4 files changed, 32 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)
diff --git a/JavaScriptCore/wtf/text/StringImpl.h b/JavaScriptCore/wtf/text/StringImpl.h
index f4b2970..244009f 100644
--- a/JavaScriptCore/wtf/text/StringImpl.h
+++ b/JavaScriptCore/wtf/text/StringImpl.h
@@ -352,6 +352,8 @@ inline bool equalIgnoringCase(const char* a, const UChar* b, unsigned length) {
 
 bool equalIgnoringNullity(StringImpl*, StringImpl*);
 
+int codePointCompare(const StringImpl*, const StringImpl*);
+
 static inline bool isSpaceOrNewline(UChar c)
 {
     // Use isASCIISpace() for basic Latin-1.
diff --git a/JavaScriptCore/wtf/text/WTFString.cpp b/JavaScriptCore/wtf/text/WTFString.cpp
index 842d755..d744b15 100644
--- a/JavaScriptCore/wtf/text/WTFString.cpp
+++ b/JavaScriptCore/wtf/text/WTFString.cpp
@@ -126,6 +126,11 @@ String operator+(const char* cs, const String& s)
     return String(cs) + s;
 }
 
+int codePointCompare(const String& a, const String& b)
+{
+    return codePointCompare(a.impl(), b.impl());
+}
+
 void String::insert(const String& str, unsigned pos)
 {
     if (str.isEmpty()) {
diff --git a/JavaScriptCore/wtf/text/WTFString.h b/JavaScriptCore/wtf/text/WTFString.h
index d98621c..90d9a71 100644
--- a/JavaScriptCore/wtf/text/WTFString.h
+++ b/JavaScriptCore/wtf/text/WTFString.h
@@ -351,6 +351,8 @@ inline bool charactersAreAllASCII(const UChar* characters, size_t length)
     return !(ored & 0xFF80);
 }
 
+int codePointCompare(const String&, const String&);
+
 inline int find(const UChar* characters, size_t length, UChar character, int startPosition)
 {
     if (startPosition >= static_cast<int>(length))