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Member "bonnie++-2.00a/rand.cpp" (3 Jul 2009, 1055 Bytes) of package /linux/privat/bonnie++-2.00a.tgz:
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1 #include "rand.h"
2 #include <unistd.h>
3 #include <netinet/in.h>
4 #include <sys/types.h>
5 #include <sys/stat.h>
6 #include <fcntl.h>
7
8 bool Rand::seedFile(CPCCHAR name)
9 {
10 int fd = file_open(name, O_RDONLY);
11 struct stat buf;
12 if(fd == -1 || fstat(fd, &buf) == -1)
13 {
14 fprintf(stderr, "Can't open random file \"%s\".\n", name);
15 if(fd != -1)
16 close(fd);
17 return true;
18 }
19 int size = buf.st_size / sizeof(int);
20 delete(m_arr);
21 m_arr = new int[size];
22 m_size = size;
23 if(size_t(read(fd, m_arr, size * sizeof(int))) != size * sizeof(int))
24 {
25 fprintf(stderr, "Can't read random data from \"%s\".\n", name);
26 return true;
27 }
28 for(int i = 0; i < size; i++)
29 {
30 m_arr[i] = abs(int(ntohl(m_arr[i])));
31 }
32 close(fd);
33 m_ind = -1;
34 m_name = string(name);
35 return false;
36 }
37
38 void Rand::seedNum(UINT num)
39 {
40 delete(m_arr);
41 m_arr = NULL;
42 m_size = 0;
43 srand(num);
44 m_init = num;
45 char buf[12];
46 sprintf(buf, "%u", num);
47 m_name = string(buf);
48 }
49
50 void Rand::reset()
51 {
52 if(m_arr)
53 m_ind = -1;
54 else
55 srand(m_init);
56 }