facebook · Cyan4973 · Aug 19, 2017 · Aug 18, 2017 · Aug 18, 2017
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -39,4 +39,4 @@ outlined on that page and do not file a public issue.
 
 ## License
 By contributing to Zstandard, you agree that your contributions will be licensed
-under the [LICENSE](LICENSE) file in the root directory of this source tree.
+under both the [LICENSE](LICENSE) file and the [COPYING](COPYING) file in the root directory of this source tree.
diff --git a/COPYING b/COPYING
diff --git a/PATENTS b/PATENTS
diff --git a/README.md b/README.md
@@ -134,12 +134,12 @@ Going into `build` directory, you will find additional possibilities :
 
 ### Status
 
-Zstandard is currently deployed within Facebook. It is used daily to compress and decompress very large amounts of data in multiple formats and use cases.
+Zstandard is currently deployed within Facebook. It is used continuously to compress large amounts of data in multiple formats and use cases.
 Zstandard is considered safe for production environments.
 
 ### License
 
-Zstandard is [BSD-licensed](LICENSE). We also provide an [additional patent grant](PATENTS).
+Zstandard is dual-licensed under [BSD](LICENSE) and [GPLv2](COPYING).
 
 ### Contributing
 

diff --git a/examples/dictionary_compression.c b/examples/dictionary_compression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/examples/dictionary_decompression.c b/examples/dictionary_decompression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/examples/multiple_streaming_compression.c b/examples/multiple_streaming_compression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/examples/simple_compression.c b/examples/simple_compression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/examples/simple_decompression.c b/examples/simple_decompression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 #include <stdlib.h>    // malloc, exit

diff --git a/examples/streaming_compression.c b/examples/streaming_compression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/examples/streaming_decompression.c b/examples/streaming_decompression.c
@@ -1,9 +1,10 @@
-/**
- * Copyright 2016-present, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the license found in the
- * LICENSE-examples file in the root directory of this source tree.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/common/compiler.h b/lib/common/compiler.h
@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ */
+
 #ifndef ZSTD_COMPILER_H
 #define ZSTD_COMPILER_H
 

diff --git a/lib/common/error_private.c b/lib/common/error_private.c
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 /* The purpose of this file is to have a single list of error strings embedded in binary */

diff --git a/lib/common/error_private.h b/lib/common/error_private.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 /* Note : this module is expected to remain private, do not expose it */

diff --git a/lib/common/mem.h b/lib/common/mem.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 #ifndef MEM_H_MODULE

diff --git a/lib/common/pool.c b/lib/common/pool.c
@@ -1,10 +1,10 @@
-/**
- * Copyright (c) 2016-present, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/common/pool.h b/lib/common/pool.h
@@ -1,11 +1,12 @@
-/**
- * Copyright (c) 2016-present, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
+
 #ifndef POOL_H
 #define POOL_H
 

diff --git a/lib/common/threading.h b/lib/common/threading.h
@@ -1,4 +1,3 @@
-
 /**
  * Copyright (c) 2016 Tino Reichardt
  * All rights reserved.

diff --git a/lib/common/zstd_common.c b/lib/common/zstd_common.c
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/common/zstd_errors.h b/lib/common/zstd_errors.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 #ifndef ZSTD_ERRORS_H_398273423

diff --git a/lib/common/zstd_internal.h b/lib/common/zstd_internal.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 #ifndef ZSTD_CCOMMON_H_MODULE

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/compress/zstd_opt.h b/lib/compress/zstd_opt.h
@@ -1,10 +1,10 @@
-/**
- * Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/compress/zstdmt_compress.h b/lib/compress/zstdmt_compress.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
  #ifndef ZSTDMT_COMPRESS_H

diff --git a/lib/decompress/zstd_decompress.c b/lib/decompress/zstd_decompress.c
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 

diff --git a/lib/deprecated/zbuff.h b/lib/deprecated/zbuff.h
@@ -1,10 +1,10 @@
-/**
+/*
  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
  */
 
 /* ***************************************************************