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hashwalk.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2007 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * Glenn Fowler
 * AT&T Research
 *
 * hash table library
 */

#include "hashlib.h"

/*
 * apply walker to each active bucket in the table
 */

int
hashwalk(Hash_table_t* tab, int flags, register int (*walker)(const char*, char*, void*), void* handle)
{
      register Hash_bucket_t* b;
      register int            v;
      Hash_position_t*  pos;

      if (!(pos = hashscan(tab, flags)))
            return(-1);
      v = 0;
      while (b = hashnext(pos))
            if ((v = (*walker)(hashname(b), (tab->flags & HASH_VALUE) ? b->value : (char*)b, handle)) < 0)
                  break;
      hashdone(pos);
      return(v);
}

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