/* Output the generated parsing program for bison,
- Copyright (C) 1984, 1986, 1989, 1992, 2000 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.
02111-1307, USA. */
-/* The parser tables consist of these tables.
- Starred ones needed only for the semantic parser.
- Double starred are output only if switches are set.
+/* The parser tables consist of these tables. Marked ones needed only
+ for the semantic parser. Double marked are output only if switches
+ are set.
- yytranslate = vector mapping yylex's token numbers into bison's token
- numbers.
+ YYTRANSLATE = vector mapping yylex's token numbers into bison's
+ token numbers.
- ** yytname = vector of string-names indexed by bison token number
+ ++ YYTNAME = vector of string-names indexed by bison token number.
- ** yytoknum = vector of yylex token numbers corresponding to entries
- in yytname
+ ++ YYTOKNUM = vector of yylex token numbers corresponding to
+ entries in YYTNAME.
- yyrline = vector of line-numbers of all rules. For yydebug printouts.
+ YYRLINE = vector of line-numbers of all rules. For yydebug
+ printouts.
- yyrhs = vector of items of all rules.
- This is exactly what ritems contains. For yydebug and for semantic
- parser.
+ YYRHS = vector of items of all rules. This is exactly what RITEMS
+ contains. For yydebug and for semantic parser.
- yyprhs[r] = index in yyrhs of first item for rule r.
+ YYPRHS[R] = index in YYRHS of first item for rule R.
- yyr1[r] = symbol number of symbol that rule r derives.
+ YYR1[R] = symbol number of symbol that rule R derives.
- yyr2[r] = number of symbols composing right hand side of rule r.
+ YYR2[R] = number of symbols composing right hand side of rule R.
- * yystos[s] = the symbol number of the symbol that leads to state s.
+ + YYSTOS[S] = the symbol number of the symbol that leads to state
+ S.
- yydefact[s] = default rule to reduce with in state s,
- when yytable doesn't specify something else to do.
- Zero means the default is an error.
+ YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE
+ doesn't specify something else to do. Zero means the default is an
+ error.
- yydefgoto[i] = default state to go to after a reduction of a rule that
- generates variable ntokens + i, except when yytable
- specifies something else to do.
+ YYDEFGOTO[I] = default state to go to after a reduction of a rule
+ that generates variable NTOKENS + I, except when YYTABLE specifies
+ something else to do.
- yypact[s] = index in yytable of the portion describing state s.
- The lookahead token's type is used to index that portion
- to find out what to do.
+ 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 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.
+ 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.
+ 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.
+ 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.
+ 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.
+ 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.
-*/
+ YYFINAL = the state number of the termination state. YYFLAG = most
+ negative short int. Used to flag ?? */
#include "system.h"
+#include "quotearg.h"
+#include "error.h"
#include "getargs.h"
-#include "xalloc.h"
#include "files.h"
#include "gram.h"
#include "LR0.h"
#include "output.h"
#include "lalr.h"
#include "reader.h"
+#include "symtab.h"
#include "conflicts.h"
+#include "muscle_tab.h"
-extern void berror PARAMS((const char *));
-
+/* 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 short *tally = NULL;
+static short *width = NULL;
+static short *actrow = NULL;
+static short *state_count = NULL;
+static short *order = NULL;
+static short *base = NULL;
+static short *pos = NULL;
+static short *table = NULL;
+static short *check = NULL;
static int lowzero;
static int high;
+struct obstack muscle_obstack;
+static struct obstack format_obstack;
+int error_verbose = 0;
-static inline void
-output_short_table (FILE *out,
- const char *comment,
- const char *table_name,
- short *short_table,
- short first_value,
- short begin, short end)
+/* Returns the number of lines of S. */
+size_t
+get_lines_number (const char *s)
{
- int i, j;
-
- if (comment)
- fprintf (out, "/* %s. */\n", comment);
-
- fprintf (out, "static const short %s[] =\n{\n %6d",
- table_name, first_value);
-
- j = 1;
- for (i = begin; i < end; i++)
- {
- putc (',', out);
-
- if (j >= 10)
- {
- fputs ("\n ", out);
- j = 1;
- }
- else
- {
- j++;
- }
+ size_t lines = 0;
- fprintf (out, "%6d", short_table[i]);
- }
+ size_t i;
+ for (i = 0; s[i]; ++i)
+ if (s[i] == '\n')
+ ++lines;
- fprintf (out, "\n};\n");
+ return lines;
}
-/*--------------------------------------------------------------.
