Convert ids into geocodes

2 files changed, 24 insertions, 0 deletions

diff --git a/main/src/cgeo/geocaching/connector/GCConnectorImpl.java b/main/src/cgeo/geocaching/connector/gc/GCBase.java
index 439ff7a..439ff7a 100644
--- a/main/src/cgeo/geocaching/connector/GCConnectorImpl.java
+++ b/main/src/cgeo/geocaching/connector/gc/GCBase.java
diff --git a/main/src/cgeo/geocaching/connector/gc/UTFGrid.java b/main/src/cgeo/geocaching/connector/gc/UTFGrid.java
new file mode 100644
index 0000000..9e635c9
--- /dev/null
+++ b/main/src/cgeo/geocaching/connector/gc/UTFGrid.java
@@ -0,0 +1,24 @@
+package cgeo.geocaching.connector.gc;
+
+/**
+ *
+ * @author blafoo
+ *
+ * @see https://github.com/mapbox/mbtiles-spec/blob/master/1.1/utfgrid.md
+ * 
+ */
+public class UTFGrid {
+
+    /** Convert a value from a JSON grid object into an id that can be used as an index */
+    public static byte getUTFGridId(final byte value) {
+        byte result = value;
+        if (result >= 93) {
+            result--;
+        }
+        if (result >= 35) {
+            result--;
+        }
+        return (byte) (result - 32);
+    }
+
+}