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Revert "Use 64-bit years"

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This reverts commit cfc3a953ae.
This commit is contained in:
Justine Tunney 2022-05-12 06:11:22 -07:00
parent cf73bbd678
commit dd9ab01d25
13 changed files with 484 additions and 544 deletions
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47
test/libc/time/strftime_test.c
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@ -18,10 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/limits.h"
#include "libc/log/check.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "libc/time/time.h"
@ -79,6 +76,12 @@ TEST(strftime_201, rfc822_GoogleStandardTime) {
FormatTime("%a, %d %b %y %T %z", localtime(&t)));
}
/* TEST(xiso8601, testModernity_TODO) { */
/* int64_t t = (1600 - 1970) * 31536000; */
/* ASSERT_STREQ("1600-01-01T00:00:00Z", */
/* FormatTime("%Y-%m-%dT%H:%M:%SZ", gmtime(&t))); */
/* } */
TEST(xiso8601, testAtLeastBetterThanTraditionalUnixLimit) {
int64_t t = 10737418235;
ASSERT_STREQ("2310-04-04T16:10:35Z",
@ -91,36 +94,8 @@ TEST(xiso8601, testSomethingHuge) {
FormatTime("%Y-%m-%dT%H:%M:%SZ", gmtime(&t)));
}
// this requires 52 bit year
TEST(xiso8601, testBigBang) {
struct tm tm;
int64_t t = -13700000000L * 31536000L;
CHECK_NOTNULL(gmtime_r(&t, &tm));
ASSERT_STREQ("-13690902019-07-22T00:00:00Z",
FormatTime("%Y-%m-%dT%H:%M:%SZ", &tm));
}
// stelliferous era is 10**6 < n < 10**14 years (71-bit)
// we support up to approx. 10**11 yr after the big bang
TEST(xiso8601, testMostOfStelliferousEra) {
struct tm tm;
int64_t t = -13700000000L + 100000000000 /*000*/ * 31536000L;
CHECK_NOTNULL(gmtime_r(&t, &tm));
ASSERT_STREQ("99933607290-12-11T04:26:40Z",
FormatTime("%Y-%m-%dT%H:%M:%SZ", &tm));
}
const char *GmtimeFormatTime(void) {
struct tm tm;
int64_t t = -13700000000L * 31536000L;
CHECK_NOTNULL(gmtime_r(&t, &tm));
return FormatTime("%Y-%m-%dT%H:%M:%SZ", &tm);
}
BENCH(strftime, bench) {
struct tm tm;
int64_t t = -13700000000L * 31536000L;
CHECK_NOTNULL(gmtime_r(&t, &tm));
EZBENCH2("strftime", donothing, FormatTime("%Y-%m-%dT%H:%M:%SZ", &tm));
EZBENCH2("gmtime+strftime", donothing, GmtimeFormatTime());
}
/* TEST(xiso8601, testMostOfStelliferousEra_TODO) { */
/* int64_t t = INT64_MAX; */
/* ASSERT_STREQ("somethinghuge-01-01T00:00:00Z", */
/* FormatTime("%Y-%m-%dT%H:%M:%SZ", gmtime(&t))); */
/* } */