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/*
* Copyright (C) 2003, 2006, 2008, 2009, 2010, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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.
*/
#include "config.h"
#include "CString.h"
using namespace std;
namespace WTF {
PassRefPtr<CStringBuffer> CStringBuffer::createUninitialized(size_t length)
{
if (length > (numeric_limits<size_t>::max() - sizeof(CStringBuffer)))
CRASH();
// CStringBuffer already has space for one character, we do not need to add +1 to the length
// to store the terminating zero.
size_t size = sizeof(CStringBuffer) + length;
CStringBuffer* stringBuffer = static_cast<CStringBuffer*>(fastMalloc(size));
return adoptRef(new (NotNull, stringBuffer) CStringBuffer(length));
}
CString::CString(const char* str)
{
if (!str)
return;
init(str, strlen(str));
}
CString::CString(const char* str, size_t length)
{
if (!str) {
ASSERT(!length);
return;
}
init(str, length);
}
void CString::init(const char* str, size_t length)
{
ASSERT(str);
m_buffer = CStringBuffer::createUninitialized(length);
memcpy(m_buffer->mutableData(), str, length);
m_buffer->mutableData()[length] = '\0';
}
char* CString::mutableData()
{
copyBufferIfNeeded();
if (!m_buffer)
return 0;
return m_buffer->mutableData();
}
CString CString::newUninitialized(size_t length, char*& characterBuffer)
{
CString result;
result.m_buffer = CStringBuffer::createUninitialized(length);
char* bytes = result.m_buffer->mutableData();
bytes[length] = '\0';
characterBuffer = bytes;
return result;
}
void CString::copyBufferIfNeeded()
{
if (!m_buffer || m_buffer->hasOneRef())
return;
RefPtr<CStringBuffer> buffer = m_buffer.release();
size_t length = buffer->length();
m_buffer = CStringBuffer::createUninitialized(length);
memcpy(m_buffer->mutableData(), buffer->data(), length + 1);
}
bool CString::isSafeToSendToAnotherThread() const
{
return !m_buffer || m_buffer->hasOneRef();
}
bool operator==(const CString& a, const CString& b)
{
if (a.isNull() != b.isNull())
return false;
if (a.length() != b.length())
return false;
return !memcmp(a.data(), b.data(), a.length());
}
bool operator==(const CString& a, const char* b)
{
if (a.isNull() != !b)
return false;
if (!b)
return true;
return !strcmp(a.data(), b);
}
} // namespace WTF
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