chore: reorg

2020-10-17 11:50:12 +08:00
parent a034988643
commit bb6762ab81
55 changed files with 0 additions and 0 deletions
--- a/__ffi/jni/HelloWorld.java
+++ b/__ffi/jni/HelloWorld.java
@@ -0,0 +1,18 @@
+public class HelloWorld {
+    // This declares that the static `hello` method will be provided
+    // a native library.
+    private static native String hello(String input);
+
+    static {
+        // This actually loads the shared object that we'll be creating.
+        // The actual location of the .so or .dll may differ based on your
+        // platform.
+        System.loadLibrary("samplejni");
+    }
+
+    // The rest is just regular ol' Java!
+    public static void main(String[] args) {
+        String output = HelloWorld.hello("josh");
+        System.out.println(output);
+    }
+}
--- a/__ffi/jni/README.md
+++ b/__ffi/jni/README.md
@@ -0,0 +1,13 @@
+
+> https://docs.rs/jni/0.13.0/jni/
+> 
+> https://crates.io/crates/jni
+
+Run:
+```bash
+cd samplejni; cargo build
+cd -; javac HelloWorld.java
+LD_LIBRARY_PATH=samplejni/target/debug/ java HelloWorld
+```
+
+
--- a/__ffi/jni/samplejni/Cargo.lock
+++ b/__ffi/jni/samplejni/Cargo.lock
@@ -0,0 +1,210 @@
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+# It is not intended for manual editing.
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--- a/__ffi/jni/samplejni/Cargo.toml
+++ b/__ffi/jni/samplejni/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "samplejni"
+version = "0.1.0"
+authors = ["Hatter Jiang@Pixelbook <jht5945@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+jni = "0.13.0"
+
+[lib]
+crate_type = ["cdylib"]
--- a/__ffi/jni/samplejni/src/lib.rs
+++ b/__ffi/jni/samplejni/src/lib.rs
@@ -0,0 +1,42 @@
+extern crate jni;
+
+// This is the interface to the JVM that we'll call the majority of our
+// methods on.
+use jni::JNIEnv;
+
+// These objects are what you should use as arguments to your native
+// function. They carry extra lifetime information to prevent them escaping
+// this context and getting used after being GC'd.
+use jni::objects::{JClass, JString};
+
+// This is just a pointer. We'll be returning it from our function. We
+// can't return one of the objects with lifetime information because the
+// lifetime checker won't let us.
+use jni::sys::jstring;
+
+// This keeps Rust from "mangling" the name and making it unique for this
+// crate.
+#[no_mangle]
+// This turns off linter warnings because the name doesn't conform to
+// conventions.
+#[allow(non_snake_case)]
+pub extern "system" fn Java_HelloWorld_hello(env: JNIEnv,
+// This is the class that owns our static method. It's not going to be used,
+// but still must be present to match the expected signature of a static
+// native method.
+                                             class: JClass,
+                                             input: JString)
+                                             -> jstring {
+    // First, we have to get the string out of Java. Check out the `strings`
+    // module for more info on how this works.
+    let input: String =
+        env.get_string(input).expect("Couldn't get java string!").into();
+
+    // Then we have to create a new Java string to return. Again, more info
+    // in the `strings` module.
+    let output = env.new_string(format!("Hello, {}!", input))
+        .expect("Couldn't create java string!");
+
+    // Finally, extract the raw pointer to return.
