/* Output the generated parsing program for bison,
- Copyright (C) 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
+ Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
02111-1307, USA. */
-/* functions to output parsing data to various files. Entries are:
+/* The parser tables consist of these tables.
+ Starred ones needed only for the semantic parser.
+ Double starred 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.
-
- 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.
+ 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 "alloc.h"
+#include "obstack.h"
+#include "quotearg.h"
+#include "getargs.h"
+#include "xalloc.h"
#include "files.h"
#include "gram.h"
-#include "state.h"
+#include "LR0.h"
#include "complain.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 void output_headers PARAMS((void));
-extern void output_trailers PARAMS((void));
-extern void output PARAMS((void));
-
-static void output_token_translations PARAMS((void));
-static void output_gram PARAMS((void));
-static void output_stos PARAMS((void));
-static void output_rule_data PARAMS((void));
-static void output_defines PARAMS((void));
-static void output_actions PARAMS((void));
-static void token_actions PARAMS((void));
-static void save_row PARAMS((int));
-static void goto_actions PARAMS((void));
-static void save_column PARAMS((int, int));
-static void sort_actions PARAMS((void));
-static void pack_table PARAMS((void));
-static void output_base PARAMS((void));
-static void output_table PARAMS((void));
-static void output_check PARAMS((void));
-static void output_parser PARAMS((void));
-static void output_program PARAMS((void));
-static void free_shifts PARAMS((void));
-static void free_reductions PARAMS((void));
-static void free_itemsets PARAMS((void));
-static int action_row PARAMS((int));
-static int default_goto PARAMS((int));
-static int matching_state PARAMS((int));
-static int pack_vector PARAMS((int));
+#include "output.h"
+#include "lalr.h"
+#include "reader.h"
+#include "conflicts.h"
+#include "macrotab.h"
extern void berror PARAMS((const char *));
-extern void reader_output_yylsp PARAMS((FILE *));
static int nvectors;
static int nentries;
static int lowzero;
static int high;
+struct obstack macro_obstack;
+struct obstack output_obstack;
+/* FIXME. */
-#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)
+static inline void
+output_table_data (struct obstack* oout,
+ short* table,
+ short first,
+ short begin,
+ short end)
{
- int c;
-
- /* output_token_defines(ftable); / * JF put out token defines FIRST */
- if (!semantic_parser) /* JF Put out other stuff */
+ int i;
+ int j = 1;
+
+ obstack_fgrow1 (oout, "%6d", first);
+ for (i = begin; i < end; ++i)
{
- rewind(fattrs);
- while ((c=getc(fattrs))!=EOF)
- putc(c,ftable);
+ obstack_1grow (oout, ',');
+ if (j >= 10)
+ {
+ obstack_sgrow (oout, "\n ");
+ j = 1;
+ }
+ else
+ ++j;
+ obstack_fgrow1 (oout, "%6d", table[i]);
}
- 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();
+ obstack_1grow (oout, 0);
}
static 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");
- }
+ output_table_data (&output_obstack, token_translations,
+ 0, 1, max_user_token_number + 1);
+ macro_insert ("translate", obstack_finish (&output_obstack));
}
static void
output_gram (void)
{
- 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");
+ output_table_data (&output_obstack, rrhs,
+ 0, 1, nrules + 1);
+ macro_insert ("prhs", obstack_finish (&output_obstack));
+
+ {
+ size_t yyrhs_size = 1;
+ short *yyrhs, *sp;
+ int i;
+
