chore(release): prepare public source release

vendor/tree-sitter/binding_rust/util.rs

@@ -0,0 +1,45 @@
+use core::ffi::c_void;
+
+use super::FREE_FN;
+
+/// A raw pointer and a length, exposed as an iterator.
+pub struct CBufferIter<T> {
+    ptr: *mut T,
+    count: usize,
+    i: usize,
+}
+
+impl<T> CBufferIter<T> {
+    pub const unsafe fn new(ptr: *mut T, count: usize) -> Self {
+        Self { ptr, count, i: 0 }
+    }
+}
+
+impl<T: Copy> Iterator for CBufferIter<T> {
+    type Item = T;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let i = self.i;
+        if i >= self.count {
+            None
+        } else {
+            self.i += 1;
+            Some(unsafe { *self.ptr.add(i) })
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let remaining = self.count - self.i;
+        (remaining, Some(remaining))
+    }
+}
+
+impl<T: Copy> ExactSizeIterator for CBufferIter<T> {}
+
+impl<T> Drop for CBufferIter<T> {
+    fn drop(&mut self) {
+        if !self.ptr.is_null() {
+            unsafe { (FREE_FN)(self.ptr.cast::<c_void>()) };
+        }
+    }
+}