1 files changed, 119 insertions, 0 deletions
diff --git a/src/include/utils/pg_locale.h b/src/include/utils/pg_locale.h
new file mode 100644
index 0000000..9cb7d91
--- /dev/null
+++ b/src/include/utils/pg_locale.h
@@ -0,0 +1,119 @@
+/*-----------------------------------------------------------------------
+ *
+ * PostgreSQL locale utilities
+ *
+ * src/include/utils/pg_locale.h
+ *
+ * Copyright (c) 2002-2020, PostgreSQL Global Development Group
+ *
+ *-----------------------------------------------------------------------
+ */
+
+#ifndef _PG_LOCALE_
+#define _PG_LOCALE_
+
+#if defined(LOCALE_T_IN_XLOCALE) || defined(WCSTOMBS_L_IN_XLOCALE)
+#include <xlocale.h>
+#endif
+#ifdef USE_ICU
+#include <unicode/ucol.h>
+#endif
+
+#include "utils/guc.h"
+
+#ifdef USE_ICU
+/*
+ * ucol_strcollUTF8() was introduced in ICU 50, but it is buggy before ICU 53.
+ * (see
+ * <https://www.postgresql.org/message-id/flat/f1438ec6-22aa-4029-9a3b-26f79d330e72%40manitou-mail.org>)
+ */
+#if U_ICU_VERSION_MAJOR_NUM >= 53
+#define HAVE_UCOL_STRCOLLUTF8 1
+#else
+#undef HAVE_UCOL_STRCOLLUTF8
+#endif
+#endif
+
+
+/* GUC settings */
+extern char *locale_messages;
+extern char *locale_monetary;
+extern char *locale_numeric;
+extern char *locale_time;
+
+/* lc_time localization cache */
+extern char *localized_abbrev_days[];
+extern char *localized_full_days[];
+extern char *localized_abbrev_months[];
+extern char *localized_full_months[];
+
+
+extern bool check_locale_messages(char **newval, void **extra, GucSource source);
+extern void assign_locale_messages(const char *newval, void *extra);
+extern bool check_locale_monetary(char **newval, void **extra, GucSource source);
+extern void assign_locale_monetary(const char *newval, void *extra);
+extern bool check_locale_numeric(char **newval, void **extra, GucSource source);
+extern void assign_locale_numeric(const char *newval, void *extra);
+extern bool check_locale_time(char **newval, void **extra, GucSource source);
+extern void assign_locale_time(const char *newval, void *extra);
+
+extern bool check_locale(int category, const char *locale, char **canonname);
+extern char *pg_perm_setlocale(int category, const char *locale);
+extern void check_strxfrm_bug(void);
+
+extern bool lc_collate_is_c(Oid collation);
+extern bool lc_ctype_is_c(Oid collation);
+
+/*
+ * Return the POSIX lconv struct (contains number/money formatting
+ * information) with locale information for all categories.
+ */
+extern struct lconv *PGLC_localeconv(void);
+
+extern void cache_locale_time(void);
+
+
+/*
+ * We define our own wrapper around locale_t so we can keep the same
+ * function signatures for all builds, while not having to create a
+ * fake version of the standard type locale_t in the global namespace.
+ * pg_locale_t is occasionally checked for truth, so make it a pointer.
+ */
+struct pg_locale_struct
+{
+	char		provider;
+	bool		deterministic;
+	union
+	{
+#ifdef HAVE_LOCALE_T
+		locale_t	lt;
+#endif
+#ifdef USE_ICU
+		struct
+		{
+			const char *locale;
+			UCollator  *ucol;
+		}			icu;
+#endif
+		int			dummy;		/* in case we have neither LOCALE_T nor ICU */
+	}			info;
+};
+
+typedef struct pg_locale_struct *pg_locale_t;
+
+extern pg_locale_t pg_newlocale_from_collation(Oid collid);
+
+extern char *get_collation_actual_version(char collprovider, const char *collcollate);
+
+#ifdef USE_ICU
+extern int32_t icu_to_uchar(UChar **buff_uchar, const char *buff, size_t nbytes);
+extern int32_t icu_from_uchar(char **result, const UChar *buff_uchar, int32_t len_uchar);
+#endif
+
+/* These functions convert from/to libc's wchar_t, *not* pg_wchar_t */
+extern size_t wchar2char(char *to, const wchar_t *from, size_t tolen,
+						 pg_locale_t locale);
+extern size_t char2wchar(wchar_t *to, size_t tolen,
+						 const char *from, size_t fromlen, pg_locale_t locale);
+
+#endif							/* _PG_LOCALE_ */