+ for (sp = ritem + 1; *sp; sp++)
+ ++yyrhs_size;
+ yyrhs = XMALLOC (short, yyrhs_size);
+
+ for (sp = ritem + 1, i = 1; *sp; ++sp, ++i)
+ yyrhs[i] = *sp > 0 ? *sp : 0;
+
+ output_table_data (&output_obstack, yyrhs,
+ ritem[0], 1, yyrhs_size);
+ macro_insert ("rhs", obstack_finish (&output_obstack));
+
+ XFREE (yyrhs);
+ }
+
+ /* if (!semantic_parser && !no_parser_flag)
+ obstack_sgrow (&table_obstack, "\n#endif\n"); */
}
static 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++;
- }
-
- fprintf(ftable, "%6d", accessing_symbol[i]);
- }
-
- fprintf(ftable, "\n};\n");
+ output_table_data (&output_obstack, accessing_symbol,
+ 0, 1, nstates);
+ macro_insert ("stos", obstack_finish (&output_obstack));
}
static void
output_rule_data (void)
{
- register int i;
- register int j;
-
- fputs ("\n\
-#if YYDEBUG != 0\n\
-/* YYRLINE[yyn]: source line where rule number YYN was defined. */\n\
-static const short yyrline[] = { 0", ftable);
-
- j = 10;
- for (i = 1; i <= nrules; i++)
+ int i;
+ int j;
+ short *short_tab = NULL;
+
+ output_table_data (&output_obstack, rline,
+ 0, 1, nrules + 1);
+ macro_insert ("rline", obstack_finish (&output_obstack));
+
+ j = 0;
+ for (i = 0; i < nsyms; i++)
+ /* this used to be i<=nsyms, but that output a final "" symbol
+ almost by accident */
{
- 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);
- }
+ /* Width of the next token, including the two quotes, the coma
+ and the space. */
+ int strsize = 4;
+ char *p;
- 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)
+ for (p = tags[i]; p && *p; p++)
+ if (*p == '"' || *p == '\\' || *p == '\n' || *p == '\t'
+ || *p == '\b')
+ strsize += 2;
+ else if (*p < 040 || *p >= 0177)
+ strsize += 4;
+ else
+ strsize++;
+
+ if (j + strsize > 75)
{
- putc('\n', ftable);
- j = 0;
+ obstack_sgrow (&output_obstack, "\n ");
+ j = 2;
}
- putc ('\"', ftable);
- j++;
-
+ obstack_1grow (&output_obstack, '\"');
for (p = tags[i]; p && *p; p++)
{
if (*p == '"' || *p == '\\')
- {
- fprintf(ftable, "\\%c", *p);
- j += 2;
- }
+ obstack_fgrow1 (&output_obstack, "\\%c", *p);
else if (*p == '\n')
- {
- fprintf(ftable, "\\n");
- j += 2;
- }
+ obstack_sgrow (&output_obstack, "\\n");
else if (*p == '\t')
- {
- fprintf(ftable, "\\t");
- j += 2;
- }
+ obstack_sgrow (&output_obstack, "\\t");
else if (*p == '\b')
- {
- fprintf(ftable, "\\b");
- j += 2;
- }
+ obstack_sgrow (&output_obstack, "\\b");
else if (*p < 040 || *p >= 0177)
- {
- fprintf(ftable, "\\%03o", *p);
- j += 4;
- }
+ obstack_fgrow1 (&output_obstack, "\\%03o", *p);
else
- {
- putc(*p, ftable);
- j++;
- }
+ obstack_1grow (&output_obstack, *p);
}
- putc ('\"', ftable);
- j++;
+ obstack_sgrow (&output_obstack, "\", ");
+ j += strsize;
}
/* add a NULL entry to list of tokens */
- fprintf (ftable, ", NULL\n};\n");
+ obstack_sgrow (&output_obstack, "NULL");
- if (! toknumflag && ! noparserflag)
- fprintf (ftable, "#endif\n\n");
+ /* Finish table and store. */
+ obstack_1grow (&output_obstack, 0);
+ macro_insert ("tname", obstack_finish (&output_obstack));
/* Output YYTOKNUM. */
- 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]);
- }
- fprintf(ftable, "\n};\n\n");
- }
+ output_table_data (&output_obstack, user_toknums,
+ 0, 1, ntokens + 1);
+ macro_insert ("toknum", obstack_finish (&output_obstack));
/* Output YYR1. */
- fputs ("\
-/* YYR1[YYN]: Symbol number of symbol that rule YYN derives. */\n\
-static const short yyr1[] = { 0", ftable);
-
- 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);
- fputs ("\n\
-};\n\
-\n", ftable);
+ output_table_data (&output_obstack, rlhs,