-| output_headers -- Output constant strings to the beginning of |
-| certain files. |
-`--------------------------------------------------------------*/
-
-#define GUARDSTR \
-"\n\
-#include \"%s\"\n\
-extern int yyerror;\n\
-extern int yycost;\n\
-extern char * yymsg;\n\
-extern YYSTYPE yyval;\n\
-\n\
-yyguard(n, yyvsp, yylsp)\n\
-register int n;\n\
-register YYSTYPE *yyvsp;\n\
-register YYLTYPE *yylsp;\n\
-{\n\
- yyerror = 0;\n\
- yycost = 0;\n\
- yymsg = 0;\n\
- switch (n)\n\
- {"
-
-#define ACTSTR \
-"\n\
-#include \"%s\"\n\
-extern YYSTYPE yyval;\n\
-extern int yychar;\n\
-\n\
-yyaction(n, yyvsp, yylsp)\n\
-register int n;\n\
-register YYSTYPE *yyvsp;\n\
-register YYLTYPE *yylsp;\n\
-{\n\
- switch (n)\n\
- {"
-
-#define ACTSTR_SIMPLE "\n switch (yyn) {\n"
+/* FIXME. */
-void
-output_headers (void)
+static inline void
+output_table_data (struct obstack *oout,
+ short *table_data,
+ short first,
+ int begin,
+ int end)
{
- if (semantic_parser)
- fprintf (fguard, GUARDSTR, attrsfile);
-
- if (no_parser_flag)
- 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");
-*/
+ int i;
+ int j = 1;
- /* Rename certain symbols if -p was specified. */
- if (spec_name_prefix)
+ obstack_fgrow1 (oout, "%6d", first);
+ for (i = begin; i < end; ++i)
{
- 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);
+ obstack_1grow (oout, ',');
+ if (j >= 10)
+ {
+ obstack_sgrow (oout, "\n ");
+ j = 1;
+ }
+ else
+ ++j;
+ obstack_fgrow1 (oout, "%6d", table_data[i]);
}
+ obstack_1grow (oout, 0);
}
-/*-------------------------------------------------------.
-| Output constant strings to the ends of certain files. |
-`-------------------------------------------------------*/
-
-void
-output_trailers (void)
-{
- if (semantic_parser)
- fprintf (fguard, "\n }\n}\n");
-
- fprintf (faction, "\n");
-
- if (no_parser_flag)
- return;
-
- if (semantic_parser)
- fprintf (faction, " }\n");
- fprintf (faction, "}\n");
-}
-
-
-
static void
output_token_translations (void)
{
- int i, j;
-/* 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 (&format_obstack, token_translations,
+ 0, 1, max_user_token_number + 1);
+ muscle_insert ("translate", obstack_finish (&format_obstack));
+ XFREE (token_translations);
}
static void
output_gram (void)
{
- /* With the ordinary parser,
- yyprhs and yyrhs are needed only for yydebug. */
- /* With the no_parser option, all tables are generated */
- if (!semantic_parser && !no_parser_flag)
- fprintf (ftable, "\n#if YYDEBUG != 0\n");
+ {
+ int i;
+ short *values = XCALLOC (short, nrules + 1);
+ for (i = 0; i < nrules + 1; ++i)
+ values[i] = rules[i].rhs;
+ output_table_data (&format_obstack, values,
+ 0, 1, nrules + 1);
+ XFREE (values);
+ }
- output_short_table (ftable, NULL, "yyprhs", rrhs,
- 0, 1, nrules + 1);
+ muscle_insert ("prhs", obstack_finish (&format_obstack));
{
- size_t yyrhs_size = 1;
- short *yyrhs, *sp;
+ short *yyrhs;
int i;
- for (sp = ritem + 1; *sp; sp++)
- ++yyrhs_size;
- yyrhs = XMALLOC (short, yyrhs_size);
+ yyrhs = XMALLOC (short, nritems);
- for (sp = ritem + 1, i = 1; *sp; ++sp, ++i)
- yyrhs[i] = *sp > 0 ? *sp : 0;
+ for (i = 1; i < nritems; ++i)
+ yyrhs[i] = ritem[i] >= 0 ? ritem[i] : -1;
+
+ output_table_data (&format_obstack, yyrhs,
+ ritem[0], 1, nritems);
+ muscle_insert ("rhs", obstack_finish (&format_obstack));
- output_short_table (ftable, NULL, "yyrhs", yyrhs,
- ritem[0], 1, yyrhs_size);
XFREE (yyrhs);
}
- if (!semantic_parser && !no_parser_flag)
- fprintf (ftable, "\n#endif\n");
+#if 0
+ if (!semantic_parser)
+ obstack_sgrow (&table_obstack, "\n#endif\n");
+#endif
}
static void
output_stos (void)
{
- output_short_table (ftable, NULL, "yystos", accessing_symbol,
- 0, 1, nstates);
+ int i;
+ short *values = (short *) alloca (sizeof (short) * nstates);
+ for (i = 0; i < nstates; ++i)
+ values[i] = states[i]->accessing_symbol;
+ output_table_data (&format_obstack, values,
+ 0, 1, nstates);
+ muscle_insert ("stos", obstack_finish (&format_obstack));
}
int j;
short *short_tab = NULL;
- fputs ("\n\
-#if YYDEBUG != 0\n",
