YANG: trivial rust implementation of show memory

yang/rust/.gitignore

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+Cargo.lock
+target/

yang/rust/Cargo.toml

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+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = "1.0.196"
+serde_cbor = "0.11.2"
+serde_derive = "1.0.196"

yang/rust/src/main.rs

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+use std::env;
+use std::fs::File;
+use serde_derive::Deserialize;
+
+#[derive(Debug, Deserialize)]
+struct Memory {
+    effective: u32,
+    overhead: u32,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemoryBody {
+    routing_tables: Memory,
+    route_attributes: Memory,
+    protocols: Memory,
+    current_config: Memory,
+    standby_memory: Memory,
+    total: Memory,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemory {
+    header: String,
+    body: ShowMemoryBody,
+}
+
+#[derive(Debug, Deserialize)]
+struct ShowMemoryMessage {
+    /* serde does not support prefix, so we use rename work-around */
+    #[serde(rename(deserialize = "show_memory:message"))]
+    message: ShowMemory,
+
+    /* for prefixing both Serializator and Deserializator, use:
+      #[serde(rename(serialize = "show_memory:message", deserialize = "show_memory:mesage"))]
+     */
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() < 2 {
+	println!("Usage: ./program {{show-memory-cbor-file}}");
+	return;
+    }
+
+    let mut file = File::open(&args[1]);
+
+    if file.is_err() {
+	println!("Error during openning file {} occured!", args[1].clone());
+	return;
+    }
+
+    let rep : Result<ShowMemoryMessage, _> = serde_cbor::from_reader(file.unwrap());
+    if let Ok(report) = rep {
+	println!("{:?}", report);
+    } else {
+	let err = rep.err().unwrap();
+	println!("Error {}", err);
+    }
+}