Update

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index fdd483aef6cf9ef2c0d18d8906134bca930402e5..49e5158e1e030ae34aa82dcef0676eb88151f040 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -34,6 +34,7 @@
 #include "output.h"
 #include "reader.h"
 #include "conflicts.h"
 #include "output.h"
 #include "reader.h"
 #include "conflicts.h"

+#include "macrotab.h"

 
 /* Number of slots allocated (but not necessarily used yet) in `rline'  */
 static int rline_allocated;
 
 /* Number of slots allocated (but not necessarily used yet) in `rline'  */
 static int rline_allocated;


@@ -156,11 +157,12 @@ get_type_name (int n, symbol_list * rule)
 `------------------------------------------------------------*/
 
 static inline void
 `------------------------------------------------------------*/
 
 static inline void

-copy_string (FILE *fin, struct obstack *oout, int match)
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)

 {
   int c;
 
 {
   int c;
 

-  obstack_1grow (oout, match);
+  if (store)
+    obstack_1grow (oout, match);

 
   c = getc (fin);
 
 
   c = getc (fin);
 


@@ -192,9 +194,30 @@ copy_string (FILE *fin, struct obstack *oout, int match)
       c = getc (fin);
     }
 
       c = getc (fin);
     }
 

-  obstack_1grow (oout, c);
+  if (store)
+    obstack_1grow (oout, c);

 }
 
 }
 

+/* FIXME. */
+
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+  copy_string2 (fin, oout, match, 1);
+}
+
+/* FIXME. */
+
+static inline void
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+  int c;
+
+  while (isalnum (c = getc (fin)) || c == '_')
+    obstack_1grow (oout, c);
+
+  ungetc (c, fin);
+}

 
 /*-----------------------------------------------------------------.
 | Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
 
 /*-----------------------------------------------------------------.
 | Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |


@@ -312,7 +335,6 @@ copy_at (FILE *fin, struct obstack *oout, int stack_offset)
   else if (isdigit (c) || c == '-')
     {
       int n;
   else if (isdigit (c) || c == '-')
     {
       int n;

-      char buf[4096];

 
       ungetc (c, fin);
       n = read_signed_integer (fin);
 
       ungetc (c, fin);
       n = read_signed_integer (fin);


@@ -344,7 +366,7 @@ copy_dollar (FILE *fin, struct obstack *oout,
             symbol_list *rule, int stack_offset)
 {
   int c = getc (fin);
             symbol_list *rule, int stack_offset)
 {
   int c = getc (fin);

-  char *type_name = NULL;
+  const char *type_name = NULL;

 
   /* Get the type name if explicit. */
   if (c == '<')
 
   /* Get the type name if explicit. */
   if (c == '<')


@@ -404,9 +426,11 @@ copy_definition (void)
   /* -1 while reading a character if prev char was %. */
   int after_percent;
 
   /* -1 while reading a character if prev char was %. */
   int after_percent;
 

+#if 0

   if (!no_lines_flag)
     obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
                    lineno, quotearg_style (c_quoting_style, infile));
   if (!no_lines_flag)
     obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
                    lineno, quotearg_style (c_quoting_style, infile));

+#endif

 
   after_percent = 0;
 
 
   after_percent = 0;
 


@@ -725,7 +749,8 @@ parse_union_decl (void)
 
   if (!no_lines_flag)
     obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",
 
   if (!no_lines_flag)
     obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",

-                   lineno, quotearg_style (c_quoting_style, infile));
+                   lineno, quotearg_style (c_quoting_style, 
+                                           macro_find("filename")));

   else
     obstack_1grow (&attrs_obstack, '\n');
 
   else
     obstack_1grow (&attrs_obstack, '\n');
 


@@ -875,6 +900,88 @@ parse_thong_decl (void)
   nsyms--;
 }
 
   nsyms--;
 }
 

+/* FIXME. */
+
+static void
+parse_macro_decl (void)
+{
+  int ch = ungetc (skip_white_space (), finput);
+  char* macro_key;
+  char* macro_value;
+
+  /* Read key. */
+  if (!isalpha (ch) && ch != '_')
+    {
+      complain (_("invalid %s declaration"), "%define");
+      skip_to_char ('%');
+      return;
+    }
+  copy_identifier (finput, &macro_obstack);
+  obstack_1grow (&macro_obstack, 0);
+  macro_key = obstack_finish (&macro_obstack);
+  
+  /* Read value. */
+  ch = skip_white_space ();
+  if (ch != '"')
+    {
+      ungetc (ch, finput);
+      if (ch != EOF)
+       {
+         complain (_("invalid %s declaration"), "%define");
+         skip_to_char ('%');
+         return;
+       }
+      else
+       fatal (_("Premature EOF after %s"), "\"");
+    }
+  copy_string2 (finput, &macro_obstack, '"', 0);
+  obstack_1grow (&macro_obstack, 0);
+  macro_value = obstack_finish (&macro_obstack);
+
+  /* Store the (key, value) pair in the environment. */
+  macro_insert (macro_key, macro_value);
+}
+
+
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/
+
+void
+parse_skel_decl (void)
+{
+  /* Complete with parse_dquoted_param () on the CVS branch 1.29.  */
+}
+
+/*------------------------------------------.
+| Parse what comes after %header_extension. |
+`------------------------------------------*/
+
+static void
+parse_header_extension_decl (void)
+{
+  char buff[32];
+
+  if (header_extension)
+    complain (_("multiple %%header_extension declarations"));
+  fscanf (finput, "%s", buff);
+  header_extension = xstrdup (buff);
+}
+
+/*------------------------------------------.
+| Parse what comes after %source_extension. |
+`------------------------------------------*/
+
+static void
+parse_source_extension_decl (void)
+{
+  char buff[32];
+
+  if (src_extension)
+    complain (_("multiple %%source_extension declarations"));
+  fscanf (finput, "%s", buff);
+  src_extension = xstrdup (buff);
+}

