RunCode/mem_cpy/src/lib.rs - main - LavrGov/csharp_ob

RunCode/mem_cpy/src/lib.rs
75 строк2 KB
Lavrentiy
Add mem_cpy
03 июн 2025, 22:55
03 июн 2025, 22:557fc7f70
use core::ffi;
use std::{ffi::c_char, os::raw::c_void};
use libc::{c_int, c_longlong, memcpy};

pub fn add(left: u64, right: u64) -> u64 {
    left + right
}

fn print_byte(data: * const u8) {
    unsafe {
        let new_slice = std::slice::from_raw_parts(data, 30);
        println!("{:?}", new_slice);
    }
}

#[unsafe(no_mangle)]
pub extern "C" fn ffi_mem_num(dst: c_longlong, src: c_longlong, size: c_int) {
    unsafe {
        let new_dst = dst as * mut c_void;
        let new_src = src as * const c_void;
        //println!("ptr_dst: {}", dst);
        //println!("ptr_src: {}", src);
        //println!("char src: {}",*(( src as usize + 8) as * const usize));
        //let test = Test::new(234);
        //print!("test_ptr: ");
        //print_byte(& test as * const Test as * const u8);
        //print!("\n");
        print_byte(new_dst as * const u8);
        print_byte(new_src as * const u8);

        //print_byte(new_src as * const u8);
        //println!("ptr: {}", dst);
        //println!("Data: {}", *(new_dst as * const i32));
        ffi_mem(new_dst, new_src, size);
    }
}

#[unsafe(no_mangle)]
extern "C" fn ffi_mem(dst: * mut c_void, src: * const c_void, size: ffi::c_int) {
    unsafe {
        memcpy(dst, src, size as usize);
    }
}

struct Test {
    test: i32
}

impl Test {
    fn new(item: i32) -> Self {
        Self {test: item}
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_works() {
        unsafe {
            let t1 = Test::new(12);
            let t2 = Test::new(23434);
            let t1_ptr = &t1 as * const Test as * mut Test;
            let dst = t1_ptr as * mut c_void;
            let src = &t2 as * const Test;
            let src = src as * const c_void;
            ffi_mem(dst, src, size_of_val(& t2) as i32);
            assert_eq!(*(t1_ptr as * const i32), 23434);

        }
        //let result = add(2, 2);
        //assert_eq!(result, 4);
    }
}