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/* Copyright (c) 2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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 "dbus/dbus_message.h"
#include <algorithm>
#include <cassert>
#include <dbus/dbus.h>
namespace dbus {
MessageRefKeeper::MessageRefKeeper() : raw_message_(NULL) {}
MessageRefKeeper::MessageRefKeeper(DBusMessage* message)
: raw_message_(message) {
assert(raw_message_);
dbus_message_ref(raw_message_);
}
MessageRefKeeper::~MessageRefKeeper() {
if (raw_message_) {
dbus_message_unref(raw_message_);
}
}
MessageRefKeeper::MessageRefKeeper(const MessageRefKeeper& other)
: raw_message_(other.raw_message_) {
assert(raw_message_);
dbus_message_ref(raw_message_);
}
MessageRefKeeper& MessageRefKeeper::operator=(MessageRefKeeper other) {
other.swap(*this);
return *this;
}
DBusMessage* MessageRefKeeper::get() const {
return raw_message_;
}
DBusMessage* MessageRefKeeper::Pass() {
DBusMessage* message = raw_message_;
raw_message_ = NULL;
return message;
}
void MessageRefKeeper::swap(MessageRefKeeper& other) {
std::swap(raw_message_, other.raw_message_);
}
MessageRef::MessageRef(DBusMessage* message) : raw_message_ref_(message) {}
MessageRef::~MessageRef() {}
std::string MessageRef::GetInterface() const {
return dbus_message_get_interface(raw_message_ref_.get());
}
std::string MessageRef::GetMember() const {
return dbus_message_get_member(raw_message_ref_.get());
}
// Message writer
MessageReader::MessageReader(const MessageRef& message)
: parent_reader_(NULL), failed_(false) {
dbus_bool_t success =
dbus_message_iter_init(message.raw_message_ref_.get(), &iterator_);
if (!success) {
MarkFailed();
}
}
MessageReader::MessageReader(MessageReader* reader,
DataType container_data_type)
: parent_reader_(reader), failed_(reader->has_failed()) {
assert(parent_reader_);
if (!failed_) {
if (reader->NextValueType() != container_data_type) {
MarkFailed();
} else {
dbus_message_iter_recurse(&reader->iterator_, &iterator_);
reader->MoveToNext();
}
}
}
bool MessageReader::NextIsDictEntry() const {
return NextValueType() == DBUS_TYPE_DICT_ENTRY;
}
MessageReader MessageReader::TakeArrayReader() {
return MessageReader(this, DBUS_TYPE_ARRAY);
}
MessageReader MessageReader::TakeStructReader() {
return MessageReader(this, DBUS_TYPE_STRUCT);
}
MessageReader MessageReader::TakeDictEntryReader() {
return MessageReader(this, DBUS_TYPE_DICT_ENTRY);
}
void MessageReader::MoveToNext() {
if (!HasNext()) {
MarkFailed();
}
dbus_message_iter_next(&iterator_);
}
void MessageReader::MarkFailed() {
if (!failed_) {
failed_ = true;
if (parent_reader_) {
parent_reader_->MarkFailed();
}
}
}
void MessageReader::ReadNextValue(MessageReader::DataType type, void* value) {
assert(value);
if (NextValueType() != type) {
MarkFailed();
} else if (!failed_) {
dbus_message_iter_get_basic(&iterator_, value);
MoveToNext();
}
}
// DbusMessageWriter
MessageWriter::MessageWriter(const MessageRef& message)
: has_opened_subcontainer_(false), parent_writer_(NULL) {
dbus_message_iter_init_append(message.raw_message_ref_.get(), &iterator_);
}
MessageWriter::MessageWriter(MessageWriter* parent,
ContainerType container_type,
const char* array_signature)
: has_opened_subcontainer_(false), parent_writer_(parent) {
assert(parent_writer_);
// Only array writers require array_signature
assert((container_type == kArray && array_signature != NULL) ||
(container_type != kArray && array_signature == NULL));
assert(!parent_writer_->has_opened_subcontainer_);
bool enough_memory = dbus_message_iter_open_container(
&parent_writer_->iterator_, container_type, array_signature, &iterator_);
assert(enough_memory);
parent_writer_->has_opened_subcontainer_ = true;
}
MessageWriter::~MessageWriter() {
assert(!has_opened_subcontainer_);
if (parent_writer_ != NULL) {
CloseWriter();
}
}
void MessageWriter::WriteAndCheck(MessageWriter::DataType value_type,
const void* value) {
assert(!has_opened_subcontainer_);
dbus_bool_t enough_memory =
dbus_message_iter_append_basic(&iterator_, value_type, value);
assert(enough_memory);
}
void MessageWriter::CloseWriter() {
assert(parent_writer_);
assert(parent_writer_->has_opened_subcontainer_);
dbus_bool_t enough_memory =
dbus_message_iter_close_container(&parent_writer_->iterator_, &iterator_);
assert(enough_memory);
parent_writer_->has_opened_subcontainer_ = false;
}
// Construction functions
MessageRef MethodCall(const char* bus_name,
const char* path,
const char* interface,
const char* method) {
return MessageRef(
dbus_message_new_method_call(bus_name, path, interface, method));
}
MessageRef Signal(const char* path, const char* interface, const char* name) {
return MessageRef(dbus_message_new_signal(path, interface, name));
}
} // namespace dbus
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