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      1 /*
      2  * Copyright (C) 2005, 2006, 2009 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #include "config.h"
     21 
     22 #ifdef SKIP_STATIC_CONSTRUCTORS_ON_GCC
     23 #define WEBCORE_QUALIFIEDNAME_HIDE_GLOBALS 1
     24 #else
     25 #define QNAME_DEFAULT_CONSTRUCTOR
     26 #endif
     27 
     28 #include "QualifiedName.h"
     29 #include <wtf/Assertions.h>
     30 #include <wtf/HashSet.h>
     31 #include <wtf/StaticConstructors.h>
     32 
     33 namespace WebCore {
     34 
     35 typedef HashSet<QualifiedName::QualifiedNameImpl*, QualifiedNameHash> QNameSet;
     36 
     37 struct QNameComponentsTranslator {
     38     static unsigned hash(const QualifiedNameComponents& components)
     39     {
     40         return hashComponents(components);
     41     }
     42     static bool equal(QualifiedName::QualifiedNameImpl* name, const QualifiedNameComponents& c)
     43     {
     44         return c.m_prefix == name->m_prefix.impl() && c.m_localName == name->m_localName.impl() && c.m_namespace == name->m_namespace.impl();
     45     }
     46     static void translate(QualifiedName::QualifiedNameImpl*& location, const QualifiedNameComponents& components, unsigned)
     47     {
     48         location = QualifiedName::QualifiedNameImpl::create(components.m_prefix, components.m_localName, components.m_namespace).releaseRef();
     49     }
     50 };
     51 
     52 static QNameSet* gNameCache;
     53 
     54 void QualifiedName::init(const AtomicString& p, const AtomicString& l, const AtomicString& n)
     55 {
     56     if (!gNameCache)
     57         gNameCache = new QNameSet;
     58     QualifiedNameComponents components = { p.impl(), l.impl(), n.isEmpty() ? nullAtom.impl() : n.impl() };
     59     pair<QNameSet::iterator, bool> addResult = gNameCache->add<QualifiedNameComponents, QNameComponentsTranslator>(components);
     60     m_impl = *addResult.first;
     61     if (!addResult.second)
     62         m_impl->ref();
     63 }
     64 
     65 QualifiedName::QualifiedName(const AtomicString& p, const AtomicString& l, const AtomicString& n)
     66 {
     67     init(p, l, n);
     68 }
     69 
     70 QualifiedName::QualifiedName(const AtomicString& p, const char* l, const AtomicString& n)
     71 {
     72     init(p, AtomicString(l), n);
     73 }
     74 
     75 QualifiedName::~QualifiedName()
     76 {
     77     deref();
     78 }
     79 
     80 void QualifiedName::deref()
     81 {
     82 #ifdef QNAME_DEFAULT_CONSTRUCTOR
     83     if (!m_impl)
     84         return;
     85 #endif
     86     ASSERT(!isHashTableDeletedValue());
     87 
     88     if (m_impl->hasOneRef())
     89         gNameCache->remove(m_impl);
     90     m_impl->deref();
     91 }
     92 
     93 String QualifiedName::toString() const
     94 {
     95     String local = localName();
     96     if (hasPrefix()) {
     97         String result = prefix().string();
     98         result.append(":");
     99         result.append(local);
    100         return result;
    101     }
    102     return local;
    103 }
    104 
    105 // Global init routines
    106 DEFINE_GLOBAL(QualifiedName, anyName, nullAtom, starAtom, starAtom)
    107 
    108 void QualifiedName::init()
    109 {
    110     static bool initialized;
    111     if (!initialized) {
    112         // Use placement new to initialize the globals.
    113 
    114         AtomicString::init();
    115         new ((void*)&anyName) QualifiedName(nullAtom, starAtom, starAtom);
    116         initialized = true;
    117     }
    118 }
    119 
    120 const AtomicString& QualifiedName::localNameUpper() const
    121 {
    122     if (!m_impl->m_localNameUpper)
    123         m_impl->m_localNameUpper = m_impl->m_localName.upper();
    124     return m_impl->m_localNameUpper;
    125 }
    126 
    127 }
    128