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Add casting from Decimal to big integers and big binary floating point numbers #29

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d249835
-Added cast from Decimal(32/64/128) to big integers.
crookseta Aug 16, 2026
2c72a60
Added IEEE Decimal constant values for testing Quad and Octo.
crookseta Aug 16, 2026
42603b1
Merge branch 'version-3.0' into ieeedecimal-conversions
crookseta Aug 18, 2026
e533eb9
Merge branch 'refs/heads/version-3.0' into ieeedecimal-conversions
crookseta Sep 17, 2026
0b0efb2
-Added support for IEEE Decimal types on generic Create methods
crookseta Sep 17, 2026
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121 changes: 119 additions & 2 deletions src/MissingValues/Int256.Conversions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,11 @@ private static bool TryConvertFromChecked<TOther>(TOther value, out Int256 resul
float actual => (Int256)actual,
double actual => (Int256)actual,
NFloat actual => (Int256)actual,
#if NET11_0_OR_GREATER
Decimal32 actual => (Int256)actual,
Decimal64 actual => (Int256)actual,
Decimal128 actual => (Int256)actual,
#endif
decimal actual => (Int256)actual,
byte actual => (Int256)actual,
ushort actual => (Int256)actual,
Expand Down Expand Up @@ -112,10 +117,16 @@ private static bool TryConvertFromSaturating<TOther>(TOther value, out Int256 re
result = value switch
{
char actual => actual,
Half actual => (Int256)actual,
float actual => (Int256)actual,
Half actual => (Half.IsPositiveInfinity(actual)) ? MaxValue : (Half.IsNegativeInfinity(actual)) ? MinValue : (Int256)actual,
float actual => (float.IsPositiveInfinity(actual)) ? MaxValue : (float.IsNegativeInfinity(actual)) ? MinValue : (Int256)actual,
double actual => (actual <= -TwoPow255) ? MinValue : (actual > +TwoPow255) ? MaxValue : (Int256)actual,
NFloat actual => (actual <= -TwoPow255) ? MinValue : (actual > +TwoPow255) ? MaxValue : (Int256)actual,
#if NET11_0_OR_GREATER
// 2^255 in Binary Encoding
Decimal32 actual => (actual <= Decimal32.DecodeBinary(0xD5D8_57A4)) ? MinValue : (actual > Decimal32.DecodeBinary(0x55D8_57A4)) ? MaxValue : (Int256)actual,
Decimal64 actual => (actual <= Decimal64.DecodeBinary(0xB974_919D_5556_EB52)) ? MinValue : (actual > Decimal64.DecodeBinary(0x3974_919D_5556_EB52)) ? MaxValue : (Int256)actual,
Decimal128 actual => (actual <= Decimal128.DecodeBinary(new UInt128(0xB097_1D73_14F5_34B6, 0x09C6_EFE6_C11D_255B))) ? MinValue : (actual > Decimal128.DecodeBinary(new UInt128(0x3097_1D73_14F5_34B6, 0x09C6_EFE6_C11D_255B))) ? MaxValue : (Int256)actual,
#endif
decimal actual => (Int256)actual,
byte actual => (Int256)actual,
ushort actual => (Int256)actual,
Expand Down Expand Up @@ -152,6 +163,12 @@ private static bool TryConvertFromTruncating<TOther>(TOther value, out Int256 re
float actual => (float.IsPositiveInfinity(actual)) ? MaxValue : (float.IsNegativeInfinity(actual)) ? MinValue : (Int256)actual,
double actual => (actual <= -TwoPow255) ? MinValue : (actual > +TwoPow255) ? MaxValue : (Int256)actual,
NFloat actual => (actual <= -TwoPow255) ? MinValue : (actual > +TwoPow255) ? MaxValue : (Int256)actual,
#if NET11_0_OR_GREATER
// 2^255 in Binary Encoding
Decimal32 actual => (actual <= Decimal32.DecodeBinary(0xD5D8_57A4)) ? MinValue : (actual > Decimal32.DecodeBinary(0x55D8_57A4)) ? MaxValue : (Int256)actual,
Decimal64 actual => (actual <= Decimal64.DecodeBinary(0xB974_919D_5556_EB52)) ? MinValue : (actual > Decimal64.DecodeBinary(0x3974_919D_5556_EB52)) ? MaxValue : (Int256)actual,
Decimal128 actual => (actual <= Decimal128.DecodeBinary(new UInt128(0xB097_1D73_14F5_34B6, 0x09C6_EFE6_C11D_255B))) ? MinValue : (actual > Decimal128.DecodeBinary(new UInt128(0x3097_1D73_14F5_34B6, 0x09C6_EFE6_C11D_255B))) ? MaxValue : (Int256)actual,
#endif
decimal actual => (Int128)actual,
byte actual => (Int256)actual,
ushort actual => (Int256)actual,
Expand Down Expand Up @@ -186,6 +203,11 @@ static bool INumberBase<Int256>.TryConvertToChecked<TOther>(Int256 value, out TO
float => (TOther)(object)(float)value,
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)(byte)value,
ushort => (TOther)(object)(ushort)value,
Expand Down Expand Up @@ -223,6 +245,11 @@ static bool INumberBase<Int256>.TryConvertToSaturating<TOther>(Int256 value, out
float => (TOther)(object)(float)value,
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)((value >= (Int256)byte.MaxValue) ? byte.MaxValue : (value <= (Int256)byte.MinValue) ? byte.MinValue : (byte)value),
ushort => (TOther)(object)((value >= (Int256)ushort.MaxValue) ? ushort.MaxValue : (value <= (Int256)ushort.MinValue) ? ushort.MinValue : (ushort)value),
Expand Down Expand Up @@ -258,6 +285,11 @@ static bool INumberBase<Int256>.TryConvertToTruncating<TOther>(Int256 value, out
float => (TOther)(object)(float)value,
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)(byte)value,
ushort => (TOther)(object)(ushort)value,
Expand Down Expand Up @@ -645,6 +677,34 @@ public static explicit operator decimal(in Int256 value)
}
return (decimal)(double)(UInt256)(value);
}

