File indexing completed on 2024-04-21 16:06:18

 /*  -*- c++ -*-
     kmime_headers.cpp
 
     KMime, the KDE Internet mail/usenet news message library.
     SPDX-FileCopyrightText: 2001-2002 the KMime authors.
     See file AUTHORS for details
     SPDX-FileCopyrightText: 2006 Volker Krause <vkrause@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 /**
   @file
   This file is part of the API for handling @ref MIME data and
   defines the various header classes:
    - header's base class defining the common interface
    - generic base classes for different types of fields
    - incompatible, Structured-based field classes
    - compatible, Unstructured-based field classes
 
   @brief
   Defines the various headers classes.
 
   @authors the KMime authors (see AUTHORS file),
   Volker Krause \<vkrause@kde.org\>
 */
 
 #include "kmime_headers.h"
 #include "kmime_headers_p.h"
 
 #include "kmime_util.h"
 #include "kmime_util_p.h"
 #include "kmime_codecs_p.h"
 #include "kmime_content.h"
 #include "kmime_headerfactory_p.h"
 #include "kmime_debug.h"
 #include "kmime_warning_p.h"
 
 #include <KCodecs>
 
 #include <cassert>
 #include <cctype>
 
 // macro to generate a default constructor implementation
 #define kmime_mk_trivial_ctor( subclass, baseclass )                  \
     subclass::subclass() : baseclass()           \
     {                                                                     \
     }                                                                     \
     \
     subclass::~subclass() {}
 
 // end kmime_mk_trivial_ctor
 
 #define kmime_mk_trivial_ctor_with_dptr( subclass, baseclass ) \
     subclass::subclass() : baseclass( new subclass##Private ) \
     {                                                                     \
     }                                                                     \
     \
     subclass::~subclass() { \
         Q_D(subclass); \
         delete d;  /* see comment above the BasePrivate class */ \
         d_ptr = nullptr; \
     }
 
 // end kmime_mk_trivial_ctor_with_dptr
 
 #define kmime_mk_trivial_ctor_with_name( subclass, baseclass, name )  \
     kmime_mk_trivial_ctor( subclass, baseclass )                          \
     \
     const char *subclass::type() const                                    \
     {                                                                     \
         return staticType();                                                \
     }                                                                     \
     const char *subclass::staticType() { return #name; }
 
 #define kmime_mk_trivial_ctor_with_name_and_dptr( subclass, baseclass, name ) \
     kmime_mk_trivial_ctor_with_dptr( subclass, baseclass ) \
     const char *subclass::type() const { return staticType(); } \
     const char *subclass::staticType() { return #name; }
 
 #define kmime_mk_dptr_ctor( subclass, baseclass ) \
     subclass::subclass( subclass##Private *d ) : baseclass( d ) {}
 
 using namespace KMime;
 using namespace KMime::Headers;
 using namespace KMime::Types;
 using namespace KMime::HeaderParsing;
 
 namespace KMime
 {
 namespace Headers
 {
 //-----<Base>----------------------------------
 Base::Base() : d_ptr(new BasePrivate)
 {
 }
 
 Base::Base(BasePrivate *dd) :
     d_ptr(dd)
 {
 }
 
 Base::~Base()
 {
     delete d_ptr;
     d_ptr = nullptr;
 }
 
 void Base::from7BitString(const char *s, size_t len)
 {
     from7BitString(QByteArray::fromRawData(s, len));
 }
 
 QByteArray Base::rfc2047Charset() const
 {
     if (d_ptr->encCS.isEmpty()) {
         return Content::defaultCharset();
     } else {
         return d_ptr->encCS;
     }
 }
 
 void Base::setRFC2047Charset(const QByteArray &cs)
 {
     d_ptr->encCS = cachedCharset(cs);
 }
 
 const char *Base::type() const
 {
     return "";
 }
 
 bool Base::is(const char *t) const
 {
     return qstricmp(t, type()) == 0;
 }
 
 bool Base::isMimeHeader() const
 {
     return qstrnicmp(type(), "Content-", 8) == 0;
 }
 
 QByteArray Base::typeIntro() const
 {
     return QByteArray(type()) + ": ";
 }
 
 //-----</Base>---------------------------------
 
 namespace Generics
 {
 
 //-----<Unstructured>-------------------------
 
 //@cond PRIVATE
 kmime_mk_dptr_ctor(Unstructured, Base)
 //@endcond
 
 Unstructured::Unstructured() : Base(new UnstructuredPrivate)
 {
 }
 
 Unstructured::~Unstructured()
 {
     Q_D(Unstructured);
     delete d;
     d_ptr = nullptr;
 }
 
 void Unstructured::from7BitString(const QByteArray &s)
 {
     Q_D(Unstructured);
     d->decoded = KCodecs::decodeRFC2047String(s, &d->encCS, Content::defaultCharset());
 }
 
 QByteArray Unstructured::as7BitString(bool withHeaderType) const
 {
     const Q_D(Unstructured);
     QByteArray result;
     if (withHeaderType) {
         result = typeIntro();
     }
     result += encodeRFC2047String(d->decoded, d->encCS) ;
 
     return result;
 }
 
 void Unstructured::fromUnicodeString(const QString &s, const QByteArray &b)
 {
     Q_D(Unstructured);
     d->decoded = s;
     d->encCS = cachedCharset(b);
 }
 
 QString Unstructured::asUnicodeString() const
 {
     return d_func()->decoded;
 }
 
 void Unstructured::clear()
 {
     Q_D(Unstructured);
     d->decoded.truncate(0);
 }
 
 bool Unstructured::isEmpty() const
 {
     return d_func()->decoded.isEmpty();
 }
 
 //-----</Unstructured>-------------------------
 
 //-----<Structured>-------------------------
 
 Structured::Structured() : Base(new StructuredPrivate)
 {
 }
 
 kmime_mk_dptr_ctor(Structured, Base)
 
 Structured::~Structured()
 {
     Q_D(Structured);
     delete d;
     d_ptr = nullptr;
 }
 
 
 void Structured::from7BitString(const char *s, size_t len)
 {
     Q_D(Structured);
     if (d->encCS.isEmpty()) {
         d->encCS = Content::defaultCharset();
     }
     parse(s, s + len);
 }
 
 void Structured::from7BitString(const QByteArray &s)
 {
 #if 0
     Q_D(Structured);
     //Bug about mailto with space which are replaced by "_" so it failed to parse
     //=> we reconvert to correct encoding as RFC2047
     const QString str = KCodecs::decodeRFC2047String(s, &d->encCS, Content::defaultCharset());
     const QByteArray ba = KCodecs::encodeRFC2047String(str, d->encCS);
     from7BitString(ba.constData(), ba.length());
 #else
     from7BitString(s.constData(), s.length());
 #endif
 }
 
