The addition causes the date to shift
forward into 1st of the next month, because a 0-based offset
is compared to be "more than" the days in the month instead of "more than
or equal to".
This is triggered by corner-cases where transition date is 6 days
off the end of the month and our calculations put it at N+1th day of the
month (where N is the number of days in the month). The subtraction should
be triggered to move the date back a week, putting it 6 days off the end;
for example, October 25 for CET DST transition; but due to incorrect comparison
the date isn't shifted back, we add 31 days to October 1st and end up
at November 1st).
Fixes issue #2215.
The win32 implementation of `g_getenv()` uses GSlice (from within
GQuark), which results in a deadlock when examining the `G_SLICE`
environment variable.
Fix that by inlining a basic implementation of `g_getenv()` at that call
site.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #2225
This reverts commit 851241f19a.
That commit avoids a performance regression but introduces a behavior regression:
changes to /etc/localtime have no effect for the remaining of the application's
runtime.
With the optimization introduced by the previous commit, we can pass NULL to
g_time_zone_new() repeatedly with no performance drawback, so we no longer have
to workaround this case.
Fixes: #2224
We cache GTimeZone instances to avoid expensive construction when the
same id is requested again.
However, if the NULL id is passed to g_time_zone_new(), we always
construct a new instance for the default/fallback timezone.
With the recent introduction of some heavy calculations[1], repeated
instance construction in such cases has visible performance impact in
nautilus list view and other such GtkTreeView consumers.
To avoid this, cache reference to a constructed default timezone and
use it the next time g_time_zone_new() is called with NULL argument,
as long as the default identifier doesn't change. We already did the
same for the local timezone[2].
Fixes: https://gitlab.gnome.org/GNOME/glib/-/issues/2204
Based on idea proposed by Sebastian Keller <skeller@gnome.org>.
[1] 25d950b61f
[2] 551e83662d
We have been passing a &resolved_identifier address around for multiple
functions to set it. Each function may either:
1. leaving it for the next function to set, if returning early;
2. set it to a duplicate of the passed identifier, if not NULL;
3. get a fallback value and set it, otherwise.
This can be simplified by setting it early to either:
1. a duplicate of the passed identifier, if not NULL;
2. a fallback value, otherwise.
This way we can avoid some unnecessary string duplication and freeing.
Also, on Windows, we avoid calling windows_default_tzname() twice.
But the main motivation for this change is enabling the performance
optimization in the next commit.
When the TZ environment variable is not set, we get the local timezone
identifier by reading specific files.
We are going to need these identifiers earlier, so split this logic into
its own function, in preparation for the next commit.
Based on idea proposed by Sebastian Keller <skeller@gnome.org>.
commit 916297be79 added a hash table
to provide constant time lookups of signal handlers.
Unfortunately, that commit neglected to remove handlers from
g_signal_connect_object calls from the hash table that are
disconnected implicitly when the associated object goes away.
This commit addresses that bug by changing the closure invalidate
handler associated with the signal connection to properly remove the
handler from the hash table.
When unref'ing child sources, the lock is already held. But instead of
passing TRUE to g_source_unref_internal it currently passes whether the
lock was already held outside of the current invocation. Just pass TRUE
to fix this possible issue.
`g_local_file_fstatat()` needs to fall back to returning an error if
`fstatat()` isn’t defined, which is the case on older versions of macOS
(as well as Windows, which was already handled). Callers shouldn’t call
`g_local_file_fstatat()` in these cases. (That’s already the case.)
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #2203
The return value from `g_utf8_get_char_validated()` is a `gunichar`,
which is unsigned, so comparing it with `> 0` is always going to return
true, even for return values `(gunichar) -1` and `(gunichar) -2`, which
indicate errors.
Handle them more explicitly.
oss-fuzz#26083
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This is exactly the test case from oss-fuzz which triggers a negative
overflow when constructing dates.
oss-fuzz#22758
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This bumps the coverage of `parse_host()` and `parse_ip_literal()` up to
100% of lines and branches.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
The previous parsing code could read off the end of a URI if it had an
incorrect %-escaped character in.
Fix that, and more closely implement parsing for the syntax defined in
RFC 6874, which is the amendment to RFC 3986 which specifies zone ID
syntax.
This requires reworking some network-address tests, which were
previously treating zone IDs incorrectly.
oss-fuzz#23816
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Having the goto labels at the bottom of a function makes things a little
more readable. This introduces no functional changes.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This introduces no functional changes, but makes the memory ownership a
little clearer and reduces the length of the code.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This introduces no functional changes, but will make future changes to
the code a little cleaner.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
g_module_symbol() internally calls CreateToolhelp32Snapshot() which
in some circumstances returns ERROR_BAD_LENGTH and according to the docs
should lead to CreateToolhelp32Snapshot() being retried by the caller.
This retry logic was missing and for example led to g_module_symbol()
not succeeding if another thread happened to call the wrong function
at the wrong time.
This got noticed in the g-i build of gtk4 where g-i would call g_module_symbol()
on all gtk4 _get_type symbols and while inspecting the properties gtk4 would
spawn a thread calling SHGetSpecialFolderLocation() somewhere down the line.
During the call to SHGetSpecialFolderLocation() CreateToolhelp32Snapshot() would
return with ERROR_BAD_LENGTH for a short period of time and make g_module_symbol()
fail, which lead to "Invalid GType function" errors in g-i.
Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3213
Emptying trash over `gio trash` is a bit slow in comparison to plain
`rm -r`. On my system, it took about 3 min to empty the trash with a
folder containing 600 000 files, which is not ideal as `rm -r` call
took just a few seconds. I found that `g_file_delete` is implemented
differently for locations provided by the trash backend. The trash
backend prevents modifications of trashed content thus the delete
operation is allowed only for the top-level files and folders. So it
is not necessary to recursive delete all files as the permission
denied error is returned anyway. Let's call `g_file_delete` only for
top-level items, which reduces the time necessary for emptying trash
from minutes to seconds...
See: https://gitlab.gnome.org/GNOME/nautilus/-/issues/1589
Rather than invalidating the cache by comparing `TZ` to the cached
timezone identifier, key entirely off the value of `TZ` (and a cached
copy of it).
This fixes the timezone cache being constantly invalidated if `TZ` is
`NULL` (which will always differ from the identifier of the default
local timezone which is constructed from `g_time_zone_new (NULL)`.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #2204
