;# $time = timelocal($sec,$min,$hours,$mday,$mon,$year);
;# $time = timegm($sec,$min,$hours,$mday,$mon,$year);
-;# These routines are quite efficient and yet are always guaranteed to agree
-;# with localtime() and gmtime(). We manage this by caching the start times
-;# of any months we've seen before. If we know the start time of the month,
-;# we can always calculate any time within the month. The start times
-;# themselves are guessed by successive approximation starting at the
-;# current time, since most dates seen in practice are close to the
-;# current date. Unlike algorithms that do a binary search (calling gmtime
-;# once for each bit of the time value, resulting in 32 calls), this algorithm
-;# calls it at most 6 times, and usually only once or twice. If you hit
-;# the month cache, of course, it doesn't call it at all.
+;# This file has been superseded by the Time::Local library module.
+;# It is implemented as a call to that module for backwards compatibility
+;# with code written for perl4; new code should use Time::Local directly.
+;# This legacy library is deprecated and will be removed in a future
+;# release of perl.
-;# timelocal is implemented using the same cache. We just assume that we're
-;# translating a GMT time, and then fudge it when we're done for the timezone
-;# and daylight savings arguments. The timezone is determined by examining
-;# the result of localtime(0) when the package is initialized. The daylight
-;# savings offset is currently assumed to be one hour.
+;# The current implementation shares with the original the questionable
+;# behavior of defining the timelocal() and timegm() functions in the
+;# namespace of whatever package was current when the first instance of
+;# C<require 'timelocal.pl';> was executed in a program.
-;# Both routines return -1 if the integer limit is hit. I.e. for dates
-;# after the 1st of January, 2038 on most machines.
+use Time::Local;
-CONFIG: {
- package timelocal;
-
- local($[) = 0;
- @epoch = localtime(0);
- $tzmin = $epoch[2] * 60 + $epoch[1]; # minutes east of GMT
- if ($tzmin > 0) {
- $tzmin = 24 * 60 - $tzmin; # minutes west of GMT
- $tzmin -= 24 * 60 if $epoch[5] == 70; # account for the date line
- }
+*timelocal::cheat = \&Time::Local::cheat;
- $SEC = 1;
- $MIN = 60 * $SEC;
- $HR = 60 * $MIN;
- $DAYS = 24 * $HR;
- $YearFix = ((gmtime(946684800))[5] == 100) ? 100 : 0;
- 1;
-}
-
-sub timegm {
- package timelocal;
-
- local($[) = 0;
- $ym = pack(C2, @_[5,4]);
- $cheat = $cheat{$ym} || &cheat;
- return -1 if $cheat<0;
- $cheat + $_[0] * $SEC + $_[1] * $MIN + $_[2] * $HR + ($_[3]-1) * $DAYS;
-}
-
-sub timelocal {
- package timelocal;
-
- local($[) = 0;
- $time = &main'timegm + $tzmin*$MIN;
- return -1 if $cheat<0;
- @test = localtime($time);
- $time -= $HR if $test[2] != $_[2];
- $time;
-}
-
-package timelocal;
-
-sub cheat {
- $year = $_[5];
- $month = $_[4];
- die "Month out of range 0..11 in timelocal.pl\n"
- if $month > 11 || $month < 0;
- die "Day out of range 1..31 in timelocal.pl\n"
- if $_[3] > 31 || $_[3] < 1;
- die "Hour out of range 0..23 in timelocal.pl\n"
- if $_[2] > 23 || $_[2] < 0;
- die "Minute out of range 0..59 in timelocal.pl\n"
- if $_[1] > 59 || $_[1] < 0;
- die "Second out of range 0..59 in timelocal.pl\n"
- if $_[0] > 59 || $_[0] < 0;
- $guess = $^T;
- @g = gmtime($guess);
- $year += $YearFix if $year < $epoch[5];
- $lastguess = "";
- while ($diff = $year - $g[5]) {
- $guess += $diff * (363 * $DAYS);
- @g = gmtime($guess);
- if (($thisguess = "@g") eq $lastguess){
- return -1; #date beyond this machine's integer limit
- }
- $lastguess = $thisguess;
- }
- while ($diff = $month - $g[4]) {
- $guess += $diff * (27 * $DAYS);
- @g = gmtime($guess);
- if (($thisguess = "@g") eq $lastguess){
- return -1; #date beyond this machine's integer limit
- }
- $lastguess = $thisguess;
- }
- @gfake = gmtime($guess-1); #still being sceptic
- if ("@gfake" eq $lastguess){
- return -1; #date beyond this machine's integer limit
- }
- $g[3]--;
- $guess -= $g[0] * $SEC + $g[1] * $MIN + $g[2] * $HR + $g[3] * $DAYS;
- $cheat{$ym} = $guess;
-}
+warn( "The 'timelocal.pl' legacy library is deprecated and will be"
+ . " removed in the next major release of perl. Please use the"
+ . " Time::Local module instead." );
https://perl5.git.perl.org / perl5.git / blobdiff