		@@ -25,3 +25,4 @@ # ffi-rs
		- Support modify data in place 🥸
		- Provide many ways to handle pointer type directly
		- Provide many ways to handle pointer type directly 🐮
		- Support output [errno](#errno) info 🤔️

		@@ -79,3 +80,3 @@ ## benchmark

		If you want to call C++ function, see [tutorial](#C++)
		If you want to call C++ function whose argument type is class, you can use `pointer` type, see [tutorial](#C++)

		@@ -103,3 +104,3 @@ ## Support Platform

		### write C/C++ code
		### write foreign function code

		@@ -647,1 +648,19 @@ Note: The return value type of a function must be of type c
		```

		## errno

		By default, `ffi-rs` will not output [errno](https://man7.org/linux/man-pages/man3/errno.3.html) info, developers can get it by pass `errno: true` when call open method like

		```js
		load({
		library: 'libnative',
		funcName: 'setsockopt',
		retType: DataType.I32,
		paramsType: [DataType.I32, DataType.I32, DataType.I32, DataType.External, DataType.I32],
		paramsValue: [socket._handle.fd, level, option, pointer[0], 4],
		errno: true // set errno as true
		})

		// The above code will return a object include three fields include errnoCode, errnoMessage, and the foreign function return value
		// { errnoCode: 22, errnoMessage: 'Invalid argument (os error 22)', value: -1 }
		```

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