rust FFI \u662frust\u4e0e\u5176\u4ed6\u8bed\u8a00\u4e92\u8c03\u7684\u6865\u6881\uff0c\u901a\u8fc7FFI rust \u53ef\u4ee5\u6709\u6548\u7ee7\u627f C \u8bed\u8a00\u7684\u5386\u53f2\u8d44\u4ea7\u3002\u672c\u671f\u901a\u8fc7\u51e0\u4e2a\u4f8b\u5b50\u6765\u804a\u804arust\u4e0eC \u8bed\u8a00\u4ea4\u4e92\u7684\u5177\u4f53\u6b65\u9aa4\u3002<\/p>\n
\u521b\u5efa\u5de5\u7a0b<\/p>\n
cargo new --bin ffi_sample\n\n\n\n<\/code><\/pre>\nCargo.toml \u914d\u7f6e<\/p>\n
[package]\nname = "ffi_sample"\nversion = "0.1.0"\nedition = "2021"\nbuild = "build.rs"\n\n# See more keys and their definitions at https:\/\/doc.rust-lang.org\/cargo\/reference\/manifest.html\n\n[build-dependencies]\ncc = "1.0.79"\n\n[dependencies]\nlibc = "0.2.146"\nlibloading = "0.8.0"\n\n\n\n<\/code><\/pre>\n\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684c\u7a0b\u5e8fsample.c<\/p>\n
int add(int a,int b){\n return a+b;\n}\n\n\n\n<\/code><\/pre>\nmain.rs<\/a><\/p>\nuse std::os::raw::c_int;\n\n\n#[link(name = "sample")]\nextern "C" {\n fn add(a: c_int, b: c_int) -> c_int;\n}\n\nfn main() {\n let r = unsafe { add(2, 18) };\n println!("{:?}", r);\n}\n\n\n\n<\/code><\/pre>\nbuild.rs<\/a><\/p>\n\nfn main() {\n cc::Build::new().file("sample.c").compile("sample");\n}\n\n\n\n\n<\/code><\/pre>\n\u4ee3\u7801\u76ee\u5f55\u6811<\/p>\n
.\n\u251c\u2500\u2500 Cargo.lock\n\u251c\u2500\u2500 Cargo.toml\n\u251c\u2500\u2500 build.rs\n\u251c\u2500\u2500 sample.c\n\u2514\u2500\u2500 src\n \u00a0\u00a0 \u2514\u2500\u2500 main.rs\n\n\n\n<\/code><\/pre>\ncargo run\n\n\n\n<\/code><\/pre>\n\u573a\u666f\u4e8c \u4f7f\u7528bindgen \u901a\u8fc7\u5934\u6587\u4ef6\u7ed1\u5b9ac\u8bed\u8a00\u52a8\u6001\u94fe\u63a5\u5e93<\/h2>\n
\u4fee\u6539Cargo.toml,\u65b0\u589ebindgen\u4f9d\u8d56<\/p>\n
[package]\nname = "ffi_sample"\nversion = "0.1.0"\nedition = "2021"\nbuild = "build.rs"\n\n# See more keys and their definitions at https:\/\/doc.rust-lang.org\/cargo\/reference\/manifest.html\n\n[build-dependencies]\ncc = "1.0.79"\nbindgen = "0.65.1"\n\n[dependencies]\nlibc = "0.2.146"\nlibloading = "0.8.0"\n\n\n\n<\/code><\/pre>\n\u65b0\u589e sample.h \u5934\u6587\u4ef6<\/p>\n
#ifndef ADD_H\n#define ADD_H\n\nint add(int a, int b);\n\n#endif\n\n\n\n<\/code><\/pre>\n\u65b0\u589e wrapper.h \u5934\u6587\u4ef6 wrapper.h \u6587\u4ef6\u5c06\u5305\u62ec\u6240\u6709\u5404\u79cd\u5934\u6587\u4ef6\uff0c\u8fd9\u4e9b\u5934\u6587\u4ef6\u5305\u542b\u6211\u4eec\u60f3\u8981\u7ed1\u5b9a\u7684\u7ed3\u6784\u548c\u51fd\u6570\u7684\u58f0\u660e<\/p>\n
