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‎Hexa.NET.Utilities.Tests/Utf8FormatterTests.cs‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,100 @@
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using System.Globalization;
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using System.Text;
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using Hexa.NET.Utilities.Text;
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namespace Hexa.NET.Utilities.Tests;
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public class Utf8FormatterTests
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{
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[TestCase(1f, 0, "1")]
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[TestCase(10f, 0, "10")]
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[TestCase(0.5f, 1, "0.5")]
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[TestCase(0.75f, 2, "0.75")]
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[TestCase(0.125f, 3, "0.125")]
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[TestCase(0.0625f, 4, "0.0625")]
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[TestCase(0.03125f, 5, "0.03125")]
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[TestCase(0.015625f, 6, "0.015625")]
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[TestCase(0.0078125f, 7, "0.0078125")]
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public unsafe void FormatFloatTest(float value, int digit, string expected)
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{
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// Arrange
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byte* buffer = stackalloc byte[128];
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// Act
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int len = Utf8Formatter.Format(value, buffer, 128, CultureInfo.InvariantCulture, digit);
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ReadOnlySpan<byte> utf8Span = new ReadOnlySpan<byte>(buffer, len);
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// Assert
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Assert.That(Encoding.UTF8.GetString(utf8Span), Is.EqualTo(expected));
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}
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[TestCase(1, 0, "1")]
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[TestCase(10, 0, "10")]
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[TestCase(0.5, 1, "0.5")]
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[TestCase(0.75, 2, "0.75")]
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[TestCase(0.125, 3, "0.125")]
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[TestCase(0.0625, 4, "0.0625")]
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[TestCase(0.03125, 5, "0.03125")]
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[TestCase(0.015625, 6, "0.015625")]
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[TestCase(0.0078125, 7, "0.0078125")]
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public unsafe void FormatDoubleTest(double value, int digit, string expected)
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{
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// Arrange
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byte* buffer = stackalloc byte[128];
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// Act
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int len = Utf8Formatter.Format(value, buffer, 128, CultureInfo.InvariantCulture, digit);
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ReadOnlySpan<byte> utf8Span = new ReadOnlySpan<byte>(buffer, len);
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// Assert
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Assert.That(Encoding.UTF8.GetString(utf8Span), Is.EqualTo(expected));
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}
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[TestCase(10, 0, ".","10")]
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[TestCase(10, 0, "\uFF0C","10")]
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[TestCase(0.75f, 2, ".","0.75")]
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[TestCase(0.75f, 2, "\uFF0C","0\uFF0C75")]
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public unsafe void FormatFloatCultureTest(float value, int digit, string separator, string expected)
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{
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// Arrange
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byte* buffer = stackalloc byte[128];
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var culture = new CultureInfo( "", false )
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{
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NumberFormat =
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{
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CurrencyDecimalSeparator = separator
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}
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};
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// Act
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int len = Utf8Formatter.Format(value, buffer, 128, culture, digit);
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ReadOnlySpan<byte> utf8Span = new ReadOnlySpan<byte>(buffer, len);
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// Assert
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Assert.That(Encoding.UTF8.GetString(utf8Span), Is.EqualTo(expected));
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}
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[TestCase(10, 0, ".","10")]
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[TestCase(10, 0, "\uFF0C","10")]
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[TestCase(0.75, 2, ".","0.75")]
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[TestCase(0.75, 2, "\uFF0C","0\uFF0C75")]
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public unsafe void FormatDoubleCultureTest(double value, int digit, string separator, string expected)
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{
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// Arrange
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byte* buffer = stackalloc byte[128];
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var culture = new CultureInfo( "", false )
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{
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NumberFormat =
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{
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CurrencyDecimalSeparator = separator
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}
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};
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// Act
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int len = Utf8Formatter.Format(value, buffer, 128, culture, digit);
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var utf8Span = new ReadOnlySpan<byte>(buffer, len);
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// Assert
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Assert.That(Encoding.UTF8.GetString(utf8Span), Is.EqualTo(expected));
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}
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}

‎Hexa.NET.Utilities/Text/Utf8Formatter.cs‎

Lines changed: 20 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -47,7 +47,9 @@ public static unsafe bool Is<T>(this TypedReference reference, [MaybeNullWhen(fa
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#endif
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/// <summary>
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/// Will be moved to Hexa.NET.Utilities later.
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/// Provides high-performance formatting utilities for UTF-8 encoded strings using raw pointers.
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/// Designed for scenarios where direct memory manipulation is needed for speed or low-level control.
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/// This class operates exclusively on raw pointers and does not perform any managed string allocations.
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/// </summary>
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public static class Utf8Formatter
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{
@@ -327,7 +329,9 @@ public static unsafe int Format(float value, byte* buffer, int bufSize, CultureI
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return (int)(buffer - start);
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}
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byte* beforeSeparator = buffer;
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buffer += ConvertUtf16ToUtf8(format.CurrencyDecimalSeparator, buffer, (int)(end - buffer));
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byte* afterSeparator = buffer;
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digits = digits >= 0 ? digits : 7;
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@@ -341,11 +345,16 @@ public static unsafe int Format(float value, byte* buffer, int bufSize, CultureI
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if (fraction < 1e-14) break;
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}
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while (*(buffer - 1) == '0' || *(buffer - 1) == '.')
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while (buffer != afterSeparator && *(buffer - 1) == '0')
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{
346350
buffer--;
347351
}
348352

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if (buffer == afterSeparator)
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{
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buffer = beforeSeparator;
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}
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349358
end:
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*buffer = 0;
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return (int)(buffer - start);
@@ -405,7 +414,9 @@ public static unsafe int Format(double value, byte* buffer, int bufSize, Culture
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return (int)(buffer - start);
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}
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byte* beforeSeparator = buffer;
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buffer += ConvertUtf16ToUtf8(format.CurrencyDecimalSeparator, buffer, (int)(end - buffer));
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byte* afterSeparator = buffer;
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digits = digits >= 0 ? digits : 7;
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@@ -419,11 +430,16 @@ public static unsafe int Format(double value, byte* buffer, int bufSize, Culture
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if (fraction < 1e-14) break;
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}
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while (*(buffer - 1) == '0' || *(buffer - 1) == '.')
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while (buffer != afterSeparator && *(buffer - 1) == '0')
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{
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buffer--;
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}
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438+
if (buffer == afterSeparator)
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{
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buffer = beforeSeparator;
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}
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end:
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*buffer = 0;
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return (int)(buffer - start);
@@ -1860,4 +1876,4 @@ private static unsafe int CountAhead(char** format, char* formatEnd, char target
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return count;
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}
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}
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}
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}

‎README.md‎

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@@ -88,4 +88,4 @@ Contributions are welcome! If you have ideas for new features or improvements, f
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## License
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This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for more details.
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This project is licensed under the MIT License. See the [LICENSE](LICENSE.txt) file for more details.

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