starnix_kernel_structured_config/
starnix_kernel_structured_config_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_starnixkernelstructuredconfig::Config as FidlConfig;
3use fuchsia_component_config::{Config as ComponentConfig, Error};
4use fuchsia_inspect::{ArrayProperty, Node};
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7    0xf4, 0x72, 0xd7, 0xaa, 0x71, 0x90, 0x0a, 0x9f, 0x15, 0x2f, 0xea, 0x45, 0x2a, 0xd7, 0x34, 0xcb,
8    0xaf, 0xc4, 0xcd, 0x05, 0x19, 0x69, 0x12, 0x1f, 0xe9, 0x14, 0xdc, 0x23, 0xf2, 0xe3, 0x9b, 0x6e,
9];
10const EXPECTED_CHECKSUM_LENGTH: [u8; 2] = (EXPECTED_CHECKSUM.len() as u16).to_le_bytes();
11#[derive(Debug)]
12pub struct Config {
13    pub extra_features: Vec<String>,
14}
15impl Config {
16    #[doc = r" Take the config startup handle and parse its contents."]
17    #[doc = r""]
18    #[doc = r" # Panics"]
19    #[doc = r""]
20    #[doc = r" If the config startup handle was already taken or if it is not valid."]
21    pub fn take_from_startup_handle() -> Self {
22        <Self as ComponentConfig>::take_from_startup_handle()
23    }
24    #[doc = r" Parse `Self` from `vmo`."]
25    pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
26        <Self as ComponentConfig>::from_vmo(vmo)
27    }
28    #[doc = r" Parse `Self` from `bytes`."]
29    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
30        <Self as ComponentConfig>::from_bytes(bytes)
31    }
32    pub fn record_inspect(&self, inspector_node: &Node) {
33        <Self as ComponentConfig>::record_inspect(self, inspector_node)
34    }
35}
36impl ComponentConfig for Config {
37    #[doc = r" Parse `Self` from `bytes`."]
38    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
39        let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
40        let checksum_len_bytes: [u8; 2] =
41            checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
42        let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
43        let (observed_checksum, bytes) =
44            bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
45        if observed_checksum != EXPECTED_CHECKSUM {
46            return Err(Error::ChecksumMismatch {
47                expected_checksum: EXPECTED_CHECKSUM.to_vec(),
48                observed_checksum: observed_checksum.to_vec(),
49            });
50        }
51        let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
52        Ok(Self { extra_features: fidl_config.extra_features })
53    }
54    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
55        let fidl_config = FidlConfig { extra_features: self.extra_features.clone() };
56        let mut fidl_bytes = fidl::persist(&fidl_config).map_err(Error::Persist)?;
57        let mut bytes = Vec::with_capacity(
58            EXPECTED_CHECKSUM_LENGTH.len() + EXPECTED_CHECKSUM.len() + fidl_bytes.len(),
59        );
60        bytes.extend_from_slice(&EXPECTED_CHECKSUM_LENGTH);
61        bytes.extend_from_slice(EXPECTED_CHECKSUM);
62        bytes.append(&mut fidl_bytes);
63        Ok(bytes)
64    }
65    fn record_inspect(&self, inspector_node: &Node) {
66        let arr = inspector_node.create_string_array("extra_features", self.extra_features.len());
67        for i in 0..self.extra_features.len() {
68            arr.set(i, &self.extra_features[i]);
69        }
70        inspector_node.record(arr);
71    }
72}
starnix_kernel_structured_config/starnix_kernel_structured_config_rust_config_lib_source.rs

starnix_kernel_structured_config/
starnix_kernel_structured_config_rust_config_lib_source.rs
