146 lines
2.3 KiB
C
146 lines
2.3 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "util.h"
|
|
|
|
char *argv0;
|
|
|
|
static void
|
|
verr(const char *fmt, va_list ap)
|
|
{
|
|
if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
|
|
fprintf(stderr, "%s: ", argv0);
|
|
}
|
|
|
|
vfprintf(stderr, fmt, ap);
|
|
|
|
if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
|
|
fputc(' ', stderr);
|
|
perror(NULL);
|
|
} else {
|
|
fputc('\n', stderr);
|
|
}
|
|
}
|
|
|
|
void
|
|
warn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
die(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
evsnprintf(char *str, size_t size, const char *fmt, va_list ap)
|
|
{
|
|
int ret;
|
|
|
|
ret = vsnprintf(str, size, fmt, ap);
|
|
|
|
if (ret < 0) {
|
|
warn("vsnprintf:");
|
|
return -1;
|
|
} else if ((size_t)ret >= size) {
|
|
warn("vsnprintf: Output truncated");
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
esnprintf(char *str, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
ret = evsnprintf(str, size, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
const char *
|
|
bprintf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
ret = evsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
|
|
return (ret < 0) ? NULL : buf;
|
|
}
|
|
|
|
const char *
|
|
fmt_human(uint64_t num, int base)
|
|
{
|
|
double scaled;
|
|
size_t i, prefixlen;
|
|
const char **prefix;
|
|
const char *prefix_1000[] = { "", "k", "M", "G", "T", "P", "E", "Z", "Y" };
|
|
const char *prefix_1024[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei",
|
|
"Zi", "Yi" };
|
|
|
|
switch (base) {
|
|
case 1000:
|
|
prefix = prefix_1000;
|
|
prefixlen = LEN(prefix_1000);
|
|
break;
|
|
case 1024:
|
|
prefix = prefix_1024;
|
|
prefixlen = LEN(prefix_1024);
|
|
break;
|
|
default:
|
|
warn("fmt_human: Invalid base");
|
|
return NULL;
|
|
}
|
|
|
|
scaled = num;
|
|
for (i = 0; i < prefixlen && scaled >= base; i++) {
|
|
scaled /= base;
|
|
}
|
|
|
|
return bprintf("%.1f%s", scaled, prefix[i]);
|
|
}
|
|
|
|
int
|
|
pscanf(const char *path, const char *fmt, ...)
|
|
{
|
|
FILE *fp;
|
|
va_list ap;
|
|
int n;
|
|
|
|
if (!(fp = fopen(path, "r"))) {
|
|
warn("fopen '%s':", path);
|
|
return -1;
|
|
}
|
|
va_start(ap, fmt);
|
|
n = vfscanf(fp, fmt, ap);
|
|
va_end(ap);
|
|
fclose(fp);
|
|
|
|
return (n == EOF) ? -1 : n;
|
|
}
|