 
 /*----------------------------------------------------------------.
 | Read from finput until `%%' is seen.  Discard the `%%'.  Handle |
 
 /*----------------------------------------------------------------.
 | Read from finput until `%%' is seen.  Discard the `%%'.  Handle |


@@ -945,6 +1052,22 @@ read_declarations (void)
              parse_assoc_decl (non_assoc);
              break;
 
              parse_assoc_decl (non_assoc);
              break;
 

+           case tok_hdrext:
+             parse_header_extension_decl ();
+             break;
+
+           case tok_srcext:
+             parse_source_extension_decl ();
+             break;
+
+           case tok_define:
+             parse_macro_decl ();
+             break;
+             
+           case tok_skel:
+             parse_skel_decl ();
+             break;
+

            case tok_noop:
              break;
 
            case tok_noop:
              break;
 


@@ -989,7 +1112,8 @@ copy_action (symbol_list *rule, int stack_offset)
   if (!no_lines_flag)
     {
       sprintf (buf, "#line %d %s\n",
   if (!no_lines_flag)
     {
       sprintf (buf, "#line %d %s\n",

-              lineno, quotearg_style (c_quoting_style, infile));
+              lineno, quotearg_style (c_quoting_style, 
+                                      macro_find ("filename")));

       obstack_grow (&action_obstack, buf, strlen (buf));
     }
   obstack_1grow (&action_obstack, '{');
       obstack_grow (&action_obstack, buf, strlen (buf));
     }
   obstack_1grow (&action_obstack, '{');


@@ -1077,7 +1201,8 @@ copy_guard (symbol_list *rule, int stack_offset)
   obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
   if (!no_lines_flag)
     obstack_fgrow2 (&guard_obstack, "#line %d %s\n",
   obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
   if (!no_lines_flag)
     obstack_fgrow2 (&guard_obstack, "#line %d %s\n",

-                   lineno, quotearg_style (c_quoting_style, infile));
+                   lineno, quotearg_style (c_quoting_style,
+                                           macro_find ("filename")));

   obstack_1grow (&guard_obstack, '{');
 
   count = 0;
   obstack_1grow (&guard_obstack, '{');
 
   count = 0;


@@ -1515,7 +1640,7 @@ readgram (void)
 
       else
        {
 
       else
        {

-         complain (_("invalid input: %s"), token_buffer);
+         complain (_("invalid input: %s"), quote (token_buffer));

          t = lex ();
        }
     }
          t = lex ();
        }
     }


@@ -1528,22 +1653,6 @@ readgram (void)
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 

-  /* JF put out same default YYSTYPE as YACC does */
-  if (typed == 0
-      && !value_components_used)
-    {
-      /* We used to use `unsigned long' as YYSTYPE on MSDOS,
-         but it seems better to be consistent.
-         Most programs should declare their own type anyway.  */
-      obstack_sgrow (&attrs_obstack,
-                          "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
-      if (defines_flag)
-       obstack_sgrow (&defines_obstack, "\
-#ifndef YYSTYPE\n\
-# define YYSTYPE int\n\
-#endif\n");
-    }
-

   /* Report any undefined symbols and consider them nonterminals.  */
 
   for (bp = firstsymbol; bp; bp = bp->next)
   /* Report any undefined symbols and consider them nonterminals.  */
 
   for (bp = firstsymbol; bp; bp = bp->next)


@@ -1558,6 +1667,25 @@ readgram (void)
 
   ntokens = nsyms - nvars;
 }
 
   ntokens = nsyms - nvars;
 }

+
+/* At the end of the grammar file, some C source code must
+   be stored. It is going to be associated to the epilogue
+   directive.  */
+static void
+read_additionnal_code (void)
+{
+  char c;
+  struct obstack el_obstack;
+  
+  obstack_init (&el_obstack);
+
+  while ((c = getc (finput)) != EOF)
+    obstack_1grow (&el_obstack, c);
+  
+  obstack_1grow (&el_obstack, 0);
+  macro_insert ("epilogue", obstack_finish (&el_obstack));
+}
+

 \f
 /*--------------------------------------------------------------.
 | For named tokens, but not literal ones, define the name.  The |
 \f
 /*--------------------------------------------------------------.
 | For named tokens, but not literal ones, define the name.  The |


