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engines/glk/tads/tads2/data.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "glk/tads/tads2/data.h"
+#include "glk/tads/tads2/lib.h"
+#include "glk/tads/tads2/run.h"
+#include "glk/tads/tads2/vocabulary.h"
+#include "glk/tads/os_glk.h"
+#include "common/algorithm.h"
+
+namespace Glk {
+namespace TADS {
+namespace TADS2 {
+
+/* return size of a data value */
+uint datsiz(dattyp typ, const void *val)
+{
+	switch(typ)
+	{
+	case DAT_NUMBER:
+		return(4);                /* numbers are in 4-byte lsb-first format */
+
+	case DAT_OBJECT:
+		return(2);         /* object numbers are in 2-byte lsb-first format */
+
+	case DAT_SSTRING:
+	case DAT_DSTRING:
+	case DAT_LIST:
+		return(osrp2((const char *)val));
+
+	case DAT_NIL:
+	case DAT_TRUE:
+		return(0);
+
+	case DAT_PROPNUM:
+	case DAT_SYN:
+	case DAT_FNADDR:
+	case DAT_REDIR:
+		return(2);
+
+	case DAT_TPL:
+		/* template is counted array of 10-byte entries, plus length byte */
+		return(1 + ((*(const uchar *)val) * VOCTPLSIZ));
+
+	case DAT_TPL2:
+		return(1 + ((*(const uchar *)val) * VOCTPL2SIZ));
+
+	default:
+		return(0);
+	}
+}
+
+} // End of namespace TADS2
+} // End of namespace TADS
+} // End of namespace Glk