+    output.into_inner()
+}
--- a/__ffi/live-reload-rust/README.md
+++ b/__ffi/live-reload-rust/README.md
@@ -0,0 +1,5 @@
+
+reference: https://fasterthanli.me/articles/so-you-want-to-live-reload-rust
+
+PDF: https://playsecurity.org/getdoc/3958_635BCC52F59BF7DB3EC161313629B923/So%20you%20want%20to%20live-reload%20Rust.pdf
+
--- a/__ffi/live-reload-rust/greet-rs-2/Cargo.lock
+++ b/__ffi/live-reload-rust/greet-rs-2/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greet-rs-2"
+version = "0.1.0"
--- a/__ffi/live-reload-rust/greet-rs-2/Cargo.toml
+++ b/__ffi/live-reload-rust/greet-rs-2/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "greet-rs-2"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
--- a/__ffi/live-reload-rust/greet-rs-2/src/main.rs
+++ b/__ffi/live-reload-rust/greet-rs-2/src/main.rs
@@ -0,0 +1,36 @@
+use std::{ffi::c_void, ffi::CString, os::raw::c_char, os::raw::c_int};
+
+#[link(name = "dl")]
+extern "C" {
+    fn dlopen(path: *const c_char, flags: c_int) -> *const c_void;
+    fn dlsym(handle: *const c_void, name: *const c_char) -> *const c_void;
+    fn dlclose(handle: *const c_void);
+}
+
+// had to look that one up in `dlfcn.h`
+// in C, it's a #define. in Rust, it's a proper constant
+pub const RTLD_LAZY: c_int = 0x00001;
+
+fn main() {
+    let lib_name = CString::new("../libgreet.so").unwrap();
+    let lib = unsafe { dlopen(lib_name.as_ptr(), RTLD_LAZY) };
+    if lib.is_null() {
+        panic!("could not open library");
+    }
+
+    let greet_name = CString::new("greet").unwrap();
+    let greet = unsafe { dlsym(lib, greet_name.as_ptr()) };
+
+    type Greet = unsafe extern "C" fn(name: *const c_char);
+    use std::mem::transmute;
+    let greet: Greet = unsafe { transmute(greet) };
+
+    let name = CString::new("fresh coffee").unwrap();
+    unsafe {
+        greet(name.as_ptr());
+    }
+
+    unsafe {
+        dlclose(lib);
+    }
+}
--- a/__ffi/live-reload-rust/greet-rs-3/Cargo.lock
+++ b/__ffi/live-reload-rust/greet-rs-3/Cargo.lock
@@ -0,0 +1,81 @@
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+# It is not intended for manual editing.
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+ "quote",
+]
+
+[[package]]
+name = "greet-rs-3"
+version = "0.1.0"
+dependencies = [
+ "cstr",
+ "libloading",
+]
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--- a/__ffi/live-reload-rust/greet-rs-3/Cargo.toml
+++ b/__ffi/live-reload-rust/greet-rs-3/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "greet-rs-3"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cstr = "*"
+libloading = "*"
--- a/__ffi/live-reload-rust/greet-rs-3/src/main.rs
+++ b/__ffi/live-reload-rust/greet-rs-3/src/main.rs
@@ -0,0 +1,14 @@
+use cstr::cstr;
+use std::{error::Error, os::raw::c_char};
+
+use libloading::{Library, Symbol};
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let lib = Library::new("../libgreet.so")?;
+    unsafe {
+        let greet: Symbol<unsafe extern "C" fn(name: *const c_char)> = lib.get(b"greet")?;
+        greet(cstr!("rust macros").as_ptr());
+    }
+
+    Ok(())
+}
--- a/__ffi/live-reload-rust/greet-rs/Cargo.lock
+++ b/__ffi/live-reload-rust/greet-rs/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greet-rs"
+version = "0.1.0"
--- a/__ffi/live-reload-rust/greet-rs/Cargo.toml
+++ b/__ffi/live-reload-rust/greet-rs/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "greet-rs"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
--- a/__ffi/live-reload-rust/greet-rs/README.md
+++ b/__ffi/live-reload-rust/greet-rs/README.md
@@ -0,0 +1,11 @@
+build libgreet.so
+
+
+direct build or use build.rs:
+RUSTFLAGS="-L ${PWD}/.." cargo build
+
+
+run:
+LD_LIBRARY_PATH="${PWD}/.." ./target/debug/greet-rs
+
+
--- a/__ffi/live-reload-rust/greet-rs/build.rs
+++ b/__ffi/live-reload-rust/greet-rs/build.rs
@@ -0,0 +1,10 @@
+use std::path::PathBuf;
+
+fn main() {
+    let manifest_dir =
+        PathBuf::from(std::env::var_os("CARGO_MANIFEST_DIR").expect("manifest dir should be set"));
+    let lib_dir = manifest_dir
+        .parent()
+        .expect("manifest dir should have a parent");
