/* Output the generated parsing program for bison,
- Copyright (C) 1984, 1986, 1989, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
+ Free Software Foundation, Inc.
-This file is part of Bison, the GNU Compiler Compiler.
+ 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.
+ 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.
-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.
+ 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.
-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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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. */
-/* functions to output parsing data to various files. Entries are:
+/* The parser tables consist of these tables. Marked ones needed only
+ for the semantic parser. Double marked are output only if switches
+ are set.
- output_headers ()
+ YYTRANSLATE = vector mapping yylex's token numbers into bison's
+ token numbers.
-Output constant strings to the beginning of certain files.
+ ++ YYTNAME = vector of string-names indexed by bison token number.
- output_trailers()
+ ++ YYTOKNUM = vector of yylex token numbers corresponding to
+ entries in YYTNAME.
-Output constant strings to the ends of certain files.
+ YYRLINE = vector of line-numbers of all rules. For yydebug
+ printouts.
- output ()
+ YYRHS = vector of items of all rules. This is exactly what RITEMS
+ contains. For yydebug and for semantic parser.
-Output the parsing tables and the parser code to ftable.
+ YYPRHS[R] = index in YYRHS of first item for rule R.
-The parser tables consist of these tables.
-Starred ones needed only for the semantic parser.
-Double starred are output only if switches are set.
+ YYR1[R] = symbol number of symbol that rule R derives.
-yytranslate = vector mapping yylex's token numbers into bison's token numbers.
+ YYR2[R] = number of symbols composing right hand side of rule R.
-** yytname = vector of string-names indexed by bison token number
+ + YYSTOS[S] = the symbol number of the symbol that leads to state
+ S.
-** yytoknum = vector of yylex token numbers corresponding to entries in yytname
+ 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.
-yyrline = vector of line-numbers of all rules. For yydebug printouts.
+ 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.
-yyrhs = vector of items of all rules.
- This is exactly what ritems contains. For yydebug and for semantic
- parser.
+ 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.
-yyprhs[r] = index in yyrhs of first item for rule r.
+ If the value in YYTABLE is positive, we shift the token and go to
+ that state.
-yyr1[r] = symbol number of symbol that rule r derives.
+ If the value is negative, it is minus a rule number to reduce by.
-yyr2[r] = number of symbols composing right hand side of rule r.
+ If the value is zero, the default action from YYDEFACT[S] is used.
-* yystos[s] = the symbol number of the symbol that leads to state s.
+ 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.
-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.
+ YYTABLE = a vector filled with portions for different uses, found
+ via YYPACT and YYPGOTO.
-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.
+ YYCHECK = a vector indexed in parallel with YYTABLE. It indicates,
+ in a roundabout way, the bounds of the portion you are trying to
+ examine.
-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.
+ 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.
- If the value in yytable is positive,
- we shift the token and go to that state.
+ YYFINAL = the state number of the termination state. YYFLAG = most
+ negative short int. Used to flag ?? */
- 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 <stdio.h>
#include "system.h"
-#include "machine.h"
-#include "new.h"
+#include "bitsetv.h"
+#include "quotearg.h"
+#include "error.h"
+#include "getargs.h"
#include "files.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;
-
-void output_token_translations();
-void output_gram();
-void output_stos();
-void output_rule_data();
-void output_defines();
-void output_actions();
-void token_actions();
-void save_row();
-void goto_actions();
-void save_column();
-void sort_actions();
-void pack_table();
-void output_base();
-void output_table();
-void output_check();
-void output_parser();
-void output_program();
-void free_itemset();
-void free_shifts();
-void free_reductions();
-void free_itemsets();
-int action_row();
-int default_goto();
-int matching_state();
-int pack_vector();
-
-extern void berror();
-extern void fatals();
-extern char *int_to_string();
-extern void reader_output_yylsp();
+#include "LR0.h"
+#include "complain.h"
+#include "output.h"
+#include "lalr.h"
+#include "reader.h"
+#include "symtab.h"
+#include "conflicts.h"
+#include "muscle_tab.h"
+
+/* From lib/readpipe.h. */
+FILE *readpipe PARAMS ((const char *, ...));
+
+/* From src/scan-skel.l. */
+int skel_lex PARAMS ((void));
+extern FILE *skel_in;
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 short **froms = NULL;
+static short **tos = NULL;
+static unsigned int **conflict_tos = NULL;
+static short *tally = NULL;
+static short *width = NULL;
+static short *actrow = NULL;
+static short *conflrow = NULL;
+static short *state_count = NULL;
+static short *order = NULL;
+static short *base = NULL;
+static short *pos = NULL;
+
+static unsigned int *conflict_table = NULL;
+static unsigned int *conflict_list = NULL;
+static int conflict_list_cnt;
+static int conflict_list_free;
+
+/* TABLE_SIZE is the allocated size of both TABLE and CHECK.
+ We start with the original hard-coded value: SHRT_MAX
+ (yes, not USHRT_MAX). */
+static size_t table_size = SHRT_MAX;
+static short *table = NULL;
+static short *check = NULL;
static int lowzero;
static int high;
+static struct obstack format_obstack;
+int error_verbose = 0;
-#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"
+/*----------------------------------------------------------------.
