OverflowException(SR.Overflow_Double);
}
return(d);
}
private static Boolean HexNumberToInt64(ref NumberBuffer number, ref Int64 value)
{
UInt64 passedValue = 0;
Boolean returnValue = HexNumberToUInt64(ref number, ref passedValue);
value = (Int64)passedValue;
return(returnValue);
}
private static bool HexNumberToInt32(ref NumberBuffer number, ref int value)
{
uint num = 0;
bool flag = HexNumberToUInt32(ref number, ref num);
value = (int)num;
return(flag);
}
private static bool HexNumberToInt64(ref NumberBuffer number, ref long value)
{
ulong passedValue = 0;
bool returnValue = HexNumberToUInt64(ref number, ref passedValue);
value = (long)passedValue;
return(returnValue);
}
private static bool HexNumberToInt64(ref NumberBuffer number, ref long value)
{
ulong num = 0L;
bool flag = HexNumberToUInt64(ref number, ref num);
value = (long)num;
return(flag);
}
private static bool HexNumberToInt32(ref NumberBuffer number, ref int value)
{
uint passedValue = 0;
bool returnValue = HexNumberToUInt32(ref number, ref passedValue);
value = (int)passedValue;
return(returnValue);
}
private static unsafe bool HexNumberToUInt32(ref NumberBuffer number, ref uint value)
{
int i = number.scale;
if (i > UInt32Precision || i < number.precision)
{
return(false);
}
char *p = number.digits;
Debug.Assert(p != null);
uint n = 0;
while (--i >= 0)
{
if (n > ((uint)0xFFFFFFFF / 16))
{
return(false);
}
n *= 16;
if (*p != '\0')
{
uint newN = n;
if (*p != '\0')
{
if (*p >= '0' && *p <= '9')
{
newN += (uint)(*p - '0');
}
else
{
if (*p >= 'A' && *p <= 'F')
{
newN += (uint)((*p - 'A') + 10);
}
else
{
Debug.Assert(*p >= 'a' && *p <= 'f');
newN += (uint)((*p - 'a') + 10);
}
}
p++;
}
// Detect an overflow here...
if (newN < n)
{
return(false);
}
n = newN;
}
}
value = n;
return(true);
}
private unsafe static Boolean HexNumberToUInt32(ref NumberBuffer number, ref UInt32 value)
{
Int32 i = number.scale;
if (i > UInt32Precision || i < number.precision)
{
return(false);
}
Char *p = number.digits;
Debug.Assert(p != null, "");
UInt32 n = 0;
while (--i >= 0)
{
if (n > ((UInt32)0xFFFFFFFF / 16))
{
return(false);
}
n *= 16;
if (*p != '\0')
{
UInt32 newN = n;
if (*p != '\0')
{
if (*p >= '0' && *p <= '9')
{
newN += (UInt32)(*p - '0');
}
else
{
if (*p >= 'A' && *p <= 'F')
{
newN += (UInt32)((*p - 'A') + 10);
}
else
{
Debug.Assert(*p >= 'a' && *p <= 'f', "");
newN += (UInt32)((*p - 'a') + 10);
}
}
p++;
}
// Detect an overflow here...
if (newN < n)
{
return(false);
}
n = newN;
}
}
value = n;
return(true);
}
internal static unsafe double ParseDouble(string value, NumberStyles options, NumberFormatInfo numfmt)
{
byte * stackBuffer = stackalloc byte[1 * 0x72];
NumberBuffer number = new NumberBuffer(stackBuffer);
double num = 0.0;
StringToNumber(value, options, ref number, numfmt, false);
if (!NumberBufferToDouble(number.PackForNative(), ref num))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Double"));
}
return(num);
}
internal unsafe static decimal ParseDecimal(ReadOnlySpan <char> value, NumberStyles options, NumberFormatInfo numfmt)
{
NumberBuffer number = default;
decimal result = 0;
StringToNumber(value, options, ref number, numfmt, true);
if (!NumberBufferToDecimal(ref number, ref result))
{
throw new OverflowException(SR.Overflow_Decimal);
}
return(result);
}
internal static unsafe decimal ParseDecimal(string value, NumberStyles options, NumberFormatInfo numfmt)
{
byte * stackBuffer = stackalloc byte[0x72];
NumberBuffer number = new NumberBuffer(stackBuffer);
decimal num = 0M;
StringToNumber(value, options, ref number, numfmt, true);
if (!NumberBufferToDecimal(number.PackForNative(), ref num))
{
throw new OverflowException(Environment.GetResourceString("Overflow_Decimal"));
}
return(num);
}
internal static unsafe decimal ParseDecimal(string value, NumberStyles options, NumberFormatInfo numfmt)
{
fixed(byte *numberBufferBytes = new byte[NumberBuffer.NumberBufferBytes])
{
NumberBuffer number = new NumberBuffer(numberBufferBytes);
decimal result = 0;
StringToNumber(value, options, ref number, numfmt, true);
if (!NumberBufferToDecimal(number, ref result))
{
throw new OverflowException(SR.Overflow_Decimal);
}
return(result);
}
}
internal static unsafe bool TryParseDouble(string value, NumberStyles options, NumberFormatInfo numfmt, out double result)
{
byte * stackBuffer = stackalloc byte[1 * 0x72];
NumberBuffer number = new NumberBuffer(stackBuffer);
result = 0.0;
if (!TryStringToNumber(value, options, ref number, numfmt, false))
{
return(false);
}
if (!NumberBufferToDouble(number.PackForNative(), ref result))
{
return(false);
}
return(true);
}
//
// This method is copied directly from CoreRT (which is in turn a C#-ized version of the CoreCLR C++ code.)
//
public static void RoundNumber(ref NumberBuffer number, int pos)
{
number.CheckConsistency();
Span <byte> digits = number.Digits;
int i = 0;
while (i < pos && digits[i] != 0)
{
i++;
}
if (i == pos && digits[i] >= (byte)'5')
{
while (i > 0 && digits[i - 1] == (byte)'9')
{
i--;
}
if (i > 0)
{
digits[i - 1]++;
}
else
{
number.Scale++;
digits[0] = (byte)'1';
i = 1;
}
}
else
{
while (i > 0 && digits[i - 1] == (byte)'0')
{
i--;
}
}
if (i == 0)
{
number.Scale = 0;
number.IsNegative = false;
}
digits[i] = 0;
number.CheckConsistency();
}
