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|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Linguist of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "translator.h"
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QMap>
#include <QtCore/QString>
#include <QtCore/QTextCodec>
QT_BEGIN_NAMESPACE
// magic number for the file
static const int MagicLength = 16;
static const uchar magic[MagicLength] = {
0x3c, 0xb8, 0x64, 0x18, 0xca, 0xef, 0x9c, 0x95,
0xcd, 0x21, 0x1c, 0xbf, 0x60, 0xa1, 0xbd, 0xdd
};
namespace {
enum Tag {
Tag_End = 1,
Tag_SourceText16 = 2,
Tag_Translation = 3,
Tag_Context16 = 4,
Tag_Obsolete1 = 5,
Tag_SourceText = 6,
Tag_Context = 7,
Tag_Comment = 8,
Tag_Obsolete2 = 9
};
enum Prefix {
NoPrefix,
Hash,
HashContext,
HashContextSourceText,
HashContextSourceTextComment
};
} // namespace anon
static uint elfHash(const QByteArray &ba)
{
const uchar *k = (const uchar *)ba.data();
uint h = 0;
uint g;
if (k) {
while (*k) {
h = (h << 4) + *k++;
if ((g = (h & 0xf0000000)) != 0)
h ^= g >> 24;
h &= ~g;
}
}
if (!h)
h = 1;
return h;
}
class ByteTranslatorMessage
{
public:
ByteTranslatorMessage(
const QByteArray &context,
const QByteArray &sourceText,
const QByteArray &comment,
const QStringList &translations) :
m_context(context),
m_sourcetext(sourceText),
m_comment(comment),
m_translations(translations)
{}
const QByteArray &context() const { return m_context; }
const QByteArray &sourceText() const { return m_sourcetext; }
const QByteArray &comment() const { return m_comment; }
const QStringList &translations() const { return m_translations; }
bool operator<(const ByteTranslatorMessage& m) const;
private:
QByteArray m_context;
QByteArray m_sourcetext;
QByteArray m_comment;
QStringList m_translations;
};
Q_DECLARE_TYPEINFO(ByteTranslatorMessage, Q_MOVABLE_TYPE);
bool ByteTranslatorMessage::operator<(const ByteTranslatorMessage& m) const
{
if (m_context != m.m_context)
return m_context < m.m_context;
if (m_sourcetext != m.m_sourcetext)
return m_sourcetext < m.m_sourcetext;
return m_comment < m.m_comment;
}
class Releaser
{
public:
struct Offset {
Offset()
: h(0), o(0)
{}
Offset(uint hash, uint offset)
: h(hash), o(offset)
{}
bool operator<(const Offset &other) const {
return (h != other.h) ? h < other.h : o < other.o;
}
bool operator==(const Offset &other) const {
return h == other.h && o == other.o;
}
uint h;
uint o;
};
enum { Contexts = 0x2f, Hashes = 0x42, Messages = 0x69, NumerusRules = 0x88 };
Releaser() : m_codec(0) {}
void setCodecName(const QByteArray &codecName)
{
m_codec = QTextCodec::codecForName(codecName);
}
bool save(QIODevice *iod);
void insert(const TranslatorMessage &msg, bool forceComment);
void squeeze(TranslatorSaveMode mode);
void setNumerusRules(const QByteArray &rules);
private:
Q_DISABLE_COPY(Releaser)
// This should reproduce the byte array fetched from the source file, which
// on turn should be the same as passed to the actual tr(...) calls
QByteArray originalBytes(const QString &str, bool isUtf8) const;
void insertInternal(const TranslatorMessage &message, bool forceComment, bool isUtf8);
static Prefix commonPrefix(const ByteTranslatorMessage &m1, const ByteTranslatorMessage &m2);
static uint msgHash(const ByteTranslatorMessage &msg);
void writeMessage(const ByteTranslatorMessage & msg, QDataStream & stream,
TranslatorSaveMode strip, Prefix prefix) const;
// for squeezed but non-file data, this is what needs to be deleted
QByteArray m_messageArray;
QByteArray m_offsetArray;
QByteArray m_contextArray;
QMap<ByteTranslatorMessage, void *> m_messages;
QByteArray m_numerusRules;
// Used to reproduce the original bytes
QTextCodec *m_codec;
};
QByteArray Releaser::originalBytes(const QString &str, bool isUtf8) const
{
if (str.isEmpty()) {
// Do not use QByteArray() here as the result of the serialization
// will be different.
