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locale.h(0P)		   POSIX Programmer's Manual		  locale.h(0P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       locale.h — category macros

SYNOPSIS
       #include <locale.h>

DESCRIPTION
       Some of the functionality described on this reference page extends  the
       ISO C  standard. Applications shall define the appropriate feature test
       macro (see the System Interfaces volume of POSIX.1‐2008,	 Section  2.2,
       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	Section	 7.3.3,	  LC_MONETARY	and   Section	7.3.4,
       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:

       LC_ALL
       LC_COLLATE
       LC_CTYPE
       LC_MESSAGES
       LC_MONETARY
       LC_NUMERIC
       LC_TIME

       which shall expand to integer constant expressions with distinct values
       for use as the first argument to the setlocale() function.

       Implementations	may  add  additional  masks using the form LC_* and an
       uppercase letter.

       The <locale.h> header shall contain at least the following macros  rep‐
       resenting  bitmasks for use with the newlocale() function for each sup‐
       ported locale category: LC_COLLATE_MASK LC_CTYPE_MASK  LC_MESSAGES_MASK
       LC_MONETARY_MASK LC_NUMERIC_MASK LC_TIME_MASK

       Implementations may add additional masks using the form LC_*_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 stan‐
       dard compilers.

	   locale_t	 duplocale(locale_t);
	   void		 freelocale(locale_t);
	   struct lconv *localeconv(void);
	   locale_t	 newlocale(int, const char *, locale_t);
	   char		*setlocale(int, const char *);
	   locale_t	 uselocale (locale_t);

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       Chapter 8, Environment Variables, <stddef.h>

       The System Interfaces  volume  of  POSIX.1‐2008,	 duplocale(),  freelo‐
       cale(), localeconv(), newlocale(), setlocale(), uselocale()

COPYRIGHT
       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
       cal  and	 Electronics  Engineers,  Inc  and  The	 Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum	 1  applied.)  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the	referee document. The original Standard can be obtained online
       at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,	 see  https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013			  locale.h(0P)
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