Merge pull request #15481 from ziglang/use-mem-intrinsics

actually use the new memory intrinsics

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/std/compress/deflate.zig b/lib/std/compress/deflate.zig
index 7b079a6039..2fe5969067 100644
--- a/lib/std/compress/deflate.zig
+++ b/lib/std/compress/deflate.zig
@@ -12,6 +12,20 @@ pub const Decompressor = inflate.Decompressor;
 pub const compressor = deflate.compressor;
 pub const decompressor = inflate.decompressor;
 
+/// Copies elements from a source `src` slice into a destination `dst` slice.
+/// The copy never returns an error but might not be complete if the destination is too small.
+/// Returns the number of elements copied, which will be the minimum of `src.len` and `dst.len`.
+/// TODO: remove this smelly function
+pub fn copy(dst: []u8, src: []const u8) usize {
+    if (dst.len <= src.len) {
+        @memcpy(dst, src[0..dst.len]);
+        return dst.len;
+    } else {
+        @memcpy(dst[0..src.len], src);
+        return src.len;
+    }
+}
+
 test {
     _ = @import("deflate/token.zig");
     _ = @import("deflate/bits_utils.zig");