X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8e1687aef68e5955ecd3140149d5f97337c222f1..09ccae9b18a7c09ebf7bb8df2a18c8c4a6def248:/src/output.c diff --git a/src/output.c b/src/output.c index 1a7769df..a7003edf 100644 --- a/src/output.c +++ b/src/output.c @@ -1,28 +1,27 @@ /* Output the generated parsing program for Bison. Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004, - 2005, 2006 Free Software Foundation, Inc. + 2005, 2006, 2007, 2008 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 . */ #include #include "system.h" +#include #include #include #include @@ -144,6 +143,7 @@ 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); @@ -157,9 +157,12 @@ 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++) { - char const *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; @@ -173,9 +176,11 @@ prepare_symbols (void) if (i) obstack_1grow (&format_obstack, ' '); MUSCLE_OBSTACK_SGROW (&format_obstack, cp); + free (cp); obstack_1grow (&format_obstack, ','); j += width; } + free (qo); obstack_sgrow (&format_obstack, " ]b4_null["); /* Finish table and store. */ @@ -235,7 +240,7 @@ prepare_rules (void) /* Merger-function index (GLR). */ merger[r] = rules[r].merger; } - assert (i == nritems); + aver (i == nritems); muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems); muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules); @@ -278,6 +283,73 @@ prepare_states (void) } +/*-------------------------------------------------------. +| Compare two symbols by type-name, and then by number. | +`-------------------------------------------------------*/ + +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 () +{ + 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. | @@ -300,9 +372,9 @@ user_actions_output (FILE *out) fputs ("])\n\n", out); } -/*--------------------------------------. -| Output the merge functions to OUT. | -`--------------------------------------*/ +/*------------------------------------. +| Output the merge functions to OUT. | +`------------------------------------*/ static void merger_output (FILE *out) @@ -323,6 +395,49 @@ merger_output (FILE *out) fputs ("]])\n\n", out); } + +/*---------------------------------------. +| Output the symbol definitions to OUT. | +`---------------------------------------*/ + +static void +symbol_definitions_output (FILE *out) +{ + int i; + for (i = 0; i < nsyms; ++i) + { + symbol *sym = symbols[i]; + const char *key; + +#define SET_KEY(Entry) \ + obstack_fgrow2 (&format_obstack, "symbol(%d, %s)", i, Entry); \ + obstack_1grow (&format_obstack, 0); \ + key = obstack_finish (&format_obstack); + + 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_name"); + MUSCLE_INSERT_INT (key, !!sym->type_name); + + SET_KEY("type_name"); + MUSCLE_INSERT_STRING (key, sym->type_name ? sym->type_name : ""); + +#undef SET_KEY + } +} + + /*--------------------------------------. | Output the tokens definition to OUT. | `--------------------------------------*/ @@ -342,7 +457,7 @@ token_definitions_output (FILE *out) /* 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); + aver (number != USER_NUMBER_ALIAS); /* Skip error token. */ if (sym == errtoken) @@ -372,70 +487,41 @@ token_definitions_output (FILE *out) } -/*---------------------------------------. -| Output the symbol destructors to OUT. | -`---------------------------------------*/ +/*---------------------------------------------------. +| Output the symbol destructors or printers to OUT. | +`---------------------------------------------------*/ static void -symbol_destructors_output (FILE *out) +symbol_code_props_output (FILE *out, char const *what, + code_props const *(*get)(symbol const *)) { int i; char const *sep = ""; - fputs ("m4_define([b4_symbol_destructors], \n[", out); + fputs ("m4_define([b4_symbol_", out); + fputs (what, out); + fputs ("], \n[", out); for (i = 0; i < nsyms; ++i) - if (symbol_destructor_get (symbols[i])) - { - symbol *sym = symbols[i]; - - /* Filename, lineno, - Symbol-name, Symbol-number, - destructor, optional typename. */ - fprintf (out, "%s[", sep); - sep = ",\n"; - escaped_output (out, symbol_destructor_location_get (sym).start.file); - fprintf (out, ", %d, ", - symbol_destructor_location_get (sym).start.line); - escaped_output (out, sym->tag); - fprintf (out, ", %d, [[%s]]", sym->number, - symbol_destructor_get (sym)); - if (sym->type_name) - fprintf (out, ", [[%s]]", sym->type_name); - fputc (']', out); - } - fputs ("])\n\n", out); -} - - -/*------------------------------------. -| Output the symbol printers to