-/* Output the generated parsing program for bison,
- Copyright (C) 1984, 1986, 1989, 1992 Free Software Foundation, Inc.
+/* Output the generated parsing program for Bison.
-This file is part of Bison, the GNU Compiler Compiler.
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
-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 file is part of Bison, the GNU Compiler Compiler.
-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 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.
-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. */
+ 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 this program. If not, see <http://www.gnu.org/licenses/>. */
-/* functions to output parsing data to various files. Entries are:
-
- output_headers ()
-
-Output constant strings to the beginning of certain files.
-
- output_trailers()
-
-Output constant strings to the ends of certain files.
-
- output ()
-
-Output the parsing tables and the parser code to ftable.
-
-The parser tables consist of these tables.
-Starred ones needed only for the semantic parser.
-Double starred are output only if switches are set.
-
-yytranslate = vector mapping yylex's token numbers into bison's token numbers.
-
-** yytname = vector of string-names indexed by bison token number
-
-** yytoknum = vector of yylex token numbers corresponding to entries in yytname
-
-yyrline = vector of line-numbers of all rules. For yydebug printouts.
-
-yyrhs = vector of items of all rules.
- This is exactly what ritems contains. For yydebug and for semantic
- parser.
-
-yyprhs[r] = index in yyrhs of first item for rule r.
-
-yyr1[r] = symbol number of symbol that rule r derives.
-
-yyr2[r] = number of symbols composing right hand side of rule r.
-
-* yystos[s] = the symbol number of the symbol that leads to state s.
-
-yydefact[s] = default rule to reduce with in state s,
- when yytable doesn't specify something else to do.
- Zero means the default is an error.
-
-yydefgoto[i] = default state to go to after a reduction of a rule that
- generates variable ntokens + i, except when yytable
- specifies something else to do.
-
-yypact[s] = index in yytable of the portion describing state s.
- The lookahead token's type is used to index that portion
- to find out what to do.
-
- If the value in yytable is positive,
- we shift the token and go to that state.
-
- If the value is negative, it is minus a rule number to reduce by.
-
- If the value is zero, the default action from yydefact[s] is used.
-
-yypgoto[i] = the index in yytable of the portion describing
- what to do after reducing a rule that derives variable i + ntokens.
- This portion is indexed by the parser state number, s,
- as of before the text for this nonterminal was read.
- The value from yytable is the state to go to if
- the corresponding value in yycheck is s.
-
-yytable = a vector filled with portions for different uses,
- found via yypact and yypgoto.
-
-yycheck = a vector indexed in parallel with yytable.
- It indicates, in a roundabout way, the bounds of the
- portion you are trying to examine.
-
- Suppose that the portion of yytable starts at index p
- and the index to be examined within the portion is i.
- Then if yycheck[p+i] != i, i is outside the bounds
- of what is actually allocated, and the default
- (from yydefact or yydefgoto) should be used.
- Otherwise, yytable[p+i] should be used.
-
-YYFINAL = the state number of the termination state.
-YYFLAG = most negative short int. Used to flag ??
-YYNTBASE = ntokens.
+#include <config.h>
+#include "system.h"
-*/
+#include <configmake.h>
+#include <error.h>
+#include <get-errno.h>
+#include <quotearg.h>
+#include <subpipe.h>
+#include <timevar.h>
-#include <stdio.h>
-#include "system.h"
-#include "machine.h"
-#include "alloc.h"
+#include "complain.h"
#include "files.h"
+#include "getargs.h"
#include "gram.h"
-#include "state.h"
-
-
-extern int debugflag;
-extern int nolinesflag;
-extern int noparserflag;
-extern int toknumflag;
-
-extern char **tags;
-extern int *user_toknums;
-extern int tokensetsize;
-extern int final_state;
-extern core **state_table;
-extern shifts **shift_table;
-extern errs **err_table;
-extern reductions **reduction_table;
-extern short *accessing_symbol;
-extern unsigned *LA;
-extern short *LAruleno;
-extern short *lookaheads;
-extern char *consistent;
-extern short *goto_map;
-extern short *from_state;