 QString Structured::asUnicodeString() const
 {
     return QString::fromLatin1(as7BitString(false));
 }
 
 void Structured::fromUnicodeString(const QString &s, const QByteArray &b)
 {
     Q_D(Structured);
     d->encCS = cachedCharset(b);
     from7BitString(s.toLatin1());
 }
 
 //-----</Structured>-------------------------
 
 //-----<Address>-------------------------
 
 Address::Address() : Structured(new AddressPrivate)
 {
 }
 
 kmime_mk_dptr_ctor(Address, Structured)
 
     Address::~Address() = default;
 
 // helper method used in AddressList and MailboxList
 static bool stringToMailbox(const QByteArray &address,
                             const QString &displayName, Types::Mailbox &mbox)
 {
     Types::AddrSpec addrSpec;
     mbox.setName(displayName);
     const char *cursor = address.constData();
     if (!parseAngleAddr(cursor, cursor + address.length(), addrSpec)) {
         if (!parseAddrSpec(cursor, cursor + address.length(), addrSpec)) {
             qCWarning(KMIME_LOG) << "stringToMailbox: Invalid address";
             return false;
         }
     }
     mbox.setAddress(addrSpec);
     return true;
 }
 
 //-----</Address>-------------------------
 
 //-----<MailboxList>-------------------------
 
 kmime_mk_trivial_ctor_with_dptr(MailboxList, Address)
 kmime_mk_dptr_ctor(MailboxList, Address)
 
 QByteArray MailboxList::as7BitString(bool withHeaderType) const
 {
     const Q_D(MailboxList);
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv = typeIntro();
     }
     for (const Types::Mailbox &mbox : std::as_const(d->mailboxList)) {
         rv += mbox.as7BitString(d->encCS);
         rv += ", ";
     }
     rv.resize(rv.length() - 2);
     return rv;
 }
 
 void MailboxList::fromUnicodeString(const QString &s, const QByteArray &b)
 {
     Q_D(MailboxList);
     d->encCS = cachedCharset(b);
     from7BitString(encodeRFC2047Sentence(s, b));
 }
 
 QString MailboxList::asUnicodeString() const
 {
     Q_D(const MailboxList);
     return Mailbox::listToUnicodeString(d->mailboxList);
 }
 
 void MailboxList::clear()
 {
     Q_D(MailboxList);
     d->mailboxList.clear();
 }
 
 bool MailboxList::isEmpty() const
 {
     return d_func()->mailboxList.isEmpty();
 }
 
 void MailboxList::addAddress(const Types::Mailbox &mbox)
 {
     Q_D(MailboxList);
     d->mailboxList.append(mbox);
 }
 
 void MailboxList::addAddress(const QByteArray &address,
                              const QString &displayName)
 {
     Q_D(MailboxList);
     Types::Mailbox mbox;
     if (stringToMailbox(address, displayName, mbox)) {
         d->mailboxList.append(mbox);
     }
 }
 
 QList<QByteArray> MailboxList::addresses() const {
     QList<QByteArray> rv;
     rv.reserve(d_func()->mailboxList.count());
     const auto mailboxList = d_func()->mailboxList;
     for (const Types::Mailbox &mbox : mailboxList) {
         rv.append(mbox.address());
     }
     return rv;
 }
 
 QStringList MailboxList::displayNames() const
 {
     Q_D(const MailboxList);
     QStringList rv;
     rv.reserve(d->mailboxList.count());
     for (const Types::Mailbox &mbox : std::as_const(d->mailboxList)) {
         if (mbox.hasName()) {
             rv.append(mbox.name());
         } else {
             rv.append(QString::fromLatin1(mbox.address()));
         }
     }
     return rv;
 }
 
 QString MailboxList::displayString() const
 {
     Q_D(const MailboxList);
     if (d->mailboxList.size() == 1) { // fast-path to avoid temporary QStringList in the common case of just one From address
         const auto& mbox = d->mailboxList.at(0);
         if (mbox.hasName()) {
             return mbox.name();
         } else {
             return QString::fromLatin1(mbox.address());
         }
     }
     return displayNames().join(QLatin1StringView(", "));
 }
 
 Types::Mailbox::List MailboxList::mailboxes() const
 {
     return d_func()->mailboxList;
 }
 
 bool MailboxList::parse(const char *&scursor, const char *const send,
                         bool isCRLF)
 {
     Q_D(MailboxList);
     // examples:
     // from := "From:" mailbox-list CRLF
     // sender := "Sender:" mailbox CRLF
 
     // parse an address-list:
     QList<Types::Address> maybeAddressList;
     if (!parseAddressList(scursor, send, maybeAddressList, isCRLF)) {
         return false;
     }
 
     d->mailboxList.clear();
     d->mailboxList.reserve(maybeAddressList.count());
 
     // extract the mailboxes and complain if there are groups:
     for (const auto &it : std::as_const(maybeAddressList)) {
         if (!(it).displayName.isEmpty()) {
             KMIME_WARN << "mailbox groups in header disallowing them! Name: \""
                        << (it).displayName << "\""
                        << Qt::endl
                           ;
         }
         d->mailboxList += (it).mailboxList;
     }
     return true;
 }
 
 //-----</MailboxList>-------------------------
 
 //-----<SingleMailbox>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(SingleMailbox, MailboxList)
 //@endcond
 
 bool SingleMailbox::parse(const char *&scursor, const char *const send,
                           bool isCRLF)
 {
     Q_D(MailboxList);
     if (!MailboxList::parse(scursor, send, isCRLF)) {
         return false;
     }
 
     if (d->mailboxList.count() > 1) {
         KMIME_WARN << "multiple mailboxes in header allowing only a single one!"
                    << Qt::endl;
     }
     return true;
 }
 
 //-----</SingleMailbox>-------------------------
 
 //-----<AddressList>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(AddressList, Address)
 kmime_mk_dptr_ctor(AddressList, Address)
 //@endcond
 
 QByteArray AddressList::as7BitString(bool withHeaderType) const
 {
     const Q_D(AddressList);
     if (d->addressList.isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv = typeIntro();
     }
     for (const Types::Address &addr : std::as_const(d->addressList)) {
         const auto mailBoxList = addr.mailboxList;
         for (const Types::Mailbox &mbox : mailBoxList) {
             rv += mbox.as7BitString(d->encCS);
             rv += ", ";
         }
     }
     rv.resize(rv.length() - 2);
     return rv;
 }
 
 void AddressList::fromUnicodeString(const QString &s, const QByteArray &b)
 {
     Q_D(AddressList);
     d->encCS = cachedCharset(b);
     from7BitString(encodeRFC2047Sentence(s, b));
 }
 
