X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4c787a31df24b3bf184a4e109056a41d5712e5a7..7aaaad6c6dc0fae412d608dcf20a3977d8902cd1:/src/muscle-tab.c

diff --git a/src/muscle-tab.c b/src/muscle-tab.c
index c9168285..57050d05 100644
--- a/src/muscle-tab.c
+++ b/src/muscle-tab.c
@@ -50,7 +50,7 @@ hash_compare_muscles (void const *x, void const *y)
 {
   muscle_entry const *m1 = x;
   muscle_entry const *m2 = y;
-  return strcmp (m1->key, m2->key) == 0;
+  return STREQ (m1->key, m2->key);
 }
 
 static size_t
@@ -80,7 +80,7 @@ muscle_init (void)
   obstack_init (&muscle_obstack);
 
   muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
-				  hash_compare_muscles, muscle_entry_free);
+                                  hash_compare_muscles, muscle_entry_free);
 
   /* Version and input file.  */
   MUSCLE_INSERT_STRING ("version", VERSION);
@@ -179,7 +179,7 @@ muscle_syncline_grow (char const *key, location loc)
   char *extension = NULL;
   obstack_fgrow1 (&muscle_obstack, "]b4_syncline(%d, [[", loc.start.line);
   MUSCLE_OBSTACK_SGROW (&muscle_obstack,
-			quotearg_style (c_quoting_style, loc.start.file));
+                        quotearg_style (c_quoting_style, loc.start.file));
   obstack_sgrow (&muscle_obstack, "]])[");
   obstack_1grow (&muscle_obstack, 0);
   extension = obstack_finish (&muscle_obstack);
@@ -202,7 +202,7 @@ muscle_code_grow (const char *key, const char *val, location loc)
 
 
 void muscle_pair_list_grow (const char *muscle,
-			    const char *a1, const char *a2)
+                            const char *a1, const char *a2)
 {
   char *pair;
   obstack_sgrow (&muscle_obstack, "[[[");
@@ -388,25 +388,42 @@ muscle_user_name_list_grow (char const *key, char const *user_name,
   muscle_grow (key, "]]", "");
 }
 
+/** If the \a variable name is obsolete, return the name to use,
+ * otherwise \a variable. */
+static
+char const *
+muscle_percent_variable_update (char const *variable)
+{
+  typedef struct
+  {
+    const char *obsolete;
+    const char *updated;
+  } conversion_type;
+  const conversion_type conversion[] =
+    {
+      { "api.push_pull", "api.push-pull", },
+      { "lr.keep_unreachable_states", "lr.keep-unreachable-states", },
+      { "namespace", "api.namespace", },
+    };
+  int i;
+  for (i = 0; i < sizeof conversion / sizeof *conversion; ++i)
+    if (STREQ (conversion[i].obsolete, variable))
+      return conversion[i].updated;
+  return variable;
+}
+
 void
 muscle_percent_define_insert (char const *variable, location variable_loc,
                               char const *value,
                               muscle_percent_define_how how)
 {
-  char *variable_tr = NULL;
   char const *name;
   char const *loc_name;
   char const *syncline_name;
   char const *how_name;
 
   /* Permit certain names with underscores for backward compatibility.  */
-  if (0 == strcmp (variable, "api.push_pull")
-      || 0 == strcmp (variable, "lr.keep_unreachable_states"))
-    {
-      variable_tr = strdup (variable);
-      tr (variable_tr, '_', '-');
-      variable = variable_tr;
-    }
+  variable = muscle_percent_variable_update (variable);
 
   name = UNIQSTR_CONCAT ("percent_define(", variable, ")");
   loc_name = UNIQSTR_CONCAT ("percent_define_loc(", variable, ")");
@@ -421,10 +438,7 @@ muscle_percent_define_insert (char const *variable, location variable_loc,
       muscle_percent_define_how how_old =
         atoi (muscle_find_const (how_name));
       if (how_old == MUSCLE_PERCENT_DEFINE_F)
-        {
-          free (variable_tr);
-          return;
-        }
+        return;
       complain_at (variable_loc, _("%%define variable %s redefined"),
                    quote (variable));
       complain_at (muscle_percent_define_get_loc (variable),
@@ -439,8 +453,30 @@ muscle_percent_define_insert (char const *variable, location variable_loc,
   muscle_user_name_list_grow ("percent_define_user_variables", variable,
                               variable_loc);
   MUSCLE_INSERT_INT (how_name, how);
+}
+
+/* This is used for backward compatibility, e.g., "%define api.pure"
+   supersedes "%pure-parser".  */
+void
+muscle_percent_define_ensure (char const *variable, location loc,
+                              bool value)
+{
+  char const *val = value ? "" : "false";
+  char const *name;
+  name = UNIQSTR_CONCAT ("percent_define(", variable, ")");
 
-  free (variable_tr);
+  /* %pure-parser is deprecated in favor of `%define api.pure', so use
+     `%define api.pure' in a backward-compatible manner here.  First,
+     don't complain if %pure-parser is specified multiple times.  */
+  if (!muscle_find_const (name))
+    muscle_percent_define_insert (variable, loc, val,
+                                  MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+  /* In all cases, use api.pure now so that the backend doesn't complain if
+     the skeleton ignores api.pure, but do warn now if there's a previous
+     conflicting definition from an actual %define.  */
+  if (muscle_percent_define_flag_if (variable) != value)
+    muscle_percent_define_insert (variable, loc, val,
+                                  MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
 }
 
 char *
@@ -519,9 +555,9 @@ muscle_percent_define_flag_if (char const *variable)
   if (muscle_percent_define_ifdef (variable))
     {
       char *value = muscle_percent_define_get (variable);
-      if (value[0] == '\0' || 0 == strcmp (value, "true"))
+      if (value[0] == '\0' || STREQ (value, "true"))
         result = true;
-      else if (0 == strcmp (value, "false"))
+      else if (STREQ (value, "false"))
         result = false;
       else if (!muscle_find_const (invalid_boolean_name))
         {
@@ -578,7 +614,7 @@ muscle_percent_define_check_values (char const * const *values)
         {
           for (++values; *values; ++values)
             {
-              if (0 == strcmp (value, *values))
+              if (STREQ (value, *values))
                 break;
             }
           if (!*values)