2
* isnull.c --- Check whether or not the UUID is null
4
* Copyright (C) 1996, 1997 Theodore Ts'o.
7
* Redistribution and use in source and binary forms, with or without
8
* modification, are permitted provided that the following conditions
10
* 1. Redistributions of source code must retain the above copyright
11
* notice, and the entire permission notice in its entirety,
12
* including the disclaimer of warranties.
13
* 2. Redistributions in binary form must reproduce the above copyright
14
* notice, this list of conditions and the following disclaimer in the
15
* documentation and/or other materials provided with the distribution.
16
* 3. The name of the author may not be used to endorse or promote
17
* products derived from this software without specific prior
20
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
23
* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
24
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
27
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
30
* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
37
/* Returns 1 if the uuid is the NULL uuid */
38
int uuid_is_null(const uuid_t uu)
40
const unsigned char *cp;
43
for (i=0, cp = uu; i < 16; i++)