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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef RICE_DELTA_DECODER_H
+#define RICE_DELTA_DECODER_H
+
+namespace mozilla {
+namespace safebrowsing {
+
+class RiceDeltaDecoder {
+public:
+ // This decoder is tailored for safebrowsing v4, including the
+ // bit reading order and how the remainder part is interpreted.
+ // The caller just needs to feed the byte stream received from
+ // network directly. Note that the input buffer must be mutable
+ // since the decoder will do some pre-processing before decoding.
+ RiceDeltaDecoder(uint8_t* aEncodedData, size_t aEncodedDataSize);
+
+ // @param aNumEntries The number of values to be decoded, not including
+ // the first value.
+ // @param aDecodedData A pre-allocated output buffer. Note that
+ // aDecodedData[0] will be filled with |aFirstValue|
+ // and the buffer length (in byte) should be
+ // ((aNumEntries + 1) * sizeof(uint32_t)).
+ bool Decode(uint32_t aRiceParameter,
+ uint32_t aFirstValue,
+ uint32_t aNumEntries,
+ uint32_t* aDecodedData);
+
+private:
+ uint8_t* mEncodedData;
+ size_t mEncodedDataSize;
+};
+
+} // namespace safebrowsing
+} // namespace mozilla
+
+#endif // UPDATE_V4_DECODER_H