+| If TABLE (and CHECK) appear to be small to be addressed at |
+| DESIRED, grow them. Note that TABLE[DESIRED] is to be used, so |
+| the desired size is at least DESIRED + 1. |
+`----------------------------------------------------------------*/
-
-void
-output_headers()
+static void
+table_grow (size_t desired)
{
- if (semantic_parser)
- fprintf(fguard, GUARDSTR, attrsfile);
+ size_t old_size = table_size;
- if (noparserflag)
- return;
+ while (table_size <= desired)
+ table_size *= 2;
- 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");
-*/
+ if (trace_flag)
+ fprintf (stderr, "growing table and check from: %d to %d\n",
+ old_size, table_size);
- /* 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);
- }
-}
+ table = XREALLOC (table, short, table_size);
+ check = XREALLOC (check, short, table_size);
+ if (glr_parser)
+ conflict_table = XREALLOC (conflict_table, unsigned int, table_size);
-
-void
-output_trailers()
-{
- 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()
-{
- int c;
-
- /* output_token_defines(ftable); / * JF put out token defines FIRST */
- if (!semantic_parser) /* JF Put out other stuff */
+ for (/* Nothing. */; old_size < table_size; ++old_size)
{
- rewind(fattrs);
- while ((c=getc(fattrs))!=EOF)
- putc(c,ftable);
+ table[old_size] = 0;
+ check[old_size] = -1;
}
- 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();
}
-void
-output_token_translations()
-{
- 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");
- }
-}
-
-
-void
-output_gram()
-{
- register int i;
- register int j;
- register short *sp;
-
- /* 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");
-
- if (! semantic_parser && ! noparserflag)
- fprintf(ftable, "\n#endif\n");
+/*-------------------------------------------------------------------.
+| 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 (const char *name, \
+ Type *table_data, \
+ Type first, \
+ int begin, \
+ int end) \
+{ \
+ 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] > max) \
+ max = table_data[i]; \
+ } \
+ obstack_1grow (&format_obstack, 0); \
+ muscle_insert (name, obstack_finish (&format_obstack)); \
+ \
+ /* Build `NAME_max' in the obstack. */ \
+ obstack_fgrow1 (&format_obstack, "%s_max", name); \
+ obstack_1grow (&format_obstack, 0); \
+ MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), \
+ (long int) max); \
}
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short)
+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)
-void
-output_stos()
-{
- register int i;
- register int j;
- fprintf(ftable, "\nstatic const short yystos[] = { 0");
+/*-----------------------------------------------------------------.
+| Prepare the muscles related to the tokens: translate, tname, and |
+| toknum. |
+`-----------------------------------------------------------------*/
- j = 10;
- for (i = 1; i < nstates; i++)
- {
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", accessing_symbol[i]);
- }
-
- fprintf(ftable, "\n};\n");
-}
-
-
-void
-output_rule_data()
+static void
+prepare_tokens (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\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 */
-
- if (! toknumflag && ! noparserflag)
- fprintf(ftable, "#endif\n\n");
+ muscle_insert_symbol_number_table ("translate",
+ token_translations,
+ 0, 1, max_user_token_number + 1);
+
+ {
+ int i;
+ int j = 0;
+ 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 coma
+ and the space. */
+ int strsize = strlen (cp) + 2;
+
+ if (j + strsize > 75)
+ {
+ obstack_sgrow (&format_obstack, "\n ");
+ j = 2;
+ }
- 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]);
+ obstack_sgrow (&format_obstack, cp);
+ obstack_sgrow (&format_obstack, ", ");
+ j += strsize;
}
- fprintf(ftable, "\n};\n\n");
- }
+ /* Add a NULL entry to list of tokens (well, 0, as NULL might not be
+ defined). */
+ obstack_sgrow (&format_obstack, "0");
- 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++;
- }
+ /* Finish table and store. */
+ obstack_1grow (&format_obstack, 0);
+ muscle_insert ("tname", obstack_finish (&format_obstack));
+ }
- fprintf(ftable, "%6d", rlhs[i]);
- }
+ /* Output YYTOKNUM. */
+ {
+ int i;
+ short *values = XCALLOC (short, ntokens + 1);
+ for (i = 0; i < ntokens + 1; ++i)
+ values[i] = symbols[i]->user_token_number;
+ muscle_insert_short_table ("toknum", values,
+ 0, 1, ntokens + 1);
+ free (values);
+ }
+}
- FREE(rlhs + 1);
- fprintf(ftable, "\n};\n\nstatic const short yyr2[] = { 0");
+/*-------------------------------------------------------------.
+| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
+| rline, dprec, merger |
+`-------------------------------------------------------------*/
- j = 10;
- for (i = 1; i < nrules; i++)
+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 + 1);
+ unsigned int *rline = XMALLOC (unsigned int, nrules + 1);
+ symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules + 1);
+ unsigned int *r2 = XMALLOC (unsigned int, nrules + 1);
+ short *dprec = XMALLOC (short, nrules + 1);
+ short *merger = XMALLOC (short, nrules + 1);
+
+ for (r = 1; r < nrules + 1; ++r)
{
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- fprintf(ftable, "%6d", rrhs[i + 1] - rrhs[i] - 1);
+ 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;
+ /* Line where rule was defined. */
+ rline[r] = rules[r].location.first_line;
+ /* Dynamic precedence (GLR) */
+ dprec[r] = rules[r].dprec;
+ /* Merger-function index (GLR) */
+ merger[r] = rules[r].merger;
}
-
- putc(',', ftable);
- if (j >= 10)
- putc('\n', ftable);
-
- fprintf(ftable, "%6d\n};\n", nitems - rrhs[nrules] - 1);
- FREE(rrhs + 1);
+ assert (i == nritems);
+
+ muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems);
+ muscle_insert_unsigned_int_table ("prhs", prhs, 0, 1, nrules + 1);
+ muscle_insert_unsigned_int_table ("rline", rline, 0, 1, nrules + 1);
+ muscle_insert_symbol_number_table ("r1", r1, 0, 1, nrules + 1);
+ muscle_insert_unsigned_int_table ("r2", r2, 0, 1, nrules + 1);
+ muscle_insert_short_table ("dprec", dprec, 0, 1, nrules + 1);
+ muscle_insert_short_table ("merger", merger, 0, 1, nrules + 1);
+
+ free (rhs);
+ free (prhs);
+ free (rline);
+ free (r1);
+ free (r2);
+ free (dprec);
+ free (merger);
}
+/*--------------------------------------------.
+| Prepare the muscles related to the states. |
+`--------------------------------------------*/
-void
-output_defines()
+static void
+prepare_states (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);
+ state_number_t i;
+ symbol_number_t *values =
+ (symbol_number_t *) alloca (sizeof (symbol_number_t) * nstates);
+ for (i = 0; i < nstates; ++i)
+ values[i] = states[i]->accessing_symbol;
+ muscle_insert_symbol_number_table ("stos", values,
+ 0, 1, nstates);
}
+/*-------------------------------------------------------------------.
+| For GLR parsers, for each conflicted token in STATE, as indicated |
+| by non-zero entries in conflrow, create a list of possible |
+| reductions that are alternatives to the shift or reduction |
+| currently recorded for that token in STATE. Store the alternative |
+| reductions followed by a 0 in conflict_list, updating |
+| conflict_list_cnt, and storing an index to the start of the list |
+| back into conflrow. |
+`-------------------------------------------------------------------*/
-/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable and yycheck. */
-
-void
-output_actions()
+static void
+conflict_row (state_t *state)
{
- 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();
-}
+ int i, j;
+ if (! glr_parser)
+ return;
+ for (j = 0; j < ntokens; j += 1)
+ if (conflrow[j])
+ {
+ conflrow[j] = conflict_list_cnt;
-/* 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()
-{
- 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);
- }
+ /* find all reductions for token j, and record all that do
+ * not match actrow[j] */
+ for (i = 0; i < state->nlookaheads; i += 1)
+ if (bitset_test (state->lookaheads[i], j)
+ && actrow[j] != -state->lookaheads_rule[i]->number)
+ {
+ assert (conflict_list_free > 0);
+ conflict_list[conflict_list_cnt]
+ = state->lookaheads_rule[i]->number;
+ conflict_list_cnt += 1;
+ conflict_list_free -= 1;
+ }
- fprintf(ftable, "\n};\n");
- FREE(actrow);
+ /* Leave a 0 at the end */
+ assert (conflict_list_free > 0);
+ conflict_list_cnt += 1;
+ conflict_list_free -= 1;
+ }
}
-
-/* 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. */
-
-int
-action_row(state)
-int state;
+/*------------------------------------------------------------------.
+| 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 |
+| SHRT_MIN, 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. |
+| |
+| For GLR parsers, also sets conflrow[SYM] to an index into |
+| conflict_list iff there is an unresolved conflict (s/r or r/r) |
+| with symbol SYM. The default reduction is not used for a symbol |
+| that has any such conflicts. |
+`------------------------------------------------------------------*/
+
+static int
+action_row (state_t *state)
{
- register int i;
- register int j;
- register int k;
- register int m;
- register int n;
- 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 */
+ int i;
+ rule_number_t default_rule = 0;
+ reductions_t *redp = state->reductions;
+ transitions_t *transitions = state->transitions;
+ errs_t *errp = state->errs;
+ /* set nonzero to inhibit having any default reduction */
+ int nodefault = 0;
+ int conflicted = 0;
for (i = 0; i < ntokens; i++)
- actrow[i] = 0;
-
- default_rule = 0;
- nreds = 0;
- redp = reduction_table[state];
+ actrow[i] = conflrow[i] = 0;
- if (redp)
+ if (redp->num >= 1)
{
- nreds = redp->nreds;
-
- if (nreds >= 1)
+ int j;
+ bitset_iterator biter;
+ /* loop over all the rules available here which require
+ lookahead */
+ for (i = state->nlookaheads - 1; i >= 0; --i)
+ /* and find each token which the rule finds acceptable
+ to come next */
+ BITSET_FOR_EACH (biter, state->lookaheads[i], j, 0)
{
