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[svn] Handle years after 2099.

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hniksic 2005-07-05 11:18:15 -07:00
parent cee40cc718
commit cf67080e5e
2 changed files with 17 additions and 9 deletions
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4
src/ChangeLog
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@ -1,3 +1,7 @@
2005-07-05 Hrvoje Niksic <hniksic@xemacs.org>
* cmpt.c (timegm): Handle years after 2099.
2005-07-05 Hrvoje Niksic <hniksic@xemacs.org> 2005-07-05 Hrvoje Niksic <hniksic@xemacs.org>
* cmpt.c (timegm): Remove unused variable. * cmpt.c (timegm): Remove unused variable.

22
src/cmpt.c
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@ -1230,8 +1230,12 @@ fnmatch (const char *pattern, const char *string, int flags)
returns the number of seconds since 1970-01-01, converted to returns the number of seconds since 1970-01-01, converted to
time_t. */ time_t. */
#define IS_LEAP(year) \ #define IS_LEAP(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
/* Number of leap years in the range [y1, y2). */
#define LEAPDAYS(y1, y2) \
((y2-1)/4 - (y1-1)/4) - ((y2-1)/100 - (y1-1)/100) + ((y2-1)/400 - (y1-1)/400)
time_t time_t
timegm (struct tm *t) timegm (struct tm *t)
@ -1240,20 +1244,20 @@ timegm (struct tm *t)
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }, { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 },
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 } { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }
}; };
const int year = 1900 + t->tm_year;
unsigned long secs; unsigned long secs;
int days; int days;
/* Only handles years between 1970 and 2099. */ if (year < 1970)
if (t->tm_year < 70 || t->tm_year > 129)
return (time_t) -1; return (time_t) -1;
days = 365 * (t->tm_year - 70); days = 365 * (year - 1970);
/* Take into account leap years between 1970 and t->tm_year-1; all /* Take into account leap years between 1970 and YEAR, not counting
years divisible by four between 1968 and 2100 should be leap. */ YEAR itself. */
days += (t->tm_year - 1 - 68) / 4; days += LEAPDAYS (1970, year);
if (t->tm_mon < 0 || t->tm_mon >= 12) if (t->tm_mon < 0 || t->tm_mon >= 12)
return (time_t) -1; return (time_t) -1;
days += month_to_days[IS_LEAP (1900 + t->tm_year)][t->tm_mon]; days += month_to_days[IS_LEAP (year)][t->tm_mon];
days += t->tm_mday - 1; days += t->tm_mday - 1;
secs = days * 86400 + t->tm_hour * 3600 + t->tm_min * 60 + t->tm_sec; secs = days * 86400 + t->tm_hour * 3600 + t->tm_min * 60 + t->tm_sec;