bp3d_proto/codec/
arrays.rs

1// Copyright (c) 2024, BlockProject 3D
2//
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4//
5// Redistribution and use in source and binary forms, with or without modification,
6// are permitted provided that the following conditions are met:
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10//     * Redistributions in binary form must reproduce the above copyright notice,
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14//       may be used to endorse or promote products derived from this software
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17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29use crate::codec::ByteCodec;
30use bytesutil::{ReadBytes, WriteBytes};
31use std::marker::PhantomData;
32
33pub struct ArrayCodec<B, Item, C, const ITEM_BIT_SIZE: usize> {
34    buffer: B,
35    useless: PhantomData<Item>,
36    useless1: PhantomData<C>,
37}
38
39impl<B, Item, C, const ITEM_BIT_SIZE: usize> ArrayCodec<B, Item, C, ITEM_BIT_SIZE> {
40    pub fn new(buffer: B) -> Self {
41        Self {
42            buffer,
43            useless: PhantomData,
44            useless1: PhantomData,
45        }
46    }
47}
48
49impl<B: AsRef<[u8]>, Item: ReadBytes, C: ByteCodec, const ITEM_BIT_SIZE: usize> ArrayCodec<B, Item, C, ITEM_BIT_SIZE> {
50    pub fn get(&self, index: usize) -> Item {
51        let byte_size = ITEM_BIT_SIZE / 8;
52        let pos = index * byte_size;
53        let end = pos + byte_size;
54        C::read::<Item>(&self.buffer.as_ref()[pos..end])
55    }
56
57    pub fn len(&self) -> usize {
58        let byte_size = ITEM_BIT_SIZE / 8;
59        self.buffer.as_ref().len() / byte_size
60    }
61
62    pub fn is_empty(&self) -> bool {
63        self.len() == 0
64    }
65
66    pub fn iter_raw(&self) -> impl Iterator<Item = Item> + '_ {
67        let byte_size = ITEM_BIT_SIZE / 8;
68        self.buffer.as_ref().chunks(byte_size).map(|v| C::read::<Item>(v))
69    }
70}
71
72impl<B: AsMut<[u8]>, Item: WriteBytes, C: ByteCodec, const ITEM_BIT_SIZE: usize> ArrayCodec<B, Item, C, ITEM_BIT_SIZE> {
73    pub fn set(&mut self, index: usize, value: Item) -> &mut Self {
74        let byte_size = ITEM_BIT_SIZE / 8;
75        let pos = index * byte_size;
76        let end = pos + byte_size;
77        C::write::<Item>(&mut self.buffer.as_mut()[pos..end], value);
78        self
79    }
80}
81
82impl<B: AsMut<[u8]>, C> AsMut<[u8]> for ArrayCodec<B, u8, C, 8> {
83    fn as_mut(&mut self) -> &mut [u8] {
84        self.buffer.as_mut()
85    }
86}
87
88impl<B: AsRef<[u8]>, C> AsRef<[u8]> for ArrayCodec<B, u8, C, 8> {
89    fn as_ref(&self) -> &[u8] {
90        self.buffer.as_ref()
91    }
92}
bp3d_proto/codec/arrays.rs

bp3d_proto/codec/
arrays.rs