- /* 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++;
- }
- }
- }
+ /* and record this rule as the rule to use if that
+ token follows. */
+ if (actrow[j] != 0)
+ conflicted = conflrow[j] = 1;
+ actrow[j] = -state->lookaheads_rule[i]->number;
}
}
- 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;
- }
- }
+ /* 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. */
+ for (i = 0; i < transitions->num && TRANSITION_IS_SHIFT (transitions, i); i++)
+ if (!TRANSITION_IS_DISABLED (transitions, i))
+ {
+ symbol_number_t symbol = TRANSITION_SYMBOL (transitions, i);
+ state_number_t shift_state = transitions->states[i];
- errp = err_table[state];
+ if (actrow[symbol] != 0)
+ conflicted = conflrow[symbol] = 1;
+ actrow[symbol] = state_number_as_int (shift_state);
- /* See which tokens are an explicit error in this state
- (due to %nonassoc). For them, record MINSHORT as the action. */
+ /* Do not use any default reduction if there is a shift for
+ error */
+ if (symbol == errtoken->number)
+ nodefault = 1;
+ }
- if (errp)
+ /* See which tokens are an explicit error in this state (due to
+ %nonassoc). For them, record SHRT_MIN as the action. */
+ for (i = 0; i < errp->num; i++)
{
- k = errp->nerrs;
-
- for (i = 0; i < k; i++)
- {
- symbol = errp->errs[i];
- actrow[symbol] = MINSHORT;
- }
+ symbol_number_t symbol = errp->symbols[i];
+ actrow[symbol] = SHRT_MIN;
}
- /* now find the most common reduction and make it the default action for this state. */
+ /* Now find the most common reduction and make it the default action
+ for this state. */
- if (nreds >= 1 && ! nodefault)
+ if (redp->num >= 1 && !nodefault)
{
- if (consistent[state])
+ if (state->consistent)
default_rule = redp->rules[0];
else
{
- max = 0;
- for (i = m; i < n; i++)
+ int max = 0;
+ for (i = 0; i < state->nlookaheads; i++)
{
- count = 0;
- rule = - LAruleno[i];
-
+ int count = 0;
+ rule_number_t rule = state->lookaheads_rule[i]->number;
+ symbol_number_t j;
+
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == rule)
- count++;
- }
-
+ 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" */
-
+
+ /* GLR parsers need space for conflict lists, so we can't
+ default conflicted entries. For non-conflicted entries
+ or as long as we are not building a GLR parser,
+ actions that match the default are replaced with zero,
+ which means "use the default". */
+
if (max > 0)
{
+ int j;
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == default_rule)
- actrow[j] = 0;
- }
-
- default_rule = - default_rule;
+ if (actrow[j] == -default_rule
+ && ! (glr_parser && conflrow[j]))
+ actrow[j] = 0;
}
}
}
So replace any action which says "error" with "use default". */
if (default_rule == 0)
- for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == MINSHORT)
- actrow[j] = 0;
- }
+ for (i = 0; i < ntokens; i++)
+ if (actrow[i] == SHRT_MIN)
+ actrow[i] = 0;
+
+ if (conflicted)
+ conflict_row (state);
- return (default_rule);
+ return default_rule;
}
-void
-save_row(state)
-int state;
+static void
+save_row (state_number_t state)
{
- register int i;
- register int count;
- register short *sp;
- register short *sp1;
- register short *sp2;
+ symbol_number_t i;
+ int count;
+ short *sp = NULL;
+ short *sp1 = NULL;
+ short *sp2 = NULL;
+ unsigned int *sp3 = NULL;
count = 0;
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- count++;
- }
+ if (actrow[i] != 0)
+ count++;
if (count == 0)
return;
- froms[state] = sp1 = sp = NEW2(count, short);
- tos[state] = sp2 = NEW2(count, short);
+ froms[state] = sp1 = sp = XCALLOC (short, count);
+ tos[state] = sp2 = XCALLOC (short, count);
+ if (glr_parser)
+ conflict_tos[state] = sp3 = XCALLOC (unsigned int, count);
+ else
+ conflict_tos[state] = NULL;
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- {
- *sp1++ = i;
- *sp2++ = actrow[i];
- }
- }
+ if (actrow[i] != 0)
+ {
+ *sp1++ = i;
+ *sp2++ = actrow[i];
+ if (glr_parser)
+ *sp3++ = conflrow[i];
+ }
tally[state] = count;
width[state] = sp1[-1] - sp[0] + 1;
}
+/*------------------------------------------------------------------.
+| 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. |
+`------------------------------------------------------------------*/
-/* 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()
+static void
+token_actions (void)
{
- register int i;
- register int j;
- register int k;
+ state_number_t i;
+ int nconflict = conflicts_total_count ();
- state_count = NEW2(nstates, short);
+ short *yydefact = XCALLOC (short, nstates);
- k = default_goto(ntokens);
- fprintf(ftable, "\nstatic const short yydefgoto[] = {%6d", k);
- save_column(ntokens, k);
+ actrow = XCALLOC (short, ntokens);
- j = 10;
- for (i = ntokens + 1; i < nsyms; i++)
+ conflrow = XCALLOC (short, ntokens);
+ if (glr_parser)
{
- putc(',', ftable);
-
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ conflict_list = XCALLOC (unsigned int, 1 + 2 * nconflict);
+ conflict_list_free = 2 * nconflict;
+ conflict_list_cnt = 1;
+ }
+ else
+ conflict_list_free = conflict_list_cnt = 0;
- k = default_goto(i);
- fprintf(ftable, "%6d", k);
- save_column(i, k);
+ for (i = 0; i < nstates; ++i)
+ {
+ yydefact[i] = action_row (states[i]);
+ save_row (i);
}
- fprintf(ftable, "\n};\n");
- FREE(state_count);
+ muscle_insert_short_table ("defact", yydefact,
+ yydefact[0], 1, nstates);
+ XFREE (actrow);
+ XFREE (conflrow);
+ XFREE (yydefact);
}
+/*-----------------------------.
