/* Output the generated parsing program for bison,
- Copyright 1984, 1986, 1989, 1992, 2000, 2001 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. */
-/* 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 "output.h"
#include "lalr.h"
#include "reader.h"
+#include "symtab.h"
#include "conflicts.h"
#include "muscle_tab.h"
get_lines_number (const char *s)
{
size_t lines = 0;
-
+
size_t i;
for (i = 0; s[i]; ++i)
- {
- if (s[i] == '\n')
- ++lines;
- }
-
+ if (s[i] == '\n')
+ ++lines;
+
return lines;
}
output_table_data (struct obstack *oout,
short *table_data,
short first,
- short begin,
- short end)
+ int begin,
+ int end)
{
int i;
int j = 1;
int i;
short *values = XCALLOC (short, nrules + 1);
for (i = 0; i < nrules + 1; ++i)
- values[i] = rule_table[i].rhs;
+ values[i] = rules[i].rhs;
output_table_data (&format_obstack, values,
0, 1, nrules + 1);
XFREE (values);
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, yyrhs_size);
+ ritem[0], 1, nritems);
muscle_insert ("rhs", obstack_finish (&format_obstack));
XFREE (yyrhs);
{
short *values = XCALLOC (short, nrules + 1);
for (i = 0; i < nrules + 1; ++i)
- values[i] = rule_table[i].line;
+ values[i] = rules[i].line;
output_table_data (&format_obstack, values,
0, 1, nrules + 1);
muscle_insert ("rline", obstack_finish (&format_obstack));
/* 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, tags[i]));
+ quotearg_style (escape_quoting_style, symbols[i]->tag));
/* Width of the next token, including the two quotes, the coma
and the space. */
int strsize = strlen (cp) + 2;
muscle_insert ("tname", obstack_finish (&format_obstack));
/* Output YYTOKNUM. */
- output_table_data (&format_obstack, user_toknums,
- 0, 1, ntokens + 1);
- muscle_insert ("toknum", obstack_finish (&format_obstack));
+ {
+ 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. */
{
short *values = XCALLOC (short, nrules + 1);
for (i = 0; i < nrules + 1; ++i)
- values[i] = rule_table[i].lhs;
+ values[i] = rules[i].lhs;
output_table_data (&format_obstack, values,
0, 1, nrules + 1);
muscle_insert ("r1", obstack_finish (&format_obstack));
/* Output YYR2. */
short_tab = XMALLOC (short, nrules + 1);
for (i = 1; i < nrules; i++)
- short_tab[i] = rule_table[i + 1].rhs - rule_table[i].rhs - 1;
- short_tab[nrules] = nitems - rule_table[nrules].rhs - 1;
+ 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));
`------------------------------------------------------------------*/
static int
-action_row (int state)
+action_row (state_t *state)
{
int i;
- int m = 0;
- int n = 0;
int default_rule = 0;
- reductions *redp = state_table[state]->reductions;
- int nreds = redp ? redp->nreds : 0;
- shifts *shiftp = state_table[state]->shifts;
- errs *errp = state_table[state]->errs;
+ 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;
- if (nreds >= 1)
+ if (redp->nreds >= 1)
{
int j;
/* loop over all the rules available here which require
lookahead */
- m = state_table[state]->lookaheadsp;
- n = state_table[state + 1]->lookaheadsp;
-
- for (i = n - 1; i >= m; i--)
+ 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 (i), j))
- actrow[j] = -LAruleno[i];
+ if (BITISSET (LA (state->lookaheadsp + i), j))
+ actrow[j] = -LAruleno[state->lookaheadsp + i];
}
/* Now see which tokens are allowed for shifts in this state. For
/* 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++)
- {
- int symbol = errp->errs[i];
- actrow[symbol] = MINSHORT;
- }
+ for (i = 0; i < errp->nerrs; i++)
+ {
+ 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 (state_table[state]->consistent)
+ if (state->consistent)
default_rule = redp->rules[0];
else
{
int max = 0;
- for (i = m; i < n; i++)
+ for (i = 0; i < state->nlookaheads; i++)
{
int count = 0;
- int rule = -LAruleno[i];
+ int rule = -LAruleno[state->lookaheadsp + i];
int j;
for (j = 0; j < ntokens; j++)
actrow = XCALLOC (short, ntokens);
for (i = 0; i < nstates; ++i)
{
- yydefact[i] = action_row (i);
+ yydefact[i] = action_row (state_table[i]);
save_row (i);
}
{
int rule;
for (rule = 1; rule < nrules + 1; ++rule)
- if (rule_table[rule].action)
+ if (rules[rule].action)
{
fprintf (out, " case %d:\n", rule);
if (!no_lines_flag)
fprintf (out, muscle_find ("linef"),
- rule_table[rule].action_line,
+ 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",
- rule_table[rule].action,
+ rules[rule].action,
yacc_flag ? ";" : "");
/* We always output 4 '\n' per action. */
if (!no_lines_flag)
++*line;
/* Get the number of lines written by the user. */
- *line += get_lines_number (rule_table[rule].action);
+ *line += get_lines_number (rules[rule].action);
+ }
+}
+
+
+/*----------------------------.
+| Output the guards to OOUT. |
+`----------------------------*/
+
+static void
+guards_output (FILE *out, size_t *line)
+{
+ 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].guard_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ fprintf (out, "{ %s; }\n break;\n\n",
+ rules[rule].guard);
+
+ /* We always output 4 '\n' per action. */
+ *line += 4;
+ /* Plus one if !no_lines_flag. */
+ if (!no_lines_flag)
+ ++*line;
+ /* Get the number of lines written by the user. */
+ *line += get_lines_number (rules[rule].guard);
}
}
for (i = 0; i < nstates; ++i)
{
- XFREE (state_table[i]->shifts);
+ free (state_table[i]->shifts);
XFREE (state_table[i]->reductions);
- XFREE (state_table[i]->errs);
+ free (state_table[i]->errs);
free (state_table[i]);
}
XFREE (state_table);
muscle_value = muscle_find (muscle_key);
if (!strcmp (muscle_key, "actions"))
actions_output (out, &output_line);
+ else if (!strcmp (muscle_key, "guards"))
+ guards_output (out, &output_line);
else if (!strcmp (muscle_key, "line"))
fprintf (out, "%d", output_line);
else if (!strcmp (muscle_key, "skeleton-line"))
{
fputs (muscle_value, out);
output_line += get_lines_number (muscle_value);
- }
+ }
else
{
fputs ("%%", out);
MUSCLE_INSERT_INT ("debug", debug_flag);
MUSCLE_INSERT_INT ("final", final_state);
MUSCLE_INSERT_INT ("maxtok", max_user_token_number);
- MUSCLE_INSERT_INT ("ntbase", ntokens);
MUSCLE_INSERT_INT ("error-verbose", error_verbose);
MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
for (i = ntokens; i < nsyms; i++)
/* don't make these for dummy nonterminals made by gensym. */
- if (*tags[i] != '@')
- fprintf (out, "# define\tNT%s\t%d\n", tags[i], i);
+ 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);
if (semantic_parser)
output_stos ();
output_rule_data ();
- XFREE (user_toknums);
output_actions ();
prepare ();
if (defines_flag)
header_output ();
- free (rule_table + 1);
- obstack_free (&muscle_obstack, 0);
- obstack_free (&format_obstack, 0);
- obstack_free (&action_obstack, 0);
+ 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