forked from Kistler-Group/sdbus-cpp
291 lines
10 KiB
C++
291 lines
10 KiB
C++
/**
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* (C) 2016 - 2017 KISTLER INSTRUMENTE AG, Winterthur, Switzerland
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* (C) 2016 - 2019 Stanislav Angelovic <angelovic.s@gmail.com>
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*
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* @file ProxyGenerator.cpp
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*
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* Created on: Feb 1, 2017
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* Project: sdbus-c++
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* Description: High-level D-Bus IPC C++ library based on sd-bus
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*
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* This file is part of sdbus-c++.
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*
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* sdbus-c++ is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* sdbus-c++ is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with sdbus-c++. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Own
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#include "generator_utils.h"
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#include "ProxyGenerator.h"
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// STL
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#include <iostream>
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#include <cstdlib>
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#include <algorithm>
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#include <iterator>
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using std::endl;
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using sdbuscpp::xml::Document;
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using sdbuscpp::xml::Node;
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using sdbuscpp::xml::Nodes;
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/**
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* Generate proxy code - client glue
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*/
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int ProxyGenerator::transformXmlToFileImpl(const Document &doc, const char *filename) const
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{
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Node &root = *(doc.root);
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Nodes interfaces = root["interface"];
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std::ostringstream code;
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code << createHeader(filename, StubType::PROXY);
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for (const auto& interface : interfaces)
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{
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code << processInterface(*interface);
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}
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code << "#endif" << endl;
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return writeToFile(filename, code.str());
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}
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std::string ProxyGenerator::processInterface(Node& interface) const
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{
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std::string ifaceName = interface.get("name");
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std::cout << "Generating proxy code for interface " << ifaceName << endl;
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unsigned int namespacesCount = 0;
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std::string namespacesStr;
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std::tie(namespacesCount, namespacesStr) = generateNamespaces(ifaceName);
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std::ostringstream body;
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body << namespacesStr;
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std::string className = ifaceName.substr(ifaceName.find_last_of(".") + 1)
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+ "_proxy";
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body << "class " << className << endl
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<< "{" << endl
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<< "public:" << endl
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<< tab << "static constexpr const char* INTERFACE_NAME = \"" << ifaceName << "\";" << endl << endl
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<< "protected:" << endl
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<< tab << className << "(sdbus::IProxy& proxy)" << endl
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<< tab << tab << ": proxy_(proxy)" << endl;
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Nodes methods = interface["method"];
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Nodes signals = interface["signal"];
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Nodes properties = interface["property"];
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std::string registration, declaration;
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std::tie(registration, declaration) = processSignals(signals);
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body << tab << "{" << endl
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<< registration
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<< tab << "}" << endl << endl;
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body << tab << "~" << className << "() = default;" << endl << endl;
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if (!declaration.empty())
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body << declaration << endl;
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std::string methodDefinitions, asyncDeclarations;
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std::tie(methodDefinitions, asyncDeclarations) = processMethods(methods);
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if (!asyncDeclarations.empty())
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{
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body << asyncDeclarations << endl;
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}
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if (!methodDefinitions.empty())
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{
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body << "public:" << endl << methodDefinitions;
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}
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std::string propertyDefinitions = processProperties(properties);
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if (!propertyDefinitions.empty())
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{
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body << "public:" << endl << propertyDefinitions;
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}
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body << "private:" << endl
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<< tab << "sdbus::IProxy& proxy_;" << endl
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<< "};" << endl << endl
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<< std::string(namespacesCount, '}') << " // namespaces" << endl << endl;
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return body.str();
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}
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std::tuple<std::string, std::string> ProxyGenerator::processMethods(const Nodes& methods) const
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{
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std::ostringstream definitionSS, asyncDeclarationSS;
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for (const auto& method : methods)
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{
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auto name = method->get("name");
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Nodes args = (*method)["arg"];
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Nodes inArgs = args.select("direction" , "in");
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Nodes outArgs = args.select("direction" , "out");
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bool dontExpectReply{false};
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bool async{false};
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std::string timeoutValue;
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Nodes annotations = (*method)["annotation"];
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for (const auto& annotation : annotations)
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{
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if (annotation->get("name") == "org.freedesktop.DBus.Method.NoReply" && annotation->get("value") == "true")
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dontExpectReply = true;
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else if (annotation->get("name") == "org.freedesktop.DBus.Method.Async"
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&& (annotation->get("value") == "client" || annotation->get("value") == "clientserver"))
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async = true;
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if (annotation->get("name") == "org.freedesktop.DBus.Method.Timeout")
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timeoutValue = annotation->get("value");
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}
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if (dontExpectReply && outArgs.size() > 0)
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{
