complete

csbindgen-tests/build.rs

@@ -3,14 +3,20 @@ use std::error::Error;
 fn main() -> Result<(), Box<dyn Error>> {
     bindgen::Builder::default()
         .header("c/lz4/lz4.h")
-        //.header("c/lz4/lz4hc.h")
+        .header("c/lz4/lz4hc.h")
-        //.header("c/lz4/lz4frame.h")
+        .header("c/lz4/lz4frame.h")
-        //.header("c/lz4/xxhash.h")
+        .header("c/lz4/xxhash.h")
         .generate()?
         .write_to_file("src/lz4.rs")?;
 
-    // TODO:build this
+    cc::Build::new()
-    cc::Build::new().file("c/lz4/lz4.c").compile("lz4");
+        .files([
+            "c/lz4/lz4.c",
+            "c/lz4/lz4hc.c",
+            "c/lz4/lz4frame.c",
+            "c/lz4/xxhash.c",
+        ])
+        .compile("lz4");
 
     // bindgen::Builder::default()
     //     .header("c/zstd/zstd.h")
@@ -31,7 +37,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     //     .generate()?
     //     .write_to_file("src/bullet3.rs")?;
 
-    csbindgen::Builder::new()
+    csbindgen::Builder::default()
         .input_bindgen_file("src/lz4.rs")
         .rust_method_prefix("csbindgen_")
         .rust_file_header("use super::lz4;")
@@ -43,6 +49,12 @@ fn main() -> Result<(), Box<dyn Error>> {
         .csharp_method_prefix("")
         .generate_to_file("src/lz4_ffi.rs", "../dotnet-sandbox/lz4_bindgen.cs")?;
 
+    csbindgen::Builder::default()
+        .input_extern_file("src/lib.rs")
+        .csharp_class_name("LibRust")
+        .csharp_dll_name("csbindgen_tests")
+        .generate_csharp_file("../dotnet-sandbox/method_call.cs")?;
+
     // csbindgen::Builder::new()
     //     .input_bindgen_file("src/zstd.rs")
     //     .rust_method_prefix("csbindgen_zstd_")

csbindgen-tests/src/lib.rs

@@ -9,21 +9,31 @@
 #[allow(non_camel_case_types)]
 mod lz4_ffi;
 
+#[no_mangle]
+pub extern "C" fn my_add(x: i32, y: i32) -> i32 {
+    x + y
+}
+
 #[test]
 fn build_test() {
-    let path = std::env::current_dir().unwrap();
+    // let path = std::env::current_dir().unwrap();
-    println!("starting dir: {}", path.display()); // csbindgen/csbindgen-tests
+    // println!("starting dir: {}", path.display()); // csbindgen/csbindgen-tests
 
-    // unsafe {
+    // // unsafe {
-    //     let num = lz4::LZ4_versionNumber();
+    // //     let num = lz4::LZ4_versionNumber();
-    //     println!("lz4 num: {}", num);
+    // //     println!("lz4 num: {}", num);
-    // }
+    // // }
 
-    csbindgen::Builder::new()
+    // csbindgen::Builder::default()
-        .input_bindgen_file("src/quiche.rs")
+    //     .input_bindgen_file("src/lz4.rs")
-        .rust_method_prefix("csbindgen_quiche_")
+    //     .rust_method_prefix("csbindgen_")
-        .csharp_class_name("LibQuiche")
+    //     .rust_file_header("use super::lz4;")
-        .csharp_dll_name("libquiche")
+    //     .rust_method_type_path("lz4")
-        .generate_to_file("src/quiche_ffi.rs", "../dotnet-sandbox/quiche_bindgen.cs")
+    //     .csharp_class_name("LibLz4")
-        .unwrap();
+    //     .csharp_dll_name("csbindgen_tests")
+    //     .csharp_dll_name_if("UNITY_IOS && !UNITY_EDITOR", "__Internal")
+    //     .csharp_entry_point_prefix("csbindgen_")
+    //     .csharp_method_prefix("")
+    //     .generate_to_file("src/lz4_ffi.rs", "../dotnet-sandbox/lz4_bindgen.cs")
+    //     .unwrap();
 }

csbindgen/src/builder.rs

@@ -5,7 +5,7 @@ use std::{
     path::Path,
 };
 
