config_lib/
config_lib_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_configlib::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    0x1e, 0x2c, 0x8c, 0x11, 0x78, 0x21, 0x1b, 0xf4, 0x53, 0xba, 0x24, 0x7c, 0x85, 0xfa, 0x38, 0x87,
8    0xf2, 0xcc, 0x60, 0x5d, 0xdb, 0xba, 0x3d, 0xe6, 0x07, 0x44, 0xa1, 0x0e, 0x17, 0xa6, 0x12, 0x97,
9];
10const EXPECTED_CHECKSUM_LENGTH: [u8; 2] = (EXPECTED_CHECKSUM.len() as u16).to_le_bytes();
11#[derive(Debug)]
12pub struct Config {
13    pub echo_bool: bool,
14    pub echo_num: u64,
15    pub echo_string: String,
16    pub echo_string_vector: Vec<String>,
17}
18impl Config {
19    #[doc = r" Take the config startup handle and parse its contents."]
20    #[doc = r""]
21    #[doc = r" # Panics"]
22    #[doc = r""]
23    #[doc = r" If the config startup handle was already taken or if it is not valid."]
24    pub fn take_from_startup_handle() -> Self {
25        <Self as ComponentConfig>::take_from_startup_handle()
26    }
27    #[doc = r" Parse `Self` from `vmo`."]
28    pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
29        <Self as ComponentConfig>::from_vmo(vmo)
30    }
31    #[doc = r" Parse `Self` from `bytes`."]
32    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
33        <Self as ComponentConfig>::from_bytes(bytes)
34    }
35    pub fn record_inspect(&self, inspector_node: &Node) {
36        <Self as ComponentConfig>::record_inspect(self, inspector_node)
37    }
38}
39impl ComponentConfig for Config {
40    #[doc = r" Parse `Self` from `bytes`."]
41    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
42        let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
43        let checksum_len_bytes: [u8; 2] =
44            checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
45        let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
46        let (observed_checksum, bytes) =
47            bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
48        if observed_checksum != EXPECTED_CHECKSUM {
49            return Err(Error::ChecksumMismatch {
50                expected_checksum: EXPECTED_CHECKSUM.to_vec(),
51                observed_checksum: observed_checksum.to_vec(),
52            });
53        }
54        let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
55        Ok(Self {
56            echo_bool: fidl_config.echo_bool,
57            echo_num: fidl_config.echo_num,
58            echo_string: fidl_config.echo_string,
59            echo_string_vector: fidl_config.echo_string_vector,
60        })
61    }
62    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
63        let fidl_config = FidlConfig {
64            echo_bool: self.echo_bool.clone(),
65            echo_num: self.echo_num.clone(),
66            echo_string: self.echo_string.clone(),
67            echo_string_vector: self.echo_string_vector.clone(),
68        };
69        let mut fidl_bytes = fidl::persist(&fidl_config).map_err(Error::Persist)?;
70        let mut bytes = Vec::with_capacity(
71            EXPECTED_CHECKSUM_LENGTH.len() + EXPECTED_CHECKSUM.len() + fidl_bytes.len(),
72        );
73        bytes.extend_from_slice(&EXPECTED_CHECKSUM_LENGTH);
74        bytes.extend_from_slice(EXPECTED_CHECKSUM);
75        bytes.append(&mut fidl_bytes);
76        Ok(bytes)
77    }
78    fn record_inspect(&self, inspector_node: &Node) {
79        inspector_node.record_bool("echo_bool", self.echo_bool);
80        inspector_node.record_uint("echo_num", self.echo_num);
81        inspector_node.record_string("echo_string", &self.echo_string);
82        let arr =
83            inspector_node.create_string_array("echo_string_vector", self.echo_string_vector.len());
84        for i in 0..self.echo_string_vector.len() {
85            arr.set(i, &self.echo_string_vector[i]);
86        }
87        inspector_node.record(arr);
88    }
89}
config_lib/config_lib_rust_config_lib_source.rs

config_lib/
config_lib_rust_config_lib_source.rs
