towctrans.c

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#include <string.h>
#include <wctype.h>

wint_t towctrans(wint_t wc, wctrans_t trans)
{
    if(trans == (wctrans_t)1)
    {
        return towupper(wc);
    }

    if(trans == (wctrans_t)2)
    {
        return towlower(wc);
    }

    return wc;
}