size_t
ritem_longest_rhs (void)
{
int max = 0;
rule_number r;
for (r = 0; r < nrules; ++r)
{
int length = rule_rhs_length (&rules[r]);
if (length > max)
max = length;
}
return max;
}
static void
reduce_grammar_tables (void)
{
/* Report and flag useless productions. */
{
rule_number r;
for (r = 0; r < nrules; r++)
rules[r].useful = bitset_test (P, r);
grammar_rules_useless_report (_("rule useless in grammar"));
}
/* Map the nonterminals to their new index: useful first, useless
afterwards. Kept for later report. */
{
int useful = 0;
int useless = nrules - nuseless_productions;
rule *rules_sorted = xnmalloc (nrules, sizeof *rules_sorted);
rule_number r;
for (r = 0; r < nrules; ++r)
rules_sorted[rules[r].useful ? useful++ : useless++] = rules[r];
free (rules);
rules = rules_sorted;
/* Renumber the rules markers in RITEMS. */
for (r = 0; r < nrules; ++r)
{
item_number *rhsp = rules[r].rhs;
for (/* Nothing. */; *rhsp >= 0; ++rhsp)
/* Nothing. */;
*rhsp = rule_number_as_item_number (r);
rules[r].number = r;
}
nrules -= nuseless_productions;
}
/* Adjust NRITEMS. */
{
rule_number r;
int length;
for (r = nrules; r < nrules + nuseless_productions; ++r)
{
length = rule_rhs_length (&rules[r]);
nritems -= length + 1;
}
}
}
static void
prepare_rules (void)
{
unsigned int *rline = xnmalloc (nrules, sizeof *rline);
symbol_number *r1 = xnmalloc (nrules, sizeof *r1);
unsigned int *r2 = xnmalloc (nrules, sizeof *r2);
int *dprec = xnmalloc (nrules, sizeof *dprec);
int *merger = xnmalloc (nrules, sizeof *merger);
int *immediate = xnmalloc (nrules, sizeof *immediate);
rule_number r;
for (r = 0; r < nrules; ++r)
{
/* LHS of the rule R. */
r1[r] = rules[r].lhs->number;
/* Length of rule R's RHS. */
r2[r] = rule_rhs_length (&rules[r]);
/* Line where rule was defined. */
rline[r] = rules[r].location.start.line;
/* Dynamic precedence (GLR). */
dprec[r] = rules[r].dprec;
/* Merger-function index (GLR). */
merger[r] = rules[r].merger;
/* Immediate reduction flags (GLR). */
immediate[r] = rules[r].is_predicate;
}
muscle_insert_unsigned_int_table ("rline", rline, 0, 0, nrules);
muscle_insert_symbol_number_table ("r1", r1, 0, 0, nrules);
muscle_insert_unsigned_int_table ("r2", r2, 0, 0, nrules);
muscle_insert_int_table ("dprec", dprec, 0, 0, nrules);
muscle_insert_int_table ("merger", merger, 0, 0, nrules);
muscle_insert_int_table ("immediate", immediate, 0, 0, nrules);
MUSCLE_INSERT_INT ("rules_number", nrules);
MUSCLE_INSERT_INT ("max_left_semantic_context", max_left_semantic_context);
free (rline);
free (r1);
free (r2);
free (dprec);
free (merger);
free (immediate);
}