UTF-8-encoded string: Rust parsing library

// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

#![allow(unused_imports)]
#![allow(non_snake_case)]
#![allow(non_camel_case_types)]
#![allow(irrefutable_let_patterns)]
#![allow(unused_comparisons)]

extern crate kaitai;
use kaitai::*;
use std::convert::{TryFrom, TryInto};
use std::cell::{Ref, Cell, RefCell};
use std::rc::{Rc, Weak};

/**
 * UTF-8 is a popular character encoding scheme that allows to
 * represent strings as sequence of code points defined in Unicode
 * standard. Its features are:
 * 
 * * variable width (i.e. one code point might be represented by 1 to 4
 *   bytes)
 * * backward compatiblity with ASCII
 * * basic validity checking (and thus distinguishing from other legacy
 *   8-bit encodings)
 * * maintaining sort order of codepoints if sorted as a byte array
 * 
 * WARNING: For the vast majority of practical purposes of format
 * definitions in Kaitai Struct, you'd likely NOT want to use this and
 * rather just use `type: str` with `encoding: utf-8`. That will use
 * native string implementations, which are most likely more efficient
 * and will give you native language strings, rather than an array of
 * individual codepoints.  This format definition is provided mostly
 * for educational / research purposes.
 */

#[derive(Default, Debug, Clone)]
pub struct Utf8String {
    pub _root: SharedType<Utf8String>,
    pub _parent: SharedType<Utf8String>,
    pub _self: SharedType<Self>,
    codepoints: RefCell<Vec<OptRc<Utf8String_Utf8Codepoint>>>,
    _io: RefCell<BytesReader>,
}
impl KStruct for Utf8String {
    type Root = Utf8String;
    type Parent = Utf8String;

    fn read<S: KStream>(
        self_rc: &OptRc<Self>,
        _io: &S,
        _root: SharedType<Self::Root>,
        _parent: SharedType<Self::Parent>,
    ) -> KResult<()> {
        *self_rc._io.borrow_mut() = _io.clone();
        self_rc._root.set(_root.get());
        self_rc._parent.set(_parent.get());
        self_rc._self.set(Ok(self_rc.clone()));
        let _rrc = self_rc._root.get_value().borrow().upgrade();
        let _prc = self_rc._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        *self_rc.codepoints.borrow_mut() = Vec::new();
        {
            let mut _i = 0;
            while !_io.is_eof() {
                let f = |t : &mut Utf8String_Utf8Codepoint| Ok(t.set_params((_io.pos()).try_into().map_err(|_| KError::CastError)?));
                let t = Self::read_into_with_init::<_, Utf8String_Utf8Codepoint>(&*_io, Some(self_rc._root.clone()), Some(self_rc._self.clone()), &f)?.into();
                self_rc.codepoints.borrow_mut().push(t);
                _i += 1;
            }
        }
        Ok(())
    }
}
impl Utf8String {
}
impl Utf8String {
    pub fn codepoints(&self) -> Ref<'_, Vec<OptRc<Utf8String_Utf8Codepoint>>> {
        self.codepoints.borrow()
    }
}
impl Utf8String {
    pub fn _io(&self) -> Ref<'_, BytesReader> {
        self._io.borrow()
    }
}

#[derive(Default, Debug, Clone)]
pub struct Utf8String_Utf8Codepoint {
    pub _root: SharedType<Utf8String>,
    pub _parent: SharedType<Utf8String>,
    pub _self: SharedType<Self>,
    ofs: RefCell<u64>,
    bytes: RefCell<Vec<u8>>,
    _io: RefCell<BytesReader>,
    f_byte0: Cell<bool>,
    byte0: RefCell<u8>,
    f_len_bytes: Cell<bool>,
    len_bytes: RefCell<i32>,
    f_raw0: Cell<bool>,
    raw0: RefCell<i32>,
    f_raw1: Cell<bool>,
    raw1: RefCell<i32>,
    f_raw2: Cell<bool>,
    raw2: RefCell<i32>,
    f_raw3: Cell<bool>,
    raw3: RefCell<i32>,
    f_value_as_int: Cell<bool>,
    value_as_int: RefCell<i32>,
}
impl KStruct for Utf8String_Utf8Codepoint {
    type Root = Utf8String;
    type Parent = Utf8String;

