NightOwl888 commented on code in PR #1170:
URL: https://github.com/apache/lucenenet/pull/1170#discussion_r2308867982
##########
src/Lucene.Net/Support/IO/StreamExtensions.cs:
##########
@@ -210,5 +213,154 @@ public static long ReadInt64(this Stream stream)
buff[6] << 16 | buff[7] << 24);
return (long)((ulong)hi) << 32 | lo;
}
+
+ //async versions of the above methods
+ public static async Task WriteInt32Async(this Stream output, int
value, CancellationToken cancellationToken = default)
+ {
+ if (output is null)
+ throw new ArgumentNullException(nameof(output));
+
+ byte[] buff = new byte[4];
+ buff[0] = (byte)(value >> 24);
+ buff[1] = (byte)(value >> 16);
+ buff[2] = (byte)(value >> 8);
+ buff[3] = (byte)value;
+
+ await output.WriteAsync(buff, 0, buff.Length,
cancellationToken).ConfigureAwait(false);
+ }
+
+ public static async Task WriteInt64Async(this Stream output, long
value, CancellationToken cancellationToken = default)
+ {
+ if (output is null)
+ throw new ArgumentNullException(nameof(output));
+
+ byte[] buff = new byte[8];
+ buff[0] = (byte)(value >> 56);
+ buff[1] = (byte)(value >> 48);
+ buff[2] = (byte)(value >> 40);
+ buff[3] = (byte)(value >> 32);
+ buff[4] = (byte)(value >> 24);
+ buff[5] = (byte)(value >> 16);
+ buff[6] = (byte)(value >> 8);
+ buff[7] = (byte)value;
+
+ await output.WriteAsync(buff, 0, buff.Length,
cancellationToken).ConfigureAwait(false);
+ }
+
+ public static async Task WriteUTFAsync(this Stream output, string
value, CancellationToken cancellationToken = default)
+ {
+ if (output is null)
+ throw new ArgumentNullException(nameof(output));
+ if (value is null)
+ throw new ArgumentNullException(nameof(value));
+
+ long utfCount = CountUTFBytes(value);
+ if (utfCount > ushort.MaxValue)
+ throw new EncoderFallbackException("Encoded string too long.");
+
+ byte[] buffer = new byte[(int)utfCount + 2];
+ int offset = 0;
+ offset = WriteInt16ToBuffer((int)utfCount, buffer, offset);
+ offset = WriteUTFBytesToBuffer(value, (int)utfCount, buffer,
offset);
+
+ await output.WriteAsync(buffer, 0, offset,
cancellationToken).ConfigureAwait(false);
+ }
+
+ public static async Task<int> ReadInt32Async(this Stream input,
CancellationToken cancellationToken = default)
+ {
+ if (input is null)
+ throw new ArgumentNullException(nameof(input));
+
+ byte[] buff = new byte[4];
+ int read = await input.ReadAsync(buff, 0, buff.Length,
cancellationToken).ConfigureAwait(false);
+ if (read < buff.Length) throw new EndOfStreamException();
+
+ return (buff[0] << 24) | (buff[1] << 16) | (buff[2] << 8) |
buff[3];
+ }
+
+ public static async Task<long> ReadInt64Async(this Stream input,
CancellationToken cancellationToken = default)
+ {
+ if (input is null)
+ throw new ArgumentNullException(nameof(input));
+
+ byte[] buff = new byte[8];
+ int read = await input.ReadAsync(buff, 0, buff.Length,
cancellationToken).ConfigureAwait(false);
+ if (read < buff.Length) throw new EndOfStreamException();
+
+ return ((long)buff[0] << 56) |
+ ((long)buff[1] << 48) |
+ ((long)buff[2] << 40) |
+ ((long)buff[3] << 32) |
+ ((long)buff[4] << 24) |
+ ((long)buff[5] << 16) |
+ ((long)buff[6] << 8) |
+ buff[7];
+ }
+
+ public static async Task<string> ReadUTFAsync(this Stream input,
CancellationToken cancellationToken = default)
+ {
+ if (input is null)
+ throw new ArgumentNullException(nameof(input));
+
+ byte[] lenBuff = new byte[2];
+ int readLen = await input.ReadAsync(lenBuff, 0, lenBuff.Length,
cancellationToken).ConfigureAwait(false);
+ if (readLen < lenBuff.Length) throw new EndOfStreamException();
Review Comment:
Ahh, you are correct. It should cover the `== 0` case. For some reason when
I first looked at it I thought the condition was the other way around. So, this
is fine the way it is.
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