hyperlight-libc 0.16.0

This crate provides picolibc for Hyperlight guests. It builds the picolibc library and generates bindings to the libc types and functions.
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/* Copyright (c) 2002 Thomas Fitzsimmons <fitzsim@redhat.com> */
#include <wchar.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "local.h"

wint_t
btowc(int c)
{
    mbstate_t     mbs;
    int           retval = 0;
    wchar_t       pwc;
    unsigned char b;

    if (c == EOF)
        return WEOF;

    b = (unsigned char)c;

    /* Put mbs in initial state. */
    memset(&mbs, '\0', sizeof(mbs));

    retval = __MBTOWC(&pwc, (const char *)&b, 1, &mbs);

    if (retval != 0 && retval != 1)
        return WEOF;

    return (wint_t)pwc;
}