Implement no-XXX arguments for --warnings, --report, --trace.

[bison.git] / src / getargs.c

diff --git a/src/getargs.c b/src/getargs.c
index 2408550c2eeaf888b5f65feaf814f3e2ef5bc4c8..d65cfc0941ab8d65d9906b7260e1f04de6c3bc41 100644 (file)
--- a/src/getargs.c
+++ b/src/getargs.c
@@ -87,10 +87,12 @@ char *program_name;
  *  \param keys     array of valid subarguments.
  *  \param values   array of corresponding (int) values.
  *  \param flags    the flags to update
  *  \param keys     array of valid subarguments.
  *  \param values   array of corresponding (int) values.
  *  \param flags    the flags to update

- *  \param args     colon separated list of effective subarguments to decode.
+ *  \param args     comma separated list of effective subarguments to decode.

  *                  If 0, then activate all the flags.
  *
  *                  If 0, then activate all the flags.
  *

- *  The special value 0 resets the flags to 0.
+ *  If VALUE != 0 then KEY sets flags and no-KEY clears them.
+ *  If VALUE == 0 then KEY clears all flags and no-KEY sets all flags.
+ *  Thus no-none = all and no-all = none.

  */
 static void
 flags_argmatch (const char *option,
  */
 static void
 flags_argmatch (const char *option,


@@ -102,11 +104,18 @@ flags_argmatch (const char *option,
       args = strtok (args, ",");
       while (args)
        {
       args = strtok (args, ",");
       while (args)
        {

-         int value = XARGMATCH (option, args, keys, values);
+         int no = strncmp (args, "no-", 3) == 0 ? 3 : 0;
+         int value = XARGMATCH (option, args + no, keys, values);

          if (value == 0)
          if (value == 0)

-           *flags = 0;
+           if (no)
+             *flags = ~0;
+           else
+             *flags = 0;

          else
          else

-           *flags |= value;
+           if (no)
+             *flags &= ~value;
+           else
+             *flags |= value;

          args = strtok (NULL, ",");
        }
     }
          args = strtok (NULL, ",");
        }
     }