X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e1a4f3a428d3b721b1a63cc0cb77369e8efe7ed8..0e16927b48c881317a38132923b6f3150802a7d3:/src/derives.c?ds=inline
diff --git a/src/derives.c b/src/derives.c
index 87b15f2d..ce5a6a5f 100644
--- a/src/derives.c
+++ b/src/derives.c
@@ -1,40 +1,41 @@
/* Match rules with nonterminals for bison,
- Copyright 1984, 1989, 2000, 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 1984, 1989, 2000-2003, 2005, 2009-2012 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
+ along with this program. If not, see . */
+#include
#include "system.h"
+
#include "getargs.h"
-#include "symtab.h"
-#include "types.h"
-#include "reader.h"
-#include "gram.h"
+
#include "derives.h"
+#include "gram.h"
+#include "reader.h"
+#include "symtab.h"
/* Linked list of rule numbers. */
-typedef struct rule_list_s
+typedef struct rule_list
{
- struct rule_list_s *next;
- rule_number_t value;
-} rule_list_t;
+ struct rule_list *next;
+ rule *value;
+} rule_list;
-rule_number_t **derives = NULL;
+rule ***derives;
static void
print_derives (void)
@@ -45,12 +46,12 @@ print_derives (void)
for (i = ntokens; i < nsyms; i++)
{
- rule_number_t *rp;
+ rule **rp;
fprintf (stderr, "\t%s derives\n", symbols[i]->tag);
- for (rp = derives[i]; *rp > 0; rp++)
+ for (rp = derives[i - ntokens]; *rp; ++rp)
{
- fprintf (stderr, "\t\t%3d ", *rp - 1);
- rule_rhs_print (&rules[*rp], stderr);
+ fprintf (stderr, "\t\t%3d ", (*rp)->user_number);
+ rule_rhs_print (*rp, stderr);
}
}
@@ -59,60 +60,60 @@ print_derives (void)
void
-set_derives (void)
+derives_compute (void)
{
- symbol_number_t i;
- rule_number_t r;
- rule_number_t *q;
+ symbol_number i;
+ rule_number r;
+ rule **q;
- /* DSET[NTERM] -- A linked list of the numbers of the rules whose
- LHS is NTERM. */
- rule_list_t **dset = XCALLOC (rule_list_t *, nvars) - ntokens;
+ /* DSET[NTERM - NTOKENS] -- A linked list of the numbers of the rules
+ whose LHS is NTERM. */
+ rule_list **dset = xcalloc (nvars, sizeof *dset);
/* DELTS[RULE] -- There are NRULES rule number to attach to nterms.
Instead of performing NRULES allocations for each, have an array
indexed by rule numbers. */
- rule_list_t *delts = XCALLOC (rule_list_t, nrules + 1);
+ rule_list *delts = xnmalloc (nrules, sizeof *delts);
- for (r = nrules; r > 0; r--)
+ for (r = nrules - 1; r >= 0; --r)
{
- symbol_number_t lhs = rules[r].lhs->number;
- rule_list_t *p = &delts[r];
+ symbol_number lhs = rules[r].lhs->number;
+ rule_list *p = &delts[r];
/* A new LHS is found. */
- p->next = dset[lhs];
- p->value = r;
- dset[lhs] = p;
+ p->next = dset[lhs - ntokens];
+ p->value = &rules[r];
+ dset[lhs - ntokens] = p;
}
/* DSET contains what we need under the form of a linked list. Make
it a single array. */
- derives = XCALLOC (rule_number_t *, nvars) - ntokens;
- q = XCALLOC (rule_number_t, nvars + int_of_rule_number (nrules));
+ derives = xnmalloc (nvars, sizeof *derives);
+ q = xnmalloc (nvars + nrules, sizeof *q);
for (i = ntokens; i < nsyms; i++)
{
- rule_list_t *p = dset[i];
- derives[i] = q;
+ rule_list *p = dset[i - ntokens];
+ derives[i - ntokens] = q;
while (p)
{
*q++ = p->value;
p = p->next;
}
- *q++ = -1;
+ *q++ = NULL;
}
- if (trace_flag)
+ if (trace_flag & trace_sets)
print_derives ();
- free (dset + ntokens);
+ free (dset);
free (delts);
}
void
-free_derives (void)
+derives_free (void)
{
- XFREE (derives[ntokens]);
- XFREE (derives + ntokens);
+ free (derives[0]);
+ free (derives);
}