/* Output the generated parsing program for Bison.
- Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 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., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
-
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#include <config.h>
#include "system.h"
+#include <configmake.h>
#include <error.h>
#include <get-errno.h>
#include <quotearg.h>
-#include <subpipe.h>
+#include <spawn-pipe.h>
#include <timevar.h>
+#include <wait-process.h>
#include "complain.h"
#include "files.h"
#include "getargs.h"
#include "gram.h"
-#include "muscle_tab.h"
+#include "muscle-tab.h"
#include "output.h"
#include "reader.h"
+#include "scan-code.h" /* max_left_semantic_context */
+#include "scan-skel.h"
#include "symtab.h"
#include "tables.h"
-/* From src/scan-skel.l. */
-void scan_skel (FILE *);
-
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
static struct obstack format_obstack;
-bool error_verbose = false;
-
-
/*-------------------------------------------------------------------.
| Create a function NAME which associates to the muscle NAME the |
#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \
\
static void \
-Name (const char *name, \
+Name (char const *name, \
Type *table_data, \
Type first, \
int begin, \
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number)
-/*----------------------------------------------------------------------.
-| Print to OUT a representation of FILENAME escaped both for C and M4. |
-`----------------------------------------------------------------------*/
+/*--------------------------------------------------------------------.
+| Print to OUT a representation of STRING escaped both for C and M4. |
+`--------------------------------------------------------------------*/
static void
-escaped_file_name_output (FILE *out, char const *filename)
+escaped_output (FILE *out, char const *string)
{
char const *p;
fprintf (out, "[[");
- for (p = quotearg_style (c_quoting_style, filename); *p; p++)
+ for (p = quotearg_style (c_quoting_style, string); *p; p++)
switch (*p)
{
case '$': fputs ("$][", out); break;
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++)
{
- const char *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;
}
- /* Add a NULL entry to list of tokens (well, 0, as NULL might not be
- defined). */
- obstack_sgrow (&format_obstack, " 0");
+ free (qo);
+ obstack_sgrow (&format_obstack, " ]b4_null[");
/* Finish table and store. */
obstack_1grow (&format_obstack, 0);
/* Merger-function index (GLR). */
merger[r] = rules[r].merger;
}
- if (i != nritems)
- abort ();
+ aver (i == nritems);
muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems);
muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules);
{
rule_number r;
- fputs ("m4_define([b4_actions], \n[[", out);
+ fputs ("m4_define([b4_actions], \n[", out);
for (r = 0; r < nrules; ++r)
if (rules[r].action)
{
- fprintf (out, " case %d:\n", r + 1);
-
- fprintf (out, "]b4_syncline([[%d]], ",
+ fprintf (out, "b4_case(%d, [b4_syncline(%d, ", r + 1,
rules[r].action_location.start.line);
- escaped_file_name_output (out, rules[r].action_location.start.file);
- fprintf (out, ")[\n");
- fprintf (out, " %s\n break;\n\n",
- rules[r].action);
+ escaped_output (out, rules[r].action_location.start.file);
+ fprintf (out, ")\n[ %s]])\n\n", rules[r].action);
}
- fputs ("]])\n\n", out);
+ fputs ("])\n\n", out);
}
/*--------------------------------------.
symbol *sym = symbols[i];
int number = sym->user_token_number;
- /* At this stage, if there are literal aliases, they are part of
- SYMBOLS, so we should not find symbols which are the aliases
- here. */
- if (number == USER_NUMBER_ALIAS)
- abort ();
+ /* At this stage, if there are literal string aliases, they are
+ part of SYMBOLS, so we should not find their aliased symbols
+ here. */
+ aver (number != USER_NUMBER_HAS_STRING_ALIAS);
/* Skip error token. */
if (sym == errtoken)
if (sym->tag[0] == '\'' || sym->tag[0] == '\"')
continue;
- /* Don't #define nonliteral tokens whose names contain periods
- or '$' (as does the default value of the EOF token). */
- if (strchr (sym->tag, '.') || strchr (sym->tag, '$'))
+ /* Don't #define nonliteral tokens whose names contain periods,
+ dashes or '$' (as does the default value of the EOF token). */
+ if (mbschr (sym->tag, '.')
+ || mbschr (sym->tag, '-')
+ || mbschr (sym->tag, '$'))
continue;
- fprintf (out, "%s[[[%s]], [%d]]",
+ fprintf (out, "%s[[[%s]], %d]",
sep, sym->tag, number);
sep = ",\n";
}
}
-/*---------------------------------------.
-| Output the symbol destructors to OUT. |
-`---------------------------------------*/
-
-static void
-symbol_destructors_output (FILE *out)
-{
- int i;
- char const *sep = "";
-
- fputs ("m4_define([b4_symbol_destructors], \n[", out);
- for (i = 0; i < nsyms; ++i)
- if (symbols[i]->destructor)
- {
- symbol *sym = symbols[i];
-
- /* Filename, lineno,
- Symbol-name, Symbol-number,
- destructor, optional typename. */
- fprintf (out, "%s[", sep);
- sep = ",\n";
- escaped_file_name_output (out, sym->destructor_location.start.file);
- fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]]",
- sym->destructor_location.start.line,
- sym->tag,
- sym->number,
- sym->destructor);
- if (sym->type_name)
- fprintf (out, ", [[%s]]", sym->type_name);
- fputc (']', out);
- }
- fputs ("])\n\n", out);
-}
-
-
-/*------------------------------------.
