Support for sequential and parallel sort

task1/CMakeLists.txt

@@ -44,6 +44,8 @@ target_link_libraries(task1-randgen PRIVATE
 add_executable(task1-sorter)
 target_sources(task1-sorter PRIVATE
         src/task1-sorter.cpp)
+target_include_directories(task1-sorter PRIVATE
+${CMAKE_CURRENT_SOURCE_DIR}/include)
 target_link_libraries(task1-sorter PRIVATE
         Qt6::Core)
 

task1/src/task1-randgen.cpp

@@ -8,7 +8,7 @@
 #include <ranges>
 
 
-int main(int argc, char *argv[]) {
+auto main(int argc, char *argv[]) -> int{
     QCoreApplication app(argc, argv);
     QCoreApplication::setApplicationName("Random dataset generator");
     QCoreApplication::setApplicationVersion("1.0");

task1/src/task1-sorter.cpp

@@ -7,8 +7,11 @@
 #include <cmath>
 #include <thread>
 #include <ranges>
+#include <chrono>
 
-int main(int argc, char *argv[]) {
+#include <mergesort_mt.h>
+
+auto main(int argc, char *argv[]) -> int {
     QCoreApplication app(argc, argv);
     QCoreApplication::setApplicationName("Multi purpose mergesort application");
     QCoreApplication::setApplicationVersion("1.0.42");
@@ -16,7 +19,8 @@ int main(int argc, char *argv[]) {
 
 
     QCommandLineParser parser;
-    parser.setApplicationDescription("Used to run either sequential or parallel mergesort on a texfile containing ascii encoded int32s");
+    parser.setApplicationDescription(
+            "Used to run either sequential or parallel mergesort on a texfile containing ascii encoded int32s");
     parser.addHelpOption();
     parser.addVersionOption();
 
@@ -30,9 +34,39 @@ int main(int argc, char *argv[]) {
     parser.addOption(nthreads);
 
     parser.addPositionalArgument("dataset", "Filename where to load the data from");
-
     parser.process(app);
 
+    const QStringList args = parser.positionalArguments();
+
+    if (args.length() != 1) {
+        parser.showHelp(-1);
+    }
+
+    const QString source = args.at(0);
+    QFile input(source);
+    if (!input.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        print << "Could not open file " << source << " for reading" << Qt::endl;
+        print << input.errorString();
+        app.exit(-1);
+        return app.exec();
+    }
+
+    std::vector<int32_t> dataset;
+
+    QTextStream stream(&input);
+    while (!stream.atEnd()) {
+        QString line = stream.readLine();
+        bool ok;
+        int parsed_value = line.toUInt(&ok);
+        if (!ok) {
+            print << "Error converting value: " << line << Qt::endl;
+        } else {
+            dataset.push_back(std::move(parsed_value));
+        }
+    }
+
+    print << "Read " << dataset.size() << " values from " << source << Qt::endl;
+
     const int threads = std::thread::hardware_concurrency();
     int max_depth = std::sqrt(threads);
 
@@ -49,7 +83,39 @@ int main(int argc, char *argv[]) {
         print << "Assuming default parallelized recursion depth via sqrt(nthreads) of " << max_depth << Qt::endl;
     }
 
+    if (parser.isSet(sequential)) {
+        auto buf = dataset;
+        auto t1 = std::chrono::high_resolution_clock::now();
+        MergeSorterMT<int32_t> sorter(
+                [](int32_t a, int32_t b) {
+                    return (a > b);
+                }, 0);
+        sorter.sort(buf);
+        auto t2 = std::chrono::high_resolution_clock::now();
+        auto diff = t2 - t1;
 
+        print << "=> Duration for sequential sort: " << std::chrono::duration_cast<std::chrono::milliseconds>(diff).count() << " ms" << Qt::endl;
+    }
+
+    if (parser.isSet(parallel)) {
+        auto buf = dataset;
+        auto t1 = std::chrono::high_resolution_clock::now();
+        MergeSorterMT<int32_t> sorter(
+                [](int32_t a, int32_t b) {
+                    return (a > b);
+                }, max_depth);
+        sorter.sort(buf);
+        auto t2 = std::chrono::high_resolution_clock::now();
+        auto diff = t2 - t1;
+
+        print << "=> Duration for parallel sort: " << std::chrono::duration_cast<std::chrono::milliseconds>(diff).count() << " ms" << Qt::endl;
+    }
+
+    if(parser.isSet(output)) {
+        print << "Sooory, not yet implemented :( you might do it yourself!" << Qt::endl;
+        app.exit(-1);
+        return app.exec();
+    }
 
     app.exit(0);
     return 0;