+ 0, 1, nrules + 1);
+ macro_insert ("r1", obstack_finish (&output_obstack));
+ XFREE (rlhs + 1);
/* Output YYR2. */
- fputs ("\
-/* YYR2[YYN]: Number of symbols composing right hand side of rule YYN. */\n\
-static const short yyr2[] = { 0", ftable);
- j = 10;
+ short_tab = XMALLOC (short, nrules + 1);
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);
+ short_tab[i] = rrhs[i + 1] - rrhs[i] - 1;
+ short_tab[nrules] = nitems - rrhs[nrules] - 1;
+ output_table_data (&output_obstack, short_tab,
+ 0, 1, nrules + 1);
+ macro_insert ("r2", obstack_finish (&output_obstack));
+ XFREE (short_tab);
+
+ XFREE (rrhs + 1);
}
-
-static 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);
-}
-
-
-
-/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable and yycheck. */
-
-static void
-output_actions (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();
-}
-
-
-
-/* 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. */
-
-static void
-token_actions (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);
-}
-
-
-
-/* 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. */
+/*------------------------------------------------------------------.
+| 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. |
+`------------------------------------------------------------------*/
static int
action_row (int state)
{
- 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 */
+ int i;
+ int j;
+ int k;
+ int m = 0;
+ int n = 0;
+ int count;
+ int default_rule;
+ int nreds;
+ int max;
+ int rule;
+ int shift_state;
+ int symbol;
+ unsigned mask;
+ unsigned *wordp;
+ reductions *redp;
+ shifts *shiftp;
+ errs *errp;
+ int nodefault = 0; /* set nonzero to inhibit having any default reduction */
for (i = 0; i < ntokens; i++)
actrow[i] = 0;
for (i = n - 1; i >= m; i--)
{
- rule = - LAruleno[i];
+ rule = -LAruleno[i];
wordp = LA + i * tokensetsize;
mask = 1;
/* and find each token which the rule finds acceptable
- to come next */
+ to come next */
for (j = 0; j < ntokens; j++)
{
/* and record this rule as the rule to use if that
for (i = 0; i < k; i++)
{
shift_state = shiftp->shifts[i];
- if (! shift_state) continue;
+ if (!shift_state)
+ continue;
symbol = accessing_symbol[shift_state];
- if (ISVAR(symbol))
+ if (ISVAR (symbol))
break;
actrow[symbol] = shift_state;
/* Now find the most common reduction and make it the default action
for this state. */
- if (nreds >= 1 && ! nodefault)
+ if (nreds >= 1 && !nodefault)
{
if (consistent[state])
default_rule = redp->rules[0];
for (i = m; i < n; i++)
{
count = 0;
- rule = - LAruleno[i];
+ rule = -LAruleno[i];
for (j = 0; j < ntokens; j++)
{
actrow[j] = 0;
}
- default_rule = - default_rule;
+ default_rule = -default_rule;
}
}
}
static void
save_row (int state)
{
- register int i;
- register int count;
- register short *sp;
- register short *sp1;
- register short *sp2;
+ int i;
+ int count;
+ short *sp;
+ short *sp1;
+ short *sp2;
count = 0;
for (i = 0; i < ntokens; i++)
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);
for (i = 0; i < ntokens; i++)
{
}
+/*------------------------------------------------------------------.
+| 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. |
+`------------------------------------------------------------------*/
+
+static void
+token_actions (void)
+{
+ int i;
+ short *yydefact = XCALLOC (short, nstates);
+
+ actrow = XCALLOC (short, ntokens);
+ for (i = 0; i < nstates; ++i)
+ {
+ yydefact[i] = action_row (i);
+ save_row (i);
+ }
-/* 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.