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std::cerr << "Function: " << name << ": ";
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std::cerr << "Option 'org.freedesktop.DBus.Method.NoReply' not allowed for methods with 'out' variables! Option ignored..." << std::endl;
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dontExpectReply = false;
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}
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if (!timeoutValue.empty() && dontExpectReply)
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{
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std::cerr << "Function: " << name << ": ";
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std::cerr << "Option 'org.freedesktop.DBus.Method.Timeout' not allowed for 'NoReply' methods! Option ignored..." << std::endl;
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timeoutValue.clear();
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}
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auto retType = outArgsToType(outArgs);
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std::string inArgStr, inArgTypeStr;
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std::tie(inArgStr, inArgTypeStr, std::ignore) = argsToNamesAndTypes(inArgs);
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std::string outArgStr, outArgTypeStr;
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std::tie(outArgStr, outArgTypeStr, std::ignore) = argsToNamesAndTypes(outArgs);
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definitionSS << tab << (async ? "void" : retType) << " " << name << "(" << inArgTypeStr << ")" << endl
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<< tab << "{" << endl;
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if (!timeoutValue.empty())
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{
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definitionSS << tab << tab << "using namespace std::chrono_literals;" << endl;
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}
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if (outArgs.size() > 0 && !async)
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{
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definitionSS << tab << tab << retType << " result;" << endl;
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}
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definitionSS << tab << tab << "proxy_.callMethod" << (async ? "Async" : "") << "(\"" << name << "\")"
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".onInterface(INTERFACE_NAME)";
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if (!timeoutValue.empty())
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{
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definitionSS << ".withTimeout(" << timeoutValue << "us)";
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}
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if (inArgs.size() > 0)
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{
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definitionSS << ".withArguments(" << inArgStr << ")";
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}
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if (async && !dontExpectReply)
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{
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auto nameBigFirst = name;
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nameBigFirst[0] = islower(nameBigFirst[0]) ? nameBigFirst[0] + 'A' - 'a' : nameBigFirst[0];
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definitionSS << ".uponReplyInvoke([this](const sdbus::Error* error" << (outArgTypeStr.empty() ? "" : ", ") << outArgTypeStr << ")"
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"{ this->on" << nameBigFirst << "Reply(" << outArgStr << (outArgStr.empty() ? "" : ", ") << "error); })";
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asyncDeclarationSS << tab << "virtual void on" << nameBigFirst << "Reply("
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<< outArgTypeStr << (outArgTypeStr.empty() ? "" : ", ") << "const sdbus::Error* error) = 0;" << endl;
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}
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else if (outArgs.size() > 0)
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{
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definitionSS << ".storeResultsTo(result);" << endl
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<< tab << tab << "return result";
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}
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else if (dontExpectReply)
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{
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definitionSS << ".dontExpectReply()";
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}
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definitionSS << ";" << endl << tab << "}" << endl << endl;
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}
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return std::make_tuple(definitionSS.str(), asyncDeclarationSS.str());
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}
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std::tuple<std::string, std::string> ProxyGenerator::processSignals(const Nodes& signals) const
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{
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std::ostringstream registrationSS, declarationSS;
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for (const auto& signal : signals)
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{
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auto name = signal->get("name");
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Nodes args = (*signal)["arg"];
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auto nameBigFirst = name;
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nameBigFirst[0] = islower(nameBigFirst[0]) ? nameBigFirst[0] + 'A' - 'a' : nameBigFirst[0];
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std::string argStr, argTypeStr;
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std::tie(argStr, argTypeStr, std::ignore) = argsToNamesAndTypes(args);
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registrationSS << tab << tab << "proxy_"
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".uponSignal(\"" << name << "\")"
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".onInterface(INTERFACE_NAME)"
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".call([this](" << argTypeStr << ")"
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"{ this->on" << nameBigFirst << "(" << argStr << "); });" << endl;
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declarationSS << tab << "virtual void on" << nameBigFirst << "(" << argTypeStr << ") = 0;" << endl;
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}
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return std::make_tuple(registrationSS.str(), declarationSS.str());
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}
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std::string ProxyGenerator::processProperties(const Nodes& properties) const
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{
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std::ostringstream propertySS;
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for (const auto& property : properties)
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{
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auto propertyName = property->get("name");
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auto propertyAccess = property->get("access");
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auto propertySignature = property->get("type");
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auto propertyType = signature_to_type(propertySignature);
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auto propertyArg = std::string("value");
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auto propertyTypeArg = std::string("const ") + propertyType + "& " + propertyArg;
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if (propertyAccess == "read" || propertyAccess == "readwrite")
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{
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propertySS << tab << propertyType << " " << propertyName << "()" << endl
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<< tab << "{" << endl;
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propertySS << tab << tab << "return proxy_.getProperty(\"" << propertyName << "\")"
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".onInterface(INTERFACE_NAME)";
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propertySS << ";" << endl << tab << "}" << endl << endl;
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}
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if (propertyAccess == "readwrite" || propertyAccess == "write")
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{
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propertySS << tab << "void " << propertyName << "(" << propertyTypeArg << ")" << endl
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<< tab << "{" << endl;
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propertySS << tab << tab << "proxy_.setProperty(\"" << propertyName << "\")"
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".onInterface(INTERFACE_NAME)"
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".toValue(" << propertyArg << ")";
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propertySS << ";" << endl << tab << "}" << endl << endl;
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}
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}
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return propertySS.str();
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}
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