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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)