/* Output the generated parsing program for Bison.
Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "system.h"
int i;
/* We assume that the table will be output starting at column 2. */
int j = 2;
+ struct quoting_options *qo = clone_quoting_options (0);
+ set_quoting_style (qo, c_quoting_style);
+ set_quoting_flags (qo, QA_SPLIT_TRIGRAPHS);
for (i = 0; i < nsyms; i++)
{
- char const *cp = quotearg_style (c_quoting_style, symbols[i]->tag);
+ char *cp = quotearg_alloc (symbols[i]->tag, -1, qo);
/* Width of the next token, including the two quotes, the
comma and the space. */
int width = strlen (cp) + 2;
if (i)
obstack_1grow (&format_obstack, ' ');
MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
+ free (cp);
obstack_1grow (&format_obstack, ',');
j += width;
}
+ free (qo);
obstack_sgrow (&format_obstack, " ]b4_null[");
/* Finish table and store. */
0, 1, conflict_list_cnt);
}
+/*--------------------------------------------.
+| Output the definitions of all the muscles. |
+`--------------------------------------------*/
+
+static void
+muscles_output (FILE *out)
+{
+ fputs ("m4_init()\n", out);
+
+ user_actions_output (out);
+ merger_output (out);
+ token_definitions_output (out);
+ symbol_code_props_output (out, "destructors", &symbol_destructor_get);
+ symbol_code_props_output (out, "printers", &symbol_printer_get);
+
+ muscles_m4_output (out);
+}
\f
/*---------------------------.
| Call the skeleton parser. |
output_skeleton (void)
{
FILE *in;
- FILE *out;
int filter_fd[2];
- char const *argv[7];
+ char const *argv[9];
pid_t pid;
- /* Compute the names of the package data dir and skeleton file.
- Test whether m4sugar.m4 is readable, to check for proper
- installation. A faulty installation can cause deadlock, so a
- cheap sanity check is worthwhile. */
+ /* Compute the names of the package data dir and skeleton files. */
char const m4sugar[] = "m4sugar/m4sugar.m4";
char const m4bison[] = "bison.m4";
char *full_m4sugar;
char *full_skeleton;
char const *p;
char const *m4 = (p = getenv ("M4")) ? p : M4;
- char const *pkgdatadir = (p = getenv ("BISON_PKGDATADIR")) ? p : PKGDATADIR;
+ char const *pkgdatadir = compute_pkgdatadir ();
size_t skeleton_size = strlen (skeleton) + 1;
size_t pkgdatadirlen = strlen (pkgdatadir);
while (pkgdatadirlen && pkgdatadir[pkgdatadirlen - 1] == '/')
strcpy (full_skeleton, skeleton);
else
strcpy (full_skeleton + pkgdatadirlen + 1, skeleton);
+
+ /* Test whether m4sugar.m4 is readable, to check for proper
+ installation. A faulty installation can cause deadlock, so a
+ cheap sanity check is worthwhile. */
xfclose (xfopen (full_m4sugar, "r"));
/* Create an m4 subprocess connected to us via two pipes. */
if (trace_flag & trace_tools)
fprintf (stderr, "running: %s %s - %s %s\n",
- m4, full_m4sugar, full_m4bison, full_skeleton);
+ m4, full_m4sugar, full_m4bison, full_skeleton);
- argv[0] = m4;
- argv[1] = full_m4sugar;
- argv[2] = "-";
- argv[3] = full_m4bison;
- argv[4] = full_skeleton;
- argv[5] = trace_flag & trace_m4 ? "-dV" : NULL;
- argv[6] = NULL;
+ /* Some future version of GNU M4 (most likely 1.6) may treat the -dV in a
+ position-dependent manner. Keep it as the first argument so that all
+ files are traced.
