Add is_integer (#243)

crates/lune-std-ffi/src/c/c_helper.rs

@@ -12,7 +12,7 @@ use super::{
 use crate::ffi::{ffi_association::get_association, NativeConvert, FFI_STATUS_NAMES};
 
 // Get the NativeConvert handle from the type UserData
-// this is intended to avoid constant table lookups. (eg: struct)
+// this is intended to avoid lookup userdata and lua table every time. (eg: struct)
 // userdata must live longer than the NativeConvert handle.
 // However, c_struct is a strong reference to each field, so this is not a problem.
 pub unsafe fn get_conv(userdata: &LuaAnyUserData) -> LuaResult<*const dyn NativeConvert> {

crates/lune-std-ffi/src/ffi/ffi_box.rs

@@ -1,5 +1,5 @@
 use std::boxed::Box;
-use std::sync::LazyLock;
+use std::sync::OnceLock;
 
 use mlua::prelude::*;
 
@@ -10,13 +10,18 @@ use super::{
     NativeDataHandle,
 };
 
-static BOX_REF_FLAGS: LazyLock<FfiRefFlagList> = LazyLock::new(|| {
-    FfiRefFlagList::new(&[
-        FfiRefFlag::Offsetable,
-        FfiRefFlag::Readable,
-        FfiRefFlag::Writable,
-    ])
-});
+static BOX_REF_FLAGS: OnceLock<FfiRefFlagList> = OnceLock::new();
+fn get_box_ref_flags() -> FfiRefFlagList {
+    BOX_REF_FLAGS
+        .get_or_init(|| {
+            FfiRefFlagList::new(&[
+                FfiRefFlag::Offsetable,
+                FfiRefFlag::Readable,
+                FfiRefFlag::Writable,
+            ])
+        })
+        .to_owned()
+}
 
 // It is an untyped, sized memory area that Lua can manage.
 // This area is safe within Lua. Operations have their boundaries checked.
@@ -93,8 +98,7 @@ impl FfiBox {
         // To deref a box space is to allow lua to read any space,
         // which has security issues and is ultimately dangerous.
         // Therefore, box:ref():deref() is not allowed.
-        let luaref =
-            lua.create_userdata(FfiRef::new(ptr.cast(), (*BOX_REF_FLAGS).clone(), bounds))?;
+        let luaref = lua.create_userdata(FfiRef::new(ptr.cast(), get_box_ref_flags(), bounds))?;
 
         // Makes box alive longer then ref
         set_association(lua, REF_INNER, &luaref, &this)?;
@@ -114,7 +118,7 @@ impl FfiBox {
 
     // Get raw ptr
     pub fn get_ptr(&self) -> *mut u8 {
-        self.data.as_ptr() as *mut u8
+        self.data.as_ptr().cast_mut()
     }
 }
 
@@ -134,7 +138,7 @@ impl NativeDataHandle for FfiBox {
         true
     }
     unsafe fn get_pointer(&self, offset: isize) -> *mut () {
-        self.get_ptr().byte_offset(offset) as *mut ()
+        self.get_ptr().byte_offset(offset).cast::<()>()
     }
 }
 

crates/lune-std-ffi/src/ffi/ffi_func.rs

@@ -0,0 +1,3 @@
+struct FfiFunc {
+    args: Vec,
+}

crates/lune-std-ffi/src/ffi/ffi_lib.rs

@@ -64,7 +64,7 @@ impl FfiLib {
 
 impl LuaUserData for FfiLib {
     fn add_methods<'lua, M: LuaUserDataMethods<'lua, Self>>(methods: &mut M) {
-        methods.add_function("dlsym", |lua, (this, name): (LuaAnyUserData, String)| {
+        methods.add_function("find", |lua, (this, name): (LuaAnyUserData, String)| {
             let luasym = FfiLib::get_sym(lua, this, name)?;
             Ok(luasym)
         });

crates/lune-std-ffi/src/ffi/ffi_native/call.rs

@@ -0,0 +1,19 @@
+use std::cell::Ref;
+
+use mlua::prelude::*;
+
+use super::NativeDataHandle;
+
+// Handle native data, provide type conversion between luavalue and native types
+pub trait NativeCall {
+    // Call native function
+    unsafe fn call_native(
+        &self,
+        lua: &Lua,
+        arg: LuaMultiValue,
+        ret: &Ref<dyn NativeDataHandle>,
+    ) -> LuaResult<()>;
+
+    // Call lua closure
+    unsafe fn call_lua(&self, lua: &Lua, arg: LuaMultiValue, ret: *mut ()) -> LuaResult<()>;
+}

crates/lune-std-ffi/src/ffi/ffi_native/mod.rs

@@ -1,3 +1,4 @@
+mod call;
 mod cast;
 mod convert;
 mod readwrite;
@@ -13,6 +14,6 @@ pub trait NativeSignedness {
 }
 
 pub use self::{
-    cast::native_num_cast, convert::NativeConvert, readwrite::GetNativeDataHandle,
-    readwrite::NativeDataHandle,
+    call::NativeCall, cast::native_num_cast, convert::NativeConvert,
+    readwrite::GetNativeDataHandle, readwrite::NativeDataHandle,
 };

crates/lune-std-ffi/src/ffi/mod.rs

@@ -5,6 +5,8 @@ mod ffi_native;
 mod ffi_raw;
 mod ffi_ref;
 
+use mlua::prelude::*;
+
 pub use self::{
     ffi_box::FfiBox,
     ffi_lib::FfiLib,
@@ -48,3 +50,7 @@ pub mod bit_mask {
 
     pub(crate) use U8_TEST;
 }
+
+pub fn is_integer(num: LuaValue) -> bool {
+    num.is_integer()
+}

crates/lune-std-ffi/src/lib.rs

@@ -8,7 +8,7 @@ mod ffi;
 
 use crate::{
     c::{create_all_c_types, create_all_types, CFn, CStruct},
-    ffi::{create_nullptr, FfiBox, FfiLib},
+    ffi::{create_nullptr, is_integer, FfiBox, FfiLib},
 };
 
 /**
@@ -25,7 +25,7 @@ pub fn module(lua: &Lua) -> LuaResult<LuaTable> {
         .with_value("nullptr", create_nullptr(lua)?)?
         .with_function("box", |_, size: usize| Ok(FfiBox::new(size)))?
         // TODO: discuss about function name. matching with io.open is better?
-        .with_function("dlopen", |_, name: String| {
+        .with_function("open", |_, name: String| {
             let lib = FfiLib::new(name)?;
             Ok(lib)
         })?
@@ -33,6 +33,7 @@ pub fn module(lua: &Lua) -> LuaResult<LuaTable> {
             let cstruct = CStruct::new_from_lua_table(lua, types)?;
             Ok(cstruct)
         })?
+        .with_function("isInteger", |_lua, num: LuaValue| Ok(is_integer(num)))?
         .with_function("fn", |lua, (args, ret): (LuaTable, LuaAnyUserData)| {
             let cfn = CFn::new_from_lua_table(lua, args, ret)?;
             Ok(cfn)