fix(ext/node): zlib.crc32() (#26856)

Fixes https://github.com/denoland/deno/issues/26845

1 files changed, 10 insertions, 0 deletions

diff --git a/ext/node/ops/zlib/mod.rs b/ext/node/ops/zlib/mod.rs
index e75ef050d..991c0925d 100644
--- a/ext/node/ops/zlib/mod.rs
+++ b/ext/node/ops/zlib/mod.rs
@@ -1,6 +1,7 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
 use deno_core::op2;
+use libc::c_ulong;
 use std::borrow::Cow;
 use std::cell::RefCell;
 use zlib::*;
@@ -381,6 +382,15 @@ pub fn op_zlib_close_if_pending(
   Ok(())
 }
 
+#[op2(fast)]
+#[smi]
+pub fn op_zlib_crc32(#[buffer] data: &[u8], #[smi] value: u32) -> u32 {
+  // SAFETY: `data` is a valid buffer.
+  unsafe {
+    zlib::crc32(value as c_ulong, data.as_ptr(), data.len() as u32) as u32
+  }
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;