gas/hash.c

/* hash.c -- gas hash table code
   Copyright (C) 1987-2023 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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 3, or (at your option)
   any later version.

   GAS 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 GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#include "as.h"

/* Hash function for a string_tuple.  */

hashval_t
hash_string_tuple (const void *e)
{
  string_tuple_t *tuple = (string_tuple_t *) e;
  return htab_hash_string (tuple->key);
}

/* Equality function for a string_tuple.  */

int
eq_string_tuple (const void *a, const void *b)
{
  const string_tuple_t *ea = (const string_tuple_t *) a;
  const string_tuple_t *eb = (const string_tuple_t *) b;

  return strcmp (ea->key, eb->key) == 0;
}

/* Insert ELEMENT into HTAB.  If REPLACE is non-zero existing elements
   are overwritten.  If ELEMENT already exists, a pointer to the slot
   is returned.  Otherwise NULL is returned.  */

void **
htab_insert (htab_t htab, void *element, int replace)
{
  void **slot = htab_find_slot (htab, element, INSERT);
  if (*slot != NULL)
    {
      if (replace)
	{
	  if (htab->del_f)
	    (*htab->del_f) (*slot);
	  *slot = element;
	}
      return slot;
    }
  *slot = element;
  return NULL;
}

/* Print statistics about a hash table.  */

void
htab_print_statistics (FILE *f, const char *name, htab_t table)
{
  fprintf (f, "%s hash statistics:\n", name);
  fprintf (f, "\t%u searches\n", table->searches);
  fprintf (f, "\t%u collisions\n", table->collisions);
  fprintf (f, "\t%lu elements\n", (unsigned long) htab_elements (table));
  fprintf (f, "\t%lu table size\n", (unsigned long) htab_size (table));
}