-use crate::generate;
+use crate::{generate, GenerateKind};
 
 pub struct Builder {
     options: BindgenOptions,
@@ -13,6 +13,7 @@ pub struct Builder {
 
 pub struct BindgenOptions {
     pub input_bindgen_file: String,
+    pub input_extern_file: String,
     pub method_filter: fn(method_name: String) -> bool,
     pub rust_method_type_path: String,
     pub rust_method_prefix: String,
@@ -28,12 +29,13 @@ pub struct BindgenOptions {
     pub csharp_if_dll_name: String,
 }
 
-impl Builder {
+impl Default for Builder {
-    pub fn new() -> Self {
+    fn default() -> Self {
         Self {
             options: BindgenOptions {
                 input_bindgen_file: "".to_string(),
-                method_filter: |x| !x.starts_with("_"),
+                input_extern_file: "".to_string(),
+                method_filter: |x| !x.starts_with('_'),
                 rust_method_type_path: "".to_string(),
                 rust_method_prefix: "".to_string(),
                 rust_file_header: "".to_string(),
@@ -49,6 +51,12 @@ impl Builder {
             },
         }
     }
+}
+
+impl Builder {
+    pub fn new() -> Self {
+        Self::default()
+    }
 
     /// Change an input .rs file(such as generated from bindgen) to generate binding.
     pub fn input_bindgen_file<T: Into<String>>(mut self, input_bindgen_file: T) -> Builder {
@@ -56,7 +64,13 @@ impl Builder {
         self
     }
 
-    /// Filter generate method callback, default is `!x.starts_with("_")`
+    /// Change an input .rs file for collect extern methods to C# binding.
+    pub fn input_extern_file<T: Into<String>>(mut self, input_extern_file: T) -> Builder {
+        self.options.input_extern_file = input_extern_file.into();
+        self
+    }
+
+    /// Filter generate method callback, default is `!x.starts_with('_')`
     pub fn method_filter(mut self, method_filter: fn(method_name: String) -> bool) -> Builder {
         self.options.method_filter = method_filter;
         self
@@ -141,35 +155,63 @@ impl Builder {
         self
     }
 
-    // pub fn generate_csharp_file<T: AsRef<Path>>(&self, csharp_output_path: T) -> io::Result<()> {
+    pub fn generate_csharp_file<P: AsRef<Path>>(
-    //     let mut file = OpenOptions::new()
+        &self,
-    //         .write(true)
+        csharp_output_path: P,
-    //         .truncate(true)
+    ) -> Result<(), Box<dyn Error>> {
-    //         .create(true)
+        if !self.options.input_bindgen_file.is_empty() {
-    //         .open(csharp_output_path.as_ref())?;
+            let (_, csharp) = generate(GenerateKind::InputBindgen, &self.options)?;
 
-    //     let code = self.generate();
+            let mut csharp_file = make_file(csharp_output_path.as_ref())?;
-    //     file.write_all(code.as_bytes())?;
+            csharp_file.write_all(csharp.as_bytes())?;
-    //     file.flush()?;
+            csharp_file.flush()?;
+        }
 
-    //     Ok(())
+        if !self.options.input_extern_file.is_empty() {
-    // }
+            let (_, csharp) = generate(GenerateKind::InputExtern, &self.options)?;
+
+            let mut csharp_file = make_file(csharp_output_path.as_ref())?;
+            csharp_file.write_all(csharp.as_bytes())?;
+            csharp_file.flush()?;
+        }
+
+        Ok(())
+    }
 
     pub fn generate_to_file<P: AsRef<Path>>(
         &self,
         rust_output_path: P,
         csharp_output_path: P,
     ) -> Result<(), Box<dyn Error>> {
-        let (rust, csharp) = generate(&self.options)?;
+        if !self.options.input_bindgen_file.is_empty() {
+            let (rust, csharp) = generate(GenerateKind::InputBindgen, &self.options)?;
 