- ftable);
-
- output_short_table (ftable,
- "YYRLINE[YYN] -- source line where rule number YYN was defined",
- "yyrline", rline,
- 0, 1, nrules + 1);
-
- fputs ("#endif\n\n", ftable);
-
- if (token_table_flag || no_parser_flag)
- {
- 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);
- }
+ {
+ short *values = XCALLOC (short, nrules + 1);
+ for (i = 0; i < nrules + 1; ++i)
+ values[i] = rules[i].line;
+ output_table_data (&format_obstack, values,
+ 0, 1, nrules + 1);
+ muscle_insert ("rline", obstack_finish (&format_obstack));
+ XFREE (values);
+ }
- /* Output the table of symbol names. */
- if (!token_table_flag && !no_parser_flag)
- fputs ("\n#if YYDEBUG != 0 || defined YYERROR_VERBOSE\n\n", ftable);
- fputs ("\
-/* YYTNAME[TOKEN_NUM] -- String name of the token TOKEN_NUM. */\n",
- ftable);
- fprintf (ftable,
- "static const char *const yytname[] =\n{\n ");
j = 0;
for (i = 0; i < nsyms; i++)
- /* this used to be i<=nsyms, but that output a final "" symbol
- almost by accident */
{
+ /* Be sure not to use twice the same quotearg slot. */
+ const char *cp =
+ quotearg_n_style (1, c_quoting_style,
+ quotearg_style (escape_quoting_style, symbols[i]->tag));
/* Width of the next token, including the two quotes, the coma
and the space. */
- int strsize = 4;
- char *p;
-
- 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++;
+ int strsize = strlen (cp) + 2;
if (j + strsize > 75)
{
- fputs ("\n ", ftable);
+ obstack_sgrow (&format_obstack, "\n ");
j = 2;
}
- putc ('\"', ftable);
- for (p = tags[i]; p && *p; p++)
- {
- if (*p == '"' || *p == '\\')
- {
- fprintf (ftable, "\\%c", *p);
- }
- else if (*p == '\n')
- {
- fprintf (ftable, "\\n");
- }
- else if (*p == '\t')
- {
- fprintf (ftable, "\\t");
- }
- else if (*p == '\b')
- {
- fprintf (ftable, "\\b");
- }
- else if (*p < 040 || *p >= 0177)
- {
- fprintf (ftable, "\\%03o", *p);
- }
- else
- {
- putc (*p, ftable);
- }
- }
-
- fputs ("\", ", ftable);
+ obstack_sgrow (&format_obstack, cp);
+ obstack_sgrow (&format_obstack, ", ");
j += strsize;
}
/* add a NULL entry to list of tokens */
- fprintf (ftable, "NULL\n};\n");
+ obstack_sgrow (&format_obstack, "NULL");
- if (!token_table_flag && !no_parser_flag)
- fprintf (ftable, "#endif\n\n");
+ /* Finish table and store. */
+ obstack_1grow (&format_obstack, 0);
+ muscle_insert ("tname", obstack_finish (&format_obstack));
/* Output YYTOKNUM. */
- if (token_table_flag)
- {
- output_short_table (ftable,
- "YYTOKNUM[YYLEX] -- Index in YYTNAME corresponding to YYLEX",
- "yytoknum", user_toknums,
- 0, 1, ntokens + 1);
- }
+ {
+ short *values = XCALLOC (short, ntokens + 1);
+ for (i = 0; i < ntokens + 1; ++i)
+ values[i] = symbols[i]->user_token_number;
+ output_table_data (&format_obstack, values,
+ 0, 1, ntokens + 1);
+ muscle_insert ("toknum", obstack_finish (&format_obstack));
+ XFREE (values);
+ }
- /* Output YYR1. */
- output_short_table (ftable,
- "YYR1[YYN] -- Symbol number of symbol that rule YYN derives",
- "yyr1", rlhs,
- 0, 1, nrules + 1);
- XFREE (rlhs + 1);
- putc ('\n', ftable);
+ /* Output YYR1. */
+ {
+ short *values = XCALLOC (short, nrules + 1);
+ for (i = 0; i < nrules + 1; ++i)
+ values[i] = rules[i].lhs;
+ output_table_data (&format_obstack, values,
+ 0, 1, nrules + 1);
+ muscle_insert ("r1", obstack_finish (&format_obstack));
+ XFREE (values);
+ }
/* Output YYR2. */
short_tab = XMALLOC (short, nrules + 1);
for (i = 1; i < nrules; i++)
- short_tab[i] = rrhs[i + 1] - rrhs[i] - 1;
- short_tab[nrules] = nitems - rrhs[nrules] - 1;
- output_short_table (ftable,
- "YYR2[YYN] -- Number of symbols composing right hand side of rule YYN",
- "yyr2", short_tab,
- 0, 1, nrules + 1);
- putc ('\n', ftable);
-
+ short_tab[i] = rules[i + 1].rhs - rules[i].rhs - 1;
+ short_tab[nrules] = nritems - rules[nrules].rhs - 1;
+ output_table_data (&format_obstack, short_tab,
+ 0, 1, nrules + 1);
+ muscle_insert ("r2", obstack_finish (&format_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);
}
-
/*------------------------------------------------------------------.
