/// <summary>
/// Writes a list value to a buffer.
/// </summary>
/// <param name="buffer">The buffer to write.</param>
/// <param name="value">The list value.</param>
/// <param name="smallEncoding">if true, try using small encoding if possible.</param>
public static void WriteList(ByteBuffer buffer, IList value, bool smallEncoding)
{
if (value == null)
{
AmqpBitConverter.WriteUByte(buffer, FormatCode.Null);
}
else
{
// trim tailing nulls
int last = value.Count - 1;
while (last >= 0 && value[last] == null)
{
--last;
}
if (last < 0 && smallEncoding)
{
AmqpBitConverter.WriteUByte(buffer, FormatCode.List0);
}
else
{
int pos = buffer.WritePos;
AmqpBitConverter.WriteUByte(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
for (int i = 0; i <= last; ++i)
{
Encoder.WriteObject(buffer, value[i], smallEncoding);
}
int size = buffer.WritePos - pos - 9;
int count = last + 1;
if (smallEncoding && size < byte.MaxValue && count <= byte.MaxValue)
{
buffer.Buffer[pos] = FormatCode.List8;
buffer.Buffer[pos + 1] = (byte)(size + 1);
buffer.Buffer[pos + 2] = (byte)count;
Array.Copy(buffer.Buffer, pos + 9, buffer.Buffer, pos + 3, size);
buffer.Shrink(6);
}
else
{
buffer.Buffer[pos] = FormatCode.List32;
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 1, size + 4);
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 5, count);
}
}
}
}
/// <summary>
/// Writes a map value to a buffer.
/// </summary>
/// <param name="buffer">The buffer to write.</param>
/// <param name="value">The map value.</param>
/// <param name="smallEncoding">if true, try using small encoding if possible.</param>
public static void WriteMap(ByteBuffer buffer, Map value, bool smallEncoding)
{
if (value == null)
{
AmqpBitConverter.WriteUByte(buffer, FormatCode.Null);
}
else
{
int pos = buffer.WritePos;
AmqpBitConverter.WriteUByte(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
foreach (var key in value.Keys)
{
Encoder.WriteObject(buffer, key);
Encoder.WriteObject(buffer, value[key]);
}
int size = buffer.WritePos - pos - 9;
int count = value.Count * 2;
if (smallEncoding && size < byte.MaxValue && count <= byte.MaxValue)
{
buffer.Buffer[pos] = FormatCode.Map8;
buffer.Buffer[pos + 1] = (byte)(size + 1);
buffer.Buffer[pos + 2] = (byte)count;
Array.Copy(buffer.Buffer, pos + 9, buffer.Buffer, pos + 3, size);
buffer.Shrink(6);
}
else
{
buffer.Buffer[pos] = FormatCode.Map32;
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 1, size + 4);
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 5, count);
}
}
}
/// <summary>
/// Writes an array value to a buffer.
/// </summary>
/// <param name="buffer">The buffer to write.</param>
/// <param name="value">The array value.</param>
public static void WriteArray(ByteBuffer buffer, Array value)
{
if (value == null)
{
AmqpBitConverter.WriteUByte(buffer, FormatCode.Null);
}
else
{
int count = value.Length;
Fx.Assert(count > 0, "must have at least 1 element in array");
int pos = buffer.WritePos;
AmqpBitConverter.WriteUByte(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
AmqpBitConverter.WriteUInt(buffer, 0);
for (int i = 0; i < count; ++i)
{
object item = value.GetValue(i);
if (i == 0)
{
Encoder.WriteObject(buffer, item, false);
}
else
{
int lastPos = buffer.WritePos - 1;
byte lastByte = buffer.Buffer[lastPos];
buffer.Shrink(1);
Encoder.WriteObject(buffer, item, false);
buffer.Buffer[lastPos] = lastByte;
}
}
int size = buffer.WritePos - pos - 9;
if (size < byte.MaxValue && count <= byte.MaxValue)
{
buffer.Buffer[pos] = FormatCode.Array8;
buffer.Buffer[pos + 1] = (byte)(size + 1);
buffer.Buffer[pos + 2] = (byte)count;
Array.Copy(buffer.Buffer, pos + 9, buffer.Buffer, pos + 3, size);
buffer.Shrink(6);
}
else
{
buffer.Buffer[pos] = FormatCode.Array32;
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 1, size + 4);
AmqpBitConverter.WriteInt(buffer.Buffer, pos + 5, count);
}
}
}