-extern short *to_state;
-extern int lineno;
-
-void output_headers PARAMS((void));
-void output_trailers PARAMS((void));
-void output PARAMS((void));
-void output_token_translations PARAMS((void));
-void output_gram PARAMS((void));
-void output_stos PARAMS((void));
-void output_rule_data PARAMS((void));
-void output_defines PARAMS((void));
-void output_actions PARAMS((void));
-void token_actions PARAMS((void));
-void save_row PARAMS((int));
-void goto_actions PARAMS((void));
-void save_column PARAMS((int, int));
-void sort_actions PARAMS((void));
-void pack_table PARAMS((void));
-void output_base PARAMS((void));
-void output_table PARAMS((void));
-void output_check PARAMS((void));
-void output_parser PARAMS((void));
-void output_program PARAMS((void));
-void free_shifts PARAMS((void));
-void free_reductions PARAMS((void));
-void free_itemsets PARAMS((void));
-int action_row PARAMS((int));
-int default_goto PARAMS((int));
-int matching_state PARAMS((int));
-int pack_vector PARAMS((int));
-
-extern void berror PARAMS((char *));
-extern void fatals PARAMS((char *, char *));
-extern char *int_to_string PARAMS((int));
-extern void reader_output_yylsp PARAMS((FILE *));
-
-static int nvectors;
-static int nentries;
-static short **froms;
-static short **tos;
-static short *tally;
-static short *width;
-static short *actrow;
-static short *state_count;
-static short *order;
-static short *base;
-static short *pos;
-static short *table;
-static short *check;
-static int lowzero;
-static int high;
-
-
-
-#define GUARDSTR "\n#include \"%s\"\nextern int yyerror;\n\
-extern int yycost;\nextern char * yymsg;\nextern YYSTYPE yyval;\n\n\
-yyguard(n, yyvsp, yylsp)\nregister int n;\nregister YYSTYPE *yyvsp;\n\
-register YYLTYPE *yylsp;\n\
-{\n yyerror = 0;\nyycost = 0;\n yymsg = 0;\nswitch (n)\n {"
-
-#define ACTSTR "\n#include \"%s\"\nextern YYSTYPE yyval;\
-\nextern int yychar;\
-yyaction(n, yyvsp, yylsp)\nregister int n;\nregister YYSTYPE *yyvsp;\n\
-register YYLTYPE *yylsp;\n{\n switch (n)\n{"
-
-#define ACTSTR_SIMPLE "\n switch (yyn) {\n"
-
-
-void
-output_headers (void)
-{
- if (semantic_parser)
- fprintf(fguard, GUARDSTR, attrsfile);
-
- if (noparserflag)
- return;
-
- fprintf(faction, (semantic_parser ? ACTSTR : ACTSTR_SIMPLE), attrsfile);
-/* if (semantic_parser) JF moved this below
- fprintf(ftable, "#include \"%s\"\n", attrsfile);
- fprintf(ftable, "#include <stdio.h>\n\n");
-*/
-
- /* Rename certain symbols if -p was specified. */
- if (spec_name_prefix)
- {
- fprintf(ftable, "#define yyparse %sparse\n", spec_name_prefix);
- fprintf(ftable, "#define yylex %slex\n", spec_name_prefix);
- fprintf(ftable, "#define yyerror %serror\n", spec_name_prefix);
- fprintf(ftable, "#define yylval %slval\n", spec_name_prefix);
- fprintf(ftable, "#define yychar %schar\n", spec_name_prefix);
- fprintf(ftable, "#define yydebug %sdebug\n", spec_name_prefix);
- fprintf(ftable, "#define yynerrs %snerrs\n", spec_name_prefix);
- }
-}
-
-
-void
-output_trailers (void)
-{
- if (semantic_parser)
- fprintf(fguard, "\n }\n}\n");
-
- fprintf(faction, "\n");
-
- if (noparserflag)
- return;
-
- if (semantic_parser)
- fprintf(faction, " }\n");
- fprintf(faction, "}\n");
-}
-
-
-void
-output (void)
-{
- int c;
-
- /* output_token_defines(ftable); / * JF put out token defines FIRST */
- if (!semantic_parser) /* JF Put out other stuff */
- {
- rewind(fattrs);
- while ((c=getc(fattrs))!=EOF)
- putc(c,ftable);
- }
- reader_output_yylsp(ftable);
- if (debugflag)
- fprintf(ftable, "#ifndef YYDEBUG\n#define YYDEBUG %d\n#endif\n\n",
- !!debugflag);
-
- if (semantic_parser)
- fprintf(ftable, "#include \"%s\"\n", attrsfile);
-
- if (! noparserflag)
- fprintf(ftable, "#include <stdio.h>\n\n");
-
- /* Make "const" do nothing if not in ANSI C. */
- fprintf (ftable, "#ifndef __cplusplus\n#ifndef __STDC__\n#define const\n#endif\n#endif\n\n");
-
- free_itemsets();
- output_defines();
- output_token_translations();
-/* if (semantic_parser) */
- /* This is now unconditional because debugging printouts can use it. */
- output_gram();
- FREE(ritem);
- if (semantic_parser)
- output_stos();
- output_rule_data();
- output_actions();
- if (! noparserflag)
- output_parser();
- output_program();
+#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"
+
+
+static struct obstack format_obstack;
+
+
+/*-------------------------------------------------------------------.