-| Output the symbol printers to OUT. |
-`------------------------------------*/
+/*---------------------------------------------------.
+| Output the symbol destructors or printers to OUT. |
+`---------------------------------------------------*/
static void
-symbol_printers_output (FILE *out)
+symbol_code_props_output (FILE *out, char const *what,
+ code_props const *(*get)(symbol const *))
{
int i;
char const *sep = "";
- fputs ("m4_define([b4_symbol_printers], \n[", out);
+ fputs ("m4_define([b4_symbol_", out);
+ fputs (what, out);
+ fputs ("], \n[", out);
for (i = 0; i < nsyms; ++i)
- if (symbols[i]->printer)
- {
- symbol *sym = symbols[i];
-
- /* Filename, lineno,
- Symbol-name, Symbol-number,
- printer, optional typename. */
- fprintf (out, "%s[", sep);
- sep = ",\n";
- escaped_file_name_output (out, sym->printer_location.start.file);
- fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]]",
- sym->printer_location.start.line,
- sym->tag,
- sym->number,
- sym->printer);
- if (sym->type_name)
- fprintf (out, ", [[%s]]", sym->type_name);
- fputc (']', out);
- }
+ {
+ symbol *sym = symbols[i];
+ char const *code = (*get) (sym)->code;
+ if (code)
+ {
+ location loc = (*get) (sym)->location;
+ /* Filename, lineno,
+ Symbol-name, Symbol-number,
+ code, optional typename. */
+ fprintf (out, "%s[", sep);
+ sep = ",\n";
+ escaped_output (out, loc.start.file);
+ fprintf (out, ", %d, ", loc.start.line);
+ escaped_output (out, sym->tag);
+ fprintf (out, ", %d, [[%s]]", sym->number, code);
+ if (sym->type_name)
+ fprintf (out, ", [[%s]]", sym->type_name);
+ fputc (']', out);
+ }
+ }
fputs ("])\n\n", out);
}
prepare_actions (void)
{
/* Figure out the actions for the specified state, indexed by
- look-ahead token type. */
+ lookahead token type. */
muscle_insert_rule_number_table ("defact", yydefact,
yydefact[0], 1, nstates);
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[6];
+ char const *argv[10];
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_cm4;
+ char *full_m4bison;
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] == '/')
full_skeleton = xmalloc (pkgdatadirlen + 1
+ (skeleton_size < sizeof m4sugar
? sizeof m4sugar : skeleton_size));
- strcpy (full_skeleton, pkgdatadir);
+ memcpy (full_skeleton, pkgdatadir, pkgdatadirlen);
full_skeleton[pkgdatadirlen] = '/';
strcpy (full_skeleton + pkgdatadirlen + 1, m4sugar);
full_m4sugar = xstrdup (full_skeleton);
- strcpy (full_skeleton + pkgdatadirlen + 1, "c.m4");
- full_cm4 = xstrdup (full_skeleton);
- strcpy (full_skeleton + pkgdatadirlen + 1, skeleton);
+ strcpy (full_skeleton + pkgdatadirlen + 1, m4bison);
+ full_m4bison = xstrdup (full_skeleton);
+ if (mbschr (skeleton, '/'))
+ 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_cm4, full_skeleton);
+ m4, full_m4sugar, full_m4bison, full_skeleton);
- argv[0] = m4;
- argv[1] = full_m4sugar;
- argv[2] = "-";
- argv[3] = full_cm4;
- argv[4] = full_skeleton;
- argv[5] = 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.
- init_subpipe ();
- pid = create_subpipe (argv, filter_fd);
+ 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;
+
+ /* When POSIXLY_CORRECT is set, GNU M4 1.6 and later disable GNU
+ extensions, which Bison's skeletons depend on. With older M4,
+ it has no effect. M4 1.4.12 added a -g/--gnu command-line
+ option to make it explicit that a program wants GNU M4
+ extensions even when POSIXLY_CORRECT is set.
