1 files changed, 18 insertions, 0 deletions
diff --git a/applap.go b/applap.go
new file mode 100644
index 0000000..efe7b6f
--- /dev/null
+++ b/applap.go
@@ -0,0 +1,18 @@
+//go:build appengine
+
+package rabaead
+
+import "reflect"
+
+func anyOverlap(x, y []byte) bool {
+	return len(x) > 0 && len(y) > 0 &&
+		reflect.ValueOf(&x[0]).Pointer() <= reflect.ValueOf(&y[len(y)-1]).Pointer() &&
+		reflect.ValueOf(&y[0]).Pointer() <= reflect.ValueOf(&x[len(x)-1]).Pointer()
+}
+
+func inexactOverlap(x, y []byte) bool {
+	if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] {
+		return false
+	}
+	return anyOverlap(x, y)
+}