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#include <wctype.h>
#include "wchar.h"
#include "stdlib.h"
#include "../_assert.h"
/** convert a wide uppercase letter to lowercase **/
wint_t towlower(wint_t wc)
{
ASSERT_REPRESENTABLE(wc, WCHAR_MIN, WCHAR_MAX, "wchar_t", WEOF);
if (!iswupper(wc)) {
return wc;
}
wctrans_t trans = wctrans("tolower");
return towctrans(wc, trans);
}
/***
The fn(towlower) function converts a wide uppercase letter to its equivalent
lowercase letter in the current locale.
***/
/* RETURN(arg(c)): arg(wc) was not a wide uppercase letter or it has no equivalent lowercase letter */
/* RETURN: arg(wc) converted to lowercase */
/* UNSPECIFIED: - */
/* IMPLEMENTATION: - */
/* LOCALE: LC_CTYPE */
/*
STDC(199409)
*/
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