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/*
* Copyright (C) 2007-2014 Apple Inc. All rights reserved.
*
* 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
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#pragma once
#include <wtf/MainThread.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
class SpaceSplitStringData {
WTF_MAKE_NONCOPYABLE(SpaceSplitStringData);
WTF_MAKE_FAST_ALLOCATED;
public:
static RefPtr<SpaceSplitStringData> create(const AtomString&);
auto begin() const { return tokenArrayStart(); }
auto end() const { return tokenArrayStart() + size(); }
auto begin() { return tokenArrayStart(); }
auto end() { return tokenArrayStart() + size(); }
bool contains(const AtomString& string)
{
const AtomString* data = tokenArrayStart();
unsigned i = 0;
do {
if (data[i] == string)
return true;
++i;
} while (i < m_size);
return false;
}
bool containsAll(SpaceSplitStringData&);
unsigned size() const { return m_size; }
static constexpr ptrdiff_t sizeMemoryOffset() { return OBJECT_OFFSETOF(SpaceSplitStringData, m_size); }
const AtomString& operator[](unsigned i)
{
RELEASE_ASSERT(i < m_size);
return tokenArrayStart()[i];
}
void ref()
{
ASSERT(isMainThread());
ASSERT(m_refCount);
++m_refCount;
}
void deref()
{
ASSERT(isMainThread());
ASSERT(m_refCount);
unsigned tempRefCount = m_refCount - 1;
if (!tempRefCount) {
destroy(this);
return;
}
m_refCount = tempRefCount;
}
const AtomString& keyString() const { return m_keyString; }
static constexpr ptrdiff_t tokensMemoryOffset() { return sizeof(SpaceSplitStringData); }
private:
static Ref<SpaceSplitStringData> create(const AtomString&, unsigned tokenCount);
SpaceSplitStringData(const AtomString& string, unsigned size)
: m_keyString(string)
, m_refCount(1)
, m_size(size)
{
ASSERT(!string.isEmpty());
ASSERT_WITH_MESSAGE(m_size, "SpaceSplitStringData should never be empty by definition. There is no difference between empty and null.");
}
~SpaceSplitStringData() = default;
static void destroy(SpaceSplitStringData*);
AtomString* tokenArrayStart() { return reinterpret_cast<AtomString*>(this + 1); }
const AtomString* tokenArrayStart() const { return reinterpret_cast<const AtomString*>(this + 1); }
AtomString m_keyString;
unsigned m_refCount;
unsigned m_size;
};
class SpaceSplitString {
public:
SpaceSplitString() = default;
enum class ShouldFoldCase : bool { No, Yes };
SpaceSplitString(const AtomString&, ShouldFoldCase);
const AtomString& keyString() const
{
if (m_data)
return m_data->keyString();
return nullAtom();
}
friend bool operator==(const SpaceSplitString&, const SpaceSplitString&) = default;
void set(const AtomString&, ShouldFoldCase);
void clear() { m_data = nullptr; }
bool contains(const AtomString& string) const { return m_data && m_data->contains(string); }
bool containsAll(const SpaceSplitString& names) const { return !names.m_data || (m_data && m_data->containsAll(*names.m_data)); }
unsigned size() const { return m_data ? m_data->size() : 0; }
bool isEmpty() const { return !m_data; }
const AtomString& operator[](unsigned i) const
{
ASSERT_WITH_SECURITY_IMPLICATION(m_data);
return (*m_data)[i];
}
auto begin() const { return m_data ? m_data->begin() : nullptr; }
auto end() const { return m_data ? m_data->end() : nullptr; }
auto begin() { return m_data ? m_data->begin() : nullptr; }
auto end() { return m_data ? m_data->end() : nullptr; }
static bool spaceSplitStringContainsValue(StringView spaceSplitString, StringView value, ShouldFoldCase);
private:
RefPtr<SpaceSplitStringData> m_data;
};
inline SpaceSplitString::SpaceSplitString(const AtomString& string, ShouldFoldCase shouldFoldCase)
: m_data(!string.isEmpty() ? SpaceSplitStringData::create(shouldFoldCase == ShouldFoldCase::Yes ? string.convertToASCIILowercase() : string) : nullptr)
{
}
} // namespace WebCore
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