+ See the thread starting at
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ for details. */
+ {
+ int i = 0;
+ argv[i++] = m4;
+ argv[i++] = "-I";
+ argv[i++] = pkgdatadir;
+ if (trace_flag & trace_m4)
+ argv[i++] = "-dV";
+ argv[i++] = full_m4sugar;
+ argv[i++] = "-";
+ argv[i++] = full_m4bison;
+ argv[i++] = full_skeleton;
+ argv[i++] = NULL;
+ }
+ /* When POSIXLY_CORRECT is set, some future versions of GNU M4 (most likely
+ 2.0) may drop some of the GNU extensions that Bison's skeletons depend
+ upon. So that the next release of Bison is forward compatible with those
+ future versions of GNU M4, we unset POSIXLY_CORRECT here.
+
+ FIXME: A user might set POSIXLY_CORRECT to affect processes run from
+ macros like m4_syscmd in a custom skeleton. For now, Bison makes no
+ promises about the behavior of custom skeletons, so this scenario is not a
+ concern. However, we eventually want to eliminate this shortcoming. The
+ next release of GNU M4 (1.4.12 or 1.6) will accept the -g command-line
+ option as a no-op, and later releases will accept it to indicate that
+ POSIXLY_CORRECT should be ignored. Once the GNU M4 versions that accept
+ -g are pervasive, Bison should use -g instead of unsetting
+ POSIXLY_CORRECT.
+
+ See the thread starting at
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ for details. */
+ unsetenv ("POSIXLY_CORRECT");
init_subpipe ();
pid = create_subpipe (argv, filter_fd);
- free (full_m4bison);
free (full_m4sugar);
+ free (full_m4bison);
free (full_skeleton);
- out = fdopen (filter_fd[0], "w");
- if (! out)
- error (EXIT_FAILURE, get_errno (),
- "fdopen");
-
- /* Output the definitions of all the muscles. */
- fputs ("m4_init()\n", out);
-
- user_actions_output (out);
- merger_output (out);
- token_definitions_output (out);
- symbol_code_props_output (out, "destructors", &symbol_destructor_get);
- symbol_code_props_output (out, "printers", &symbol_printer_get);
- muscles_m4_output (out);
- xfclose (out);
+ if (trace_flag & trace_muscles)
+ muscles_output (stderr);
+ {
+ FILE *out = fdopen (filter_fd[0], "w");
+ if (! out)
+ error (EXIT_FAILURE, get_errno (),
+ "fdopen");
+ muscles_output (out);
+ xfclose (out);
+ }
/* Read and process m4's output. */
timevar_push (TV_M4);
MUSCLE_INSERT_BOOL ("glr_flag", glr_parser);
MUSCLE_INSERT_BOOL ("locations_flag", locations_flag);
MUSCLE_INSERT_BOOL ("nondeterministic_flag", nondeterministic_parser);
- MUSCLE_INSERT_BOOL ("pull_flag", pull_parser);
- MUSCLE_INSERT_BOOL ("pure_flag", pure_parser);
- MUSCLE_INSERT_BOOL ("push_flag", push_parser);
MUSCLE_INSERT_BOOL ("synclines_flag", !no_lines_flag);
MUSCLE_INSERT_BOOL ("tag_seen_flag", tag_seen);
MUSCLE_INSERT_BOOL ("use_push_for_pull_flag", use_push_for_pull_flag);
/* About the skeletons. */
{
- char const *pkgdatadir = getenv ("BISON_PKGDATADIR");
/* b4_pkgdatadir is used inside m4_include in the skeletons, so digraphs
would never be expanded. Hopefully no one has M4-special characters in
his Bison installation path. */
- MUSCLE_INSERT_STRING_RAW ("pkgdatadir",
- pkgdatadir ? pkgdatadir : PKGDATADIR);
+ MUSCLE_INSERT_STRING_RAW ("pkgdatadir", compute_pkgdatadir ());
}
}
obstack_free (&format_obstack, NULL);
}
+
+char const *
+compute_pkgdatadir (void)
+{
+ char const *pkgdatadir = getenv ("BISON_PKGDATADIR");
+ return pkgdatadir ? pkgdatadir : PKGDATADIR;
+}
projects / bison.git / blobdiff