-        let mut rust_file = make_file(rust_output_path)?;
+            if let Some(rust) = rust {
-        let mut csharp_file = make_file(csharp_output_path)?;
+                let mut rust_file = make_file(rust_output_path.as_ref())?;
 
                 rust_file.write_all(rust.as_bytes())?;
                 rust_file.flush()?;
+            }
 
+            let mut csharp_file = make_file(csharp_output_path.as_ref())?;
             csharp_file.write_all(csharp.as_bytes())?;
             csharp_file.flush()?;
+        }
+
+        if !self.options.input_extern_file.is_empty() {
+            let (rust, csharp) = generate(GenerateKind::InputExtern, &self.options)?;
+
+            if let Some(rust) = rust {
+                let mut rust_file = make_file(rust_output_path.as_ref())?;
+
+                rust_file.write_all(rust.as_bytes())?;
+                rust_file.flush()?;
+            }
+
+            let mut csharp_file = make_file(csharp_output_path.as_ref())?;
+            csharp_file.write_all(csharp.as_bytes())?;
+            csharp_file.flush()?;
+        }
 
         Ok(())
     }

csbindgen/src/emitter.rs

@@ -74,7 +74,7 @@ use ::std::os::raw::*;
     "
     );
 
-    return result;
+    result
 }
 
 pub fn emit_csharp(
@@ -107,14 +107,14 @@ pub fn emit_csharp(
              x => format!("{x}{method_name}"),
         };
         let return_type = match &item.return_type {
-            Some(x) => x.to_csharp_string(&options, &aliases),
+            Some(x) => x.to_csharp_string(options, aliases),
             None => "void".to_string(),
         };
 
         let parameters = item
             .parameters
             .iter()
-            .map(|p| format!("{} {}", p.rust_type.to_csharp_string(&options, &aliases), p.escape_name()))
+            .map(|p| format!("{} {}", p.rust_type.to_csharp_string(options, aliases), p.escape_name()))
             .collect::<Vec<_>>()
             .join(", ");
 
@@ -124,7 +124,7 @@ pub fn emit_csharp(
         method_list_string.push_str_ln(
             format!("        public static extern {return_type} {method_prefix}{method_name}({parameters});").as_str(),
         );
-        method_list_string.push_str("\n");
+        method_list_string.push('\n');
     }
 
     let mut structs_string = String::new();
@@ -147,7 +147,7 @@ pub fn emit_csharp(
             structs_string.push_str(
                 format!(
                     "        public {} {}",
-                    field.rust_type.to_csharp_string(&options, &aliases),
+                    field.rust_type.to_csharp_string(options, aliases),
                     field.name
                 )
                 .as_str(),
@@ -163,7 +163,7 @@ pub fn emit_csharp(
             structs_string.push_str_ln(";");
         }
         structs_string.push_str_ln("    }");
-        structs_string.push_str("\n");
+        structs_string.push('\n');
     }
 
     // TODO: for Unity, `__Intern`.
@@ -189,5 +189,5 @@ namespace {namespace}
     "
     );
 
-    return result;
+    result
 }

csbindgen/src/lib.rs

@@ -11,12 +11,26 @@ use emitter::*;
 use parser::*;
 use std::{collections::HashSet, error::Error};
 
-pub(crate) fn generate(options: &BindgenOptions) -> Result<(String, String), Box<dyn Error>> {
+enum GenerateKind {
-    let path = &options.input_bindgen_file;
+    InputBindgen,
-    let file_content = std::fs::read_to_string(path)?;
+    InputExtern,
+}
+
+pub(crate) fn generate(
+    generate_kind: GenerateKind,
+    options: &BindgenOptions,
+) -> Result<(Option<String>, String), Box<dyn Error>> {
+    let path = match generate_kind{
+        GenerateKind::InputBindgen => &options.input_bindgen_file,
+        GenerateKind::InputExtern => &options.input_extern_file,
+    };
+    let file_content = std::fs::read_to_string(path).expect(("input file not found, path:".to_string() + path).as_str());
     let file_ast = syn::parse_file(file_content.as_str())?;
 