+| Create a function NAME which associates to the muscle NAME the |
+| result of formatting the FIRST and then TABLE_DATA[BEGIN..END[ (of |
+| TYPE), and to the muscle NAME_max, the max value of the |
+| TABLE_DATA. |
+`-------------------------------------------------------------------*/
+
+
+#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); \
}
+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_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)
-void
-output_token_translations (void)
-{
- register int i, j;
-/* register short *sp; JF unused */
- if (translations)
- {
- fprintf(ftable,
- "\n#define YYTRANSLATE(x) ((unsigned)(x) <= %d ? yytranslate[x] : %d)\n",
- max_user_token_number, nsyms);
-
- if (ntokens < 127) /* play it very safe; check maximum element value. */
- fprintf(ftable, "\nstatic const char yytranslate[] = { 0");
- else
- fprintf(ftable, "\nstatic const short yytranslate[] = { 0");
-
- j = 10;
- for (i = 1; i <= max_user_token_number; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", token_translations[i]);
- }
-
- fprintf(ftable, "\n};\n");
- }
- else
- {
- fprintf(ftable, "\n#define YYTRANSLATE(x) (x)\n");
- }
-}
+/*--------------------------------------------------------------------.
+| Print to OUT a representation of STRING escaped both for C and M4. |
+`--------------------------------------------------------------------*/
-
-void
-output_gram (void)
+static void
+escaped_output (FILE *out, char const *string)
{
- register int i;
- register int j;
- register short *sp;
+ char const *p;
+ fprintf (out, "[[");
- /* With the ordinary parser,
- yyprhs and yyrhs are needed only for yydebug. */
- /* With the noparser option, all tables are generated */
- if (! semantic_parser && ! noparserflag)
- fprintf(ftable, "\n#if YYDEBUG != 0");
-
- fprintf(ftable, "\nstatic const short yyprhs[] = { 0");
-
- j = 10;
- for (i = 1; i <= nrules; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", rrhs[i]);
- }
-
- fprintf(ftable, "\n};\n");
-
- fprintf(ftable, "\nstatic const short yyrhs[] = {%6d", ritem[0]);
-
- j = 10;
- for (sp = ritem + 1; *sp; sp++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- if (*sp > 0)
- fprintf(ftable, "%6d", *sp);
- else
- fprintf(ftable, " 0");
- }
-
- fprintf(ftable, "\n};\n");
+ for (p = quotearg_style (c_quoting_style, string); *p; p++)
+ switch (*p)
+ {
+ case '$': fputs ("$][", out); break;
+ case '@': fputs ("@@", out); break;
+ case '[': fputs ("@{", out); break;
+ case ']': fputs ("@}", out); break;
+ default: fputc (*p, out); break;
+ }
- if (! semantic_parser && ! noparserflag)
- fprintf(ftable, "\n#endif\n");
+ fprintf (out, "]]");
}
-void
-output_stos (void)
-{
- register int i;
- register int j;
-
- fprintf(ftable, "\nstatic const short yystos[] = { 0");
-
- j = 10;
- for (i = 1; i < nstates; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+/*------------------------------------------------------------------.
+| Prepare the muscles related to the symbols: translate, tname, and |
+| toknum. |
+`------------------------------------------------------------------*/
- fprintf(ftable, "%6d", accessing_symbol[i]);
- }
-
- fprintf(ftable, "\n};\n");
-}
-
-
-void
-output_rule_data (void)
+static void
+prepare_symbols (void)
{
- register int i;
- register int j;
-
- fprintf(ftable, "\n#if YYDEBUG != 0\n");
- fprintf(ftable, "static const short yyrline[] = { 0");
-
- j = 10;
- for (i = 1; i <= nrules; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", rline[i]);
- }
- fprintf(ftable, "\n};\n#endif\n\n");
-
- if (toknumflag || noparserflag)
- {
- fprintf(ftable, "#define YYNTOKENS %d\n", ntokens);
- fprintf(ftable, "#define YYNNTS %d\n", nvars);
- fprintf(ftable, "#define YYNRULES %d\n", nrules);
- fprintf(ftable, "#define YYNSTATES %d\n", nstates);
- fprintf(ftable, "#define YYMAXUTOK %d\n\n", max_user_token_number);
- }
-
- if (! toknumflag && ! noparserflag)
- fprintf(ftable, "\n#if YYDEBUG != 0 || defined (YYERROR_VERBOSE)\n\n");
-
- /* Output the table of symbol names. */
-
- fprintf(ftable,
- "static const char * const yytname[] = { \"%s\"",
- tags[0]);
-
- j = strlen (tags[0]) + 44;
- for (i = 1; i < nsyms; i++)
- /* this used to be i<=nsyms, but that output a final "" symbol
- almost by accident */
- {
- register char *p;
- putc(',', ftable);
- j++;
-
- if (j > 75)
- {
- putc('\n', ftable);
- j = 0;
- }
-
- putc ('\"', ftable);
- j++;
-
- for (p = tags[i]; p && *p; p++)
- {
- if (*p == '"' || *p == '\\')
- {
- fprintf(ftable, "\\%c", *p);
- j += 2;
- }
- else if (*p == '\n')
- {
- fprintf(ftable, "\\n");
- j += 2;
- }
- else if (*p == '\t')
- {