+| Output the actions to OOUT. |
+`-----------------------------*/
-int
-default_goto(symbol)
-int symbol;
+void
+actions_output (FILE *out)
{
- 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];
+ rule_number_t r;
- if (m == n)
- return (-1);
-
- for (i = 0; i < nstates; i++)
- state_count[i] = 0;
+ fputs ("m4_define([b4_actions], \n[[", out);
+ for (r = 1; r < nrules + 1; ++r)
+ if (rules[r].action)
+ {
+ fprintf (out, " case %d:\n", r);
+
+ if (!no_lines_flag)
+ fprintf (out, muscle_find ("linef"),
+ rules[r].action_location.first_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ fprintf (out, " %s\n break;\n\n",
+ rules[r].action);
+ }
+ fputs ("]])\n\n", out);
+}
- for (i = m; i < n; i++)
- state_count[to_state[i]]++;
+/*--------------------------------------.
+| Output the merge functions to OUT. |
+`--------------------------------------*/
- max = 0;
- default_state = -1;
+static void
+merger_output (FILE *out)
+{
+ int n;
+ merger_list* p;
- for (i = 0; i < nstates; i++)
+ fputs ("m4_define([b4_mergers], \n[[", out);
+ for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)
{
- if (state_count[i] > max)
- {
- max = state_count[i];
- default_state = i;
- }
+ if (p->type[0] == '\0')
+ fprintf (out, " case %d: yyval = %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);
}
-
- return (default_state);
+ fputs ("]])\n\n", out);
}
+/*---------------------------------------.
+| Output the tokens definition to OOUT. |
+`---------------------------------------*/
void
-save_column(symbol, default_state)
-int symbol;
-int default_state;
+token_definitions_output (FILE *out)
{
- 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];
+ int i;
+ int first = 1;
- count = 0;
- for (i = m; i < n; i++)
+ fputs ("m4_define([b4_tokens], \n[", out);
+ for (i = 0; i < ntokens; ++i)
{
- if (to_state[i] != default_state)
- count++;
+ 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);
+}
- if (count == 0)
- return;
-
- symno = symbol - ntokens + nstates;
- froms[symno] = sp1 = sp = NEW2(count, short);
- tos[symno] = sp2 = NEW2(count, short);
+/*----------------------------------------.
+| Output the symbol destructors to OOUT. |
+`----------------------------------------*/
- for (i = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- {
- *sp1++ = from_state[i];
- *sp2++ = to_state[i];
- }
- }
+static void
+symbol_destructors_output (FILE *out)
+{
+ int i;
+ int first = 1;
- tally[symno] = count;
- width[symno] = sp1[-1] - sp[0] + 1;
+ 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[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+ first ? "" : ",\n",
+ infile, symbol->destructor_location.first_line,
+ symbol->tag,
+ symbol->number,
+ symbol->destructor,
+ symbol->type_name);
+
+ first = 0;
+ }
+ fputs ("])\n\n", out);
}
+/*-------------------------------------.
+| Output the symbol printers to OOUT. |
+`-------------------------------------*/
-/* the next few functions decide how to pack
- the actions and gotos information into yytable. */
+static void
+symbol_printers_output (FILE *out)
+{
+ int i;
+ int first = 1;
-void
-sort_actions()
+ 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,
+ destructor, typename. */
+ fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+ first ? "" : ",\n",
+ infile, symbol->printer_location.first_line,
+ symbol->tag,
+ symbol->number,
+ symbol->printer,
+ symbol->type_name);
+
+ first = 0;
+ }
+ fputs ("])\n\n", out);
+}
+
+
+static void
+save_column (symbol_number_t symbol, state_number_t default_state)
{
- register int i;
- register int j;
- register int k;
- register int t;
- register int w;
+ int i;
+ short *sp;
+ short *sp1;
+ short *sp2;
+ int count;
+ int symno = symbol - ntokens + state_number_as_int (nstates);
- order = NEW2(nvectors, short);
- nentries = 0;
+ int begin = goto_map[symbol];
+ int end = goto_map[symbol + 1];
- for (i = 0; i < nvectors; i++)
- {
- if (tally[i] > 0)
- {
- t = tally[i];
- w = width[i];
- j = nentries - 1;
+ count = 0;
+ for (i = begin; i < end; i++)
+ if (to_state[i] != default_state)
+ count++;
- while (j >= 0 && (width[order[j]] < w))
- j--;
+ if (count == 0)
+ return;
- while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
- j--;
+ froms[symno] = sp1 = sp = XCALLOC (short, count);
+ tos[symno] = sp2 = XCALLOC (short, count);
- for (k = nentries - 1; k > j; k--)
- order[k + 1] = order[k];
