/* Output the generated parsing program for bison,
- Copyright 1984, 1986, 1989, 1992, 2000, 2001
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "system.h"
#include "quotearg.h"
+#include "error.h"
#include "getargs.h"
#include "files.h"
#include "gram.h"
#include "conflicts.h"
#include "muscle_tab.h"
+/* From lib/readpipe.h. */
+FILE *readpipe PARAMS ((const char *, ...));
+
+/* From src/scan-skel.l. */
+int skel_lex PARAMS ((void));
+extern FILE *skel_in;
static int nvectors;
static int nentries;
int error_verbose = 0;
/* Returns the number of lines of S. */
-static size_t
+size_t
get_lines_number (const char *s)
{
size_t lines = 0;
| Output the actions to OOUT. |
`-----------------------------*/
-static void
-actions_output (FILE *out, size_t *line)
+void
+actions_output (FILE *out)
{
int rule;
for (rule = 1; rule < nrules + 1; ++rule)
fprintf (out, "{ %s%s }\n break;\n\n",
rules[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 (rules[rule].action);
}
}
| Output the guards to OOUT. |
`----------------------------*/
-static void
-guards_output (FILE *out, size_t *line)
+void
+guards_output (FILE *out)
{
int rule;
for (rule = 1; rule < nrules + 1; ++rule)
- if (rules[rule].action)
+ if (rules[rule].guard)
{
fprintf (out, " case %d:\n", rule);
muscle_find ("filename")));
fprintf (out, "{ %s; }\n break;\n\n",
rules[rule].guard);
-
- /* 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 (rules[rule].guard);
}
}
| Output the tokens definition to OOUT. |
`---------------------------------------*/
-static void
-token_definitions_output (FILE *out, size_t *line)
+void
+token_definitions_output (FILE *out)
{
int i;
for (i = 0; i < ntokens; ++i)
fprintf (out, "# define %s\t%d\n",
symbol->tag, number);
- ++*line;
if (semantic_parser)
- {
- /* FIXME: This is probably wrong, and should be just as
- above. --akim. */
- fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->value);
- ++*line;
- }
+ /* FIXME: This is probably wrong, and should be just as
+ above. --akim. */
+ fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->value);
}
}
}
\f
-/*------------------------------------------------------------.
-| Copy the parser code from SKEL_FILENAME into OOUT obstack. |
-| and do the muscle substitution. |
-`------------------------------------------------------------*/
-
-static void
-output_parser (const char *skel_filename, FILE *out)
-{
- int c;
- FILE *fskel;
- size_t output_line;
- size_t skeleton_line;
-
- fskel = xfopen (skel_filename, "r");
-
- /* New output code. */
- output_line = 1;
- skeleton_line = 1;
- c = getc (fskel);
- while (c != EOF)
- {
- if (c != '%')
- {
- if (c == '\n')
- {
- ++output_line;
- ++skeleton_line;
- }
- putc (c, out);
- c = getc (fskel);
- }
- else if ((c = getc (fskel)) == '%')
- {
- /* Read the muscle. */
- const char *muscle_key = 0;
- const char *muscle_value = 0;
-
- while (isalnum (c = getc (fskel)) || c == '-')
- obstack_1grow (&muscle_obstack, c);
- obstack_1grow (&muscle_obstack, 0);
-
- /* Output the right value, or see if it's something special. */
- muscle_key = obstack_finish (&muscle_obstack);
- muscle_value = muscle_find (muscle_key);
- if (!strcmp (muscle_key, "actions"))
- actions_output (out, &output_line);
- else if (!strcmp (muscle_key, "guards"))
- guards_output (out, &output_line);
- else if (!strcmp (muscle_key, "line"))
- fprintf (out, "%d", output_line);
- else if (!strcmp (muscle_key, "tokendef"))
- token_definitions_output (out, &output_line);
- else if (!strcmp (muscle_key, "skeleton-line"))
- fprintf (out, "%d", skeleton_line);
- else if (muscle_value)
- {
- fputs (muscle_value, out);
- output_line += get_lines_number (muscle_value);
- }
- else
- {
- fputs ("%%", out);
- fputs (muscle_key, out);
- }
- }
- else
- putc ('%', out);
- }
-
- /* End. */
- xfclose (fskel);
-}
-
-/*----------------------------------------.
-| Prepare the master parser to be output |
-`----------------------------------------*/
+/*---------------------------.
