check offset and don't crash

2010-03-01 09:24:59 -08:00
parent 7c02ef117e
commit 60919953ce
1 changed files with 5 additions and 1 deletions
--- a/core/java/android/text/TextUtils.java
+++ b/core/java/android/text/TextUtils.java
@@ -1557,13 +1557,17 @@ public class TextUtils {
     * @param reqModes The modes to be checked: may be any combination of
     * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and
     * {@link #CAP_MODE_SENTENCES}.
-     * 
+     *
     * @return Returns the actual capitalization modes that can be in effect
     * at the current position, which is any combination of
     * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and
     * {@link #CAP_MODE_SENTENCES}.
     */
    public static int getCapsMode(CharSequence cs, int off, int reqModes) {
+        if (off < 0) {
+            return 0;
+        }
+
        int i;
        char c;
        int mode = 0;