GLK: ALAN3: Initial files commit

1 files changed, 65 insertions, 0 deletions

diff --git a/engines/glk/alan3/lists.cpp b/engines/glk/alan3/lists.cpp
new file mode 100644
index 0000000000..bb330c3301
--- /dev/null
+++ b/engines/glk/alan3/lists.cpp
@@ -0,0 +1,65 @@
+/* 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 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 "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 == EOF */
+void implementationOfSetEndOfArray(Aword *adr)
+{
+	*adr = EOF;
+}
+
+
+bool implementationOfIsEndOfList(Aword *adr)
+{
+	return *adr == EOF;
+}
+
+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 == NULL)
+      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