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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SegmentedString.h"
namespace WebCore {
SegmentedString::SegmentedString(const SegmentedString &other)
: m_pushedChar1(other.m_pushedChar1)
, m_pushedChar2(other.m_pushedChar2)
, m_currentString(other.m_currentString)
, m_substrings(other.m_substrings)
, m_composite(other.m_composite)
, m_closed(other.m_closed)
{
if (other.m_currentChar == &other.m_pushedChar1)
m_currentChar = &m_pushedChar1;
else if (other.m_currentChar == &other.m_pushedChar2)
m_currentChar = &m_pushedChar2;
else
m_currentChar = other.m_currentChar;
}
const SegmentedString& SegmentedString::operator=(const SegmentedString &other)
{
m_pushedChar1 = other.m_pushedChar1;
m_pushedChar2 = other.m_pushedChar2;
m_currentString = other.m_currentString;
m_substrings = other.m_substrings;
m_composite = other.m_composite;
if (other.m_currentChar == &other.m_pushedChar1)
m_currentChar = &m_pushedChar1;
else if (other.m_currentChar == &other.m_pushedChar2)
m_currentChar = &m_pushedChar2;
else
m_currentChar = other.m_currentChar;
m_closed = other.m_closed;
return *this;
}
unsigned SegmentedString::length() const
{
unsigned length = m_currentString.m_length;
if (m_pushedChar1) {
++length;
if (m_pushedChar2)
++length;
}
if (m_composite) {
Deque<SegmentedSubstring>::const_iterator it = m_substrings.begin();
Deque<SegmentedSubstring>::const_iterator e = m_substrings.end();
for (; it != e; ++it)
length += it->m_length;
}
return length;
}
void SegmentedString::setExcludeLineNumbers()
{
if (m_composite) {
Deque<SegmentedSubstring>::iterator it = m_substrings.begin();
Deque<SegmentedSubstring>::iterator e = m_substrings.end();
for (; it != e; ++it)
it->setExcludeLineNumbers();
} else
m_currentString.setExcludeLineNumbers();
}
void SegmentedString::clear()
{
m_pushedChar1 = 0;
m_pushedChar2 = 0;
m_currentChar = 0;
m_currentString.clear();
m_substrings.clear();
m_composite = false;
m_closed = false;
}
void SegmentedString::append(const SegmentedSubstring &s)
{
ASSERT(!m_closed);
if (s.m_length) {
if (!m_currentString.m_length) {
m_currentString = s;
} else {
m_substrings.append(s);
m_composite = true;
}
}
}
void SegmentedString::prepend(const SegmentedSubstring &s)
{
ASSERT(!escaped());
if (s.m_length) {
if (!m_currentString.m_length)
m_currentString = s;
else {
// Shift our m_currentString into our list.
m_substrings.prepend(m_currentString);
m_currentString = s;
m_composite = true;
}
}
}
void SegmentedString::close()
{
// Closing a stream twice is likely a coding mistake.
ASSERT(!m_closed);
m_closed = true;
}
void SegmentedString::append(const SegmentedString &s)
{
ASSERT(!m_closed);
ASSERT(!s.escaped());
append(s.m_currentString);
if (s.m_composite) {
Deque<SegmentedSubstring>::const_iterator it = s.m_substrings.begin();
Deque<SegmentedSubstring>::const_iterator e = s.m_substrings.end();
for (; it != e; ++it)
append(*it);
}
m_currentChar = m_pushedChar1 ? &m_pushedChar1 : m_currentString.m_current;
}
void SegmentedString::prepend(const SegmentedString &s)
{
ASSERT(!escaped());
ASSERT(!s.escaped());
if (s.m_composite) {
Deque<SegmentedSubstring>::const_reverse_iterator it = s.m_substrings.rbegin();
Deque<SegmentedSubstring>::const_reverse_iterator e = s.m_substrings.rend();
for (; it != e; ++it)
prepend(*it);
}
prepend(s.m_currentString);
m_currentChar = m_pushedChar1 ? &m_pushedChar1 : m_currentString.m_current;
}
void SegmentedString::advanceSubstring()
{
if (m_composite) {
m_currentString = m_substrings.takeFirst();
if (m_substrings.isEmpty())
m_composite = false;
} else {
m_currentString.clear();
}
}
String SegmentedString::toString() const
{
String result;
if (m_pushedChar1) {
result.append(m_pushedChar1);
if (m_pushedChar2)
result.append(m_pushedChar2);
}
m_currentString.appendTo(result);
if (m_composite) {
Deque<SegmentedSubstring>::const_iterator it = m_substrings.begin();
Deque<SegmentedSubstring>::const_iterator e = m_substrings.end();
for (; it != e; ++it)
it->appendTo(result);
}
return result;
}
void SegmentedString::advance(unsigned count, UChar* consumedCharacters)
{
ASSERT(count <= length());
for (unsigned i = 0; i < count; ++i) {
consumedCharacters[i] = *current();
advance();
}
}
void SegmentedString::advanceSlowCase()
{
if (m_pushedChar1) {
m_pushedChar1 = m_pushedChar2;
m_pushedChar2 = 0;
} else if (m_currentString.m_current) {
++m_currentString.m_current;
if (--m_currentString.m_length == 0)
advanceSubstring();
}
m_currentChar = m_pushedChar1 ? &m_pushedChar1 : m_currentString.m_current;
}
void SegmentedString::advanceSlowCase(int& lineNumber)
{
if (m_pushedChar1) {
m_pushedChar1 = m_pushedChar2;
m_pushedChar2 = 0;
} else if (m_currentString.m_current) {
if (*m_currentString.m_current++ == '\n' && m_currentString.doNotExcludeLineNumbers())
++lineNumber;
if (--m_currentString.m_length == 0)
advanceSubstring();
}
m_currentChar = m_pushedChar1 ? &m_pushedChar1 : m_currentString.m_current;
}
}
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