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waku-rust-bindings
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Make c bindings from go lib build, compile and link

This commit is contained in:
danielsanchezq 2022-09-22 15:13:16 +02:00
parent 1b132c8a1f
commit 1dd73da1be
6 changed files with 437 additions and 22 deletions
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360
Cargo.lock generated
View File

@ -2,10 +2,370 @@
# It is not intended for manual editing.
version = 3
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name = "waku-sys"
version = "0.1.0"
dependencies = [
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name = "which"
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5
waku-sys/Cargo.toml
View File

@ -4,4 +4,7 @@ version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
[dependencies]
[build-dependencies]
bindgen = "0.60"

51
waku-sys/build.rs
View File

@ -1 +1,50 @@
fn main() {}
use bindgen;
use std::env;
use std::env::set_current_dir;
use std::path::PathBuf;
use std::process::Command;
fn main() {
let output_lib = "libgowaku.a";
set_current_dir("./vendor").unwrap();
Command::new("go")
.arg("build")
.arg("-buildmode=c-archive")
.arg("-o")
.arg(format!("./build/lib/{output_lib}"))
.arg("./library/")
.status()
.map_err(|e| println!("cargo:warning={}", e))
.unwrap();
set_current_dir("../").unwrap();
let mut lib_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
lib_dir.push("vendor");
lib_dir.push("build");
lib_dir.push("lib");
println!("cargo:rustc-link-search={}", lib_dir.display());
println!("cargo:rustc-link-lib=static=gowaku");
println!("cargo:rerun-if-changed=libgowaku.h");
// The bindgen::Builder is the main entry point
// to bindgen, and lets you build up options for
// the resulting bindings.
let bindings = bindgen::Builder::default()
// The input header we would like to generate
// bindings for.
.header(format!("{}/{}", lib_dir.display(), "libgowaku.h"))
// Tell cargo to invalidate the built crate whenever any of the
// included header files changed.
.parse_callbacks(Box::new(bindgen::CargoCallbacks))
// Finish the builder and generate the bindings.
.generate()
// Unwrap the Result and panic on failure.
.expect("Unable to generate bindings");
// Write the bindings to the $OUT_DIR/bindings.rs file.
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("Couldn't write bindings!");
}

17
waku-sys/src/lib.rs
View File

@ -1,14 +1,5 @@
pub fn add(left: usize, right: usize) -> usize {
left + right
}
#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() {
let result = add(2, 2);
assert_eq!(result, 4);
}
}
include!(concat!(env!("OUT_DIR"), "/bindings.rs"));

1
waku/Cargo.toml
View File

@ -6,3 +6,4 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
waku-sys = { path = "../waku-sys" }

25
waku/src/lib.rs
View File

@ -1,14 +1,25 @@
pub fn add(left: usize, right: usize) -> usize {
left + right
}
use waku_sys;
#[cfg(test)]
mod tests {
use super::*;
use std::ffi::CStr;
use std::os::raw::c_char;
use waku_sys::waku_content_topic;
#[test]
fn it_works() {
let result = add(2, 2);
assert_eq!(result, 4);
fn content_topic() {
let topic = unsafe {
waku_content_topic(
"foo_bar".as_ptr() as *mut c_char,
1,
"foo_topic".as_ptr() as *mut c_char,
"rfc26".as_ptr() as *mut c_char,
)
};
let topic_str = unsafe { CStr::from_ptr(topic) }
.to_str()
.expect("Decoded return");
println!("{}", topic_str);
}
}