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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef StringReference_h
#define StringReference_h
#include <wtf/Forward.h>
#include <wtf/HashTraits.h>
namespace CoreIPC {
class ArgumentEncoder;
class ArgumentDecoder;
class StringReference {
public:
StringReference()
: m_data(0)
, m_size(0)
{
}
StringReference(const char* data, size_t size)
: m_data(data)
, m_size(size)
{
}
template<size_t length>
StringReference(const char (&string)[length])
: m_data(string)
, m_size(length - 1)
{
}
bool isEmpty() const { return !m_size; }
size_t size() const { return m_size; }
const char* data() const { return m_data; }
CString toString() const;
friend bool operator==(const StringReference& a, const StringReference& b)
{
return a.m_size == b.m_size && !memcmp(a.m_data, b.m_data, a.m_size);
}
void encode(ArgumentEncoder&) const;
static bool decode(ArgumentDecoder&, StringReference&);
struct Hash {
static unsigned hash(const StringReference& a);
static bool equal(const StringReference& a, const StringReference& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
private:
const char* m_data;
size_t m_size;
};
} // namespace CoreIPC
namespace WTF {
template<typename T> struct DefaultHash;
template<> struct DefaultHash<CoreIPC::StringReference> {
typedef CoreIPC::StringReference::Hash Hash;
};
template<> struct HashTraits<CoreIPC::StringReference> : GenericHashTraits<CoreIPC::StringReference> {
static const bool emptyValueIsZero = 0;
static void constructDeletedValue(CoreIPC::StringReference& stringReference) { stringReference = CoreIPC::StringReference(0, std::numeric_limits<size_t>::max()); }
static bool isDeletedValue(const CoreIPC::StringReference& stringReference) { return stringReference.size() == std::numeric_limits<size_t>::max(); }
};
} // namespace WTF
#endif // StringReference_h
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