| 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 |
`------------------------------------------------------------------*/
static int
-action_row (int state)
+action_row (state_t *state)
{
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 */
+ int default_rule = 0;
+ reductions *redp = state->reductions;
+ shifts *shiftp = state->shifts;
+ errs *errp = state->errs;
+ /* set nonzero to inhibit having any default reduction */
+ int nodefault = 0;
for (i = 0; i < ntokens; i++)
actrow[i] = 0;
- default_rule = 0;
- nreds = 0;
- redp = reduction_table[state];
-
- if (redp)
+ if (redp->nreds >= 1)
{
- nreds = redp->nreds;
-
- if (nreds >= 1)
- {
- /* loop over all the rules available here which require
- lookahead */
- m = lookaheads[state];
- n = lookaheads[state + 1];
-
- for (i = n - 1; i >= m; i--)
- {
- rule = -LAruleno[i];
- wordp = LA + i * tokensetsize;
- mask = 1;
-
- /* and find each token which the rule finds acceptable
- to come next */
- for (j = 0; j < ntokens; j++)
- {
- /* and record this rule as the rule to use if that
- token follows. */
- if (mask & *wordp)
- actrow[j] = rule;
-
- mask <<= 1;
- if (mask == 0)
- {
- mask = 1;
- wordp++;
- }
- }
- }
- }
+ int j;
+ /* 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 */
+ for (j = 0; j < ntokens; j++)
+ /* and record this rule as the rule to use if that
+ token follows. */
+ if (BITISSET (LA (state->lookaheadsp + i), j))
+ actrow[j] = -LAruleno[state->lookaheadsp + i];
}
- 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)
+ for (i = 0; i < shiftp->nshifts; i++)
{
- k = shiftp->nshifts;
+ int symbol;
+ int shift_state = shiftp->shifts[i];
+ if (!shift_state)
+ continue;
- for (i = 0; i < k; i++)
- {
- shift_state = shiftp->shifts[i];
- if (!shift_state)
- continue;
-
- symbol = accessing_symbol[shift_state];
+ symbol = states[shift_state]->accessing_symbol;
- if (ISVAR (symbol))
- break;
+ if (ISVAR (symbol))
+ break;
- actrow[symbol] = shift_state;
+ actrow[symbol] = shift_state;
- /* Do not use any default reduction if there is a shift for
- error */
- if (symbol == error_token_number)
- nodefault = 1;
- }
+ /* Do not use any default reduction if there is a shift for
+ error */
+ if (symbol == error_token_number)
+ nodefault = 1;
}
- errp = err_table[state];
-
/* See which tokens are an explicit error in this state (due to
%nonassoc). For them, record MINSHORT as the action. */
-
- if (errp)
+ for (i = 0; i < errp->nerrs; i++)
{
- k = errp->nerrs;
-
- for (i = 0; i < k; i++)
- {
- symbol = errp->errs[i];
- actrow[symbol] = MINSHORT;
- }
+ int symbol = errp->errs[i];
+ actrow[symbol] = MINSHORT;
}
/* Now find the most common reduction and make it the default action
for this state. */
- if (nreds >= 1 && !nodefault)
+ if (redp->nreds >= 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;
+ int rule = -LAruleno[state->lookaheadsp + i];
+ int j;
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == rule)
- count++;
- }
+ if (actrow[j] == rule)
+ count++;
if (count > max)
{
if (max > 0)
{
+ int j;
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == default_rule)
- actrow[j] = 0;
- }
+ if (actrow[j] == default_rule)
+ actrow[j] = 0;
default_rule = -default_rule;
}
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] == MINSHORT)
+ actrow[i] = 0;
return default_rule;
}
count = 0;
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- count++;
- }
+ if (actrow[i] != 0)
+ count++;
if (count == 0)
return;
tos[state] = sp2 = XCALLOC (short, count);
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- {
- *sp1++ = i;
- *sp2++ = actrow[i];
- }
- }
+ if (actrow[i] != 0)
+ {
+ *sp1++ = i;
+ *sp2++ = actrow[i];
+ }
tally[state] = count;
width[state] = sp1[-1] - sp[0] + 1;
actrow = XCALLOC (short, ntokens);
for (i = 0; i < nstates; ++i)
{
