// Header format is: yyyyuua{yv}
public byte[] GetHeaderData()
{
WvDbusWriter w = new WvDbusWriter();
w.Write((byte)endian);
w.Write((byte)type);
w.Write((byte)flags);
w.Write((byte)Dbus.Protocol.Version);
w.Write(Body != null ? (uint)Body.Length : 0);
w.Write((uint)serial);
// This two-step process is a little convoluted because of the
// way the WriteArray function needs to work. That, in turn,
// is convoluted because the alignment of an array is complicated:
// there's different padding for zero-element arrays than for
// nonzero-element arrays, and WriteArray does that for us,
// which means it needs to know in advance how many elements
// are in our array.
var l = new List<Dbus.Field>();
if (sender.ne())
l.Add(Dbus.Field.Sender);
if (dest.ne())
l.Add(Dbus.Field.Destination);
if (rserial.HasValue)
l.Add(Dbus.Field.ReplySerial);
if (signature.ne())
l.Add(Dbus.Field.Signature);
if (path.ne())
l.Add(Dbus.Field.Path);
if (ifc.ne())
l.Add(Dbus.Field.Interface);
if (method.ne())
l.Add(Dbus.Field.Member);
if (err.ne())
l.Add(Dbus.Field.ErrorName);
w.WriteArray(8, l, (w2, i) => {
switch (i)
{
case Dbus.Field.Sender:
wws(w2, i, "s", sender);
break;
case Dbus.Field.Destination:
wws(w2, i, "s", dest);
break;
case Dbus.Field.ReplySerial:
wv.assert(rserial.Value != 0);
wwu(w2, i, "u", rserial.Value);
break;
case Dbus.Field.Signature:
wwsig(w2, i, "g", signature);
break;
case Dbus.Field.Path:
wws(w2, i, "o", path);
break;
case Dbus.Field.Interface:
wws(w2, i, "s", ifc);
break;
case Dbus.Field.Member:
wws(w2, i, "s", method);
break;
case Dbus.Field.ErrorName:
wws(w2, i, "s", err);
break;
default:
break; // unknown field code, ignore
}
});
w.WritePad(8); // the header is *always* a multiple of 8
return w.ToArray();
}
// Utility API so you can say Get("foo").
public VxSchema Get(params string[] keys)
{
WvDbusMsg call = methodcall("GetSchema", "as");
WvDbusWriter writer = new WvDbusWriter();
if (keys == null)
keys = new string[0];
writer.WriteArray(4, keys, (w2, k) => {
w2.Write(k);
});
call.Body = writer.ToArray();
WvDbusMsg reply = bus.send_and_wait(call);
reply.check("a(sssy)");
VxSchema schema = new VxSchema(reply.iter().pop());
return schema;
}
static void WriteColInfo(WvDbusWriter writer, VxColumnInfo[] colinfo)
{
// a(issnny)
writer.WriteArray(8, colinfo, (w2, i) => {
w2.Write(i.size);
w2.Write(i.colname);
w2.Write(i.coltype.ToString());
w2.Write(i.precision);
w2.Write(i.scale);
w2.Write(i.nullable);
});
}
// A method exported over DBus but not exposed in ISchemaBackend
public VxSchemaErrors DropSchema(params string[] keys)
{
WvDbusMsg call = methodcall("DropSchema", "as");
WvDbusWriter writer = new WvDbusWriter();
writer.WriteArray(4, keys, (w2, k) => {
w2.Write(k);
});
call.Body = writer.ToArray();
WvDbusMsg reply = bus.send_and_wait(call);
if (reply.signature == VxSchemaErrors.GetDbusSignature())
return new VxSchemaErrors(reply.iter().pop());
else
reply.check(VxSchemaErrors.GetDbusSignature());
return null;
}
// a(issnny)vaay
public static WvDbusWriter PrepareRecordsetWriter(VxColumnInfo[] colinfo,
object[][] data,
byte[][] nulldata)
{
WvDbusWriter writer = new WvDbusWriter();
// a(issnny)
WriteColInfo(writer, colinfo);
// v
if (colinfo.Length <= 0)
{
// Some clients can't parse a() (empty struct) properly, so
// we'll have an empty array of (i) instead.
writer.WriteSig("a(i)");
}
else
writer.WriteSig(VxColumnInfoToArraySignature(colinfo));
// a(whatever)
writer.WriteArray(8, data, (w2, r) => {
for (int i = 0; i < colinfo.Length; i++)
WriteV(w2, colinfo[i].VxColumnType, r[i]);
});
// aay
writer.WriteArray(4, nulldata, (w2, r) => {
w2.Write(r);
});
return writer;
}