- fprintf(ftable, "\\t");
- j += 2;
- }
- else if (*p == '\b')
- {
- fprintf(ftable, "\\b");
- j += 2;
- }
- else if (*p < 040 || *p >= 0177)
- {
- fprintf(ftable, "\\%03o", *p);
- j += 4;
- }
- else
- {
- putc(*p, ftable);
- j++;
- }
- }
-
- putc ('\"', ftable);
- j++;
- }
- fprintf(ftable, ", NULL\n};\n"); /* add a NULL entry to list of tokens */
+ MUSCLE_INSERT_BOOL ("token_table", token_table_flag);
+ MUSCLE_INSERT_INT ("tokens_number", ntokens);
+ MUSCLE_INSERT_INT ("nterms_number", nvars);
+ MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
+ 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);
+
+ /* 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 *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 (! toknumflag && ! noparserflag)
- fprintf(ftable, "#endif\n\n");
+ if (j + width > 75)
+ {
+ obstack_sgrow (&format_obstack, "\n ");
+ j = 1;
+ }
- if (toknumflag)
- {
- fprintf(ftable, "static const short yytoknum[] = { 0");
- j = 10;
- for (i = 1; i <= ntokens; i++) {
- putc(',', ftable);
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- j++;
- fprintf(ftable, "%6d", user_toknums[i]);
+ if (i)
+ obstack_1grow (&format_obstack, ' ');
+ MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
+ free (cp);
+ obstack_1grow (&format_obstack, ',');
+ j += width;
}
- fprintf(ftable, "\n};\n\n");
- }
-
- fprintf(ftable, "static const short yyr1[] = { 0");
-
- j = 10;
- for (i = 1; i <= nrules; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", rlhs[i]);
- }
-
- FREE(rlhs + 1);
-
- fprintf(ftable, "\n};\n\nstatic const short yyr2[] = { 0");
-
- j = 10;
- for (i = 1; i < nrules; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", rrhs[i + 1] - rrhs[i] - 1);
- }
-
- putc(',', ftable);
- if (j >= 10)
- putc('\n', ftable);
-
- fprintf(ftable, "%6d\n};\n", nitems - rrhs[nrules] - 1);
- FREE(rrhs + 1);
-}
+ free (qo);
+ obstack_sgrow (&format_obstack, " ]b4_null[");
+ /* Finish table and store. */
+ obstack_1grow (&format_obstack, 0);
+ muscle_insert ("tname", obstack_finish (&format_obstack));
+ }
-void
-output_defines (void)
-{
- fprintf(ftable, "\n\n#define\tYYFINAL\t\t%d\n", final_state);
- fprintf(ftable, "#define\tYYFLAG\t\t%d\n", MINSHORT);
- fprintf(ftable, "#define\tYYNTBASE\t%d\n", ntokens);
+ /* Output YYTOKNUM. */
+ {
+ int i;
+ 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);
+ free (values);
+ }
}
+/*-------------------------------------------------------------.
+| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
+| rline, dprec, merger. |
+`-------------------------------------------------------------*/
-/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable and yycheck. */
-
-void
-output_actions (void)
+static void
+prepare_rules (void)
{
- nvectors = nstates + nvars;
-
- froms = NEW2(nvectors, short *);
- tos = NEW2(nvectors, short *);
- tally = NEW2(nvectors, short);
- width = NEW2(nvectors, short);
-
- token_actions();
- free_shifts();
- free_reductions();
- FREE(lookaheads);
- FREE(LA);
- FREE(LAruleno);
- FREE(accessing_symbol);
-
- goto_actions();
- FREE(goto_map + ntokens);
- FREE(from_state);
- FREE(to_state);
-
- sort_actions();
- pack_table();
- output_base();
- output_table();
- output_check();
+ 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);
+
+ 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;
+ /* 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;
+ }
+ 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 ("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);
}
+/*--------------------------------------------.
+| Prepare the muscles related to the states. |
+`--------------------------------------------*/
-
-/* figure out the actions for the specified state, indexed by lookahead token type.
-
- The yydefact table is output now. The detailed info
- is saved for putting into yytable later. */
-
-void
-token_actions (void)
+static void
+prepare_states (void)
{
- register int i;
- register int j;
- register int k;
-
- actrow = NEW2(ntokens, short);
-
- k = action_row(0);
- fprintf(ftable, "\nstatic const short yydefact[] = {%6d", k);
- save_row(0);
-
- j = 10;
- for (i = 1; i < nstates; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- k = action_row(i);
- fprintf(ftable, "%6d", k);
- save_row(i);
- }
-
- fprintf(ftable, "\n};\n");
- FREE(actrow);
+ 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);
+ free (values);
+
+ MUSCLE_INSERT_INT ("last", high);
+ MUSCLE_INSERT_INT ("final_state_number", final_state->number);
+ MUSCLE_INSERT_INT ("states_number", nstates);
}
-/* Decide what to do for each type of token if seen as the lookahead token in specified state.
