mtext_uppercase -

       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_uppercase(3m17n)

       Uppercase an M-text. The mtext_uppercase() function destructively converts each character in M-text mt to
       uppercase. Adjacent characters in mt may affect the case conversion. If the Mlanguage text property is
       attached to mt, it may also affect the conversion. The length of mt may change. Characters that cannot be
       converted to uppercase is left unchanged. All the text properties are inherited.

       mtext_uppercase -

           This function returns the length of the updated mt.

mtext_lowercase(), mtext_titlecase()

       int mtext_uppercase (MText * mt)