 QString AddressList::asUnicodeString() const
 {
     Q_D(const AddressList);
     QStringList rv;
     for (const Types::Address &addr : std::as_const(d->addressList)) {
         rv.reserve(rv.size() + addr.mailboxList.size());
         const auto mailboxList = addr.mailboxList;
         for (const Types::Mailbox &mbox : mailboxList) {
             rv.append(mbox.prettyAddress());
         }
     }
     return rv.join(QLatin1StringView(", "));
 }
 
 void AddressList::clear()
 {
     Q_D(AddressList);
     d->addressList.clear();
 }
 
 bool AddressList::isEmpty() const
 {
     return d_func()->addressList.isEmpty();
 }
 
 void AddressList::addAddress(const Types::Mailbox &mbox)
 {
     Q_D(AddressList);
     Types::Address addr;
     addr.mailboxList.append(mbox);
     d->addressList.append(addr);
 }
 
 void AddressList::addAddress(const QByteArray &address,
                              const QString &displayName)
 {
     Q_D(AddressList);
     Types::Address addr;
     Types::Mailbox mbox;
     if (stringToMailbox(address, displayName, mbox)) {
         addr.mailboxList.append(mbox);
         d->addressList.append(addr);
     }
 }
 
 QList<QByteArray> AddressList::addresses() const {
     QList<QByteArray> rv;
     const auto addressList = d_func()->addressList;
     for (const Types::Address &addr : addressList) {
         const auto mailboxList = addr.mailboxList;
         for (const Types::Mailbox &mbox : mailboxList) {
             rv.append(mbox.address());
         }
     }
     return rv;
 }
 
 QStringList AddressList::displayNames() const
 {
     Q_D(const AddressList);
     QStringList rv;
     for (const Types::Address &addr : std::as_const(d->addressList)) {
         const auto mailboxList = addr.mailboxList;
         for (const Types::Mailbox &mbox : mailboxList) {
             if (mbox.hasName()) {
                 rv.append(mbox.name());
             } else {
                 rv.append(QString::fromLatin1(mbox.address()));
             }
         }
     }
     return rv;
 }
 
 QString AddressList::displayString() const
 {
     // optimize for single entry and avoid creation of the QStringList in that case?
     return displayNames().join(QLatin1StringView(", "));
 }
 
 Types::Mailbox::List AddressList::mailboxes() const
 {
     Types::Mailbox::List rv;
     const auto addressList = d_func()->addressList;
     for (const Types::Address &addr : addressList) {
         const auto mailboxList = addr.mailboxList;
         for (const Types::Mailbox &mbox : mailboxList) {
             rv.append(mbox);
         }
     }
     return rv;
 }
 
 bool AddressList::parse(const char *&scursor, const char *const send,
                         bool isCRLF)
 {
     Q_D(AddressList);
     QList<Types::Address> maybeAddressList;
     if (!parseAddressList(scursor, send, maybeAddressList, isCRLF)) {
         return false;
     }
 
     d->addressList = maybeAddressList;
     return true;
 }
 
 //-----</AddressList>-------------------------
 
 //-----<Token>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(Token, Structured)
 kmime_mk_dptr_ctor(Token, Structured)
 //@endcond
 
 QByteArray Token::as7BitString(bool withHeaderType) const
 {
     if (isEmpty()) {
       return {};
     }
     if (withHeaderType) {
         return typeIntro() + d_func()->token;
     }
     return d_func()->token;
 }
 
 void Token::clear()
 {
     Q_D(Token);
     d->token.clear();
 }
 
 bool Token::isEmpty() const
 {
     return d_func()->token.isEmpty();
 }
 
 QByteArray Token::token() const
 {
     return d_func()->token;
 }
 
 void Token::setToken(const QByteArray &t)
 {
     Q_D(Token);
     d->token = t;
 }
 
 bool Token::parse(const char *&scursor, const char *const send, bool isCRLF)
 {
     Q_D(Token);
     clear();
     eatCFWS(scursor, send, isCRLF);
     // must not be empty:
     if (scursor == send) {
         return false;
     }
 
     QPair<const char *, int> maybeToken;
     if (!parseToken(scursor, send, maybeToken, ParseTokenNoFlag)) {
         return false;
     }
     d->token = QByteArray(maybeToken.first, maybeToken.second);
 
     // complain if trailing garbage is found:
     eatCFWS(scursor, send, isCRLF);
     if (scursor != send) {
         KMIME_WARN << "trailing garbage after token in header allowing "
                    "only a single token!"
                    << Qt::endl;
     }
     return true;
 }
 
 //-----</Token>-------------------------
 
 //-----<PhraseList>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(PhraseList, Structured)
 //@endcond
 
 QByteArray PhraseList::as7BitString(bool withHeaderType) const
 {
     const Q_D(PhraseList);
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv = typeIntro();
     }
 
     for (int i = 0; i < d->phraseList.count(); ++i) {
         // FIXME: only encode when needed, quote when needed, etc.
         rv += encodeRFC2047String(d->phraseList[i], d->encCS, false);
         if (i != d->phraseList.count() - 1) {
             rv += ", ";
         }
     }
 
     return rv;
 }
 
 QString PhraseList::asUnicodeString() const
 {
   return d_func()->phraseList.join(QLatin1StringView(", "));
 }
 
 void PhraseList::clear()
 {
     Q_D(PhraseList);
     d->phraseList.clear();
 }
 
 bool PhraseList::isEmpty() const
 {
     return d_func()->phraseList.isEmpty();
 }
 
 QStringList PhraseList::phrases() const
 {
     return d_func()->phraseList;
 }
 
 bool PhraseList::parse(const char *&scursor, const char *const send,
                        bool isCRLF)
 {
     Q_D(PhraseList);
     d->phraseList.clear();
 
     while (scursor != send) {
         eatCFWS(scursor, send, isCRLF);
         // empty entry ending the list: OK.
         if (scursor == send) {
             return true;
         }
         // empty entry: ignore.
         if (*scursor == ',') {
             scursor++;
             continue;
         }
 
         QString maybePhrase;
         if (!parsePhrase(scursor, send, maybePhrase, isCRLF)) {
             return false;
         }
         d->phraseList.append(maybePhrase);
 
         eatCFWS(scursor, send, isCRLF);
         // non-empty entry ending the list: OK.
         if (scursor == send) {
             return true;
         }
         // comma separating the phrases: eat.
         if (*scursor == ',') {
             scursor++;
         }
     }
     return true;
 }
 
 //-----</PhraseList>-------------------------
 
 //-----<DotAtom>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(DotAtom, Structured)
 //@endcond
 
 QByteArray DotAtom::as7BitString(bool withHeaderType) const
 {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     rv += d_func()->dotAtom;
     return rv;
 }
 
 QString DotAtom::asUnicodeString() const
 {
     return QString::fromLatin1(d_func()->dotAtom);
 }
 
 void DotAtom::clear()
 {
     Q_D(DotAtom);
     d->dotAtom.clear();
 }
 
 bool DotAtom::isEmpty() const
 {
     return d_func()->dotAtom.isEmpty();
 }
 
 bool DotAtom::parse(const char *&scursor, const char *const send,
                     bool isCRLF)
 {
     Q_D(DotAtom);
     QByteArray maybeDotAtom;
     if (!parseDotAtom(scursor, send, maybeDotAtom, isCRLF)) {
         return false;
     }
 
     d->dotAtom = maybeDotAtom;
 
     eatCFWS(scursor, send, isCRLF);
     if (scursor != send) {
         KMIME_WARN << "trailing garbage after dot-atom in header allowing "
                    "only a single dot-atom!"
                    << Qt::endl;
     }
     return true;
 }
 
