initial rust skeleton project. Probably doesn't work.

CMakeLists.txt

@@ -30,6 +30,7 @@ option(LIBICSNEO_ENABLE_TCP "Enable devices which communicate over TCP" OFF)
 option(LIBICSNEO_ENABLE_FTD3XX "Enable devices which communicate over USB FTD3XX" ON)
 
 option(LIBICSNEO_ENABLE_BINDINGS_PYTHON "Enable Python library" OFF)
+option(LIBICSNEO_ENABLE_BINDINGS_RUST "Enable Rust library" OFF)
 
 if(NOT CMAKE_CXX_STANDARD)
 	set(CMAKE_CXX_STANDARD 17)

bindings/CMakeLists.txt

@@ -1,3 +1,18 @@
 if(LIBICSNEO_ENABLE_BINDINGS_PYTHON)
 	add_subdirectory(python)
+endif()
+
+if(LIBICSNEO_ENABLE_BINDINGS_RUST)
+	include(FetchContent)
+
+	FetchContent_Declare(
+		Corrosion
+		GIT_REPOSITORY https://github.com/corrosion-rs/corrosion.git
+		GIT_TAG v0.5 # Optionally specify a commit hash, version tag or branch here
+	)
+	FetchContent_MakeAvailable(Corrosion)
+
+	corrosion_import_crate(MANIFEST_PATH ${CMAKE_SOURCE_DIR}/bindings/rust/icsneors/Cargo.toml)
+else()
+	message(STATUS "Not building rust bindings")
 endif()

bindings/rust/icsneors/.gitignore

@@ -0,0 +1,21 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/

bindings/rust/icsneors/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "icsneors"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+
+[features]
+static = []
+
+[dependencies]
+
+[build-dependencies]
+bindgen = "0.71.1"
+path-clean = "1.0.1"
+cmake = "0.1.52"
+which = "7.0.0"