+| Call the skeleton parser. |
+`---------------------------*/
static void
-output_master_parser (void)
+output_skeleton (void)
{
- FILE *parser = xfopen (parser_file_name, "w");
+ /* Find the right skeleton file. */
if (!skeleton)
{
if (semantic_parser)
- skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY);
+ skeleton = "bison.hairy";
else
- skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE);
+ skeleton = "bison.simple";
}
+
+ /* Parse the skeleton file and output the needed parsers. */
muscle_insert ("skeleton", skeleton);
- muscle_insert ("parser-file-name", parser_file_name);
- output_parser (skeleton, parser);
- xfclose (parser);
-}
+ /* Store the definition of all the muscles. */
+ {
+ FILE *muscles_m4 = xfopen ("/tmp/muscles.m4", "w");
+ /* There are no comments, especially not `#': we do want M4 expansion
+ after `#': think of CPP macros! */
+ fprintf (muscles_m4, "m4_changecom()\n");
+ fprintf (muscles_m4, "m4_init()\n");
+ fprintf (muscles_m4, "m4_define([b4_actions], \n[[");
+ actions_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
-/* FIXME. */
+ fprintf (muscles_m4, "m4_define([b4_guards], \n[[");
+ guards_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
-#define MUSCLE_INSERT_INT(Key, Value) \
-{ \
- obstack_fgrow1 (&muscle_obstack, "%d", Value); \
- obstack_1grow (&muscle_obstack, 0); \
- muscle_insert (Key, obstack_finish (&muscle_obstack)); \
-}
+ fprintf (muscles_m4, "m4_define([b4_tokendef], \n[[");
+ token_definitions_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
-#define MUSCLE_INSERT_STRING(Key, Value) \
-{ \
- obstack_sgrow (&muscle_obstack, Value); \
- obstack_1grow (&muscle_obstack, 0); \
- muscle_insert (Key, obstack_finish (&muscle_obstack)); \
-}
+ muscles_m4_output (muscles_m4);
+
+ fprintf (muscles_m4, "m4_wrap([m4_divert_pop(0)])\n");
+ fprintf (muscles_m4, "m4_divert_push(0)dnl\n");
+ xfclose (muscles_m4);
+ }
-#define MUSCLE_INSERT_PREFIX(Key, Value) \
-{ \
- obstack_fgrow2 (&muscle_obstack, "%s%s", spec_name_prefix, Value); \
- obstack_1grow (&muscle_obstack, 0); \
- muscle_insert (Key, obstack_finish (&muscle_obstack)); \
+ /* Invoke m4 on the definition of the muscles, and the skeleton. */
+ {
+ const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
+ if (!bison_pkgdatadir)
+ bison_pkgdatadir = PKGDATADIR;
+ skel_in = readpipe ("m4",
+ "-I",
+ bison_pkgdatadir,
+ "m4sugar/m4sugar.m4",
+ "/tmp/muscles.m4",
+ skeleton,
+ NULL);
+ if (!skel_in)
+ error (EXIT_FAILURE, errno, "cannot run m4");
+ skel_lex ();
+ }
}
static void
MUSCLE_INSERT_INT ("debug", debug_flag);
MUSCLE_INSERT_INT ("final", final_state);
MUSCLE_INSERT_INT ("maxtok", max_user_token_number);
- MUSCLE_INSERT_INT ("error-verbose", error_verbose);
- MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
+ MUSCLE_INSERT_INT ("error_verbose", error_verbose);
+ MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
+
+ /* FIXME: This is wrong: the muscles should decide whether they hold
+ a copy or not, but the situation is too obscure currently. */
+ MUSCLE_INSERT_STRING ("output_infix", output_infix ? output_infix : "");
+ MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
+ MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
+ MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);
MUSCLE_INSERT_INT ("nnts", nvars);
MUSCLE_INSERT_INT ("nrules", nrules);
MUSCLE_INSERT_INT ("nstates", nstates);
MUSCLE_INSERT_INT ("ntokens", ntokens);
- MUSCLE_INSERT_INT ("locations-flag", locations_flag);
+ MUSCLE_INSERT_INT ("locations_flag", locations_flag);
+ MUSCLE_INSERT_INT ("defines_flag", defines_flag);
}
-
/*-------------------------.
| Output the header file. |
`-------------------------*/
static void
header_output (void)
{
- size_t dummy_line;
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);
- token_definitions_output (out, &dummy_line);
+ token_definitions_output (out);
fprintf (out, "\
#ifndef YYSTYPE\n\
typedef %s
if (!pure_parser)
fprintf (out, "\nextern YYSTYPE %slval;\n",
- spec_name_prefix);
+ spec_name_prefix ? spec_name_prefix : "yy");
+
+ if (locations_flag)
+ {
+ fputs ("\n\n", out);
+ fprintf (out, "\
+#ifndef YYLTYPE\n\
+typedef struct yyltype\n\
+{\n\
+ int first_line;\n\
+ int first_column;\n\
+ int last_line;\n\
+ int last_column;\n\
+} yyltype;\n\
+# define YYLTYPE yyltype\n\
+#endif\n");
+ if (!pure_parser)
+ fprintf (out, "\nextern YYLTYPE %slloc;\n",
+ spec_name_prefix ? spec_name_prefix : "yy");
+ }
+
if (semantic_parser)
{
int i;
obstack_1grow (&attrs_obstack, 0);
muscle_insert ("prologue", obstack_finish (&attrs_obstack));
- /* Output the parser. */
- output_master_parser ();
+ /* Process the selected skeleton file. */
+ output_skeleton ();
+
/* Output the header if needed. */
- if (defines_flag)
+
+ if (0)
header_output ();
free (rules + 1);
projects / bison.git / blobdiff