source: trunk/essentials/dev-lang/perl/x2p/hash.c@ 3210

/*    hash.c
 *
 *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001, 2002,
 *    2005 by Larry Wall and others
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 */

#include <stdio.h>
#include "EXTERN.h"
#include "a2p.h"
#include "util.h"

#ifdef NETWARE
char *savestr(char *str);
#endif

STR *
hfetch(register HASH *tb, char *key)
{
    register char *s;
    register int i;
    register int hash;
    register HENT *entry;

    if (!tb)
        return Nullstr;
    for (s=key,         i=0,    hash = 0;
      /* while */ *s;
         s++,           i++,    hash *= 5) {
        hash += *s * coeff[i];
    }
    entry = tb->tbl_array[hash & tb->tbl_max];
    for (; entry; entry = entry->hent_next) {
        if (entry->hent_hash != hash)           /* strings can't be equal */
            continue;
        if (strNE(entry->hent_key,key)) /* is this it? */
            continue;
        return entry->hent_val;
    }
    return Nullstr;
}

bool
hstore(register HASH *tb, char *key, STR *val)
{
    register char *s;
    register int i;
    register int hash;
    register HENT *entry;
    register HENT **oentry;

    if (!tb)
        return FALSE;
    for (s=key,         i=0,    hash = 0;
      /* while */ *s;
         s++,           i++,    hash *= 5) {
        hash += *s * coeff[i];
    }

    oentry = &(tb->tbl_array[hash & tb->tbl_max]);
    i = 1;

    for (entry = *oentry; entry; i=0, entry = entry->hent_next) {
        if (entry->hent_hash != hash)           /* strings can't be equal */
            continue;