/// <inheritdoc/>
public override byte[] GetBytes(ReadOnlySpan <char> chars)
{
// GetBytes converts in two passes so that it can perform a single allocation
// for the final array of bytes...
int bytesRequired = GetByteCount(chars);
if (bytesRequired == 0)
{
return(Array.Empty <byte>());
}
var outputBytes = new byte[bytesRequired];
var decoder = new QpDecoder(Settings);
var convertStatus = decoder.ConvertData(chars, 0, chars.Length,
outputBytes.AsSpan(), 0, outputBytes.Length,
true,
out var inputUsed,
out var outputUsed);
System.Diagnostics.Debug.Assert(convertStatus);
System.Diagnostics.Debug.Assert(inputUsed == chars.Length);
System.Diagnostics.Debug.Assert(outputUsed == outputBytes.Length);
return(outputBytes);
}
/// <inheritdoc/>
public override int GetByteCount(ReadOnlySpan <char> chars)
{
var decoder = new QpDecoder(Settings);
Span <byte> outputBuffer = stackalloc byte[1024];
int inputOffset = 0;
int inputCount = chars.Length;
int outputLength = 0;
ConvertStatus convertStatus;
do
{
convertStatus = decoder.ConvertData(chars, inputOffset, inputCount,
outputBuffer, 0, outputBuffer.Length,
true,
out var inputUsed,
out var outputUsed);
outputLength += outputUsed;
inputOffset += inputUsed;
inputCount -= inputUsed;
} while (!convertStatus);
return(outputLength);
}
protected override ConvertStatus ConvertData(ReadOnlySpan <char> inputData, int inputIndex, int inputCount, Span <byte> outputData, int outputIndex, int outputCount, bool flush, out int inputUsed, out int outputUsed)
{
return(_codecDecoder.ConvertData(inputData, inputIndex, inputCount,
outputData, outputIndex, outputCount,
flush,
out inputUsed,
out outputUsed));
}