+ output_table_data (&output_obstack, yydefact,
+ yydefact[0], 1, nstates);
+ macro_insert ("defact", obstack_finish (&output_obstack));
+
+ XFREE (actrow);
+ XFREE (yydefact);
+}
- The yydefgoto table is output now. The detailed info
- is saved for putting into yytable later. */
static void
-goto_actions (void)
+free_shifts (void)
{
- register int i;
- register int j;
- register int k;
+ shifts *sp, *sptmp; /* JF derefrenced freed ptr */
- state_count = NEW2(nstates, short);
+ XFREE (shift_table);
- k = default_goto(ntokens);
- fprintf(ftable, "\nstatic const short yydefgoto[] = {%6d", k);
- save_column(ntokens, k);
+ for (sp = first_shift; sp; sp = sptmp)
+ {
+ sptmp = sp->next;
+ XFREE (sp);
+ }
+}
- j = 10;
- for (i = ntokens + 1; i < nsyms; i++)
+
+static void
+free_reductions (void)
+{
+ reductions *rp, *rptmp; /* JF fixed freed ptr */
+
+ XFREE (reduction_table);
+
+ for (rp = first_reduction; rp; rp = rptmp)
{
- putc(',', ftable);
+ rptmp = rp->next;
+ XFREE (rp);
+ }
+}
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
- k = default_goto(i);
- fprintf(ftable, "%6d", k);
- save_column(i, k);
+
+static void
+save_column (int symbol, int default_state)
+{
+ int i;
+ short *sp;
+ short *sp1;
+ short *sp2;
+ int count;
+ int symno;
+
+ short begin = goto_map[symbol];
+ short end = goto_map[symbol + 1];
+
+ count = 0;
+ for (i = begin; i < end; i++)
+ {
+ if (to_state[i] != default_state)
+ count++;
}
- fprintf(ftable, "\n};\n");
- FREE(state_count);
-}
+ if (count == 0)
+ return;
+
+ symno = symbol - ntokens + nstates;
+
+ froms[symno] = sp1 = sp = XCALLOC (short, count);
+ tos[symno] = sp2 = XCALLOC (short, count);
+ for (i = begin; i < end; i++)
+ {
+ if (to_state[i] != default_state)
+ {
+ *sp1++ = from_state[i];
+ *sp2++ = to_state[i];
+ }
+ }
+ tally[symno] = count;
+ width[symno] = sp1[-1] - sp[0] + 1;
+}
static int
default_goto (int symbol)
{
- register int i;
- register int m;
- register int n;
- register int default_state;
- register int max;
+ int i;
+ int m;
+ int n;
+ int default_state;
+ int max;
m = goto_map[symbol];
n = goto_map[symbol + 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. |
+`-------------------------------------------------------------------*/
+
static void
-save_column (int symbol, int default_state)
+goto_actions (void)
{
- 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;
+ short *yydefgoto = XMALLOC (short, nsyms - ntokens);
- count = 0;
- for (i = m; i < n; i++)
+ state_count = XCALLOC (short, nstates);
+ for (i = ntokens; i < nsyms; ++i)
{
- if (to_state[i] != default_state)
- count++;
+ int default_state = default_goto (i);
+ save_column (i, default_state);
+ yydefgoto[i - ntokens] = default_state;
}
- if (count == 0)
- return;
-
- symno = symbol - ntokens + nstates;
-
- froms[symno] = sp1 = sp = NEW2(count, short);
- tos[symno] = sp2 = NEW2(count, short);
+ output_table_data (&output_obstack, yydefgoto,
+ yydefgoto[0], 1, nsyms - ntokens);
+ macro_insert ("defgoto", obstack_finish (&output_obstack));
- for (i = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- {
- *sp1++ = from_state[i];
- *sp2++ = to_state[i];
- }
- }
-
- tally[symno] = count;
- width[symno] = sp1[-1] - sp[0] + 1;
+ XFREE (state_count);
+ XFREE (yydefgoto);
}
-
/* The next few functions decide how to pack the actions and gotos
information into yytable. */
static void
sort_actions (void)
{
- register int i;
- register int j;
- register int k;
- register int t;
- register int w;
+ int i;
+ int j;
+ int k;
+ int t;
+ int w;
- order = NEW2(nvectors, short);
+ order = XCALLOC (short, nvectors);
nentries = 0;
for (i = 0; i < nvectors; i++)
}
-static 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;
- }
-
- for (i = 0; i < nvectors; i++)
- {
- if (froms[i])
- FREE(froms[i]);
- if (tos[i])
- FREE(tos[i]);
- }
-
- FREE(froms);
- FREE(tos);
- FREE(pos);
-}
-
-
-
