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engines/scumm/util.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 "scumm/util.h"
+#include "common/util.h"
+#include "common/textconsole.h"
+
+namespace Scumm {
+
+#pragma mark -
+#pragma mark --- Utilities ---
+#pragma mark -
+
+void assertRange(int min, int value, int max, const char *desc) {
+	if (value < min || value > max) {
+		error("%s %d is out of bounds (%d,%d)", desc, value, min, max);
+	}
+}
+
+/**
+ * Convert an old style direction to a new style one (angle),
+ */
+int newDirToOldDir(int dir) {
+	if (dir >= 71 && dir <= 109)
+		return 1;
+	if (dir >= 109 && dir <= 251)
+		return 2;
+	if (dir >= 251 && dir <= 289)
+		return 0;
+	return 3;
+}
+
+/**
+ * Convert a new style (angle) direction to an old style one.
+ */
+int oldDirToNewDir(int dir) {
+	assert(0 <= dir && dir <= 3);
+	const int new_dir_table[4] = { 270, 90, 180, 0 };
+	return new_dir_table[dir];
+}
+
+/**
+ * Convert an angle to a simple direction.
+ */
+int toSimpleDir(int dirType, int dir) {
+	if (dirType) {
+		const int16 directions[] = { 22, 72, 107, 157, 202, 252, 287, 337 };
+		for (int i = 0; i < 7; i++)
+			if (dir >= directions[i] && dir <= directions[i+1])
+				return i+1;
+	} else {
+		const int16 directions[] = { 71, 109, 251, 289 };
+		for (int i = 0; i < 3; i++)
+			if (dir >= directions[i] && dir <= directions[i+1])
+				return i+1;
+	}
+
+	return 0;
+}
+
+/**
+ * Convert a simple direction to an angle.
+ */
+int fromSimpleDir(int dirType, int dir) {
+	if (dirType)
+		return dir * 45;
+	else
+		return dir * 90;
+}
+
+/**
+ * Normalize the given angle - that means, ensure it is positive, and
+ * change it to the closest multiple of 45 degree by abusing toSimpleDir.
+ */
+int normalizeAngle(int dirType, int angle) {
+	int temp;
+
+	temp = (angle + 360) % 360;
+
+	return toSimpleDir(dirType, temp) * (dirType ? 45 : 90);
+}
+
+void *reallocateArray(void *buffer, size_t count, size_t size) {
+	free(buffer);
+	return calloc(count, size);
+}
+
+} // End of namespace Scumm