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/*
* Copyright (C) 2006 Lars Knoll <lars@trolltech.com>
* Copyright (C) 2008 Holger Hans Peter Freyther
*
* 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 "TextCodecQt.h"
#include "PlatformString.h"
#include <wtf/text/CString.h>
#include <qset.h>
namespace WebCore {
static QSet<QByteArray> *unique_names = 0;
static const char *getAtomicName(const QByteArray &name)
{
if (!unique_names)
unique_names = new QSet<QByteArray>;
unique_names->insert(name);
return unique_names->find(name)->constData();
}
void TextCodecQt::registerEncodingNames(EncodingNameRegistrar registrar)
{
QList<int> mibs = QTextCodec::availableMibs();
// qDebug() << ">>>>>>>>> registerEncodingNames";
for (int i = 0; i < mibs.size(); ++i) {
QTextCodec *c = QTextCodec::codecForMib(mibs.at(i));
const char *name = getAtomicName(c->name());
registrar(name, name);
// qDebug() << " " << name << name;
QList<QByteArray> aliases = c->aliases();
for (int i = 0; i < aliases.size(); ++i) {
const char *a = getAtomicName(aliases.at(i));
// qDebug() << " (a) " << a << name;
registrar(a, name);
}
}
}
static PassOwnPtr<TextCodec> newTextCodecQt(const TextEncoding& encoding, const void*)
{
return new TextCodecQt(encoding);
}
void TextCodecQt::registerCodecs(TextCodecRegistrar registrar)
{
QList<int> mibs = QTextCodec::availableMibs();
// qDebug() << ">>>>>>>>> registerCodecs";
for (int i = 0; i < mibs.size(); ++i) {
QTextCodec *c = QTextCodec::codecForMib(mibs.at(i));
const char *name = getAtomicName(c->name());
// qDebug() << " " << name;
registrar(name, newTextCodecQt, 0);
}
}
TextCodecQt::TextCodecQt(const TextEncoding& encoding)
: m_encoding(encoding)
{
m_codec = QTextCodec::codecForName(m_encoding.name());
}
TextCodecQt::~TextCodecQt()
{
}
String TextCodecQt::decode(const char* bytes, size_t length, bool flush, bool /*stopOnError*/, bool& sawError)
{
// We chop input buffer to smaller buffers to avoid excessive memory consumption
// when the input buffer is big. This helps reduce peak memory consumption in
// mobile devices where system RAM is limited.
#if OS(SYMBIAN)
static const int MaxInputChunkSize = 32 * 1024;
#else
static const int MaxInputChunkSize = 1024 * 1024;
#endif
const char* buf = bytes;
const char* end = buf + length;
String unicode(""); // a non-null string is expected
while (buf < end) {
int size = end - buf;
size = qMin(size, MaxInputChunkSize);
QString decoded = m_codec->toUnicode(buf, size, &m_state);
unicode.append(reinterpret_cast_ptr<const UChar*>(decoded.unicode()), decoded.length());
buf += size;
}
sawError = m_state.invalidChars != 0;
if (flush) {
m_state.flags = QTextCodec::DefaultConversion;
m_state.remainingChars = 0;
m_state.invalidChars = 0;
}
return unicode;
}
CString TextCodecQt::encode(const UChar* characters, size_t length, UnencodableHandling handling)
{
QTextCodec::ConverterState state;
state.flags = QTextCodec::ConversionFlags(QTextCodec::ConvertInvalidToNull | QTextCodec::IgnoreHeader);
if (!length)
return "";
QByteArray ba = m_codec->fromUnicode(reinterpret_cast<const QChar*>(characters), length, &state);
// If some <b> characters </b> are unencodable, escape them as specified by <b> handling </b>
// We append one valid encoded chunk to a QByteArray at a time. When we encounter an unencodable chunk we
// escape it with getUnencodableReplacement, append it, then move to the next chunk.
if (state.invalidChars) {
state.invalidChars = 0;
state.remainingChars = 0;
int len = 0;
ba.clear();
for (size_t pos = 0; pos < length; ++pos) {
QByteArray tba = m_codec->fromUnicode(reinterpret_cast<const QChar*>(characters), ++len, &state);
if (state.remainingChars)
continue;
if (state.invalidChars) {
UnencodableReplacementArray replacement;
getUnencodableReplacement(characters[0], handling, replacement);
tba.replace('\0', replacement);
state.invalidChars = 0;
}
ba.append(tba);
characters += len;
len = 0;
state.remainingChars = 0;
}
}
return CString(ba.constData(), ba.length());
}
} // namespace WebCore
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