11e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* 21e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o * isnull.c --- Check whether or not the UUID is null 3efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Copyright (C) 1996, 1997 Theodore Ts'o. 519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %Begin-Header% 71bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * Redistribution and use in source and binary forms, with or without 81bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * modification, are permitted provided that the following conditions 91bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * are met: 101bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * 1. Redistributions of source code must retain the above copyright 111bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * notice, and the entire permission notice in its entirety, 121bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * including the disclaimer of warranties. 131bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * 2. Redistributions in binary form must reproduce the above copyright 141bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * notice, this list of conditions and the following disclaimer in the 151bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * documentation and/or other materials provided with the distribution. 161bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * 3. The name of the author may not be used to endorse or promote 171bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * products derived from this software without specific prior 181bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * written permission. 19efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 201bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 211bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 221bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF 231bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE 241bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 251bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 261bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 271bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 281bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 291bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 301bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH 311bbfec624c4bbe767060a13762aa9a656536a4fdTheodore Ts'o * DAMAGE. 3219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %End-Header% 331e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o */ 341e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 351e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o#include "uuidP.h" 361e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 371e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o/* Returns 1 if the uuid is the NULL uuid */ 38ce2722f86de298ad1a8965f55a453b5723d2b2b9Theodore Ts'oint uuid_is_null(const uuid_t uu) 391e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o{ 40ce2722f86de298ad1a8965f55a453b5723d2b2b9Theodore Ts'o const unsigned char *cp; 41ce2722f86de298ad1a8965f55a453b5723d2b2b9Theodore Ts'o int i; 421e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 431e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o for (i=0, cp = uu; i < 16; i++) 441e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o if (*cp++) 451e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 0; 461e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o return 1; 471e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o} 481e3472c5f37ca3686dd69b079d4d02a302f5798dTheodore Ts'o 49