Add utility functions for pause and tonewait pause.

Add a function that converts a string with RFC3601 defintion
of pause and wait into android representation.

Change-Id: Id8a17c3a166422d62247acb227506549990ace12

1 files changed, 37 insertions, 0 deletions

diff --git a/telephony/java/android/telephony/PhoneNumberUtils.java b/telephony/java/android/telephony/PhoneNumberUtils.java
index c1713a5..51922da 100644
--- a/telephony/java/android/telephony/PhoneNumberUtils.java
+++ b/telephony/java/android/telephony/PhoneNumberUtils.java
@@ -122,6 +122,17 @@ public class PhoneNumberUtils
         return c == PAUSE || c == WAIT;
     }
 
+    private static boolean
+    isPause (char c){
+        return c == 'p'||c == 'P';
+    }
+
+    private static boolean
+    isToneWait (char c){
+        return c == 'w'||c == 'W';
+    }
+
+
     /** Returns true if ch is not dialable or alpha char */
     private static boolean isSeparator(char ch) {
         return !isDialable(ch) && !(('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z'));
@@ -278,6 +289,32 @@ public class PhoneNumberUtils
         return ret.toString();
     }
 
+    /**
+     * Converts pause and tonewait pause characters
+     * to Android representation.
+     * RFC 3601 says pause is 'p' and tonewait is 'w'.
+     * @hide
+     */
+    public static String convertPreDial(String phoneNumber) {
+        if (phoneNumber == null) {
+            return null;
+        }
+        int len = phoneNumber.length();
+        StringBuilder ret = new StringBuilder(len);
+
+        for (int i = 0; i < len; i++) {
+            char c = phoneNumber.charAt(i);
+
+            if (isPause(c)) {
+                c = PAUSE;
+            } else if (isToneWait(c)) {
+                c = WAIT;
+            }
+            ret.append(c);
+        }
+        return ret.toString();
+    }
+
     /** or -1 if both are negative */
     static private int
     minPositive (int a, int b) {