gnu/usr.bin/as/hash.h

/* hash.h - for hash.c
   Copyright (C) 1987 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef hashH
#define hashH

struct hash_entry
{
  char *      hash_string;      /* points to where the symbol string is */
                                /* NULL means slot is not used */
                                /* DELETED means slot was deleted */
  char *      hash_value;       /* user's datum, associated with symbol */
};


#define HASH_STATLENGTH (6)
struct hash_control
{
  struct hash_entry * hash_where; /* address of hash table */
  int         hash_sizelog;     /* Log of ( hash_mask + 1 ) */
  int         hash_mask;        /* masks a hash into index into table */
  int         hash_full;        /* when hash_stat[STAT_USED] exceeds this, */
                                /* grow table */
  struct hash_entry * hash_wall; /* point just after last (usable) entry */
                                /* here we have some statistics */
  int hash_stat[HASH_STATLENGTH]; /* lies & statistics */
                                /* we need STAT_USED & STAT_SIZE */
};


/*                                              returns           */
struct hash_control *   hash_new();     /* [control block]        */
void                    hash_die();
void                    hash_say();
char *                  hash_delete();  /* previous value         */
char *                  hash_relpace(); /* previous value         */
char *                  hash_insert();  /* error string           */
char *                  hash_apply();   /* 0 means OK             */
char *                  hash_find();    /* value                  */
char *                  hash_jam();     /* error text (internal)  */
#endif                          /* #ifdef hashH */

/* end: hash.c */