X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/95612cfa608188fc323ed3f8560cc6aea953ff32..c5ae8e85aa660a5dcab6873d8984a49a055c2146:/src/output.c diff --git a/src/output.c b/src/output.c index 177e6c05..12b5d97f 100644 --- a/src/output.c +++ b/src/output.c @@ -1,48 +1,49 @@ -/* Output the generated parsing program for bison, - Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002 - Free Software Foundation, Inc. +/* Output the generated parsing program for Bison. + + 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 . */ +#include #include "system.h" -#include "quotearg.h" -#include "error.h" -#include "subpipe.h" -#include "getargs.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "complain.h" #include "files.h" +#include "getargs.h" #include "gram.h" -#include "complain.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" -#include "muscle_tab.h" - -/* From src/scan-skel.l. */ -void scan_skel (FILE *); - static struct obstack format_obstack; -int error_verbose = 0; - - /*-------------------------------------------------------------------. | Create a function NAME which associates to the muscle NAME the | @@ -52,84 +53,91 @@ int error_verbose = 0; `-------------------------------------------------------------------*/ -#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \ - \ -static void \ -Name (const char *name, \ - Type *table_data, \ - Type first, \ - int begin, \ - int end) \ -{ \ - Type min = first; \ - Type max = first; \ - 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)); \ - \ - /* 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), \ - (long int) min); \ - obstack_fgrow1 (&format_obstack, "%s_max", name); \ - obstack_1grow (&format_obstack, 0); \ - MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), \ - (long int) max); \ +#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]; \ + } \ + muscle_insert (name, obstack_finish0 (&format_obstack)); \ + \ + lmin = min; \ + lmax = max; \ + /* Build `NAME_min' and `NAME_max' in the obstack. */ \ + obstack_printf (&format_obstack, "%s_min", name); \ + MUSCLE_INSERT_LONG_INT (obstack_finish0 (&format_obstack), lmin); \ + obstack_printf (&format_obstack, "%s_max", name); \ + MUSCLE_INSERT_LONG_INT (obstack_finish0 (&format_obstack), lmax); \ } 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_t) -GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number_t) -GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number_t) -GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number_t) -GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number_t) +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_state_number_table, state_number) -/*----------------------------------------------------------------------. -| Print to OUT a representation of FILENAME escaped both for C and M4. | -`----------------------------------------------------------------------*/ +/*----------------------------------------------------------------. +| Print to OUT a representation of CP quoted and escaped for M4. | +`----------------------------------------------------------------*/ static void -escaped_file_name_output (FILE *out, char const *filename) +quoted_output (FILE *out, char const *cp) { - char const *p; fprintf (out, "[["); - for (p = quotearg_style (c_quoting_style, filename); *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 | @@ -141,119 +149,111 @@ prepare_symbols (void) { 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; - int j = 0; + /* 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++) { - /* Be sure not to use twice the same QUOTEARG slot: - SYMBOL_TAG_GET uses slot 0. */ - const char *cp = - quotearg_n_style (1, c_quoting_style, - symbols[i]->tag); - /* Width of the next token, including the two quotes, the comma - and the space. */ - int strsize = strlen (cp) + 2; - - if (j + strsize > 75) - { - obstack_sgrow (&format_obstack, "\n "); - j = 2; - } - - MUSCLE_OBSTACK_SGROW (&format_obstack, cp); - obstack_sgrow (&format_obstack, ", "); - j += strsize; + 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; } - /* 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); - muscle_insert ("tname", obstack_finish (&format_obstack)); + muscle_insert ("tname", obstack_finish0 (&format_obstack)); } /* Output YYTOKNUM. */ { int i; - int *values = XCALLOC (int, 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, - 