format rust -> rust generated code

csbindgen-tests/build.rs

@@ -40,23 +40,23 @@ fn main() {
     //     .generate()?
     //     .write_to_file("src/bullet3.rs")?;
 
-    // csbindgen::Builder::default()
-    //     .input_bindgen_file("src/lz4.rs")
-    //     .method_filter(|x| { !x.starts_with("_") && !x.starts_with("XXH") } )
-    //     .rust_method_prefix("csbindgen_")
-    //     .rust_file_header("use super::lz4;")
-    //     .rust_method_type_path("lz4")
-    //     .csharp_class_name("LibLz4")
-    //     .csharp_namespace("CsBindgen")
-    //     .csharp_dll_name("csbindgen_tests")
-    //     .csharp_dll_name_if("UNITY_IOS && !UNITY_EDITOR", "__Internal")
-    //     .csharp_entry_point_prefix("csbindgen_")
-    //     .csharp_method_prefix("")
-    //     .csharp_class_accessibility("public")
-    //     .csharp_c_long_convert("int")
-    //     .csharp_c_ulong_convert("uint")
-    //     .generate_to_file("src/lz4_ffi.rs", "../dotnet-sandbox/lz4_bindgen.cs")
-    //     .unwrap();
+    csbindgen::Builder::default()
+        .input_bindgen_file("src/lz4.rs")
+        .method_filter(|x| { x.starts_with("LZ4")} )
+        .rust_method_prefix("csbindgen_")
+        .rust_file_header("use super::lz4;")
+        .rust_method_type_path("lz4")
+        .csharp_class_name("LibLz4")
+        .csharp_namespace("CsBindgen")
+        .csharp_dll_name("csbindgen_tests")
+        .csharp_dll_name_if("UNITY_IOS && !UNITY_EDITOR", "__Internal")
+        .csharp_entry_point_prefix("csbindgen_")
+        .csharp_method_prefix("")
+        .csharp_class_accessibility("public")
+        .csharp_c_long_convert("int")
+        .csharp_c_ulong_convert("uint")
+        .generate_to_file("src/lz4_ffi.rs", "../dotnet-sandbox/lz4_bindgen.cs")
+        .unwrap();
 
     csbindgen::Builder::default()
         .input_extern_file("src/lib.rs")

csbindgen-tests/src/lib.rs

@@ -1,3 +1,5 @@
+use std::io::Bytes;
+
 #[allow(dead_code)]
 #[allow(non_snake_case)]
 #[allow(non_camel_case_types)]
@@ -14,15 +16,43 @@ pub extern "C" fn my_add(x: i32, y: i32) -> i32 {
     x + y
 }
 
-#[allow(unused)]
 #[no_mangle]
-pub extern "C" fn my_bool(x: bool, y: bool, z: bool, xr: *mut bool, yr: *mut bool, zr: *mut bool) -> bool {
+pub extern "C" fn my_bool(
+    x: bool,
+    y: bool,
+    z: bool,
+    xr: *mut bool,
+    yr: *mut bool,
+    zr: *mut bool,
+) -> bool {
     unsafe {
         *xr = x;
         *yr = y;
         *zr = z;
-        true
     }
+
+    true
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn new(x: *mut *mut Vec<u8>) {
+    let v = Box::new(Vec::new());
+    *x = Box::into_raw(v);
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn unsafe_return_string() -> *const u8 {
+todo!();
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn unsafe_return_string2() -> *const u8 {
+    todo!();
+}
+
+#[no_mangle]
+pub extern "C" fn unsafe_destroy_string(s: *mut String) {
+    unsafe { Box::from_raw(s) };
 }
 
 #[test]

csbindgen/src/emitter.rs

@@ -39,22 +39,20 @@ pub fn emit_rust_method(list: &Vec<ExternMethod>, options: &BindgenOptions) -> S
         let parameter_only_names = item
             .parameters
             .iter()
-            .map(|p| format!("            {}", p.name))
+            .map(|p| format!("        {}", p.name))
             .collect::<Vec<_>>()
             .join(",\n");
 
         let template = format!(
             "
 #[no_mangle]
-pub extern \"C\" fn {method_prefix}{method_name}(
+pub unsafe extern \"C\" fn {method_prefix}{method_name}(
 {parameters}    
 ){return_line}
 {{
-    unsafe {{
-        return {method_type_path2}{method_name}(
+    {method_type_path2}{method_name}(
 {parameter_only_names}
-        )
-    }}
+    )
 }}
 "
         );

csbindgen/src/type_meta.rs

@@ -111,6 +111,7 @@ impl RustType {
         fn convert_type_name(type_name: &str, options: &BindgenOptions) -> String {
             let name = match type_name {
                 // std::os::raw https://doc.rust-lang.org/std/os/raw/index.html
+                // std::ffi::raw https://doc.rust-lang.org/core/ffi/index.html
                 "c_char" => "byte",
                 "c_schar" => "sbyte",
                 "c_uchar" => "byte",
@@ -125,6 +126,7 @@ impl RustType {
                 "c_float" => "float",
                 "c_double" => "double",
                 "c_void" => "void",
+                "CString" => "sbyte",
                 // rust primitives
                 "i8" => "sbyte",
                 "i16" => "short",

dotnet-sandbox/Program.cs

@@ -1,14 +1,28 @@
-// See https://aka.ms/new-console-template for more information
+
+
+// See https://aka.ms/new-console-template for more information
 //using Csbindgen;
 using CsBindgen;
+using System.Buffers.Text;
 using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Text;
+
+
+
 unsafe
 {
     var a = false;
     var b = false;
     var c = false;
+    Console.WriteLine(Encoding.Default);
+
+
+    var p = LibRust.unsafe_return_string();
+
+    var s = Encoding.UTF8.GetString(p, 5);
+    Console.WriteLine(s);
 
 
 
@@ -33,4 +47,12 @@ public static unsafe partial class LibraryImportNativeMethods
     public static partial bool my_bool([MarshalAs(UnmanagedType.U1)] bool x, [MarshalAs(UnmanagedType.U1)] bool y, [MarshalAs(UnmanagedType.U1)] bool z, bool* xr, bool* yr, bool* zr);
 
 
+
+    [LibraryImport(__DllName)]
+    public static partial void foo(Foo f);
+}
+
+public struct Foo
+{
+    [MarshalAs(UnmanagedType.U1)] public bool A;
 }

dotnet-sandbox/asm.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly:DisableRuntimeMarshalling()]

dotnet-sandbox/method_call.cs

@@ -18,6 +18,15 @@ namespace CsBindgen
         [return: MarshalAs(UnmanagedType.U1)]
         public static extern bool my_bool([MarshalAs(UnmanagedType.U1)] bool x, [MarshalAs(UnmanagedType.U1)] bool y, [MarshalAs(UnmanagedType.U1)] bool z, bool* xr, bool* yr, bool* zr);
 
+        [DllImport(__DllName, EntryPoint = "unsafe_return_string", CallingConvention = CallingConvention.Cdecl)]
+        public static extern byte* unsafe_return_string();
+
+        [DllImport(__DllName, EntryPoint = "unsafe_return_string2", CallingConvention = CallingConvention.Cdecl)]
+        public static extern byte* unsafe_return_string2();
+
+        [DllImport(__DllName, EntryPoint = "unsafe_destroy_string", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void unsafe_destroy_string(String* s);
+
 
     }