}

func (a *IPAddr) toLocal(net string) sockaddr {
	return &IPAddr{loopbackIP(net), a.Zone}
}

func (c *IPConn) readFrom(b []byte) (int, *IPAddr, error) {
	// TODO(cw,rsc): consider using readv if we know the family
	// type to avoid the header trim/copy
	var addr *IPAddr
	n, sa, err := c.fd.readFrom(b)
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		addr = &IPAddr{IP: sa.Addr[0:]}

	return uintptr(offs), uintptr(uint64(offs) >> (longBits - 1) >> 1) // two shifts to avoid false positive in vet
}

func Readv(fd int, iovs [][]byte) (n int, err error) {
	iovecs := make([]Iovec, 0, minIovec)
	iovecs = appendBytes(iovecs, iovs)
	n, err = readv(fd, iovecs)
	readvRacedetect(iovecs, n, err)
	return n, err
}

func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) {

	_, _, e1 := Syscall(SYS_EXIT, uintptr(code), 0, 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func readv(fd int, iovs []Iovec) (n int, err error) {
	var _p0 unsafe.Pointer
	if len(iovs) > 0 {
		_p0 = unsafe.Pointer(&iovs[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	_HIDIOCGRAWPHYS                  = 0x40404805
	_HIDIOCGRAWUNIQ                  = 0x40404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x7d)
	EADDRNOTAVAIL   = syscall.Errno(0x7e)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x7c)
	EALREADY        = syscall.Errno(0x95)
	EBADE           = syscall.Errno(0x32)
	EBADFD          = syscall.Errno(0x51)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x40404805
	_HIDIOCGRAWUNIQ                  = 0x40404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x7d)
	EADDRNOTAVAIL   = syscall.Errno(0x7e)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x7c)
	EALREADY        = syscall.Errno(0x95)
	EBADE           = syscall.Errno(0x32)
	EBADFD          = syscall.Errno(0x51)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x40404805
	_HIDIOCGRAWUNIQ                  = 0x40404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)