    fn read<S: KStream>(
        self_rc: &OptRc<Self>,
        _io: &S,
        _root: SharedType<Self::Root>,
        _parent: SharedType<Self::Parent>,
    ) -> KResult<()> {
        *self_rc._io.borrow_mut() = _io.clone();
        self_rc._root.set(_root.get());
        self_rc._parent.set(_parent.get());
        self_rc._self.set(Ok(self_rc.clone()));
        let _rrc = self_rc._root.get_value().borrow().upgrade();
        let _prc = self_rc._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        *self_rc.bytes.borrow_mut() = _io.read_bytes(*self_rc.len_bytes()? as usize)?.into();
        Ok(())
    }
}
impl Utf8String_Utf8Codepoint {
    pub fn ofs(&self) -> Ref<'_, u64> {
        self.ofs.borrow()
    }
}
impl Utf8String_Utf8Codepoint {
    pub fn set_params(&mut self, ofs: u64) {
        *self.ofs.borrow_mut() = ofs;
    }
}
impl Utf8String_Utf8Codepoint {
    pub fn byte0(
        &self
    ) -> KResult<Ref<'_, u8>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_byte0.get() {
            return Ok(self.byte0.borrow());
        }
        self.f_byte0.set(true);
        let _pos = _io.pos();
        _io.seek(*self.ofs() as usize)?;
        *self.byte0.borrow_mut() = _io.read_u1()?.into();
        _io.seek(_pos)?;
        Ok(self.byte0.borrow())
    }
    pub fn len_bytes(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_len_bytes.get() {
            return Ok(self.len_bytes.borrow());
        }
        self.f_len_bytes.set(true);
        *self.len_bytes.borrow_mut() = (if ((((*self.byte0()? as u8) & (128 as u8)) as i32) == (0 as i32)) { 1 } else { if ((((*self.byte0()? as u8) & (224 as u8)) as i32) == (192 as i32)) { 2 } else { if ((((*self.byte0()? as u8) & (240 as u8)) as i32) == (224 as i32)) { 3 } else { if ((((*self.byte0()? as u8) & (248 as u8)) as i32) == (240 as i32)) { 4 } else { -1 } } } }) as i32;
        Ok(self.len_bytes.borrow())
    }
    pub fn raw0(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_raw0.get() {
            return Ok(self.raw0.borrow());
        }
        self.f_raw0.set(true);
        *self.raw0.borrow_mut() = (((self.bytes()[0 as usize] as u8) & (if ((*self.len_bytes()? as i32) == (1 as i32)) { 127 } else { if ((*self.len_bytes()? as i32) == (2 as i32)) { 31 } else { if ((*self.len_bytes()? as i32) == (3 as i32)) { 15 } else { if ((*self.len_bytes()? as i32) == (4 as i32)) { 7 } else { 0 } } } } as u8))) as i32;
        Ok(self.raw0.borrow())
    }
    pub fn raw1(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_raw1.get() {
            return Ok(self.raw1.borrow());
        }
        self.f_raw1.set(true);
        if ((*self.len_bytes()? as i32) >= (2 as i32)) {
            *self.raw1.borrow_mut() = (((self.bytes()[1 as usize] as u8) & (63 as u8))) as i32;
        }
        Ok(self.raw1.borrow())
    }
    pub fn raw2(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_raw2.get() {
            return Ok(self.raw2.borrow());
        }
        self.f_raw2.set(true);
        if ((*self.len_bytes()? as i32) >= (3 as i32)) {
            *self.raw2.borrow_mut() = (((self.bytes()[2 as usize] as u8) & (63 as u8))) as i32;
        }
        Ok(self.raw2.borrow())
    }
    pub fn raw3(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_raw3.get() {
            return Ok(self.raw3.borrow());
        }
        self.f_raw3.set(true);
        if ((*self.len_bytes()? as i32) >= (4 as i32)) {
            *self.raw3.borrow_mut() = (((self.bytes()[3 as usize] as u8) & (63 as u8))) as i32;
        }
        Ok(self.raw3.borrow())
    }
    pub fn value_as_int(
        &self
    ) -> KResult<Ref<'_, i32>> {
        let _io = self._io.borrow();
        let _rrc = self._root.get_value().borrow().upgrade();
        let _prc = self._parent.get_value().borrow().upgrade();
        let _r = _rrc.as_ref().unwrap();
        if self.f_value_as_int.get() {
            return Ok(self.value_as_int.borrow());
        }
        self.f_value_as_int.set(true);
        *self.value_as_int.borrow_mut() = (if ((*self.len_bytes()? as i32) == (1 as i32)) { *self.raw0()? } else { if ((*self.len_bytes()? as i32) == (2 as i32)) { ((((*self.raw0()? as i32) << (6 as i32)) as i32) | (*self.raw1()? as i32)) } else { if ((*self.len_bytes()? as i32) == (3 as i32)) { ((((((*self.raw0()? as i32) << (12 as i32)) as i32) | (((*self.raw1()? as i32) << (6 as i32)) as i32)) as i32) | (*self.raw2()? as i32)) } else { if ((*self.len_bytes()? as i32) == (4 as i32)) { ((((((((*self.raw0()? as i32) << (18 as i32)) as i32) | (((*self.raw1()? as i32) << (12 as i32)) as i32)) as i32) | (((*self.raw2()? as i32) << (6 as i32)) as i32)) as i32) | (*self.raw3()? as i32)) } else { -1 } } } }) as i32;
        Ok(self.value_as_int.borrow())
    }
}
impl Utf8String_Utf8Codepoint {
    pub fn bytes(&self) -> Ref<'_, Vec<u8>> {
        self.bytes.borrow()
    }
}
impl Utf8String_Utf8Codepoint {
    pub fn _io(&self) -> Ref<'_, BytesReader> {
        self._io.borrow()
    }
}