Merge webkit.org at r60469 : Initial merge by git.

Change-Id: I66a0047aa2af802f66bb0c7f2a8b02247a596234

1 files changed, 23 insertions, 0 deletions

diff --git a/JavaScriptCore/wtf/text/StringImpl.cpp b/JavaScriptCore/wtf/text/StringImpl.cpp
index 3606597..698cab9 100644
--- a/JavaScriptCore/wtf/text/StringImpl.cpp
+++ b/JavaScriptCore/wtf/text/StringImpl.cpp
@@ -476,6 +476,29 @@ static inline bool equalIgnoringCase(const UChar* a, const UChar* b, int length)
     return umemcasecmp(a, b, length) == 0;
 }
 
+int codePointCompare(const StringImpl* s1, const StringImpl* s2)
+{
+    const unsigned l1 = s1 ? s1->length() : 0;
+    const unsigned l2 = s2 ? s2->length() : 0;
+    const unsigned lmin = l1 < l2 ? l1 : l2;
+    const UChar* c1 = s1 ? s1->characters() : 0;
+    const UChar* c2 = s2 ? s2->characters() : 0;
+    unsigned pos = 0;
+    while (pos < lmin && *c1 == *c2) {
+        c1++;
+        c2++;
+        pos++;
+    }
+
+    if (pos < lmin)
+        return (c1[0] > c2[0]) ? 1 : -1;
+
+    if (l1 == l2)
+        return 0;
+
+    return (l1 > l2) ? 1 : -1;
+}
+
 int StringImpl::find(const char* chs, int index, bool caseSensitive)
 {
     if (!chs || index < 0)