main: add parameter parsing

[model-checker.git] / main.cc

diff --git a/main.cc b/main.cc
index 6f1483b7decbcebb809c6469489b2815a0965516..f58f3040d98f0afd3240381445b6de93cbf723b6 100644 (file)
--- a/main.cc
+++ b/main.cc
@@ -2,6 +2,8 @@
  *  @brief Entry point for the model checker.
  */
 
+#include <unistd.h>
+
 #include "libthreads.h"
 #include "common.h"
 #include "threads.h"
@@ -12,7 +14,32 @@
 #include "model.h"
 #include "snapshot-interface.h"
 
+static void print_usage() {
+       printf(
+"Usage: <program name> [OPTIONS]\n"
+"\n"
+"Options:\n"
+"-h                    Display this help message and exit\n"
+);
+       exit(EXIT_SUCCESS);
+}
+
 static void parse_options(struct model_params *params, int argc, char **argv) {
+       const char *shortopts = "h";
+       int opt;
+       bool error = false;
+       while (!error && (opt = getopt(argc, argv, shortopts)) != -1) {
+               switch (opt) {
+               case 'h':
+                       print_usage();
+                       break;
+               default: /* '?' */
+                       error = true;
+                       break;
+               }
+       }
+       if (error)
+               print_usage();
 }
 
 int main_argc;
@@ -21,7 +48,6 @@ char **main_argv;
 /** The real_main function contains the main model checking loop. */
 static void real_main() {
        thrd_t user_thread;
-       ucontext_t main_context;
        struct model_params params;
 
        parse_options(&params, main_argc, main_argv);
@@ -34,11 +60,6 @@ static void real_main() {
 
        model = new ModelChecker(params);
 
-       if (getcontext(&main_context))
-               return;
-
-       model->set_system_context(&main_context);
-
        snapshotObject->snapshotStep(0);
        do {
                /* Start user program */