 //-----</DotAtom>-------------------------
 
 //-----<Parametrized>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(Parametrized, Structured)
 kmime_mk_dptr_ctor(Parametrized, Structured)
 //@endcond
 
 QByteArray Parametrized::as7BitString(bool withHeaderType) const
 {
     const Q_D(Parametrized);
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     bool first = true;
     for (QMap<QString, QString>::ConstIterator it = d->parameterHash.constBegin();
             it != d->parameterHash.constEnd(); ++it) {
         if (!first) {
             rv += "; ";
         } else {
             first = false;
         }
         if (isUsAscii(it.value())) {
             rv += it.key().toLatin1() + '=';
             QByteArray tmp = it.value().toLatin1();
             addQuotes(tmp, true);   // force quoting, eg. for whitespaces in parameter value
             rv += tmp;
         } else {
             rv += it.key().toLatin1() + "*=";
             rv += encodeRFC2231String(it.value(), d->encCS);
         }
     }
 
     return rv;
 }
 
 QString Parametrized::parameter(const QString &key) const
 {
     return d_func()->parameterHash.value(key.toLower());
 }
 
 bool Parametrized::hasParameter(const QString &key) const
 {
     return d_func()->parameterHash.contains(key.toLower());
 }
 
 void Parametrized::setParameter(const QString &key, const QString &value)
 {
     Q_D(Parametrized);
     d->parameterHash.insert(key.toLower(), value);
 }
 
 bool Parametrized::isEmpty() const
 {
     return d_func()->parameterHash.isEmpty();
 }
 
 void Parametrized::clear()
 {
     Q_D(Parametrized);
     d->parameterHash.clear();
 }
 
 bool Parametrized::parse(const char  *&scursor, const char *const send,
                          bool isCRLF)
 {
     Q_D(Parametrized);
     d->parameterHash.clear();
     QByteArray charset;
     if (!parseParameterListWithCharset(scursor, send, d->parameterHash, charset, isCRLF)) {
         return false;
     }
     d->encCS = charset;
     return true;
 }
 
 //-----</Parametrized>-------------------------
 
 //-----<Ident>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(Ident, Address)
 kmime_mk_dptr_ctor(Ident, Address)
 //@endcond
 
 QByteArray Ident::as7BitString(bool withHeaderType) const
 {
     const Q_D(Ident);
     if (d->msgIdList.isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv = typeIntro();
     }
     for (const Types::AddrSpec &addr : std::as_const(d->msgIdList)) {
         if (!addr.isEmpty()) {
             const QString asString = addr.asString();
             rv += '<';
             if (!asString.isEmpty()) {
                 rv += asString.toLatin1(); // FIXME: change parsing to use QByteArrays
             }
             rv += "> ";
         }
     }
     if (!rv.isEmpty()) {
         rv.resize(rv.length() - 1);
     }
     return rv;
 }
 
 void Ident::clear()
 {
     Q_D(Ident);
     d->msgIdList.clear();
     d->cachedIdentifier.clear();
 }
 
 bool Ident::isEmpty() const
 {
     return d_func()->msgIdList.isEmpty();
 }
 
 bool Ident::parse(const char *&scursor, const char *const send, bool isCRLF)
 {
     Q_D(Ident);
     // msg-id   := "<" id-left "@" id-right ">"
     // id-left  := dot-atom-text / no-fold-quote / local-part
     // id-right := dot-atom-text / no-fold-literal / domain
     //
     // equivalent to:
     // msg-id   := angle-addr
 
     d->msgIdList.clear();
     d->cachedIdentifier.clear();
 
     while (scursor != send) {
         eatCFWS(scursor, send, isCRLF);
         // empty entry ending the list: OK.
         if (scursor == send) {
             return true;
         }
         // empty entry: ignore.
         if (*scursor == ',') {
             scursor++;
             continue;
         }
 
         AddrSpec maybeMsgId;
         if (!parseAngleAddr(scursor, send, maybeMsgId, isCRLF)) {
             return false;
         }
         d->msgIdList.append(maybeMsgId);
 
         eatCFWS(scursor, send, isCRLF);
         // header end ending the list: OK.
         if (scursor == send) {
             return true;
         }
         // regular item separator: eat it.
         if (*scursor == ',') {
             scursor++;
         }
     }
     return true;
 }
 
 QList<QByteArray> Ident::identifiers() const {
     QList<QByteArray> rv;
     const auto msgIdList = d_func()->msgIdList;
     for (const Types::AddrSpec &addr : msgIdList) {
         if (!addr.isEmpty()) {
             const QString asString = addr.asString();
             if (!asString.isEmpty()) {
                 rv.append(asString.toLatin1());   // FIXME: change parsing to use QByteArrays
             }
         }
     }
     return rv;
 }
 
 void Ident::fromIdent(const Ident* ident)
 {
     d_func()->encCS = ident->d_func()->encCS;
     d_func()->msgIdList = ident->d_func()->msgIdList;
     d_func()->cachedIdentifier = ident->d_func()->cachedIdentifier;
 }
 
 void Ident::appendIdentifier(const QByteArray &id)
 {
     Q_D(Ident);
     QByteArray tmp = id;
     if (!tmp.startsWith('<')) {
         tmp.prepend('<');
     }
     if (!tmp.endsWith('>')) {
         tmp.append('>');
     }
     AddrSpec msgId;
     const char *cursor = tmp.constData();
     if (parseAngleAddr(cursor, cursor + tmp.length(), msgId)) {
         d->msgIdList.append(msgId);
     } else {
         qCWarning(KMIME_LOG) << "Unable to parse address spec!";
     }
 }
 
 //-----</Ident>-------------------------
 
 //-----<SingleIdent>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_dptr(SingleIdent, Ident)
 kmime_mk_dptr_ctor(SingleIdent, Ident)
 //@endcond
 
 QByteArray SingleIdent::identifier() const
 {
     if (d_func()->msgIdList.isEmpty()) {
       return {};
     }
 
     if (d_func()->cachedIdentifier.isEmpty()) {
         const Types::AddrSpec &addr = d_func()->msgIdList.first();
         if (!addr.isEmpty()) {
             const QString asString = addr.asString();
             if (!asString.isEmpty()) {
                 d_func()->cachedIdentifier = asString.toLatin1();// FIXME: change parsing to use QByteArrays
             }
         }
     }
 
     return d_func()->cachedIdentifier;
 }
 
 void SingleIdent::setIdentifier(const QByteArray &id)
 {
     Q_D(SingleIdent);
     d->msgIdList.clear();
     d->cachedIdentifier.clear();
     appendIdentifier(id);
 }
 
 bool SingleIdent::parse(const char *&scursor, const char *const send,
                         bool isCRLF)
 {
     Q_D(SingleIdent);
     if (!Ident::parse(scursor, send, isCRLF)) {
         return false;
     }
 
     if (d->msgIdList.count() > 1) {
         KMIME_WARN << "more than one msg-id in header "
                    << "allowing only a single one!"
                    << Qt::endl;
     }
     return true;
 }
 
