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/* This file is part of the Project Athena Zephyr Notification System.
* It contains functions for general use within the Zephyr server.
*
* Created by: John T. Kohl
*
* $Source$
* $Author$
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#ifndef lint
#ifndef SABER
static char rcsid_common_c[] =
"$Id$";
#endif /* SABER */
#endif /* lint */
#include <zephyr/zephyr.h>
#include <stdio.h>
#include <ctype.h>
#include <syslog.h>
#include <string.h>
#include "unix.h"
/* common routines for the server */
/* copy the string into newly allocated area */
char *
strsave (Zconst char *sp)
{
register char *ret;
if((ret = (char *) xmalloc((unsigned) strlen(sp)+1)) == NULL) {
syslog(LOG_ERR, "no mem strdup'ing");
abort();
}
(void) strcpy(ret,sp);
return(ret);
}
/* generic string hash function */
unsigned long
hash (Zconst char *string)
{
register unsigned long hval = 0;
register char cp;
while (1) {
cp = *string++;
if (!cp)
break;
hval += cp;
cp = *string++;
if (!cp)
break;
hval += cp * (3 + (1 << 16));
cp = *string++;
if (!cp)
break;
hval += cp * (1 + (1 << 8));
cp = *string++;
if (!cp)
break;
hval += cp * (1 + (1 << 12));
cp = *string++;
if (!cp)
break;
hval += cp * (1 + (1 << 4));
hval += ((long) hval) >> 18;
}
hval &= 0x7fffffff;
return hval;
}
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