From 6996495c1b0b6b362d4dbca8436a1d641fa36a1f Mon Sep 17 00:00:00 2001
From: Jay Zhuang <zjay@fb.com>
Date: Wed, 16 Mar 2022 21:16:12 -0700
Subject: [PATCH] Minor fix for Windows build with zlib (#9699)

Summary:
```
conversion from 'size_t' to 'uLong', possible loss of data
```

Fix https://github.com/facebook/rocksdb/issues/9688

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9699

Reviewed By: riversand963

Differential Revision: D34901116

Pulled By: jay-zhuang

fbshipit-source-id: 969148a7a8c023449bd85055a1f0eec71d0a9b3f
---
 util/compression.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/util/compression.h b/util/compression.h
index 1effb8605..fbe9edbb9 100644
--- a/util/compression.h
+++ b/util/compression.h
@@ -778,7 +778,8 @@ inline bool Zlib_Compress(const CompressionInfo& info,
   }
 
   // Get an upper bound on the compressed size.
-  size_t upper_bound = deflateBound(&_stream, length);
+  size_t upper_bound =
+      deflateBound(&_stream, static_cast<unsigned long>(length));
   output->resize(output_header_len + upper_bound);
 
   // Compress the input, and put compressed data in output.