-    let methods = collect_method(&file_ast, options);
+    let (methods, generate_rust) = match generate_kind {
+        GenerateKind::InputBindgen => (collect_foreign_method(&file_ast, options), true),
+        GenerateKind::InputExtern => (collect_extern_method(&file_ast, options), false),
+    };
     let aliases = collect_type_alias(&file_ast);
     let structs = collect_struct(&file_ast);
 
@@ -42,10 +56,14 @@ pub(crate) fn generate(options: &BindgenOptions) -> Result<(String, String), Box
 
     let structs = reduce_struct(&structs, &using_types);
 
-    let rust = emit_rust_method(&methods, &options);
+    let rust = if generate_rust {
-    let csharp = emit_csharp(&methods, &aliases, &structs, &options);
+        Some(emit_rust_method(&methods, options))
+    } else {
+        None
+    };
+    let csharp = emit_csharp(&methods, &aliases, &structs, options);
 
-    return Ok((rust, csharp));
+    Ok((rust, csharp))
 }
 
 // #[test]

csbindgen/src/parser.rs

@@ -2,20 +2,60 @@ use crate::{builder::BindgenOptions, type_meta::*};
 use std::collections::{HashMap, HashSet};
 use syn::{ForeignItem, Item, Pat, ReturnType};
 
-pub fn collect_method(ast: &syn::File, options: &BindgenOptions) -> Vec<ExternMethod> {
+enum FnItem {
+    ForeignItem(syn::ForeignItemFn),
+    Item(syn::ItemFn),
+}
+
+pub fn collect_foreign_method(ast: &syn::File, options: &BindgenOptions) -> Vec<ExternMethod> {
     let mut list: Vec<ExternMethod> = Vec::new();
 
     for item in ast.items.iter() {
         if let Item::ForeignMod(m) = item {
             for item in m.items.iter() {
                 if let ForeignItem::Fn(m) = item {
-                    let method_name = m.sig.ident.to_string();
+                    let method = parse_method(FnItem::ForeignItem(m.clone()), options);
+                    if let Some(x) = method {
+                        list.push(x);
+                    }
+                }
+            }
+        }
+    }
+
+    list
+}
+
+pub fn collect_extern_method(ast: &syn::File, options: &BindgenOptions) -> Vec<ExternMethod> {
+    let mut list: Vec<ExternMethod> = Vec::new();
+
+    for item in ast.items.iter() {
+        if let Item::Fn(m) = item {
+            if let Some(_) = &m.sig.abi { // has extern
+                let method = parse_method(FnItem::Item(m.clone()), options);
+                if let Some(x) = method {
+                    list.push(x);
+                }
+            }
+        }
+    }
+
+    list
+}
+
+fn parse_method(item: FnItem, options: &BindgenOptions) -> Option<ExternMethod> {
+    let sig = match item {
+        FnItem::ForeignItem(x) => x.sig,
+        FnItem::Item(x) => x.sig,
+    };
+
+    let method_name = sig.ident.to_string();
 
     let mut parameters: Vec<Parameter> = Vec::new();
-                    let mut retrun_type: Option<RustType> = None;
+    let mut return_type: Option<RustType> = None;
 
     // argument
-                    for arg in m.sig.inputs.iter() {
+    for arg in sig.inputs.iter() {
         if let syn::FnArg::Typed(t) = arg {
             let mut parameter_name: String = "".to_string();
 
@@ -27,34 +67,30 @@ pub fn collect_method(ast: &syn::File, options: &BindgenOptions) -> Vec<ExternMe
 
             parameters.push(Parameter {
                 name: parameter_name,
-                                rust_type: rust_type,
+                rust_type,
             });
         }
     }
 
     // return
-                    if let ReturnType::Type(_, b) = &m.sig.output {
+    if let ReturnType::Type(_, b) = &sig.output {
-                        let rust_type = parse_type(&b);
+        let rust_type = parse_type(b);
-                        if rust_type.type_name == "" {
+        if rust_type.type_name.is_empty() {
-                            continue;
+            return None;
         }
 
-                        retrun_type = Some(rust_type);
+        return_type = Some(rust_type);
     }
 
