/* 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.
+ 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., 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"
+#include <concat-filename.h>
#include <configmake.h>
-#include <error.h>
+#include <filename.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"
-
static struct obstack format_obstack;
`-------------------------------------------------------------------*/
-#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \
- \
-static void \
-Name (char const *name, \
- Type *table_data, \
- Type first, \
- int begin, \
- int end) \
-{ \
- Type min = first; \
- Type max = first; \
- long int lmin; \
- long int lmax; \
- int i; \
- int j = 1; \
- \
- obstack_fgrow1 (&format_obstack, "%6d", first); \
- for (i = begin; i < end; ++i) \
- { \
- obstack_1grow (&format_obstack, ','); \
- if (j >= 10) \
- { \
- obstack_sgrow (&format_obstack, "\n "); \
- j = 1; \
- } \
- else \
- ++j; \
- obstack_fgrow1 (&format_obstack, "%6d", table_data[i]); \
- if (table_data[i] < min) \
- min = table_data[i]; \
- if (max < table_data[i]) \
- max = table_data[i]; \
- } \
- obstack_1grow (&format_obstack, 0); \
- muscle_insert (name, obstack_finish (&format_obstack)); \
- \
- lmin = min; \
- lmax = max; \
- /* Build `NAME_min' and `NAME_max' in the obstack. */ \
- obstack_fgrow1 (&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_1grow (&format_obstack, 0); \
- MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmax); \
+#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \
+ \
+static void \
+Name (char const *name, \
+ Type *table_data, \
+ Type first, \
+ int begin, \
+ int end) \
+{ \
+ Type min = first; \
+ Type max = first; \
+ long int lmin; \
+ long int lmax; \
+ int i; \
+ int j = 1; \
+ \
+ obstack_printf (&format_obstack, "%6d", first); \
+ for (i = begin; i < end; ++i) \
+ { \
+ obstack_1grow (&format_obstack, ','); \
+ if (j >= 10) \
+ { \
+ obstack_sgrow (&format_obstack, "\n "); \
+ j = 1; \
+ } \
+ else \
+ ++j; \
+ obstack_printf (&format_obstack, "%6d", table_data[i]); \
+ if (table_data[i] < min) \
+ min = table_data[i]; \
+ if (max < table_data[i]) \
+ max = table_data[i]; \
+ } \
+ obstack_1grow (&format_obstack, 0); \
+ muscle_insert (name, obstack_finish (&format_obstack)); \
+ \
+ lmin = min; \
+ lmax = max; \
+ /* Build `NAME_min' and `NAME_max' in the obstack. */ \
+ obstack_printf (&format_obstack, "%s_min", name); \
+ obstack_1grow (&format_obstack, 0); \
+ MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmin); \
+ 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_unsigned_int_table, unsigned int)
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_base_table, base_number)
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number)
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number)
-GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number)
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 ("symbols_number", nsyms);
MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
muscle_insert_symbol_number_table ("translate",
- token_translations,
- token_translations[0],
- 1, max_user_token_number + 1);
+ token_translations,
+ token_translations[0],
+ 1, max_user_token_number + 1);
/* tname -- token names. */
{
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);
- /* Width of the next token, including the two quotes, the
- comma and the space. */
- int width = strlen (cp) + 2;
-
- if (j + width > 75)
- {
- obstack_sgrow (&format_obstack, "\n ");
- j = 1;
- }
-
- if (i)
- obstack_1grow (&format_obstack, ' ');
- MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
- obstack_1grow (&format_obstack, ',');
- j += width;
+ 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 (j + width > 75)
+ {
+ obstack_sgrow (&format_obstack, "\n ");
+ j = 1;
+ }
+
+ if (i)
+ obstack_1grow (&format_obstack, ' ');
+ obstack_escape (&format_obstack, cp);
+ free (cp);
+ obstack_1grow (&format_obstack, ',');
+ j += width;
}
+ free (qo);
obstack_sgrow (&format_obstack, " ]b4_null[");
/* Finish table and store. */
for (i = 0; i < ntokens; ++i)
values[i] = symbols[i]->user_token_number;
muscle_insert_int_table ("toknum", values,
- values[0], 1, ntokens);
+ values[0], 1, ntokens);
free (values);
}
}
-/*-------------------------------------------------------------.
-| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
-| rline, dprec, merger. |
-`-------------------------------------------------------------*/
+/*----------------------------------------------------------------.
+| Prepare the muscles related to the rules: r1, r2, rline, dprec, |
+| merger, immediate. |
+`----------------------------------------------------------------*/
static void
prepare_rules (void)
{
- rule_number r;
- unsigned int i = 0;
- item_number *rhs = xnmalloc (nritems, sizeof *rhs);
- unsigned int *prhs = xnmalloc (nrules, sizeof *prhs);
unsigned int *rline = xnmalloc (nrules, sizeof *rline);
symbol_number *r1 = xnmalloc (nrules, sizeof *r1);
unsigned int *r2 = xnmalloc (nrules, sizeof *r2);
int *dprec = xnmalloc (nrules, sizeof *dprec);
int *merger = xnmalloc (nrules, sizeof *merger);
+ int *immediate = xnmalloc (nrules, sizeof *immediate);
+ rule_number r;
for (r = 0; r < nrules; ++r)
{
- item_number *rhsp = NULL;
- /* Index of rule R in RHS. */
- prhs[r] = i;
- /* RHS of the rule R. */
- for (rhsp = rules[r].rhs; *rhsp >= 0; ++rhsp)
- rhs[i++] = *rhsp;
/* LHS of the rule R. */
r1[r] = rules[r].lhs->number;
/* Length of rule R's RHS. */
- r2[r] = i - prhs[r];
- /* Separator in RHS. */
- rhs[i++] = -1;
+ r2[r] = rule_rhs_length(&rules[r]);
/* Line where rule was defined. */
rline[r] = rules[r].location.start.line;
/* Dynamic precedence (GLR). */
dprec[r] = rules[r].dprec;
/* Merger-function index (GLR). */
merger[r] = rules[r].merger;
+ /* Immediate reduction flags (GLR). */
+ immediate[r] = rules[r].is_predicate;
}
- aver (i == nritems);
- muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems);
- muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules);
muscle_insert_unsigned_int_table ("rline", rline, 0, 0, nrules);
muscle_insert_symbol_number_table ("r1", r1, 0, 0, nrules);
muscle_insert_unsigned_int_table ("r2", r2, 0, 0, nrules);
muscle_insert_int_table ("dprec", dprec, 0, 0, nrules);
muscle_insert_int_table ("merger", merger, 0, 0, nrules);
+ muscle_insert_int_table ("immediate", immediate, 0, 0, nrules);
MUSCLE_INSERT_INT ("rules_number", nrules);
MUSCLE_INSERT_INT ("max_left_semantic_context", max_left_semantic_context);
- free (rhs);
- free (prhs);
free (rline);
free (r1);
free (r2);
free (dprec);
free (merger);
+ free (immediate);
}
/*--------------------------------------------.
for (i = 0; i < nstates; ++i)
values[i] = states[i]->accessing_symbol;
muscle_insert_symbol_number_table ("stos", values,
- 0, 1, nstates);
+ 0, 1, nstates);
free (values);
MUSCLE_INSERT_INT ("last", high);
}
+/*-------------------------------------------------------.
+| Compare two symbols by type-name, and then by number. |
+`-------------------------------------------------------*/
+
+static int
+symbol_type_name_cmp (const symbol **lhs, const symbol **rhs)
+{
+ int res = UNIQSTR_CMP((*lhs)->type_name, (*rhs)->type_name);
+ if (res)
+ return res;
+ return (*lhs)->number - (*rhs)->number;
+}
+
+
+/*----------------------------------------------------------------.
+| Return a (malloc'ed) table of the symbols sorted by type-name. |
+`----------------------------------------------------------------*/
+
+static symbol **
+symbols_by_type_name (void)
+{
+ typedef int (*qcmp_type) (const void *, const void *);
+ symbol **res = xmemdup (symbols, nsyms * sizeof *res);
+ qsort (res, nsyms, sizeof *res, (qcmp_type) &symbol_type_name_cmp);
+ return res;
+}
+
+
+/*------------------------------------------------------------------.
+| Define b4_type_names, which is a list of (lists of the numbers of |
+| symbols with same type-name). |
+`------------------------------------------------------------------*/
+
+static void
+type_names_output (FILE *out)
+{
+ int i;
+ symbol **syms = symbols_by_type_name ();
+ fputs ("m4_define([b4_type_names],\n[", out);
+ for (i = 0; i < nsyms; /* nothing */)
+ {
+ // The index of the first symbol of the current type-name.