- yydefact[i] = action_row (i);
+ yydefact[i] = action_row (states[i]);
save_row (i);
}
- XFREE (actrow);
- output_short_table (ftable, NULL, "yydefact", yydefact,
- yydefact[0], 1, nstates);
+ output_table_data (&format_obstack, yydefact,
+ yydefact[0], 1, nstates);
+ muscle_insert ("defact", obstack_finish (&format_obstack));
+
+ XFREE (actrow);
XFREE (yydefact);
}
-static void
-free_shifts (void)
-{
- shifts *sp, *sptmp; /* JF derefrenced freed ptr */
+/*-----------------------------.
+| Output the actions to OOUT. |
+`-----------------------------*/
- XFREE (shift_table);
-
- for (sp = first_shift; sp; sp = sptmp)
- {
- sptmp = sp->next;
- XFREE (sp);
- }
+void
+actions_output (FILE *out)
+{
+ int rule;
+ for (rule = 1; rule < nrules + 1; ++rule)
+ if (rules[rule].action)
+ {
+ fprintf (out, " case %d:\n", rule);
+
+ if (!no_lines_flag)
+ fprintf (out, muscle_find ("linef"),
+ rules[rule].action_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ /* As a Bison extension, add the ending semicolon. Since some
+ Yacc don't do that, help people using bison as a Yacc
+ finding their missing semicolons. */
+ fprintf (out, "{ %s%s }\n break;\n\n",
+ rules[rule].action,
+ yacc_flag ? ";" : "");
+ }
}
-static void
-free_reductions (void)
+/*----------------------------.
+| Output the guards to OOUT. |
+`----------------------------*/
+
+void
+guards_output (FILE *out)
{
- reductions *rp, *rptmp; /* JF fixed freed ptr */
+ int rule;
+ for (rule = 1; rule < nrules + 1; ++rule)
+ if (rules[rule].guard)
+ {
+ fprintf (out, " case %d:\n", rule);
+
+ if (!no_lines_flag)
+ fprintf (out, muscle_find ("linef"),
+ rules[rule].guard_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ fprintf (out, "{ %s; }\n break;\n\n",
+ rules[rule].guard);
+ }
+}
- XFREE (reduction_table);
- for (rp = first_reduction; rp; rp = rptmp)
+/*---------------------------------------.
+| Output the tokens definition to OOUT. |
+`---------------------------------------*/
+
+void
+token_definitions_output (FILE *out)
+{
+ int i;
+ for (i = 0; i < ntokens; ++i)
{
- rptmp = rp->next;
- XFREE (rp);
+ bucket *symbol = symbols[i];
+ int number = symbol->user_token_number;
+
+ if (number == SALIAS)
+ continue;
+ /* Skip error token. */
+ if (symbol->value == error_token_number)
+ continue;
+ if (symbol->tag[0] == '\'')
+ continue; /* skip literal character */
+ if (symbol->tag[0] == '\"')
+ {
+ /* use literal string only if given a symbol with an alias */
+ if (symbol->alias)
+ symbol = symbol->alias;
+ else
+ 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, "# define %s\t%d\n",
+ symbol->tag, number);
+ if (semantic_parser)
+ /* FIXME: This is probably wrong, and should be just as
+ above. --akim. */
+ fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->value);
}
}
-
static void
save_column (int symbol, int default_state)
{
int i;
- int m;
- int n;
short *sp;
short *sp1;
short *sp2;
int count;
- int symno;
+ int symno = symbol - ntokens + nstates;
- m = goto_map[symbol];
- n = goto_map[symbol + 1];
+ short begin = goto_map[symbol];
+ short end = goto_map[symbol + 1];
count = 0;
- for (i = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- count++;
- }
+ for (i = begin; i < end; i++)
+ if (to_state[i] != default_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 = m; i < n; i++)
- {
- if (to_state[i] != default_state)
- {
- *sp1++ = from_state[i];
- *sp2++ = to_state[i];
- }
- }
+ 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;
default_goto (int symbol)
{
int i;
- int m;
- int n;
- int default_state;
- int max;
-
- m = goto_map[symbol];
- n = goto_map[symbol + 1];
+ int m = goto_map[symbol];
+ int n = goto_map[symbol + 1];
+ int default_state = -1;
+ int max = 0;
if (m == n)
return -1;
for (i = m; i < n; i++)
state_count[to_state[i]]++;
- max = 0;