return QByteArray("");
}
if (isUtf8)
return str.toUtf8();
return m_codec ? m_codec->fromUnicode(str) : str.toLatin1();
}
uint Releaser::msgHash(const ByteTranslatorMessage &msg)
{
return elfHash(msg.sourceText() + msg.comment());
}
Prefix Releaser::commonPrefix(const ByteTranslatorMessage &m1, const ByteTranslatorMessage &m2)
{
if (msgHash(m1) != msgHash(m2))
return NoPrefix;
if (m1.context() != m2.context())
return Hash;
if (m1.sourceText() != m2.sourceText())
return HashContext;
if (m1.comment() != m2.comment())
return HashContextSourceText;
return HashContextSourceTextComment;
}
void Releaser::writeMessage(const ByteTranslatorMessage &msg, QDataStream &stream,
TranslatorSaveMode mode, Prefix prefix) const
{
for (int i = 0; i < msg.translations().count(); ++i) {
QString str = msg.translations().at(i);
str.replace(QChar(Translator::DefaultVariantSeparator),
QChar(Translator::InternalVariantSeparator));
stream << quint8(Tag_Translation) << str;
}
if (mode == SaveEverything)
prefix = HashContextSourceTextComment;
// lrelease produces "wrong" .qm files for QByteArrays that are .isNull().
switch (prefix) {
default:
case HashContextSourceTextComment:
stream << quint8(Tag_Comment) << msg.comment();
// fall through
case HashContextSourceText:
stream << quint8(Tag_SourceText) << msg.sourceText();
// fall through
case HashContext:
stream << quint8(Tag_Context) << msg.context();
break;
}
stream << quint8(Tag_End);
}
bool Releaser::save(QIODevice *iod)
{
QDataStream s(iod);
s.writeRawData((const char *)magic, MagicLength);
if (!m_offsetArray.isEmpty()) {
quint32 oas = quint32(m_offsetArray.size());
s << quint8(Hashes) << oas;
s.writeRawData(m_offsetArray.constData(), oas);
}
if (!m_messageArray.isEmpty()) {
quint32 mas = quint32(m_messageArray.size());
s << quint8(Messages) << mas;
s.writeRawData(m_messageArray.constData(), mas);
}
if (!m_contextArray.isEmpty()) {
quint32 cas = quint32(m_contextArray.size());
s << quint8(Contexts) << cas;
s.writeRawData(m_contextArray.constData(), cas);
}
if (!m_numerusRules.isEmpty()) {
quint32 nrs = m_numerusRules.size();
s << quint8(NumerusRules) << nrs;
s.writeRawData(m_numerusRules.constData(), nrs);
}
return true;
}
void Releaser::squeeze(TranslatorSaveMode mode)
{
if (m_messages.isEmpty() && mode == SaveEverything)
return;
QMap<ByteTranslatorMessage, void *> messages = m_messages;
// re-build contents
m_messageArray.clear();
m_offsetArray.clear();
m_contextArray.clear();
m_messages.clear();
QMap<Offset, void *> offsets;
QDataStream ms(&m_messageArray, QIODevice::WriteOnly);
QMap<ByteTranslatorMessage, void *>::const_iterator it, next;
int cpPrev = 0, cpNext = 0;
for (it = messages.constBegin(); it != messages.constEnd(); ++it) {
cpPrev = cpNext;
next = it;
++next;
if (next == messages.constEnd())
cpNext = 0;
else
cpNext = commonPrefix(it.key(), next.key());
offsets.insert(Offset(msgHash(it.key()), ms.device()->pos()), (void *)0);
writeMessage(it.key(), ms, mode, Prefix(qMax(cpPrev, cpNext + 1)));
}
QMap<Offset, void *>::Iterator offset;
offset = offsets.begin();
QDataStream ds(&m_offsetArray, QIODevice::WriteOnly);
while (offset != offsets.end()) {
Offset k = offset.key();
++offset;
ds << quint32(k.h) << quint32(k.o);
}
if (mode == SaveStripped) {
QMap<QByteArray, int> contextSet;
for (it = messages.constBegin(); it != messages.constEnd(); ++it)
++contextSet[it.key().context()];
quint16 hTableSize;
if (contextSet.size() < 200)
hTableSize = (contextSet.size() < 60) ? 151 : 503;
else if (contextSet.size() < 2500)
hTableSize = (contextSet.size() < 750) ? 1511 : 5003;
else
hTableSize = (contextSet.size() < 10000) ? 15013 : 3 * contextSet.size() / 2;
QMultiMap<int, QByteArray> hashMap;
QMap<QByteArray, int>::const_iterator c;
for (c = contextSet.constBegin(); c != contextSet.constEnd(); ++c)
hashMap.insert(elfHash(c.key()) % hTableSize, c.key());
/*
The contexts found in this translator are stored in a hash
table to provide fast lookup. The context array has the
following format:
quint16 hTableSize;
quint16 hTable[hTableSize];
quint8 contextPool[...];
The context pool stores the contexts as Pascal strings:
quint8 len;
quint8 data[len];
Let's consider the look-up of context "FunnyDialog". A
hash value between 0 and hTableSize - 1 is computed, say h.