+ for (i = begin; i < end; i++)
+ if (to_state[i] != default_state)
+ {
+ *sp1++ = from_state[i];
+ *sp2++ = to_state[i];
+ }
- order[j + 1] = i;
- nentries++;
- }
- }
+ tally[symno] = count;
+ width[symno] = sp1[-1] - sp[0] + 1;
}
-void
-pack_table()
+static state_number_t
+default_goto (symbol_number_t symbol)
{
- register int i;
- register int place;
- register int state;
+ state_number_t s;
+ int i;
+ int m = goto_map[symbol];
+ int n = goto_map[symbol + 1];
+ state_number_t default_state = (state_number_t) -1;
+ int max = 0;
- base = NEW2(nvectors, short);
- pos = NEW2(nentries, short);
- table = NEW2(MAXTABLE, short);
- check = NEW2(MAXTABLE, short);
+ if (m == n)
+ return (state_number_t) -1;
- lowzero = 0;
- high = 0;
+ for (s = 0; s < nstates; s++)
+ state_count[s] = 0;
- for (i = 0; i < nvectors; i++)
- base[i] = MINSHORT;
+ for (i = m; i < n; i++)
+ state_count[to_state[i]]++;
- for (i = 0; i < MAXTABLE; i++)
- check[i] = -1;
+ for (s = 0; s < nstates; s++)
+ if (state_count[s] > max)
+ {
+ max = state_count[s];
+ default_state = s;
+ }
- for (i = 0; i < nentries; i++)
- {
- state = matching_state(i);
+ return default_state;
+}
- if (state < 0)
- place = pack_vector(i);
- else
- place = base[state];
- pos[i] = place;
- base[order[i]] = place;
- }
+/*-------------------------------------------------------------------.
+| 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. |
+`-------------------------------------------------------------------*/
- for (i = 0; i < nvectors; i++)
+static void
+goto_actions (void)
+{
+ symbol_number_t i;
+ state_number_t *yydefgoto = XMALLOC (state_number_t, nsyms - ntokens);
+
+ state_count = XCALLOC (short, nstates);
+ for (i = ntokens; i < nsyms; ++i)
{
- if (froms[i])
- FREE(froms[i]);
- if (tos[i])
- FREE(tos[i]);
+ state_number_t default_state = default_goto (i);
+ save_column (i, default_state);
+ yydefgoto[i - ntokens] = default_state;
}
- FREE(froms);
- FREE(tos);
- FREE(pos);
+ muscle_insert_state_number_table ("defgoto", yydefgoto,
+ yydefgoto[0], 1, nsyms - ntokens);
+ XFREE (state_count);
+ XFREE (yydefgoto);
}
+/* The next few functions decide how to pack the actions and gotos
+ information into yytable. */
-int
-matching_state(vector)
-int vector;
+static void
+sort_actions (void)
{
- 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);
+ int i;
+
+ order = XCALLOC (short, nvectors);
+ nentries = 0;
+
+ for (i = 0; i < nvectors; i++)
+ if (tally[i] > 0)
+ {
+ int k;
+ int t = tally[i];
+ int w = width[i];
+ int 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++;
+ }
+}
+
+
+static int
+matching_state (int vector)
+{
+ int i = order[vector];
+ int t;
+ int w;
+ int prev;
+
+ if (i >= (int) nstates)
+ return -1;
t = tally[i];
w = width[i];
for (prev = vector - 1; prev >= 0; prev--)
{
- j = order[prev];
+ int j = order[prev];
+ int k;
+ int match = 1;
+
if (width[j] != w || tally[j] != t)
- return (-1);
+ 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 (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k])
+ match = 0;
if (match)
- return (j);
+ return j;
}
- return (-1);
+ return -1;
}
-
-int
-pack_vector(vector)
-int vector;
+static int
+pack_vector (int vector)
{
- register int i;
- register int j;
- register int k;
- register int t;
- register int loc;
- register int ok;
- register short *from;
- register short *to;
-
- i = order[vector];
- t = tally[i];
-
- if (t == 0)
- berror("pack_vector");
+ int i = order[vector];
+ int j;
+ int t = tally[i];
+ int loc = 0;
+ short *from = froms[i];
+ short *to = tos[i];
+ unsigned int *conflict_to = conflict_tos[i];
- from = froms[i];
- to = tos[i];
+ assert (t);
- for (j = lowzero - from[0]; j < MAXTABLE; j++)
+ for (j = lowzero - from[0]; j < (int) table_size; j++)
{
- ok = 1;
+ int k;
+ int 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));
+ loc = j + state_number_as_int (from[k]);
+ if (loc > (int) table_size)
+ table_grow (loc);
if (table[loc] != 0)
ok = 0;
}
for (k = 0; ok && k < vector; k++)
- {
- if (pos[k] == j)
- ok = 0;
- }
+ 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];
+ loc = j + state_number_as_int (from[k]);
+ table[loc] = state_number_as_int (to[k]);
+ if (glr_parser && conflict_to != NULL)
+ conflict_table[loc] = conflict_to[k];
+ check[loc] = state_number_as_int (from[k]);
}
while (table[lowzero] != 0)
if (loc > high)
high = loc;
- return (j);
+ return j;
}
}
