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use std::cmp::Ordering;
use std::fmt;
use std::num::NonZeroU128;
use std::ops::Deref;
use std::str::FromStr;
use crate::Error;
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
#[repr(transparent)]
pub struct TinyStr16(NonZeroU128);
impl TinyStr16 {
#[inline(always)]
pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
tinystr_raw::try_u128_from_bytes(bytes).map(Self)
}
#[inline(always)]
pub const unsafe fn new_unchecked(text: u128) -> Self {
Self(NonZeroU128::new_unchecked(u128::from_le(text)))
}
#[inline(always)]
pub fn as_str(&self) -> &str {
self.deref()
}
pub const fn as_unsigned(&self) -> u128 {
self.0.get()
}
pub const fn is_ascii_alphabetic(self) -> bool {
let word = self.0.get();
let mask = (word + 0x7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f)
& 0x8080_8080_8080_8080_8080_8080_8080_8080;
let lower = word | 0x2020_2020_2020_2020_2020_2020_2020_2020;
let alpha = !(lower + 0x1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f)
| (lower + 0x0505_0505_0505_0505_0505_0505_0505_0505);
(alpha & mask) == 0
}
pub const fn is_ascii_alphanumeric(self) -> bool {
let word = self.0.get();
let mask = (word + 0x7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f)
& 0x8080_8080_8080_8080_8080_8080_8080_8080;
let numeric = !(word + 0x5050_5050_5050_5050_5050_5050_5050_5050)
| (word + 0x4646_4646_4646_4646_4646_4646_4646_4646);
let lower = word | 0x2020_2020_2020_2020_2020_2020_2020_2020;
let alpha = !(lower + 0x1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f)
| (lower + 0x0505_0505_0505_0505_0505_0505_0505_0505);
(alpha & numeric & mask) == 0
}
pub const fn is_ascii_numeric(self) -> bool {
let word = self.0.get();
let mask = (word + 0x7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f_7f7f)
& 0x8080_8080_8080_8080_8080_8080_8080_8080;
let numeric = !(word + 0x5050_5050_5050_5050_5050_5050_5050_5050)
| (word + 0x4646_4646_4646_4646_4646_4646_4646_4646);
(numeric & mask) == 0
}
pub const fn to_ascii_lowercase(self) -> Self {
let word = self.0.get();
let result = word
| (((word + 0x3f3f_3f3f_3f3f_3f3f_3f3f_3f3f_3f3f_3f3f)
& !(word + 0x2525_2525_2525_2525_2525_2525_2525_2525)
& 0x8080_8080_8080_8080_8080_8080_8080_8080)
>> 2);
unsafe { Self(NonZeroU128::new_unchecked(result)) }
}
pub const fn to_ascii_titlecase(self) -> Self {
let word = self.0.get().to_le();
let mask = ((word + 0x3f3f_3f3f_3f3f_3f3f_3f3f_3f3f_3f3f_3f1f)
& !(word + 0x2525_2525_2525_2525_2525_2525_2525_2505)
& 0x8080_8080_8080_8080_8080_8080_8080_8080)
>> 2;
let result = (word | mask) & !(0x20 & mask);
unsafe { Self(NonZeroU128::new_unchecked(u128::from_le(result))) }
}
pub const fn to_ascii_uppercase(self) -> Self {
let word = self.0.get();
let result = word
& !(((word + 0x1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f_1f1f)
& !(word + 0x0505_0505_0505_0505_0505_0505_0505_0505)
& 0x8080_8080_8080_8080_8080_8080_8080_8080)
>> 2);
unsafe { Self(NonZeroU128::new_unchecked(result)) }
}
}
impl fmt::Display for TinyStr16 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.deref())
}
}
impl fmt::Debug for TinyStr16 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", self.deref())
}
}
impl Deref for TinyStr16 {
type Target = str;
#[inline(always)]
fn deref(&self) -> &str {
let word = self.0.get().to_le();
let len = (16 - word.leading_zeros() / 8) as usize;
unsafe {
let slice = core::slice::from_raw_parts(&self.0 as *const _ as *const u8, len);
std::str::from_utf8_unchecked(slice)
}
}
}
impl PartialEq<&str> for TinyStr16 {
fn eq(&self, other: &&str) -> bool {
self.deref() == *other
}
}
impl PartialOrd for TinyStr16 {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for TinyStr16 {
fn cmp(&self, other: &Self) -> Ordering {
self.0.get().to_be().cmp(&other.0.get().to_be())
}
}
impl FromStr for TinyStr16 {
type Err = Error;
#[inline(always)]
fn from_str(text: &str) -> Result<Self, Self::Err> {
Self::from_bytes(text.as_bytes())
}
}
impl From<TinyStr16> for u128 {
fn from(input: TinyStr16) -> Self {
input.0.get().to_le()
}
}
serde_impl!(TinyStr16, u128);