static 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;
+ int i;
+ int j;
+ int k;
+ int t;
+ int w;
+ int match;
+ int prev;
i = order[vector];
if (i >= nstates)
}
-
static 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;
+ int i;
+ int j;
+ int k;
+ int t;
+ int loc = 0;
+ int ok;
+ short *from;
+ short *to;
i = order[vector];
t = tally[i];
- if (t == 0)
- berror("pack_vector");
+ assert (t);
from = froms[i];
to = tos[i];
}
}
- berror("pack_vector");
- return 0; /* JF keep lint happy */
+ berror ("pack_vector");
+ return 0; /* JF keep lint happy */
}
-
-/* the following functions output yytable, yycheck
- and the vectors whose elements index the portion starts */
-
static void
-output_base (void)
+pack_table (void)
{
- register int i;
- register int j;
-
- fprintf(ftable, "\nstatic const short yypact[] = {%6d", base[0]);
+ int i;
+ int place;
+ int state;
- j = 10;
- for (i = 1; i < nstates; i++)
- {
- putc(',', ftable);
+ base = XCALLOC (short, nvectors);
+ pos = XCALLOC (short, nentries);
+ table = XCALLOC (short, MAXTABLE);
+ check = XCALLOC (short, MAXTABLE);
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ lowzero = 0;
+ high = 0;
- fprintf(ftable, "%6d", base[i]);
- }
+ for (i = 0; i < nvectors; i++)
+ base[i] = MINSHORT;
- fprintf(ftable, "\n};\n\nstatic const short yypgoto[] = {%6d", base[nstates]);
+ for (i = 0; i < MAXTABLE; i++)
+ check[i] = -1;
- j = 10;
- for (i = nstates + 1; i < nvectors; 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");
- FREE(base);
+ for (i = 0; i < nvectors; i++)
+ {
+ if (froms[i])
+ XFREE (froms[i]);
+ if (tos[i])
+ XFREE (tos[i]);
+ }
+
+ XFREE (froms);
+ XFREE (tos);
+ XFREE (pos);
}
+/* the following functions output yytable, yycheck
+ and the vectors whose elements index the portion starts */
static void
-output_table (void)
+output_base (void)
{
- register int i;
- register int j;
+ /* Output pact. */
+ output_table_data (&output_obstack, base,
+ base[0], 1, nstates);
+ macro_insert ("pact", obstack_finish (&output_obstack));
- 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);
+ /* Output pgoto. */
+ output_table_data (&output_obstack, base,
+ base[nstates], nstates + 1, nvectors);
+ macro_insert ("pgoto", obstack_finish (&output_obstack));
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+ XFREE (base);
+}
- fprintf(ftable, "%6d", table[i]);
- }
- fprintf(ftable, "\n};\n");
- FREE(table);
+static void
+output_table (void)
+{
+ output_table_data (&output_obstack, table,
+ table[0], 1, high + 1);
+ macro_insert ("table", obstack_finish (&output_obstack));
+ XFREE (table);
}
static void
output_check (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);
+ output_table_data (&output_obstack, check,
+ check[0], 1, high + 1);
+ macro_insert ("check", obstack_finish (&output_obstack));
+ XFREE (check);
+}
- if (j >= 10)
- {
- putc('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
+/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable
+ and yycheck. */
- fprintf(ftable, "%6d", check[i]);
- }
+static void
+output_actions (void)
+{
+ nvectors = nstates + nvars;
- fprintf(ftable, "\n};\n");
- FREE(check);
+ froms = XCALLOC (short *, nvectors);
+ tos = XCALLOC (short *, nvectors);
+ tally = XCALLOC (short, nvectors);
+ width = XCALLOC (short, nvectors);
+
+ token_actions ();
+ free_shifts ();
+ free_reductions ();
+ XFREE (lookaheads);
+ XFREE (LA);
+ XFREE (LAruleno);
+ XFREE (accessing_symbol);
+
+ goto_actions ();
+ XFREE (goto_map + ntokens);
+ XFREE (from_state);
+ XFREE (to_state);
+
+ sort_actions ();
+ pack_table ();
+ /* FIXME: See if this is useful. */
+ /* obstack_1grow (&table_obstack, '\n'); */
+ output_base ();
+ output_table ();
+ /* FIXME: See if this is useful. */
+ /* obstack_1grow (&table_obstack, '\n'); */
+ output_check ();
}
-
-
-/* copy the parser code into the ftable file at the end. */
+/*------------------------------------------.
