third_party/ulib/musl/src/multibyte/wctob.c

#include "internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>

int wctob(wint_t c) {
    if (c < 128U)
        return c;
    if (MB_CUR_MAX == 1 && IS_CODEUNIT(c))
        return (unsigned char)c;
    return EOF;
}