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* src/derives.h: New file.

Browse Source 
* src/main.c, src/derives.h: Use it.
Formatting changes.
* src/Makefile.am (noinst_HEADERS): Adjust.
This commit is contained in:
Akim Demaille
2000-09-20 13:14:11 +00:00
parent db5b3a89b4
commit cc84fd5dc7
12 changed files with 158 additions and 133 deletions
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110
src/derives.c
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@@ -1,40 +1,59 @@
/* Match rules with nonterminals for bison,
Copyright (C) 1984, 1989 Free Software Foundation, Inc.
Copyright (C) 1984, 1989, 2000 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
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 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.
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. */
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. */
/* set_derives finds, for each variable (nonterminal), which rules can derive it.
It sets up the value of derives so that
derives[i - ntokens] points to a vector of rule numbers,
terminated with -1. */
/* set_derives finds, for each variable (nonterminal), which rules can
derive it. It sets up the value of derives so that derives[i -
ntokens] points to a vector of rule numbers, terminated with -1.
*/
#include "system.h"
#include "alloc.h"
#include "types.h"
#include "gram.h"
extern void set_derives PARAMS((void));
extern void free_derives PARAMS((void));
#include "derives.h"
#if DEBUG
static void print_derives PARAMS((void));
extern char **tags;
static void
print_derives (void)
{
register int i;
register short *sp;
printf (_("\n\n\nDERIVES\n\n"));
for (i = ntokens; i < nsyms; i++)
{
printf (_("%s derives"), tags[i]);
for (sp = derives[i]; *sp > 0; sp++)
{
printf (" %d", *sp);
}
putchar ('\n');
}
putchar ('\n');
}
#endif
short **derives;
@@ -49,8 +68,8 @@ set_derives (void)
register shorts **dset;
register shorts *delts;
dset = NEW2(nvars, shorts *) - ntokens;
delts = NEW2(nrules + 1, shorts);
dset = NEW2 (nvars, shorts *) - ntokens;
delts = NEW2 (nrules + 1, shorts);
p = delts;
for (i = nrules; i > 0; i--)
@@ -65,8 +84,8 @@ set_derives (void)
}
}
derives = NEW2(nvars, short *) - ntokens;
q = NEW2(nvars + nrules, short);
derives = NEW2 (nvars, short *) - ntokens;
q = NEW2 (nvars + nrules, short);
for (i = ntokens; i < nsyms; i++)
{
@@ -80,44 +99,17 @@ set_derives (void)
*q++ = -1;
}
#ifdef DEBUG
print_derives();
#if DEBUG
print_derives ();
#endif
FREE(dset + ntokens);
FREE(delts);
FREE (dset + ntokens);
FREE (delts);
}
void
free_derives (void)
{
FREE(derives[ntokens]);
FREE(derives + ntokens);
FREE (derives[ntokens]);
FREE (derives + ntokens);
}
#ifdef DEBUG
static void
print_derives (void)
{
register int i;
register short *sp;
printf(_("\n\n\nDERIVES\n\n"));
for (i = ntokens; i < nsyms; i++)
{
printf(_("%s derives"), tags[i]);
for (sp = derives[i]; *sp > 0; sp++)
{
printf(" %d", *sp);
}
putchar('\n');
}
putchar('\n');
}
#endif