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com.alicizax.unity.cysharp..../FastNumberWriter.cs

300 lines
13 KiB
C#
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init
2025-01-09 13:57:51 +08:00
using System;
using System.Collections.Generic;
using System.Text;
namespace Cysharp.Text
{
internal static class FastNumberWriter
{
// Faster than .NET Core .TryFormat without format string.
public static bool TryWriteInt64(Span<char> buffer, out int charsWritten, long value)
{
var offset = 0;
charsWritten = 0;
long num1 = value, num2, num3, num4, num5, div;
if (value < 0)
{
if (value == long.MinValue) // -9223372036854775808
{
if (buffer.Length < 20) { return false; }
buffer[offset++] = (char)'-';
buffer[offset++] = (char)'9';
buffer[offset++] = (char)'2';
buffer[offset++] = (char)'2';
buffer[offset++] = (char)'3';
buffer[offset++] = (char)'3';
buffer[offset++] = (char)'7';
buffer[offset++] = (char)'2';
buffer[offset++] = (char)'0';
buffer[offset++] = (char)'3';
buffer[offset++] = (char)'6';
buffer[offset++] = (char)'8';
buffer[offset++] = (char)'5';
buffer[offset++] = (char)'4';
buffer[offset++] = (char)'7';
buffer[offset++] = (char)'7';
buffer[offset++] = (char)'5';
buffer[offset++] = (char)'8';
buffer[offset++] = (char)'0';
buffer[offset++] = (char)'8';
charsWritten = offset;
return true;
}
if (buffer.Length < 1) { return false; }
buffer[offset++] = (char)'-';
num1 = unchecked(-value);
}
// WriteUInt64(inlined)
if (num1 < 10000)
{
if (num1 < 10) { if (buffer.Length < 1) { return false; } goto L1; }
if (num1 < 100) { if (buffer.Length < 2) { return false; } goto L2; }
if (num1 < 1000) { if (buffer.Length < 3) { return false; } goto L3; }
if (buffer.Length < 4) { return false; }
goto L4;
}
else
{
num2 = num1 / 10000;
num1 -= num2 * 10000;
if (num2 < 10000)
{
if (num2 < 10) { if (buffer.Length < 5) { return false; } goto L5; }
if (num2 < 100) { if (buffer.Length < 6) { return false; } goto L6; }
if (num2 < 1000) { if (buffer.Length < 7) { return false; } goto L7; }
if (buffer.Length < 8) { return false; }
goto L8;
}
else
{
num3 = num2 / 10000;
num2 -= num3 * 10000;
if (num3 < 10000)
{
if (num3 < 10) { if (buffer.Length < 9) { return false; } goto L9; }
if (num3 < 100) { if (buffer.Length < 10) { return false; } goto L10; }
if (num3 < 1000) { if (buffer.Length < 11) { return false; } goto L11; }
if (buffer.Length < 12) { return false; }
goto L12;
}
else
{
num4 = num3 / 10000;
num3 -= num4 * 10000;
if (num4 < 10000)
{
if (num4 < 10) { if (buffer.Length < 13) { return false; } goto L13; }
if (num4 < 100) { if (buffer.Length < 14) { return false; } goto L14; }
if (num4 < 1000) { if (buffer.Length < 15) { return false; } goto L15; }
if (buffer.Length < 16) { return false; }
goto L16;
}
else
{
num5 = num4 / 10000;
num4 -= num5 * 10000;
if (num5 < 10000)
{
if (num5 < 10) { if (buffer.Length < 17) { return false; } goto L17; }
if (num5 < 100) { if (buffer.Length < 18) { return false; } goto L18; }
if (num5 < 1000) { if (buffer.Length < 19) { return false; } goto L19; }
if (buffer.Length < 20) { return false; }
goto L20;
}
L20:
buffer[offset++] = (char)('0' + (div = (num5 * 8389L) >> 23));
num5 -= div * 1000;
L19:
buffer[offset++] = (char)('0' + (div = (num5 * 5243L) >> 19));
num5 -= div * 100;
L18:
buffer[offset++] = (char)('0' + (div = (num5 * 6554L) >> 16));
num5 -= div * 10;
L17:
buffer[offset++] = (char)('0' + (num5));
}
L16:
buffer[offset++] = (char)('0' + (div = (num4 * 8389L) >> 23));
num4 -= div * 1000;
L15:
buffer[offset++] = (char)('0' + (div = (num4 * 5243L) >> 19));
num4 -= div * 100;
L14:
buffer[offset++] = (char)('0' + (div = (num4 * 6554L) >> 16));
num4 -= div * 10;
L13:
buffer[offset++] = (char)('0' + (num4));
}
L12:
buffer[offset++] = (char)('0' + (div = (num3 * 8389L) >> 23));
num3 -= div * 1000;
L11:
buffer[offset++] = (char)('0' + (div = (num3 * 5243L) >> 19));
num3 -= div * 100;
L10:
buffer[offset++] = (char)('0' + (div = (num3 * 6554L) >> 16));
num3 -= div * 10;
L9:
buffer[offset++] = (char)('0' + (num3));
}
L8:
buffer[offset++] = (char)('0' + (div = (num2 * 8389L) >> 23));