 //-----</SingleIdent>-------------------------
 
 } // namespace Generics
 
 //-----<ReturnPath>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(ReturnPath, Generics::Address, Return-Path)
 //@endcond
 
 QByteArray ReturnPath::as7BitString(bool withHeaderType) const
 {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
     rv += '<' + d_func()->mailbox.as7BitString(d_func()->encCS) + '>';
     return rv;
 }
 
 void ReturnPath::clear()
 {
     Q_D(ReturnPath);
     d->mailbox.setAddress(Types::AddrSpec());
     d->mailbox.setName(QString());
 }
 
 bool ReturnPath::isEmpty() const
 {
     const Q_D(ReturnPath);
     return !d->mailbox.hasAddress() && !d->mailbox.hasName();
 }
 
 bool ReturnPath::parse(const char *&scursor, const char *const send,
                        bool isCRLF)
 {
     Q_D(ReturnPath);
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return false;
     }
 
     const char *oldscursor = scursor;
 
     Mailbox maybeMailbox;
     if (!parseMailbox(scursor, send, maybeMailbox, isCRLF)) {
         // mailbox parsing failed, but check for empty brackets:
         scursor = oldscursor;
         if (*scursor != '<') {
             return false;
         }
         scursor++;
         eatCFWS(scursor, send, isCRLF);
         if (scursor == send || *scursor != '>') {
             return false;
         }
         scursor++;
 
         // prepare a Null mailbox:
         AddrSpec emptyAddrSpec;
         maybeMailbox.setName(QString());
         maybeMailbox.setAddress(emptyAddrSpec);
     } else {
         // check that there was no display-name:
         if (maybeMailbox.hasName()) {
             KMIME_WARN << "display-name \"" << maybeMailbox.name()
                        << "\" in Return-Path!" << Qt::endl;
         }
     }
     d->mailbox = maybeMailbox;
 
     // see if that was all:
     eatCFWS(scursor, send, isCRLF);
     // and warn if it wasn't:
     if (scursor != send) {
         KMIME_WARN << "trailing garbage after angle-addr in Return-Path!"
                    << Qt::endl;
     }
     return true;
 }
 
 //-----</ReturnPath>-------------------------
 
 //-----<Generic>-------------------------------
 
 // NOTE: Do *not* register Generic with HeaderFactory, since its type() is changeable.
 
 Generic::Generic() : Generics::Unstructured(new GenericPrivate)
 {
 }
 
 Generic::Generic(const char *t, int len) : Generics::Unstructured(new GenericPrivate)
 {
     setType(t, len);
 }
 
 Generic::~Generic()
 {
     Q_D(Generic);
     delete d;
     d_ptr = nullptr;
 }
 
 void Generic::clear()
 {
     Q_D(Generic);
     delete[] d->type;
     d->type = nullptr;
     Unstructured::clear();
 }
 
 bool Generic::isEmpty() const
 {
     return d_func()->type == nullptr || Unstructured::isEmpty();
 }
 
 const char *Generic::type() const
 {
     return d_func()->type;
 }
 
 void Generic::setType(const char *type, int len)
 {
     Q_D(Generic);
     if (d->type) {
         delete[] d->type;
     }
     if (type) {
         const int l = (len < 0 ? strlen(type) : len) + 1;
         d->type = new char[l];
         qstrncpy(d->type, type, l);
     } else {
         d->type = nullptr;
     }
 }
 
 //-----<Generic>-------------------------------
 
 //-----<MessageID>-----------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name(MessageID, Generics::SingleIdent, Message-ID)
 //@endcond
 
 void MessageID::generate(const QByteArray &fqdn)
 {
     setIdentifier('<' + uniqueString() + '@' + fqdn + '>');
 }
 
 //-----</MessageID>----------------------------
 
 //-----<Control>-------------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(Control, Generics::Structured, Control)
 //@endcond
 
 QByteArray Control::as7BitString(bool withHeaderType) const
 {
     const Q_D(Control);
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     rv += d->name;
     if (!d->parameter.isEmpty()) {
         rv += ' ' + d->parameter;
     }
     return rv;
 }
 
 void Control::clear()
 {
     Q_D(Control);
     d->name.clear();
     d->parameter.clear();
 }
 
 bool Control::isEmpty() const
 {
     return d_func()->name.isEmpty();
 }
 
 QByteArray Control::controlType() const
 {
     return d_func()->name;
 }
 
 QByteArray Control::parameter() const
 {
     return d_func()->parameter;
 }
 
 bool Control::isCancel() const
 {
     return d_func()->name.toLower() == "cancel";
 }
 
 void Control::setCancel(const QByteArray &msgid)
 {
     Q_D(Control);
     d->name = "cancel";
     d->parameter = msgid;
 }
 
 bool Control::parse(const char *&scursor, const char *const send, bool isCRLF)
 {
     Q_D(Control);
     clear();
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return false;
     }
     const char *start = scursor;
     while (scursor != send && !isspace(*scursor)) {
         ++scursor;
     }
     d->name = QByteArray(start, scursor - start);
     eatCFWS(scursor, send, isCRLF);
     d->parameter = QByteArray(scursor, send - scursor);
     return true;
 }
 
 //-----</Control>------------------------------
 
 //-----<MailCopiesTo>--------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(MailCopiesTo,
         Generics::AddressList, Mail-Copies-To)
 //@endcond
 
 QByteArray MailCopiesTo::as7BitString(bool withHeaderType) const
 {
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
     if (!AddressList::isEmpty()) {
         rv += AddressList::as7BitString(false);
     } else {
         if (d_func()->alwaysCopy) {
             rv += "poster";
         } else if (d_func()->neverCopy) {
             rv += "nobody";
         }
     }
     return rv;
 }
 
