Commit: patch 9.2.0399: MS-Windows: compile warning in strptime.c

[Christian Brabandt]

patch 9.2.0399: MS-Windows: compile warning in strptime.c

Commit: https://github.com/vim/vim/commit/a622dda91597f379bcbddb2e4370ef1ea61fbc47
Author: Yasuhiro Matsumoto <matt...@gmail.com>
Date: Mon Apr 27 17:10:25 2026 +0000

patch 9.2.0399: MS-Windows: compile warning in strptime.c

Problem: MS-Windows: compile warning in strptime.c
(John Marriott, after v9.2.0398)
Solution: Fix the compile warning (Yasuhiro Matsumoto).

Use _get_tzname() instead of the deprecated tzname[] global on UCRT and
MSVC builds; older MinGW (msvcrt.dll) keeps using tzname[] as a
fallback.

related: #20054
closes: #20079

Signed-off-by: Yasuhiro Matsumoto <matt...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/strptime.c b/src/strptime.c
index ca6fcd8a9..0d1663cf0 100644
--- a/src/strptime.c
+++ b/src/strptime.c
@@ -70,9 +70,13 @@
#define isleap_sum(a, b) \
isleap(((unsigned)(a) + (unsigned)(b)) % 400)

-#ifdef _MSC_VER
-# define timezone _timezone
-# define tzname _tzname
+/*
+ * _get_tzname() is provided by the UCRT and by the MSVC CRT. Older MinGW
+ * builds linking against msvcrt.dll fall back to the deprecated tzname[]
+ * global (mingw-w64 already exposes the POSIX-named tzname[]).
+ */
+#if defined(_UCRT) || defined(_MSC_VER)
+# define USE_GET_TZNAME
#endif

/* Locale tables (English / "C" locale). */
@@ -571,10 +575,27 @@ namedzone:
continue;
}
/*
- * Our current timezone
+ * Our current timezone. Prefer _get_tzname() over the
+ * tzname[] global, which UCRT marks deprecated because it
+ * may be inaccurate after locale changes.
*/
+#ifdef USE_GET_TZNAME
+ {
+ char tzbuf[2][32];
+ const char *tznames[2] = { tzbuf[0], tzbuf[1] };
+ size_t tzlen;
+
+ _tzset();
+ if (_get_tzname(&tzlen, tzbuf[0], sizeof(tzbuf[0]), 0) != 0)
+ tzbuf[0][0] = NUL;
+ if (_get_tzname(&tzlen, tzbuf[1], sizeof(tzbuf[1]), 1) != 0)
+ tzbuf[1][0] = NUL;
+ ep = find_string(bp, &i, tznames, NULL, 2);
+ }
+#else
ep = find_string(bp, &i,
(const char *const *)tzname, NULL, 2);
+#endif
if (ep != NULL)
{
tm->tm_isdst = i;
diff --git a/src/version.c b/src/version.c
index fc2cb3b8d..454153955 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 399,
/**/
398,
/**/