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using System.Threading.Tasks;
namespace System.Xml {
internal static partial class BinHexEncoder {
internal static async Task EncodeAsync( byte[] buffer, int index, int count, XmlWriter writer ) {
if ( buffer == null ) {
throw new ArgumentNullException( "buffer" );
}
if ( index < 0 ) {
throw new ArgumentOutOfRangeException( "index" );
}
if ( count < 0 ) {
throw new ArgumentOutOfRangeException( "count" );
}
if ( count > buffer.Length - index ) {
throw new ArgumentOutOfRangeException( "count" );
}
char[] chars = new char[ ( count * 2 ) < CharsChunkSize ? ( count * 2 ) : CharsChunkSize ];
int endIndex = index + count;
while ( index < endIndex ) {
int cnt = ( count < CharsChunkSize/2 ) ? count : CharsChunkSize/2;
int charCount = Encode( buffer, index, cnt, chars );
await writer.WriteRawAsync( chars, 0, charCount ).ConfigureAwait(false);
index += cnt;
count -= cnt;
}
}
} // class
} // namespace
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