V0.8: Add vvp flag that allows $stop to act like $finish.

This patch adds a new flag to vvp "-n" that can be used to make
$stop and hence <Control-C> act like $finish. This may be desired
when using vvp in a non-interactive environment.

vvp/main.cc

@@ -129,6 +129,7 @@ int main(int argc, char*argv[])
       const char *logfile_name = 0x0;
       FILE *logfile = 0x0;
       extern void vpi_set_vlog_info(int, char**);
+      extern bool stop_is_finish;
 
 #ifdef __MINGW32__
 	/* In the Windows world, we get the first module path
@@ -144,7 +145,10 @@ int main(int argc, char*argv[])
       }
 #endif
 
-      while ((opt = getopt(argc, argv, "+dhl:M:m:v")) != EOF) switch (opt) {
+        /* For non-interactive runs we do not want to run the interactive
+         * debugger, so make $stop just execute a $finish. */
+      stop_is_finish = false;
+      while ((opt = getopt(argc, argv, "+dhl:M:m:nv")) != EOF) switch (opt) {
          case 'h':
            fprintf(stderr,
                    "Usage: vvp [options] input-file [+plusargs...]\n"
@@ -154,6 +158,7 @@ int main(int argc, char*argv[])
                    " -M path        VPI module directory\n"
 		   " -M -           Clear VPI module path\n"
                    " -m module      Load vpi module.\n"
+                   " -n             Non-interactive ($stop = $finish).\n"
                    " -v             Verbose progress messages.\n" );
            exit(0);
 	  case 'l':
@@ -170,6 +175,9 @@ int main(int argc, char*argv[])
 	  case 'm':
 	    module_tab[module_cnt++] = optarg;
 	    break;
+	  case 'n':
+	    stop_is_finish = true;
+	    break;
 	  case 'v':
 	    verbose_flag = true;
 	    break;

vvp/stop.cc

@@ -47,6 +47,7 @@
 #endif
 
 struct __vpiScope*stop_current_scope = 0;
+bool stop_is_finish;  /* When set, $stop acts like $finish (set in main.cc). */
 
 #ifdef USE_READLINE
 
@@ -449,6 +450,13 @@ static void invoke_command(char*txt)
 
 void stop_handler(int rc)
 {
+        /* The user may be running in a non-interactive environment, so
+         * they want $stop and <Control-C> to be the same as $finish. */
+      if (stop_is_finish) {
+	    schedule_finish(0);
+	    return;
+      }
+
       printf("** VVP Stop(%d) **\n", rc);
       printf("** Current simulation time is %" TIME_FMT "u ticks.\n",
       		schedule_simtime());

vvp/vvp.man

@@ -41,6 +41,11 @@ the module. However, if the name includes at least one directory
 character, then the search path is not scanned and the name is assumed
 to be a complete file name.
 .TP 8
+.B -n
+This flag makes $stop or a <Control-C> a synonym for $finish.
+It can be used to give the program a more meaningful interface when
+running in a non-interactive environment.
+.TP 8
 .B -v
 Turn on verbose messages. This will cause information about run time
 progress to be printed to standard out.