import quincy 17.2.0

[ceph.git] / ceph / src / arrow / cpp / src / arrow / util / compression_snappy.cc

diff --git a/ceph/src/arrow/cpp/src/arrow/util/compression_snappy.cc b/ceph/src/arrow/cpp/src/arrow/util/compression_snappy.cc
new file mode 100644 (file)
index 0000000..3756f95
--- /dev/null
+++ b/ceph/src/arrow/cpp/src/arrow/util/compression_snappy.cc
@@ -0,0 +1,102 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include "arrow/util/compression_internal.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+
+#include <snappy.h>
+
+#include "arrow/result.h"
+#include "arrow/status.h"
+#include "arrow/util/logging.h"
+#include "arrow/util/macros.h"
+
+using std::size_t;
+
+namespace arrow {
+namespace util {
+namespace internal {
+
+namespace {
+
+// ----------------------------------------------------------------------
+// Snappy implementation
+
+class SnappyCodec : public Codec {
+ public:
+  Result<int64_t> Decompress(int64_t input_len, const uint8_t* input,
+                             int64_t output_buffer_len, uint8_t* output_buffer) override {
+    size_t decompressed_size;
+    if (!snappy::GetUncompressedLength(reinterpret_cast<const char*>(input),
+                                       static_cast<size_t>(input_len),
+                                       &decompressed_size)) {
+      return Status::IOError("Corrupt snappy compressed data.");
+    }
+    if (output_buffer_len < static_cast<int64_t>(decompressed_size)) {
+      return Status::Invalid("Output buffer size (", output_buffer_len, ") must be ",
+                             decompressed_size, " or larger.");
+    }
+    if (!snappy::RawUncompress(reinterpret_cast<const char*>(input),
+                               static_cast<size_t>(input_len),
+                               reinterpret_cast<char*>(output_buffer))) {
+      return Status::IOError("Corrupt snappy compressed data.");
+    }
+    return static_cast<int64_t>(decompressed_size);
+  }
+
+  int64_t MaxCompressedLen(int64_t input_len,
+                           const uint8_t* ARROW_ARG_UNUSED(input)) override {
+    DCHECK_GE(input_len, 0);
+    return snappy::MaxCompressedLength(static_cast<size_t>(input_len));
+  }
+
+  Result<int64_t> Compress(int64_t input_len, const uint8_t* input,
+                           int64_t ARROW_ARG_UNUSED(output_buffer_len),
+                           uint8_t* output_buffer) override {
+    size_t output_size;
+    snappy::RawCompress(reinterpret_cast<const char*>(input),
+                        static_cast<size_t>(input_len),
+                        reinterpret_cast<char*>(output_buffer), &output_size);
+    return static_cast<int64_t>(output_size);
+  }
+
+  Result<std::shared_ptr<Compressor>> MakeCompressor() override {
+    return Status::NotImplemented("Streaming compression unsupported with Snappy");
+  }
+
+  Result<std::shared_ptr<Decompressor>> MakeDecompressor() override {
+    return Status::NotImplemented("Streaming decompression unsupported with Snappy");
+  }
+
+  Compression::type compression_type() const override { return Compression::SNAPPY; }
+  int minimum_compression_level() const override { return kUseDefaultCompressionLevel; }
+  int maximum_compression_level() const override { return kUseDefaultCompressionLevel; }
+  int default_compression_level() const override { return kUseDefaultCompressionLevel; }
+};
+
+}  // namespace
+
+std::unique_ptr<Codec> MakeSnappyCodec() {
+  return std::unique_ptr<Codec>(new SnappyCodec());
+}
+
+}  // namespace internal
+}  // namespace util
+}  // namespace arrow