OUT. | -`------------------------------------*/ - -static void -symbol_printers_output (FILE *out) -{ - int i; - char const *sep = ""; - - fputs ("m4_define([b4_symbol_printers], \n[", out); - for (i = 0; i < nsyms; ++i) - if (symbol_printer_get (symbols[i])) - { - symbol *sym = symbols[i]; - - /* Filename, lineno, - Symbol-name, Symbol-number, - printer, optional typename. */ - fprintf (out, "%s[", sep); - sep = ",\n"; - escaped_output (out, symbol_printer_location_get (sym).start.file); - fprintf (out, ", %d, ", symbol_printer_location_get (sym).start.line); - escaped_output (out, sym->tag); - fprintf (out, ", %d, [[%s]]", sym->number, symbol_printer_get (sym)); - if (sym->type_name) - fprintf (out, ", [[%s]]", sym->type_name); - fputc (']', out); - } + { + symbol *sym = symbols[i]; + char const *code = (*get) (sym)->code; + if (code) + { + location loc = (*get) (sym)->location; + /* Filename, lineno, + Symbol-name, Symbol-number, + code, optional typename. */ + fprintf (out, "%s[", sep); + sep = ",\n"; + escaped_output (out, loc.start.file); + fprintf (out, ", %d, ", loc.start.line); + escaped_output (out, sym->tag); + fprintf (out, ", %d, [[%s]]", sym->number, code); + if (sym->type_name) + fprintf (out, ", [[%s]]", sym->type_name); + fputc (']', out); + } + } fputs ("])\n\n", out); } @@ -487,6 +573,26 @@ prepare_actions (void) 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_code_props_output (out, "destructors", &symbol_destructor_get); + symbol_code_props_output (out, "printers", &symbol_printer_get); + symbol_definitions_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. | @@ -496,21 +602,19 @@ static void output_skeleton (void) { FILE *in; - FILE *out; int filter_fd[2]; - char const *argv[6]; + char const *argv[9]; 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_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] == '/') @@ -518,50 +622,83 @@ output_skeleton (void) full_skeleton = xmalloc (pkgdatadirlen + 1 + (skeleton_size < sizeof m4sugar ? sizeof m4sugar : skeleton_size)); - strcpy (full_skeleton, pkgdatadir); + strncpy (full_skeleton, pkgdatadir, pkgdatadirlen); full_skeleton[pkgdatadirlen] = '/'; strcpy (full_skeleton + pkgdatadirlen + 1, m4sugar); full_m4sugar = xstrdup (full_skeleton); - strcpy (full_skeleton + pkgdatadirlen + 1, 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\n", - m4, full_m4sugar, full_skeleton); + 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_skeleton; - argv[4] = trace_flag & trace_m4 ? "-dV" : NULL; - argv[5] = NULL; + /* Some future version of GNU M4 (most likely 1.6) may treat the -dV in a + position-dependent manner. Keep it as the first argument so that all + files are traced. + See the thread starting at + + for details. */ + { + int i = 0; + argv[i++] = m4; + 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; + } + /* 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 + + for details. */ + unsetenv ("POSIXLY_CORRECT"); init_subpipe (); pid = create_subpipe (argv, 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_destructors_output (out); - symbol_printers_output (out); - - muscles_m4_output (out); - - fputs ("m4_wrap([m4_divert_pop(0)])\n", out); - fputs ("m4_divert_push(0)dnl\n", out); - xfclose (out); + if (trace_flag & trace_muscles) + muscles_output (stderr); + { + FILE *out = fdopen (filter_fd[0], "w"); + if (! out) + error (EXIT_FAILURE, get_errno (), + "fdopen"); + muscles_output (out); + xfclose (out); + } /* Read and process m4's output. */ timevar_push (TV_M4); @@ -579,18 +716,33 @@ output_skeleton (void) 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_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 ("pure_flag", pure_parser); + MUSCLE_INSERT_BOOL ("nondeterministic_flag", nondeterministic_parser); MUSCLE_INSERT_BOOL ("synclines_flag", !no_lines_flag); MUSCLE_INSERT_BOOL ("tag_seen_flag", tag_seen); + MUSCLE_INSERT_BOOL ("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"); + 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); @@ -602,26 +754,18 @@ prepare (void) DEFINE (spec_verbose_file); #undef DEFINE - /* 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"; - } + /* 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. */ + /* About the skeletons. */ { - char const *pkgdatadir = getenv ("BISON_PKGDATADIR"); - MUSCLE_INSERT_STRING ("pkgdatadir", pkgdatadir ? pkgdatadir : PKGDATADIR); - MUSCLE_INSERT_C_STRING ("skeleton", skeleton); + /* 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 ()); } } @@ -646,6 +790,11 @@ 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; }