1 files changed, 45 insertions, 0 deletions
diff --git a/vendor/tendril/src/util.rs b/vendor/tendril/src/util.rs
new file mode 100644
index 000000000..28c55c128
--- /dev/null
+++ b/vendor/tendril/src/util.rs
@@ -0,0 +1,45 @@
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::mem;
+use std::{ptr, slice};
+
+#[inline(always)]
+pub unsafe fn unsafe_slice<'a>(buf: &'a [u8], start: usize, new_len: usize) -> &'a [u8] {
+    debug_assert!(start <= buf.len());
+    debug_assert!(new_len <= (buf.len() - start));
+    slice::from_raw_parts(buf.as_ptr().offset(start as isize), new_len)
+}
+
+#[inline(always)]
+pub unsafe fn unsafe_slice_mut<'a>(
+    buf: &'a mut [u8],
+    start: usize,
+    new_len: usize,
+) -> &'a mut [u8] {
+    debug_assert!(start <= buf.len());
+    debug_assert!(new_len <= (buf.len() - start));
+    slice::from_raw_parts_mut(buf.as_mut_ptr().offset(start as isize), new_len)
+}
+
+#[inline(always)]
+pub unsafe fn copy_and_advance(dest: &mut *mut u8, src: &[u8]) {
+    ptr::copy_nonoverlapping(src.as_ptr(), *dest, src.len());
+    *dest = dest.offset(src.len() as isize)
+}
+
+#[inline(always)]
+pub unsafe fn copy_lifetime_mut<'a, S: ?Sized, T: ?Sized + 'a>(
+    _ptr: &'a mut S,
+    ptr: &mut T,
+) -> &'a mut T {
+    mem::transmute(ptr)
+}
+
+#[inline(always)]
+pub unsafe fn copy_lifetime<'a, S: ?Sized, T: ?Sized + 'a>(_ptr: &'a S, ptr: &T) -> &'a T {
+    mem::transmute(ptr)
+}