+ int i0 = i;
+ fputs (i ? ",\n[" : "[", out);
+ for (; i < nsyms && syms[i]->type_name == syms[i0]->type_name; ++i)
+ fprintf (out, "%s%d", i != i0 ? ", " : "", syms[i]->number);
+ fputs ("]", out);
+ }
+ fputs ("])\n\n", out);
+ free (syms);
+}
+
+
+/*-------------------------------------.
+| The list of all the symbol numbers. |
+`-------------------------------------*/
+
+static void
+symbol_numbers_output (FILE *out)
+{
+ int i;
+ fputs ("m4_define([b4_symbol_numbers],\n[", out);
+ for (i = 0; i < nsyms; ++i)
+ fprintf (out, "%s[%d]", i ? ", " : "", i);
+ fputs ("])\n\n", out);
+}
+
/*---------------------------------.
| Output the user actions to OUT. |
for (r = 0; r < nrules; ++r)
if (rules[r].action)
{
- 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);
- fprintf (out, ")\n[ %s]])\n\n", rules[r].action);
+ fprintf (out, "b4_%scase(%d, [b4_syncline(%d, ",
+ rules[r].is_predicate ? "predicate_" : "",
+ r + 1, rules[r].action_location.start.line);
+ string_output (out, rules[r].action_location.start.file);
+ fprintf (out, ")\n[ %s]])\n\n", rules[r].action);
}
fputs ("])\n\n", out);
}
-/*--------------------------------------.
-| Output the merge functions to OUT. |
-`--------------------------------------*/
+/*------------------------------------.
+| Output the merge functions to OUT. |
+`------------------------------------*/
static void
merger_output (FILE *out)
for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)
{
if (p->type[0] == '\0')
- fprintf (out, " case %d: *yy0 = %s (*yy0, *yy1); break;\n",
- n, p->name);
+ fprintf (out, " case %d: *yy0 = %s (*yy0, *yy1); break;\n",
+ n, p->name);
else
- fprintf (out, " case %d: yy0->%s = %s (*yy0, *yy1); break;\n",
- n, p->type, p->name);
+ fprintf (out, " case %d: yy0->%s = %s (*yy0, *yy1); break;\n",
+ n, p->type, p->name);
}
fputs ("]])\n\n", out);
}
-/*--------------------------------------.
-| Output the tokens definition to OUT. |
-`--------------------------------------*/
+
+/*---------------------------------------------.
+| Prepare the muscles for symbol definitions. |
+`---------------------------------------------*/
static void
-token_definitions_output (FILE *out)
+prepare_symbol_definitions (void)
{
int i;
- char const *sep = "";
-
- fputs ("m4_define([b4_tokens], \n[", out);
- for (i = 0; i < ntokens; ++i)
+ for (i = 0; i < nsyms; ++i)
{
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);
-
- /* Skip error token. */
- if (sym == errtoken)
- continue;
-
- /* If this string has an alias, then it is necessarily the alias
- which is to be output. */
- if (sym->alias)
- sym = sym->alias;
-
- /* Don't output literal chars or strings (when defined only as a
- string). Note that must be done after the alias resolution:
- think about `%token 'f' "f"'. */
- if (sym->tag[0] == '\'' || sym->tag[0] == '\"')
- continue;
-
- /* Don't #define nonliteral tokens whose names contain periods
- or '$' (as does the default value of the EOF token). */
- if (strchr (sym->tag, '.') || strchr (sym->tag, '$'))
- continue;
-
- fprintf (out, "%s[[[%s]], %d]",
- sep, sym->tag, number);
- sep = ",\n";
- }
- fputs ("])\n\n", out);
-}
+ const char *key;
+ const char *value;
+#define SET_KEY(Entry) \
+ obstack_printf (&format_obstack, "symbol(%d, %s)", \
+ i, Entry); \
+ obstack_1grow (&format_obstack, 0); \
+ key = obstack_finish (&format_obstack);
-/*---------------------------------------------------.
