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engines/glk/alan3/lists.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/alan3/lists.h"
+#include "glk/alan3/syserr.h"
+
+namespace Glk {
+namespace Alan3 {
+
+void initArray(void *array) {
+	implementationOfSetEndOfArray((Aword *)array);
+}
+
+/* How to know we are at end of a table or array, first Aword == EOD */
+void implementationOfSetEndOfArray(Aword *adr) {
+	*adr = EOD;
+}
+
+
+bool implementationOfIsEndOfList(Aword *adr) {
+	return *adr == EOD;
+}
+
+int lengthOfArrayImplementation(void *array_of_any_type, int element_size_in_bytes) {
+	int length;
+	int element_size = element_size_in_bytes / sizeof(Aword);
+	Aword *array = (Aword *)array_of_any_type;
+	if (array == nullptr)
+		syserr("Taking length of NULL array");
+	for (length = 0; !isEndOfArray(&array[length * element_size]); length++)
+		;
+	return length;
+}
+
+void addElementImplementation(void *array_of_any_type, void *element, int element_size_in_bytes) {
+	Aword *array = (Aword *)array_of_any_type;
+	int length = lengthOfArray(array);
+	int element_size_in_words = element_size_in_bytes / sizeof(Aword);
+	memcpy(&array[length * element_size_in_words], element, element_size_in_bytes);
+	setEndOfArray(&array[(length + 1)*element_size_in_words]);
+}
+
+} // End of namespace Alan3
+} // End of namespace Glk