use core::marker;
use crate::introspect;
use crate::private::layout::{
data_bits_per_element, ListBuilder, ListReader, PointerBuilder, PointerReader, PrimitiveElement,
};
use crate::traits::{FromPointerBuilder, FromPointerReader, IndexMove, ListIter};
use crate::Result;
#[derive(Clone, Copy)]
pub struct Owned<T> {
marker: marker::PhantomData<T>,
}
impl<T> introspect::Introspect for Owned<T>
where
T: introspect::Introspect,
{
fn introspect() -> introspect::Type {
introspect::Type::list_of(T::introspect())
}
}
impl<T> crate::traits::Owned for Owned<T>
where
T: PrimitiveElement + introspect::Introspect,
{
type Reader<'a> = Reader<'a, T>;
type Builder<'a> = Builder<'a, T>;
}
#[derive(Clone, Copy)]
pub struct Reader<'a, T>
where
T: PrimitiveElement,
{
marker: marker::PhantomData<T>,
reader: ListReader<'a>,
}
impl<'a, T: PrimitiveElement> Reader<'a, T> {
pub fn len(&self) -> u32 {
self.reader.len()
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn iter(self) -> ListIter<Reader<'a, T>, T> {
let l = self.len();
ListIter::new(self, l)
}
}
impl<'a, T: PrimitiveElement> FromPointerReader<'a> for Reader<'a, T> {
fn get_from_pointer(
reader: &PointerReader<'a>,
default: Option<&'a [crate::Word]>,
) -> Result<Reader<'a, T>> {
Ok(Reader {
reader: reader.get_list(T::element_size(), default)?,
marker: marker::PhantomData,
})
}
}
impl<'a, T: PrimitiveElement> IndexMove<u32, T> for Reader<'a, T> {
fn index_move(&self, index: u32) -> T {
self.get(index)
}
}
impl<'a, T: PrimitiveElement> Reader<'a, T> {
pub fn get(&self, index: u32) -> T {
assert!(index < self.len());
PrimitiveElement::get(&self.reader, index)
}
pub fn try_get(&self, index: u32) -> Option<T> {
if index < self.len() {
Some(PrimitiveElement::get(&self.reader, index))
} else {
None
}
}
#[cfg(target_endian = "little")]
pub fn as_slice(&self) -> Option<&[T]> {
if self.reader.get_element_size() == T::element_size() {
let bytes = self.reader.into_raw_bytes();
let bits_per_element = data_bits_per_element(T::element_size()) as usize;
let slice_length = if bits_per_element > 0 {
8 * bytes.len() / bits_per_element
} else {
self.len() as usize
};
Some(unsafe { core::slice::from_raw_parts(bytes.as_ptr() as *mut T, slice_length) })
} else {
None
}
}
}
impl<'a, T> crate::traits::IntoInternalListReader<'a> for Reader<'a, T>
where
T: PrimitiveElement,
{
fn into_internal_list_reader(self) -> ListReader<'a> {
self.reader
}
}
pub struct Builder<'a, T>
where
T: PrimitiveElement,
{
marker: marker::PhantomData<T>,
builder: ListBuilder<'a>,
}
impl<'a, T> Builder<'a, T>
where
T: PrimitiveElement,
{
pub fn len(&self) -> u32 {
self.builder.len()
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn into_reader(self) -> Reader<'a, T> {
Reader {
marker: marker::PhantomData,
reader: self.builder.into_reader(),
}
}
pub fn set(&mut self, index: u32, value: T) {
assert!(index < self.len());
PrimitiveElement::set(&self.builder, index, value);
}
#[cfg(target_endian = "little")]
pub fn as_slice(&mut self) -> Option<&mut [T]> {
if self.builder.get_element_size() == T::element_size() {
let bytes = self.builder.as_raw_bytes();
let bits_per_element = data_bits_per_element(T::element_size()) as usize;
let slice_length = if bits_per_element > 0 {
