/* Output the generated parsing program for Bison.
- Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007, 2008 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.
#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 "symtab.h"
#include "tables.h"
+# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
static struct obstack format_obstack;
int i; \
int j = 1; \
\
- obstack_fgrow1 (&format_obstack, "%6d", first); \
+ obstack_printf (&format_obstack, "%6d", first); \
for (i = begin; i < end; ++i) \
{ \
obstack_1grow (&format_obstack, ','); \
} \
else \
++j; \
- obstack_fgrow1 (&format_obstack, "%6d", table_data[i]); \
+ obstack_printf (&format_obstack, "%6d", table_data[i]); \
if (table_data[i] < min) \
min = table_data[i]; \
if (max < table_data[i]) \
lmin = min; \
lmax = max; \
/* Build `NAME_min' and `NAME_max' in the obstack. */ \
- obstack_fgrow1 (&format_obstack, "%s_min", name); \
+ obstack_printf (&format_obstack, "%s_min", name); \
obstack_1grow (&format_obstack, 0); \
MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmin); \
- obstack_fgrow1 (&format_obstack, "%s_max", name); \
+ obstack_printf (&format_obstack, "%s_max", name); \
obstack_1grow (&format_obstack, 0); \
MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmax); \
}
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number)
-/*--------------------------------------------------------------------.
-| Print to OUT a representation of STRING escaped both for C and M4. |
-`--------------------------------------------------------------------*/
+/*----------------------------------------------------------------.
+| Print to OUT a representation of CP quoted and escaped for M4. |
+`----------------------------------------------------------------*/
static void
-escaped_output (FILE *out, char const *string)
+quoted_output (FILE *out, char const *cp)
{
- char const *p;
fprintf (out, "[[");
- for (p = quotearg_style (c_quoting_style, string); *p; p++)
- switch (*p)
+ for (; *cp; cp++)
+ switch (*cp)
{
case '$': fputs ("$][", out); break;
case '@': fputs ("@@", out); break;
case '[': fputs ("@{", out); break;
case ']': fputs ("@}", out); break;
- default: fputc (*p, out); break;
+ default: fputc (*cp, out); break;
}
fprintf (out, "]]");
}
+/*----------------------------------------------------------------.
+| Print to OUT a representation of STRING quoted and escaped both |
+| for C and M4. |
+`----------------------------------------------------------------*/
+
+static void
+string_output (FILE *out, char const *string)
+{
+ quoted_output (out, quotearg_style (c_quoting_style, string));
+}
+
/*------------------------------------------------------------------.
| Prepare the muscles related to the symbols: translate, tname, and |
static void
prepare_symbols (void)
{
- MUSCLE_INSERT_BOOL ("token_table", token_table_flag);
MUSCLE_INSERT_INT ("tokens_number", ntokens);
MUSCLE_INSERT_INT ("nterms_number", nvars);
MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
if (i)
obstack_1grow (&format_obstack, ' ');
- MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
+ obstack_escape (&format_obstack, cp);
free (cp);
obstack_1grow (&format_obstack, ',');
j += width;
{
fprintf (out, "b4_case(%d, [b4_syncline(%d, ", r + 1,
rules[r].action_location.start.line);
- escaped_output (out, rules[r].action_location.start.file);
+ string_output (out, rules[r].action_location.start.file);
fprintf (out, ")\n[ %s]])\n\n", rules[r].action);
}
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. */
- aver (number != USER_NUMBER_ALIAS);
+ /* 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]",
code, optional typename. */
fprintf (out, "%s[", sep);
sep = ",\n";
- escaped_output (out, loc.start.file);
+ string_output (out, loc.start.file);
fprintf (out, ", %d, ", loc.start.line);
- escaped_output (out, sym->tag);
+ quoted_output (out, sym->tag);
fprintf (out, ", %d, [[%s]]", sym->number, code);
if (sym->type_name)
- fprintf (out, ", [[%s]]", sym->type_name);
+ {
+ fputs (", ", out);
+ quoted_output (out, sym->type_name);
+ }
fputc (']', out);
}
}
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[10];
pid_t pid;
/* Compute the names of the package data dir and skeleton files. */
full_skeleton = xmalloc (pkgdatadirlen + 1
+ (skeleton_size < sizeof m4sugar
? sizeof m4sugar : skeleton_size));
- strncpy (full_skeleton, pkgdatadir, pkgdatadirlen);
+ memcpy (full_skeleton, pkgdatadir, pkgdatadirlen);
full_skeleton[pkgdatadirlen] = '/';
strcpy (full_skeleton + pkgdatadirlen + 1, m4sugar);
full_m4sugar = xstrdup (full_skeleton);
strcpy (full_skeleton + pkgdatadirlen + 1, m4bison);
full_m4bison = xstrdup (full_skeleton);
- if (strchr (skeleton, '/'))
+ if (mbschr (skeleton, '/'))
strcpy (full_skeleton, skeleton);
else
strcpy (full_skeleton + pkgdatadirlen + 1, skeleton);
{
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++] = full_m4bison;
argv[i++] = full_skeleton;
argv[i++] = NULL;
+ aver (i <= ARRAY_CARDINALITY (argv));
}
- /* 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);
+ /* 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_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[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);
- end_of_output_subpipe (pid, filter_fd);
- in = fdopen (filter_fd[1], "r");
+ in = fdopen (filter_fd[0], "r");
if (! in)
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);
}
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);
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