-| Output the symbol destructors or printers to OUT. |
-`---------------------------------------------------*/
+#define SET_KEY2(Entry, Suffix) \
+ obstack_printf (&format_obstack, "symbol(%d, %s_%s)", \
+ i, Entry, Suffix); \
+ obstack_1grow (&format_obstack, 0); \
+ key = obstack_finish (&format_obstack);
-static void
-symbol_code_props_output (FILE *out, char const *what,
- code_props const *(*get)(symbol const *))
-{
- int i;
- char const *sep = "";
+ // Whether the symbol has an identifier.
+ value = symbol_id_get (sym);
+ SET_KEY("has_id");
+ MUSCLE_INSERT_INT (key, !!value);
- fputs ("m4_define([b4_symbol_", out);
- fputs (what, out);
- fputs ("], \n[", out);
- for (i = 0; i < nsyms; ++i)
- {
- 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);
- }
+ // Its identifier.
+ SET_KEY("id");
+ MUSCLE_INSERT_STRING (key, value ? value : "");
+
+ // Its tag. Typically for documentation purpose.
+ SET_KEY("tag");
+ MUSCLE_INSERT_STRING (key, sym->tag);
+
+ SET_KEY("user_number");
+ MUSCLE_INSERT_INT (key, sym->user_token_number);
+
+ SET_KEY("is_token");
+ MUSCLE_INSERT_INT (key,
+ i < ntokens && sym != errtoken && sym != undeftoken);
+
+ SET_KEY("number");
+ MUSCLE_INSERT_INT (key, sym->number);
+
+ SET_KEY("has_type");
+ MUSCLE_INSERT_INT (key, !!sym->type_name);
+
+ SET_KEY("type");
+ MUSCLE_INSERT_STRING (key, sym->type_name ? sym->type_name : "");
+
+ {
+ int j;
+ for (j = 0; j < CODE_PROPS_SIZE; ++j)
+ {
+ /* "printer", not "%printer". */
+ char const *pname = code_props_type_string (j) + 1;
+ code_props const *p = symbol_code_props_get (sym, j);
+ SET_KEY2("has", pname);
+ MUSCLE_INSERT_INT (key, !!p->code);
+
+ if (p->code)
+ {
+ SET_KEY2(pname, "file");
+ MUSCLE_INSERT_STRING (key, p->location.start.file);
+
+ SET_KEY2(pname, "line");
+ MUSCLE_INSERT_INT (key, p->location.start.line);
+
+ SET_KEY(pname);
+ MUSCLE_INSERT_STRING_RAW (key, p->code);
+ }
+ }
+ }
+#undef SET_KEY2
+#undef SET_KEY
}
- fputs ("])\n\n", out);
}
lookahead token type. */
muscle_insert_rule_number_table ("defact", yydefact,
- yydefact[0], 1, nstates);
+ yydefact[0], 1, nstates);
/* Figure out what to do after reducing with each rule, depending on
the saved state from before the beginning of parsing the data
that matched this rule. */
muscle_insert_state_number_table ("defgoto", yydefgoto,
- yydefgoto[0], 1, nsyms - ntokens);
+ yydefgoto[0], 1, nsyms - ntokens);
/* Output PACT. */
muscle_insert_base_table ("pact", base,
- base[0], 1, nstates);
+ base[0], 1, nstates);
MUSCLE_INSERT_INT ("pact_ninf", base_ninf);
/* Output PGOTO. */
muscle_insert_base_table ("pgoto", base,
- base[nstates], nstates + 1, nvectors);
+ base[nstates], nstates + 1, nvectors);
muscle_insert_base_table ("table", table,
- table[0], 1, high + 1);
+ table[0], 1, high + 1);
MUSCLE_INSERT_INT ("table_ninf", table_ninf);
muscle_insert_base_table ("check", check,
- check[0], 1, high + 1);
+ check[0], 1, high + 1);
/* GLR parsing slightly modifies YYTABLE and YYCHECK (and thus
YYPACT) so that in states with unresolved conflicts, the default
that case. Nevertheless, it seems even better to be able to use
the GLR skeletons even without the non-deterministic tables. */
muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table,
- conflict_table[0], 1, high + 1);
+ conflict_table[0], 1, high + 1);
muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
- 0, 1, conflict_list_cnt);
+ 0, 1, conflict_list_cnt);
}
+
+/*--------------------------------------------.
