time_t printf()

[Max Laier]

On Sunday 08 January 2006 11:34, Edwin Groothuis wrote:
> Trying to printf() a time_t value, I tried the following permutations:
>
>     time_t days = 0, hours = 0, minutes = 0, seconds = 0;
>     sprintf(buffer, "%2d %2u %2ld %2lu", days, hours, minutes, seconds);
>
> 4.11 said:
>     misc.c:117: warning: int format, time_t arg (arg 3)
>     misc.c:117: warning: unsigned int format, long unsigned int arg (arg 4)
>
> 6.0 said:
>     misc.c:117: warning: long int format, time_t arg (arg 5)
>     misc.c:117: warning: long unsigned int format, time_t arg (arg 6)
>
> So between 4.11 and 6.0 there is no uniform way to printf() time_t
> values...

time_t is a bitch.  The safest way should be:
	"%lld", (long long int)foo
if you have C99 (not sure if that is given for 4.x):
	"%jd", (intmax_t)foo

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