public static long ReadInt64(Stream stream)
{
using (var r = new BinReader(stream))
{
return r.ReadInt64();
}
}
public static int ReadInt32(Stream stream)
{
using (var r = new BinReader(stream))
{
return r.ReadInt32();
}
}
public override void Decode(Stream inStream)
{
using (BinReader r = new BinReader(inStream))
{
clientMajorVersion = r.ReadInt32();
clientMinorVersion = r.ReadInt32();
}
base.Decode(inStream);
}
public static bool getBool(Stream inStream)
{
using (BinReader r = new BinReader(inStream))
{
int value = r.ReadInt32();
if (value == 0)
return false;
else if (value == 1)
return true;
else
throw new ProtocolCodecException
("Cannot interpret " + value + " as boolean");
}
}
private static void DecodeKeys(Stream inStream, ISet<Key> keys)
{
int len;
using (BinReader r = new BinReader(inStream))
{
len = r.ReadInt32();
}
for (int keysetCount = len; keysetCount > 0; keysetCount--)
keys.Add(new Key(XdrCoding.getBytes(inStream)));
}
public static Keys Decode(Stream inStream)
{
int length;
using (BinReader r = new BinReader(inStream))
{
length = r.ReadInt32();
}
if (length == 0)
return EmptyKeys;
try
{
Keys keys = new Keys();
for (; length > 0; length--)
{
using (BinReader r = new BinReader(inStream))
{
KeyScheme scheme = KeyScheme.SchemeFor(r.ReadInt32());
int keySetCount = r.ReadInt32();
if (scheme.IsDual())
{
if (keySetCount != 2)
throw new ProtocolCodecException("Dual key scheme with " + keySetCount + " key sets");
DualKeySet keyset = keys.NewKeysetFor((DualKeyScheme)scheme);
DecodeKeys(inStream, keyset.ProducerKeys);
DecodeKeys(inStream, keyset.ConsumerKeys);
}
else
{
if (keySetCount != 1)
throw new ProtocolCodecException
("Single key scheme with " + keySetCount + " key sets");
DecodeKeys(inStream, keys.NewKeysetFor((SingleKeyScheme)scheme));
}
}
}
return keys;
}
catch (ArgumentException ex)
{
// most likely an invalid KeyScheme ID
throw new ProtocolCodecException("Could not decode keys.", ex);
}
}
/// <summary>
/// Read an int >= 0 or generate an exception.
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
private static int getPositiveInt(Stream inStream)
{
using (BinReader r = new BinReader(inStream))
{
int value = r.ReadInt32();
if (value >= 0)
return value;
else
throw new ProtocolCodecException("Length cannot be negative: " + value);
}
}
/// <summary>
/// Read a length-delimited 4-byte-aligned UTF-8 string.
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
public static String getString(Stream inStream)
{
try
{
int length = getPositiveInt(inStream);
if (length == 0)
{
return "";
}
else
{
String s;
using (BinReader r = new BinReader(inStream))
{
byte[] b = r.ReadBytes(length);
s = FromUTF8(b, 0, length);
}
inStream.Seek(paddingFor(length), SeekOrigin.Current);
return s;
}
}
catch (Exception ex)
{
throw new ProtocolCodecException("Invalid UTF-8 string", ex);
}
}
/// <summary>
/// Read an object in type_id/value format.
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
public static Object getObject(Stream inStream)
{
using (BinReader r = new BinReader(inStream))
{
int type = r.ReadInt32();
switch (type)
{
case TYPE_INT32:
return r.ReadInt32();
case TYPE_INT64:
return r.ReadInt64();
case TYPE_REAL64:
return r.ReadDouble();
case TYPE_STRING:
return getString(inStream);
case TYPE_OPAQUE:
return getBytes(inStream);
default:
throw new ProtocolCodecException("Unknown type code: " + type);
}
}
}
/// <summary>
/// Read a length-demlimited array of longs.
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
public static long[] getLongArray(Stream inStream)
{
long[] longs = new long[getPositiveInt(inStream)];
using (BinReader r = new BinReader(inStream))
{
for (int i = 0; i < longs.Length; i++)
longs[i] = r.ReadInt64();
}
return longs;
}
