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Diffstat (limited to 'qt/qdbusmarshall.cpp')
| -rw-r--r-- | qt/qdbusmarshall.cpp | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/qt/qdbusmarshall.cpp b/qt/qdbusmarshall.cpp new file mode 100644 index 00000000..8afcb9f3 --- /dev/null +++ b/qt/qdbusmarshall.cpp @@ -0,0 +1,300 @@ +/* qdbusmarshall.cpp + * + * Copyright (C) 2005 Harald Fernengel <harry@kdevelop.org> + * + * Licensed under the Academic Free License version 2.1 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include "qdbusmarshall.h" +#include "qdbusvariant.h" + +#include <QtCore/qdebug.h> +#include <QtCore/qvariant.h> +#include <QtCore/qlist.h> +#include <QtCore/qmap.h> +#include <QtCore/qstringlist.h> +#include <QtCore/qvarlengtharray.h> +#include <QtCore/qvector.h> + +#include <dbus/dbus.h> + +template <typename T> +inline T qIterGet(DBusMessageIter *it) +{ + T t; + dbus_message_iter_get_basic(it, &t); + return t; +} + +static QStringList qFetchStringList(DBusMessageIter *arrayIt) +{ + QStringList list; + + DBusMessageIter it; + dbus_message_iter_recurse(arrayIt, &it); + + do { + list.append(QString::fromUtf8(qIterGet<char *>(&it))); + } while (dbus_message_iter_next(&it)); + + return list; +} + +static QVariant qFetchParameter(DBusMessageIter *it) +{ + switch (dbus_message_iter_get_arg_type(it)) { + case DBUS_TYPE_BYTE: + return qIterGet<unsigned char>(it); + case DBUS_TYPE_INT32: + return qIterGet<dbus_int32_t>(it); + case DBUS_TYPE_UINT32: + return qIterGet<dbus_uint32_t>(it); + case DBUS_TYPE_DOUBLE: + return qIterGet<double>(it); + case DBUS_TYPE_BOOLEAN: + return qIterGet<dbus_bool_t>(it); + case DBUS_TYPE_INT64: + return qIterGet<dbus_int64_t>(it); + case DBUS_TYPE_UINT64: + return qIterGet<dbus_uint64_t>(it); + case DBUS_TYPE_STRING: + case DBUS_TYPE_OBJECT_PATH: + case DBUS_TYPE_SIGNATURE: + return QString::fromUtf8(qIterGet<char *>(it)); + case DBUS_TYPE_ARRAY: { + int arrayType = dbus_message_iter_get_element_type(it); + if (arrayType == DBUS_TYPE_STRING || arrayType == DBUS_TYPE_OBJECT_PATH) { + return qFetchStringList(it); + } else if (arrayType == DBUS_TYPE_DICT_ENTRY) { + // ### support other types of maps? + QMap<QString, QVariant> map; + DBusMessageIter sub; + dbus_message_iter_recurse(it, &sub); + if (!dbus_message_iter_has_next(&sub)) + return map; + do { + DBusMessageIter itemIter; + dbus_message_iter_recurse(&sub, &itemIter); + Q_ASSERT(dbus_message_iter_has_next(&itemIter)); + QString key = qFetchParameter(&itemIter).toString(); + dbus_message_iter_next(&itemIter); + map.insertMulti(key, qFetchParameter(&itemIter)); + } while (dbus_message_iter_next(&sub)); + return map; + } else { + QList<QVariant> list; + DBusMessageIter sub; + dbus_message_iter_recurse(it, &sub); + if (!dbus_message_iter_has_next(&sub)) + return list; + do { + list.append(qFetchParameter(&sub)); + } while (dbus_message_iter_next(&sub)); + return list; + } + break; } + case DBUS_TYPE_VARIANT: { + QDBusVariant dvariant; + DBusMessageIter sub; + dbus_message_iter_recurse(it, &sub); + dvariant.signature = QString::fromUtf8(dbus_message_iter_get_signature(&sub)); + dvariant.value = qFetchParameter(&sub); + return qVariantFromValue(dvariant); + } +#if 0 + case DBUS_TYPE_DICT: { + QMap<QString, QVariant> map; + DBusMessageIter sub; + dbus_message + if (dbus_message_iter_init_dict_iterator(it, &dictIt)) { + do { + map[QString::fromUtf8(dbus_message_iter_get_dict_key(&dictIt))] = + qFetchParameter(&dictIt); + } while (dbus_message_iter_next(&dictIt)); + } + return map; + break; } + case DBUS_TYPE_CUSTOM: + return qGetCustomValue(it); + break; +#endif + default: + qWarning("Don't know how to handle type %d '%c'", dbus_message_iter_get_arg_type(it), dbus_message_iter_get_arg_type(it)); + return QVariant(); + break; + } +} + +void QDBusMarshall::messageToList(QList<QVariant> &list, DBusMessage *message) +{ + Q_ASSERT(message); + + DBusMessageIter it; + if (!dbus_message_iter_init(message, &it)) + return; + + do { + list.append(qFetchParameter(&it)); + } while (dbus_message_iter_next(&it)); +} + +#define DBUS_APPEND(type,dtype,var) \ +type dtype##v=(var); \ +dbus_message_append_args(msg, dtype, &dtype##v, DBUS_TYPE_INVALID) +#define DBUS_APPEND_LIST(type,dtype,var,size) \ +type dtype##v=(var); \ +dbus_message_append_args(msg, DBUS_TYPE_ARRAY, dtype, &dtype##v, size, DBUS_TYPE_INVALID) + + +static