mplist_put -

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free
       Documentation License <http://www.gnu.org/licenses/fdl.html>.

Version 1.8.4                                    Mon Sep 25 2023                               mplist_put(3m17n)

       Set the value of a property in a property list. The mplist_put() function searches property list plist
       from the beginning for a property whose key is key. If such a property is found, its value is changed to
       value. Otherwise, a new property whose key is key and value is value is appended at the end of plist. See
       the documentation of mplist_add() for the restriction on key and val.

       If key is a managing key, val must be a managed object. In this case, the reference count of the old
       value, if not NULL, is decremented by one, and that of val is incremented by one.

       mplist_put -

           If the operation was successful, mplist_put() returns a sublist of plist whose first element is the
           just modified or added one. Otherwise, it returns NULL.

MPlist* mplist_put (MPlist * plist, MSymbol key, void * val)