bindings/rust/icsneors/build.rs

@@ -0,0 +1,202 @@
+use cmake::Config;
+use path_clean::{clean, PathClean};
+use std::{env, path::PathBuf};
+
+fn libicsneo_path() -> PathBuf {
+    // Get the path of libicsneo
+    let path = std::env::var("LIBICSNEO_PATH")
+        .unwrap_or(format!("{}/../../../", env!("CARGO_MANIFEST_DIR")));
+    let libicsneo_path = std::path::PathBuf::from(clean(&path));
+
+    libicsneo_path
+}
+
+fn libicsneo_include_path() -> PathBuf {
+    let path = libicsneo_path().join("include");
+    path.clean()
+}
+
+fn libicsneo_header_path() -> PathBuf {
+    let path = libicsneo_include_path().join("icsneo").join("icsneo.h");
+    path.clean()
+}
+
+// Detects the cargo build profile, true = release, otherwise false
+fn is_release_build() -> bool {
+    let profile = std::env::var("PROFILE").unwrap();
+    match profile.as_str() {
+        "debug" => return false,
+        "release" => return true,
+        _ => return false,
+    }
+}
+
+// returns the cmake build string that is normally passed to -DCMAKE_BUILD_TYPE=
+fn cmake_build_config_type() -> String {
+    let build_config_type = if is_release_build() {
+        "Release"
+    } else {
+        if cfg!(target_os = "windows") {
+            // Rust runtime is linked with /MD on windows MSVC... MSVC takes Debug and forces /MDd
+            // https://www.reddit.com/r/rust/comments/dvmzo2/cargo_external_c_library_windows_debugrelease_hell/
+            "RelWithDebInfo"
+        } else {
+            "Debug"
+        }
+    };
+    build_config_type.to_string()
+}
+
+// Build libicsneo through cmake, returns the build directory
+fn build_libicsneo() -> PathBuf {
+    let libicsneo_path = libicsneo_path();
+    // Check to make sure CMakeLists.txt exists
+    if !libicsneo_path.join("CMakeLists.txt").exists() {
+        panic!("CMakeLists.txt not found at {}", libicsneo_path.display());
+    }
+    let build_config_type = cmake_build_config_type();
+    // Run cmake on libicsneo
+    let mut config = Config::new(libicsneo_path.clone());
+    let config = config
+        .build_target("ALL_BUILD")
+        // .define("LIBICSNEO_BUILD_ICSNEOC_STATIC:BOOL", "ON")
+        // .define("LIBICSNEO_BUILD_EXAMPLES:BOOL", "OFF")
+        // .define("LIBICSNEO_BUILD_ICSNEOLEGACY:BOOL", "OFF")
+        .profile(&build_config_type);
+    // Lets use ninja if it exists
+    let config = match which::which("ninja") {
+        Ok(_) => config.generator("Ninja Multi-Config").build_target("all"),
+        Err(_e) => config,
+    };
+    config.build()
+}
+
+fn setup_linker_libs(build_path: &PathBuf) {
+    let build_config_type = cmake_build_config_type();
+    // output for lib path
+    println!(
+        "cargo:warning=build search path: {:?}",
+        build_path
+            .join(format!("build/{build_config_type}"))
+            .display()
+    );
+    // icsneo lib/dll linker search path
+    println!(
+        "cargo:rustc-link-search=native={}",
+        build_path
+            .join(format!("build/{build_config_type}"))
+            .display()
+    );
+    // fatfs linker search path and addition
+    println!(
+        "cargo:rustc-link-search=native={}/build/third-party/fatfs/{build_config_type}",
+        build_path.display()
+    );
+    // libicsneo libraries
+    println!("cargo:rustc-link-lib=fatfs");
+    println!("cargo:rustc-link-lib=static=icsneocpp");
+    if cfg!(feature = "static") {
+        println!("cargo:rustc-link-lib=static=icsneo-static");
+    } else {
+        println!("cargo:rustc-link-lib=dylib=icsneo");
+    }
+    // Platform specific libraries
+    match env::var("CARGO_CFG_TARGET_OS").unwrap().as_str() {
+        "windows" => {
+            // FTD3xx linker search path and addition
+            println!(
+                "cargo:rustc-link-search=native={}/build/_deps/ftdi3xx-src",
+                build_path.display()
+            );
+            println!("cargo:rustc-link-lib=FTD3XX");
+        }
+        "linux" => {}
+        "macos" => {
+            println!("cargo:rustc-link-lib=static=icsneo-static");
+            println!("cargo:rustc-link-lib=framework=IOKit");
+            println!("cargo:rustc-link-lib=framework=CoreFoundation");
+        }
+        target_os => panic!("Target OS not supported: {target_os}"),
+    }
+}
+
+fn prepare_git_submodule() {
+    // We don't need to checkout the submodule if we are using a custom libicsneo path
+    if std::env::var("LIBICSNEO_PATH").is_ok() {
+        println!("cargo:warning=Using custom LIBICSNEO_PATH, skipping checking out submodules");
+        return;
+    }
+    let libicsneo_path = libicsneo_path();
+    // This seems to not be needed when including this as a dependency? Why?
+    // checkout the submodule if needed
+    let output = std::process::Command::new("git")
+        .args(["submodule", "update", "--init"])
+        .current_dir(libicsneo_path)
+        .output()
+        .expect("Failed to fetch git submodules!");
+    // Make sure git was successful!
+    if !output.status.success() {
+        println!("cargo:warning=git return code: {}", output.status);
+        let stdout = std::str::from_utf8(&output.stdout).unwrap();
+        for line in stdout.split("\n") {
+            println!("cargo:warning=git stdout: {}", line);
+        }
+        let stderr = std::str::from_utf8(&output.stderr).unwrap();
+        for line in stderr.split("\n") {
+            println!("cargo:warning=git stderr: {}", line);
+        }
+    }
+}
+
+fn generate_bindings() {
+    let header = libicsneo_header_path();
+    let bindings = bindgen::Builder::default()
+        .header(header.to_str().unwrap())
+        .default_enum_style(bindgen::EnumVariation::Rust {
+            non_exhaustive: false,
+        })
+        .clang_args(&[format!("-I{}", libicsneo_include_path().display()).as_str()])
+        .blocklist_file("stdint.h")
+        .blocklist_file("stdbool.h")
+        .use_core()
+        // .allowlist_function("icsneo_.*")
+        // .allowlist_type("neodevice_t")
+        // .allowlist_type("neonetid_t")
+        // .allowlist_type("neomessage_.*")
+        // .allowlist_type("neoversion_t")
+        // .allowlist_type("neoevent_t")
+        .formatter(bindgen::Formatter::Rustfmt)
+        .derive_default(true)
+        .derive_debug(true)
+        .derive_partialeq(true)
+        .derive_copy(true)
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
+        //.clang_args(clang_args())
+        .generate()
+        .expect("Unable to generate bindings");
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    println!("cargo:warning=out_path: {:?}", out_path.display());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings");
+
+    let out_path = std::path::PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}
+
+fn main() {
+    let header = libicsneo_header_path();
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed={}", header.to_str().unwrap());
+    println!("cargo:rerun-if-env-changed=LIBMSVC_PATH");
+
+    prepare_git_submodule();
+    generate_bindings();
+    // We can skip building if its for docs.rs
+    if std::env::var("DOCS_RS").is_err() {
+        let build_directory = build_libicsneo();
+        setup_linker_libs(&build_directory);
+    }
+}

bindings/rust/icsneors/src/lib.rs

@@ -0,0 +1,20 @@
+// Suppress the flurry of warnings caused by using "C" naming conventions
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}