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       XSupportsLocale,  XSetLocaleModifiers  -  determine  locale  support  and configure locale


       Bool XSupportsLocale(void);

       char *XSetLocaleModifiers(_Xconst char *modifier_list);


                 Specifies the modifiers.


       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.


       Xlib - C Language X Interface