mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-11 05:13:04 +00:00
5fbb0954b8
* src/gram.h (token_number_as_item_number) (item_number_as_token_number): New. * src/output.c (GENERATE_OUTPUT_TABLE): New. Use it to create output_item_number_table and output_token_number_table. * src/LR0.c, src/derives.c, src/gram.c, src/gram.h, src/lalr.c, * src/lex.c, src/nullable.c, src/output.c, src/print.c, * src/print_graph.c, src/reader.c, src/reduce.c, src/state.h, * src/symtab.c, src/symtab.h: Use token_number_t instead of shorts.
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* Match rules with nonterminals for bison,
|
|
Copyright 1984, 1989, 2000, 2001 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
|
|
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.
|
|
|
|
Bison 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. */
|
|
|
|
|
|
#include "system.h"
|
|
#include "getargs.h"
|
|
#include "symtab.h"
|
|
#include "types.h"
|
|
#include "reader.h"
|
|
#include "gram.h"
|
|
#include "derives.h"
|
|
|
|
short **derives = NULL;
|
|
|
|
static void
|
|
print_derives (void)
|
|
{
|
|
int i;
|
|
|
|
fputs ("DERIVES\n", stderr);
|
|
|
|
for (i = ntokens; i < nsyms; i++)
|
|
{
|
|
short *sp;
|
|
fprintf (stderr, "\t%s derives\n", symbols[i]->tag);
|
|
for (sp = derives[i]; *sp > 0; sp++)
|
|
{
|
|
item_number_t *rhsp;
|
|
fprintf (stderr, "\t\t%d:", *sp);
|
|
for (rhsp = rules[*sp].rhs; *rhsp >= 0; ++rhsp)
|
|
fprintf (stderr, " %s", symbols[*rhsp]->tag);
|
|
fprintf (stderr, " (rule %d)\n", -*rhsp - 1);
|
|
}
|
|
}
|
|
|
|
fputs ("\n\n", stderr);
|
|
}
|
|
|
|
|
|
void
|
|
set_derives (void)
|
|
{
|
|
int i;
|
|
shorts *p;
|
|
short *q;
|
|
shorts **dset;
|
|
shorts *delts;
|
|
|
|
dset = XCALLOC (shorts *, nvars) - ntokens;
|
|
delts = XCALLOC (shorts, nrules + 1);
|
|
|
|
p = delts;
|
|
for (i = nrules; i > 0; i--)
|
|
{
|
|
token_number_t lhs = rules[i].lhs->number;
|
|
p->next = dset[lhs];
|
|
p->value = i;
|
|
dset[lhs] = p;
|
|
p++;
|
|
}
|
|
|
|
derives = XCALLOC (short *, nvars) - ntokens;
|
|
q = XCALLOC (short, nvars + nrules);
|
|
|
|
for (i = ntokens; i < nsyms; i++)
|
|
{
|
|
derives[i] = q;
|
|
p = dset[i];
|
|
while (p)
|
|
{
|
|
*q++ = p->value;
|
|
p = p->next;
|
|
}
|
|
*q++ = -1;
|
|
}
|
|
|
|
if (trace_flag)
|
|
print_derives ();
|
|
|
|
XFREE (dset + ntokens);
|
|
XFREE (delts);
|
|
}
|
|
|
|
void
|
|
free_derives (void)
|
|
{
|
|
XFREE (derives[ntokens]);
|
|
XFREE (derives + ntokens);
|
|
}
|