+| Copy the parser code into TABLE_OBSTACK. |
+`------------------------------------------*/
static void
output_parser (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
+ int c;
+ FILE *fskel;
+ size_t line;
+ int actions_dumped = 0;
/* Loop over lines in the standard parser file. */
+ if (!skeleton)
+ {
+ if (semantic_parser)
+ skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY);
+ else
+ skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE);
+ }
+ fskel = xfopen (skeleton, "r");
- while (1)
+ /* New output code. */
+ line = 1;
+ c = getc (fskel);
+ while (c != EOF)
{
- 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 == '$')
+ if (c != '%')
+ {
+ if (c == '\n')
+ ++line;
+ obstack_1grow (&table_obstack, c);
+ c = getc (fskel);
+ }
+ else if ((c = getc (fskel)) == '%')
+ {
+ /* Read the macro. */
+ char* macro_key = 0;
+ char* macro_value = 0;
+ while (isalnum (c = getc (fskel)) || c == '_')
+ obstack_1grow (¯o_obstack, c);
+ obstack_1grow (¯o_obstack, 0);
+
+ /* Output the right value, or see if it's something special. */
+ macro_key = obstack_finish (¯o_obstack);
+ macro_value = macro_find (macro_key);
+ if (macro_value)
+ obstack_sgrow (&table_obstack, macro_value);
+ else if (!strcmp (macro_key, "line"))
+ obstack_fgrow1 (&table_obstack, "%d", line + 1);
+ else if (!strcmp (macro_key, "action"))
{
- /* `$' 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);
+ size_t size = obstack_object_size (&action_obstack);
+ obstack_grow (&table_obstack,
+ obstack_finish (&action_obstack), size);
}
else
- putc(c, ftable);
+ {
+ obstack_sgrow (&table_obstack, "%%");
+ obstack_sgrow (&table_obstack, macro_key);
+ }
}
- if (c == EOF)
- break;
- putc(c, ftable);
}
+
+ /* End. */
+ xfclose (fskel);
}
static void
output_program (void)
{
- register int c;
-
- if (!nolinesflag)
- fprintf(ftable, "#line %d \"%s\"\n", lineno, infile);
+ int c;
- c = getc(finput);
- while (c != EOF)
- {
- putc(c, ftable);
- c = getc(finput);
- }
+ while ((c = getc (finput)) != EOF)
+ obstack_1grow (&table_obstack, c);
}
static void
free_itemsets (void)
{
- register core *cp,*cptmp;
+ core *cp, *cptmp;
- FREE(state_table);
+ XFREE (state_table);
for (cp = first_state; cp; cp = cptmp)
{
- cptmp=cp->next;
- FREE(cp);
+ cptmp = cp->next;
+ XFREE (cp);
}
}
+/* FIXME. */
+
+#define MACRO_INSERT_INT(Key, Value) \
+{ \
+ obstack_fgrow1 (¯o_obstack, "%d", Value); \
+ obstack_1grow (¯o_obstack, 0); \
+ macro_insert (Key, obstack_finish (¯o_obstack)); \
+}
+
+#define MACRO_INSERT_STRING(Key, Value) \
+{ \
+ obstack_sgrow (¯o_obstack, Value); \
