blob: 118dc35a9ca5edcd2fb014da39669e9fd5d882d1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
#include "proone_util.h"
void proone_rnd_alphanumeric_str (proone_rnd_engine_t *rnd_engine, char *str, const size_t len) {
static const char SET[] = "qwertyuiopasdfghjklzxcvbnm0123456789";
size_t i = 0;
uint32_t n;
if (len >= 4) {
for (; i < len / 4 * 4; i += 4) {
n = proone_rnd_gen_int(rnd_engine);
str[i + 0] = SET[((uint8_t*)&n)[0] % sizeof(SET)];
str[i + 1] = SET[((uint8_t*)&n)[1] % sizeof(SET)];
str[i + 2] = SET[((uint8_t*)&n)[2] % sizeof(SET)];
str[i + 3] = SET[((uint8_t*)&n)[3] % sizeof(SET)];
}
}
if (i < len) {
n = proone_rnd_gen_int(rnd_engine);
for (; i < len; i += 1) {
str[i] = SET[((uint8_t*)&n)[i % 4] % sizeof(SET)];
}
}
}
|