num2 -= div * 1000;
L7:
buffer[offset++] = (char)('0' + (div = (num2 * 5243L) >> 19));
num2 -= div * 100;
L6:
buffer[offset++] = (char)('0' + (div = (num2 * 6554L) >> 16));
num2 -= div * 10;
L5:
buffer[offset++] = (char)('0' + (num2));
}
L4:
buffer[offset++] = (char)('0' + (div = (num1 * 8389L) >> 23));
num1 -= div * 1000;
L3:
buffer[offset++] = (char)('0' + (div = (num1 * 5243L) >> 19));
num1 -= div * 100;
L2:
buffer[offset++] = (char)('0' + (div = (num1 * 6554L) >> 16));
num1 -= div * 10;
L1:
buffer[offset++] = (char)('0' + (num1));
charsWritten = offset;
return true;
}
public static bool TryWriteUInt64(Span<char> buffer, out int charsWritten, ulong value)
{
ulong num1 = value, num2, num3, num4, num5, div;
charsWritten = 0;
var offset = 0;
if (num1 < 10000)
{
if (num1 < 10) { if (buffer.Length < 1) { return false; } goto L1; }
if (num1 < 100) { if (buffer.Length < 2) { return false; } goto L2; }
if (num1 < 1000) { if (buffer.Length < 3) { return false; } goto L3; }
if (buffer.Length < 4) { return false; }
goto L4;
}
else
{
num2 = num1 / 10000;
num1 -= num2 * 10000;
if (num2 < 10000)
{
if (num2 < 10) { if (buffer.Length < 5) { return false; } goto L5; }
if (num2 < 100) { if (buffer.Length < 6) { return false; } goto L6; }
if (num2 < 1000) { if (buffer.Length < 7) { return false; } goto L7; }
if (buffer.Length < 8) { return false; }
goto L8;
}
else
{
num3 = num2 / 10000;
num2 -= num3 * 10000;
if (num3 < 10000)
{
if (num3 < 10) { if (buffer.Length < 9) { return false; } goto L9; }
if (num3 < 100) { if (buffer.Length < 10) { return false; } goto L10; }
if (num3 < 1000) { if (buffer.Length < 11) { return false; } goto L11; }
if (buffer.Length < 12) { return false; }
goto L12;
}
else
{
num4 = num3 / 10000;
num3 -= num4 * 10000;
if (num4 < 10000)
{
if (num4 < 10) { if (buffer.Length < 13) { return false; } goto L13; }
if (num4 < 100) { if (buffer.Length < 14) { return false; } goto L14; }
if (num4 < 1000) { if (buffer.Length < 15) { return false; } goto L15; }
if (buffer.Length < 16) { return false; }
goto L16;
}
else
{
num5 = num4 / 10000;
num4 -= num5 * 10000;
if (num5 < 10000)
{
if (num5 < 10) { if (buffer.Length < 17) { return false; } goto L17; }
if (num5 < 100) { if (buffer.Length < 18) { return false; } goto L18; }
if (num5 < 1000) { if (buffer.Length < 19) { return false; } goto L19; }
if (buffer.Length < 20) { return false; }
goto L20;
}
L20:
buffer[offset++] = (char)('0' + (div = (num5 * 8389UL) >> 23));
num5 -= div * 1000;
L19:
buffer[offset++] = (char)('0' + (div = (num5 * 5243UL) >> 19));
num5 -= div * 100;
L18:
buffer[offset++] = (char)('0' + (div = (num5 * 6554UL) >> 16));
num5 -= div * 10;
L17:
buffer[offset++] = (char)('0' + (num5));
}
L16:
buffer[offset++] = (char)('0' + (div = (num4 * 8389UL) >> 23));
num4 -= div * 1000;
L15:
buffer[offset++] = (char)('0' + (div = (num4 * 5243UL) >> 19));
num4 -= div * 100;
L14:
buffer[offset++] = (char)('0' + (div = (num4 * 6554UL) >> 16));
num4 -= div * 10;
L13:
buffer[offset++] = (char)('0' + (num4));
}
L12:
buffer[offset++] = (char)('0' + (div = (num3 * 8389UL) >> 23));
num3 -= div * 1000;
L11:
buffer[offset++] = (char)('0' + (div = (num3 * 5243UL) >> 19));
num3 -= div * 100;
L10:
buffer[offset++] = (char)('0' + (div = (num3 * 6554UL) >> 16));
num3 -= div * 10;
L9:
buffer[offset++] = (char)('0' + (num3));
}
L8:
buffer[offset++] = (char)('0' + (div = (num2 * 8389UL) >> 23));
num2 -= div * 1000;
L7:
buffer[offset++] = (char)('0' + (div = (num2 * 5243UL) >> 19));
num2 -= div * 100;
L6:
buffer[offset++] = (char)('0' + (div = (num2 * 6554UL) >> 16));
num2 -= div * 10;
L5:
buffer[offset++] = (char)('0' + (num2));
}
L4:
buffer[offset++] = (char)('0' + (div = (num1 * 8389UL) >> 23));
num1 -= div * 1000;
L3:
buffer[offset++] = (char)('0' + (div = (num1 * 5243UL) >> 19));
num1 -= div * 100;
L2:
buffer[offset++] = (char)('0' + (div = (num1 * 6554UL) >> 16));
num1 -= div * 10;
L1:
buffer[offset++] = (char)('0' + (num1));
charsWritten = offset;
return true;
}
}
}
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