#if NET11_0_OR_GREATER
/// <summary>
/// Explicitly converts a <see cref="Int256" /> value to a <see cref="Decimal32"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal32(in Int256 value)
{
return BitHelper.ConvertToDecimalN<Decimal32, Int256>(in value);
}
/// <summary>
/// Explicitly converts a <see cref="Int256" /> value to a <see cref="Decimal64"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal64(in Int256 value)
{
return BitHelper.ConvertToDecimalN<Decimal64, Int256>(in value);
}
/// <summary>
/// Explicitly converts a <see cref="Int256" /> value to a <see cref="Decimal128"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal128(in Int256 value)
{
return BitHelper.ConvertToDecimalN<Decimal128, Int256>(in value);
}
#endif

/// <summary>
/// Explicitly converts a <see cref="Int256" /> value to a <see cref="Octo"/>.
/// </summary>
Expand Down Expand Up @@ -872,6 +932,63 @@ public static explicit operator checked Int256(BigInteger value)
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int256"/>.</exception>
public static explicit operator checked Int256(decimal value) => checked((Int256)(double)value);

#if NET11_0_OR_GREATER
/// <summary>
/// Explicitly converts a <see cref="Decimal32" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int256(Decimal32 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal32>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal32" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int256"/>.</exception>
public static explicit operator checked Int256(Decimal32 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal32>(value, true);
}

/// <summary>
/// Explicitly converts a <see cref="Decimal64" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int256(Decimal64 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal64>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal64" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int256"/>.</exception>
public static explicit operator checked Int256(Decimal64 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal64>(value, true);
}

/// <summary>
/// Explicitly converts a <see cref="Decimal128" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int256(Decimal128 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal128>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal128" /> value to a <see cref="Int256"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int256"/>.</exception>
public static explicit operator checked Int256(Decimal128 value)
{
return BitHelper.ConvertFromDecimalN<Int256, Decimal128>(value, true);
}
#endif

