If you're asking how to convert to uppercase from XS, you'd start with an upgraded string, then call toUPPER_uvchr or toUPPER_utf8 repeatedly. (Or call a Perl function that uses uc.)

In reply to Re^6: Memory Leak with XS but not pure C by ikegami
in thread Memory Leak with XS but not pure C by FrankFooty

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