Add support for auto_boolean (true, false or auto).

1 files changed, 90 insertions, 6 deletions

diff --git a/gdb/command.c b/gdb/command.c
index d9284cd..c7cbbfd 100644
--- a/gdb/command.c
+++ b/gdb/command.c
@@ -327,6 +327,25 @@ add_set_enum_cmd (char *name,
   return c;
 }
 
+/* Add element named NAME to command list LIST (the list for set
+   or some sublist thereof).
+   CLASS is as in add_cmd.
+   VAR is address of the variable which will contain the value.
+   DOC is the documentation string.  */
+struct cmd_list_element *
+add_set_auto_boolean_cmd (char *name,
+			  enum command_class class,
+			  enum cmd_auto_boolean *var,
+			  char *doc,
+			  struct cmd_list_element **list)
+{
+  static const char *auto_boolean_enums[] = { "on", "off", "auto", NULL };
+  struct cmd_list_element *c;
+  c = add_set_cmd (name, class, var_auto_boolean, var, doc, list);
+  c->enums = auto_boolean_enums;
+  return c;
+}
+
 /* Where SETCMD has already been added, add the corresponding show
    command to LIST and return a pointer to the added command (not 
    necessarily the head of LIST).  */
@@ -1530,6 +1549,32 @@ complete_on_enum (const char *enumlist[],
   return matchlist;
 }
 
+static enum cmd_auto_boolean
+parse_auto_binary_operation (const char *arg)
+{
+  if (arg != NULL && *arg != '\0')
+    {
+      int length = strlen (arg);
+      while (isspace (arg[length - 1]) && length > 0)
+	length--;
+      if (strncmp (arg, "on", length) == 0
+	  || strncmp (arg, "1", length) == 0
+	  || strncmp (arg, "yes", length) == 0
+	  || strncmp (arg, "enable", length) == 0)
+	return CMD_AUTO_BOOLEAN_TRUE;
+      else if (strncmp (arg, "off", length) == 0
+	       || strncmp (arg, "0", length) == 0
+	       || strncmp (arg, "no", length) == 0
+	       || strncmp (arg, "disable", length) == 0)
+	return CMD_AUTO_BOOLEAN_FALSE;
+      else if (strncmp (arg, "auto", length) == 0
+	       || (strncmp (arg, "-1", length) == 0 && length > 1))
+	return CMD_AUTO_BOOLEAN_AUTO;
+    }
+  error ("\"on\", \"off\" or \"auto\" expected.");
+  return CMD_AUTO_BOOLEAN_AUTO; /* pacify GCC */
+}
+
 static int
 parse_binary_operation (arg)
      char *arg;
@@ -1544,13 +1589,15 @@ parse_binary_operation (arg)
   while (arg[length - 1] == ' ' || arg[length - 1] == '\t')
     length--;
 
-  if (!strncmp (arg, "on", length)
-      || !strncmp (arg, "1", length)
-      || !strncmp (arg, "yes", length))
+  if (strncmp (arg, "on", length) == 0
+      || strncmp (arg, "1", length) == 0
+      || strncmp (arg, "yes", length) == 0
+      || strncmp (arg, "enable", length) == 0)
     return 1;
-  else if (!strncmp (arg, "off", length)
-	   || !strncmp (arg, "0", length)
-	   || !strncmp (arg, "no", length))
+  else if (strncmp (arg, "off", length) == 0
+	   || strncmp (arg, "0", length) == 0
+	   || strncmp (arg, "no", length) == 0
+	   || strncmp (arg, "disable", length) == 0)
     return 0;
   else
     {
@@ -1635,6 +1682,9 @@ do_setshow_command (arg, from_tty, c)
 	case var_boolean:
 	  *(int *) c->var = parse_binary_operation (arg);
 	  break;
+	case var_auto_boolean:
+	  *(enum cmd_auto_boolean *) c->var = parse_auto_binary_operation (arg);
+	  break;
 	case var_uinteger:
 	  if (arg == NULL)
 	    error_no_arg ("integer to set it to.");
@@ -1760,6 +1810,23 @@ do_setshow_command (arg, from_tty, c)
 	case var_boolean:
 	  fputs_filtered (*(int *) c->var ? "on" : "off", stb->stream);
 	  break;
+	case var_auto_boolean:
+	  switch (*(enum auto_boolean*) c->var)
+	    {
+	    case CMD_AUTO_BOOLEAN_TRUE:
+	      fputs_filtered ("on", stb->stream);
+	      break;
+	    case CMD_AUTO_BOOLEAN_FALSE:
+	      fputs_filtered ("off", stb->stream);
+	      break;
+	    case CMD_AUTO_BOOLEAN_AUTO:
+	      fputs_filtered ("auto", stb->stream);
+	      break;
+	    default:
+	      internal_error ("do_setshow_command: invalid var_auto_boolean");
+	      break;
+	    }
+	  break;
 	case var_uinteger:
 	  if (*(unsigned int *) c->var == UINT_MAX)
 	    {
@@ -1813,6 +1880,23 @@ do_setshow_command (arg, from_tty, c)
 	case var_boolean:
 	  fputs_filtered (*(int *) c->var ? "on" : "off", gdb_stdout);
 	  break;
+	case var_auto_boolean:
+	  switch (*(enum cmd_auto_boolean*) c->var)
+	    {
+	    case CMD_AUTO_BOOLEAN_TRUE:
+	      fputs_filtered ("on", gdb_stdout);
+	      break;
+	    case CMD_AUTO_BOOLEAN_FALSE:
+	      fputs_filtered ("off", gdb_stdout);
+	      break;
+	    case CMD_AUTO_BOOLEAN_AUTO:
+	      fputs_filtered ("auto", gdb_stdout);
+	      break;
+	    default:
+	      internal_error ("do_setshow_command: invalid var_auto_boolean");
+	      break;
+	    }
+	  break;
 	case var_uinteger:
 	  if (*(unsigned int *) c->var == UINT_MAX)
 	    {