-
- berror("pack_vector");
- return 0; /* JF keep lint happy */
+#define pack_vector_succeeded 0
+ assert (pack_vector_succeeded);
+ return 0;
}
+static void
+pack_table (void)
+{
+ int i;
+ int place;
+ int state;
-/* the following functions output yytable, yycheck
- and the vectors whose elements index the portion starts */
+ base = XCALLOC (short, nvectors);
+ pos = XCALLOC (short, nentries);
+ table = XCALLOC (short, table_size);
+ if (glr_parser)
+ conflict_table = XCALLOC (unsigned int, table_size);
+ check = XCALLOC (short, table_size);
-void
-output_base()
-{
- register int i;
- register int j;
+ lowzero = 0;
+ high = 0;
+
+ for (i = 0; i < nvectors; i++)
+ base[i] = SHRT_MIN;
- fprintf(ftable, "\nstatic const short yypact[] = {%6d", base[0]);
+ for (i = 0; i < (int) table_size; i++)
+ check[i] = -1;
- j = 10;
- for (i = 1; i < nstates; i++)
+ for (i = 0; i < nentries; i++)
{
- putc(',', ftable);
+ state = matching_state (i);
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
+ if (state < 0)
+ place = pack_vector (i);
else
- {
- j++;
- }
+ place = base[state];
- fprintf(ftable, "%6d", base[i]);
+ pos[i] = place;
+ base[order[i]] = place;
}
- fprintf(ftable, "\n};\n\nstatic const short yypgoto[] = {%6d", base[nstates]);
-
- j = 10;
- for (i = nstates + 1; i < nvectors; i++)
+ for (i = 0; i < nvectors; i++)
{
- putc(',', ftable);
+ XFREE (froms[i]);
+ XFREE (tos[i]);
+ XFREE (conflict_tos[i]);
+ }
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ XFREE (froms);
+ XFREE (tos);
+ XFREE (conflict_tos);
+ XFREE (pos);
+}
- fprintf(ftable, "%6d", base[i]);
- }
+/* the following functions output yytable, yycheck, yyconflp, yyconfl,
+ and the vectors whose elements index the portion starts */
- fprintf(ftable, "\n};\n");
- FREE(base);
+static void
+output_base (void)
+{
+ /* Output pact. */
+ muscle_insert_short_table ("pact", base,
+ base[0], 1, nstates);
+
+ /* Output pgoto. */
+ muscle_insert_short_table ("pgoto", base,
+ base[nstates], nstates + 1, nvectors);
+ XFREE (base);
}
-void
-output_table()
+static void
+output_table (void)
{
- register int i;
- register int j;
+ muscle_insert_short_table ("table", table,
+ table[0], 1, high + 1);
+ XFREE (table);
+}
- 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);
+static void
+output_conflicts (void)
+{
+ /* 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
+ avoid accidents by not writing them out in that case. */
+ if (! glr_parser)
+ return;
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table,
+ conflict_table[0], 1, high+1);
+ muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
+ conflict_list[0], 1, conflict_list_cnt);
+
+ XFREE (conflict_table);
+ XFREE (conflict_list);
+}
- fprintf(ftable, "%6d", table[i]);
- }
- fprintf(ftable, "\n};\n");
- FREE(table);
+static void
+output_check (void)
+{
+ muscle_insert_short_table ("check", check,
+ check[0], 1, high + 1);
+ XFREE (check);
}
+/*-----------------------------------------------------------------.
+| Compute and output yydefact, yydefgoto, yypact, yypgoto, yytable |
+| and yycheck. |
+`-----------------------------------------------------------------*/
-void
-output_check()
+static void
+output_actions (void)
{
- register int i;
- register int j;
+ /* That's a poor way to make sure the sizes are properly corelated,
+ in particular the signedness is not taking into account, but it's
+ not useless. */
+ assert (sizeof (nvectors) >= sizeof (nstates));
+ assert (sizeof (nvectors) >= sizeof (nvars));
- fprintf(ftable, "\nstatic const short yycheck[] = {%6d", check[0]);
+ nvectors = state_number_as_int (nstates) + nvars;
- j = 10;
- for (i = 1; i <= high; i++)
- {
- putc(',', ftable);
+ froms = XCALLOC (short *, nvectors);
+ tos = XCALLOC (short *, nvectors);
+ conflict_tos = XCALLOC (unsigned int *, nvectors);
+ tally = XCALLOC (short, nvectors);
+ width = XCALLOC (short, nvectors);
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ token_actions ();
+ bitsetv_free (LA);
+ free (LArule);
- fprintf(ftable, "%6d", check[i]);
- }
+ goto_actions ();
+ XFREE (goto_map + ntokens);
+ XFREE (from_state);
+ XFREE (to_state);
- fprintf(ftable, "\n};\n");
- FREE(check);
-}
+ sort_actions ();
+ pack_table ();
+ output_base ();
+ output_table ();
+ output_conflicts ();
+ output_check ();
+}
-/* copy the parser code into the ftable file at the end. */
+\f
+/*----------------------.
