imported AGI engine

svn-id: r22588

1 files changed, 73 insertions, 0 deletions

diff --git a/engines/agi/global.cpp b/engines/agi/global.cpp
new file mode 100644
index 0000000000..404726f2b7
--- /dev/null
+++ b/engines/agi/global.cpp
@@ -0,0 +1,73 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 The ScummVM project
+ *
+ * Copyright (C) 1999-2003 Sarien Team
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/stdafx.h"
+
+#include "agi/agi.h"
+
+namespace Agi {
+
+int getflag(int n) {
+	uint8 *set = (uint8 *) & game.flags;
+
+	set += n >> 3;
+	return (*set & (1 << (n & 0x07))) != 0;
+}
+
+void setflag(int n, int v) {
+	uint8 *set = (uint8 *) & game.flags;
+
+	set += n >> 3;
+	if (v)
+		*set |= 1 << (n & 0x07);	/* set bit  */
+	else
+		*set &= ~(1 << (n & 0x07));	/* clear bit */
+}
+
+void flipflag(int n) {
+	uint8 *set = (uint8 *) & game.flags;
+
+	set += n >> 3;
+	*set ^= 1 << (n & 0x07);	/* flip bit */
+}
+
+void setvar(int var, int val) {
+	game.vars[var] = val;
+}
+
+int getvar(int var) {
+	return game.vars[var];
+}
+
+void decrypt(uint8 *mem, int len) {
+	uint8 *key;
+	int i;
+
+	key = opt.agds ? (uint8 *)CRYPT_KEY_AGDS : (uint8 *)CRYPT_KEY_SIERRA;
+
+	for (i = 0; i < len; i++)
+		*(mem + i) ^= *(key + (i % 11));
+}
+
+}                             // End of namespace Agi