-                    if method_name != "" && (&options.method_filter)(method_name.clone()) {
+    if !method_name.is_empty() && (options.method_filter)(method_name.clone()) {
-                        list.push(ExternMethod {
+        return Some(ExternMethod {
-                            method_name: method_name.clone(),
+            method_name,
-                            parameters: parameters,
+            parameters,
-                            return_type: retrun_type,
+            return_type,
         });
     }
-                }
-            }
-        }
-    }
 
-    return list;
+    None
 }
 
 pub fn collect_type_alias(ast: &syn::File) -> Vec<(String, RustType)> {
@@ -85,7 +121,7 @@ pub fn collect_type_alias(ast: &syn::File) -> Vec<(String, RustType)> {
             }
         }
     }
-    return result;
+    result
 }
 
 pub fn collect_struct(ast: &syn::File) -> Vec<RustStruct> {
@@ -94,28 +130,28 @@ pub fn collect_struct(ast: &syn::File) -> Vec<RustStruct> {
 
     for item in ast.items.iter() {
         if let Item::Union(t) = item {
-            let name = t.ident.to_string();
+            let struct_name = t.ident.to_string();
             let fields = collect_fields(&t.fields);
 
             result.push(RustStruct {
-                struct_name: name,
+                struct_name,
-                fields: fields,
+                fields,
                 is_union: true,
             });
         } else if let Item::Struct(t) = item {
             if let syn::Fields::Named(f) = &t.fields {
-                let name = t.ident.to_string();
+                let struct_name = t.ident.to_string();
-                let fields = collect_fields(&f);
+                let fields = collect_fields(f);
                 result.push(RustStruct {
-                    struct_name: name,
+                    struct_name,
-                    fields: fields,
+                    fields,
                     is_union: false,
                 });
             };
         }
     }
 
-    return result;
+    result
 }
 
 fn collect_fields(fields: &syn::FieldsNamed) -> Vec<FieldMember> {
@@ -131,7 +167,7 @@ fn collect_fields(fields: &syn::FieldsNamed) -> Vec<FieldMember> {
         }
     }
 
-    return result;
+    result
 }
 
 pub fn reduce_type_alias(
@@ -152,7 +188,7 @@ pub fn reduce_type_alias(
         }
     }
 
-    return map;
+    map
 }
 
 pub fn reduce_struct(structs: &Vec<RustStruct>, using_types: &HashSet<String>) -> Vec<RustStruct> {
@@ -163,7 +199,7 @@ pub fn reduce_struct(structs: &Vec<RustStruct>, using_types: &HashSet<String>) -
         }
     }
 
-    return result;
+    result
 }
 
 fn parse_type(t: &syn::Type) -> RustType {
@@ -206,13 +242,13 @@ fn parse_type(t: &syn::Type) -> RustType {
         _ => "".to_string(),
     };
 
-    return RustType {
+    RustType {
         is_const: has_const,
         is_mut: has_mut,
         is_pointer: has_star,
         is_pointer_pointer: has_star_star,
-        is_fixed_array: (digits != ""),
+        is_fixed_array: !digits.is_empty(),
         type_name: name,
         fixed_array_digits: digits,
-    };
+    }
 }

csbindgen/src/type_meta.rs

@@ -64,7 +64,7 @@ impl RustType {
         let mut sb = String::new();
 
         if self.is_pointer || self.is_pointer_pointer {
-            sb.push_str("*");
+            sb.push('*');
         }
         if self.is_const {
             sb.push_str("const");
@@ -80,18 +80,19 @@ impl RustType {
             }
         }
 
-        sb.push_str(" ");
+        sb.push(' ');
 
         if self.is_fixed_array {
-            sb.push_str("[");
+            sb.push('[');
             sb.push_str(self.type_name.as_str());
             sb.push_str("; ");
             sb.push_str(self.fixed_array_digits.as_str());
-            sb.push_str("]");
+            sb.push(']');
         } else {
-            if !self.type_name.starts_with("c_")
+            if !(self.type_name.starts_with("c_")
-                && !(self.type_name == "usize" || self.type_name == "isize")
+                || self.type_name == "usize"
-                && !(type_path == "")
+                || self.type_name == "isize"
+                || (type_path.is_empty()))
             {
                 sb.push_str(type_path);
                 sb.push_str("::");
@@ -157,7 +158,7 @@ impl RustType {
         if self.is_fixed_array {
             sb.push_str("fixed ");
 
