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BitReader.String.Extensions.cs
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76 lines (59 loc) · 1.81 KB
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using System.Buffers;
namespace NetCode;
public static class BitReaderStringExtensions
{
public static string ReadString(this BitReader reader) => ReadUtf8String(reader);
public static string ReadString(this BitReader reader, string baseline)
{
var isChanged = reader.ReadBool();
if (isChanged)
{
return reader.ReadString();
}
return baseline;
}
public static string ReadUtf8String(this BitReader reader)
{
var length = reader.ReadCompressedInt();
#if NETSTANDARD2_0
var chars = ArrayPool<char>.Shared.Rent(length);
for (int i = 0; i < length; i++)
{
chars[i] = (char)reader.ReadByte();
}
var s = new string(chars, 0, length);
ArrayPool<char>.Shared.Return(chars);
#else
var s = string.Create(length, reader, (span, bitReader) =>
{
for (int i = 0; i < span.Length; i++)
{
span[i] = (char)bitReader.ReadByte();
}
});
#endif
return string.Intern(s);
}
public static string ReadUnicodeString(this BitReader reader)
{
var length = reader.ReadCompressedInt();
#if NETSTANDARD2_0
var chars = ArrayPool<char>.Shared.Rent(length);
for (int i = 0; i < length; i++)
{
chars[i] = (char)reader.ReadUShort();
}
var s = new string(chars, 0, length);
ArrayPool<char>.Shared.Return(chars);
#else
var s = string.Create(length, reader, (span, bitReader) =>
{
for (int i = 0; i < span.Length; i++)
{
span[i] = (char)bitReader.ReadUShort();
}
});
#endif
return string.Intern(s);
}
}