1 files changed, 55 insertions, 0 deletions
diff --git a/src/engine/e_msg.c b/src/engine/e_msg.c
new file mode 100644
index 00000000..adfb1cd3
--- /dev/null
+++ b/src/engine/e_msg.c
@@ -0,0 +1,55 @@
+/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */
+#include "e_interface.h"
+#include "e_packer.h"
+
+/* message packing */
+static PACKER msg_packer;
+static MSG_INFO pack_info;
+
+void msg_pack_int(int i) { packer_add_int(&msg_packer, i); }
+void msg_pack_string(const char *p, int limit) { packer_add_string(&msg_packer, p, limit); }
+void msg_pack_raw(const void *data, int size) { packer_add_raw(&msg_packer, (const unsigned char *)data, size); }
+
+void msg_pack_start_system(int msg, int flags)
+{
+	packer_reset(&msg_packer);
+	pack_info.msg = (msg<<1)|1;
+	pack_info.flags = flags;
+	
+	msg_pack_int(pack_info.msg);
+}
+
+void msg_pack_start(int msg, int flags)
+{
+	packer_reset(&msg_packer);
+	pack_info.msg = msg<<1;
+	pack_info.flags = flags;
+	
+	msg_pack_int(pack_info.msg);
+}
+
+void msg_pack_end()
+{
+	pack_info.size = packer_size(&msg_packer);
+	pack_info.data = packer_data(&msg_packer);
+}
+
+const MSG_INFO *msg_get_info()
+{
+	return &pack_info;
+}
+
+/* message unpacking */
+static UNPACKER msg_unpacker;
+int msg_unpack_start(const void *data, int data_size, int *system)
+{
+	int msg;
+	unpacker_reset(&msg_unpacker, (const unsigned char *)data, data_size);
+	msg = msg_unpack_int();
+	*system = msg&1;
+	return msg>>1;
+}
+
+int msg_unpack_int() { return unpacker_get_int(&msg_unpacker); }
+const char *msg_unpack_string() { return unpacker_get_string(&msg_unpacker); }
+const unsigned char *msg_unpack_raw(int size)  { return unpacker_get_raw(&msg_unpacker, size); }