Add libcody

In order to separate compiler from build system, C++ Modules, as
implemented in GCC introduces a communication channel between those
two entities.  This is implemented by libcody.  It is anticipated that
other implementations will also implement this protocol, or use
libcody to provide it.

	* Makefile.def: Add libcody.
	* configure.ac: Add libcody.
	* Makefile.in: Regenerated.
	* configure: Regenerated.
	gcc/
	* Makefile.in (CODYINC, CODYLIB, CODYLIB_H): New. Use them.
	libcody/
	* configure.ac: New.
	* CMakeLists.txt: New.
	* CODING.md: New.
	* CONTRIB.md: New.
	* LICENSE: New.
	* LICENSE.gcc: New.
	* Makefile.in: New.
	* Makesub.in: New.
	* README.md: New.
	* buffer.cc: New.
	* build-aux/config.guess: New.
	* build-aux/config.sub: New.
	* build-aux/install-sh: New.
	* client.cc: New.
	* cmake/libcody-config-ix.cmake
	* cody.hh: New.
	* config.h.in: New.
	* config.m4: New.
	* configure: New.
	* configure.ac: New.
	* dox.cfg.in: New.
	* fatal.cc: New.
	* gdbinit.in: New.
	* internal.hh: New.
	* netclient.cc: New.
	* netserver.cc: New.
	* packet.cc: New.
	* resolver.cc: New.
	* server.cc: New.
	* tests/01-serialize/connect.cc: New.
	* tests/01-serialize/decoder.cc: New.
	* tests/01-serialize/encoder.cc: New.
	* tests/02-comms/client-1.cc: New.
	* tests/02-comms/pivot-1.cc: New.
	* tests/02-comms/server-1.cc: New.
	* tests/Makesub.in: New.
	* tests/jouster: New.

1 files changed, 50 insertions, 0 deletions

diff --git a/libcody/packet.cc b/libcody/packet.cc
new file mode 100644
index 0000000..65dc8f4
--- /dev/null
+++ b/libcody/packet.cc
@@ -0,0 +1,50 @@
+// CODYlib		-*- mode:c++ -*-
+// Copyright (C) 2020 Nathan Sidwell, nathan@acm.org
+// License: Apache v2.0
+
+// Cody
+#include "internal.hh"
+
+namespace Cody {
+
+void Packet::Destroy ()
+{
+  switch (cat)
+    {
+    case STRING:
+      // Silly scope destructor name rules
+      using S = std::string;
+      string.~S ();
+      break;
+
+    case VECTOR:
+      using V = std::vector<std::string>;
+      vector.~V ();
+      break;
+
+    default:;
+    }
+}
+
+void Packet::Create (Packet &&t)
+{
+  cat = t.cat;
+  code = t.code;
+  request = t.request;
+  switch (cat)
+    {
+    case STRING:
+      new (&string) std::string (std::move (t.string));
+      break;
+
+    case VECTOR:
+      new (&vector) std::vector<std::string> (std::move (t.vector));
+      break;
+
+    default:
+      integer = t.integer;
+      break;
+    }
+}
+
+}