#include "sample.h";\n\n\n\n<\/code><\/pre>\n\u6539\u5199build.rs<\/a> \u7f16\u8bd1 sample.c \u751f\u6210\u52a8\u6001\u94fe\u63a5\u5e93sample.so<\/a>;\u901a\u8fc7bindgen\u751f\u6210rust binding c \u7684\u4ee3\u7801\u5e76\u8f93\u51fa\u5230 bindings \u76ee\u5f55<\/p>\nuse std::path::PathBuf;\n\nfn main() {\n \/\/ \u53c2\u8003cc \u6587\u6863\n println!("cargo:rerun-if-changed=sample.c");\n cc::Build::new()\n .file("sample.c")\n .shared_flag(true)\n .compile("sample.so");\n \/\/ \u53c2\u8003 https:\/\/doc.rust-lang.org\/cargo\/reference\/build-scripts.html\n println!("cargo:rustc-link-lib=sample.so");\n println!("cargo:rerun-if-changed=sample.h");\n let bindings = bindgen::Builder::default()\n .header("wrapper.h")\n .parse_callbacks(Box::new(bindgen::CargoCallbacks))\n .generate()\n .expect("Unable to generate bindings");\n\n let out_path = PathBuf::from("bindings");\n bindings\n .write_to_file(out_path.join("sample_bindings.rs"))\n .expect("Couldn't write bindings!");\n}\n\n\n\n<\/code><\/pre>\n\u4fee\u6539main.rs<\/a> include \u5b8f\u5f15\u5165sample \u52a8\u6001\u94fe\u63a5\u5e93\u7684binding\u3002\u4ee5\u524d\u6211\u4eec\u81ea\u5df1\u624b\u5199\u7684C\u51fd\u6570\u7ed1\u5b9a\u5c31\u4e0d\u9700\u8981\u4e86\uff0c\u770b\u770bbindings\/sample_bindings.rs \u7684\u5185\u5bb9\u4e0e\u6211\u4eec\u624b\u5199\u7684\u51fd\u6570\u7ed1\u5b9a\u662f\u7b49\u6548\u7684<\/p>\ninclude!("..\/bindings\/sample_bindings.rs");\n\n\/\/ #[link(name = "sample")]\n\/\/ extern "C" {\n\/\/ fn add(a: c_int, b: c_int) -> c_int;\n\/\/ }\n\nfn main() {\n let r = unsafe { add(2, 18) };\n println!("{:?}", r);\n}\n\n\n\n\n<\/code><\/pre>\n\u4ee3\u7801\u76ee\u5f55\u6811<\/p>\n
.\n\u251c\u2500\u2500 Cargo.lock\n\u251c\u2500\u2500 Cargo.toml\n\u251c\u2500\u2500 bindings\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 sample_bindings.rs\n\u251c\u2500\u2500 build.rs\n\u251c\u2500\u2500 sample.c\n\u251c\u2500\u2500 sample.h\n\u251c\u2500\u2500 src\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 main.rs\n\u2514\u2500\u2500 wrapper.h\n\n\n\n<\/code><\/pre>\nffi_sample \u5de5\u7a0b\u7684\u5b8c\u6574\u4ee3\u7801\u4f4d\u7f6e<\/a>,\u8bfb\u8005\u53ef\u4ee5clone https:\/\/github.com\/jiashiwen\/wenpanrust\uff0c\u76f4\u63a5\u8fd0\u884c\u5373\u53ef<\/a><\/p>\ncargo run -p ffi_sample\n\n\n\n<\/code><\/pre>\n\u573a\u666f\u4e09 \u5c01\u88c5\u4e00\u4e2ac\u7f16\u5199\u7684\u5e93<\/h2>\n
secp256k1\u662f\u4e00\u4e2a\u692d\u5706\u66f2\u7ebf\u8ba1\u7b97\u7684 clib\uff0c\u8fd9\u73a9\u610f\u513f\u5728\u5bc6\u7801\u5b66\u548c\u9690\u79c1\u8ba1\u7b97\u65b9\u9762\u7684\u5e38\u7528\u7b97\u6cd5\uff0c\u4e0b\u9762\u6211\u4eec\u4ece\u5de5\u7a0b\u65b9\u9762\u770b\u770b\u5c01\u88c5secp256k1\u5982\u4f55\u64cd\u4f5c<\/p>\n
cargo new --lib wrapper_secp256k1\n\n\n\n<\/code><\/pre>\ncargo.toml<\/p>\n
[package]\nname = "wrapper_secp256k1"\nversion = "0.1.0"\nedition = "2021"\n\n# See more keys and their definitions at https:\/\/doc.rust-lang.org\/cargo\/reference\/manifest.html\n[build-dependencies]\ncc = "1.0.79"\nbindgen = "0.65.1"\n\n[dependencies]\n\n\n\n<\/code><\/pre>\ngit \u5f15\u5165 submodule<\/p>\n