+ obstack_1grow (¯o_obstack, 0); \
+ macro_insert (Key, obstack_finish (¯o_obstack)); \
+}
+
+#define MACRO_INSERT_PREFIX(Key, Value) \
+{ \
+ obstack_fgrow2 (¯o_obstack, "%s%s", spec_name_prefix, Value); \
+ obstack_1grow (¯o_obstack, 0); \
+ macro_insert (Key, obstack_finish (¯o_obstack)); \
+}
static void
-free_shifts (void)
+prepare (void)
{
- register shifts *sp,*sptmp;/* JF derefrenced freed ptr */
-
- FREE(shift_table);
+ MACRO_INSERT_INT ("last", high);
+ MACRO_INSERT_INT ("flag", MINSHORT);
+ MACRO_INSERT_INT ("pure", pure_parser);
+ MACRO_INSERT_INT ("nsym", nsyms);
+ MACRO_INSERT_INT ("debug", debug_flag);
+ MACRO_INSERT_INT ("final", final_state);
+ MACRO_INSERT_INT ("maxtok", max_user_token_number);
+ MACRO_INSERT_INT ("ntbase", ntokens);
+ MACRO_INSERT_INT ("verbose", 0);
+
+ MACRO_INSERT_STRING ("filename", infile);
+
+ MACRO_INSERT_INT ("nnts", nvars);
+ MACRO_INSERT_INT ("nrules", nrules);
+ MACRO_INSERT_INT ("nstates", nstates);
+ MACRO_INSERT_INT ("ntokens", ntokens);
- for (sp = first_shift; sp; sp = sptmp)
+ if (spec_name_prefix)
{
- sptmp=sp->next;
- FREE(sp);
+ MACRO_INSERT_PREFIX ("yylex", "lex");
+ MACRO_INSERT_PREFIX ("yychar", "char");
+ MACRO_INSERT_PREFIX ("yylval", "lval");
+ MACRO_INSERT_PREFIX ("yydebug", "debug");
+ MACRO_INSERT_PREFIX ("yyerror", "error");
+ MACRO_INSERT_PREFIX ("yynerrs", "nerrs");
+ MACRO_INSERT_PREFIX ("yyparse", "parse");
}
}
+/*----------------------------------------------------------.
+| Output the parsing tables and the parser code to ftable. |
+`----------------------------------------------------------*/
-static void
-free_reductions (void)
+void
+output (void)
{
- register reductions *rp,*rptmp;/* JF fixed freed ptr */
-
- FREE(reduction_table);
+ obstack_init (¯o_obstack);
+ obstack_init (&output_obstack);
- for (rp = first_reduction; rp; rp = rptmp)
+#if 0
+ /* If using a simple parser the definition of YYSTYPE are put into
+ TABLE_OBSTACK. */
+ if (!semantic_parser)
{
- rptmp=rp->next;
- FREE(rp);
+ size_t size = obstack_object_size (&attrs_obstack);
+ obstack_grow (&table_obstack, obstack_finish (&attrs_obstack), size);
}
+#endif
+
+ /* reader_output_yylsp (&table_obstack); */
+ free_itemsets ();
+
+ output_token_translations ();
+ output_gram ();
+
+ XFREE (ritem);
+ if (semantic_parser)
+ output_stos ();
+ output_rule_data ();
+ output_actions ();
+
+ /* if (!no_parser_flag) */
+ prepare ();
+ output_parser ();
+ output_program ();
+
+ obstack_free (¯o_obstack, 0);
+ obstack_free (&output_obstack, 0);
}
projects / bison.git / blobdiff