 QString MailCopiesTo::asUnicodeString() const
 {
     if (!AddressList::isEmpty()) {
         return AddressList::asUnicodeString();
     }
     if (d_func()->alwaysCopy) {
         return QStringLiteral("poster");
     }
     if (d_func()->neverCopy) {
         return QStringLiteral("nobody");
     }
     return {};
 }
 
 void MailCopiesTo::clear()
 {
     Q_D(MailCopiesTo);
     AddressList::clear();
     d->alwaysCopy = false;
     d->neverCopy = false;
 }
 
 bool MailCopiesTo::isEmpty() const
 {
     return AddressList::isEmpty() && !(d_func()->alwaysCopy || d_func()->neverCopy);
 }
 
 bool MailCopiesTo::alwaysCopy() const
 {
     return !AddressList::isEmpty() || d_func()->alwaysCopy;
 }
 
 void MailCopiesTo::setAlwaysCopy()
 {
     Q_D(MailCopiesTo);
     clear();
     d->alwaysCopy = true;
 }
 
 bool MailCopiesTo::neverCopy() const
 {
     return d_func()->neverCopy;
 }
 
 void MailCopiesTo::setNeverCopy()
 {
     Q_D(MailCopiesTo);
     clear();
     d->neverCopy = true;
 }
 
 bool MailCopiesTo::parse(const char  *&scursor, const char *const send,
                          bool isCRLF)
 {
     Q_D(MailCopiesTo);
     clear();
     if (send - scursor == 5) {
         if (qstrnicmp("never", scursor, 5) == 0) {
             d->neverCopy = true;
             return true;
         }
     }
     if (send - scursor == 6) {
         if (qstrnicmp("always", scursor, 6) == 0 || qstrnicmp("poster", scursor, 6) == 0) {
             d->alwaysCopy = true;
             return true;
         }
         if (qstrnicmp("nobody", scursor, 6) == 0) {
             d->neverCopy = true;
             return true;
         }
     }
     return AddressList::parse(scursor, send, isCRLF);
 }
 
 //-----</MailCopiesTo>-------------------------
 
 //-----<Date>----------------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(Date, Generics::Structured, Date)
 //@endcond
 
 QByteArray Date::as7BitString(bool withHeaderType) const
 {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
     //QT5 fix port to QDateTime Qt::RFC2822Date is not enough we need to fix it. We need to use QLocale("C") + add "ddd, ";
     //rv += d_func()->dateTime.toString(  Qt::RFC2822Date ).toLatin1();
     rv += QLocale::c().toString(d_func()->dateTime, QStringLiteral("ddd, ")).toLatin1();
     rv += d_func()->dateTime.toString(Qt::RFC2822Date).toLatin1();
 
     return rv;
 }
 
 void Date::clear() {
     Q_D(Date);
     d->dateTime = QDateTime();
 }
 
 bool Date::isEmpty() const {
     return d_func()->dateTime.isNull() || !d_func()->dateTime.isValid();
 }
 
 QDateTime Date::dateTime() const {
     return d_func()->dateTime;
 }
 
 void Date::setDateTime(const QDateTime & dt) {
     Q_D(Date);
     d->dateTime = dt;
 }
 
 int Date::ageInDays() const {
     const QDate today = QDate::currentDate();
     return dateTime().date().daysTo(today);
 }
 
 bool Date::parse(const char *&scursor, const char *const send, bool isCRLF) {
     Q_D(Date);
     const char *start = scursor;
     bool result = parseDateTime(scursor, send, d->dateTime, isCRLF);
     if (!result) {
         result = parseQDateTime(start, send, d->dateTime, isCRLF);
     }
     return result;
 }
 
 //-----</Date>---------------------------------
 
 //-----<Newsgroups>----------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(Newsgroups, Generics::Structured, Newsgroups)
 kmime_mk_trivial_ctor_with_name(FollowUpTo, Newsgroups, Followup-To)
 //@endcond
 
 QByteArray Newsgroups::as7BitString(bool withHeaderType) const {
     const Q_D(Newsgroups);
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     for (int i = 0; i < d->groups.count(); ++i) {
         rv += d->groups[ i ];
         if (i != d->groups.count() - 1) {
             rv += ',';
         }
     }
     return rv;
 }
 
 void Newsgroups::fromUnicodeString(const QString & s, const QByteArray & b) {
     Q_UNUSED(b)
     Q_D(Newsgroups);
     from7BitString(s.toUtf8());
     d->encCS = cachedCharset("UTF-8");
 }
 
 QString Newsgroups::asUnicodeString() const {
     return QString::fromUtf8(as7BitString(false));
 }
 
 void Newsgroups::clear() {
     Q_D(Newsgroups);
     d->groups.clear();
 }
 
 bool Newsgroups::isEmpty() const {
     return d_func()->groups.isEmpty();
 }
 
 QList<QByteArray> Newsgroups::groups() const { return d_func()->groups; }
 
 void Newsgroups::setGroups(const QList<QByteArray> &groups) {
     Q_D(Newsgroups);
     d->groups = groups;
 }
 
 bool Newsgroups::isCrossposted() const {
     return d_func()->groups.count() >= 2;
 }
 
 bool Newsgroups::parse(const char *&scursor, const char *const send, bool isCRLF) {
     Q_D(Newsgroups);
     clear();
     while (true) {
       eatCFWS(scursor, send, isCRLF);
       if (scursor != send && *scursor == ',') {
         ++scursor;
       }
       eatCFWS(scursor, send, isCRLF);
       if (scursor == send) {
         return true;
       }
       const char *start = scursor;
       while (scursor != send && !isspace(*scursor) && *scursor != ',') {
         ++scursor;
       }
       QByteArray group(start, scursor - start);
       d->groups.append(group);
     }
     return true;
 }
 
 //-----</Newsgroups>---------------------------
 
 //-----<Lines>---------------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(Lines, Generics::Structured, Lines)
 //@endcond
 
 QByteArray Lines::as7BitString(bool withHeaderType) const {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray num;
     num.setNum(d_func()->lines);
 
     if (withHeaderType) {
         return typeIntro() + num;
     }
     return num;
 }
 
 QString Lines::asUnicodeString() const {
     if (isEmpty()) {
       return {};
     }
     return QString::number(d_func()->lines);
 }
 
 void Lines::clear() {
     Q_D(Lines);
     d->lines = -1;
 }
 
 bool Lines::isEmpty() const {
     return d_func()->lines == -1;
 }
 
 int Lines::numberOfLines() const {
     return d_func()->lines;
 }
 
 void Lines::setNumberOfLines(int lines) {
     Q_D(Lines);
     d->lines = lines;
 }
 
 bool Lines::parse(const char *&scursor, const char *const send, bool isCRLF) {
     Q_D(Lines);
     eatCFWS(scursor, send, isCRLF);
     if (parseDigits(scursor, send, d->lines)  == 0) {
         clear();
         return false;
     }
     return true;
 }
 
 //-----</Lines>--------------------------------
 
 //-----<Content-Type>--------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(ContentType, Generics::Parametrized,
             Content-Type)
 //@endcond
 
 bool ContentType::isEmpty() const {
     return d_func()->mimeType.isEmpty();
 }
 
 void ContentType::clear() {
     Q_D(ContentType);
     d->mimeType.clear();
     Parametrized::clear();
 }
 
 QByteArray ContentType::as7BitString(bool withHeaderType) const {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     rv += mimeType();
     if (!Parametrized::isEmpty()) {
         rv += "; " + Parametrized::as7BitString(false);
     }
 
     return rv;
 }
 
 QByteArray ContentType::mimeType() const {
     Q_D(const ContentType);
     return d->mimeType;
 }
 
