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* src/symtab.c (symbol_free): Remove dead deactivated code:

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type_name are properly removed.
Don't use XFREE to free items that cannot be NULL.
* src/struniq.h, src/struniq.c: New.
* src/main.c (main): Initialize/free struniqs.
* src/parse-gram.y (%union): Add astruniq member.
(yyprint): Adjust.
* src/scan-gram.l (<{tag}>): Return a struniq.
Free the obstack bit that used to store it.
* src/symtab.h (symbol_t): The 'type_name' member is a struniq.
This commit is contained in:
Akim Demaille
2002-11-12 07:55:55 +00:00
parent ccdb39e0a6
commit 3e6656f9ab
12 changed files with 304 additions and 103 deletions
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134
src/struniq.c Normal file
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/* Keeping a unique copy of strings.
Copyright (C) 2002 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 "quotearg.h"
#include "hash.h"
#include "struniq.h"
/*-----------------------.
| A struniq hash table. |
`-----------------------*/
/* Initial capacity of struniq hash table. */
#define HT_INITIAL_CAPACITY 257
static struct hash_table *struniqs_table = NULL;
/*-------------------------------------.
| Create the struniq for S if needed. |
`-------------------------------------*/
const struniq_t
struniq_new (const char *s)
{
/* Keep the struniqs in a printable form. */
struniq_t res = hash_lookup (struniqs_table,
quotearg_style (escape_quoting_style, s));
if (!res)
{
/* First insertion in the hash. */
res = xstrdup (quotearg_style (escape_quoting_style, s));
hash_insert (struniqs_table, res);
}
return res;
}
/*--------------------.
| Print the struniq. |
`--------------------*/
static bool
struniq_print (const struniq_t s)
{
fprintf (stderr, "%s\n", s);
return true;
}
/*-----------------------.
| A struniq hash table. |
`-----------------------*/
static bool
hash_compare_struniq_t (const struniq_t m1, const struniq_t m2)
{
return strcmp (m1, m2) == 0;
}
static unsigned int
hash_struniq_t (const struniq_t m, unsigned int tablesize)
{
return hash_string (m, tablesize);
}
/* A function to apply to each symbol. */
typedef bool (*struniq_processor_t) (const struniq_t);
/*----------------------------.
| Create the struniqs table. |
`----------------------------*/
void
struniqs_new (void)
{
struniqs_table = hash_initialize (HT_INITIAL_CAPACITY,
NULL,
(Hash_hasher) hash_struniq_t,
(Hash_comparator) hash_compare_struniq_t,
(Hash_data_freer) free);
}
/*-------------------------------------.
| Perform a task on all the struniqs. |
`-------------------------------------*/
static void
struniqs_do (struniq_processor_t processor, void *processor_data)
{
hash_do_for_each (struniqs_table,
(Hash_processor) processor,
processor_data);
}
/*-----------------.
| Print them all. |
`-----------------*/
void
struniqs_print (void)
{
struniqs_do (struniq_print, NULL);
}
/*--------------------.
| Free the struniqs. |
`--------------------*/
void
struniqs_free (void)
{
hash_free (struniqs_table);
}