void qAppendToMessage(DBusMessageIter *it, const QString &str) +{ + QByteArray ba = str.toUtf8(); + const char *cdata = ba.constData(); + dbus_message_iter_append_basic(it, DBUS_TYPE_STRING, &cdata); +} + +static QVariant::Type qVariantListType(const QList<QVariant> &list) +{ + // TODO - catch lists that have a list as first parameter + QVariant::Type tp = list.value(0).type(); + if (tp < QVariant::Int || tp > QVariant::Double) + return QVariant::Invalid; + + for (int i = 1; i < list.count(); ++i) { + const QVariant &var = list.at(i); + if (var.type() != tp + && (var.type() != QVariant::List || qVariantListType(var.toList()) != tp)) + return QVariant::Invalid; + } + return tp; +} + +static const char *qDBusListType(const QList<QVariant> &list) +{ + static const char *DBusArgs[] = { 0, 0, DBUS_TYPE_INT32_AS_STRING, DBUS_TYPE_UINT32_AS_STRING, + DBUS_TYPE_INT64_AS_STRING, DBUS_TYPE_UINT64_AS_STRING, DBUS_TYPE_DOUBLE_AS_STRING }; + + return DBusArgs[qVariantListType(list)]; +} + +static void qListToIterator(DBusMessageIter *it, const QList<QVariant> &list); + +static void qVariantToIterator(DBusMessageIter *it, const QVariant &var) +{ + static const int Variant2DBus[] = { DBUS_TYPE_INVALID, + DBUS_TYPE_BOOLEAN, DBUS_TYPE_INT32, DBUS_TYPE_UINT32, + DBUS_TYPE_INT64, DBUS_TYPE_UINT64, DBUS_TYPE_DOUBLE }; + + // these really are static asserts + Q_ASSERT(QVariant::Invalid == 0); + Q_ASSERT(QVariant::Int == 2); + Q_ASSERT(QVariant::Double == 6); + + switch (var.type()) { + case QVariant::Int: + case QVariant::UInt: + case QVariant::LongLong: + case QVariant::ULongLong: + case QVariant::Double: + dbus_message_iter_append_basic(it, Variant2DBus[var.type()], + var.constData()); + break; + case QVariant::String: + qAppendToMessage(it, var.toString()); + break; + case QVariant::StringList: { + const QStringList list = var.toStringList(); + DBusMessageIter sub; + dbus_message_iter_open_container(it, DBUS_TYPE_ARRAY, + DBUS_TYPE_STRING_AS_STRING, &sub); + for (int s = 0; s < list.count(); ++s) + qAppendToMessage(&sub, list.at(s)); + dbus_message_iter_close_container(it, &sub); + break; + } + case QVariant::List: { + const QList<QVariant> &list = var.toList(); + const char *listType = qDBusListType(list); + if (!listType) { + qWarning("Don't know how to marshall list."); + break; + } + DBusMessageIter sub; + dbus_message_iter_open_container(it, DBUS_TYPE_ARRAY, listType, &sub); + qListToIterator(&sub, list); + dbus_message_iter_close_container(it, &sub); + break; + } + case QVariant::Map: { + // ### TODO - marshall more than qstring/qstring maps + const QMap<QString, QVariant> &map = var.toMap(); + DBusMessageIter sub; + QVarLengthArray<char, 16> sig; + sig.append(DBUS_DICT_ENTRY_BEGIN_CHAR); + sig.append(DBUS_TYPE_STRING); + sig.append(DBUS_TYPE_STRING); + sig.append(DBUS_DICT_ENTRY_END_CHAR); + sig.append('\0'); + qDebug() << QString::fromAscii(sig.constData()); + dbus_message_iter_open_container(it, DBUS_TYPE_ARRAY, sig.constData(), &sub); + for (QMap<QString, QVariant>::const_iterator mit = map.constBegin(); + mit != map.constEnd(); ++mit) { + DBusMessageIter itemIterator; + dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, 0, &itemIterator); + qAppendToMessage(&itemIterator, mit.key()); + qAppendToMessage(&itemIterator, mit.value().toString()); + dbus_message_iter_close_container(&sub, &itemIterator); + } + dbus_message_iter_close_container(it, &sub); + break; + } + case QVariant::UserType: { + if (var.userType() == QMetaTypeId<QDBusVariant>::qt_metatype_id()) { + DBusMessageIter sub; + QDBusVariant dvariant = qvariant_cast<QDBusVariant>(var); + dbus_message_iter_open_container(it, DBUS_TYPE_VARIANT, + dvariant.signature.toUtf8().constData(), &sub); + qVariantToIterator(&sub, dvariant.value); + dbus_message_iter_close_container(it, &sub); + break; + } + } + // fall through + default: + qWarning("Don't know how to handle type %s", var.typeName()); + break; + } +} + +void qListToIterator(DBusMessageIter *it, const QList<QVariant> &list) +{ + if (list.isEmpty()) + return; + + for (int i = 0; i < list.count(); ++i) + qVariantToIterator(it, list.at(i)); +} + +void QDBusMarshall::listToMessage(const QList<QVariant> &list, DBusMessage *msg) +{ + Q_ASSERT(msg); + DBusMessageIter it; + dbus_message_iter_init_append(msg, &it); + qListToIterator(&it, list); +} + |