From ab129bc6c8b64cb55ddbe3ccbc05736aba579bc5 Mon Sep 17 00:00:00 2001
From: robtor <robtor2000@web.de>
Date: Wed, 1 Nov 2023 10:16:53 +0100
Subject: [PATCH] Add time measurement

---
 task1/main.cpp | 54 +++++++++++++++++++++++++++-----------------------
 1 file changed, 29 insertions(+), 25 deletions(-)

diff --git a/task1/main.cpp b/task1/main.cpp
index 8027720..a720003 100644
--- a/task1/main.cpp
+++ b/task1/main.cpp
@@ -1,6 +1,8 @@
 #include <fmt/format.h>
 #include <vector>
 #include <fstream>
+#include <string>
+#include <chrono>
 
 #include <mergesort.h>
 
@@ -20,43 +22,45 @@ Does α depend on the size of the input? If it does, how should you modify
 your predictions and their graphical illustration?
 */
 
+template<typename T>
+auto parse_file(std::ifstream &stream, std::vector<T> &vec) -> void {
+    std::string buf;
+    T convbuf;
+
+    while (std::getline(stream, buf)) {
+
+        convbuf = static_cast<T>(std::stoul(buf));
+
+        vec.emplace_back(std::move(convbuf));
+    }
+
+}
+
 int main(int argc, char *argv[]) {
     try {
         std::ifstream file("dataset.dat", std::ios_base::in);
+        if (!file.is_open()) {
+            fmt::print("Error opening file");
+            return -1;
+        }
 
         fmt::print("Opened file {} sucessfully!\n", "dummy");
+        std::vector<int32_t> dataset;
 
-        std::vector<int32_t> dataset{10, 3, 244, 23, 293, 2393, 302};
+        parse_file(file, dataset);
+        fmt::print("Read {} values from {}\n", dataset.size(), "dummy");
 
-//        std::vector<int32_t> dataset;
-//        int counter = 0;
-//
-//        while(!file.eof()) {
-//            int32_t buf;
-//            file >> buf;
-//            dataset.emplace_back(buf);
-//        }
-//
-//        fmt::print("Read {} values from {}\n", dataset.size(), "dummy");
+        auto t1 = std::chrono::high_resolution_clock::now();
 
         algo::mergesort(dataset.begin(), dataset.end(), [](int32_t a, int32_t b) {
-            return (a>b);
+            return (a > b);
         });
 
-        fmt::print("sorted");
+        auto t2 = std::chrono::high_resolution_clock::now();
 
-//        QFile outfile("dataset-sorted.dat");
-//        if(!outfile.open(QIODevice::WriteOnly | QIODevice::Text)) {
-//            fmt::print("Error! Could not create output file");
-//        }
-//
-//        for(auto &val : dataset) {
-//            outfile.write(fmt::format("{}\n", val).c_str());
-//        }
-//
-//        file.close();
-//        outfile.flush();
-//        outfile.close();
+
+        auto delay_ms = std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1);
+        fmt::print("Sorted {} entries within {} ms.", dataset.size(), delay_ms.count());
 
         return 0;