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pg_locale.h
/*----------------------------------------------------------------------- * * 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_ */