Rearrange initialization of the parser state variables so that the

[bison.git] / src / getargs.c

diff --git a/src/getargs.c b/src/getargs.c
index 94d24329d716cdd0ea167be3135f96f30a20a2ec..7e7d8a93c9e4686d896068512726f4ad2a1923d9 100644 (file)
--- a/src/getargs.c
+++ b/src/getargs.c
@@ -66,18 +66,27 @@ int report_flag = report_none;
 int trace_flag = trace_none;
 int warnings_flag = warnings_none;
 
+static struct bison_language const valid_languages[] = {
+  { "c", "c-skel.m4", ".c", ".h", true },
+  { "c++", "c++-skel.m4", ".cc", ".hh", true },
+  { "", "", "", "", false }
+};
+
+static int skeleton_prio = 2;
 const char *skeleton = NULL;
+static int language_prio = 2;
+struct bison_language const *language = &valid_languages[0];
 const char *include = NULL;
 
-extern char *program_name;
+char *program_name;
 
 
 /** Decode an option's set of keys.
  *
  *  \param option   option being decoded.
- *  \paran keys     array of valid subarguments.
+ *  \param keys     array of valid subarguments.
  *  \param values   array of corresponding (int) values.
- *  \param flag     the flags to update
+ *  \param flags    the flags to update
  *  \param args     colon separated list of effective subarguments to decode.
  *                  If 0, then activate all the flags.
  *
@@ -98,7 +107,7 @@ flags_argmatch (const char *option,
            *flags = 0;
          else
            *flags |= value;
-          args = strtok (NULL, ",");
+         args = strtok (NULL, ",");
        }
     }
   else
@@ -108,7 +117,7 @@ flags_argmatch (const char *option,
 /** Decode a set of sub arguments.
  *
  *  \param FlagName  the flag familly to update.
- *  \param args      the effective sub arguments to decode.
+ *  \param Args      the effective sub arguments to decode.
  *
  *  \arg FlagName_args   the list of keys.
  *  \arg FlagName_types  the list of values.
@@ -203,19 +212,21 @@ static const char * const warnings_args[] =
 {
   /* In a series of synonyms, present the most meaningful first, so
      that argmatch_valid be more readable.  */
-  "none       - no warnings",
-  "error      - warnings are errors",
-  "yacc       - incompatibilities with POSIX YACC",
-  "all        - all of the above",
+  "none            - no warnings",
+  "midrule-values  - unset or unused midrule values",
+  "yacc            - incompatibilities with POSIX YACC",
+  "all             - all of the above",
+  "error           - warnings are errors",
   0
 };
 
 static const int warnings_types[] =
 {
   warnings_none,
-  warnings_error,
+  warnings_midrule_values,
   warnings_yacc,
-  warnings_all
+  warnings_all,
+  warnings_error
 };
 
 ARGMATCH_VERIFY (warnings_args, warnings_types);
@@ -321,12 +332,63 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 }
 
 
+/*-------------------------------------.
+| --skeleton and --language handling.  |
+`--------------------------------------*/
+
+void
+skeleton_arg (char const *arg, int prio, location const *loc)
+{
+  if (prio < skeleton_prio)
+    {
+      skeleton_prio = prio;
+      skeleton = arg;
+    }
+  else if (prio == skeleton_prio)
+    {
+      char const *msg =
+       _("multiple skeleton declarations are invalid");
+      if (loc)
+       complain_at (*loc, msg);
+      else
+       complain (msg);
+    }
+}
+
+void
+language_argmatch (char const *arg, int prio, location const *loc)
+{
+  char const *msg;
+
+  if (prio < language_prio)
+    {
+      int i;
+      for (i = 0; valid_languages[i].language[0]; i++)
+       if (strcasecmp (arg, valid_languages[i].language) == 0)
+         {
+           language_prio = prio;
+           language = &valid_languages[i];
+           return;
+         }
+      msg = _("invalid language `%s'");
+    }
+  else if (language_prio == prio)
+    msg = _("multiple language declarations are invalid");
+  else
+    return;
+
+  if (loc)
+    complain_at (*loc, msg, arg);
+  else
+    complain (msg, arg);
+}
+
 /*----------------------.
 | Process the options.  |
 `----------------------*/
 
 /* Shorts options.  */
-static char const short_options[] = "yvegdhr:ltknVo:b:p:S:T::W";
+static char const short_options[] = "yvegdhr:L:ltknVo:b:p:S:T::W";
 
 /* Values for long options that do not have single-letter equivalents.  */
 enum
@@ -372,6 +434,7 @@ static struct option const long_options[] =
   { "no-parser",      no_argument,               0,   'n' },
   { "raw",            no_argument,               0,     0 },
   { "skeleton",       required_argument,         0,   'S' },
+  { "language",       required_argument,         0,   'L' },
   { "token-table",    no_argument,               0,   'k' },
 
   {0, 0, 0, 0}
@@ -406,14 +469,18 @@ getargs (int argc, char *argv[])
        /* Here, the -g and --graph=FILE options are differentiated.  */
        graph_flag = true;
        if (optarg)
-         spec_graph_file = AS_FILE_NAME (optarg);
+         spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
        break;
 
       case 'h':
        usage (EXIT_SUCCESS);
 
+      case 'L':
+       language_argmatch (optarg, 0, NULL);
+       break;
+
       case 'S':
-       skeleton = AS_FILE_NAME (optarg);
+       skeleton_arg (AS_FILE_NAME (optarg), 0, NULL);
        break;
 
       case 'I':
@@ -424,7 +491,7 @@ getargs (int argc, char *argv[])
        /* Here, the -d and --defines options are differentiated.  */
        defines_flag = true;
        if (optarg)
-         spec_defines_file = AS_FILE_NAME (optarg);
+         spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
        break;
 
       case 'k':
@@ -472,7 +539,10 @@ getargs (int argc, char *argv[])
        break;
 
       case 'W':
-       FLAGS_ARGMATCH (warnings, optarg);
+       if (optarg)
+         FLAGS_ARGMATCH (warnings, optarg);
+       else
+         warnings_flag |= warnings_all;
        break;
 
       case LOCATIONS_OPTION: