NAME

       XSaveContext, XFindContext, XDeleteContext, XUniqueContext - associative look-up routines

SYNTAX

       int XSaveContext(Display *display, XID rid, XContext context, _Xconst char *data);

       int XFindContext(Display *display, XID rid, XContext context, XPointer *data_return);

       int XDeleteContext(Display *display, XID rid, XContext context);

       XContext XUniqueContext(void);

ARGUMENTS

       context   Specifies the context type to which the data belongs.

       data      Specifies the data to be associated with the window and type.

       data_return
                 Returns the data.

       display   Specifies the connection to the X server.

       rid       Specifies the resource ID with which the data is associated.

DESCRIPTION

       If  an  entry  with the specified resource ID and type already exists, XSaveContext overrides it with the
       specified context.  The XSaveContext function returns a nonzero error code if an error has  occurred  and
       zero otherwise.  Possible errors are XCNOMEM (out of memory).

       Because  it  is a return value, the data is a pointer.  The XFindContext function returns a nonzero error
       code if an error has occurred and zero otherwise.  Possible errors are XCNOENT (context-not-found).

       The XDeleteContext function deletes the entry for the given resource ID and type from the data structure.
       This  function  returns the same error codes that XFindContext returns if called with the same arguments.
       XDeleteContext does not free the data whose address was saved.

       The XUniqueContext function creates a unique context type  that  may  be  used  in  subsequent  calls  to
       XSaveContext.

SEE ALSO

       Xlib - C Language X Interface