-            let type_name = convert_type_name(use_type.type_name.as_str(), &options);
+            let type_name = convert_type_name(use_type.type_name.as_str(), options);
             let type_name = match type_name.as_str() {
                 // C# fixed allow types
                 "bool" | "byte" | "short" | "int" | "long" | "char" | "sbyte" | "ushort"
@@ -167,10 +168,10 @@ impl RustType {
 
             sb.push_str(type_name.as_str());
         } else {
-            sb.push_str(convert_type_name(use_type.type_name.as_str(), &options).as_str());
+            sb.push_str(convert_type_name(use_type.type_name.as_str(), options).as_str());
             if use_alias {
                 if use_type.is_pointer {
-                    sb.push_str("*");
+                    sb.push('*');
                 }
                 if use_type.is_pointer_pointer {
                     sb.push_str("**");
@@ -178,7 +179,7 @@ impl RustType {
             }
 
             if self.is_pointer {
-                sb.push_str("*");
+                sb.push('*');
             }
             if self.is_pointer_pointer {
                 sb.push_str("**");

dotnet-sandbox/Program.cs

@@ -7,6 +7,9 @@ unsafe
 {
     //var v = NativeMethods();
 
+    var z = LibRust.my_add(100, 200);
+    Console.WriteLine(z);
+
     var s = LibLz4.LZ4_versionString();
     var ss = new string((sbyte*)s);
     Console.WriteLine(ss);

dotnet-sandbox/lz4_bindgen.cs

@@ -142,6 +142,210 @@ namespace CsBindgen
         [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_resetStream", CallingConvention = CallingConvention.Cdecl)]
         public static extern void LZ4_resetStream(LZ4_stream_u* streamPtr);
 
