105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/* Copyright (c) 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <string.h>
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#include <rpcsvc/nis.h>
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#include "nis_xdr.h"
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#include "nis_intern.h"
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fd_result *
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__nis_finddirectory (directory_obj *dir, const_nis_name name)
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{
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nis_error status;
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fd_args fd_args;
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fd_result *fd_res;
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fd_args.dir_name = (char *)name;
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fd_args.requester = nis_local_host();
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fd_res = calloc (1, sizeof (fd_result));
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if (fd_res == NULL)
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return NULL;
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status = __do_niscall2 (dir->do_servers.do_servers_val,
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dir->do_servers.do_servers_len,
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NIS_FINDDIRECTORY, (xdrproc_t) _xdr_fd_args,
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(caddr_t) &fd_args, (xdrproc_t) _xdr_fd_result,
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(caddr_t) fd_res, NO_AUTHINFO|USE_DGRAM, NULL);
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if (status != NIS_SUCCESS)
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fd_res->status = status;
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return fd_res;
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}
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/* This is from libc/db/hash/hash_func.c, hash3 is static there */
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/*
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* This is INCREDIBLY ugly, but fast. We break the string up into 8 byte
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* units. On the first time through the loop we get the "leftover bytes"
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* (strlen % 8). On every other iteration, we perform 8 HASHC's so we handle
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* all 8 bytes. Essentially, this saves us 7 cmp & branch instructions. If
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* this routine is heavily used enough, it's worth the ugly coding.
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*
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* OZ's original sdbm hash
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*/
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uint32_t
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__nis_hash (const void *keyarg, register size_t len)
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{
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register const u_char *key;
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register size_t loop;
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register uint32_t h;
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#define HASHC h = *key++ + 65599 * h
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h = 0;
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key = keyarg;
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if (len > 0)
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{
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loop = (len + 8 - 1) >> 3;
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switch (len & (8 - 1))
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{
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case 0:
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do {
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HASHC;
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/* FALLTHROUGH */
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case 7:
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HASHC;
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/* FALLTHROUGH */
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case 6:
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HASHC;
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/* FALLTHROUGH */
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case 5:
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HASHC;
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/* FALLTHROUGH */
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case 4:
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HASHC;
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/* FALLTHROUGH */
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case 3:
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HASHC;
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/* FALLTHROUGH */
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case 2:
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HASHC;
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/* FALLTHROUGH */
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case 1:
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HASHC;
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} while (--loop);
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}
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}
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return (h);
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}
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