feat: add rust ffi demo

CMakeLists.txt

@@ -10,6 +10,7 @@ option(KLSK_ENABLE_BENCHMARK "Enable benchmark of the klotski project." ON)
 
 option(KLSK_C_FFI "" ON)
 option(KLSK_PYTHON_FFI "" ON)
+option(KLSK_RUST_FFI "" ON)
 
 # ------------------------------------------------------------------------------------ #
 

src/core_ffi/CMakeLists.txt

@@ -12,11 +12,20 @@ endif()
 
 if (KLSK_PYTHON_FFI)
     pybind11_add_module(klotski_py
-            py_ffi/binder.cc
-            py_ffi/codec/short_code.cc
-            py_ffi/codec/common_codec.cc
+        py_ffi/binder.cc
+        py_ffi/codec/short_code.cc
+        py_ffi/codec/common_codec.cc
     )
     target_include_directories(klotski_py PRIVATE py_ffi/include)
     target_link_libraries(klotski_py PRIVATE klotski::core)
     set_target_properties(klotski_py PROPERTIES OUTPUT_NAME klotski)
 endif()
+
+if (KLSK_RUST_FFI)
+    # just for IDE highlight
+    add_library(klotski_rust
+        rust_ffi/src/demo.cc
+        rust_ffi/target/cxxbridge/klotski/src/common_code.rs.cc
+    )
+    target_include_directories(klotski_rust PRIVATE rust_ffi/target/cxxbridge)
+endif()

src/core_ffi/rust_ffi/.gitignore

@@ -0,0 +1 @@
+/target/

src/core_ffi/rust_ffi/Cargo.lock

@@ -0,0 +1,224 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "907d8581360765417f8f2e0e7d602733bbed60156b4465b7617243689ef9b83d"
+
+[[package]]
+name = "codespan-reporting"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3538270d33cc669650c4b093848450d380def10c331d38c768e34cac80576e6e"
+dependencies = [
+ "termcolor",
+ "unicode-width",
+]
+
+[[package]]
+name = "cxx"
+version = "1.0.124"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "273dcfd3acd4e1e276af13ed2a43eea7001318823e7a726a6b3ed39b4acc0b82"
+dependencies = [
+ "cc",
+ "cxxbridge-flags",
+ "cxxbridge-macro",
+ "link-cplusplus",
+]
+
+[[package]]
+name = "cxx-build"
+version = "1.0.124"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8b2766fbd92be34e9ed143898fce6c572dc009de39506ed6903e5a05b68914e"
+dependencies = [
+ "cc",
+ "codespan-reporting",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "scratch",
+ "syn",
+]
+
+[[package]]
+name = "cxxbridge-flags"
+version = "1.0.124"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "839fcd5e43464614ffaa989eaf1c139ef1f0c51672a1ed08023307fa1b909ccd"
+
+[[package]]
+name = "cxxbridge-macro"
+version = "1.0.124"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b2c1c1776b986979be68bb2285da855f8d8a35851a769fca8740df7c3d07877"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "klotski"
+version = "0.0.1"
+dependencies = [
+ "cxx",
+ "cxx-build",
+]
+
+[[package]]
+name = "link-cplusplus"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d240c6f7e1ba3a28b0249f774e6a9dd0175054b52dfbb61b16eb8505c3785c9"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "scratch"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3cf7c11c38cb994f3d40e8a8cde3bbd1f72a435e4c49e85d6553d8312306152"
+
+[[package]]
+name = "syn"
+version = "2.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b146dcf730474b4bcd16c311627b31ede9ab149045db4d6088b3becaea046462"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0336d538f7abc86d282a4189614dfaa90810dfc2c6f6427eaf88e16311dd225d"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d4cc384e1e73b93bafa6fb4f1df8c41695c8a91cf9c4c64358067d15a7b6c6b"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"

src/core_ffi/rust_ffi/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "klotski"
+version = "0.0.1"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cxx = "1.0.124"
+
+[build-dependencies]
+cxx-build = "1.0.124"

src/core_ffi/rust_ffi/build.rs

@@ -0,0 +1,8 @@
+fn main() {
+    cxx_build::bridge("src/common_code.rs")
+        .file("src/demo.cc")
+        .compile("klotski");
+
+    println!("cargo:rerun-if-changed=src/demo.cc");
+    println!("cargo:rerun-if-changed=src/common_code.rs");
+}

src/core_ffi/rust_ffi/src/common_code.rs

@@ -0,0 +1,18 @@
+#[cxx::bridge]
+pub mod ffi {
+    #[derive(Debug)]
+    pub struct CommonCode {
+        code: u64
+    }
+
+    extern "Rust" {}
+
+    unsafe extern "C++" {
+        include!("klotski/src/klotski.h");
+
+        // fn unwrap(self: &CommonCode) -> u64;
+
+        // fn from_string(s: &str) -> CommonCode;
+        fn from_string() -> CommonCode;
+    }
+}

src/core_ffi/rust_ffi/src/demo.cc

@@ -0,0 +1,8 @@
+#include "klotski/src/klotski.h"
+#include "klotski/src/common_code.rs.h"
+
+#include <iostream>
+
+CommonCode from_string() {
+    return CommonCode {};
+}

src/core_ffi/rust_ffi/src/klotski.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include "klotski/src/common_code.rs.h"
+
+CommonCode from_string();

src/core_ffi/rust_ffi/src/main.rs

@@ -0,0 +1,12 @@
+mod common_code;
+
+use common_code::ffi::CommonCode;
+
+fn main() {
+    // let code = CommonCode { code: 123 };
+    // let val = code.unwrap();
+    // println!("val = {}", val);
+
+    let code = common_code::ffi::from_string();
+    println!("code = {:?}", code);
+}