/// <summary>
/// Explicitly converts a <see cref="double" /> value to a <see cref="Int256"/>.
/// </summary>
Expand Down
119 changes: 117 additions & 2 deletions src/MissingValues/Int512.Conversions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,11 @@ private static bool TryConvertFromChecked<TOther>(TOther value, out Int512 resul
double actual => (Int512)actual,
NFloat actual => (Int512)actual,
Quad actual => (Int512)actual,
#if NET11_0_OR_GREATER
Decimal32 actual => (Int512)actual,
Decimal64 actual => (Int512)actual,
Decimal128 actual => (Int512)actual,
#endif
decimal actual => (Int512)actual,
byte actual => (Int512)actual,
ushort actual => (Int512)actual,
Expand Down Expand Up @@ -117,7 +122,12 @@ private static bool TryConvertFromSaturating<TOther>(TOther value, out Int512 re
float actual => (float.IsPositiveInfinity(actual)) ? MaxValue : (float.IsNegativeInfinity(actual)) ? MinValue : (Int512)actual,
double actual => (actual <= -TwoPow511) ? MinValue : (actual > +TwoPow511) ? MaxValue : (Int512)actual,
NFloat actual => (actual <= -TwoPow511) ? MinValue : (actual > +TwoPow511) ? MaxValue : (Int512)actual,
Quad actual => (actual <= (new Quad(0xC1FE_0000_0000_0000, 0x0000_0000_0000_0000))) ? MinValue : (actual > (new Quad(0x41FE_0000_0000_0000, 0x0000_0000_0000_0000))) ? MaxValue : (Int512)actual,
#if NET11_0_OR_GREATER
// 2^511 in Binary Encoding
Decimal32 actual => (Decimal32.IsPositiveInfinity(actual)) ? MaxValue : (Decimal32.IsNegativeInfinity(actual)) ? MinValue : (Int256)actual,
Decimal64 actual => (actual <= Decimal64.DecodeBinary(14057934741360918819)) ? MinValue : (actual > Decimal64.DecodeBinary(4834562704506143011)) ? MaxValue : (Int256)actual,
Decimal128 actual => (actual <= Decimal128.DecodeBinary(new UInt128(0xB131_4A87_29FC_3DDB, 0x71FD_852E_9D69_DCCB))) ? MinValue : (actual > Decimal128.DecodeBinary(new UInt128(0x3131_4A87_29FC_3DDB, 0x71FD_852E_9D69_DCCB))) ? MaxValue : (Int256)actual,
#endif
decimal actual => (Int512)actual,
byte actual => (Int512)actual,
ushort actual => (Int512)actual,
Expand Down Expand Up @@ -156,7 +166,12 @@ private static bool TryConvertFromTruncating<TOther>(TOther value, out Int512 re
float actual => (float.IsPositiveInfinity(actual)) ? MaxValue : (float.IsNegativeInfinity(actual)) ? MinValue : (Int512)actual,
double actual => (actual <= -TwoPow511) ? MinValue : (actual > +TwoPow511) ? MaxValue : (Int512)actual,
NFloat actual => (actual <= -TwoPow511) ? MinValue : (actual > +TwoPow511) ? MaxValue : (Int512)actual,
Quad actual => (actual <= (new Quad(0xC1FE_0000_0000_0000, 0x0000_0000_0000_0000))) ? MinValue : (actual > (new Quad(0x41FE_0000_0000_0000, 0x0000_0000_0000_0000))) ? MaxValue : (Int512)actual,
#if NET11_0_OR_GREATER
// 2^511 in Binary Encoding
Decimal32 actual => (Decimal32.IsPositiveInfinity(actual)) ? MaxValue : (Decimal32.IsNegativeInfinity(actual)) ? MinValue : (Int256)actual,
Decimal64 actual => (actual <= Decimal64.DecodeBinary(14057934741360918819)) ? MinValue : (actual > Decimal64.DecodeBinary(4834562704506143011)) ? MaxValue : (Int256)actual,
Decimal128 actual => (actual <= Decimal128.DecodeBinary(new UInt128(0xB131_4A87_29FC_3DDB, 0x71FD_852E_9D69_DCCB))) ? MinValue : (actual > Decimal128.DecodeBinary(new UInt128(0x3131_4A87_29FC_3DDB, 0x71FD_852E_9D69_DCCB))) ? MaxValue : (Int256)actual,
#endif
decimal actual => (Int512)actual,
byte actual => (Int512)actual,
ushort actual => (Int512)actual,
Expand Down Expand Up @@ -195,6 +210,11 @@ static bool INumberBase<Int512>.TryConvertToChecked<TOther>(Int512 value, out TO
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
Quad => (TOther)(object)(Quad)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)(byte)value,
ushort => (TOther)(object)(ushort)value,
Expand Down Expand Up @@ -233,6 +253,11 @@ static bool INumberBase<Int512>.TryConvertToSaturating<TOther>(Int512 value, out
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
Quad => (TOther)(object)(Quad)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)((value >= (Int512)byte.MaxValue) ? byte.MaxValue : (value <= (Int512)byte.MinValue) ? byte.MinValue : (byte)value),
ushort => (TOther)(object)((value >= (Int512)ushort.MaxValue) ? ushort.MaxValue : (value <= (Int512)ushort.MinValue) ? ushort.MinValue : (ushort)value),
Expand Down Expand Up @@ -269,6 +294,11 @@ static bool INumberBase<Int512>.TryConvertToTruncating<TOther>(Int512 value, out
double => (TOther)(object)(double)value,
NFloat => (TOther)(object)(NFloat)value,
Quad => (TOther)(object)(Quad)value,
#if NET11_0_OR_GREATER
Decimal32 => (TOther)(object)(Decimal32)value,
Decimal64 => (TOther)(object)(Decimal64)value,
Decimal128 => (TOther)(object)(Decimal128)value,
#endif
decimal => (TOther)(object)(decimal)value,
byte => (TOther)(object)(byte)value,
ushort => (TOther)(object)(ushort)value,
Expand Down Expand Up @@ -658,6 +688,34 @@ public static explicit operator decimal(in Int512 value)
}
return (decimal)(UInt512)(value);
}