- The value returned is used as the default action (yydefact) for the state.
- In addition, actrow is filled with what to do for each kind of token,
- index by symbol number, with zero meaning do the default action.
- The value MINSHORT, a very negative number, means this situation
- is an error. The parser recognizes this value specially.
-
- This is where conflicts are resolved. The loop over lookahead rules
- considered lower-numbered rules last, and the last rule considered that likes
- a token gets to handle it. */
+/*---------------------------------.
+| Output the user actions to OUT. |
+`---------------------------------*/
-int
-action_row (int state)
+static void
+user_actions_output (FILE *out)
{
- register int i;
- register int j;
- register int k;
- register int m = 0;
- register int n = 0;
- register int count;
- register int default_rule;
- register int nreds;
- register int max;
- register int rule;
- register int shift_state;
- register int symbol;
- register unsigned mask;
- register unsigned *wordp;
- register reductions *redp;
- register shifts *shiftp;
- register errs *errp;
- int nodefault = 0; /* set nonzero to inhibit having any default reduction */
-
- for (i = 0; i < ntokens; i++)
- actrow[i] = 0;
-
- default_rule = 0;
- nreds = 0;
- redp = reduction_table[state];
-
- if (redp)
- {
- nreds = redp->nreds;
-
- if (nreds >= 1)
- {
- /* loop over all the rules available here which require lookahead */
- m = lookaheads[state];
- n = lookaheads[state + 1];
-
- for (i = n - 1; i >= m; i--)
- {
- rule = - LAruleno[i];
- wordp = LA + i * tokensetsize;
- mask = 1;
-
- /* and find each token which the rule finds acceptable to come next */
- for (j = 0; j < ntokens; j++)
- {
- /* and record this rule as the rule to use if that token follows. */
- if (mask & *wordp)
- actrow[j] = rule;
-
- mask <<= 1;
- if (mask == 0)
- {
- mask = 1;
- wordp++;
- }
- }
- }
- }
- }
-
- shiftp = shift_table[state];
-
- /* now see which tokens are allowed for shifts in this state.
- For them, record the shift as the thing to do. So shift is preferred to reduce. */
-
- if (shiftp)
- {
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- shift_state = shiftp->shifts[i];
- if (! shift_state) continue;
-
- symbol = accessing_symbol[shift_state];
-
- if (ISVAR(symbol))
- break;
-
- actrow[symbol] = shift_state;
-
- /* do not use any default reduction if there is a shift for error */
-
- if (symbol == error_token_number) nodefault = 1;
- }
- }
-
- errp = err_table[state];
-
- /* See which tokens are an explicit error in this state
- (due to %nonassoc). For them, record MINSHORT as the action. */
-
- if (errp)
- {
- k = errp->nerrs;
-
- for (i = 0; i < k; i++)
- {
- symbol = errp->errs[i];
- actrow[symbol] = MINSHORT;
- }
- }
+ rule_number r;
- /* now find the most common reduction and make it the default action for this state. */
-
- if (nreds >= 1 && ! nodefault)
- {
- if (consistent[state])
- default_rule = redp->rules[0];
- else
- {
- max = 0;
- for (i = m; i < n; i++)
- {
- count = 0;
- rule = - LAruleno[i];
-
- for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == rule)
- count++;
- }
-
- if (count > max)
- {
- max = count;
- default_rule = rule;
- }
- }
-
- /* actions which match the default are replaced with zero,
- which means "use the default" */
-
- if (max > 0)
- {
- for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == default_rule)
- actrow[j] = 0;
- }
-
- default_rule = - default_rule;
- }
- }
- }
-
- /* If have no default rule, the default is an error.
- So replace any action which says "error" with "use default". */
-
- if (default_rule == 0)
- for (j = 0; j < ntokens; j++)
+ fputs ("m4_define([b4_actions], \n[", out);
+ for (r = 0; r < nrules; ++r)
+ if (rules[r].action)
{
- if (actrow[j] == MINSHORT)
- actrow[j] = 0;
+ 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);
}
-
- return (default_rule);
+ fputs ("])\n\n", out);
}
+/*--------------------------------------.
+| Output the merge functions to OUT. |
+`--------------------------------------*/
-void
-save_row (int state)
+static void
+merger_output (FILE *out)
{
- register int i;
- register int count;
- register short *sp;
- register short *sp1;
- register short *sp2;
-
- count = 0;
- for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- count++;
- }
-
- if (count == 0)
- return;
+ int n;
+ merger_list* p;
- froms[state] = sp1 = sp = NEW2(count, short);
- tos[state] = sp2 = NEW2(count, short);
-
- for (i = 0; i < ntokens; i++)
+ fputs ("m4_define([b4_mergers], \n[[", out);
+ for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)
{
- if (actrow[i] != 0)
- {
- *sp1++ = i;
- *sp2++ = actrow[i];
- }
- }
-
- tally[state] = count;
- width[state] = sp1[-1] - sp[0] + 1;
-}
-
-
-
-/* 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.