8 * bytes.len() / bits_per_element
} else {
self.len() as usize
};
Some(unsafe {
core::slice::from_raw_parts_mut(bytes.as_mut_ptr() as *mut T, slice_length)
})
} else {
None
}
}
}
impl<'a, T: PrimitiveElement> FromPointerBuilder<'a> for Builder<'a, T> {
fn init_pointer(builder: PointerBuilder<'a>, size: u32) -> Builder<'a, T> {
Builder {
builder: builder.init_list(T::element_size(), size),
marker: marker::PhantomData,
}
}
fn get_from_pointer(
builder: PointerBuilder<'a>,
default: Option<&'a [crate::Word]>,
) -> Result<Builder<'a, T>> {
Ok(Builder {
builder: builder.get_list(T::element_size(), default)?,
marker: marker::PhantomData,
})
}
}
impl<'a, T: PrimitiveElement> Builder<'a, T> {
pub fn get(&self, index: u32) -> T {
assert!(index < self.len());
PrimitiveElement::get_from_builder(&self.builder, index)
}
pub fn try_get(&self, index: u32) -> Option<T> {
if index < self.len() {
Some(PrimitiveElement::get_from_builder(&self.builder, index))
} else {
None
}
}
pub fn reborrow(&mut self) -> Builder<'_, T> {
Builder {
marker: marker::PhantomData,
builder: self.builder.reborrow(),
}
}
}
impl<'a, T> crate::traits::SetterInput<Owned<T>> for Reader<'a, T>
where
T: PrimitiveElement,
{
#[inline]
fn set_pointer_builder<'b>(
mut pointer: PointerBuilder<'b>,
value: Reader<'a, T>,
canonicalize: bool,
) -> Result<()> {
pointer.set_list(&value.reader, canonicalize)
}
}
impl<'a, T> crate::traits::SetterInput<Owned<T>> for &'a [T]
where
T: PrimitiveElement + Copy,
{
#[inline]
fn set_pointer_builder<'b>(
pointer: PointerBuilder<'b>,
value: &'a [T],
_canonicalize: bool,
) -> Result<()> {
let builder =
pointer.init_list(<T as PrimitiveElement>::element_size(), value.len() as u32);
for (idx, v) in value.iter().enumerate() {
PrimitiveElement::set(&builder, idx as u32, *v)
}
Ok(())
}
}
impl<'a, T, const N: usize> crate::traits::SetterInput<Owned<T>> for &'a [T; N]
where
T: PrimitiveElement + Copy,
{
#[inline]
fn set_pointer_builder<'b>(
pointer: PointerBuilder<'b>,
value: &'a [T; N],
canonicalize: bool,
) -> Result<()> {
crate::traits::SetterInput::set_pointer_builder(pointer, &value[..], canonicalize)
}
}
impl<'a, T> ::core::iter::IntoIterator for Reader<'a, T>
where
T: PrimitiveElement,
{
type Item = T;
type IntoIter = ListIter<Reader<'a, T>, Self::Item>;
fn into_iter(self) -> Self::IntoIter {
self.iter()
}
}
impl<'a, T: PrimitiveElement + crate::introspect::Introspect> From<Reader<'a, T>>
for crate::dynamic_value::Reader<'a>
{
fn from(t: Reader<'a, T>) -> crate::dynamic_value::Reader<'a> {
crate::dynamic_value::Reader::List(crate::dynamic_list::Reader::new(
t.reader,
T::introspect(),
))
}
}
impl<'a, T: PrimitiveElement + crate::introspect::Introspect> From<Builder<'a, T>>
for crate::dynamic_value::Builder<'a>
{
fn from(t: Builder<'a, T>) -> crate::dynamic_value::Builder<'a> {
crate::dynamic_value::Builder::List(crate::dynamic_list::Builder::new(
t.builder,
T::introspect(),
))
}
}
impl<'a, T: Copy + PrimitiveElement + crate::introspect::Introspect> core::fmt::Debug
for Reader<'a, T>
{
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
core::fmt::Debug::fmt(
&::core::convert::Into::<crate::dynamic_value::Reader<'_>>::into(*self),
f,
)
}
}