README.md

RyuCsharp

使用 C# 实现的 Ryu ，一个高性能浮点数转换为字符串的算法。

Ryu, implemented by C#, a high-performance algorithm for converting floats to strings.

2023-09-21 RyuCsharp update descriptions:

• To avoid managed memory fragmentation, the implementation was changed from pointers to references. (The difference between pointer and reference is that the former is an unmanaged pointer and the latter is a managed pointer.)
• Inherit the open source license of the parent project to make it easier for everyone to use.
• fix bugs.
• Publish nuget package.

Usage example:

{
    // Array
    char[] charArray = new char[32]; // Need to ensure that the memory size is sufficient.
    var writtenLength = Ryu.d2s_buffered_n(3.1415926D, ref charArray[0]);
    Console.WriteLine(new string(charArray, 0, writtenLength)); // Output: 3.1415926E0
}

{
    // Span
    Span<char> charSpan = (new char[32]).AsSpan();
    var writtenLength = Ryu.d2s_buffered_n(3.1415926D, ref charSpan[0]);
    Console.WriteLine(charSpan.Slice(0, writtenLength).ToString()); // Output: 3.1415926E0
}

{
    // Pointer
    char* pChars = stackalloc char[32];
    Ryu.d2s_buffered(3.1415926D, ref *pChars);
    Console.WriteLine(new string(pChars)); // Output: 3.1415926E0
}