NAME

       XSupportsLocale, XSetLocaleModifiers - determine locale support and configure locale
       modifiers

SYNTAX

       Bool XSupportsLocale(void);

       char *XSetLocaleModifiers(char *modifier_list);

ARGUMENTS

       modifier_list
                 Specifies the modifiers.

DESCRIPTION

       The XSupportsLocale function returns True if Xlib functions are capable of operating under
       the current locale.  If it returns False, Xlib locale-dependent functions for which the
       XLocaleNotSupported return status is defined will return XLocaleNotSupported.  Other Xlib
       locale-dependent routines will operate in the ``C'' locale.

       The XSetLocaleModifiers function sets the X modifiers for the current locale setting.  The
       modifier_list argument is a null-terminated string of the form ``{@category=value}'', that
       is, having zero or more concatenated ``@category=value'' entries, where category is a
       category name and value is the (possibly empty) setting for that category.  The values are
       encoded in the current locale.  Category names are restricted to the POSIX Portable
       Filename Character Set.

       The local host X locale modifiers announcer (on POSIX-compliant systems, the XMODIFIERS
       environment variable) is appended to the modifier_list to provide default values on the
       local host.  If a given category appears more than once in the list, the first setting in
       the list is used.  If a given category is not included in the full modifier list, the
       category is set to an implementation-dependent default for the current locale.  An empty
       value for a category explicitly specifies the implementation-dependent default.

       If the function is successful, it returns a pointer to a string.  The contents of the
       string are such that a subsequent call with that string (in the same locale) will restore
       the modifiers to the same settings.  If modifier_list is a NULL pointer,
       XSetLocaleModifiers also returns a pointer to such a string, and the current locale
       modifiers are not changed.

       If invalid values are given for one or more modifier categories supported by the locale, a
       NULL pointer is returned, and none of the current modifiers are changed.

       At program startup, the modifiers that are in effect are unspecified until the first
       successful call to set them.  Whenever the locale is changed, the modifiers that are in
       effect become unspecified until the next successful call to set them.  Clients should
       always call XSetLocaleModifiers with a non-NULL modifier_list after setting the locale
       before they call any locale-dependent Xlib routine.

       The only standard modifier category currently defined is ``im'', which identifies the
       desired input method.  The values for input method are not standardized.  A single locale
       may use multiple input methods, switching input method under user control.  The modifier
       may specify the initial input method in effect or an ordered list of input methods.
       Multiple input methods may be specified in a single im value string in an implementation-
       dependent manner.

       The returned modifiers string is owned by Xlib and should not be modified or freed by the
       client.  It may be freed by Xlib after the current locale or modifiers are changed.  Until
       freed, it will not be modified by Xlib.

SEE ALSO

       Xlib - C Language X Interface