If hTable[h] is 0, "FunnyDialog" is not covered by this
translator. Else, we check in the contextPool at offset
2 * hTable[h] to see if "FunnyDialog" is one of the
contexts stored there, until we find it or we meet the
empty string.
*/
m_contextArray.resize(2 + (hTableSize << 1));
QDataStream t(&m_contextArray, QIODevice::WriteOnly);
quint16 *hTable = new quint16[hTableSize];
memset(hTable, 0, hTableSize * sizeof(quint16));
t << hTableSize;
t.device()->seek(2 + (hTableSize << 1));
t << quint16(0); // the entry at offset 0 cannot be used
uint upto = 2;
QMap<int, QByteArray>::const_iterator entry = hashMap.constBegin();
while (entry != hashMap.constEnd()) {
int i = entry.key();
hTable[i] = quint16(upto >> 1);
do {
const char *con = entry.value().constData();
uint len = uint(entry.value().length());
len = qMin(len, 255u);
t << quint8(len);
t.writeRawData(con, len);
upto += 1 + len;
++entry;
} while (entry != hashMap.constEnd() && entry.key() == i);
if (upto & 0x1) {
// offsets have to be even
t << quint8(0); // empty string
++upto;
}
}
t.device()->seek(2);
for (int j = 0; j < hTableSize; j++)
t << hTable[j];
delete [] hTable;
if (upto > 131072) {
qWarning("Releaser::squeeze: Too many contexts");
m_contextArray.clear();
}
}
}
void Releaser::insertInternal(const TranslatorMessage &message, bool forceComment, bool isUtf8)
{
ByteTranslatorMessage bmsg(originalBytes(message.context(), isUtf8),
originalBytes(message.sourceText(), isUtf8),
originalBytes(message.comment(), isUtf8),
message.translations());
if (!forceComment) {
ByteTranslatorMessage bmsg2(
bmsg.context(), bmsg.sourceText(), QByteArray(""), bmsg.translations());
if (!m_messages.contains(bmsg2)) {
m_messages.insert(bmsg2, 0);
return;
}
}
m_messages.insert(bmsg, 0);
}
void Releaser::insert(const TranslatorMessage &message, bool forceComment)
{
insertInternal(message, forceComment, message.isUtf8());
if (message.isUtf8() && message.isNonUtf8())
insertInternal(message, forceComment, false);
}
void Releaser::setNumerusRules(const QByteArray &rules)
{
m_numerusRules = rules;
}
static quint8 read8(const uchar *data)
{
return *data;
}
static quint32 read32(const uchar *data)
{
return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | (data[3]);
}
static void fromBytes(const char *str, int len, QTextCodec *codec, QTextCodec *utf8Codec,
QString *out, QString *utf8Out,
bool *isSystem, bool *isUtf8, bool *needs8Bit)
{
for (int i = 0; i < len; ++i)
if (str[i] & 0x80) {
if (utf8Codec) {
QTextCodec::ConverterState cvtState;
*utf8Out = utf8Codec->toUnicode(str, len, &cvtState);
*isUtf8 = !cvtState.invalidChars;
}
QTextCodec::ConverterState cvtState;
*out = codec->toUnicode(str, len, &cvtState);
*isSystem = !cvtState.invalidChars;
*needs8Bit = true;
return;
}
*out = QString::fromLatin1(str, len);
*isSystem = true;
if (utf8Codec) {
*utf8Out = *out;
*isUtf8 = true;
}
*needs8Bit = false;
}
bool loadQM(Translator &translator, QIODevice &dev, ConversionData &cd)
{
QByteArray ba = dev.readAll();
const uchar *data = (uchar*)ba.data();
int len = ba.size();
if (len < MagicLength || memcmp(data, magic, MagicLength) != 0) {
cd.appendError(QLatin1String("QM-Format error: magic marker missing"));
return false;
}
enum { Contexts = 0x2f, Hashes = 0x42, Messages = 0x69, NumerusRules = 0x88 };
// for squeezed but non-file data, this is what needs to be deleted
const uchar *messageArray = 0;
const uchar *offsetArray = 0;
const uchar *contextArray = 0;
const uchar *numerusRulesArray = 0;
uint messageLength = 0;
uint offsetLength = 0;
uint contextLength = 0;
uint numerusRulesLength = 0;
bool ok = true;
const uchar *end = data + len;
data += MagicLength;
while (data < end - 4) {
quint8 tag = read8(data++);
quint32 blockLen = read32(data);
//qDebug() << "TAG:" << tag << "BLOCKLEN:" << blockLen;
data += 4;
if (!tag || !blockLen)
break;
