mtext_insert -

       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_insert(3m17n)

       Insert sub-text of an M-text into another M-text. The mtext_insert() function inserts sub-text of M-text
       mt2 between from (inclusive) and to (exclusive) into M-text mt1, at position pos. As a result, mt1 is
       lengthen by (to - from). On insertion, all the text properties of the sub-text of mt2 are inherited.

           MERROR_MTEXT, MERROR_RANGE

       mtext_insert -

           If the operation was successful, mtext_insert() returns 0. Otherwise, it returns -1 and assigns an
           error code to the external variable merror_code.

mtext_ins()

       int mtext_insert (MText * mt1, int pos, MText * mt2, int from, int to)