v2-0006-tsearch-use-global_libc_locale.patch

From 229d9ec22a6c8dc50a709ae5032896e7932d219b Mon Sep 17 00:00:00 2001
From: Jeff Davis <jeff@j-davis.com>
Date: Wed, 11 Jun 2025 10:07:29 -0700
Subject: [PATCH v2 6/7] tsearch: use global_libc_locale.

---
 configure                         |  2 +-
 configure.ac                      |  2 ++
 meson.build                       |  2 ++
 src/backend/tsearch/ts_locale.c   |  8 +++---
 src/backend/tsearch/wparser_def.c | 44 ++++++++++++++++++++++++++++---
 src/include/pg_config.h.in        |  6 +++++
 6 files changed, 55 insertions(+), 9 deletions(-)

diff --git a/configure b/configure
index 4f15347cc95..2660c29e0d2 100755
--- a/configure
+++ b/configure
@@ -15616,7 +15616,7 @@ fi
 LIBS_including_readline="$LIBS"
 LIBS=`echo "$LIBS" | sed -e 's/-ledit//g' -e 's/-lreadline//g'`
 
-for ac_func in backtrace_symbols copyfile copy_file_range elf_aux_info getauxval getifaddrs getpeerucred inet_pton kqueue localeconv_l mbstowcs_l posix_fallocate ppoll pthread_is_threaded_np setproctitle setproctitle_fast strsignal syncfs sync_file_range uselocale wcstombs_l
+for ac_func in backtrace_symbols copyfile copy_file_range elf_aux_info getauxval getifaddrs getpeerucred inet_pton iswxdigit_l isxdigit_l kqueue localeconv_l mbstowcs_l posix_fallocate ppoll pthread_is_threaded_np setproctitle setproctitle_fast strsignal syncfs sync_file_range uselocale wcstombs_l
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/configure.ac b/configure.ac
index 4b8335dc613..2d16c5fd43f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1789,6 +1789,8 @@ AC_CHECK_FUNCS(m4_normalize([
 	getifaddrs
 	getpeerucred
 	inet_pton
+	iswxdigit_l
+	isxdigit_l
 	kqueue
 	localeconv_l
 	mbstowcs_l
diff --git a/meson.build b/meson.build
index d142e3e408b..0bd6f9f2076 100644
--- a/meson.build
+++ b/meson.build
@@ -2880,6 +2880,8 @@ func_checks = [
   ['getpeerucred'],
   ['inet_aton'],
   ['inet_pton'],
+  ['iswxdigit_l'],
+  ['isxdigit_l'],
   ['kqueue'],
   ['localeconv_l'],
   ['mbstowcs_l'],
diff --git a/src/backend/tsearch/ts_locale.c b/src/backend/tsearch/ts_locale.c
index 4801fe90089..6b66fd1c05b 100644
--- a/src/backend/tsearch/ts_locale.c
+++ b/src/backend/tsearch/ts_locale.c
@@ -36,14 +36,14 @@ t_isalpha(const char *ptr)
 {
 	int			clen = pg_mblen(ptr);
 	wchar_t		character[WC_BUF_LEN];
-	locale_t	mylocale = 0;	/* TODO */
+	locale_t	mylocale = global_libc_locale;	/* TODO */
 
 	if (clen == 1 || database_ctype_is_c)
 		return isalpha(TOUCHAR(ptr));
 
 	char2wchar(character, WC_BUF_LEN, ptr, clen, mylocale);
 
-	return iswalpha((wint_t) character[0]);
+	return iswalpha_l((wint_t) character[0], mylocale);
 }
 
 int
@@ -51,14 +51,14 @@ t_isalnum(const char *ptr)
 {
 	int			clen = pg_mblen(ptr);
 	wchar_t		character[WC_BUF_LEN];
-	locale_t	mylocale = 0;	/* TODO */
+	locale_t	mylocale = global_libc_locale;	/* TODO */
 
 	if (clen == 1 || database_ctype_is_c)
 		return isalnum(TOUCHAR(ptr));
 
 	char2wchar(character, WC_BUF_LEN, ptr, clen, mylocale);
 
-	return iswalnum((wint_t) character[0]);
+	return iswalnum_l((wint_t) character[0], mylocale);
 }
 
 
diff --git a/src/backend/tsearch/wparser_def.c b/src/backend/tsearch/wparser_def.c
index e2dd3da3aa3..9a80d32b448 100644
--- a/src/backend/tsearch/wparser_def.c
+++ b/src/backend/tsearch/wparser_def.c
@@ -299,7 +299,7 @@ TParserInit(char *str, int len)
 	 */
 	if (prs->charmaxlen > 1)
 	{
-		locale_t	mylocale = 0;	/* TODO */
+		locale_t	mylocale = global_libc_locale;	/* TODO */
 
 		prs->usewide = true;
 		if (database_ctype_is_c)
@@ -411,6 +411,40 @@ TParserCopyClose(TParser *prs)
 }
 
 
+#ifndef HAVE_ISXDIGIT_L
+static int
+isxdigit_l(wint_t wc, locale_t loc)
+{
+#ifdef WIN32
+	return _isxdigit_l(wc, loc);
+#else
+	size_t		result;
+	locale_t	save_locale = uselocale(loc);
+
+	result = isxdigit(wc);
+	uselocale(save_locale);
+	return result;
+#endif
+}
+#endif
+#ifndef HAVE_ISWXDIGIT_L
+static int
+iswxdigit_l(wint_t wc, locale_t loc)
+{
+#ifdef WIN32
+	return _iswxdigit_l(wc, loc);
+#else
+	size_t		result;
+	locale_t	save_locale = uselocale(loc);
+
+	result = iswxdigit(wc);
+	uselocale(save_locale);
+	return result;
+#endif
+}
+#endif
+
+
 /*
  * Character-type support functions, equivalent to is* macros, but
  * working with any possible encodings and locales. Notes:
@@ -434,11 +468,13 @@ p_is##type(TParser *prs)													\
 			unsigned int c = *(prs->pgwstr + prs->state->poschar);			\
 			if (c > 0x7f)													\
 				return nonascii;											\
-			return is##type(c);												\
+			return is##type##_l(c, global_libc_locale);						\
 		}																	\
-		return isw##type(*(prs->wstr + prs->state->poschar));				\
+		return isw##type##_l(*(prs->wstr + prs->state->poschar),			\
+							 global_libc_locale);							\
 	}																		\
-	return is##type(*(unsigned char *) (prs->str + prs->state->posbyte));	\
+	return is##type##_l(*(unsigned char *) (prs->str + prs->state->posbyte),	\
+						global_libc_locale);								\
 }																			\
 																			\
 static int																	\
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 726a7c1be1f..f06396c94f4 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -229,6 +229,12 @@
 /* Define to 1 if you have the global variable 'int timezone'. */
 #undef HAVE_INT_TIMEZONE
 
+/* Define to 1 if you have the `iswxdigit_l' function. */
+#undef HAVE_ISWXDIGIT_L
+
+/* Define to 1 if you have the `isxdigit_l' function. */
+#undef HAVE_ISXDIGIT_L
+
 /* Define to 1 if __builtin_constant_p(x) implies "i"(x) acceptance. */
 #undef HAVE_I_CONSTRAINT__BUILTIN_CONSTANT_P
 
-- 
2.43.0