example_config/
example_config_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_exampleconfig::Config as FidlConfig;
3use fuchsia_component_config::{Config as ComponentConfig, Error};
4use fuchsia_inspect::Node;
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7    0xff, 0x80, 0x66, 0xec, 0x7f, 0x4b, 0xf7, 0x3e, 0xa2, 0xa7, 0xce, 0xae, 0xaa, 0x11, 0x41, 0x73,
8    0xee, 0x0f, 0x44, 0xb1, 0x7d, 0x61, 0xca, 0xcd, 0xd3, 0x76, 0x77, 0x90, 0xc5, 0x1e, 0x6d, 0xbf,
9];
10#[derive(Debug)]
11pub struct Config {
12    pub greeting: String,
13}
14impl Config {
15    #[doc = r" Take the config startup handle and parse its contents."]
16    #[doc = r""]
17    #[doc = r" # Panics"]
18    #[doc = r""]
19    #[doc = r" If the config startup handle was already taken or if it is not valid."]
20    pub fn take_from_startup_handle() -> Self {
21        <Self as ComponentConfig>::take_from_startup_handle()
22    }
23    #[doc = r" Parse `Self` from `vmo`."]
24    pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
25        <Self as ComponentConfig>::from_vmo(vmo)
26    }
27    #[doc = r" Parse `Self` from `bytes`."]
28    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
29        <Self as ComponentConfig>::from_bytes(bytes)
30    }
31    pub fn record_inspect(&self, inspector_node: &Node) {
32        <Self as ComponentConfig>::record_inspect(self, inspector_node)
33    }
34}
35impl ComponentConfig for Config {
36    #[doc = r" Parse `Self` from `bytes`."]
37    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
38        let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
39        let checksum_len_bytes: [u8; 2] =
40            checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
41        let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
42        let (observed_checksum, bytes) =
43            bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
44        if observed_checksum != EXPECTED_CHECKSUM {
45            return Err(Error::ChecksumMismatch {
46                expected_checksum: EXPECTED_CHECKSUM.to_vec(),
47                observed_checksum: observed_checksum.to_vec(),
48            });
49        }
50        let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
51        Ok(Self { greeting: fidl_config.greeting })
52    }
53    fn record_inspect(&self, inspector_node: &Node) {
54        inspector_node.record_string("greeting", &self.greeting);
55    }
56}
example_config/example_config_rust_config_lib_source.rs

example_config/
example_config_rust_config_lib_source.rs