 QByteArray ContentType::mediaType() const {
     Q_D(const ContentType);
     const int pos = d->mimeType.indexOf('/');
     if (pos < 0) {
         return d->mimeType;
     } else {
         return d->mimeType.left(pos);
     }
 }
 
 QByteArray ContentType::subType() const {
     Q_D(const ContentType);
     const int pos = d->mimeType.indexOf('/');
     if (pos < 0) {
       return {};
     } else {
         return d->mimeType.mid(pos + 1);
     }
 }
 
 void ContentType::setMimeType(const QByteArray & mimeType) {
     Q_D(ContentType);
     d->mimeType = mimeType;
 }
 
 bool ContentType::isMediatype(const char *mediatype) const {
     Q_D(const ContentType);
     const int len = strlen(mediatype);
     return qstrnicmp(d->mimeType.constData(), mediatype, len) == 0 &&
             (d->mimeType.at(len) == '/' || d->mimeType.size() == len);
 }
 
 bool ContentType::isSubtype(const char *subtype) const {
     Q_D(const ContentType);
     const int pos = d->mimeType.indexOf('/');
     if (pos < 0) {
         return false;
     }
     const int len = strlen(subtype);
     return qstrnicmp(d->mimeType.constData() + pos + 1, subtype, len) == 0 &&
             d->mimeType.size() == pos + len + 1;
 }
 
 bool ContentType::isMimeType(const char* mimeType) const
 {
     Q_D(const ContentType);
     return qstricmp(d->mimeType.constData(), mimeType) == 0;
 }
 
 bool ContentType::isText() const {
     return (isMediatype("text") || isEmpty());
 }
 
 bool ContentType::isPlainText() const {
     return (qstricmp(d_func()->mimeType.constData(), "text/plain") == 0 || isEmpty());
 }
 
 bool ContentType::isHTMLText() const {
     return qstricmp(d_func()->mimeType.constData(), "text/html") == 0;
 }
 
 bool ContentType::isImage() const {
     return isMediatype("image");
 }
 
 bool ContentType::isMultipart() const {
     return isMediatype("multipart");
 }
 
 bool ContentType::isPartial() const {
     return qstricmp(d_func()->mimeType.constData(), "message/partial") == 0;
 }
 
 QByteArray ContentType::charset() const {
     QByteArray ret = parameter(QStringLiteral("charset")).toLatin1();
     if (ret.isEmpty()) {
         //return the default-charset if necessary
         ret = Content::defaultCharset();
     }
     return ret;
 }
 
 void ContentType::setCharset(const QByteArray & s) {
     setParameter(QStringLiteral("charset"), QString::fromLatin1(s));
 }
 
 QByteArray ContentType::boundary() const {
     return parameter(QStringLiteral("boundary")).toLatin1();
 }
 
 void ContentType::setBoundary(const QByteArray & s) {
     setParameter(QStringLiteral("boundary"), QString::fromLatin1(s));
 }
 
 QString ContentType::name() const {
     return parameter(QStringLiteral("name"));
 }
 
 void ContentType::setName(const QString & s, const QByteArray & cs) {
     Q_D(ContentType);
     d->encCS = cs;
     setParameter(QStringLiteral("name"), s);
 }
 
 QByteArray ContentType::id() const {
     return parameter(QStringLiteral("id")).toLatin1();
 }
 
 void ContentType::setId(const QByteArray & s) {
     setParameter(QStringLiteral("id"), QString::fromLatin1(s));
 }
 
 int ContentType::partialNumber() const {
     QByteArray p = parameter(QStringLiteral("number")).toLatin1();
     if (!p.isEmpty()) {
         return p.toInt();
     } else {
         return -1;
     }
 }
 
 int ContentType::partialCount() const {
     QByteArray p = parameter(QStringLiteral("total")).toLatin1();
     if (!p.isEmpty()) {
         return p.toInt();
     } else {
         return -1;
     }
 }
 
 void ContentType::setPartialParams(int total, int number) {
     setParameter(QStringLiteral("number"), QString::number(number));
     setParameter(QStringLiteral("total"), QString::number(total));
 }
 
 bool ContentType::parse(const char *&scursor, const char *const send,
                         bool isCRLF) {
     Q_D(ContentType);
     // content-type: type "/" subtype *(";" parameter)
     clear();
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return false; // empty header
     }
 
     // type
     QPair<const char *, int> maybeMimeType;
     if (!parseToken(scursor, send, maybeMimeType, ParseTokenNoFlag)) {
         return false;
     }
     // subtype
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send || *scursor != '/') {
         return false;
     }
     scursor++;
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return false;
     }
     QPair<const char *, int> maybeSubType;
     if (!parseToken(scursor, send, maybeSubType, ParseTokenNoFlag)) {
         return false;
     }
 
     d->mimeType.reserve(maybeMimeType.second + maybeSubType.second + 1);
     d->mimeType = QByteArray(maybeMimeType.first, maybeMimeType.second).toLower()
                     + '/' + QByteArray(maybeSubType.first, maybeSubType.second).toLower();
 
     // parameter list
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return true; // no parameters
     }
     if (*scursor != ';') {
         return false;
     }
     scursor++;
 
     if (!Parametrized::parse(scursor, send, isCRLF)) {
         return false;
     }
 
     return true;
 }
 
 //-----</Content-Type>-------------------------
 
 //-----<ContentID>----------------------
 
 kmime_mk_trivial_ctor_with_name_and_dptr(ContentID, SingleIdent, Content-ID)
 kmime_mk_dptr_ctor(ContentID, SingleIdent)
 
 bool ContentID::parse(const char *&scursor, const char *const send, bool isCRLF) {
     Q_D(ContentID);
     // Content-id := "<" contentid ">"
     // contentid := now whitespaces
 
     const char *origscursor = scursor;
     if (!SingleIdent::parse(scursor, send, isCRLF)) {
         scursor = origscursor;
         d->msgIdList.clear();
         d->cachedIdentifier.clear();
 
         while (scursor != send) {
             eatCFWS(scursor, send, isCRLF);
             // empty entry ending the list: OK.
             if (scursor == send) {
                 return true;
             }
             // empty entry: ignore.
             if (*scursor == ',') {
                 scursor++;
                 continue;
             }
 
             AddrSpec maybeContentId;
             // Almost parseAngleAddr
             if (scursor == send || *scursor != '<') {
                 return false;
             }
             scursor++; // eat '<'
 
             eatCFWS(scursor, send, isCRLF);
             if (scursor == send) {
                 return false;
             }
 
             // Save chars until '>''
             QByteArray result;
             if (!parseDotAtom(scursor, send, result, false)) {
                 return false;
             }
 
             eatCFWS(scursor, send, isCRLF);
             if (scursor == send || *scursor != '>') {
                 return false;
             }
             scursor++;
             // /Almost parseAngleAddr
 
             maybeContentId.localPart = QString::fromLatin1(result); // FIXME: just use QByteArray instead of AddrSpec in msgIdList?
             d->msgIdList.append(maybeContentId);
 
             eatCFWS(scursor, send, isCRLF);
             // header end ending the list: OK.
             if (scursor == send) {
                 return true;
             }
             // regular item separator: eat it.
             if (*scursor == ',') {
                 scursor++;
             }
         }
         return true;
     } else {
         return true;
     }
 }
 
