USB updates, remove iostream usage

.clang-format

@@ -41,7 +41,7 @@ BreakBeforeBinaryOperators: None
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializers: BeforeColon
 BreakInheritanceList: BeforeColon
-ColumnLimit: 120
+ColumnLimit: 100
 CompactNamespaces: false
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true

.vscode/settings.json

@@ -1,6 +1,5 @@
 {
-  "clangd.arguments": ["-background-index", "-compile-commands-dir=builddir"],
-  "C_Cpp.codeAnalysis.clangTidy.args": ["-extra-arg=-std=c++17"],
+  "clangd.arguments": ["-background-index", "-compile-commands-dir=builddir/"],
   "editor.formatOnType": false,
   "editor.formatOnSave": true,
   "files.associations": {
@@ -84,5 +83,7 @@
     "charconv": "cpp",
     "*.ipp": "cpp"
   },
-  "clang-tidy.buildPath": "builddir/"
+  "clang-tidy.buildPath": "builddir/",
+  "clangd.onConfigChanged": "restart",
+  "C_Cpp.default.compileCommands": "builddir/compile_commands.json"
 }

inc/Usb.hpp

@@ -15,6 +15,7 @@ class Usb : public IUsb {
     bool close(UsbDevice) override;
 
    private:
+    libusb_device** mLibUsbDevs;
     // TODO: This should be a std::map with handles & locking on access
     std::vector<UsbDevice> mDevices{};
 };

inc/UsbTypes.hpp

@@ -1,3 +1,4 @@
+#include <memory>
 
 #include <libusb-1.0/libusb.h>
 
@@ -5,6 +6,14 @@
 
 namespace ptprnt::driver {
 
+struct libusb_device_list_ptr_deleter {
+    void operator()(libusb_device** usbdevicelistptr) {
+        libusb_free_device_list(usbdevicelistptr, 1);
+    }
+};
+
+typedef std::unique_ptr<libusb_device**, libusb_device_list_ptr_deleter> libusb_device_list_ptr;
+
 struct UsbDevice {
     uint16_t vendorId{0};
     uint16_t productId{0};

src/Usb.cpp

@@ -2,10 +2,13 @@
 
 #include <spdlog/spdlog.h>
 
+#include <cstddef>
 #include <iomanip>
 #include <iostream>
 #include <optional>
 
+#include "UsbTypes.hpp"
+
 namespace ptprnt::driver {
 
 Usb::Usb() {
@@ -18,37 +21,31 @@ Usb::~Usb() {
 }
 
 std::optional<std::vector<UsbDevice>> Usb::getDevices() {
-    // TODO: wrap libUsbDevs in a smart pointer with custom destructor
-    //       calling libusb_free_device_list
-    libusb_device** libUsbDevs;
     libusb_device* libUsbDev;
     struct libusb_device_descriptor libUsbDesc;
     int ret, i = 0;
 
     mDevices.clear();
 
-    if (0 == (ret = libusb_get_device_list(NULL, &libUsbDevs))) {
+    if (0 == (ret = libusb_get_device_list(NULL, &mLibUsbDevs))) {
         spdlog::error("Could not find any USB devices: {}", libusb_error_name(ret));
         return std::nullopt;
     }
 
-    while ((libUsbDev = libUsbDevs[i++]) != NULL) {
-        UsbDevice newDev;
-
+    while ((libUsbDev = mLibUsbDevs[i++]) != NULL) {
         if ((ret = libusb_get_device_descriptor(libUsbDev, &libUsbDesc)) < 0) {
-            spdlog::error("failed to open device");
-            libusb_free_device_list(libUsbDevs, 1);
+            spdlog::error("failed to get device");
             return std::nullopt;
         }
 
-        newDev.vendorId = libUsbDesc.idVendor;
-        newDev.productId = libUsbDesc.idProduct;
-        newDev.device = libUsbDev;
-        newDev.hndl = nullptr;  // handle is only available after we opened the dev
+        UsbDevice newDev{.vendorId = libUsbDesc.idVendor,
+                         .productId = libUsbDesc.idProduct,
+                         .device = libUsbDev,
+                         .hndl = nullptr};  // handle is only available after we opened the dev
+
         mDevices.push_back(newDev);
     }
     
-    libusb_free_device_list(libUsbDevs, 1);
     return mDevices;
 }
 
@@ -95,7 +92,7 @@ bool Usb::close(UsbDevice dev) {
             dev.vendorId, dev.productId, libusb_error_name(ret));
     }
 
-    std::cout << "test" << std::endl;
+    spdlog::debug("test");
     libusb_close(dev.hndl);
     return true;
 }

src/main.cpp

@@ -26,7 +26,7 @@ int main(int argc, char** argv) {
     }
 
     auto driver = std::make_shared<driver::P700Driver>(usb);
-    auto printer = std::make_unique<printer::P700Printer>(std::move(driver));
+    auto printer = std::make_shared<printer::P700Printer>(std::move(driver));
     //printer::info info = printer->getInfo();
 
     return 0;