Add PZstandard to contrib/

contrib/pzstd/Options.h

@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) 2016-present, 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.
+ */
+#pragma once
+
+#define ZSTD_STATIC_LINKING_ONLY
+#include "zstd.h"
+#undef ZSTD_STATIC_LINKING_ONLY
+
+#include <cstdint>
+#include <string>
+
+namespace pzstd {
+
+struct Options {
+  unsigned numThreads;
+  unsigned maxWindowLog;
+  unsigned compressionLevel;
+  bool decompress;
+  std::string inputFile;
+  std::string outputFile;
+  bool overwrite;
+  bool pzstdHeaders;
+
+  Options();
+  Options(
+      unsigned numThreads,
+      unsigned maxWindowLog,
+      unsigned compressionLevel,
+      bool decompress,
+      const std::string& inputFile,
+      const std::string& outputFile,
+      bool overwrite,
+      bool pzstdHeaders)
+      : numThreads(numThreads),
+        maxWindowLog(maxWindowLog),
+        compressionLevel(compressionLevel),
+        decompress(decompress),
+        inputFile(inputFile),
+        outputFile(outputFile),
+        overwrite(overwrite),
+        pzstdHeaders(pzstdHeaders) {}
+
+  bool parse(int argc, const char** argv);
+
+  ZSTD_parameters determineParameters() const {
+    ZSTD_parameters params = ZSTD_getParams(compressionLevel, 0, 0);
+    if (maxWindowLog != 0 && params.cParams.windowLog > maxWindowLog) {
+      params.cParams.windowLog = maxWindowLog;
+      params.cParams = ZSTD_adjustCParams(params.cParams, 0, 0);
+    }
+    return params;
+  }
+};
+}