+| Output the definitions of all the muscles. |
+`--------------------------------------------*/
+
+static void
+muscles_output (FILE *out)
+{
+ fputs ("m4_init()\n", out);
+ merger_output (out);
+ symbol_numbers_output (out);
+ type_names_output (out);
+ user_actions_output (out);
+ // Must be last.
+ muscles_m4_output (out);
+}
\f
/*---------------------------.
| Call the skeleton parser. |
static void
output_skeleton (void)
{
- FILE *in;
- FILE *out;
int filter_fd[2];
- char const *argv[7];
pid_t pid;
- /* Compute the names of the package data dir and skeleton file.
- Test whether m4sugar.m4 is readable, to check for proper
+ /* Compute the names of the package data dir and skeleton files. */
+ char const *m4 = (m4 = getenv ("M4")) ? m4 : M4;
+ char const *datadir = pkgdatadir ();
+ char *m4sugar = xconcatenated_filename (datadir, "m4sugar/m4sugar.m4", NULL);
+ char *m4bison = xconcatenated_filename (datadir, "bison.m4", NULL);
+ char *skel = (IS_PATH_WITH_DIR (skeleton)
+ ? xstrdup (skeleton)
+ : xconcatenated_filename (datadir, skeleton, NULL));
+
+ /* Test whether m4sugar.m4 is readable, to check for proper
installation. A faulty installation can cause deadlock, so a
cheap sanity check is worthwhile. */
- char const m4sugar[] = "m4sugar/m4sugar.m4";
- char const m4bison[] = "bison.m4";
- char *full_m4sugar;
- 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;
- size_t skeleton_size = strlen (skeleton) + 1;
- size_t pkgdatadirlen = strlen (pkgdatadir);
- while (pkgdatadirlen && pkgdatadir[pkgdatadirlen - 1] == '/')
- pkgdatadirlen--;
- full_skeleton = xmalloc (pkgdatadirlen + 1
- + (skeleton_size < sizeof m4sugar
- ? sizeof m4sugar : skeleton_size));
- strcpy (full_skeleton, pkgdatadir);
- 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);
- strcpy (full_skeleton + pkgdatadirlen + 1, skeleton);
- xfclose (xfopen (full_m4sugar, "r"));
+ xfclose (xfopen (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);
-
- 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;
-
- init_subpipe ();
- pid = create_subpipe (argv, filter_fd);
- free (full_m4bison);
- free (full_m4sugar);
- 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);
+ m4, m4sugar, m4bison, skel);
- 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);
+ /* 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.
- muscles_m4_output (out);
- xfclose (out);
+ See the thread starting at
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ for details. */
+ {
+ char const *argv[10];
+ 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++] = datadir;
+ if (trace_flag & trace_m4)
+ argv[i++] = "-dV";
+ argv[i++] = m4sugar;
+ argv[i++] = "-";
+ argv[i++] = m4bison;
+ argv[i++] = skel;
+ 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 (m4sugar);
+ free (m4bison);
+ free (skel);
+
+ if (trace_flag & trace_muscles)
+ muscles_output (stderr);
+ {
+ FILE *out = xfdopen (filter_fd[1], "w");
+ 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");
- if (! in)
- error (EXIT_FAILURE, get_errno (),
- "fdopen");
- scan_skel (in);
- xfclose (in);
- reap_subpipe (pid, m4);
+ {
+ FILE *in = xfdopen (filter_fd[0], "r");
+ 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);
+ }
+ 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;
+ /* BISON_USE_PUSH_FOR_PULL is for the test suite and should not be
+ documented for the user. */
+ char const *cp = getenv ("BISON_USE_PUSH_FOR_PULL");
+ bool use_push_for_pull_flag = cp && *cp && strtol (cp, 0, 10);
/* Flags. */
- MUSCLE_INSERT_BOOL ("debug_flag", debug_flag);
MUSCLE_INSERT_BOOL ("defines_flag", defines_flag);
- 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 ("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 ("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);
/* 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", pkgdatadir ());
}
}
prepare_rules ();
prepare_states ();
prepare_actions ();
+ prepare_symbol_definitions ();
prepare ();
obstack_free (&format_obstack, NULL);
}
+
+char const *
+pkgdatadir (void)
+{
+ char const *cp = getenv ("BISON_PKGDATADIR");
+ return cp ? cp : PKGDATADIR;
+}
projects / bison.git / blobdiff