1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/nix/src/libutil/compression.hh b/third_party/nix/src/libutil/compression.hh
new file mode 100644
index 000000000000..8ec340ab7447
--- /dev/null
+++ b/third_party/nix/src/libutil/compression.hh
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <string>
+
+#include "libutil/ref.hh"
+#include "libutil/serialise.hh"
+#include "libutil/types.hh"
+
+namespace nix {
+
+struct CompressionSink : BufferedSink {
+  virtual void finish() = 0;
+};
+
+ref<std::string> decompress(const std::string& method, const std::string& in);
+
+ref<CompressionSink> makeDecompressionSink(const std::string& method,
+                                           Sink& nextSink);
+
+ref<std::string> compress(const std::string& method, const std::string& in,
+                          const bool parallel = false);
+
+ref<CompressionSink> makeCompressionSink(const std::string& method,
+                                         Sink& nextSink,
+                                         const bool parallel = false);
+
+MakeError(UnknownCompressionMethod, Error);
+
+MakeError(CompressionError, Error);
+
+}  // namespace nix