X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/25005f6ab0c38e8106148648834389b787ad5877..ca2a6d1587f421a6c58b9f80cc8d6b983c9a62dc:/src/output.c diff --git a/src/output.c b/src/output.c index 90adafb9..6b29e5c0 100644 --- a/src/output.c +++ b/src/output.c @@ -1,53 +1,50 @@ /* Output the generated parsing program for Bison. - Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003 - Free Software Foundation, Inc. + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004, + 2005, 2006, 2007, 2008, 2009, 2010 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 . */ +#include #include "system.h" +#include #include #include +#include #include -#include #include +#include #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 | @@ -60,7 +57,7 @@ bool error_verbose = false; #define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \ \ static void \ -Name (const char *name, \ +Name (char const *name, \ Type *table_data, \ Type first, \ int begin, \ @@ -106,25 +103,23 @@ Name (const char *name, \ GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int) GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_int_table, int) -GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short) 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 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; @@ -146,8 +141,10 @@ escaped_file_name_output (FILE *out, char const *filename) 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); @@ -161,9 +158,12 @@ prepare_symbols (void) 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; @@ -177,12 +177,12 @@ prepare_symbols (void) 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); @@ -192,7 +192,7 @@ prepare_symbols (void) /* Output YYTOKNUM. */ { int i; - int *values = MALLOC (values, ntokens); + int *values = xnmalloc (ntokens, sizeof *values); for (i = 0; i < ntokens; ++i) values[i] = symbols[i]->user_token_number; muscle_insert_int_table ("toknum", values, @@ -202,61 +202,48 @@ prepare_symbols (void) } -/*-------------------------------------------------------------. -| 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 = MALLOC (rhs, nritems); - unsigned int *prhs = MALLOC (prhs, nrules); - unsigned int *rline = MALLOC (rline, nrules); - symbol_number *r1 = MALLOC (r1, nrules); - unsigned int *r2 = MALLOC (r2, nrules); - short *dprec = MALLOC (dprec, nrules); - short *merger = MALLOC (merger, nrules); + 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; } - if (i != nritems) - abort (); - 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_short_table ("dprec", dprec, 0, 0, nrules); - muscle_insert_short_table ("merger", merger, 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); @@ -272,7 +259,7 @@ static void prepare_states (void) { state_number i; - symbol_number *values = MALLOC (values, nstates); + symbol_number *values = xnmalloc (nstates, sizeof *values); for (i = 0; i < nstates; ++i) values[i] = states[i]->accessing_symbol; muscle_insert_symbol_number_table ("stos", values, @@ -285,6 +272,73 @@ prepare_states (void) } +/*-------------------------------------------------------. +| 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. | @@ -295,25 +349,22 @@ user_actions_output (FILE *out) { 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]], ", - 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); + fprintf (out, "b4_%scase(%d, [b4_syncline(%d, ", + rules[r].is_predicate ? "predicate_" : "", + 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); } - fputs ("]])\n\n", out); + fputs ("])\n\n", out); } -/*--------------------------------------. -| Output the merge functions to OUT. | -`--------------------------------------*/ +/*------------------------------------. +| Output the merge functions to OUT. | +`------------------------------------*/ static void merger_output (FILE *out) @@ -325,127 +376,121 @@ 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: yyval = %s (*yy0, *yy1); break;\n", + fprintf (out, " case %d: *yy0 = %s (*yy0, *yy1); break;\n", n, p->name); else - fprintf (out, " case %d: yyval.%s = %s (*yy0, *yy1); break;\n", + 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. */ - if (number == USER_NUMBER_ALIAS) - abort (); - - /* 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"; + const char *key; + const char *value; + +#define SET_KEY(Entry) \ + obstack_fgrow2 (&format_obstack, "symbol(%d, %s)", i, Entry); \ + obstack_1grow (&format_obstack, 0); \ + key = obstack_finish (&format_obstack); + + // Whether the symbol has an identifier. + value = symbol_id_get (sym); + SET_KEY("has_id"); + MUSCLE_INSERT_INT (key, !!value); + + // 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 : ""); + +#define CODE_PROP(PropName) \ + do { \ + code_props const *p = symbol_ ## PropName ## _get (sym); \ + SET_KEY("has_" #PropName); \ + MUSCLE_INSERT_INT (key, !!p->code); \ + \ + if (p->code) \ + { \ + SET_KEY(#PropName "_file"); \ + MUSCLE_INSERT_STRING (key, p->location.start.file); \ + \ + SET_KEY(#PropName "_line"); \ + MUSCLE_INSERT_INT (key, p->location.start.line); \ + \ + SET_KEY(#PropName); \ + MUSCLE_INSERT_STRING_RAW (key, p->code); \ + } \ + } while (0) + + CODE_PROP(destructor); + CODE_PROP(printer); +#undef CODE_PROP +#undef SET_KEY } - fputs ("])\n\n", out); } -/*---------------------------------------. -| 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, typename. */ - fprintf (out, "%s[", sep); - sep = ",\n"; - escaped_file_name_output (out, sym->destructor_location.start.file); - fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", - sym->destructor_location.start.line, - sym->tag, - sym->number, - sym->destructor, - sym->type_name); - } - fputs ("])\n\n", out); -} - - -/*------------------------------------. -| Output the symbol printers to OUT. | -`------------------------------------*/ +/*--------------------------------------. +| Output the tokens definition to OUT. | +`--------------------------------------*/ static void -symbol_printers_output (FILE *out) +token_definitions_output (FILE *out) { int i; char const *sep = ""; - fputs ("m4_define([b4_symbol_printers], \n[", out); - for (i = 0; i < nsyms; ++i) - if (symbols[i]->printer) - { - symbol *sym = symbols[i]; - - /* Filename, lineno, - Symbol-name, Symbol-number, - printer, typename. */ - fprintf (out, "%s[", sep); - sep = ",\n"; - escaped_file_name_output (out, sym->printer_location.start.file); - fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", - sym->printer_location.start.line, - sym->tag, - sym->number, - sym->printer, - sym->type_name); - } + fputs ("m4_define([b4_tokens], \n[", out); + for (i = 0; i < ntokens; ++i) + { + symbol *sym = symbols[i]; + int number = sym->user_token_number; + uniqstr id = symbol_id_get (sym); + + /* 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 and tokens without identifier. */ + if (sym != errtoken && id) + { + fprintf (out, "%s[[[%s]], %d]", + sep, id, number); + sep = ",\n"; + } + } fputs ("])\n\n", out); } @@ -494,9 +539,26 @@ prepare_actions (void) muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table, conflict_table[0], 1, high + 1); muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list, - 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); + token_definitions_output (out); + type_names_output (out); + user_actions_output (out); + // Must be last. + muscles_m4_output (out); +} /*---------------------------. | Call the skeleton parser. | @@ -506,118 +568,168 @@ static void 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_path; + 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] == '/') pkgdatadirlen--; - full_path = xmalloc (pkgdatadirlen + 1 - + (skeleton_size < sizeof m4sugar - ? sizeof m4sugar : skeleton_size)); - strcpy (full_path, pkgdatadir); - full_path[pkgdatadirlen] = '/'; - strcpy (full_path + pkgdatadirlen + 1, m4sugar); - full_m4sugar = xstrdup (full_path); - strcpy (full_path + pkgdatadirlen + 1, "c.m4"); - full_cm4 = xstrdup (full_path); - strcpy (full_path + pkgdatadirlen + 1, skeleton); + full_skeleton = xmalloc (pkgdatadirlen + 1 + + (skeleton_size < sizeof m4sugar + ? sizeof m4sugar : skeleton_size)); + strncpy (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, '/')) + 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_path); - - argv[0] = m4; - argv[1] = full_m4sugar; - argv[2] = "-"; - argv[3] = full_cm4; - argv[4] = full_path; - argv[5] = NULL; - - init_subpipe (); - pid = create_subpipe (argv, filter_fd); - free (full_m4sugar); - free (full_cm4); - free (full_path); + m4, full_m4sugar, full_m4bison, full_skeleton); - out = fdopen (filter_fd[0], "w"); - if (! out) - error (EXIT_FAILURE, get_errno (), "fdopen"); + /* 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. - /* 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); + See the thread starting at + + 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 + + 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)); + } - muscles_m4_output (out); + /* 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); - 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 ("defines_flag", defines_flag); - MUSCLE_INSERT_BOOL ("error_verbose", error_verbose); - MUSCLE_INSERT_BOOL ("locations_flag", locations_flag); - MUSCLE_INSERT_BOOL ("pure", pure_parser); + MUSCLE_INSERT_BOOL ("glr_flag", glr_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 ("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 ()); + } } @@ -634,6 +746,7 @@ output (void) prepare_rules (); prepare_states (); prepare_actions (); + prepare_symbol_definitions (); prepare (); @@ -641,6 +754,11 @@ output (void) 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; }