mtext_spn -

       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                                mtext_spn(3m17n)

       Search an M-text for a set of characters. The mtext_spn() function returns the length of the initial
       segment of M-text mt1 that consists entirely of characters in M-text mt2.

       mtext_spn -

mtext_cspn()

       int mtext_spn (MText * mt, MText * accept)