- default_state = -1;
-
for (i = 0; i < nstates; i++)
- {
- if (state_count[i] > max)
- {
- max = state_count[i];
- default_state = i;
- }
- }
+ if (state_count[i] > max)
+ {
+ max = state_count[i];
+ default_state = i;
+ }
return default_state;
}
static void
goto_actions (void)
{
- int i, j, k;
+ int i;
+ short *yydefgoto = XMALLOC (short, nsyms - ntokens);
state_count = XCALLOC (short, nstates);
-
- k = default_goto (ntokens);
- fprintf (ftable, "\nstatic const short yydefgoto[] = {%6d", k);
- save_column (ntokens, k);
-
- j = 10;
- for (i = ntokens + 1; i < nsyms; i++)
+ for (i = ntokens; i < nsyms; ++i)
{
- putc (',', ftable);
-
- if (j >= 10)
- {
- putc ('\n', ftable);
- j = 1;
- }
- else
- {
- j++;
- }
-
- k = default_goto (i);
- fprintf (ftable, "%6d", k);
- save_column (i, k);
+ int default_state = default_goto (i);
+ save_column (i, default_state);
+ yydefgoto[i - ntokens] = default_state;
}
- fprintf (ftable, "\n};\n");
+ output_table_data (&format_obstack, yydefgoto,
+ yydefgoto[0], 1, nsyms - ntokens);
+ muscle_insert ("defgoto", obstack_finish (&format_obstack));
+
XFREE (state_count);
+ XFREE (yydefgoto);
}
sort_actions (void)
{
int i;
- int j;
- int k;
- int t;
- int w;
order = XCALLOC (short, nvectors);
nentries = 0;
for (i = 0; i < nvectors; i++)
- {
- if (tally[i] > 0)
- {
- t = tally[i];
- w = width[i];
- j = nentries - 1;
+ 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))
+ j--;
- while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
- 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];
+ for (k = nentries - 1; k > j; k--)
+ order[k + 1] = order[k];
- order[j + 1] = i;
- nentries++;
- }
- }
+ order[j + 1] = i;
+ nentries++;
+ }
}
static int
matching_state (int vector)
{
- int i;
- int j;
- int k;
+ int i = order[vector];
int t;
int w;
- int match;
int prev;
- i = order[vector];
if (i >= nstates)
return -1;
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;
- 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;
static int
pack_vector (int vector)
{
- int i;
+ int i = order[vector];
int j;
- int k;
- int t;
+ int t = tally[i];
int loc = 0;
- int ok;
- short *from;
- short *to;
-
- i = order[vector];
- t = tally[i];
+ short *from = froms[i];
+ short *to = tos[i];
assert (t);
- from = froms[i];
- to = tos[i];
-
for (j = lowzero - from[0]; j < MAXTABLE; j++)
{
- ok = 1;
+ int k;
+ int ok = 1;
for (k = 0; ok && k < t; k++)
{
}
for (k = 0; ok && k < vector; k++)
- {
- if (pos[k] == j)
- ok = 0;
- }
+ if (pos[k] == j)
+ ok = 0;
if (ok)
{
return j;
}
}
-
- berror ("pack_vector");
- return 0; /* JF keep lint happy */
+#define pack_vector_succeeded 0
+ assert (pack_vector_succeeded);
+ return 0;
}
for (i = 0; i < nvectors; i++)
{
- if (froms[i])
- XFREE (froms[i]);
- if (tos[i])
- XFREE (tos[i]);
+ XFREE (froms[i]);
+ XFREE (tos[i]);
}
XFREE (froms);
static void
output_base (void)
{
- output_short_table (ftable, NULL, "yypact", base,
- base[0], 1, nstates);
-
- putc ('\n', ftable);
+ /* Output pact. */
+ output_table_data (&format_obstack, base,
+ base[0], 1, nstates);
+ muscle_insert ("pact", obstack_finish (&format_obstack));
- output_short_table (ftable, NULL, "yypgoto", base,
- base[nstates], nstates + 1, nvectors);
+ /* Output pgoto. */
+ output_table_data (&format_obstack, base,
+ base[nstates], nstates + 1, nvectors);
+ muscle_insert ("pgoto", obstack_finish (&format_obstack));
XFREE (base);
}
static void
output_table (void)
{
- fprintf (ftable, "\n\n#define\tYYLAST\t\t%d\n\n\n", high);
- output_short_table (ftable, NULL, "yytable", table,
- table[0], 1, high + 1);
+ output_table_data (&format_obstack, table,
+ table[0], 1, high + 1);
+ muscle_insert ("table", obstack_finish (&format_obstack));
XFREE (table);
}
static void
output_check (void)
{
- output_short_table (ftable, NULL, "yycheck", check,