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compress_HC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compress_HC(byte* src, byte* dst, int srcSize, int dstCapacity, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_sizeofStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_sizeofStateHC();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compress_HC_extStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compress_HC_extStateHC(void* stateHC, byte* src, byte* dst, int srcSize, int maxDstSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compress_HC_destSize", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compress_HC_destSize(void* stateHC, byte* src, byte* dst, int* srcSizePtr, int targetDstSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_createStreamHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern LZ4_streamHC_u* LZ4_createStreamHC();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_freeStreamHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_freeStreamHC(LZ4_streamHC_u* streamHCPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_resetStreamHC_fast", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void LZ4_resetStreamHC_fast(LZ4_streamHC_u* streamHCPtr, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_loadDictHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_loadDictHC(LZ4_streamHC_u* streamHCPtr, byte* dictionary, int dictSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compress_HC_continue", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compress_HC_continue(LZ4_streamHC_u* streamHCPtr, byte* src, byte* dst, int srcSize, int maxDstSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compress_HC_continue_destSize", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compress_HC_continue_destSize(LZ4_streamHC_u* LZ4_streamHCPtr, byte* src, byte* dst, int* srcSizePtr, int targetDstSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_saveDictHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_saveDictHC(LZ4_streamHC_u* streamHCPtr, byte* safeBuffer, int maxDictSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_initStreamHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern LZ4_streamHC_u* LZ4_initStreamHC(void* buffer, UIntPtr size);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC(byte* source, byte* dest, int inputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC_limitedOutput", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC_limitedOutput(byte* source, byte* dest, int inputSize, int maxOutputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2(byte* source, byte* dest, int inputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2_limitedOutput", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2_limitedOutput(byte* source, byte* dest, int inputSize, int maxOutputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC_withStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC_withStateHC(void* state, byte* source, byte* dest, int inputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC_limitedOutput_withStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC_limitedOutput_withStateHC(void* state, byte* source, byte* dest, int inputSize, int maxOutputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2_withStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2_withStateHC(void* state, byte* source, byte* dest, int inputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2_limitedOutput_withStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2_limitedOutput_withStateHC(void* state, byte* source, byte* dest, int inputSize, int maxOutputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC_continue", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC_continue(LZ4_streamHC_u* LZ4_streamHCPtr, byte* source, byte* dest, int inputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC_limitedOutput_continue", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC_limitedOutput_continue(LZ4_streamHC_u* LZ4_streamHCPtr, byte* source, byte* dest, int inputSize, int maxOutputSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_createHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void* LZ4_createHC(byte* inputBuffer);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_freeHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_freeHC(void* LZ4HC_Data);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_slideInputBufferHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern byte* LZ4_slideInputBufferHC(void* LZ4HC_Data);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2_continue", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2_continue(void* LZ4HC_Data, byte* source, byte* dest, int inputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_compressHC2_limitedOutput_continue", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_compressHC2_limitedOutput_continue(void* LZ4HC_Data, byte* source, byte* dest, int inputSize, int maxOutputSize, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_sizeofStreamStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_sizeofStreamStateHC();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_resetStreamStateHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4_resetStreamStateHC(void* state, byte* inputBuffer);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4_resetStreamHC", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void LZ4_resetStreamHC(LZ4_streamHC_u* streamHCPtr, int compressionLevel);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_isError", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint LZ4F_isError(UIntPtr code);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_getErrorName", CallingConvention = CallingConvention.Cdecl)]
+        public static extern byte* LZ4F_getErrorName(UIntPtr code);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressionLevel_max", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int LZ4F_compressionLevel_max();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressFrameBound", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressFrameBound(UIntPtr srcSize, LZ4F_preferences_t* preferencesPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressFrame", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressFrame(void* dstBuffer, UIntPtr dstCapacity, void* srcBuffer, UIntPtr srcSize, LZ4F_preferences_t* preferencesPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_getVersion", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint LZ4F_getVersion();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_createCompressionContext", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_createCompressionContext(LZ4F_cctx_s** cctxPtr, uint version);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_freeCompressionContext", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_freeCompressionContext(LZ4F_cctx_s* cctx);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressBegin", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressBegin(LZ4F_cctx_s* cctx, void* dstBuffer, UIntPtr dstCapacity, LZ4F_preferences_t* prefsPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressBound", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressBound(UIntPtr srcSize, LZ4F_preferences_t* prefsPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressUpdate", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressUpdate(LZ4F_cctx_s* cctx, void* dstBuffer, UIntPtr dstCapacity, void* srcBuffer, UIntPtr srcSize, LZ4F_compressOptions_t* cOptPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_flush", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_flush(LZ4F_cctx_s* cctx, void* dstBuffer, UIntPtr dstCapacity, LZ4F_compressOptions_t* cOptPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_compressEnd", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_compressEnd(LZ4F_cctx_s* cctx, void* dstBuffer, UIntPtr dstCapacity, LZ4F_compressOptions_t* cOptPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_createDecompressionContext", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_createDecompressionContext(LZ4F_dctx_s** dctxPtr, uint version);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_freeDecompressionContext", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_freeDecompressionContext(LZ4F_dctx_s* dctx);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_headerSize", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_headerSize(void* src, UIntPtr srcSize);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_getFrameInfo", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_getFrameInfo(LZ4F_dctx_s* dctx, LZ4F_frameInfo_t* frameInfoPtr, void* srcBuffer, UIntPtr* srcSizePtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_decompress", CallingConvention = CallingConvention.Cdecl)]
+        public static extern UIntPtr LZ4F_decompress(LZ4F_dctx_s* dctx, void* dstBuffer, UIntPtr* dstSizePtr, void* srcBuffer, UIntPtr* srcSizePtr, LZ4F_decompressOptions_t* dOptPtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_LZ4F_resetDecompressionContext", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void LZ4F_resetDecompressionContext(LZ4F_dctx_s* dctx);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH_versionNumber", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint XXH_versionNumber();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint XXH32(void* input, UIntPtr length, uint seed);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_createState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern XXH32_state_s* XXH32_createState();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_freeState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH32_freeState(XXH32_state_s* statePtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_copyState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void XXH32_copyState(XXH32_state_s* dst_state, XXH32_state_s* src_state);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_reset", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH32_reset(XXH32_state_s* statePtr, uint seed);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_update", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH32_update(XXH32_state_s* statePtr, void* input, UIntPtr length);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_digest", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint XXH32_digest(XXH32_state_s* statePtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_canonicalFromHash", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void XXH32_canonicalFromHash(XXH32_canonical_t* dst, uint hash);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH32_hashFromCanonical", CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint XXH32_hashFromCanonical(XXH32_canonical_t* src);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64", CallingConvention = CallingConvention.Cdecl)]
+        public static extern ulong XXH64(void* input, UIntPtr length, ulong seed);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_createState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern XXH64_state_s* XXH64_createState();
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_freeState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH64_freeState(XXH64_state_s* statePtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_copyState", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void XXH64_copyState(XXH64_state_s* dst_state, XXH64_state_s* src_state);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_reset", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH64_reset(XXH64_state_s* statePtr, ulong seed);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_update", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int XXH64_update(XXH64_state_s* statePtr, void* input, UIntPtr length);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_digest", CallingConvention = CallingConvention.Cdecl)]
+        public static extern ulong XXH64_digest(XXH64_state_s* statePtr);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_canonicalFromHash", CallingConvention = CallingConvention.Cdecl)]
+        public static extern void XXH64_canonicalFromHash(XXH64_canonical_t* dst, ulong hash);
+
+        [DllImport(__DllName, EntryPoint = "csbindgen_XXH64_hashFromCanonical", CallingConvention = CallingConvention.Cdecl)]
+        public static extern ulong XXH64_hashFromCanonical(XXH64_canonical_t* src);
+
 
