/thirdparty/breakpad/common/solaris/guid_creator.cc

 1// Copyright (c) 2007, Google Inc.
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29
30// Author: Alfred Peng
31
32#include <cassert>
33#include <ctime>
34
35#include <stdio.h>
36#include <stdlib.h>
37#include <unistd.h>
38
39#include "common/solaris/guid_creator.h"
40
41//
42// GUIDGenerator
43//
44// This class is used to generate random GUID.
45// Currently use random number to generate a GUID. This should be OK since
46// we don't expect crash to happen very offen.
47//
48class GUIDGenerator {
49 public:
50  GUIDGenerator() {
51    srandom(time(NULL));
52  }
53
54  bool CreateGUID(GUID *guid) const {
55    guid->data1 = random();
56    guid->data2 = (u_int16_t)(random());
57    guid->data3 = (u_int16_t)(random());
58    *reinterpret_cast<u_int32_t*>(&guid->data4[0]) = random();
59    *reinterpret_cast<u_int32_t*>(&guid->data4[4]) = random();
60    return true;
61  }
62};
63
64// Guid generator.
65const GUIDGenerator kGuidGenerator;
66
67bool CreateGUID(GUID *guid) {
68  return kGuidGenerator.CreateGUID(guid);
69};
70
71// Parse guid to string.
72bool GUIDToString(const GUID *guid, char *buf, int buf_len) {
73  // Should allow more space the the max length of GUID.
74  assert(buf_len > kGUIDStringLength);
75  int num = snprintf(buf, buf_len, kGUIDFormatString,
76                     guid->data1, guid->data2, guid->data3,
77                     *reinterpret_cast<const u_int32_t *>(&(guid->data4[0])),
78                     *reinterpret_cast<const u_int32_t *>(&(guid->data4[4])));
79  if (num != kGUIDStringLength)
80    return false;
81
82  buf[num] = '\0';
83  return true;
84}