cd wrapper_secp256k1\ngit submodule add https:\/\/github.com\/bitcoin-core\/secp256k1 wrapper_secp256k1\/secp256k1_sys \n\n\n\n<\/code><\/pre>\n\u5de5\u7a0b\u4e0b\u65b0\u5efabindings\u76ee\u5f55\u7528\u6765\u5b58\u653e\u7ed1\u5b9a\u6587\u4ef6\uff0c\u8be5\u76ee\u5f55\u4e0esrc\u5e73\u7ea7<\/p>\n
wrapper.h<\/p>\n
#include "secp256k1_sys\/secp256k1\/include\/secp256k1.h"\n\n\n\n<\/code><\/pre>\nbuild.rs<\/a><\/p>\nuse std::path::PathBuf;\n\nfn main() {\n println!("cargo:rustc-link-lib=secp256k1");\n println!("cargo:rerun-if-changed=wrapper.h");\n let bindings = bindgen::Builder::default()\n .header("wrapper.h")\n .parse_callbacks(Box::new(bindgen::CargoCallbacks))\n .generate()\n .expect("Unable to generate bindings");\n\n let out_path = PathBuf::from("bindings");\n bindings\n .write_to_file(out_path.join("bindings.rs"))\n .expect("Couldn't write bindings!");\n}\n\n\n\n<\/code><\/pre>\ncargo build \u901a\u8fc7<\/p>\n
\u7f16\u5199\u6d4b\u8bd5 lib.rs<\/a><\/p>\ninclude!("..\/bindings\/secp256k1.rs");\n\n#[cfg(test)]\nmod tests {\n use super::*;\n\n #[test]\n fn test_create_pubkey() {\n \/\/ secp256k1\u8fd4\u56de\u516c\u94a5\n let mut pubkey: secp256k1_pubkey = secp256k1_pubkey { data: [0; 64] };\n let prikey: u8 = 1;\n\n unsafe {\n let context = secp256k1_context_create(SECP256K1_CONTEXT_SIGN);\n assert!(!context.is_null());\n let ret = secp256k1_ec_pubkey_create(&*context, &mut pubkey, &prikey);\n assert_eq!(ret, 1);\n }\n }\n}\n\n\n\n<\/code><\/pre>\n\u8fd0\u884c\u6d4b\u8bd5 cargo test \u62a5\u9519<\/p>\n
warning: `wrapper_secp256k1` (lib) generated 5 warnings\nerror: linking with `cc` failed: exit status: 1\n |\n = note: LC_ALL="C" PATH="\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/bin:\/Users\/jiashiwen\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libobject-6d1da0e5d7930106.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libmemchr-d6d74858e37ed726.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libaddr2line-d75e66c6c1b76fdd.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libgimli-546ea342344e3761.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/librustc_demangle-8ad10e36ca13f067.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libstd_detect-0543b8486ac00cf6.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libhashbrown-7f0d42017ce08763.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libminiz_oxide-65e6b9c4725e3b7f.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libadler-131157f72607aea7.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/librustc_std_workspace_alloc-f7d15060b16c135d.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libunwind-a52bfac5ae872be2.