hadris_common/types/
file.rs

1use core::{fmt, ops::Range};
2
3/// A Fixed-Length Filename
4#[derive(Clone, Copy, PartialEq, Eq)]
5pub struct FixedFilename<const N: usize> {
6    pub data: [u8; N],
7    pub len: usize,
8}
9
10impl<const N: usize> FixedFilename<N> {
11    pub const fn empty() -> Self {
12        Self {
13            data: [0; N],
14            len: 0,
15        }
16    }
17
18    pub const fn with_size(size: usize) -> Self {
19        Self {
20            data: [0; N],
21            len: size,
22        }
23    }
24
25    pub fn as_str(&self) -> &str {
26        unsafe { core::str::from_utf8_unchecked(self.as_bytes()) }
27    }
28
29    pub fn allocate(&mut self, bytes: usize) {
30        let len = self.len;
31        assert!(bytes + len < N);
32        self.len += bytes;
33        //self.data[len..self.len]
34    }
35
36    pub fn as_bytes(&self) -> &[u8] {
37        &self.data[0..self.len]
38    }
39
40    pub fn as_bytes_mut(&mut self) -> &mut [u8] {
41        &mut self.data[0..self.len]
42    }
43
44    pub fn truncate(&mut self, new_size: usize) {
45        assert!(new_size <= N);
46        self.len = new_size;
47    }
48
49    pub fn len(&self) -> usize {
50        self.len
51    }
52
53    pub fn push_slice(&mut self, slice: &[u8]) -> Range<usize> {
54        assert!(self.len + slice.len() <= self.data.len());
55        let start = self.len;
56        self.len += slice.len();
57        self.data[start..self.len].copy_from_slice(slice);
58        start..self.len
59    }
60
61    pub fn push_byte(&mut self, b: u8) -> usize {
62        self.data[self.len] = b;
63        self.len += 1;
64        self.len - 1
65    }
66}
67
68impl<const N: usize> fmt::Debug for FixedFilename<N> {
69    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
70        f.debug_tuple("FixedFilename")
71            .field(&self.as_str())
72            .finish()
73    }
74}
75
76impl<const N: usize> From<&[u8]> for FixedFilename<N> {
77    fn from(value: &[u8]) -> Self {
78        assert!(value.len() <= N);
79        let mut str = FixedFilename::with_size(value.len());
80        str.data[0..value.len()].copy_from_slice(value);
81        return str;
82    }
83}
hadris_common/types/file.rs

hadris_common/types/
file.rs
