mirror of
https://github.com/dart-lang/sdk
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132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_BIN_FILTER_H_
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#define RUNTIME_BIN_FILTER_H_
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#include "bin/builtin.h"
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#include "bin/utils.h"
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#include "zlib/zlib.h"
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namespace dart {
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namespace bin {
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class Filter {
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public:
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virtual ~Filter() {}
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virtual bool Init() = 0;
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/**
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* On a successful call to Process, Process will take ownership of data. On
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* successive calls to either Processed or ~Filter, data will be freed with
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* a delete[] call.
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*/
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virtual bool Process(uint8_t* data, intptr_t length) = 0;
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virtual intptr_t Processed(uint8_t* buffer,
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intptr_t length,
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bool finish,
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bool end) = 0;
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static Dart_Handle SetFilterAndCreateFinalizer(Dart_Handle filter,
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Filter* filter_pointer,
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intptr_t filter_size);
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static Dart_Handle GetFilterNativeField(Dart_Handle filter,
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Filter** filter_pointer);
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bool initialized() const { return initialized_; }
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void set_initialized(bool value) { initialized_ = value; }
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uint8_t* processed_buffer() { return processed_buffer_; }
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intptr_t processed_buffer_size() const { return kFilterBufferSize; }
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protected:
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Filter() : initialized_(false) {}
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private:
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static const intptr_t kFilterBufferSize = 64 * KB;
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uint8_t processed_buffer_[kFilterBufferSize];
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bool initialized_;
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DISALLOW_COPY_AND_ASSIGN(Filter);
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};
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class ZLibDeflateFilter : public Filter {
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public:
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ZLibDeflateFilter(bool gzip,
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int32_t level,
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int32_t window_bits,
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int32_t mem_level,
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int32_t strategy,
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uint8_t* dictionary,
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intptr_t dictionary_length,
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bool raw)
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: gzip_(gzip),
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level_(level),
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window_bits_(window_bits),
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mem_level_(mem_level),
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strategy_(strategy),
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dictionary_(dictionary),
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dictionary_length_(dictionary_length),
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raw_(raw),
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current_buffer_(NULL) {}
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virtual ~ZLibDeflateFilter();
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virtual bool Init();
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virtual bool Process(uint8_t* data, intptr_t length);
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virtual intptr_t Processed(uint8_t* buffer,
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intptr_t length,
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bool finish,
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bool end);
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private:
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const bool gzip_;
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const int32_t level_;
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const int32_t window_bits_;
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const int32_t mem_level_;
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const int32_t strategy_;
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uint8_t* dictionary_;
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const intptr_t dictionary_length_;
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const bool raw_;
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uint8_t* current_buffer_;
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z_stream stream_;
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DISALLOW_COPY_AND_ASSIGN(ZLibDeflateFilter);
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};
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class ZLibInflateFilter : public Filter {
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public:
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ZLibInflateFilter(int32_t window_bits,
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uint8_t* dictionary,
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intptr_t dictionary_length,
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bool raw)
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: window_bits_(window_bits),
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dictionary_(dictionary),
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dictionary_length_(dictionary_length),
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raw_(raw),
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current_buffer_(NULL) {}
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virtual ~ZLibInflateFilter();
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virtual bool Init();
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virtual bool Process(uint8_t* data, intptr_t length);
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virtual intptr_t Processed(uint8_t* buffer,
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intptr_t length,
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bool finish,
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bool end);
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private:
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const int32_t window_bits_;
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uint8_t* dictionary_;
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const intptr_t dictionary_length_;
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const bool raw_;
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uint8_t* current_buffer_;
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z_stream stream_;
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DISALLOW_COPY_AND_ASSIGN(ZLibInflateFilter);
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};
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} // namespace bin
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} // namespace dart
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#endif // RUNTIME_BIN_FILTER_H_
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