private static byte[] GetBytes(Stream stream, int initialLength)
{
if (stream.Position > 0)
{
stream.Position = 0;
}
// If we've been passed an unhelpful initial length, just
// use 32K.
if (initialLength < 1)
{
initialLength = 32768;
}
byte[] buffer = SafeMemoryAllocator.CreateArray <byte>(initialLength);
int read = 0;
int chunk;
while ((chunk = stream.Read(buffer, read, buffer.Length - read)) > 0)
{
read += chunk;
// If we've reached the end of our buffer, check to see if there's
// any more information
if (read == buffer.Length)
{
int nextByte = stream.ReadByte();
// End of stream? If so, we're done
if (nextByte == -1)
{
return(buffer);
}
// Nope. Resize the buffer, put in the byte we've just
// read, and continue
byte[] newBuffer = new byte[buffer.Length * 2];
Buffer.BlockCopy(buffer, 0, newBuffer, 0, Buffer.ByteLength(buffer));
newBuffer[read] = (byte)nextByte;
buffer = newBuffer;
read++;
}
}
// Buffer is now too big. Shrink it.
byte[] ret = SafeMemoryAllocator.CreateArray <byte>(read);
Buffer.BlockCopy(buffer, 0, ret, 0, Buffer.ByteLength(ret));
return(ret);
}
/// <summary>
/// Converts the int array to a byte array.
/// </summary>
/// <param name="integers">The int array to convert.</param>
/// <returns>the byte array representation of the specified int array</returns>
public static byte[] ConvertIntArrayToByteArray(int[] integers)
{
if (integers == null || integers.Length == 0)
{
return(new byte[0]);
}
int sizeInBytes = integers.Length * 4;
byte[] bytes = SafeMemoryAllocator.CreateArray <byte>(sizeInBytes);
Buffer.BlockCopy(integers, 0, bytes, 0, sizeInBytes);
return(bytes);
}
/// <summary>
/// Converts the byte array to an int array.
/// </summary>
/// <param name="bytes">The byte array to convert.</param>
/// <returns>the int array representation of the specified byte array</returns>
/// <remarks>This method expects the specified byte array's length to be divisible by 4 (the number of bytes for a single int)</remarks>
/// <exception cref="ArgumentOutOfRangeException">thrown if the specified byte array is not divisible by 4</exception>
public static int[] ConvertByteArrayToIntArray(byte[] bytes)
{
if (bytes == null || bytes.Length == 0)
{
return(new int[0]);
}
if (bytes.Length % 4 != 0)
{
throw new ArgumentOutOfRangeException("bytes", "This method expects the specified byte array's length to be divisible by 4 (the number of bytes for a single int)");
}
int sizeInIntegers = bytes.Length / 4;
int[] integers = SafeMemoryAllocator.CreateArray <int>(sizeInIntegers);
Buffer.BlockCopy(bytes, 0, integers, 0, bytes.Length);
return(integers);
}
private static byte[] ReadBytes(IPrimitiveReader reader, int count)
{
if (count < 0)
{
throw new InvalidDataException();
}
var result = SafeMemoryAllocator.CreateArray <byte>(count);
int remaining = count;
while (remaining > 0)
{
int read = reader.BaseStream.Read(result, count - remaining, remaining);
if (read <= 0)
{
throw new InvalidDataException("Unexpected end of stream");
}
remaining -= read;
}
return(result);
}
public static BitArray ReadBitArray(this IPrimitiveReader reader)
{
var count = reader.ReadVarInt32();
if (count == -1)
{
return(null);
}
if (count < 0)
{
reader.RaiseInvalidDataException();
}
var buffer = SafeMemoryAllocator.CreateArray <byte>(RoundToNearest8(count));
reader.BaseStream.Read(buffer, 0, buffer.Length);
var result = new BitArray(buffer)
{
Length = count
};
return(result);
}