if (data + blockLen > end) {
ok = false;
break;
}
if (tag == Contexts) {
contextArray = data;
contextLength = blockLen;
//qDebug() << "CONTEXTS: " << contextLength << QByteArray((const char *)contextArray, contextLength).toHex();
} else if (tag == Hashes) {
offsetArray = data;
offsetLength = blockLen;
//qDebug() << "HASHES: " << offsetLength << QByteArray((const char *)offsetArray, offsetLength).toHex();
} else if (tag == Messages) {
messageArray = data;
messageLength = blockLen;
//qDebug() << "MESSAGES: " << messageLength << QByteArray((const char *)messageArray, messageLength).toHex();
} else if (tag == NumerusRules) {
numerusRulesArray = data;
numerusRulesLength = blockLen;
//qDebug() << "NUMERUSRULES: " << numerusRulesLength << QByteArray((const char *)numerusRulesArray, numerusRulesLength).toHex();
}
data += blockLen;
}
size_t numItems = offsetLength / (2 * sizeof(quint32));
//qDebug() << "NUMITEMS: " << numItems;
QTextCodec *codec = QTextCodec::codecForName(
cd.m_codecForSource.isEmpty() ? QByteArray("Latin1") : cd.m_codecForSource);
QTextCodec *utf8Codec = 0;
if (codec->name() != "UTF-8")
utf8Codec = QTextCodec::codecForName("UTF-8");
QString strProN = QLatin1String("%n");
QLocale::Language l;
QLocale::Country c;
Translator::languageAndCountry(translator.languageCode(), &l, &c);
QStringList numerusForms;
bool guessPlurals = true;
if (getNumerusInfo(l, c, 0, &numerusForms))
guessPlurals = (numerusForms.count() == 1);
QString context, contextUtf8;
bool contextIsSystem, contextIsUtf8, contextNeeds8Bit;
QString sourcetext, sourcetextUtf8;
bool sourcetextIsSystem, sourcetextIsUtf8, sourcetextNeeds8Bit;
QString comment, commentUtf8;
bool commentIsSystem, commentIsUtf8, commentNeeds8Bit;
QStringList translations;
for (const uchar *start = offsetArray; start != offsetArray + (numItems << 3); start += 8) {
//quint32 hash = read32(start);
quint32 ro = read32(start + 4);
//qDebug() << "\nHASH:" << hash;
const uchar *m = messageArray + ro;
for (;;) {
uchar tag = read8(m++);
//qDebug() << "Tag:" << tag << " ADDR: " << m;
switch(tag) {
case Tag_End:
goto end;
case Tag_Translation: {
int len = read32(m);
if (len % 1) {
cd.appendError(QLatin1String("QM-Format error"));
return false;
}
m += 4;
QString str = QString::fromUtf16((const ushort *)m, len/2);
if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) {
for (int i = 0; i < str.length(); ++i)
str[i] = QChar((str.at(i).unicode() >> 8) +
((str.at(i).unicode() << 8) & 0xff00));
}
str.replace(QChar(Translator::InternalVariantSeparator),
QChar(Translator::DefaultVariantSeparator));
translations << str;
m += len;
break;
}
case Tag_Obsolete1:
m += 4;
//qDebug() << "OBSOLETE";
break;
case Tag_SourceText: {
quint32 len = read32(m);
m += 4;
//qDebug() << "SOURCE LEN: " << len;
//qDebug() << "SOURCE: " << QByteArray((const char*)m, len);
fromBytes((const char*)m, len, codec, utf8Codec,
&sourcetext, &sourcetextUtf8,
&sourcetextIsSystem, &sourcetextIsUtf8, &sourcetextNeeds8Bit);
m += len;
break;
}
case Tag_Context: {
quint32 len = read32(m);
m += 4;
//qDebug() << "CONTEXT LEN: " << len;
//qDebug() << "CONTEXT: " << QByteArray((const char*)m, len);
fromBytes((const char*)m, len, codec, utf8Codec,
&context, &contextUtf8,
&contextIsSystem, &contextIsUtf8, &contextNeeds8Bit);
m += len;
break;
}
case Tag_Comment: {
quint32 len = read32(m);
m += 4;
//qDebug() << "COMMENT LEN: " << len;
//qDebug() << "COMMENT: " << QByteArray((const char*)m, len);
fromBytes((const char*)m, len, codec, utf8Codec,
&comment, &commentUtf8,
&commentIsSystem, &commentIsUtf8, &commentNeeds8Bit);
m += len;
break;
}
default:
//qDebug() << "UNKNOWN TAG" << tag;
break;
}
}
end:;
TranslatorMessage msg;
msg.setType(TranslatorMessage::Finished);
if (translations.count() > 1) {
// If guessPlurals is not false here, plural form discard messages
// will be spewn out later.