+| Run our backend, M4. |
+`----------------------*/
-void
-output_parser()
+static void
+m4_invoke (const char *definitions)
{
- 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;
+ /* Invoke m4 on the definition of the muscles, and the skeleton. */
+ const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
+ const char *m4 = getenv ("M4");
+ int pkg_data_len;
+ char *full_skeleton;
+
+ if (!m4)
+ m4 = M4;
+ if (!bison_pkgdatadir)
+ bison_pkgdatadir = PKGDATADIR;
+ pkg_data_len = strlen (bison_pkgdatadir);
+ full_skeleton = XMALLOC (char, pkg_data_len + strlen (skeleton) + 2);
+ if (bison_pkgdatadir[pkg_data_len-1] == '/')
+ sprintf (full_skeleton, "%s%s", bison_pkgdatadir, skeleton);
+ else
+ sprintf (full_skeleton, "%s/%s", bison_pkgdatadir, skeleton);
+ if (trace_flag)
+ fprintf (stderr,
+ "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
+ m4, bison_pkgdatadir, definitions, full_skeleton);
+ skel_in = readpipe (m4,
+ "-I", bison_pkgdatadir,
+ "m4sugar/m4sugar.m4",
+ definitions,
+ full_skeleton,
+ NULL);
+ XFREE (full_skeleton);
+ if (!skel_in)
+ error (EXIT_FAILURE, errno, "cannot run m4");
+ skel_lex ();
+}
- 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, "#");
- }
+/*---------------------------.
+| Call the skeleton parser. |
+`---------------------------*/
- /* 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);
- }
+static void
+output_skeleton (void)
+{
+ /* Store the definition of all the muscles. */
+ const char *tempdir = getenv ("TMPDIR");
+ char *tempfile = NULL;
+ FILE *out = NULL;
+ int fd;
+
+ if (tempdir == NULL)
+ tempdir = DEFAULT_TMPDIR;
+ tempfile = xmalloc (strlen (tempdir) + 11);
+ sprintf (tempfile, "%s/bsnXXXXXX", tempdir);
+ fd = mkstemp (tempfile);
+ if (fd == -1)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ out = fdopen (fd, "w");
+ if (out == NULL)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ /* There are no comments, especially not `#': we do want M4 expansion
+ after `#': think of CPP macros! */
+ fputs ("m4_changecom()\n", out);
+ fputs ("m4_init()\n", out);
+
+ 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);
+
+ m4_invoke (tempfile);
+
+ /* If `debugging', keep this file alive. */
+ if (!trace_flag)
+ unlink (tempfile);
+
+ free (tempfile);
}
-void
-output_program()
+static void
+prepare (void)
{
- register int c;
- extern int lineno;
-
- if (!nolinesflag)
- fprintf(ftable, "#line %d \"%s\"\n", lineno, infile);
-
- c = getc(finput);
- while (c != EOF)
+ MUSCLE_INSERT_INT ("last", high);
+ MUSCLE_INSERT_INT ("flag", SHRT_MIN);
+ MUSCLE_INSERT_INT ("pure", pure_parser);
+ MUSCLE_INSERT_INT ("nsym", nsyms);
+ MUSCLE_INSERT_INT ("debug", debug_flag);
+ MUSCLE_INSERT_INT ("final", final_state->number);
+ MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
+ MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
+ MUSCLE_INSERT_INT ("error_verbose", error_verbose);
+ MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
+
+ /* 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 ("output_infix", output_infix ? output_infix : "");
+ MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
+ MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
+ MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);
+
+ MUSCLE_INSERT_INT ("nnts", nvars);
+ MUSCLE_INSERT_INT ("nrules", nrules);
+ MUSCLE_INSERT_INT ("nstates", nstates);
+ MUSCLE_INSERT_INT ("ntokens", ntokens);
+
+ MUSCLE_INSERT_INT ("locations_flag", locations_flag);
+ MUSCLE_INSERT_INT ("defines_flag", defines_flag);
+
+ /* Copy definitions in directive. */
+ 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)
{
- putc(c, ftable);
- c = getc(finput);
+ if (glr_parser)
+ skeleton = "glr.c";
+ else
+ skeleton = "yacc.c";
}
-}
-
-void
-free_itemsets()
-{
- register core *cp,*cptmp;
-
- FREE(state_table);
-
- for (cp = first_state; cp; cp = cptmp) {
- cptmp=cp->next;
- FREE(cp);
- }
+ /* Parse the skeleton file and output the needed parsers. */
+ muscle_insert ("skeleton", skeleton);
}
+/*----------------------------------------------------------.
+| Output the parsing tables and the parser code to ftable. |
+`----------------------------------------------------------*/
+
void
-free_shifts()
+output (void)
{
- register shifts *sp,*sptmp;/* JF derefrenced freed ptr */
+ obstack_init (&format_obstack);
- FREE(shift_table);
+ prepare_tokens ();
+ prepare_rules ();
+ prepare_states ();
+ output_actions ();
- for (sp = first_shift; sp; sp = sptmp) {
- sptmp=sp->next;
- FREE(sp);
- }
-}
-
-
-void
-free_reductions()
-{
- register reductions *rp,*rptmp;/* JF fixed freed ptr */
+ prepare ();
- FREE(reduction_table);
+ /* Process the selected skeleton file. */
+ output_skeleton ();
- for (rp = first_reduction; rp; rp = rptmp) {
- rptmp=rp->next;
- FREE(rp);
- }
+ obstack_free (&format_obstack, NULL);
+ obstack_free (&pre_prologue_obstack, NULL);
+ obstack_free (&post_prologue_obstack, NULL);
}
projects / bison.git / blobdiff