From a0e1e82ce763e121dfa86d087ec9d7143b9e7490 Mon Sep 17 00:00:00 2001
From: Ji-Xinyou <jerryji0414@outlook.com>
Date: Thu, 20 Jul 2023 03:23:53 +0800
Subject: [PATCH] prevent breaking swift and zig ci

---
 bindings/c/include/opendal.h | 2 +-
 bindings/c/src/types.rs      | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/bindings/c/include/opendal.h b/bindings/c/include/opendal.h
index 4b24bdedfdd5..d5df0f498b92 100644
--- a/bindings/c/include/opendal.h
+++ b/bindings/c/include/opendal.h
@@ -191,7 +191,7 @@ typedef struct opendal_bytes {
   /**
    * Pointing to the byte array on heap
    */
-  uint8_t *data;
+  const uint8_t *data;
   /**
    * The length of the byte array
    */
diff --git a/bindings/c/src/types.rs b/bindings/c/src/types.rs
index 6f172451ebe3..a9b45fcd2711 100644
--- a/bindings/c/src/types.rs
+++ b/bindings/c/src/types.rs
@@ -92,7 +92,7 @@ impl From<*mut od::BlockingOperator> for opendal_operator_ptr {
 #[repr(C)]
 pub struct opendal_bytes {
     /// Pointing to the byte array on heap
-    pub data: *mut u8,
+    pub data: *const u8,
     /// The length of the byte array
     pub len: usize,
 }
@@ -100,7 +100,7 @@ pub struct opendal_bytes {
 impl opendal_bytes {
     /// Construct a [`opendal_bytes`] from the Rust [`Vec`] of bytes
     pub(crate) fn new(vec: Vec<u8>) -> Self {
-        let data = vec.as_ptr() as *mut u8;
+        let data = vec.as_ptr();
         let len = vec.len();
         std::mem::forget(vec);
         Self { data, len }
@@ -110,8 +110,9 @@ impl opendal_bytes {
     #[no_mangle]
     pub extern "C" fn opendal_bytes_free(ptr: *mut opendal_bytes) {
         if !ptr.is_null() {
+            let data_mut = unsafe { (*ptr).data as *mut u8 };
             // free the vector
-            let _ = unsafe { Vec::from_raw_parts((*ptr).data, (*ptr).len, (*ptr).len) };
+            let _ = unsafe { Vec::from_raw_parts(data_mut, (*ptr).len, (*ptr).len) };
             // free the pointer
             let _ = unsafe { Box::from_raw(ptr) };
         }