-
- The yydefgoto table is output now. The detailed info
- is saved for putting into yytable later. */
-
-void
-goto_actions (void)
-{
- register int i;
- register int j;
- register int k;
-
- state_count = NEW2(nstates, short);
-
- k = default_goto(ntokens);
- fprintf(ftable, "\nstatic const short yydefgoto[] = {%6d", k);
- save_column(ntokens, k);
-
- j = 10;
- for (i = ntokens + 1; i < nsyms; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
+ if (p->type[0] == '\0')
+ fprintf (out, " case %d: *yy0 = %s (*yy0, *yy1); break;\n",
+ n, p->name);
else
- {
- j++;
- }
-
- k = default_goto(i);
- fprintf(ftable, "%6d", k);
- save_column(i, k);
- }
-
- fprintf(ftable, "\n};\n");
- FREE(state_count);
-}
-
-
-
-int
-default_goto (int symbol)
-{
- register int i;
- register int m;
- register int n;
- register int default_state;
- register int max;
-
- m = goto_map[symbol];
- n = goto_map[symbol + 1];
-
- if (m == n)
- return (-1);
-
- for (i = 0; i < nstates; i++)
- state_count[i] = 0;
-
- for (i = m; i < n; i++)
- state_count[to_state[i]]++;
-
- max = 0;
- default_state = -1;
-
- for (i = 0; i < nstates; i++)
- {
- if (state_count[i] > max)
- {
- max = state_count[i];
- default_state = i;
- }
- }
-
- return (default_state);
-}
-
-
-void
-save_column (int symbol, int default_state)
-{
- register int i;
- register int m;
- register int n;
- register short *sp;
- register short *sp1;
- register short *sp2;
- register int count;
- register int symno;
-
- m = goto_map[symbol];
- n = goto_map[symbol + 1];
-
- count = 0;
- for (i = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- count++;
- }
-
- if (count == 0)
- return;
-
- symno = symbol - ntokens + nstates;
-
- froms[symno] = sp1 = sp = NEW2(count, short);
- tos[symno] = sp2 = NEW2(count, short);
-
- for (i = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- {
- *sp1++ = from_state[i];
- *sp2++ = to_state[i];
- }
+ fprintf (out, " case %d: yy0->%s = %s (*yy0, *yy1); break;\n",
+ n, p->type, p->name);
}
-
- tally[symno] = count;
- width[symno] = sp1[-1] - sp[0] + 1;
+ fputs ("]])\n\n", out);
}
+/*--------------------------------------.
+| Output the tokens definition to OUT. |
+`--------------------------------------*/
-
-/* the next few functions decide how to pack
- the actions and gotos information into yytable. */
-
-void
-sort_actions (void)
+static void
+token_definitions_output (FILE *out)
{
- register int i;
- register int j;
- register int k;
- register int t;
- register int w;
-
- order = NEW2(nvectors, short);
- nentries = 0;
-
- for (i = 0; i < nvectors; i++)
- {
- if (tally[i] > 0)
- {
- t = tally[i];
- w = width[i];
- j = nentries - 1;
-
- while (j >= 0 && (width[order[j]] < w))
- j--;
-
- while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
- j--;
-
- for (k = nentries - 1; k > j; k--)
- order[k + 1] = order[k];
-
- order[j + 1] = i;
- nentries++;
- }
- }
-}
-
-
-void
-pack_table (void)
-{
- register int i;
- register int place;
- register int state;
-
- base = NEW2(nvectors, short);
- pos = NEW2(nentries, short);
- table = NEW2(MAXTABLE, short);
- check = NEW2(MAXTABLE, short);
-
- lowzero = 0;
- high = 0;
-
- for (i = 0; i < nvectors; i++)
- base[i] = MINSHORT;
-
- for (i = 0; i < MAXTABLE; i++)
- check[i] = -1;
-
- for (i = 0; i < nentries; i++)
- {
- state = matching_state(i);
-
- if (state < 0)
- place = pack_vector(i);
- else
- place = base[state];
-
- pos[i] = place;
- base[order[i]] = place;
- }
+ int i;
+ char const *sep = "";
- for (i = 0; i < nvectors; i++)
+ fputs ("m4_define([b4_tokens], \n[", out);
+ for (i = 0; i < ntokens; ++i)
{
- if (froms[i])
- FREE(froms[i]);
- if (tos[i])
- FREE(tos[i]);
- }
-
- FREE(froms);
- FREE(tos);
- FREE(pos);
-}
-
-
-
-int
-matching_state (int vector)
-{
- register int i;
- register int j;
- register int k;
- register int t;
- register int w;
- register int match;
- register int prev;
-
- i = order[vector];
- if (i >= nstates)
- return (-1);
-
- t = tally[i];
- w = width[i];
-
- for (prev = vector - 1; prev >= 0; prev--)
- {
- j = order[prev];
- if (width[j] != w || tally[j] != t)
- return (-1);
-
- match = 1;