@@ -1598,15 +1726,12 @@ output_token_defines (struct obstack *oout)
       if (c != '\0')
        continue;
 
       if (c != '\0')
        continue;
 

-      obstack_fgrow2 (oout, "#define\t%s\t%d\n",
+      obstack_fgrow2 (oout, "# define\t%s\t%d\n",

                      symbol,
                      symbol,

-                     ((translations && !raw_flag)
-                      ? bp->user_token_number : bp->value));
+                     (translations ? bp->user_token_number : bp->value));

       if (semantic_parser)
       if (semantic_parser)

-       obstack_fgrow2 (oout, "#define\tT%s\t%d\n", symbol, bp->value);
+       obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);

     }
     }

-
-  obstack_1grow (oout, '\n');

 }
 
 
 }
 
 


@@ -1625,8 +1750,6 @@ packsymbols (void)
   int last_user_token_number;
   static char DOLLAR[] = "$";
 
   int last_user_token_number;
   static char DOLLAR[] = "$";
 

-  /* int lossage = 0; JF set but not used */
-

   tags = XCALLOC (char *, nsyms + 1);
   tags[0] = DOLLAR;
   user_toknums = XCALLOC (short, nsyms + 1);
   tags = XCALLOC (char *, nsyms + 1);
   tags[0] = DOLLAR;
   user_toknums = XCALLOC (short, nsyms + 1);


@@ -1728,8 +1851,14 @@ packsymbols (void)
 
   error_token_number = errtoken->value;
 
 
   error_token_number = errtoken->value;
 

+  output_token_defines (&output_obstack);
+  obstack_1grow (&output_obstack, 0);
+  macro_insert ("tokendef", obstack_finish (&output_obstack));
+
+#if 0

   if (!no_parser_flag)
     output_token_defines (&table_obstack);
   if (!no_parser_flag)
     output_token_defines (&table_obstack);

+#endif

 
   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);
 
   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);


@@ -1758,7 +1887,7 @@ packsymbols (void)
            /* don't make these for dummy nonterminals made by gensym.  */
            if (*tags[i] != '@')
               obstack_fgrow2 (&defines_obstack,
            /* don't make these for dummy nonterminals made by gensym.  */
            if (*tags[i] != '@')
               obstack_fgrow2 (&defines_obstack,

-                              "#define\tNT%s\t%d\n", tags[i], i);
+                              "# define\tNT%s\t%d\n", tags[i], i);

          }
 #if 0
       /* `fdefines' is now a temporary file, so we need to copy its
          }
 #if 0
       /* `fdefines' is now a temporary file, so we need to copy its


@@ -1876,12 +2005,17 @@ reader (void)
   init_lex ();
   lineno = 1;
 
   init_lex ();
   lineno = 1;
 

+  /* Initialize the macro obstack.  */
+  obstack_init (&macro_obstack);
+

   /* Initialize the symbol table.  */
   tabinit ();
   /* Initialize the symbol table.  */
   tabinit ();

+

   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   errtoken->user_token_number = 256;   /* Value specified by POSIX.  */
   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   errtoken->user_token_number = 256;   /* Value specified by POSIX.  */

+

   /* Construct a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");
   /* Construct a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");


@@ -1891,30 +2025,18 @@ reader (void)
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */

-  obstack_1grow (&table_obstack, '\n');
-  obstack_fgrow3 (&table_obstack, "\
-/* %s, made from %s\n\
-   by GNU bison %s.  */\n\
-\n",
-                 no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
-                 infile, VERSION);
-
-  obstack_sgrow (&table_obstack,
-                      "#define YYBISON 1  /* Identify Bison output.  */\n\n");

   read_declarations ();
   read_declarations ();

-  /* Start writing the guard and action files, if they are needed.  */
-  output_headers ();

   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();
   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();

+  /* Some C code is given at the end of the grammar file. */
+  read_additionnal_code ();

   /* Now we know whether we need the line-number stack.  If we do,
      write its type into the .tab.h file.  */
   /* Now we know whether we need the line-number stack.  If we do,
      write its type into the .tab.h file.  */

+#if 0

   if (defines_flag)
     reader_output_yylsp (&defines_obstack);
   if (defines_flag)
     reader_output_yylsp (&defines_obstack);

-  /* Write closing delimiters for actions and guards.  */
-  output_trailers ();
-  if (locations_flag)
-    obstack_sgrow (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
+#endif

   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();


@@ -1924,30 +2046,3 @@ reader (void)
      referred to by symbol number.  */
   free_symtab ();
 }
      referred to by symbol number.  */
   free_symtab ();
 }

-
-
-/*------------------------------------------------------------------.
-| Define YYLTYPE.  Cannot be in the skeleton since we might have to |
-| output it in the headers if --defines is used.                    |
-`------------------------------------------------------------------*/
-
-void
-reader_output_yylsp (struct obstack *oout)
-{
-  if (locations_flag)
-    obstack_sgrow (oout, "\
-\n\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
-  int first_line;\n\
-  int first_column;\n\
-\n\
-  int last_line;\n\
-  int last_column;\n\
-} yyltype;\n\
-\n\
-# define YYLTYPE yyltype\n\
-#endif\n\
-\n");
-}