     }
 
@@ -183,6 +387,106 @@ namespace CsBindgen
         public LZ4_streamDecode_t_internal internal_donotuse;
     }
 
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4HC_CCtx_internal
+    {
+        public fixed uint hashTable[32768];
+        public fixed ushort chainTable[65536];
+        public byte* end;
+        public byte* prefixStart;
+        public byte* dictStart;
+        public uint dictLimit;
+        public uint lowLimit;
+        public uint nextToUpdate;
+        public short compressionLevel;
+        public sbyte favorDecSpeed;
+        public sbyte dirty;
+        public LZ4HC_CCtx_internal* dictCtx;
+    }
+
+    [StructLayout(LayoutKind.Explicit)]
+    public unsafe struct LZ4_streamHC_u
+    {
+        [FieldOffset(0)]
+        public fixed byte minStateSize[262200];
+        [FieldOffset(0)]
+        public LZ4HC_CCtx_internal internal_donotuse;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_frameInfo_t
+    {
+        public int blockSizeID;
+        public int blockMode;
+        public int contentChecksumFlag;
+        public int frameType;
+        public ulong contentSize;
+        public uint dictID;
+        public int blockChecksumFlag;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_preferences_t
+    {
+        public LZ4F_frameInfo_t frameInfo;
+        public int compressionLevel;
+        public uint autoFlush;
+        public uint favorDecSpeed;
+        public fixed uint reserved[3];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_cctx_s
+    {
+        public fixed byte _unused[1];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_compressOptions_t
+    {
+        public uint stableSrc;
+        public fixed uint reserved[3];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_dctx_s
+    {
+        public fixed byte _unused[1];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct LZ4F_decompressOptions_t
+    {
+        public uint stableDst;
+        public uint skipChecksums;
+        public uint reserved1;
+        public uint reserved0;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct XXH32_state_s
+    {
+        public fixed byte _unused[1];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct XXH32_canonical_t
+    {
+        public fixed byte digest[4];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct XXH64_state_s
+    {
+        public fixed byte _unused[1];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public unsafe struct XXH64_canonical_t
+    {
+        public fixed byte digest[8];
+    }
+
     
 }
     

dotnet-sandbox/method_call.cs

@@ -0,0 +1,22 @@
+// <auto-generated>
+// This code is generated by csbindgen.
+// DON'T CHANGE THIS DIRECTLY.
+// </auto-generated>
+using System;
+using System.Runtime.InteropServices;
+
+namespace CsBindgen
+{
+    public static unsafe partial class LibRust
+    {
+        const string __DllName = "csbindgen_tests";
+
+        [DllImport(__DllName, EntryPoint = "my_add", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int my_add(int x, int y);
+
+
+    }
+
+    
+}
+