diff options
| -rw-r--r-- | bin/when.y | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/bin/when.y b/bin/when.y index a9f6d1ed..64859da7 100644 --- a/bin/when.y +++ b/bin/when.y @@ -103,6 +103,15 @@ static struct tm dateSub(struct tm date, struct tm scalar) { } static struct tm dateDiff(struct tm a, struct tm b) { + time_t atime = timegm(&a), btime = timegm(&b); + if (atime < btime) { + struct tm x = a; + a = b; + b = x; + time_t xtime = atime; + atime = btime; + btime = xtime; + } struct tm diff = { .tm_year = a.tm_year - b.tm_year, .tm_mon = a.tm_mon - b.tm_mon, @@ -117,7 +126,6 @@ static struct tm dateDiff(struct tm a, struct tm b) { diff.tm_mday = 0; while (dateAdd(b, diff).tm_mday != a.tm_mday) diff.tm_mday++; } - time_t atime = timegm(&a), btime = timegm(&b); diff.tm_yday = (atime - btime) / 24 / 60 / 60; return diff; } |