am 3fe79dfd: Merge "Adds utility method to convert 0.25 secs to decimal degrees"

* commit '3fe79dfdf4ca63535ec9e586ebed553a862061ea':
  Adds utility method to convert 0.25 secs to decimal degrees

api/current.txt

@@ -19290,6 +19290,7 @@ package android.telephony.cdma {
   public class CdmaCellLocation extends android.telephony.CellLocation {
     ctor public CdmaCellLocation();
     ctor public CdmaCellLocation(android.os.Bundle);
+    method public static double convertQuartSecToDecDegrees(int);
     method public void fillInNotifierBundle(android.os.Bundle);
     method public int getBaseStationId();
     method public int getBaseStationLatitude();

telephony/java/android/telephony/cdma/CdmaCellLocation.java

@@ -227,6 +227,22 @@ public class CdmaCellLocation extends CellLocation {
                 this.mNetworkId == -1);
     }
 
+    /**
+     * Converts latitude or longitude from 0.25 seconds (as defined in the
+     * 3GPP2 C.S0005-A v6.0 standard) to decimal degrees
+     *
+     * @param quartSec latitude or longitude in 0.25 seconds units
+     * @return latitude or longitude in decimal degrees units
+     * @throws IllegalArgumentException if value is less than -2592000,
+     *                                  greater than 2592000, or is not a number.
+     */
+    public static double convertQuartSecToDecDegrees(int quartSec) {
+        if(Double.isNaN(quartSec) || quartSec < -2592000 || quartSec > 2592000){
+            // Invalid value
+            throw new IllegalArgumentException("Invalid coordiante value:" + quartSec);
+        }
+        return ((double)quartSec) / (3600 * 4);
+    }
 
 }