feat: add main4

__ffi/c_layout/Cargo.lock

@@ -1,5 +1,80 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "bincode"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f30d3a39baa26f9651f17b375061f3233dde33424a8b72b0dbe93a68a0bc896d"
+dependencies = [
+ "byteorder",
+ "serde",
+]
+
+[[package]]
+name = "byteorder"
+version = "1.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+
 [[package]]
 name = "c_layout"
 version = "0.1.0"
+dependencies = [
+ "bincode",
+ "serde",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b88fa983de7720629c9387e9f517353ed404164b1e482c970a90c1a4aaf7dc1a"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbd1ae72adb44aab48f325a02444a5fc079349a8d804c1fc922aed3f7454c74e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc371affeffc477f42a221a1e4297aedcea33d47d19b61455588bd9d8f6b19ac"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"

__ffi/c_layout/Cargo.toml

@@ -7,3 +7,5 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+serde = { version = "1.0", features = ["derive"] }
+bincode = "*"

__ffi/c_layout/src/main.rs

@@ -1,6 +1,7 @@
 mod main_1;
 mod main_2;
 mod main_3;
+mod main_4;
 
 fn main() {
     println!("{}", "-".repeat(88));
@@ -9,4 +10,6 @@ fn main() {
     main_2::run_main();
     println!("{}", "-".repeat(88));
     main_3::run_main();
+    println!("{}", "-".repeat(88));
+    main_4::run_main();
 }

__ffi/c_layout/src/main_3.rs

@@ -20,7 +20,7 @@ fn parse<P: AsRef<Path>>(path: P) -> Result<()> {
         unsafe { mem::transmute(h) }
     };
 
-    println!("{:#?}", header);
+    println!("{:?}", header);
     Ok(())
 }
 fn write<P: AsRef<Path>>(path: P, h: Header) -> Result<()> {

__ffi/c_layout/src/main_4.rs

@@ -0,0 +1,25 @@
+use std::mem;
+use std::io::Read;
+use serde::Deserialize;
+
+#[derive(Deserialize, Debug)]
+#[repr(C)]
+struct Header {
+    name: [u8; 4],
+    size: u32,
+    reserved: u64,
+}
+
+const HEADER: &[u8]= &[1, 2, 3, 4, 239, 205, 171, 0, 239, 205, 171, 137, 103, 69, 35, 1];
+
+pub fn run_main() {
+    let header: Header = {
+        let mut encoded = [0u8; mem::size_of::<Header>()];
+    
+        let mut reader = HEADER;
+        reader.read_exact(&mut encoded).unwrap();
+        bincode::deserialize(&encoded[..]).unwrap()
+    };
+
+    println!("{:?}", header);
+}