- for (k = 0; match && k < t; k++)
- {
- if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k])
- match = 0;
- }
-
- if (match)
- return (j);
- }
-
- return (-1);
-}
+ 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;
-int
-pack_vector (int vector)
-{
- register int i;
- register int j;
- register int k;
- register int t;
- register int loc = 0;
- register int ok;
- register short *from;
- register short *to;
-
- i = order[vector];
- t = tally[i];
+ /* If this string has an alias, then it is necessarily the alias
+ which is to be output. */
+ if (sym->alias)
+ sym = sym->alias;
- if (t == 0)
- berror("pack_vector");
+ /* 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;
- from = froms[i];
- to = tos[i];
+ /* 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;
- for (j = lowzero - from[0]; j < MAXTABLE; j++)
- {
- ok = 1;
-
- for (k = 0; ok && k < t; k++)
- {
- loc = j + from[k];
- if (loc > MAXTABLE)
- fatals(_("maximum table size (%s) exceeded"), int_to_string(MAXTABLE));
-
- if (table[loc] != 0)
- ok = 0;
- }
-
- for (k = 0; ok && k < vector; k++)
- {
- if (pos[k] == j)
- ok = 0;
- }
-
- if (ok)
- {
- for (k = 0; k < t; k++)
- {
- loc = j + from[k];
- table[loc] = to[k];
- check[loc] = from[k];
- }
-
- while (table[lowzero] != 0)
- lowzero++;
-
- if (loc > high)
- high = loc;
-
- return (j);
- }
+ fprintf (out, "%s[[[%s]], %d]",
+ sep, sym->tag, number);
+ sep = ",\n";
}
-
- berror("pack_vector");
- return 0; /* JF keep lint happy */
+ fputs ("])\n\n", out);
}
+/*---------------------------------------------------.
+| Output the symbol destructors or printers to OUT. |
+`---------------------------------------------------*/
-/* the following functions output yytable, yycheck
- and the vectors whose elements index the portion starts */
-
-void
-output_base (void)
+static void
+symbol_code_props_output (FILE *out, char const *what,
+ code_props const *(*get)(symbol const *))
{
- register int i;
- register int j;
-
- fprintf(ftable, "\nstatic const short yypact[] = {%6d", base[0]);
-
- j = 10;
- for (i = 1; i < nstates; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", base[i]);
- }
-
- fprintf(ftable, "\n};\n\nstatic const short yypgoto[] = {%6d", base[nstates]);
-
- j = 10;
- for (i = nstates + 1; i < nvectors; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", base[i]);
- }
-
- fprintf(ftable, "\n};\n");
- FREE(base);
+ int i;
+ char const *sep = "";
+
+ 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);
+ }
+ }
+ fputs ("])\n\n", out);
}
-void
-output_table (void)
+static void
+prepare_actions (void)
{
- register int i;
- register int j;
-
- fprintf(ftable, "\n\n#define\tYYLAST\t\t%d\n\n", high);
- fprintf(ftable, "\nstatic const short yytable[] = {%6d", table[0]);
-
- j = 10;
- for (i = 1; i <= high; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", table[i]);
- }
-
- fprintf(ftable, "\n};\n");
- FREE(table);
+ /* Figure out the actions for the specified state, indexed by
+ lookahead token type. */
+
+ muscle_insert_rule_number_table ("defact", yydefact,
+ 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);
+
+
+ /* Output PACT. */
+ muscle_insert_base_table ("pact", base,
+ base[0], 1, nstates);
+ MUSCLE_INSERT_INT ("pact_ninf", base_ninf);
+
+ /* Output PGOTO. */
+ muscle_insert_base_table ("pgoto", base,
+ base[nstates], nstates + 1, nvectors);
+
+ muscle_insert_base_table ("table", table,
+ table[0], 1, high + 1);
+ MUSCLE_INSERT_INT ("table_ninf", table_ninf);
+
+ muscle_insert_base_table ("check", check,
+ check[0], 1, high + 1);
+
+ /* GLR parsing slightly modifies YYTABLE and YYCHECK (and thus
+ YYPACT) so that in states with unresolved conflicts, the default
+ reduction is not used in the conflicted entries, so that there is
+ a place to put a conflict pointer.
+
+ This means that YYCONFLP and YYCONFL are nonsense for a non-GLR
+ parser, so we could avoid accidents by not writing them out in
+ 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);
+ muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
+ 0, 1, conflict_list_cnt);
}
+\f
+/*---------------------------.
