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/*
* Copyright (C) 2008 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2010. 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
*/
#include "config.h"
#include "StringBuilder.h"
#include <wtf/text/StringBuffer.h>
namespace WebCore {
void StringBuilder::append(const String& string)
{
if (string.isNull())
return;
if (m_totalLength == UINT_MAX)
m_totalLength = string.length();
else
m_totalLength += string.length();
if (!string.isEmpty())
m_strings.append(string);
}
void StringBuilder::append(UChar c)
{
if (m_totalLength == UINT_MAX)
m_totalLength = 1;
else
m_totalLength += 1;
m_strings.append(String(&c, 1));
}
void StringBuilder::append(char c)
{
if (m_totalLength == UINT_MAX)
m_totalLength = 1;
else
m_totalLength += 1;
m_strings.append(String(&c, 1));
}
String StringBuilder::toString(ConcatMode mode) const
{
if (isNull())
return String();
unsigned count = m_strings.size();
if (!count)
return String(StringImpl::empty());
if (count == 1)
return m_strings[0];
UChar* buffer;
unsigned totalLength = m_totalLength;
if (mode == ConcatAddingSpacesBetweenIndividualStrings)
totalLength += count - 1;
String result = String::createUninitialized(totalLength, buffer);
UChar* p = buffer;
// We could handle both Concat modes in a single for loop, not doing that for performance reasons.
if (mode == ConcatUnaltered) {
for (unsigned i = 0; i < count; ++i) {
StringImpl* string = m_strings[i].impl();
unsigned length = string->length();
memcpy(p, string->characters(), length * 2);
p += length;
}
} else {
ASSERT(mode == ConcatAddingSpacesBetweenIndividualStrings);
for (unsigned i = 0; i < count; ++i) {
StringImpl* string = m_strings[i].impl();
unsigned length = string->length();
memcpy(p, string->characters(), length * 2);
p += length;
// Add space after string before the start of the next string, if we're not processing the last string.
if (i < count - 1) {
*p = ' ';
++p;
}
}
}
ASSERT(p == totalLength + buffer);
return result;
}
void StringBuilder::clear()
{
m_totalLength = UINT_MAX;
m_strings.clear();
}
unsigned StringBuilder::length() const
{
if (m_totalLength == UINT_MAX)
return 0;
return m_totalLength;
}
}
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