+    println!("cargo:rustc-link-search={}", lib_dir.display());
+}
--- a/__ffi/live-reload-rust/greet-rs/src/main.rs
+++ b/__ffi/live-reload-rust/greet-rs/src/main.rs
@@ -0,0 +1,14 @@
+use std::{ffi::CString, os::raw::c_char};
+
+#[link(name = "greet")]
+extern "C" {
+    fn greet(name: *const c_char);
+}
+
+fn main() {
+    let name = CString::new("fresh coffee").unwrap();
+    unsafe {
+        greet(name.as_ptr());
+    }
+}
+
--- a/__ffi/live-reload-rust/greet.c
+++ b/__ffi/live-reload-rust/greet.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+void greet(const char *name) {
+    printf("Hello, %s!\n", name);
+}
--- a/__ffi/live-reload-rust/greet.c-compile-shared.sh
+++ b/__ffi/live-reload-rust/greet.c-compile-shared.sh
@@ -0,0 +1 @@
+gcc -Wall -shared greet.c -o libgreet.so
--- a/__ffi/live-reload-rust/greet.c-compile.sh
+++ b/__ffi/live-reload-rust/greet.c-compile.sh
@@ -0,0 +1 @@
+gcc -Wall -c greet.c
--- a/__ffi/live-reload-rust/libgreet-rs/Cargo.lock
+++ b/__ffi/live-reload-rust/libgreet-rs/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greet"
+version = "0.1.0"
+
--- a/__ffi/live-reload-rust/libgreet-rs/Cargo.toml
+++ b/__ffi/live-reload-rust/libgreet-rs/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "greet"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["dylib"]
+
+[dependencies]
--- a/__ffi/live-reload-rust/libgreet-rs/src/lib.rs
+++ b/__ffi/live-reload-rust/libgreet-rs/src/lib.rs
@@ -0,0 +1,10 @@
+use std::{ffi::CStr, os::raw::c_char};
+
+/// # Safety
+/// Pointer must be valid, and point to a null-terminated
+/// string. What happens otherwise is UB.
+pub unsafe extern "C" fn greet(name: *const c_char) {
+    let cstr = CStr::from_ptr(name);
+    println!("Hello, {}!", cstr.to_str().unwrap());
+}
+
--- a/__ffi/live-reload-rust/load-shared.c
+++ b/__ffi/live-reload-rust/load-shared.c
@@ -0,0 +1,21 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+typedef void (*greet_t)(const char *name);
+
+int main(void) {
+    // this was `./libmain.so`
+    void *lib = dlopen("./libgreet.so", RTLD_LAZY);
+    if (!lib) {
+        fprintf(stderr, "failed to load library\n");
+        return 1;
+    }
+    greet_t greet = (greet_t) dlsym(lib, "greet");
+    if (!lib) {
+        fprintf(stderr, "could not look up symbol 'greet'\n");
+        return 1;
+    }
+    greet("venus");
+    dlclose(lib);
+    return 0;
+}
--- a/__ffi/live-reload-rust/load.c
+++ b/__ffi/live-reload-rust/load.c
@@ -0,0 +1,24 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+// C function pointer syntax is... something.
+// Let's typedef our way out of this one.
+typedef void (*greet_t)(const char *name);
+
+int main(void) {
+    // what do we want? symbols!
+    // when do we want them? at an implementation-defined time!
+    void *lib = dlopen("./main-greet", RTLD_LAZY);
+    if (!lib) {
+        fprintf(stderr, "failed to load library\n");
+        return 1;
+    }
+    greet_t greet = (greet_t) dlsym(lib, "greet");
+    if (!greet) {
+        fprintf(stderr, "could not look up symbol 'greet'\n");
+        return 1;
+    }
+    greet("venus");
+    dlclose(lib);
+    return 0;
+}
--- a/__ffi/live-reload-rust/load.c-compile.sh
+++ b/__ffi/live-reload-rust/load.c-compile.sh
@@ -0,0 +1 @@
+gcc -Wall load.c -o load
--- a/__ffi/live-reload-rust/main-greet.c
+++ b/__ffi/live-reload-rust/main-greet.c
@@ -0,0 +1,6 @@
+extern void greet(const char *name);
+
+int main(void) {
+    greet("stars");
+    return 0;
+}
--- a/__ffi/live-reload-rust/main-greet.c-compile-link.sh
+++ b/__ffi/live-reload-rust/main-greet.c-compile-link.sh
@@ -0,0 +1,2 @@
+gcc -Wall -c main-greet.c
+gcc main-greet.o greet.o -o main-greet
--- a/__ffi/live-reload-rust/main.c
+++ b/__ffi/live-reload-rust/main.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+void greet(const char *name) {
+    printf("Hello, %s!\n", name);
+}
+
+int main(void) {
+    greet("moon");
+    return 0;
+}
--- a/__ffi/live-reload-rust/main.c-compile.sh
+++ b/__ffi/live-reload-rust/main.c-compile.sh
@@ -0,0 +1 @@
+gcc -Wall main.c -o main