ffi: wrap unsafe FFI functions in safe wrappers

src/wrappers/point.rs

@@ -1,29 +1,12 @@
-/*
-    SPDX-License-Identifier: AGPL-3.0-or-later
-    Copyright (C) 2025 Erick Ahmed
-*/
+mod ffi_point {
+    use std::os::raw::c_double;
 
-use std::os::raw::c_double;
+    #[repr(C)]
+    pub(crate) struct PointShape {
+        _private: [u8; 0],
+    }
 
-// FFI bindings
-
-#[repr(C)]
-pub struct PointShape {
-    _private: [u8; 0],
-}
-
-extern "C" {
-    pub fn make_point(x: c_double, y: c_double, z: c_double) -> *mut PointShape;
-    pub fn coord_point(
-        shape: *const PointShape,
-        x: *mut c_double,
-        y: *mut c_double,
-        z: *mut c_double,
-    );
-    pub fn delete_point(shape: *mut PointShape);
-}
-
-    extern "C" {
+    unsafe extern "C" {
         fn make_point(x: c_double, y: c_double, z: c_double) -> *mut PointShape;
         fn coord_point(
             shape: *const PointShape,
@@ -34,47 +17,43 @@ extern "C" {
         fn delete_point(shape: *mut PointShape);
     }
 
-pub struct Point {
-    ptr: *mut PointShape,
-}
+    // Safe wrapper
 
-impl Point {
-    pub fn new(x: f64, y: f64, z: f64) -> Self {
-        unsafe {
-            let ptr = make_point(x, y, z);
-            if ptr.is_null() {
-                panic!("Error: null pointer");
+    pub struct Point {
+        ptr: *mut PointShape,
+    }
+
+    impl Point {
+        pub fn new(x: f64, y: f64, z: f64) -> Result<Self, &'static str> {
+            unsafe {
+                let ptr = make_point(x, y, z);
+                if ptr.is_null() {
+                    Err("Error: null pointer returned")
+                } else {
+                    Ok(Point { ptr })
+                }
+            }
+        }
+
+        pub fn coordinates(&self) -> (f64, f64, f64) {
+            unsafe {
+                let mut x = 0.0;
+                let mut y = 0.0;
+                let mut z = 0.0;
+                coord_point(self.ptr, &mut x, &mut y, &mut z);
+                (x, y, z)
             }
-            Self { ptr }
         }
     }
 
-    pub fn coordinates(&self) -> (f64, f64, f64) {
-        unsafe {
-            let mut x = 0.0;
-            let mut y = 0.0;
-            let mut z = 0.0;
-
-            coord_point(self.ptr, &mut x, &mut y, &mut z);
-            (x, y, z)
+    impl Drop for Point {
+        fn drop(&mut self) {
+            unsafe {
+                delete_point(self.ptr);
+            }
         }
     }
-}
 
-impl Drop for Point {
-    fn drop(&mut self) {
-        unsafe {
-            delete_point(self.ptr);
-        }
-    }
+    unsafe impl Send for Point {}
+    unsafe impl Sync for Point {}
 }
-
-impl Clone for Point {
-    fn clone(&self) -> Self {
-        let (x, y, z) = self.coordinates();
-        Self::new(x, y, z)
-    }
-}
-
-unsafe impl Send for Point {}
-unsafe impl Sync for Point {}