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_t r; - unsigned int i = 0; - item_number_t *rhs = XMALLOC (item_number_t, nritems); - unsigned int *prhs = XMALLOC (unsigned int, nrules); - unsigned int *rline = XMALLOC (unsigned int, nrules); - symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules); - unsigned int *r2 = XMALLOC (unsigned int, nrules); - short *dprec = XMALLOC (short, nrules); - short *merger = XMALLOC (short, 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_t *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.first_line; + 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; } - assert (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_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); free (dprec); free (merger); + free (immediate); } /*--------------------------------------------. @@ -263,13 +263,13 @@ prepare_rules (void) static void prepare_states (void) { - state_number_t i; - symbol_number_t *values = - (symbol_number_t *) alloca (sizeof (symbol_number_t) * nstates); + state_number i; + 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, - 0, 1, nstates); + 0, 1, nstates); + free (values); MUSCLE_INSERT_INT ("last", high); MUSCLE_INSERT_INT ("final_state_number", final_state->number); @@ -277,6 +277,73 @@ 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) + res = (*lhs)->number - (*rhs)->number; + return res; +} + + +/*----------------------------------------------------------------. +| 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. | @@ -285,27 +352,24 @@ prepare_states (void) static void user_actions_output (FILE *out) { - rule_number_t r; + 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.first_line); - escaped_file_name_output (out, rules[r].action_location.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); + string_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) @@ -317,132 +381,95 @@ 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", - n, p->name); + 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", - 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; - int first = 1; - - fputs ("m4_define([b4_tokens], \n[", out); - for (i = 0; i < ntokens; ++i) + for (i = 0; i < nsyms; ++i) { - symbol_t *symbol = symbols[i]; - int number = symbol->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. */ - assert (number != USER_NUMBER_ALIAS); - - /* Skip error token. */ - if (symbol == errtoken) - continue; - - /* If this string has an alias, then it is necessarily the alias - which is to be output. */ - if (symbol->alias) - symbol = symbol->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 (symbol->tag[0] == '\'' || symbol->tag[0] == '\"') - continue; - - /* Don't #define nonliteral tokens whose names contain periods - or '$' (as does the default value of the EOF token). */ - if (strchr (symbol->tag, '.') || strchr (symbol->tag, '$')) - continue; - - fprintf (out, "%s[[[%s]], [%d]]", - first ? "" : ",\n", symbol->tag, number); - - first = 0; - } - fputs ("])\n\n", out); -} + symbol *sym = symbols[i]; + const char *key; + const char *value; +#define SET_KEY(Entry) \ + obstack_printf (&format_obstack, "symbol(%d, %s)", \ + i, Entry); \ + key = obstack_finish0 (&format_obstack); -/*---------------------------------------. -| Output the symbol destructors to OUT. | -`---------------------------------------*/ +#define SET_KEY2(Entry, Suffix) \ + obstack_printf (&format_obstack, "symbol(%d, %s_%s)", \ + i, Entry, Suffix); \ + key = obstack_finish0 (&format_obstack); -static void -symbol_destructors_output (FILE *out) -{ - int i; - int first = 1; + /* 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_destructors], \n[", out); - for (i = 0; i < nsyms; ++i) - if (symbols[i]->destructor) - { - symbol_t *symbol = symbols[i]; - - /* Filename, lineno, - Symbol-name, Symbol-number, - destructor, typename. */ - fprintf (out, "%s[", - first ? "" : ",\n"); - escaped_file_name_output (out, symbol->destructor_location.file); - fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", - symbol->destructor_location.first_line, - symbol->tag, - symbol->number, - symbol->destructor, - symbol->type_name); - - first = 0; - } - fputs ("])\n\n", 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); -/*------------------------------------. -| Output the symbol printers to OUT. | -`------------------------------------*/ + SET_KEY("user_number"); + MUSCLE_INSERT_INT (key, sym->user_token_number); -static void -symbol_printers_output (FILE *out) -{ - int i; - int first = 1; + 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 : ""); - fputs ("m4_define([b4_symbol_printers], \n[", out); - for (i = 0; i < nsyms; ++i) - if (symbols[i]->destructor) { - symbol_t *symbol = symbols[i]; - - /* Filename, lineno, - Symbol-name, Symbol-number, - printer, typename. */ - fprintf (out, "%s[", - first ? "" : ",\n"); - escaped_file_name_output (out, symbol->printer_location.file); - fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", - symbol->printer_location.first_line, - symbol->tag, - symbol->number, - symbol->printer, - symbol->type_name); - - first = 0; + 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); + } + } } - fputs ("])\n\n", out); +#undef SET_KEY2 +#undef SET_KEY + } } @@ -453,30 +480,30 @@ prepare_actions (void) 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 @@ -488,11 +515,27 @@ prepare_actions (void) 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, - 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); +} /*---------------------------. | Call the skeleton parser. | @@ -501,117 +544,144 @@ prepare_actions (void) 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 *full_path; - 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_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); - in = fopen (full_path, "r"); - if (! in) - error (EXIT_FAILURE, errno, "%s", full_path); - xfclose (in); - strcpy (full_path + pkgdatadirlen + 1, skeleton); + xfclose (xfopen (m4sugar, "r")); /* Create an m4 subprocess connected to us via two pipes. */ if (trace_flag & trace_tools) - fprintf (stderr, "running: %s -I %s %s - %s\n", - m4, pkgdatadir, m4sugar, full_path); - - argv[0] = m4; - argv[1] = "-I"; - argv[2] = pkgdatadir; - argv[3] = m4sugar; - argv[4] = "-"; - argv[5] = full_path; - argv[6] = NULL; - - init_subpipe (); - pid = create_subpipe (argv, filter_fd); - free (full_path); - - out = fdopen (filter_fd[0], "w"); - if (! out) - error (EXIT_FAILURE, errno, "fdopen"); - - /* Output the definitions of all the muscles. */ - fputs ("m4_init()\n", out); + fprintf (stderr, "running: %s %s - %s %s\n", + m4, m4sugar, m4bison, skel); - user_actions_output (out); - merger_output (out); - token_definitions_output (out); - symbol_destructors_output (out); - symbol_printers_output (out); + /* 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); + See the thread starting at + + 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 + + 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); + } - fputs ("m4_wrap([m4_divert_pop(0)])\n", out); - fputs ("m4_divert_push(0)dnl\n", out); - xfclose (out); + 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); - in = fdopen (filter_fd[1], "r"); - if (! in) - error (EXIT_FAILURE, 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) { - /* Flags. */ - MUSCLE_INSERT_INT ("debug", debug_flag); - MUSCLE_INSERT_INT ("defines_flag", defines_flag); - MUSCLE_INSERT_INT ("error_verbose", error_verbose); - MUSCLE_INSERT_INT ("locations_flag", locations_flag); - MUSCLE_INSERT_INT ("pure", pure_parser); - MUSCLE_INSERT_INT ("synclines_flag", !no_lines_flag); - - /* FIXME: This is wrong: the muscles should decide whether they hold - a copy or not, but the situation is too obscure currently. */ - 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) - skeleton = "glr.c"; - else - skeleton = "yacc.c"; - } + /* 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); - /* Parse the skeleton file and output the needed parsers. */ - MUSCLE_INSERT_C_STRING ("skeleton", skeleton); + /* Flags. */ + MUSCLE_INSERT_BOOL ("defines_flag", defines_flag); + 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 ("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. */ + 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", pkgdatadir ()); + } } @@ -628,6 +698,7 @@ output (void) prepare_rules (); prepare_states (); prepare_actions (); + prepare_symbol_definitions (); prepare (); @@ -635,6 +706,11 @@ output (void) output_skeleton (); obstack_free (&format_obstack, NULL); - obstack_free (&pre_prologue_obstack, NULL); - obstack_free (&post_prologue_obstack, NULL); +} + +char const * +pkgdatadir (void) +{ + char const *cp = getenv ("BISON_PKGDATADIR"); + return cp ? cp : PKGDATADIR; }