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SCCS-file: difftime.c

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SCCS-SID: 7.15
This commit is contained in:
Arthur David Olson
2004-11-01 13:18:56 -05:00
committed by Paul Eggert
parent 8c04f99897
commit 7c8093ffb8
1 changed files with 8 additions and 5 deletions
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13
difftime.c
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@@ -19,15 +19,18 @@ difftime(time1, time0)
const time_t time1;
const time_t time0;
{
/*
** If (sizeof (double) > sizeof (time_t)) simply convert and subtract
** (assuming that the larger type has more precision).
** This is the common real-world case circa 2004.
*/
if (sizeof (double) > sizeof (time_t))
return (double) time1 - (double) time0;
if (!TYPE_INTEGRAL(time_t)) {
/*
** time_t is floating.
** Do the math in whichever of time_t or double is wider
** (assuming that the wider type has more precision).
*/
if (sizeof (time_t) >= sizeof (double))
return time1 - time0;
else return (double) time1 - (double) time0;
return time1 - time0;
}
if (!TYPE_SIGNED(time_t)) {
/*