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pg_include/utils/pg_locale.h

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+/*-----------------------------------------------------------------------
+ *
+ * PostgreSQL locale utilities
+ *
+ * src/include/utils/pg_locale.h
+ *
+ * Copyright (c) 2002-2012, PostgreSQL Global Development Group
+ *
+ *-----------------------------------------------------------------------
+ */
+
+#ifndef _PG_LOCALE_
+#define _PG_LOCALE_
+
+#include <locale.h>
+#ifdef LOCALE_T_IN_XLOCALE
+#include <xlocale.h>
+#endif
+
+#include "utils/guc.h"
+
+
+/* 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 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.
+ * The fake version of pg_locale_t can be checked for truth; that's
+ * about all it will be needed for.
+ */
+#ifdef HAVE_LOCALE_T
+typedef locale_t pg_locale_t;
+#else
+typedef int pg_locale_t;
+#endif
+
+extern pg_locale_t pg_newlocale_from_collation(Oid collid);
+
+/* These functions convert from/to libc's wchar_t, *not* pg_wchar_t */
+#ifdef USE_WIDE_UPPER_LOWER
+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
+
+#endif   /* _PG_LOCALE_ */