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gh-122272: guarantee specifiers %F and %C for datetime.strftime to be 0-padded #122436

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Merged
serhiy-storchaka merged 11 commits into from
Aug 23, 2024
Merged

gh-122272: guarantee specifiers %F and %C for datetime.strftime to be 0-padded #122436

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61c2c61
gh-122272: guarantee specifiers %F and %C for datetime.strftime to be…
blhsing Jul 30, 2024
8dc1100
removed trailing spaces
blhsing Jul 30, 2024
f85cd69
📜🤖 Added by blurb_it.
blurb-it[bot] Jul 30, 2024
2fd7093
handle %C and %F only when the C library supports them (at least C99)
blhsing Jul 30, 2024
8fe9521
use autoconf instead to test if c99-specific specifiers are supported
blhsing Jul 30, 2024
4e1ea89
generate header
blhsing Jul 30, 2024
bfd2f18
corrected logics of checks for c99 support
blhsing Jul 30, 2024
fd8dd30
allocate 6 more bytes for the formatted date buffer only when %F is s…
blhsing Jul 31, 2024
3e36832
pass through month and day to time.strftime for %F; made _supports_c9…
blhsing Aug 16, 2024
3530288
validate timetuple as a tuple; cache result of _can_support_c99 upon …
blhsing Aug 22, 2024
c9c51d7
use PySequence_GetItem instead of PyTuple_GetItem for better error ha…
blhsing Aug 23, 2024
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corrected logics of checks for c99 support
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@blhsing
blhsing committed Jul 30, 2024
commit bfd2f18648bf4137b8e72505efe0d0c9ad10ed7a
4 changes: 2 additions & 2 deletions Lib/_pydatetime.py
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Original file line number Diff line number Diff line change
Expand Up @@ -221,9 +221,9 @@ def _can_support_c99():
if _supports_c99 is None:
try:
_supports_c99 = (
_time.strftime("%F", (99, 1, 1, 0, 0, 0, 0, 1, 0)) != "%F")
_time.strftime("%F", (1900, 1, 1, 0, 0, 0, 0, 1, 0)) == "1900-01-01")
except ValueError:
_supports_c99 = True
pass
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return _supports_c99

# Correctly substitute for %z and %Z escapes in strftime formats.
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2 changes: 1 addition & 1 deletion Lib/test/datetimetester.py
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Expand Up @@ -1711,7 +1711,7 @@ def test_strftime_y2k(self):
(1970, 0),
)
specifiers = 'YG'
if _time.strftime('%F', (99, 1, 1, 0, 0, 0, 0, 1, 0)) != '%F':
if _time.strftime('%F', (1900, 1, 1, 0, 0, 0, 0, 1, 0)) == '1900-01-01':
specifiers += 'FC'
for year, g_offset in dataset:
for specifier in specifiers:
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10 changes: 5 additions & 5 deletions configure
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10 changes: 5 additions & 5 deletions configure.ac
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Expand Up @@ -6709,19 +6709,19 @@ int main(void)
{
char full_date[11];
struct tm date = {
.tm_year = -1801,
.tm_year = 0,
.tm_mon = 0,
.tm_mday = 1
};
if (strftime(full_date, sizeof(full_date), "%F", &date) && !strcmp(full_date, "%F")) {
return 1;
if (strftime(full_date, sizeof(full_date), "%F", &date) && !strcmp(full_date, "1900-01-01")) {
return 0;
}
return 0;
return 1;
}
]])],
[ac_cv_strftime_c99_support=yes],
[ac_cv_strftime_c99_support=no],
[ac_cv_strftime_c99_support=yes])])
[ac_cv_strftime_c99_support=no])])
if test "$ac_cv_strftime_c99_support" = yes
then
AC_DEFINE([Py_STRFTIME_C99_SUPPORT], [1],
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