counter_config/
config_lib_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_counterconfig::Config as FidlConfig;
3use fuchsia_component_config::{Config as ComponentConfig, Error};
4use fuchsia_inspect::Node;
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7    0x8c, 0x34, 0x33, 0xab, 0x56, 0x0b, 0xac, 0xac, 0x14, 0x25, 0x4f, 0x40, 0xdf, 0x8e, 0x3d, 0x6a,
8    0x6d, 0x4d, 0xbb, 0x21, 0x16, 0xdf, 0x2b, 0x49, 0x49, 0xc0, 0x6a, 0x44, 0x08, 0x94, 0x27, 0xae,
9];
10const EXPECTED_CHECKSUM_LENGTH: [u8; 2] = (EXPECTED_CHECKSUM.len() as u16).to_le_bytes();
11#[derive(Debug)]
12pub struct Config {
13    pub routed_config: bool,
14    pub starting_value: u32,
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 {
54            routed_config: fidl_config.routed_config,
55            starting_value: fidl_config.starting_value,
56        })
57    }
58    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
59        let fidl_config = FidlConfig {
60            routed_config: self.routed_config.clone(),
61            starting_value: self.starting_value.clone(),
62        };
63        let mut fidl_bytes = fidl::persist(&fidl_config).map_err(Error::Persist)?;
64        let mut bytes = Vec::with_capacity(
65            EXPECTED_CHECKSUM_LENGTH.len() + EXPECTED_CHECKSUM.len() + fidl_bytes.len(),
66        );
67        bytes.extend_from_slice(&EXPECTED_CHECKSUM_LENGTH);
68        bytes.extend_from_slice(EXPECTED_CHECKSUM);
69        bytes.append(&mut fidl_bytes);
70        Ok(bytes)
71    }
72    fn record_inspect(&self, inspector_node: &Node) {
73        inspector_node.record_bool("routed_config", self.routed_config);
74        inspector_node.record_uint("starting_value", self.starting_value as u64);
75    }
76}
counter_config/config_lib_rust_config_lib_source.rs

counter_config/
config_lib_rust_config_lib_source.rs
