T61Encoding.cs

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using System.Text;
 
namespace System.Formats.Asn1;
 
internal sealed class T61Encoding : Encoding
{
    private static readonly Encoding s_utf8Encoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true);
 
    private static readonly Encoding s_latin1Encoding = Encoding.GetEncoding("iso-8859-1");
 
    public override int GetByteCount(char[] chars, int index, int count)
    {
        return s_utf8Encoding.GetByteCount(chars, index, count);
    }
 
    public unsafe override int GetByteCount(char* chars, int count)
    {
        return s_utf8Encoding.GetByteCount(chars, count);
    }
 
    public override int GetByteCount(string s)
    {
        return s_utf8Encoding.GetByteCount(s);
    }
 
    public override int GetByteCount(ReadOnlySpan<char> chars)
    {
        return s_utf8Encoding.GetByteCount(chars);
    }
 
    public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex)
    {
        return s_utf8Encoding.GetBytes(chars, charIndex, charCount, bytes, byteIndex);
    }
 
    public unsafe override int GetBytes(char* chars, int charCount, byte* bytes, int byteCount)
    {
        return s_utf8Encoding.GetBytes(chars, charCount, bytes, byteCount);
    }
 
    public override int GetCharCount(byte[] bytes, int index, int count)
    {
        try
        {
            return s_utf8Encoding.GetCharCount(bytes, index, count);
        }
        catch (DecoderFallbackException)
        {
            return s_latin1Encoding.GetCharCount(bytes, index, count);
        }
    }
 
    public unsafe override int GetCharCount(byte* bytes, int count)
    {
        try
        {
            return s_utf8Encoding.GetCharCount(bytes, count);
        }
        catch (DecoderFallbackException)
        {
            return s_latin1Encoding.GetCharCount(bytes, count);
        }
    }
 
    public override int GetCharCount(ReadOnlySpan<byte> bytes)
    {
        try
        {
            return s_utf8Encoding.GetCharCount(bytes);
        }
        catch (DecoderFallbackException)
        {
            return s_latin1Encoding.GetCharCount(bytes);
        }
    }
 
    public override int GetChars(byte[] bytes, int byteIndex, int byteCount, char[] chars, int charIndex)
    {
        try
        {
            return s_utf8Encoding.GetChars(bytes, byteIndex, byteCount, chars, charIndex);
        }
        catch (DecoderFallbackException)
        {
            return s_latin1Encoding.GetChars(bytes, byteIndex, byteCount, chars, charIndex);
        }
    }
 
    public unsafe override int GetChars(byte* bytes, int byteCount, char* chars, int charCount)
    {
        try
        {
            return s_utf8Encoding.GetChars(bytes, byteCount, chars, charCount);
        }
        catch (DecoderFallbackException)
        {
            return s_latin1Encoding.GetChars(bytes, byteCount, chars, charCount);
        }
    }
 
    public override int GetMaxByteCount(int charCount)
    {
        return s_utf8Encoding.GetMaxByteCount(charCount);
    }
 
    public override int GetMaxCharCount(int byteCount)
    {
        return byteCount;
    }
}