Imported Upstream version 9.5.0upstream/9.5.0upstream

1 files changed, 52 insertions, 0 deletions

diff --git a/ipl/packs/loadfuncpp/examples/jmexample.cpp b/ipl/packs/loadfuncpp/examples/jmexample.cpp
new file mode 100644
index 0000000..a367fd5
--- /dev/null
+++ b/ipl/packs/loadfuncpp/examples/jmexample.cpp
@@ -0,0 +1,52 @@
+
+/* Example of a C++ extension to icon via loadfunc,
+ * without garbage collection difficulties.
+ * Type 'make <platform>' to build.
+ * For available <platform>s type 'make'.
+ * Carl Sturtivant, 2007/9/25
+ */
+
+#include "loadfuncpp.h"
+
+enum { JMUP, JMDOWN };
+class sequence: public generator {
+    long count;
+    long limit;
+    int direction;
+    bool hasNext() {
+		switch(direction) {
+			case JMUP:
+				return count <= limit;
+			case JMDOWN:
+				return count >= limit;
+			default:
+				return false;
+		}
+    }
+    value giveNext() {
+		switch(direction) {
+			case JMUP:
+				return count++;
+			case JMDOWN:
+				return count--;
+			default:
+				return nullvalue;
+        }
+    }
+  public:
+    sequence(value start, value end) {
+		count = start;
+		limit = end;
+		direction = ((count < limit) ? JMUP : JMDOWN);
+    };
+};
+
+extern "C" int jm_test_1(int argc, value argv[]) {
+    if( argc != 2 ) {
+		return FAILED;
+    }
+    sequence s(argv[1], argv[2]);
+    return s.generate(argv);
+}
+
+