/*-
 * Copyright (c) 2011 Google, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stand.h>

#include "libuserboot.h"

ssize_t
userboot_copyin(const void *src, vm_offset_t va, size_t len)
{

        CALLBACK(copyin, src, va, len);
        return (len);
}

ssize_t
userboot_copyout(vm_offset_t va, void *dst, size_t len)
{

        CALLBACK(copyout, va, dst, len);
        return (len);
}

ssize_t
userboot_readin(readin_handle_t fd, vm_offset_t va, size_t len)
{
        ssize_t res, s;
        size_t sz;
        char buf[4096];

        res = 0;
        while (len > 0) {
                sz = len;
                if (sz > sizeof(buf))
                        sz = sizeof(buf);
                s = VECTX_READ(fd, buf, sz);
                if (s == 0)
                        break;
                if (s < 0)
                        return (s);
                CALLBACK(copyin, buf, va, s);
                len -= s;
                res += s;
                va += s;
        }
        return (res);
}