Renamed src to backend

backend/utils/src/utils.cpp

@@ -0,0 +1,87 @@
+#include "framework.h"
+#include "utils.h"
+
+// Get current date/time, format is YYYY-MM-DD.HH:mm:ss
+const std::string CurrentDateTime()
+{
+    time_t     now = time(NULL);
+    struct tm  tstruct;
+    char       buf[80];
+    localtime_s(&tstruct, &now);
+    strftime(buf, sizeof(buf), "%Y-%m-%d.%X", &tstruct);
+    return buf;
+}
+
+std::wstring to_wstring(const std::string& str)
+{
+    unsigned int size_needed = MultiByteToWideChar(CP_UTF8, 0, &str[0], (unsigned int)str.size(), NULL, 0);
+    std::wstring wstrTo(size_needed, 0);
+    MultiByteToWideChar(CP_UTF8, 0, &str[0], (unsigned int)str.size(), &wstrTo[0], size_needed);
+    return wstrTo;
+}
+
+std::string to_string(json::value& value) {
+    return to_string(value.as_string());
+}
+
+std::string to_string(const std::wstring& wstr)
+{
+    if (wstr.empty())
+    {
+        return "";
+    }
+
+    const auto size_needed = WideCharToMultiByte(CP_UTF8, 0, &wstr.at(0), (unsigned int)wstr.size(), nullptr, 0, nullptr, nullptr);
+    if (size_needed <= 0)
+    {
+        throw std::runtime_error("WideCharToMultiByte() failed: " + std::to_string(size_needed));
+    }
+
+    std::string result(size_needed, 0);
+    WideCharToMultiByte(CP_UTF8, 0, &wstr.at(0), (unsigned int)wstr.size(), &result.at(0), size_needed, nullptr, nullptr);
+    return result;
+}
+
+std::string random_string(size_t length)
+{
+    srand(static_cast<unsigned int>(time(NULL)));
+    auto randchar = []() -> char
+    {
+        const char charset[] =
+            "0123456789"
+            "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+            "abcdefghijklmnopqrstuvwxyz";
+        const size_t max_index = (sizeof(charset) - 1);
+        return charset[rand() % max_index];
+    };
+    std::string str(length, 0);
+    std::generate_n(str.begin(), length, randchar);
+    return str;
+}
+
+bool operator== (const Coords& a, const Coords& b) { return a.lat == b.lat && a.lng == b.lng && a.alt == b.alt; }
+bool operator!= (const Coords& a, const Coords& b) { return !(a == b); }
+bool operator== (const Coords& a, const double& b) { return a.lat == b && a.lng == b && a.alt == b; }
+bool operator!= (const Coords& a, const double& b) { return !(a == b); }
+
+bool operator== (const Offset& a, const Offset& b) { return a.x == b.x && a.y == b.y && a.z == b.z; }
+bool operator!= (const Offset& a, const Offset& b) { return !(a == b); }
+bool operator== (const Offset& a, const double& b) { return a.x == b && a.y == b && a.z == b; }
+bool operator!= (const Offset& a, const double& b) { return !(a == b); }
+
+
+double knotsToMs(const double knots) {
+    return knots / 1.94384;
+}
+
+double msToKnots(const double ms) {
+    return ms * 1.94384;
+}
+
+double ftToM(const double ft) {
+    return ft * 0.3048;
+}
+
+double mToFt(const double m) {
+    return m / 0.3048;
+}