- check[0], 1, high + 1);
+ output_table_data (&format_obstack, check,
+ check[0], 1, high + 1);
+ muscle_insert ("check", obstack_finish (&format_obstack));
XFREE (check);
}
static void
output_actions (void)
{
+ int i;
nvectors = nstates + nvars;
froms = 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);
sort_actions ();
pack_table ();
- putc ('\n', ftable);
+
output_base ();
output_table ();
- putc ('\n', ftable);
+
output_check ();
+
+ for (i = 0; i < nstates; ++i)
+ {
+ free (states[i]->shifts);
+ XFREE (states[i]->reductions);
+ free (states[i]->errs);
+ free (states[i]);
+ }
+ XFREE (states);
}
-/* copy the parser code into the ftable file at the end. */
+\f
+/*---------------------------.
+| Call the skeleton parser. |
+`---------------------------*/
static void
-output_parser (void)
+output_skeleton (void)
{
- int c;
- static int number_of_dollar_signs = 0;
-#ifdef DONTDEF
- FILE *fpars;
-#else
-#define fpars fparser
-#endif
+ /* Find the right skeleton file. */
+ if (!skeleton)
+ {
+ if (semantic_parser)
+ skeleton = "bison.hairy";
+ else
+ skeleton = "bison.simple";
+ }
- if (pure_parser)
- fprintf (ftable, "#define YYPURE 1\n\n");
+ /* Parse the skeleton file and output the needed parsers. */
+ muscle_insert ("skeleton", skeleton);
-#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
+ /* Store the definition of all the muscles. */
+ {
+ FILE *muscles_m4 = xfopen ("/tmp/muscles.m4", "w");
+ /* There are no comments, especially not `#': we do want M4 expansion
+ after `#': think of CPP macros! */
+ fprintf (muscles_m4, "m4_changecom()\n");
+ fprintf (muscles_m4, "m4_init()\n");
- /* Loop over lines in the standard parser file. */
+ fprintf (muscles_m4, "m4_define([b4_actions], \n[[");
+ actions_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
- while (1)
- {
- int write_line = 1;
-
- c = getc (fpars);
-
- /* See if the line starts with `#line.
- If so, set write_line to 0. */
- if (no_lines_flag)
- 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 == '$')
- {
- number_of_dollar_signs++;
- assert (number_of_dollar_signs == 1);
- /* `$' 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);
- /* Skip the end of the line containing `$'. */
- write_line = 0;
- }
- else
- putc (c, ftable);
- }
- if (c == EOF)
- break;
- putc (c, ftable);
- }
- assert (number_of_dollar_signs == 1);
+ fprintf (muscles_m4, "m4_define([b4_guards], \n[[");
+ guards_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
+
+ fprintf (muscles_m4, "m4_define([b4_tokendef], \n[[");
+ token_definitions_output (muscles_m4);
+ fprintf (muscles_m4, "]])\n\n");
+
+ muscles_m4_output (muscles_m4);
+
+ fprintf (muscles_m4, "m4_wrap([m4_divert_pop(0)])\n");
+ fprintf (muscles_m4, "m4_divert_push(0)dnl\n");
+ xfclose (muscles_m4);
+ }
+
+ /* Invoke m4 on the definition of the muscles, and the skeleton. */
+ {
+ const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
+ if (!bison_pkgdatadir)
+ bison_pkgdatadir = PKGDATADIR;
+ skel_in = readpipe ("m4",
+ "-I",
+ bison_pkgdatadir,
+ "m4sugar/m4sugar.m4",
+ "/tmp/muscles.m4",
+ skeleton,
+ NULL);
+ if (!skel_in)
+ error (EXIT_FAILURE, errno, "cannot run m4");
+ skel_lex ();
+ }
}
static void
-output_program (void)
+prepare (void)
{
- int c;
-
- if (!no_lines_flag)
- fprintf (ftable, "#line %d \"%s\"\n", lineno, infile);
-
- c = getc (finput);
- while (c != EOF)
- {
- putc (c, ftable);
- c = getc (finput);
- }
+ MUSCLE_INSERT_INT ("last", high);
+ MUSCLE_INSERT_INT ("flag", MINSHORT);
+ MUSCLE_INSERT_INT ("pure", pure_parser);
+ MUSCLE_INSERT_INT ("nsym", nsyms);
+ MUSCLE_INSERT_INT ("debug", debug_flag);
+ MUSCLE_INSERT_INT ("final", final_state);
+ MUSCLE_INSERT_INT ("maxtok", 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);
}
+/*-------------------------.
