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#![no_std]
#![forbid(unsafe_code)]
#[cfg(feature = "list")]
extern crate serde;
#[cfg(feature = "list")]
#[macro_use]
extern crate psl_codegen;
#[cfg(feature = "list")]
mod list;
mod trait_impls;
use core::str;
#[cfg(feature = "list")]
pub use list::List;
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub enum Type {
Icann,
Private,
}
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub struct Info {
pub len: usize,
pub typ: Option<Type>,
}
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub struct Suffix<'a> {
bytes: &'a [u8],
typ: Option<Type>,
}
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub struct Domain<'a> {
bytes: &'a [u8],
suffix: Suffix<'a>,
}
pub trait Psl {
fn find(&self, domain: &[u8]) -> Info;
#[inline]
fn suffix<'a>(&self, domain: &'a str) -> Option<Suffix<'a>> {
let domain = domain.as_bytes();
let Info { len, typ } = self.find(domain);
if len == 0 {
return None;
}
let offset = domain.len() - len;
let bytes = &domain[offset..];
Some(Suffix { bytes, typ })
}
#[inline]
fn domain<'a>(&self, domain: &'a str) -> Option<Domain<'a>> {
let suffix = self.suffix(domain)?;
let domain = domain.as_bytes();
let domain_len = domain.len();
let suffix_len = suffix.bytes.len();
if domain_len < suffix_len + 2 {
return None;
}
let offset = domain_len - (1 + suffix_len);
let subdomain = &domain[..offset];
let root_label = subdomain.rsplitn(2, |x| *x == b'.').next()?;
let registrable_len = root_label.len() + 1 + suffix_len;
let offset = domain_len - registrable_len;
let bytes = &domain[offset..];
Some(Domain { bytes, suffix })
}
}
impl<'a> Suffix<'a> {
#[inline]
pub fn as_bytes(&self) -> &[u8] {
&self.bytes
}
#[inline]
pub fn to_str(&self) -> &str {
str::from_utf8(&self.bytes).unwrap()
}
#[inline]
pub fn typ(&self) -> Option<Type> {
self.typ
}
#[inline]
pub fn is_known(&self) -> bool {
self.typ.is_some()
}
}
impl<'a> Domain<'a> {
#[inline]
pub fn as_bytes(&self) -> &[u8] {
&self.bytes
}
#[inline]
pub fn to_str(&self) -> &str {
str::from_utf8(&self.bytes).unwrap()
}
#[inline]
pub fn suffix(&self) -> Suffix<'a> {
self.suffix
}
}