decompress(): Use a Source and Sink

This allows decompression to happen in O(1) memory.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/libutil/compression.hh b/src/libutil/compression.hh
index a0d7530d74fc..f7a3e3fbd32e 100644
--- a/src/libutil/compression.hh
+++ b/src/libutil/compression.hh
@@ -8,10 +8,12 @@
 
 namespace nix {
 
-ref<std::string> compress(const std::string & method, const std::string & in, const bool parallel = false);
-
 ref<std::string> decompress(const std::string & method, const std::string & in);
 
+void decompress(const std::string & method, Source & source, Sink & sink);
+
+ref<std::string> compress(const std::string & method, const std::string & in, const bool parallel = false);
+
 struct CompressionSink : BufferedSink
 {
     virtual void finish() = 0;