+| Call the skeleton parser. |
+`---------------------------*/
-void
-output_check (void)
+static void
+output_skeleton (void)
{
- register int i;
- register int j;
-
- fprintf(ftable, "\nstatic const short yycheck[] = {%6d", check[0]);
-
- j = 10;
- for (i = 1; i <= high; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", check[i]);
- }
-
- fprintf(ftable, "\n};\n");
- FREE(check);
+ FILE *in;
+ FILE *out;
+ int filter_fd[2];
+ char const *argv[9];
+ pid_t pid;
+
+ /* 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 = compute_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));
+ 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_m4bison, full_skeleton);
+
+ /* 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
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ 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
+ <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>
+ for details. */
+ unsetenv ("POSIXLY_CORRECT");
+ init_subpipe ();
+ pid = create_subpipe (argv, filter_fd);
+ free (full_m4sugar);
+ free (full_m4bison);
+ free (full_skeleton);
+
+ out = fdopen (filter_fd[0], "w");
+ if (! out)
+ error (EXIT_FAILURE, get_errno (),
+ "fdopen");
+
+ /* Output the definitions of all the muscles. */
+ fputs ("m4_init()\n", out);
+
+ user_actions_output (out);
+ merger_output (out);
+ token_definitions_output (out);
+ symbol_code_props_output (out, "destructors", &symbol_destructor_get);
+ symbol_code_props_output (out, "printers", &symbol_printer_get);
+
+ muscles_m4_output (out);
+ xfclose (out);
+
+ /* 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);
+ timevar_pop (TV_M4);
}
-
-
-/* copy the parser code into the ftable file at the end. */
-
-void
-output_parser (void)
+static void
+prepare (void)
{
- register int c;
-#ifdef DONTDEF
- FILE *fpars;
-#else
-#define fpars fparser
-#endif
-
- if (pure_parser)
- fprintf(ftable, "#define YYPURE 1\n\n");
-
-#ifdef DONTDEF /* JF no longer needed 'cuz open_extra_files changes the
- currently open parser from bison.simple to bison.hairy */
- if (semantic_parser)
- fpars = fparser;
- else fpars = fparser1;
-#endif
-
- /* Loop over lines in the standard parser file. */
-
- while (1)
- {
- int write_line = 1;
-
- c = getc(fpars);
-
- /* See if the line starts with `#line.
- If so, set write_line to 0. */
- if (nolinesflag)
- if (c == '#')
- {
- c = getc(fpars);
- if (c == 'l')
- {
- c = getc(fpars);
- if (c == 'i')
- {
- c = getc(fpars);
- if (c == 'n')
- {
- c = getc(fpars);
- if (c == 'e')
- write_line = 0;
- else
- fprintf(ftable, "#lin");
- }
- else
- fprintf(ftable, "#li");
- }
- else
- fprintf(ftable, "#l");
- }
- else
- fprintf(ftable, "#");
- }
-
- /* now write out the line... */
- for (; c != '\n' && c != EOF; c = getc(fpars))
- if (write_line) {
- if (c == '$')
- {
- /* `$' in the parser file indicates where to put the actions.
- Copy them in at this point. */
- rewind(faction);
- for(c=getc(faction);c!=EOF;c=getc(faction))
- putc(c,ftable);
- }
- else
- putc(c, ftable);
- }
- if (c == EOF)
- break;
- putc(c, ftable);
- }
+ /* 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 ("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. */
+ 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 ());
+ }
}
-void
-output_program (void)
-{
- register int c;
-
- if (!nolinesflag)
- fprintf(ftable, "#line %d \"%s\"\n", lineno, infile);
-
- c = getc(finput);
- while (c != EOF)
- {
- putc(c, ftable);
- c = getc(finput);
- }
-}
+/*----------------------------------------------------------.
+| Output the parsing tables and the parser code to ftable. |
+`----------------------------------------------------------*/
void
-free_itemsets (void)
+output (void)
{
- register core *cp,*cptmp;
+ obstack_init (&format_obstack);
- FREE(state_table);
+ prepare_symbols ();
+ prepare_rules ();
+ prepare_states ();
+ prepare_actions ();
- for (cp = first_state; cp; cp = cptmp) {
- cptmp=cp->next;
- FREE(cp);
- }
-}
+ prepare ();
+ /* Process the selected skeleton file. */
+ output_skeleton ();
-void
-free_shifts (void)
-{
- register shifts *sp,*sptmp;/* JF derefrenced freed ptr */
-
- FREE(shift_table);
-
- for (sp = first_shift; sp; sp = sptmp) {
- sptmp=sp->next;
- FREE(sp);
- }
+ obstack_free (&format_obstack, NULL);
}
-
-void
-free_reductions (void)
+char const *
+compute_pkgdatadir (void)
{
- register reductions *rp,*rptmp;/* JF fixed freed ptr */
-
- FREE(reduction_table);
-
- for (rp = first_reduction; rp; rp = rptmp) {
- rptmp=rp->next;
- FREE(rp);
- }
+ char const *pkgdatadir = getenv ("BISON_PKGDATADIR");
+ return pkgdatadir ? pkgdatadir : PKGDATADIR;
}
projects / bison.git / blobdiff