add uniffi CP437Grid, equals

add equals method

add uniffi copy_raw method

crates/servicepoint_binding_uniffi/src/cp437_grid.rs

@@ -0,0 +1,76 @@
+use servicepoint::{DataRef, Grid};
+use std::sync::{Arc, RwLock};
+
+#[derive(uniffi::Object)]
+pub struct Cp437Grid {
+    pub(crate) actual: RwLock<servicepoint::Cp437Grid>,
+}
+
+impl Cp437Grid {
+    fn internal_new(actual: servicepoint::Cp437Grid) -> Arc<Self> {
+        Arc::new(Self {
+            actual: RwLock::new(actual),
+        })
+    }
+}
+
+#[uniffi::export]
+impl Cp437Grid {
+    #[uniffi::constructor]
+    pub fn new(width: u64, height: u64) -> Arc<Self> {
+        Self::internal_new(servicepoint::Cp437Grid::new(
+            width as usize,
+            height as usize,
+        ))
+    }
+
+    #[uniffi::constructor]
+    pub fn load(width: u64, height: u64, data: Vec<u8>) -> Arc<Self> {
+        Self::internal_new(servicepoint::Cp437Grid::load(
+            width as usize,
+            height as usize,
+            &data,
+        ))
+    }
+
+    #[uniffi::constructor]
+    pub fn clone(other: &Arc<Self>) -> Arc<Self> {
+        Self::internal_new(other.actual.read().unwrap().clone())
+    }
+
+    pub fn set(&self, x: u64, y: u64, value: u8) {
+        self.actual
+            .write()
+            .unwrap()
+            .set(x as usize, y as usize, value)
+    }
+
+    pub fn get(&self, x: u64, y: u64) -> u8 {
+        self.actual
+            .read()
+            .unwrap()
+            .get(x as usize, y as usize)
+            .into()
+    }
+
+    pub fn fill(&self, value: u8) {
+        self.actual.write().unwrap().fill(value)
+    }
+    pub fn width(&self) -> u64 {
+        self.actual.read().unwrap().width() as u64
+    }
+
+    pub fn height(&self) -> u64 {
+        self.actual.read().unwrap().height() as u64
+    }
+
+    pub fn equals(&self, other: &Cp437Grid) -> bool {
+        let a = self.actual.read().unwrap();
+        let b = other.actual.read().unwrap();
+        *a == *b
+    }
+
+    pub fn copy_raw(&self) -> Vec<u8> {
+        self.actual.read().unwrap().data_ref().to_vec()
+    }
+}