src/hash.h

   1 /*
   2  * Copyright 1993, 1995 Christopher Seiwald.
   3  * This file is part of Jam - see jam.c for Copyright information.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, version 3 of the License ONLY.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 /*
  18  * hash.h - simple in-memory hashing routines
  19  */
  20 #ifndef JAMH_HASH_H
  21 #define JAMH_HASH_H
  22
  23
  24 typedef struct hashdata HASHDATA;
  25
  26 extern struct hash *hashinit (int datalen, const char *name);
  27 extern int hashitem (struct hash *hp, HASHDATA **data, int enter);
  28 extern void hashdone (struct hash *hp);
  29
  30 /* return !0 from itercb() to stop; returns result of itercb() */
  31 typedef int (*hash_iterator_cb) (const void *hdata, void *udata);
  32 extern int hashiterate (struct hash *hp, hash_iterator_cb itercb, void *udata);
  33
  34 static inline int hashenter (struct hash *hp, HASHDATA **data) { return !hashitem(hp, data, !0); }
  35 static inline int hashcheck (struct hash *hp, HASHDATA **data) { return hashitem(hp, data, 0); }
  36
  37
  38 #endif