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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ * Copyright (C) 2021, Collabora Ltd.
+ *
+ * main.cpp - lc-compliance - The libcamera compliance tool
+ */
+
+#include <iomanip>
+#include <iostream>
+#include <string.h>
+
+#include <gtest/gtest.h>
+
+#include <libcamera/libcamera.h>
+
+#include "environment.h"
+#include "../cam/options.h"
+
+using namespace libcamera;
+
+enum {
+ OptCamera = 'c',
+ OptList = 'l',
+ OptFilter = 'f',
+ OptHelp = 'h',
+};
+
+/*
+ * Make asserts act like exceptions, otherwise they only fail (or skip) the
+ * current function. From gtest documentation:
+ * https://google.github.io/googletest/advanced.html#asserting-on-subroutines-with-an-exception
+ */
+class ThrowListener : public testing::EmptyTestEventListener
+{
+ void OnTestPartResult(const testing::TestPartResult &result) override
+ {
+ if (result.type() == testing::TestPartResult::kFatalFailure ||
+ result.type() == testing::TestPartResult::kSkip)
+ throw testing::AssertionException(result);
+ }
+};
+
+static void listCameras(CameraManager *cm)
+{
+ for (const std::shared_ptr<Camera> &cam : cm->cameras())
+ std::cout << "- " << cam.get()->id() << std::endl;
+}
+
+static int initCamera(CameraManager *cm, OptionsParser::Options options)
+{
+ std::shared_ptr<Camera> camera;
+
+ int ret = cm->start();
+ if (ret) {
+ std::cout << "Failed to start camera manager: "
+ << strerror(-ret) << std::endl;
+ return ret;
+ }
+
+ if (!options.isSet(OptCamera)) {
+ std::cout << "No camera specified, available cameras:" << std::endl;
+ listCameras(cm);
+ return -ENODEV;
+ }
+
+ const std::string &cameraId = options[OptCamera];
+ camera = cm->get(cameraId);
+ if (!camera) {
+ std::cout << "Camera " << cameraId << " not found, available cameras:" << std::endl;
+ listCameras(cm);
+ return -ENODEV;
+ }
+
+ Environment::get()->setup(cm, cameraId);
+
+ std::cout << "Using camera " << cameraId << std::endl;
+
+ return 0;
+}
+
+static int initGtestParameters(char *arg0, OptionsParser::Options options)
+{
+ const std::map<std::string, std::string> gtestFlags = { { "list", "--gtest_list_tests" },
+ { "filter", "--gtest_filter" } };
+
+ int argc = 0;
+ std::string filterParam;
+
+ /*
+ * +2 to have space for both the 0th argument that is needed but not
+ * used and the null at the end.
+ */
+ char **argv = new char *[(gtestFlags.size() + 2)];
+ if (!argv)
+ return -ENOMEM;
+
+ argv[0] = arg0;
+ argc++;
+
+ if (options.isSet(OptList)) {
+ argv[argc] = const_cast<char *>(gtestFlags.at("list").c_str());
+ argc++;
+ }
+
+ if (options.isSet(OptFilter)) {
+ /*
+ * The filter flag needs to be passed as a single parameter, in
+ * the format --gtest_filter=filterStr
+ */
+ filterParam = gtestFlags.at("filter") + "=" +
+ static_cast<const std::string &>(options[OptFilter]);
+
+ argv[argc] = const_cast<char *>(filterParam.c_str());
+ argc++;
+ }
+
+ argv[argc] = nullptr;
+
+ ::testing::InitGoogleTest(&argc, argv);
+
+ delete[] argv;
+
+ return 0;
+}
+
+static int initGtest(char *arg0, OptionsParser::Options options)
+{
+ int ret = initGtestParameters(arg0, options);
+ if (ret)
+ return ret;
+
+ testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
+
+ return 0;
+}
+
+static int parseOptions(int argc, char **argv, OptionsParser::Options *options)
+{
+ OptionsParser parser;
+ parser.addOption(OptCamera, OptionString,
+ "Specify which camera to operate on, by id", "camera",
+ ArgumentRequired, "camera");
+ parser.addOption(OptList, OptionNone, "List all tests and exit", "list");
+ parser.addOption(OptFilter, OptionString,
+ "Specify which tests to run", "filter",
+ ArgumentRequired, "filter");
+ parser.addOption(OptHelp, OptionNone, "Display this help message",
+ "help");
+
+ *options = parser.parse(argc, argv);
+ if (!options->valid())
+ return -EINVAL;
+
+ if (options->isSet(OptHelp)) {
+ parser.usage();
+ std::cerr << "Further options from Googletest can be passed as environment variables"
+ << std::endl;
+ return -EINTR;
+ }
+
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ OptionsParser::Options options;
+ int ret = parseOptions(argc, argv, &options);
+ if (ret == -EINTR)
+ return EXIT_SUCCESS;
+ if (ret < 0)
+ return EXIT_FAILURE;
+
+ std::unique_ptr<CameraManager> cm = std::make_unique<CameraManager>();
+
+ /* No need to initialize the camera if we'll just list tests */
+ if (!options.isSet(OptList)) {
+ ret = initCamera(cm.get(), options);
+ if (ret)
+ return ret;
+ }
+
+ ret = initGtest(argv[0], options);
+ if (ret)
+ return ret;
+
+ ret = RUN_ALL_TESTS();
+
+ if (!options.isSet(OptList))
+ cm->stop();
+
+ return ret;
+}