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libcfg_if-1762d9ac100ea3e7.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/liblibc-f8e0e4708f61f3f4.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/liballoc-af9a608dd9cb26b2.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/librustc_std_workspace_core-9777023438fd3d6a.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libcore-83ca6d61eb70e9b8.rlib" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib\/libcompiler_builtins-ea2ca6e1df0449b8.rlib" "-lSystem" "-lc" "-lm" "-L" "\/usr\/local\/Cellar\/rust\/1.70.0\/lib\/rustlib\/x86_64-apple-darwin\/lib" "-o" "\/Users\/jiashiwen\/rustproject\/wrapper_secp256k1\/target\/debug\/deps\/wrapper_secp256k1-4bf30c62ecfdf2a7" "-Wl,-dead_strip" "-nodefaultlibs"\n = note: ld: library not found for -lsecp256k1\n clang: error: linker command failed with exit code 1 (use -v to see invocation)\n\n\nwarning: `wrapper_secp256k1` (lib test) generated 5 warnings (5 duplicates)\nerror: could not compile `wrapper_secp256k1` (lib test) due to previous error; 5 warnings emitted\n\n\n\n<\/code><\/pre>\n\u62a5\u9519\u663e\u793a\u627e\u4e0d\u5230\u7f16\u8bd1 secp256k1 \u76f8\u5bf9\u5e94\u7684\u5e93\u3002<\/p>\n
\u624b\u52a8\u7f16\u8bd1secp256k1<\/p>\n
cd secp256k1_sys\n.\/autogen.sh\n.\/configure\nmake\nmake install\n\n\n\n<\/code><\/pre>\n\u7f16\u8bd1\u5b8c\u6210\u540e\uff0c\u6d4b\u8bd5\u901a\u8fc7<\/p>\n
\u5176\u5b9e secp256k1 \u6709\u5bf9\u5e94\u7684 rust wrapper<\/a>,\u6211\u4eec\u8fd9\u91cc\u53ea\u662f\u5c55\u793a\u4e00\u4e0b\u5c01\u88c5\u7684\u8fc7\u7a0b\u3002<\/p>\nwrapper_secp256k1 \u5de5\u7a0b\u7684\u5b8c\u6574\u4ee3\u7801\u4f4d\u7f6e<\/a>,\u6709\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5clone https:\/\/github.com\/jiashiwen\/wenpanrust\u3002<\/a>\u901a\u8fc7\u4ee5\u4e0b\u64cd\u4f5c\u67e5\u770b\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n- \n
clone \u9879\u76ee<\/p>\n
git clone https:\/\/github.com\/jiashiwen\/wenpanrust\ncd wenpanrust\n\n\n\n<\/code><\/pre>\n<\/li>\n- \n
update submodule<\/p>\n
git submodule init\ngit submodule update\n\n\n\n<\/code><\/pre>\n<\/li>\n- \n
\u7f16\u8bd1 secp256k1<\/p>\n
cd wrapper_secp256k1\/secp256k1_sys \n.\/autogen.sh\n.\/configure\nmake\nmake install \n\n\n\n<\/code><\/pre>\n<\/li>\n- \n
run test<\/p>\n
cargo test -p wrapper_secp256k1\n\n\n\n<\/code><\/pre>\n<\/li>\n<\/ul>\n\u53c2\u8003\u8d44\u6599<\/p>\n
Rust FFI (C vs Rust)\u5b66\u4e60\u6742\u8bb0.pdf<\/a>%E5%AD%A6%E4%B9%A0%E6%9D%82%E8%AE%B0.pdf)
bindgen\u5b98\u65b9\u6587\u6863<\/a>
Rust FFI \u7f16\u7a0b – bindgen \u4f7f\u7528\u793a\u4f8b<\/a><\/p>\n\n\u4f5c\u8005\uff1a\u4eac\u4e1c\u79d1\u6280 \u8d3e\u4e16\u95fb<\/p>\n
\u6765\u6e90\uff1a\u4eac\u4e1c\u4e91\u5f00\u53d1\u8005\u793e\u533a<\/p>\n<\/blockquote>\n