1 // Copyright 2007 Google LLC
2 //
3 // Redistribution and use in source and binary forms, with or without
4 // modification, are permitted provided that the following conditions are
5 // met:
6 //
7 // * Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above
10 // copyright notice, this list of conditions and the following disclaimer
11 // in the documentation and/or other materials provided with the
12 // distribution.
13 // * Neither the name of Google LLC nor the names of its
14 // contributors may be used to endorse or promote products derived from
15 // this software without specific prior written permission.
16 //
17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29 // Author: Alfred Peng
30
31 #ifdef HAVE_CONFIG_H
32 #include <config.h> // Must come first
33 #endif
34
35 #include <cassert>
36 #include <ctime>
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <unistd.h>
41
42 #include "common/solaris/guid_creator.h"
43
44 //
45 // GUIDGenerator
46 //
47 // This class is used to generate random GUID.
48 // Currently use random number to generate a GUID. This should be OK since
49 // we don't expect crash to happen very offen.
50 //
51 class GUIDGenerator {
52 public:
GUIDGenerator()53 GUIDGenerator() {
54 srandom(time(NULL));
55 }
56
CreateGUID(GUID * guid) const57 bool CreateGUID(GUID *guid) const {
58 guid->data1 = random();
59 guid->data2 = (uint16_t)(random());
60 guid->data3 = (uint16_t)(random());
61 *reinterpret_cast<uint32_t*>(&guid->data4[0]) = random();
62 *reinterpret_cast<uint32_t*>(&guid->data4[4]) = random();
63 return true;
64 }
65 };
66
67 // Guid generator.
68 const GUIDGenerator kGuidGenerator;
69
CreateGUID(GUID * guid)70 bool CreateGUID(GUID *guid) {
71 return kGuidGenerator.CreateGUID(guid);
72 }
73
74 // Parse guid to string.
GUIDToString(const GUID * guid,char * buf,int buf_len)75 bool GUIDToString(const GUID *guid, char *buf, int buf_len) {
76 // Should allow more space the the max length of GUID.
77 assert(buf_len > kGUIDStringLength);
78 int num = snprintf(buf, buf_len, kGUIDFormatString,
79 guid->data1, guid->data2, guid->data3,
80 *reinterpret_cast<const uint32_t*>(&(guid->data4[0])),
81 *reinterpret_cast<const uint32_t*>(&(guid->data4[4])));
82 if (num != kGUIDStringLength)
83 return false;
84
85 buf[num] = '\0';
86 return true;
87 }
88