From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 13 Dec 2023 12:00:45 +0000 (+0000)
Subject: libstdc++: Fix regression in std::format output of %Y for negative years
X-Git-Tag: basepoints/gcc-15~3646
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad537ccd525fd3af759febd6c0936f82de808a70;p=thirdparty%2Fgcc.git

libstdc++: Fix regression in std::format output of %Y for negative years

The change in r14-6468-ga01462ae8bafa8 was only supposed to apply to %C
formats, not %Y.

libstdc++-v3/ChangeLog:

	* include/bits/chrono_io.h (__formatter_chrono::_M_C_y_Y): Do
	not round century down for %Y formats.
---

diff --git a/libstdc++-v3/include/bits/chrono_io.h b/libstdc++-v3/include/bits/chrono_io.h
index b63b8592ebac..bcd76e4ab7b0 100644
--- a/libstdc++-v3/include/bits/chrono_io.h
+++ b/libstdc++-v3/include/bits/chrono_io.h
@@ -825,7 +825,7 @@ namespace __format
 		{
 		  __s.assign(1, _S_plus_minus[1]);
 		  // For floored division -123//100 is -2 and -100//100 is -1
-		  if ((__ci * 100) != __yi)
+		  if (__conv == 'C' && (__ci * 100) != __yi)
 		    ++__ci;
 		}
 	      if (__ci >= 100) [[unlikely]]