locale.h(0p) — Linux manual page

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.1‐2017, 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.

       Additional macro definitions, beginning with the characters LC_
       and an uppercase letter, may also be specified by the
       implementation.

       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.

           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

       It is suggested that each category macro name for use in
       setlocale() have a corresponding macro name ending in _MASK for
       use in newlocale().

FUTURE DIRECTIONS

       None.

SEE ALSO

       Chapter 8, Environment Variables, stddef.h(0p)

       The System Interfaces volume of POSIX.1‐2017, duplocale(3p),
       freelocale(3p), localeconv(3p), newlocale(3p), setlocale(3p),
       uselocale(3p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                      locale.h(0P)

Pages that refer to this page: ctype.h(0p), langinfo.h(0p), monetary.h(0p), string.h(0p), strings.h(0p), time.h(0p), wchar.h(0p), wctype.h(0p), duplocale(3p), freelocale(3p), isalpha(3p), isblank(3p), iscntrl(3p), isdigit(3p), isgraph(3p), islower(3p), isprint(3p), ispunct(3p), isspace(3p), isupper(3p), iswalnum(3p), iswalpha(3p), iswblank(3p), iswcntrl(3p), iswctype(3p), iswdigit(3p), iswgraph(3p), iswlower(3p), iswprint(3p), iswpunct(3p), iswspace(3p), iswupper(3p), iswxdigit(3p), localeconv(3p), newlocale(3p), nl_langinfo(3p), setlocale(3p), tolower(3p), toupper(3p), towlower(3p), towupper(3p), uselocale(3p)

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