func (p *Process) ReadableN(a Address, n int64) bool {
	for {
		m := p.findMapping(a)
		if m == nil || m.perm&Read == 0 {
			return false
		}
		c := m.max.Sub(a)
		if n <= c {
			return true
		}
		n -= c
		a = a.Add(c)
	}
}
func (p *Process) ReadableN(a Address, n int64) bool {
	for {
		m := p.findMapping(a)
		if m == nil || m.perm&Read == 0 {
			return false
		}
		c := m.max.Sub(a)
		if n <= c {
			return true
		}
		n -= c
		a = a.Add(c)
	}
}
func ( p * Process ) ReadableN ( a Address , n int64 ) bool { for { m := p . findMapping ( a ) if m == nil || m . perm & Read == 0 { return false } c := m . max . Sub ( a ) if n <= c { return true } n -= c a = a . Add ( c ) } }
// ReadableN reports whether the n bytes starting at address a are readable.
ReadableN reports whether the n bytes starting at address a are readable .