1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#ifndef UTIL_H_
#define UTIL_H_
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include "ds.h"
static char *va_sprintf(const char *fmt, va_list args) {
va_list args_copy;
va_copy(args_copy, args);
char fakebuf[2] = {0};
int ret = vsnprintf(fakebuf, 1, fmt, args_copy);
va_end(args_copy);
if (ret < 0) return NULL; // bad format or something
size_t n = (size_t)ret;
char *str = calloc(1, n + 1);
vsnprintf(str, n + 1, fmt, args);
return str;
}
static char *a_sprintf(PRINTF_FORMAT_STRING const char *fmt, ...) ATTRIBUTE_PRINTF(1, 2);
static char *a_sprintf(const char *fmt, ...) {
// idk if you can always just pass NULL to vsnprintf
va_list args;
va_start(args, fmt);
char *str = va_sprintf(fmt, args);
va_end(args);
return str;
}
static double get_time_double(void) {
struct timespec ts = {0};
clock_gettime(CLOCK_MONOTONIC, &ts);
return (double)ts.tv_sec + (double)ts.tv_nsec * 1e-9;
}
static uint8_t popcount64(uint64_t x) {
uint8_t cnt = 0;
while (x) {
x &= x - 1;
cnt++;
}
return cnt;
}
#endif
|