+
+ See the thread starting at
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ for details. */
+ if (*M4_GNU_OPTION)
+ argv[i++] = M4_GNU_OPTION;
+
+ 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;
+ aver (i <= ARRAY_CARDINALITY (argv));
+ }
+
+ /* The ugly cast is because gnulib gets the const-ness wrong. */
+ pid = create_pipe_bidi ("m4", m4, (char **)(void*)argv, false, true,
+ true, filter_fd);
free (full_m4sugar);
- free (full_cm4);
+ 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_destructors_output (out);
- symbol_printers_output (out);
-
- muscles_m4_output (out);
-
- fputs ("m4_wrap([m4_divert_pop(0)])\n", out);
- fputs ("m4_divert_push(0)dnl\n", out);
- xfclose (out);
+ if (trace_flag & trace_muscles)
+ muscles_output (stderr);
+ {
+ FILE *out = fdopen (filter_fd[1], "w");
+ if (! out)
+ error (EXIT_FAILURE, get_errno (),
+ "fdopen");
+ muscles_output (out);
+ xfclose (out);
+ }
/* Read and process m4's output. */
timevar_push (TV_M4);
- in = fdopen (filter_fd[1], "r");
+ in = fdopen (filter_fd[0], "r");
if (! in)
- error (EXIT_FAILURE, get_errno (), "fdopen");
+ error (EXIT_FAILURE, get_errno (),
+ "fdopen");
scan_skel (in);
+ /* scan_skel should have read all of M4's output. Otherwise, when we
+ close the pipe, we risk letting M4 report a broken-pipe to the
+ Bison user. */
+ aver (feof (in));
xfclose (in);
- reap_subpipe (pid, m4);
+ wait_subprocess (pid, "m4", false, false, true, true, NULL);
timevar_pop (TV_M4);
}
static void
prepare (void)
{
+ /* BISON_USE_PUSH_FOR_PULL is for the test suite and should not be documented
+ for the user. */
+ char const *use_push_for_pull_env = getenv ("BISON_USE_PUSH_FOR_PULL");
+ bool use_push_for_pull_flag = false;
+ if (use_push_for_pull_env != NULL
+ && use_push_for_pull_env[0] != '\0'
+ && 0 != strcmp (use_push_for_pull_env, "0"))
+ use_push_for_pull_flag = true;
+
/* Flags. */
- MUSCLE_INSERT_BOOL ("debug", debug_flag);
+ MUSCLE_INSERT_BOOL ("debug_flag", debug_flag);
MUSCLE_INSERT_BOOL ("defines_flag", defines_flag);
- MUSCLE_INSERT_BOOL ("error_verbose", error_verbose);
+ MUSCLE_INSERT_BOOL ("error_verbose_flag", error_verbose);
+ MUSCLE_INSERT_BOOL ("glr_flag", glr_parser);
MUSCLE_INSERT_BOOL ("locations_flag", locations_flag);
- MUSCLE_INSERT_BOOL ("pure", pure_parser);
+ MUSCLE_INSERT_BOOL ("nondeterministic_flag", nondeterministic_parser);
MUSCLE_INSERT_BOOL ("synclines_flag", !no_lines_flag);
+ MUSCLE_INSERT_BOOL ("tag_seen_flag", tag_seen);
+ MUSCLE_INSERT_BOOL ("token_table_flag", token_table_flag);
+ MUSCLE_INSERT_BOOL ("use_push_for_pull_flag", use_push_for_pull_flag);
+ MUSCLE_INSERT_BOOL ("yacc_flag", yacc_flag);
/* File names. */
- MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
-
- /* User Code. */
- obstack_1grow (&pre_prologue_obstack, 0);
- obstack_1grow (&post_prologue_obstack, 0);
- muscle_insert ("pre_prologue", obstack_finish (&pre_prologue_obstack));
- muscle_insert ("post_prologue", obstack_finish (&post_prologue_obstack));
-
- /* Find the right skeleton file. */
- if (!skeleton)
- {
- if (glr_parser || nondeterministic_parser)
- skeleton = "glr.c";
- else
- skeleton = "yacc.c";
- }
-
- /* Parse the skeleton file and output the needed parsers. */
- MUSCLE_INSERT_C_STRING ("skeleton", skeleton);
+ if (spec_name_prefix)
+ MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
+
+ MUSCLE_INSERT_STRING ("file_name_all_but_ext", all_but_ext);
+
+#define DEFINE(Name) MUSCLE_INSERT_STRING (#Name, Name ? Name : "")
+ DEFINE (dir_prefix);
+ DEFINE (parser_file_name);
+ DEFINE (spec_defines_file);
+ DEFINE (spec_file_prefix);
+ DEFINE (spec_graph_file);
+ DEFINE (spec_name_prefix);
+ DEFINE (spec_outfile);
+ DEFINE (spec_verbose_file);
+#undef DEFINE
+
+ /* Find the right skeleton file, and add muscles about the skeletons. */
+ if (skeleton)
+ MUSCLE_INSERT_C_STRING ("skeleton", skeleton);
+ else
+ skeleton = language->skeleton;
+
+ /* About the skeletons. */
+ {
+ /* 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", compute_pkgdatadir ());
+ }
}
output_skeleton ();
obstack_free (&format_obstack, NULL);
- obstack_free (&pre_prologue_obstack, NULL);
- obstack_free (&post_prologue_obstack, NULL);
+}
+
+char const *
+compute_pkgdatadir (void)
+{
+ char const *pkgdatadir = getenv ("BISON_PKGDATADIR");
+ return pkgdatadir ? pkgdatadir : PKGDATADIR;
}
projects / bison.git / blobdiff