blob: 28e6cdbb87541503f293506a1aac7631cc2fcadf (
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
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
Convert external TAI64N timestamps to fractional seconds since epoch.
Written by Russ Allbery <rra@stanford.edu>
This work is in the public domain.
Usage:
tai64nfrac < input > output
Expects the input stream to be a sequence of lines beginning with @, a
timestamp in external TAI64N format, and a space. Replaces the @ and the
timestamp with fractional seconds since epoch (1970-01-01 00:00:00 UTC).
The input time format is the format written by tai64n and multilog. The
output time format is expected by qmailanalog. */
#include <stdio.h>
/* Read a TAI64N external format timestamp from stdin and write fractional
seconds since epoch (TAI, not UTC) to stdout. Return the character after
the timestamp. */
int decode(void)
{
int c;
unsigned long u;
unsigned long seconds = 0;
unsigned long nanoseconds = 0;
while ((c = getchar()) != EOF)
{
u = c - '0';
if (u >= 10)
{
u = c - 'a';
if (u >= 6) break;
u += 10;
}
seconds <<= 4;
seconds += nanoseconds >> 28;
nanoseconds &= 0xfffffff;
nanoseconds <<= 4;
nanoseconds += u;
}
seconds -= 4611686018427387914ULL;
printf("%lu.%lu ", seconds, nanoseconds);
return c;
}
int main(void)
{
int c;
unsigned long seconds;
unsigned long nanoseconds;
while ((c = getchar()) != EOF)
{
if (c == '@') c = decode();
while (c != EOF)
{
putchar(c);
if (c == '\n') break;
c = getchar();
}
}
}
|
GitWeb