msg.setPlural(true);
} else if (guessPlurals) {
// This might cause false positives, so it is a fallback only.
if (sourcetext.contains(strProN))
msg.setPlural(true);
}
msg.setTranslations(translations);
translations.clear();
if (contextNeeds8Bit || sourcetextNeeds8Bit || commentNeeds8Bit) {
if (utf8Codec && contextIsUtf8 && sourcetextIsUtf8 && commentIsUtf8) {
// The message is utf-8, but file is not.
msg.setUtf8(true);
msg.setContext(contextUtf8);
msg.setSourceText(sourcetextUtf8);
msg.setComment(commentUtf8);
translator.append(msg);
continue;
}
if (!(contextIsSystem && sourcetextIsSystem && commentIsSystem)) {
cd.appendError(QLatin1String(
"Cannot read file with specified input codec"));
return false;
}
// The message is 8-bit in the file's encoding (utf-8 or not).
}
msg.setContext(context);
msg.setSourceText(sourcetext);
msg.setComment(comment);
translator.append(msg);
}
return ok;
}
static bool saveQM(const Translator &translator, QIODevice &dev, ConversionData &cd)
{
Releaser releaser;
QLocale::Language l;
QLocale::Country c;
Translator::languageAndCountry(translator.languageCode(), &l, &c);
QByteArray rules;
if (getNumerusInfo(l, c, &rules, 0))
releaser.setNumerusRules(rules);
releaser.setCodecName(translator.codecName());
int finished = 0;
int unfinished = 0;
int untranslated = 0;
for (int i = 0; i != translator.messageCount(); ++i) {
const TranslatorMessage &msg = translator.message(i);
TranslatorMessage::Type typ = msg.type();
if (typ != TranslatorMessage::Obsolete) {
if (typ == TranslatorMessage::Unfinished) {
if (msg.translation().isEmpty()) {
++untranslated;
continue;
} else {
if (cd.ignoreUnfinished())
continue;
++unfinished;
}
} else {
++finished;
}
// Drop the comment in (context, sourceText, comment),
// unless the context is empty,
// unless (context, sourceText, "") already exists or
// unless we already dropped the comment of (context,
// sourceText, comment0).
bool forceComment =
msg.comment().isEmpty()
|| msg.context().isEmpty()
|| translator.contains(msg.context(), msg.sourceText(), QString());
releaser.insert(msg, forceComment);
}
}
releaser.squeeze(cd.m_saveMode);
bool saved = releaser.save(&dev);
if (saved && cd.isVerbose()) {
int generatedCount = finished + unfinished;
cd.appendError(QCoreApplication::translate("LRelease",
" Generated %n translation(s) (%1 finished and %2 unfinished)\n", 0,
QCoreApplication::CodecForTr, generatedCount).arg(finished).arg(unfinished));
if (untranslated)
cd.appendError(QCoreApplication::translate("LRelease",
" Ignored %n untranslated source text(s)\n", 0,
QCoreApplication::CodecForTr, untranslated));
}
return saved;
}
int initQM()
{
Translator::FileFormat format;
format.extension = QLatin1String("qm");
format.description = QObject::tr("Compiled Qt translations");
format.fileType = Translator::FileFormat::TranslationBinary;
format.priority = 0;
format.loader = &loadQM;
format.saver = &saveQM;
Translator::registerFileFormat(format);
return 1;
}
Q_CONSTRUCTOR_FUNCTION(initQM)
QT_END_NAMESPACE
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