* src/files.c (output_files): Free the output_obstack.

[bison.git] / src / output.c

diff --git a/src/output.c b/src/output.c
index f38d63bae36c7ee9601e3024292c3f4dcbfe965e..841ebe4f3780ec728f52920f437e27ad88a93f45 100644 (file)
--- a/src/output.c
+++ b/src/output.c
@@ -91,7 +91,6 @@
 */
 
 #include "system.h"
-#include "obstack.h"
 #include "quotearg.h"
 #include "getargs.h"
 #include "files.h"
@@ -126,6 +125,23 @@ struct obstack output_obstack;
 
 int error_verbose = 0;
 
+/* Returns the number of lines of S.  */
+static size_t
+get_lines_number (const char *s)
+{
+  size_t lines = 0;
+  
+  size_t i;
+  for (i = 0; s[i]; ++i)
+    {
+      if (s[i] == '\n')
+       ++lines;
+    }   
+  
+  return lines;
+}
+
+
 /* FIXME. */
 
 static inline void
@@ -198,6 +214,11 @@ output_gram (void)
 
     XFREE (yyrhs);
   }
+  
+#if 0
+  if (!semantic_parser)
+    obstack_sgrow (&table_obstack, "\n#endif\n");
+#endif
 }
 
 
@@ -285,8 +306,6 @@ output_rule_data (void)
                     0, 1, nrules + 1);
   muscle_insert ("r2", obstack_finish (&output_obstack));
   XFREE (short_tab);
-
-  XFREE (rule_table + 1);
 }
 
 /*------------------------------------------------------------------.
@@ -512,6 +531,42 @@ token_actions (void)
 }
 
 
+/*-----------------------------.
+| Output the actions to OOUT.  |
+`-----------------------------*/
+
+static void
+actions_output (FILE *out, size_t *line)
+{
+  int rule;
+  for (rule = 1; rule < nrules + 1; ++rule)
+    if (rule_table[rule].action)
+      {
+       fprintf (out, "  case %d:\n", rule);
+
+       if (!no_lines_flag)
+         fprintf (out, muscle_find ("linef"),
+                  rule_table[rule].action_line,
+                  quotearg_style (c_quoting_style,
+                                  muscle_find ("filename")));
+       /* As a Bison extension, add the ending semicolon.  Since some
+          Yacc don't do that, help people using bison as a Yacc
+          finding their missing semicolons.  */
+       fprintf (out, "{ %s%s }\n    break;\n\n",
+                rule_table[rule].action,
+                yacc_flag ? ";" : "");
+
+       /* We always output 4 '\n' per action.  */
+       *line += 4;
+       /* Plus one if !no_lines_flag.  */
+       if (!no_lines_flag)
+         ++*line;
+       /* Get the number of lines written by the user.  */
+       *line += get_lines_number (rule_table[rule].action);
+      }
+}
+
+
 static void
 save_column (int symbol, int default_state)
 {
@@ -898,7 +953,7 @@ output_actions (void)
 `------------------------------------------------------------*/
 
 static void
-output_parser (const char *skel_filename, struct obstack *oout)
+output_parser (const char *skel_filename, FILE *out)
 {
   int c;
   FILE *fskel;
@@ -915,7 +970,7 @@ output_parser (const char *skel_filename, struct obstack *oout)
        {
          if (c == '\n')
            ++line;
-         obstack_1grow (oout, c);
+         putc (c, out);
          c = getc (fskel);
        }
       else if ((c = getc (fskel)) == '%')
@@ -931,18 +986,23 @@ output_parser (const char *skel_filename, struct obstack *oout)
          /* Output the right value, or see if it's something special.  */
          muscle_key = obstack_finish (&muscle_obstack);
          muscle_value = muscle_find (muscle_key);
-         if (muscle_value)
-           obstack_sgrow (oout, muscle_value);
+         if (!strcmp (muscle_key, "actions"))
+           actions_output (out, &line);
          else if (!strcmp (muscle_key, "line"))
-           obstack_fgrow1 (oout, "%d", line + 1);
+           fprintf (out, "%d", line);
+         else if (muscle_value)
+           {
+             fputs (muscle_value, out);
+             line += get_lines_number (muscle_value);
+           }     
          else
            {
-             obstack_sgrow (oout, "%%");
-             obstack_sgrow (oout, muscle_key);
+             fputs ("%%", out);
+             fputs (muscle_key, out);
            }
        }
       else
-       obstack_1grow (oout, '%');
+       putc ('%', out);
     }
 
   /* End.  */
@@ -956,6 +1016,7 @@ output_parser (const char *skel_filename, struct obstack *oout)
 static void
 output_master_parser (void)
 {
+  FILE *parser = xfopen (parser_file_name, "w");
   if (!skeleton)
     {
       if (semantic_parser)
@@ -964,7 +1025,10 @@ output_master_parser (void)
        skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE);
     }
   muscle_insert ("skeleton", skeleton);
-  output_parser (skeleton, &table_obstack);
+  muscle_insert ("parser-file-name", parser_file_name);
+
+  output_parser (skeleton, parser);
+  xfclose (parser);
 }
 
 
@@ -1011,13 +1075,50 @@ prepare (void)
   MUSCLE_INSERT_INT ("ntokens", ntokens);
 
   MUSCLE_INSERT_INT ("locations-flag", locations_flag);
+}
 
-  /* We need to save the actions in the muscle %%action.  */
-  obstack_1grow (&action_obstack, 0);
-  muscle_insert ("action", obstack_finish (&action_obstack));
 
+/*-------------------------.
+| Output the header file.  |
+`-------------------------*/
+
+static void
+header_output (void)
+{
+  FILE *out = xfopen (spec_defines_file, "w");
+  char *macro_name = compute_header_macro ();
+
+  fprintf (out, "#ifndef %s\n", macro_name);
+  fprintf (out, "# define %s\n\n", macro_name);
+
+  fputs (muscle_find ("tokendef"), out);
+  fprintf (out, "\
+#ifndef YYSTYPE\n\
+typedef %s
+yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n",
+                   muscle_find ("stype"));
+
+  if (!pure_parser)
+    fprintf (out, "\nextern YYSTYPE %slval;\n",
+            spec_name_prefix);
+  if (semantic_parser)
+    {
+      int i;
+
+      for (i = ntokens; i < nsyms; i++)
+       /* don't make these for dummy nonterminals made by gensym.  */
+       if (*tags[i] != '@')
+         fprintf (out, "# define\tNT%s\t%d\n", tags[i], i);
+    }
+
+  fprintf (out, "\n#endif /* not %s */\n", macro_name);
+  free (macro_name);
+  xfclose (out);
 }
 
+
 /*----------------------------------------------------------.
 | Output the parsing tables and the parser code to ftable.  |
 `----------------------------------------------------------*/
@@ -1042,8 +1143,13 @@ output (void)
   obstack_1grow (&attrs_obstack, 0);
   muscle_insert ("prologue", obstack_finish (&attrs_obstack));
 
+  /* Output the parser. */
   output_master_parser ();
+  /* Output the header if needed. */
+  if (defines_flag)
+    header_output ();
 
+  free (rule_table + 1);
   obstack_free (&muscle_obstack, 0);
   obstack_free (&output_obstack, 0);
   obstack_free (&action_obstack, 0);