1 files changed, 33 insertions, 0 deletions
diff --git a/components/util/debug_utils.rs b/components/util/debug_utils.rs
new file mode 100644
index 00000000000..e8d6cd31fea
--- /dev/null
+++ b/components/util/debug_utils.rs
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::io;
+use std::io::Writer;
+use std::mem;
+use std::mem::size_of;
+use std::slice::raw::buf_as_slice;
+
+fn hexdump_slice(buf: &[u8]) {
+    let mut stderr = io::stderr();
+    stderr.write(b"    ").unwrap();
+    for (i, &v) in buf.iter().enumerate() {
+        let output = format!("{:02X} ", v as uint);
+        stderr.write(output.as_bytes()).unwrap();
+        match i % 16 {
+            15 => { stderr.write(b"\n    ").unwrap(); },
+            7 =>  { stderr.write(b"   ").unwrap(); },
+             _ => ()
+        }
+        stderr.flush().unwrap();
+    }
+    stderr.write(b"\n").unwrap();
+}
+
+pub fn hexdump<T>(obj: &T) {
+    unsafe {
+        let buf: *const u8 = mem::transmute(obj);
+        debug!("dumping at {:p}", buf);
+        buf_as_slice(buf, size_of::<T>(), hexdump_slice);
+    }
+}