Update.
[glibc.git] / nis / nis_util.c
blobf701672671e86906f3103909897ce9c6280f0481
1 /* Copyright (c) 1997, 1998, 1999 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <string.h>
21 #include <rpcsvc/nis.h>
23 #include "nis_xdr.h"
24 #include "nis_intern.h"
26 fd_result *
27 __nis_finddirectory (directory_obj *dir, const_nis_name name)
29 nis_error status;
30 fd_args fd_args;
31 fd_result *fd_res;
33 fd_args.dir_name = (char *)name;
34 fd_args.requester = nis_local_host();
35 fd_res = calloc (1, sizeof (fd_result));
36 if (fd_res == NULL)
37 return NULL;
39 status = __do_niscall2 (dir->do_servers.do_servers_val,
40 dir->do_servers.do_servers_len,
41 NIS_FINDDIRECTORY, (xdrproc_t) _xdr_fd_args,
42 (caddr_t) &fd_args, (xdrproc_t) _xdr_fd_result,
43 (caddr_t) fd_res, NO_AUTHINFO|USE_DGRAM, NULL);
44 if (status != NIS_SUCCESS)
45 fd_res->status = status;
47 return fd_res;
50 /* This is from libc/db/hash/hash_func.c, hash3 is static there */
52 * This is INCREDIBLY ugly, but fast. We break the string up into 8 byte
53 * units. On the first time through the loop we get the "leftover bytes"
54 * (strlen % 8). On every other iteration, we perform 8 HASHC's so we handle
55 * all 8 bytes. Essentially, this saves us 7 cmp & branch instructions. If
56 * this routine is heavily used enough, it's worth the ugly coding.
58 * OZ's original sdbm hash
60 uint32_t
61 __nis_hash (const void *keyarg, register size_t len)
63 register const u_char *key;
64 register size_t loop;
65 register uint32_t h;
67 #define HASHC h = *key++ + 65599 * h
69 h = 0;
70 key = keyarg;
71 if (len > 0)
73 loop = (len + 8 - 1) >> 3;
74 switch (len & (8 - 1))
76 case 0:
77 do {
78 HASHC;
79 /* FALLTHROUGH */
80 case 7:
81 HASHC;
82 /* FALLTHROUGH */
83 case 6:
84 HASHC;
85 /* FALLTHROUGH */
86 case 5:
87 HASHC;
88 /* FALLTHROUGH */
89 case 4:
90 HASHC;
91 /* FALLTHROUGH */
92 case 3:
93 HASHC;
94 /* FALLTHROUGH */
95 case 2:
96 HASHC;
97 /* FALLTHROUGH */
98 case 1:
99 HASHC;
100 } while (--loop);
103 return (h);