third_party/ulib/musl/src/stdio/fwide.c

#include "locale_impl.h"
#include "stdio_impl.h"

int fwide(FILE* f, int mode) {
    FLOCK(f);
    if (mode) {
        if (!f->locale)
            f->locale = MB_CUR_MAX == 1 ? C_LOCALE : UTF8_LOCALE;
        if (!f->mode)
            f->mode = mode > 0 ? 1 : -1;
    }
    mode = f->mode;
    FUNLOCK(f);
    return mode;
}