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    0x59, 0x35, 0x1c, 0x9b, 0x07, 0xf5, 0x15, 0x0a, 0x5b, 0xd7, 0x3c, 0xae, 0x88, 0x9d, 0xf1, 0xac,
8    0xd1, 0x69, 0x1d, 0x79, 0x62, 0x11, 0x77, 0x63, 0xd2, 0x64, 0x76, 0x8f, 0xbd, 0x8c, 0xe6, 0x45,
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    pub prefetch: bool,
15}
16impl Config {
17    #[doc = r" Take the config startup handle and parse its contents."]
18    #[doc = r""]
19    #[doc = r" # Panics"]
20    #[doc = r""]
21    #[doc = r" If the config startup handle was already taken or if it is not valid."]
22    pub fn take_from_startup_handle() -> Self {
23        <Self as ComponentConfig>::take_from_startup_handle()
24    }
25    #[doc = r" Parse `Self` from `vmo`."]
26    pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
27        <Self as ComponentConfig>::from_vmo(vmo)
28    }
29    #[doc = r" Parse `Self` from `bytes`."]
30    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
31        <Self as ComponentConfig>::from_bytes(bytes)
32    }
33    pub fn record_inspect(&self, inspector_node: &Node) {
34        <Self as ComponentConfig>::record_inspect(self, inspector_node)
35    }
36}
37impl ComponentConfig for Config {
38    #[doc = r" Parse `Self` from `bytes`."]
39    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
40        let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
41        let checksum_len_bytes: [u8; 2] =
42            checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
43        let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
44        let (observed_checksum, bytes) =
45            bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
46        if observed_checksum != EXPECTED_CHECKSUM {
47            return Err(Error::ChecksumMismatch {
48                expected_checksum: EXPECTED_CHECKSUM.to_vec(),
49                observed_checksum: observed_checksum.to_vec(),
50            });
51        }
52        let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
53        Ok(Self { extra_features: fidl_config.extra_features, prefetch: fidl_config.prefetch })
54    }
55    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
56        let fidl_config = FidlConfig {
57            extra_features: self.extra_features.clone(),
58            prefetch: self.prefetch.clone(),
59        };
60        let mut fidl_bytes = fidl::persist(&fidl_config).map_err(Error::Persist)?;
61        let mut bytes = Vec::with_capacity(
62            EXPECTED_CHECKSUM_LENGTH.len() + EXPECTED_CHECKSUM.len() + fidl_bytes.len(),
63        );
64        bytes.extend_from_slice(&EXPECTED_CHECKSUM_LENGTH);
65        bytes.extend_from_slice(EXPECTED_CHECKSUM);
66        bytes.append(&mut fidl_bytes);
67        Ok(bytes)
68    }
69    fn record_inspect(&self, inspector_node: &Node) {
70        let arr = inspector_node.create_string_array("extra_features", self.extra_features.len());
71        for i in 0..self.extra_features.len() {
72            arr.set(i, &self.extra_features[i]);
73        }
74        inspector_node.record(arr);
75        inspector_node.record_bool("prefetch", self.prefetch);
76    }
77}
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
