Match <area shape> ASCII case-insensitively

third_party/WebKit/Source/wtf/text/StringImpl.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller ( mueller@kde.org )
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 2258 matching lines @@
 
 bool equalIgnoringNullity(StringImpl* a, StringImpl* b)
 {
     if (!a && b && !b->length())
         return true;
     if (!b && a && !a->length())
         return true;
     return equal(a, b);
 }
 
+bool equalIgnoringASCIICase(const StringImpl* a, const StringImpl* b)
+{
+    if (!a || !b)
+        return !a == !b;
+    unsigned length = b->length();
+    if (a->length() != length)
+        return false;
+    if (a->is8Bit()) {
+        if (b->is8Bit())
+            return equalIgnoringASCIICase(a->characters8(), b->characters8(), length);
+        return equalIgnoringASCIICase(a->characters8(), b->characters16(), length);
+    }
+    if (b->is8Bit())
+        return equalIgnoringASCIICase(a->characters16(), b->characters8(), length);
+    return equalIgnoringASCIICase(a->characters16(), b->characters16(), length);
+}
+
+bool equalIgnoringASCIICase(const StringImpl* a, const LChar* b)
+{
+    if (!a || !b)
+        return !a == !b;
+    size_t length = strlen(reinterpret_cast<const char*>(b));
+    RELEASE_ASSERT(length <= numeric_limits<unsigned>::max());
+    if (length != a->length())
+        return false;
+    return equalSubstringIgnoringASCIICase(a, 0, b, length);
+}
+
 size_t StringImpl::sizeInBytes() const
 {
     size_t size = length();
     if (!is8Bit())
         size *= 2;
     return size + sizeof(*this);
 }
 
 UChar32 toUpper(UChar32 c, const AtomicString& localeIdentifier)
 {
     if (!localeIdentifier.isNull()) {
         if (localeIdMatchesLang(localeIdentifier, "tr") || localeIdMatchesLang(localeIdentifier, "az")) {
             if (c == 'i')
                 return latinCapitalLetterIWithDotAbove;
             if (c == latinSmallLetterDotlessI)
                 return 'I';
         } else if (localeIdMatchesLang(localeIdentifier, "lt")) {
             // TODO(rob.buis) implement upper-casing rules for lt
             // like in StringImpl::upper(locale).
         }
     }
 
     return toUpper(c);
 }
 
 } // namespace WTF