locale.h - category macros
[CX] Some of the functionality described on this reference page extends the ISO C standard. Applications shall define the appropriate feature test macro (see XSH The Compilation Environment ) to enable the visibility of these symbols in this header.
The <locale.h> header shall define the lconv structure, which shall include at least the following members. (See the definitions of LC_MONETARY in LC_MONETARY and LC_NUMERIC.)char *currency_symbol char *decimal_point char frac_digits char *grouping char *int_curr_symbol char int_frac_digits char int_n_cs_precedes char int_n_sep_by_space char int_n_sign_posn char int_p_cs_precedes char int_p_sep_by_space char int_p_sign_posn char *mon_decimal_point char *mon_grouping char *mon_thousands_sep char *negative_sign char n_cs_precedes char n_sep_by_space char n_sign_posn char *positive_sign char p_cs_precedes char p_sep_by_space char p_sign_posn char *thousands_sep
The <locale.h> header shall define NULL (as described in <stddef.h>) and at least the following as macros:
which shall expand to integer constant expressions with distinct values for use as the first argument to the setlocale() function.
Additional macro definitions, beginning with the characters LC_ and an uppercase letter, may also be specified by the implementation.
[CX] The <locale.h> header shall contain at least the following macros representing bitmasks for use with the newlocale() function for each supported locale category: LC_COLLATE_MASK LC_CTYPE_MASK LC_MESSAGES_MASK LC_MONETARY_MASK LC_NUMERIC_MASK LC_TIME_MASK
In addition, a macro to set the bits for all categories set shall be defined: LC_ALL_MASK
The <locale.h> header shall define LC_GLOBAL_LOCALE, a special locale object descriptor used by the duplocale() and uselocale() functions.
The <locale.h> header shall define the locale_t type, representing a locale object.
The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided for use with ISO C standard compilers.[CX] locale_t duplocale(locale_t); void freelocale(locale_t); struct lconv *localeconv(void); [CX] locale_t newlocale(int, const char *, locale_t); char *setlocale(int, const char *); [CX] locale_t uselocale (locale_t);
It is suggested that each category macro name for use in setlocale() have a corresponding macro name ending in _MASK for use in newlocale().
Environment Variables, <stddef.h>
XSH duplocale, freelocale , localeconv, newlocale, setlocale, uselocale
First released in Issue 3.
Included for alignment with the ISO C standard.
The lconv structure is expanded with new members (int_n_cs_precedes, int_n_sep_by_space, int_n_sign_posn, int_p_cs_precedes, int_p_sep_by_space, and int_p_sign_posn) for alignment with the ISO/IEC 9899:1999 standard.
Extensions beyond the ISO C standard are marked.
The duplocale(), freelocale(), newlocale(), and uselocale() functions are added from The Open Group Technical Standard, 2006, Extended API Set Part 4.
This reference page is clarified with respect to macros and symbolic constants.
POSIX.1-2008, Technical Corrigendum 1, XBD/TC1-2008/0060 [301,427] is applied.
POSIX.1-2008, Technical Corrigendum 2, XBD/TC2-2008/0062  is applied.
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