Added overload with char* buffer

Author: linkdotnet

CHANGELOG.md

@@ -6,6 +6,9 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 
 ## [Unreleased]
 
+### Added
+- `Append(char* value, int length)` overload.
+
 ## [1.9.0] - 2022-11-18
 
 ### Added

src/LinkDotNet.StringBuilder/ValueStringBuilder.Append.cs

@@ -39,6 +39,16 @@ public void Append(scoped ReadOnlySpan<char> str)
         bufferPosition += str.Length;
     }
 
+    /// <summary>
+    /// Appends a character buffer to this builder.
+    /// </summary>
+    /// <param name="value">The pointer to the start of the buffer.</param>
+    /// <param name="length">The number of characters in the buffer.</param>
+    public unsafe void Append(char* value, int length)
+    {
+        Append(new ReadOnlySpan<char>(value, length));
+    }
+
     /// <summary>
     /// Adds the default new line separator.
     /// </summary>

tests/LinkDotNet.StringBuilder.UnitTests/ValueStringBuilder.Append.Tests.cs

@@ -141,4 +141,18 @@ public void ShouldAppendBoolean(bool value, string expected)
 
         builder.ToString().Should().Be(expected);
     }
+
+    [Fact]
+    public unsafe void ShouldAddCharPointer()
+    {
+        using var builder = new ValueStringBuilder();
+        const string text = "Hello World";
+
+        fixed (char* pText = text)
+        {
+            builder.Append(pText, 5);
+        }
+
+        builder.ToString().Should().Be("Hello");
+    }
 }