// Token: 0x0600159F RID: 5535 RVA: 0x0008016C File Offset: 0x0007E36C
internal static int CopyStream(Stream source, Stream target, int offset, int count, bool needCrc, out uint crc)
{
byte[] array = null;
int num = 0;
crc = 0U;
if (count == 0)
{
return(0);
}
if (count < 0)
{
count = int.MaxValue;
}
try
{
array = StreamHelper.bytesBufferPool.Acquire();
if (array == null)
{
throw new InvalidOperationException("buffer should never be null.");
}
int num2;
if (source.CanSeek)
{
source.Seek((long)offset, SeekOrigin.Begin);
}
else if (offset > 0)
{
do
{
num2 = source.Read(array, 0, (offset < array.Length) ? offset : array.Length);
offset -= num2;
}while (num2 > 0 && offset > 0);
}
do
{
num2 = source.Read(array, 0, (count < array.Length) ? count : array.Length);
if (num2 != 0)
{
target.Write(array, 0, num2);
if (needCrc)
{
crc = StreamHelper.UpdateCrc32(crc, array, 0, num2);
}
AirSyncDiagnostics.TraceBinaryData(ExTraceGlobals.RawBodyBytesTracer, null, array, num2);
count -= num2;
num += num2;
}
}while (num2 > 0 && count > 0);
}
finally
{
if (array != null)
{
StreamHelper.bytesBufferPool.Release(array);
}
}
return(num);
}
// Token: 0x060002B7 RID: 695 RVA: 0x0000F384 File Offset: 0x0000D584
private int GetStreamHash()
{
int num = 0;
uint num2 = 0U;
long position = this.internalStream.Position;
this.internalStream.Position = 0L;
bool flag = false;
byte[] array;
if (AirSyncStream.streamBufferPool != null)
{
array = AirSyncStream.streamBufferPool.Acquire();
flag = true;
goto IL_46;
}
array = new byte[8192];
try
{
do
{
IL_46:
int num3 = this.internalStream.Read(array, 0, array.Length);
if (num3 == 0)
{
break;
}
num2 = StreamHelper.UpdateCrc32(num2, array, 0, num3);
num += num3;
}while ((long)num < this.Length);
this.internalStream.Position = position;
}
finally
{
if (flag && array != null)
{
AirSyncStream.streamBufferPool.Release(array);
}
}
return((int)num2);
}
// Token: 0x0600159A RID: 5530 RVA: 0x0007FF68 File Offset: 0x0007E168
internal static int CopyStream(Stream source, Stream target, Encoding encoding, int charCount, bool needCrc, out uint crc)
{
crc = 0U;
byte[] array = null;
StreamHelper.CharArrayBuffer charArrayBuffer = null;
int num = 0;
if (charCount == 0)
{
return(0);
}
if (charCount < 0)
{
charCount = int.MaxValue;
}
int result;
try
{
array = StreamHelper.bytesBufferPool.Acquire();
charArrayBuffer = StreamHelper.charsBufferPool.Acquire();
if (array == null)
{
throw new InvalidOperationException("bytesBuffer should never be null.");
}
if (charArrayBuffer == null)
{
throw new InvalidOperationException("charsBuffer should never be null.");
}
StreamReader streamReader = new StreamReader(source, encoding);
do
{
int num2 = (6144 > charCount - num - 1) ? (charCount - num - 1) : 6144;
if (num2 == 0)
{
num2 = 1;
}
int num3 = streamReader.ReadBlock(charArrayBuffer.Buffer, 0, num2);
if (num3 == 0)
{
break;
}
if (StreamHelper.NeedToHandleSurrogate(charArrayBuffer.Buffer, num2, num3))
{
int num4 = streamReader.Read();
if (num4 != -1)
{
charArrayBuffer.Buffer[num3] = (char)num4;
char c = charArrayBuffer.Buffer[num3];
char c2 = charArrayBuffer.Buffer[num3 - 1];
if (!char.IsSurrogatePair(c2, c))
{
string message = string.Format(CultureInfo.InvariantCulture, "Invalid surrogate chars: first={0}, second={1}", new object[]
{
c2,
c
});
AirSyncDiagnostics.TraceDebug(ExTraceGlobals.RequestsTracer, null, message);
}
num3++;
}
}
num += num3;
int bytes = encoding.GetBytes(charArrayBuffer.Buffer, 0, num3, array, 0);
target.Write(array, 0, bytes);
if (needCrc)
{
crc = StreamHelper.UpdateCrc32(crc, array, 0, bytes);
}
}while (num < charCount);
result = num;
}
finally
{
if (array != null)
{
StreamHelper.bytesBufferPool.Release(array);
}
if (charArrayBuffer != null)
{
charArrayBuffer.Clear();
StreamHelper.charsBufferPool.Release(charArrayBuffer);
}
}
return(result);
}
