public inbox for libstdc++-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r13-7629] libstdc++: Check for multiple modifiers in chrono format string [PR110708]
@ 2023-07-28 17:32 Jonathan Wakely
0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2023-07-28 17:32 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:74f1c016f44daf18e4bed76b283cd5bfd0b5c8c7
commit r13-7629-g74f1c016f44daf18e4bed76b283cd5bfd0b5c8c7
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Tue Jul 18 10:36:37 2023 +0100
libstdc++: Check for multiple modifiers in chrono format string [PR110708]
The logic for handling modified chrono specs like %Ey was just
restarting the loop after each modifier, and not checking whether we'd
already seen a modifier.
libstdc++-v3/ChangeLog:
PR libstdc++/110708
* include/bits/chrono_io.h (__formatter_chrono::_M_parse): Only
allow a single modifier.
* testsuite/std/time/format.cc: Check multiple modifiers.
(cherry picked from commit 52bfec7ea0eb0f1a4c5bfa55b0d6b9b6c8808e26)
Diff:
---
libstdc++-v3/include/bits/chrono_io.h | 5 +++++
libstdc++-v3/testsuite/std/time/format.cc | 10 ++++++++++
2 files changed, 15 insertions(+)
diff --git a/libstdc++-v3/include/bits/chrono_io.h b/libstdc++-v3/include/bits/chrono_io.h
index 87caa30b83a..5f06a6d76b4 100644
--- a/libstdc++-v3/include/bits/chrono_io.h
+++ b/libstdc++-v3/include/bits/chrono_io.h
@@ -426,6 +426,11 @@ namespace __format
break;
case 'O':
case 'E':
+ if (__mod) [[unlikely]]
+ {
+ __allowed_mods = _Mod_none;
+ break;
+ }
__mod = __c;
continue;
default:
diff --git a/libstdc++-v3/testsuite/std/time/format.cc b/libstdc++-v3/testsuite/std/time/format.cc
index b05e5da1af8..0dc45d58dce 100644
--- a/libstdc++-v3/testsuite/std/time/format.cc
+++ b/libstdc++-v3/testsuite/std/time/format.cc
@@ -68,6 +68,16 @@ test_bad_format_strings()
// modifier not valid for conversion specifier
VERIFY( not is_format_string_for("{:%Ea}", t) );
VERIFY( not is_format_string_for("{:%Oa}", t) );
+
+ // more than one modifier (PR libstdc++/110708)
+ VERIFY( not is_format_string_for("{:%EEc}", t) );
+ VERIFY( not is_format_string_for("{:%EEEc}", t) );
+ VERIFY( not is_format_string_for("{:%OOd}", t) );
+ VERIFY( not is_format_string_for("{:%OOOd}", t) );
+ VERIFY( not is_format_string_for("{:%EEy}", t) );
+ VERIFY( not is_format_string_for("{:%OOy}", t) );
+ VERIFY( not is_format_string_for("{:%OEy}", t) );
+ VERIFY( not is_format_string_for("{:%EOy}", t) );
}
template<typename I>
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-07-28 17:32 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-07-28 17:32 [gcc r13-7629] libstdc++: Check for multiple modifiers in chrono format string [PR110708] Jonathan Wakely
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).