workaround for Java bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6242664

Java 1.5 has a bug where detecting codepoint offsets in strings that are
created by String.substring() gives wrong results. The new implementation
uses a different method, avoinding the issue.

The following code will crash without the fix:
        final String s = "abcdefg";
        final String ss = s.substring(3, 6);
        final int[] cps = OtpErlangString.stringToCodePoints(ss);

1 files changed, 10 insertions, 7 deletions

diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangString.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangString.java
index 23734bf83b..2d3a5a5d1c 100644
--- a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangString.java
+++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangString.java
@@ -154,13 +154,16 @@ public class OtpErlangString extends OtpErlangObject implements Serializable,
      *         Unicode code points
      */
 
-    public static int[] stringToCodePoints(final String s) {
-	final int m = s.codePointCount(0, s.length());
-	final int [] codePoints = new int[m];
-	for (int i = 0, j = 0;  j < m;  i = s.offsetByCodePoints(i, 1), j++) {
-	    codePoints[j] = s.codePointAt(i);
-	}
-	return codePoints;
+   public static int[] stringToCodePoints(final String s) {
+        final int m = s.codePointCount(0, s.length());
+        final int[] codePoints = new int[m];
+        int j = 0;
+        for (int offset = 0; offset < s.length();) {
+            final int codepoint = s.codePointAt(offset);
+            codePoints[j++] = codepoint;
+            offset += Character.charCount(codepoint);
+        }
+        return codePoints;
     }
 
     /**