#if NET11_0_OR_GREATER
/// <summary>
/// Explicitly converts a <see cref="Int512" /> value to a <see cref="Decimal32"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal32(in Int512 value)
{
return BitHelper.ConvertToDecimalN<Decimal32, Int512>(in value);
}
/// <summary>
/// Explicitly converts a <see cref="Int512" /> value to a <see cref="Decimal64"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal64(in Int512 value)
{
return BitHelper.ConvertToDecimalN<Decimal64, Int512>(in value);
}
/// <summary>
/// Explicitly converts a <see cref="Int512" /> value to a <see cref="Decimal128"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Decimal128(in Int512 value)
{
return BitHelper.ConvertToDecimalN<Decimal128, Int512>(in value);
}
#endif

/// <summary>
/// Explicitly converts a <see cref="Int512" /> value to a <see cref="Octo"/>.
/// </summary>
Expand Down Expand Up @@ -894,6 +952,63 @@ public static explicit operator checked Int512(BigInteger value)
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int512"/>.</exception>
public static explicit operator checked Int512(decimal value) => checked((Int512)(double)value);

#if NET11_0_OR_GREATER
/// <summary>
/// Explicitly converts a <see cref="Decimal32" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int512(Decimal32 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal32>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal32" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int512"/>.</exception>
public static explicit operator checked Int512(Decimal32 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal32>(value, true);
}

/// <summary>
/// Explicitly converts a <see cref="Decimal64" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int512(Decimal64 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal64>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal64" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int512"/>.</exception>
public static explicit operator checked Int512(Decimal64 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal64>(value, true);
}

/// <summary>
/// Explicitly converts a <see cref="Decimal128" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
public static explicit operator Int512(Decimal128 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal128>(value);
}
/// <summary>
/// Explicitly converts a <see cref="Decimal128" /> value to a <see cref="Int512"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <exception cref="OverflowException"><paramref name="value"/> is outside the range of <see cref="Int512"/>.</exception>
public static explicit operator checked Int512(Decimal128 value)
{
return BitHelper.ConvertFromDecimalN<Int512, Decimal128>(value, true);
}
#endif

/// <summary>
/// Explicitly converts a <see cref="double" /> value to a <see cref="Int512"/>.
/// </summary>
Expand Down
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