 //-----</ContentID>----------------------
 
 //-----<ContentTransferEncoding>----------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(ContentTransferEncoding,
         Generics::Token, Content-Transfer-Encoding)
 //@endcond
 
 typedef struct {
     const char *s;
     int e;
 } encTableType;
 
 static const encTableType encTable[] = {
     { "7Bit", CE7Bit },
     { "8Bit", CE8Bit },
     { "quoted-printable", CEquPr },
     { "base64", CEbase64 },
     { "x-uuencode", CEuuenc },
     { "binary", CEbinary },
     { nullptr, 0}
 };
 
 void ContentTransferEncoding::clear() {
     Q_D(ContentTransferEncoding);
     d->decoded = true;
     d->cte = CE7Bit;
     Token::clear();
 }
 
 contentEncoding ContentTransferEncoding::encoding() const {
     return d_func()->cte;
 }
 
 void ContentTransferEncoding::setEncoding(contentEncoding e) {
     Q_D(ContentTransferEncoding);
     d->cte = e;
 
     for (int i = 0; encTable[i].s != nullptr; ++i) {
         if (d->cte == encTable[i].e) {
             setToken(encTable[i].s);
             break;
         }
     }
 }
 
 bool ContentTransferEncoding::isDecoded() const {
     return d_func()->decoded;
 }
 
 void ContentTransferEncoding::setDecoded(bool decoded) {
     Q_D(ContentTransferEncoding);
     d->decoded = decoded;
 }
 
 bool ContentTransferEncoding::needToEncode() const {
     const Q_D(ContentTransferEncoding);
     return d->decoded && (d->cte == CEquPr || d->cte == CEbase64);
 }
 
 bool ContentTransferEncoding::parse(const char  *&scursor,
                                     const char *const send, bool isCRLF) {
     Q_D(ContentTransferEncoding);
     clear();
     if (!Token::parse(scursor, send, isCRLF)) {
         return false;
     }
 
     // TODO: error handling in case of an unknown encoding?
     for (int i = 0; encTable[i].s != nullptr; ++i) {
         if (qstricmp(token().constData(), encTable[i].s) == 0) {
             d->cte = (contentEncoding)encTable[i].e;
             break;
         }
     }
     d->decoded = (d->cte == CE7Bit || d->cte == CE8Bit);
     return true;
 }
 
 //-----</ContentTransferEncoding>---------------------------
 
 //-----<ContentDisposition>--------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name_and_dptr(ContentDisposition,
         Generics::Parametrized, Content-Disposition)
 //@endcond
 
 QByteArray ContentDisposition::as7BitString(bool withHeaderType) const {
     if (isEmpty()) {
       return {};
     }
 
     QByteArray rv;
     if (withHeaderType) {
         rv += typeIntro();
     }
 
     if (d_func()->disposition == CDattachment) {
         rv += "attachment";
     } else if (d_func()->disposition == CDinline) {
         rv += "inline";
     } else {
       return {};
     }
 
     if (!Parametrized::isEmpty()) {
         rv += "; " + Parametrized::as7BitString(false);
     }
 
     return rv;
 }
 
 bool ContentDisposition::isEmpty() const {
     return d_func()->disposition == CDInvalid;
 }
 
 void ContentDisposition::clear() {
     Q_D(ContentDisposition);
     d->disposition = CDInvalid;
     Parametrized::clear();
 }
 
 contentDisposition ContentDisposition::disposition() const {
     return d_func()->disposition;
 }
 
 void ContentDisposition::setDisposition(contentDisposition disp) {
     Q_D(ContentDisposition);
     d->disposition = disp;
 }
 
 QString KMime::Headers::ContentDisposition::filename() const {
     return parameter(QStringLiteral("filename"));
 }
 
 void ContentDisposition::setFilename(const QString & filename) {
     setParameter(QStringLiteral("filename"), filename);
 }
 
 bool ContentDisposition::parse(const char  *&scursor, const char *const send,
                                 bool isCRLF) {
     Q_D(ContentDisposition);
     clear();
 
     // token
     QByteArray token;
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return false;
     }
 
     QPair<const char *, int> maybeToken;
     if (!parseToken(scursor, send, maybeToken, ParseTokenNoFlag)) {
         return false;
     }
 
     token = QByteArray(maybeToken.first, maybeToken.second).toLower();
     if (token == "inline") {
         d->disposition = CDinline;
     } else if (token == "attachment") {
         d->disposition = CDattachment;
     } else {
         return false;
     }
 
     // parameter list
     eatCFWS(scursor, send, isCRLF);
     if (scursor == send) {
         return true; // no parameters
     }
 
     if (*scursor != ';') {
         return false;
     }
     scursor++;
 
     return Parametrized::parse(scursor, send, isCRLF);
 }
 
 //-----</ContentDisposition>-------------------------
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name(Subject, Generics::Unstructured, Subject)
 //@endcond
 
 Base *createHeader(const QByteArray & type) {
     return HeaderFactory::createHeader(type);
 }
 
 //@cond PRIVATE
 kmime_mk_trivial_ctor_with_name(ContentDescription,
                                 Generics::Unstructured, Content-Description)
 kmime_mk_trivial_ctor_with_name(ContentLocation,
                                 Generics::Unstructured, Content-Location)
 kmime_mk_trivial_ctor_with_name(From, Generics::MailboxList, From)
 kmime_mk_trivial_ctor_with_name(Sender, Generics::SingleMailbox, Sender)
 kmime_mk_trivial_ctor_with_name(To, Generics::AddressList, To)
 kmime_mk_trivial_ctor_with_name(Cc, Generics::AddressList, Cc)
 kmime_mk_trivial_ctor_with_name(Bcc, Generics::AddressList, Bcc)
 kmime_mk_trivial_ctor_with_name(ReplyTo, Generics::AddressList, Reply-To)
 kmime_mk_trivial_ctor_with_name(Keywords, Generics::PhraseList, Keywords)
 kmime_mk_trivial_ctor_with_name(MIMEVersion, Generics::DotAtom, MIME-Version)
 kmime_mk_trivial_ctor_with_name(Supersedes, Generics::SingleIdent, Supersedes)
 kmime_mk_trivial_ctor_with_name(InReplyTo, Generics::Ident, In-Reply-To)
 kmime_mk_trivial_ctor_with_name(References, Generics::Ident, References)
 kmime_mk_trivial_ctor_with_name(Organization, Generics::Unstructured, Organization)
 kmime_mk_trivial_ctor_with_name(UserAgent, Generics::Unstructured, User-Agent)
 //@endcond
 
 } // namespace Headers
 
 } // namespace KMime