* src/reader.c (reader): Remove calls to 'output_headers' and

'output_trailers'. Remove some C output.
(readgram): Disable a piece of code that was writing a default
definition for 'YYSTYPE'.
(reader_output_yylsp): Remove.
(packsymbols): Output token defintions to a macro.
(copy_definition): Disable C output.
* src/reader.c (parse_macro_decl): New function used to parse macro
declarations.
(copy_string2): Put the body of copy_string into this new function.
Add a parameter to let the caller choose whether he wants to copy the
string delimiters or not.
(copy_string): Be a simple call to copy_string2 with the last argument
bound to true.
(read_declarations): Add case for macro definition.
(copy_identifier): New.
(parse_macro_decl): Read macro identifiers using copy_identifier
rather than lex.

diff --git a/ChangeLog b/ChangeLog
index 8ee52b2d20cd21f5ed80dd122a682832a03f9dd6..55c9ed6f6f3bdc64ecc5307b7733faedea72ddd4 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,25 @@
+2001-08-25  Robert Anisko  <robert.anisko@epita.fr>
+
+       * src/reader.c (reader): Remove calls to 'output_headers' and
+       'output_trailers'. Remove some C output.
+       (readgram): Disable a piece of code that was writing a default
+       definition for 'YYSTYPE'.
+       (reader_output_yylsp): Remove.
+       (packsymbols): Output token defintions to a macro.
+       (copy_definition): Disable C output.
+       
+       * src/reader.c (parse_macro_decl): New function used to parse macro
+       declarations.
+       (copy_string2): Put the body of copy_string into this new function.
+       Add a parameter to let the caller choose whether he wants to copy the
+       string delimiters or not.
+       (copy_string): Be a simple call to copy_string2 with the last argument
+       bound to true.
+       (read_declarations): Add case for macro definition.
+       (copy_identifier): New.
+       (parse_macro_decl): Read macro identifiers using copy_identifier 
+       rather than lex.
+
 2001-08-25  Robert Anisko  <robert.anisko@epita.fr>
 
        * src/output.c (prepare): Add prefixed names.

diff --git a/src/reader.c b/src/reader.c
index 7e23c0ef94a6537c4554bc9b29928734e6635eda..cc8f90a0eea7bdfb72d21b6cc4d482bce1ca5171 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -34,6 +34,7 @@
 #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;
@@ -156,11 +157,12 @@ get_type_name (int n, symbol_list * rule)
 `------------------------------------------------------------*/
 
 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;
 
-  obstack_1grow (oout, match);
+  if (store)
+    obstack_1grow (oout, match);
 
   c = getc (fin);
 
@@ -192,9 +194,30 @@ copy_string (FILE *fin, struct obstack *oout, int match)
       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 |
@@ -403,9 +426,11 @@ copy_definition (void)
   /* -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));
+#endif
 
   after_percent = 0;
 
@@ -874,6 +899,51 @@ parse_thong_decl (void)
   nsyms--;
 }
 
+/* FIXME. */
+
+static void
+parse_macro_decl (void)
+{
+  int ch = ungetc (skip_white_space (), finput);
+  char* macro_key;
+  char* macro_value;
+  struct obstack macro_obstack;
+
+  obstack_init (&macro_obstack);
+
+  /* Read key. */
+  if (!isalpha (ch) && ch != '_')
+    {
+      complain (_("invalid %s declaration"), "%define");
+      skip_to_char ('%');
+      return;
+    }
+  copy_identifier (finput, &macro_obstack);
+  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_string (finput, &macro_obstack, '"');
+  macro_value = obstack_finish (&macro_obstack);
+
+  obstack_free (&macro_obstack, 0);
+
+  /* Store the (key, value) pair in the environment. */
+  macro_insert (macro_key, macro_value);
+}
+
 /*------------------------------------------.
 | Parse what comes after %header_extension. |
 `------------------------------------------*/
@@ -981,6 +1051,10 @@ read_declarations (void)
              parse_source_extension_decl ();
              break;
 
+           case tok_define:
+             parse_macro_decl ();
+             break;
+
            case tok_noop:
              break;
 
@@ -1564,6 +1638,7 @@ readgram (void)
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 
+#if 0 /* This code is in the skeleton now.  */
   /* JF put out same default YYSTYPE as YACC does */
   if (typed == 0
       && !value_components_used)
@@ -1579,6 +1654,7 @@ readgram (void)
 #  define YYSTYPE int\n\
 # endif\n");
     }
+#endif
 
   /* Report any undefined symbols and consider them nonterminals.  */
 
@@ -1641,7 +1717,7 @@ output_token_defines (struct obstack *oout)
        obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);
     }
 
-  obstack_1grow (oout, '\n');
+  /* obstack_1grow (oout, '\n'); */
 }
 
 
@@ -1763,8 +1839,12 @@ packsymbols (void)
 
   error_token_number = errtoken->value;
 
-  if (!no_parser_flag)
-    output_token_defines (&table_obstack);
+  output_token_defines (&output_obstack);
+  obstack_1grow (&output_obstack, 0);
+  macro_insert ("tokendef", obstack_finish (&output_obstack));
+
+  /* if (!no_parser_flag)
+     output_token_defines (&table_obstack); */
 
   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);
@@ -1913,10 +1993,12 @@ reader (void)
 
   /* 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 a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");
@@ -1926,30 +2008,22 @@ reader (void)
   /* 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");
+  /* obstack_1grow (&table_obstack, '\n'); */
+
   read_declarations ();
   /* Start writing the guard and action files, if they are needed.  */
-  output_headers ();
+  /* output_headers (); */
   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();
   /* Now we know whether we need the line-number stack.  If we do,
      write its type into the .tab.h file.  */
-  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");
+  /* output_trailers (); */
+  /* if (locations_flag)
+     obstack_sgrow (&table_obstack, "#define YYLSP_NEEDED 1\n\n"); */
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
@@ -1959,30 +2033,3 @@ reader (void)
      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");
-}