qdbusmarshaller.cpp

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#include "qdbusargument_p.h"
#include "qdbusutil_p.h"

static void qIterAppend(DBusMessageIter *it, QByteArray *ba, int type, const void *arg)
{
    if (ba)
        *ba += char(type);
    else
        dbus_message_iter_append_basic(it, type, arg);
}

QDBusMarshaller::~QDBusMarshaller()
{
    close();
}

inline QString QDBusMarshaller::currentSignature()
{
    if (message)
        return QString::fromUtf8(dbus_message_get_signature(message));
    return QString();
}

inline void QDBusMarshaller::append(uchar arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_BYTE, &arg);
}

inline void QDBusMarshaller::append(bool arg)
{
    dbus_bool_t cast = arg;
    qIterAppend(&iterator, ba, DBUS_TYPE_BOOLEAN, &cast);
}

inline void QDBusMarshaller::append(short arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_INT16, &arg);
}

inline void QDBusMarshaller::append(ushort arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_UINT16, &arg);
}

inline void QDBusMarshaller::append(int arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_INT32, &arg);
}

inline void QDBusMarshaller::append(uint arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_UINT32, &arg);
}

inline void QDBusMarshaller::append(qlonglong arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_INT64, &arg);
}

inline void QDBusMarshaller::append(qulonglong arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_UINT64, &arg);
}

inline void QDBusMarshaller::append(double arg)
{
    qIterAppend(&iterator, ba, DBUS_TYPE_DOUBLE, &arg);
}

void QDBusMarshaller::append(const QString &arg)
{
    QByteArray data = arg.toUtf8();
    const char *cdata = data.constData();
    qIterAppend(&iterator, ba, DBUS_TYPE_STRING, &cdata);
}

inline void QDBusMarshaller::append(const QDBusObjectPath &arg)
{
    QByteArray data = arg.path().toUtf8();
    const char *cdata = data.constData();
    qIterAppend(&iterator, ba, DBUS_TYPE_OBJECT_PATH, &cdata);
}

inline void QDBusMarshaller::append(const QDBusSignature &arg)
{
    QByteArray data = arg.signature().toUtf8();
    const char *cdata = data.constData();
    qIterAppend(&iterator, ba, DBUS_TYPE_SIGNATURE, &cdata);
}

inline void QDBusMarshaller::append(const QByteArray &arg)
{
    if (ba) {
        *ba += DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_BYTE_AS_STRING;
        return;
    }

    const char* cdata = arg.constData();
    DBusMessageIter subiterator;
    dbus_message_iter_open_container(&iterator, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE_AS_STRING,
                                     &subiterator);
    dbus_message_iter_append_fixed_array(&subiterator, DBUS_TYPE_BYTE, &cdata, arg.length());
    dbus_message_iter_close_container(&iterator, &subiterator);
}

inline bool QDBusMarshaller::append(const QDBusVariant &arg)
{
    if (ba) {
        *ba += DBUS_TYPE_VARIANT_AS_STRING;
        return true;
    }

    const QVariant &value = arg.variant();
    QVariant::Type id = QVariant::Type(value.userType());
    if (id == QVariant::Invalid) {
        qWarning("QDBusMarshaller: cannot add a null QDBusVariant");
        error();
        return false;
    }

    const char *signature = QDBusMetaType::typeToSignature(id);
    if (!signature) {
        qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                 "Use qDBusRegisterMetaType to register it",
                 QVariant::typeToName( id ), id);
        error();
        return false;
    }

    QDBusMarshaller sub;
    open(sub, DBUS_TYPE_VARIANT, signature);
    bool isOk = sub.appendVariantInternal(value);
    // don't call sub.close(): it auto-closes

    return isOk;
}

inline void QDBusMarshaller::append(const QStringList &arg)
{
    if (ba) {
        *ba += DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_STRING_AS_STRING;
        return;
    }

    QDBusMarshaller sub;
    open(sub, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING_AS_STRING);
    QStringList::ConstIterator it = arg.constBegin();
    QStringList::ConstIterator end = arg.constEnd();
    for ( ; it != end; ++it)
        sub.append(*it);
    // don't call sub.close(): it auto-closes
}

inline QDBusMarshaller *QDBusMarshaller::beginStructure()
{
    return beginCommon(DBUS_TYPE_STRUCT, 0);
}

inline QDBusMarshaller *QDBusMarshaller::beginArray(int id)
{
    const char *signature = QDBusMetaType::typeToSignature( QVariant::Type(id) );
    if (!signature) {
        qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                 "Use qDBusRegisterMetaType to register it",
                 QVariant::typeToName( QVariant::Type(id) ), id);
        error();
        return this;
    }

    return beginCommon(DBUS_TYPE_ARRAY, signature);
}

inline QDBusMarshaller *QDBusMarshaller::beginMap(int kid, int vid)
{
    const char *ksignature = QDBusMetaType::typeToSignature( QVariant::Type(kid) );
    if (!ksignature) {
        qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                 "Use qDBusRegisterMetaType to register it",
                 QVariant::typeToName( QVariant::Type(kid) ), kid);
        error();
        return this;
    }
    if (ksignature[1] != 0 || !dbus_type_is_basic(*ksignature)) {
        qWarning("QDBusMarshaller: type '%s' (%d) cannot be used as the key type in a D-BUS map.",
                 QVariant::typeToName( QVariant::Type(kid) ), kid);
        error();
        return this;
    }

    const char *vsignature = QDBusMetaType::typeToSignature( QVariant::Type(vid) );
    if (!vsignature) {
        qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                 "Use qDBusRegisterMetaType to register it",
                 QVariant::typeToName( QVariant::Type(vid) ), vid);
        error();
        return this;
    }

    QByteArray signature;
    signature = DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING;
    signature += ksignature;
    signature += vsignature;
    signature += DBUS_DICT_ENTRY_END_CHAR_AS_STRING;
    return beginCommon(DBUS_TYPE_ARRAY, signature);
}

inline QDBusMarshaller *QDBusMarshaller::beginMapEntry()
{
    return beginCommon(DBUS_TYPE_DICT_ENTRY, 0);
}

void QDBusMarshaller::open(QDBusMarshaller &sub, int code, const char *signature)
{
    sub.parent = this;
    sub.ba = ba;
    sub.ok = true;

    if (ba)
        switch (code) {
        case DBUS_TYPE_ARRAY:
            *ba += char(code);
            *ba += signature;
            // fall through