Automatic Code Transformation Module #4

Author: BDadmehr0

input.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// Pointer Usage
+void pointer_example() {
+    int a = 10;
+    int* ptr = &a;
+    printf("%d\n", *ptr);
+}
+
+// Dynamic Memory Allocation
+void memory_example() {
+    int* arr = (int*)malloc(5 * sizeof(int));
+    for (int i = 0; i < 5; i++) {
+        arr[i] = i * 2;
+        printf("%d ", arr[i]);
+    }
+    free(arr);
+}
+
+// Struct Example
+struct Point {
+    int x;
+    int y;
+};
+
+// Function Example
+void function_example(struct Point p) {
+    printf("Point(%d, %d)\n", p.x, p.y);
+}
+
+int main() {
+    pointer_example();
+    memory_example();
+    struct Point p = {10, 20};
+    function_example(p);
+    return 0;
+}

src/lib.rs

@@ -1,2 +1,2 @@
 pub mod parser;
-
+pub mod rewriting;

src/parser/clang_parser.rs

@@ -1,6 +1,4 @@
-use clang_sys::support::Clang;
 use std::path::Path;
-use std::ffi::CString;
 use std::process::{Command, Stdio};
 use std::io::Write; // وارد کردن Write برای استفاده از متد write_all
 

src/rewriting.rs

@@ -0,0 +1,21 @@
+// src/rewriting.rs
+
+pub fn rewrite_c_to_rust(ast: &str) -> String {
+    let mut result = ast.to_string();
+
+    // تبدیل اشاره‌گرها به مرجع در Rust
+    result = result.replace("int* ", "&i32 ");  // نمونه ساده برای اشاره‌گرها
+
+    // تبدیل malloc به Box
+    result = result.replace("malloc(", "Box::new(");
+    // حذف free
+    result = result.replace("free(", "");
+
+    // تبدیل sizeof(int) به sizeof(i32) به شکل مورد نظر شما
+    result = result.replace("sizeof(int)", "sizeof(i32)");
+
+    // تبدیل حلقه‌های for به Rust
+    result = result.replace("for (int i = 0; i < n; i++)", "for i in 0..n");
+
+    result
+}

tests/rewriting_test.rs

@@ -0,0 +1,24 @@
+// tests/rewriting_test.rs
+
+use crown::rewriting::rewrite_c_to_rust;
+
+#[test]
+fn test_rewrite_pointer() {
+    let c_code = "int* ptr;";
+    let rust_code = rewrite_c_to_rust(c_code);
+    assert_eq!(rust_code, "&i32 ptr;");
+}
+
+#[test]
+fn test_rewrite_malloc() {
+    let c_code = "malloc(sizeof(int));";
+    let rust_code = rewrite_c_to_rust(c_code);
+    assert_eq!(rust_code, "Box::new(sizeof(i32));");
+}
+
+#[test]
+fn test_rewrite_for_loop() {
+    let c_code = "for (int i = 0; i < n; i++) { ... }";
+    let rust_code = rewrite_c_to_rust(c_code);
+    assert_eq!(rust_code, "for i in 0..n { ... }");
+}