+| Output the header file. |
+`-------------------------*/
static void
-free_itemsets (void)
+header_output (void)
{
- core *cp, *cptmp;
-
- XFREE (state_table);
+ FILE *out = xfopen (spec_defines_file, "w");
+ char *macro_name = compute_header_macro ();
+
+ fprintf (out, "#ifndef %s\n", macro_name);
+ fprintf (out, "# define %s\n\n", macro_name);
+
+ token_definitions_output (out);
+ fprintf (out, "\
+#ifndef YYSTYPE\n\
+typedef %s
+yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n",
+ muscle_find ("stype"));
+
+ if (!pure_parser)
+ fprintf (out, "\nextern YYSTYPE %slval;\n",
+ spec_name_prefix ? spec_name_prefix : "yy");
+
+ if (locations_flag)
+ {
+ fputs ("\n\n", out);
+ fprintf (out, "\
+#ifndef YYLTYPE\n\
+typedef struct yyltype\n\
+{\n\
+ int first_line;\n\
+ int first_column;\n\
+ int last_line;\n\
+ int last_column;\n\
+} yyltype;\n\
+# define YYLTYPE yyltype\n\
+#endif\n");
+ if (!pure_parser)
+ fprintf (out, "\nextern YYLTYPE %slloc;\n",
+ spec_name_prefix ? spec_name_prefix : "yy");
+ }
- for (cp = first_state; cp; cp = cptmp)
+ if (semantic_parser)
{
- cptmp = cp->next;
- XFREE (cp);
+ int i;
+
+ for (i = ntokens; i < nsyms; i++)
+ /* don't make these for dummy nonterminals made by gensym. */
+ if (*symbols[i]->tag != '@')
+ fprintf (out, "# define NT%s\t%d\n", symbols[i]->tag, i);
}
+
+ fprintf (out, "\n#endif /* not %s */\n", macro_name);
+ free (macro_name);
+ xfclose (out);
}
void
output (void)
{
- int c;
+ obstack_init (&format_obstack);
- /* output_token_defines(ftable); / * JF put out token defines FIRST */
- if (!semantic_parser) /* JF Put out other stuff */
- {
- rewind (fattrs);
- while ((c = getc (fattrs)) != EOF)
- putc (c, ftable);
- }
- reader_output_yylsp (ftable);
- if (debug_flag)
- fputs ("\
-#ifndef YYDEBUG\n\
-# define YYDEBUG 1\n\
-#endif\n\
-\n",
- ftable);
-
- if (semantic_parser)
- fprintf (ftable, "#include \"%s\"\n", attrsfile);
-
- if (!no_parser_flag)
- fprintf (ftable, "#include <stdio.h>\n\n");
-
- /* Make "const" do nothing if not in ANSI C. */
- fputs ("\
-#ifndef __cplusplus\n\
-# ifndef __STDC__\n\
-# define const\n\
-# endif\n\
-#endif\n\
-\n",
- ftable);
-
- free_itemsets ();
- output_defines ();
output_token_translations ();
-/* if (semantic_parser) */
- /* This is now unconditional because debugging printouts can use it. */
output_gram ();
+
XFREE (ritem);
if (semantic_parser)
output_stos ();
output_rule_data ();
output_actions ();
- if (!no_parser_flag)
- output_parser ();
- output_program ();
+
+ prepare ();
+ /* Copy definitions in directive. */
+ obstack_1grow (&attrs_obstack, 0);
+ muscle_insert ("prologue", obstack_finish (&attrs_obstack));
+
+ /* Process the selected skeleton file. */
+ output_skeleton ();
+
+ /* Output the header if needed. */
+
+ if (0)
+ header_output ();
+
+ free (rules + 1);
+ obstack_free (&muscle_obstack, NULL);
+ obstack_free (&format_obstack, NULL);
+ obstack_free (&action_obstack, NULL);
+ obstack_free (&attrs_obstack, NULL);
}
projects / bison.git / blobdiff