Viewport: Allow horizontal scrolling via mouse wheel tilting

[pulseview.git] / main.cpp

diff --git a/main.cpp b/main.cpp
index 661c84a6d23c0ea40d128a52fe8584608f624fd7..f4506787364fa11ea01286cf2e569ffed5587c15 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -24,6 +24,8 @@ extern "C" {
 #include <libsigrok/libsigrok.h>
 }
 
+#include <getopt.h>
+
 #include <QtGui/QApplication>
 #include <QDebug>
 
@@ -31,50 +33,97 @@ extern "C" {
 
 #include "config.h"
 
+void usage()
+{
+       fprintf(stderr,
+               "Usage:\n"
+               "  %s — %s\n"
+               "\n"
+               "Help Options:\n"
+               "  -V, --version                   Show release version\n"
+               "  -h, -?, --help                  Show help option\n"
+               "\n", PV_BIN_NAME, PV_DESCRIPTION);
+}
+
 int main(int argc, char *argv[])
 {
+       int ret = 0;
+       struct sr_context *sr_ctx = NULL;
+
        QApplication a(argc, argv);
 
-       /* Set some application metadata. */
+       // Set some application metadata
        QApplication::setApplicationVersion(PV_VERSION_STRING);
        QApplication::setApplicationName("PulseView");
        QApplication::setOrganizationDomain("http://www.sigrok.org");
 
-       /* Initialise libsigrok */
-       if (sr_init() != SR_OK) {
-               qDebug() << "ERROR: libsigrok init failed.";
-               return 1;
+       // Parse arguments
+       while (1) {
+               static const struct option long_options[] = {
+                       {"version", no_argument, 0, 'V'},
+                       {"help", no_argument, 0, 'h'},
+                       {0, 0, 0, 0}
+               };
+
+               const char c = getopt_long(argc, argv,
+                       "Vh?", long_options, NULL);
+               if (c == -1)
+                       break;
+
+               switch (c) {
+               case 'V':
+                       // Print version info
+                       fprintf(stderr, "%s %s\n", PV_TITLE, PV_VERSION_STRING);
+                       return 0;
+
+               case 'h':
+               case '?':
+                       usage();
+                       return 0;
+               }
        }
 
-       /* Initialise libsigrokdecode */
-       if (srd_init(NULL) != SRD_OK) {
-               qDebug() << "ERROR: libsigrokdecode init failed.";
+       // Initialise libsigrok
+       if (sr_init(&sr_ctx) != SR_OK) {
+               qDebug() << "ERROR: libsigrok init failed.";
                return 1;
        }
 
-       /* Load the protocol decoders */
-       srd_decoder_load_all();
+       // Initialise libsigrokdecode
+       if (srd_init(NULL) == SRD_OK) {
 
-       /* Initialize all libsigrok drivers. */
-       sr_dev_driver **const drivers = sr_driver_list();
-       for (sr_dev_driver **driver = drivers; *driver; driver++) {
-               if (sr_driver_init(*driver) != SR_OK) {
-                       qDebug("Failed to initialize driver %s",
-                               (*driver)->name);
-                       return 1;
+               // Load the protocol decoders
+               srd_decoder_load_all();
+
+               // Initialize all libsigrok drivers
+               sr_dev_driver **const drivers = sr_driver_list();
+               for (sr_dev_driver **driver = drivers; *driver; driver++) {
+                       if (sr_driver_init(sr_ctx, *driver) != SR_OK) {
+                               qDebug("Failed to initialize driver %s",
+                                       (*driver)->name);
+                               ret = 1;
+                               break;
+                       }
                }
-       }
 
-       /* Initialise the main window */
-       pv::MainWindow w;
-       w.show();
+               if (ret == 0) {
+                       // Initialise the main window
+                       pv::MainWindow w;
+                       w.show();
 
-       /* Run the application */
-       const int ret = a.exec();
+                       // Run the application
+                       ret = a.exec();
+               }
+
+               // Destroy libsigrokdecode and libsigrok
+               srd_exit();
+
+       } else {
+               qDebug() << "ERROR: libsigrokdecode init failed.";
+       }
 
-       /* Destroy libsigrokdecode and libsigrok */
-       srd_exit();
-       sr_exit();
+       if (sr_ctx)
+               sr_exit(sr_ctx);
 
        return ret;
 }