ceph/src/seastar/dpdk/lib/librte_eal/common/include/rte_uuid.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (C) 1996, 1997, 1998 Theodore Ts'o.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, and the entire permission notice in its entirety,
   9  *    including the disclaimer of warranties.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote
  14  *    products derived from this software without specific prior
  15  *    written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
  20  * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE
  21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  23  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  24  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  27  * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
  28  * DAMAGE.
  29  */
  30 /**
  31  * @file
  32  *
  33  * UUID related functions originally from libuuid
  34  */
  35
  36 #ifndef _RTE_UUID_H_
  37 #define _RTE_UUID_H_
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #include <stdbool.h>
  44
  45 /**
  46  * Struct describing a Universal Unique Identifier
  47  */
  48 typedef unsigned char rte_uuid_t[16];
  49
  50 /**
  51  * Helper for defining UUID values for id tables.
  52  */
  53 #define RTE_UUID_INIT(a, b, c, d, e) {          \
  54         ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, \
  55         ((a) >> 8) & 0xff, (a) & 0xff,          \
  56         ((b) >> 8) & 0xff, (b) & 0xff,          \
  57         ((c) >> 8) & 0xff, (c) & 0xff,          \
  58         ((d) >> 8) & 0xff, (d) & 0xff,          \
  59         ((e) >> 40) & 0xff, ((e) >> 32) & 0xff, \
  60         ((e) >> 24) & 0xff, ((e) >> 16) & 0xff, \
  61         ((e) >> 8) & 0xff, (e) & 0xff           \
  62 }
  63
  64 /**
  65  * Test if UUID is all zeros.
  66  *
  67  * @param uu
  68  *    The uuid to check.
  69  * @return
  70  *    true if uuid is NULL value, false otherwise
  71  */
  72 bool rte_uuid_is_null(const rte_uuid_t uu);
  73
  74 /**
  75  * Copy uuid.
  76  *
  77  * @param dst
  78  *    Destination uuid
  79  * @param src
  80  *    Source uuid
  81  */
  82 static inline void rte_uuid_copy(rte_uuid_t dst, const rte_uuid_t src)
  83 {
  84         memcpy(dst, src, sizeof(rte_uuid_t));
  85 }
  86
  87 /**
  88  * Compare two UUID's
  89  *
  90  * @param a
  91  *    A UUID to compare
  92  * @param b
  93  *    A UUID to compare
  94  * @return
  95  *   returns an integer less than, equal to, or greater than zero if UUID a is
  96  *   is less than, equal, or greater than UUID b.
  97  */
  98 int     rte_uuid_compare(const rte_uuid_t a, const rte_uuid_t b);
  99
 100 /**
 101  * Extract UUID from string
 102  *
 103  * @param in
 104  *    Pointer to string of characters to convert
 105  * @param uu
 106  *    Destination UUID
 107  * @return
 108  *    Returns 0 on success, and -1 if string is not a valid UUID.
 109  */
 110 int     rte_uuid_parse(const char *in, rte_uuid_t uu);
 111
 112 /**
 113  * Convert UUID to string
 114  *
 115  * @param uu
 116  *    UUID to format
 117  * @param out
 118  *    Resulting string buffer
 119  * @param len
 120  *    Sizeof the available string buffer
 121  */
 122 #define RTE_UUID_STRLEN (36 + 1)
 123 void    rte_uuid_unparse(const rte_uuid_t uu, char *out, size_t len);
 124
 125 #ifdef __cplusplus
 126 }
 127 #endif
 128
 129 #endif /* RTE_UUID_H */