PEGASUS: Import MMUtilities functions

3 files changed, 108 insertions, 1 deletions

diff --git a/engines/pegasus/MMShell/Utilities/MMUtilities.cpp b/engines/pegasus/MMShell/Utilities/MMUtilities.cpp
new file mode 100755
index 0000000000..a64b7dbbda
--- /dev/null
+++ b/engines/pegasus/MMShell/Utilities/MMUtilities.cpp
@@ -0,0 +1,63 @@
+/* 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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios
+ *
+ * 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.
+ *
+ */
+
+#include "common/random.h"
+#include "common/util.h"
+
+#include "pegasus/MMShell/Utilities/MMUtilities.h"
+
+namespace Pegasus {
+
+inline int32 Round(const int32 a, const int32 b) {
+	if (b < 0)
+		if (a < 0)
+			return -((a - (-b >> 1)) / -b);
+		else
+			return -((a + (-b >> 1)) / -b);
+	else
+		if (a < 0)
+			return (a - (b >> 1)) / b;
+		else
+			return (a + (b >> 1)) / b;
+}
+
+int32 LinearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2) {
+	if (start2 == stop2)
+		return start2;
+	else
+		return start2 + Round((current1 - start1) * (stop2 - start2), (stop1 - start1));
+}
+
+void ShuffleArray(int32 *arr, int32 count, Common::RandomSource &random) {	
+	if (count > 1) {
+		for (int32 i = 1; i < count; ++i) {
+			int32 j = random.getRandomNumber(i);
+			if (j != i)
+				SWAP(arr[i], arr[j]);
+		}
+	}
+}
+
+} // End of namespace Pegasus
diff --git a/engines/pegasus/MMShell/Utilities/MMUtilities.h b/engines/pegasus/MMShell/Utilities/MMUtilities.h
new file mode 100755
index 0000000000..4c504b1f5d
--- /dev/null
+++ b/engines/pegasus/MMShell/Utilities/MMUtilities.h
@@ -0,0 +1,43 @@
+/* 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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios
+ *
+ * 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.
+ *
+ */
+
+#ifndef PEGASUS_MMSHELL_UTILITIES_MMUTILITIES_H
+#define PEGASUS_MMSHELL_UTILITIES_MMUTILITIES_H
+
+#include "common/scummsys.h"
+
+namespace Common {
+	class RandomSource;
+}
+
+namespace Pegasus {
+
+int32 LinearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2);
+
+void ShuffleArray(int32 *arr, int32 count, Common::RandomSource &random);
+
+} // End of namespace Pegasus
+
+#endif
diff --git a/engines/pegasus/module.mk b/engines/pegasus/module.mk
index cb1f237d8f..050285f597 100644
--- a/engines/pegasus/module.mk
+++ b/engines/pegasus/module.mk
@@ -11,7 +11,8 @@ MODULE_OBJS = \
 	video.o \
 	Game_Shell/CItem.o \
 	MMShell/Sounds/MMSound.o \
-	MMShell/Utilities/MMResourceFile.o
+	MMShell/Utilities/MMResourceFile.o \
+	MMShell/Utilities/MMUtilities.o
 
 
 # This module can be built as a plugin