ajohnsen@google.com
28daa7ba59
BUG= Review URL: https://codereview.chromium.org//12451004 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@19551 260f80e4-7a28-3924-810f-c04153c831b5
76 lines
1.9 KiB
C++
76 lines
1.9 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 BIN_FILTER_H_
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#define BIN_FILTER_H_
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#include "bin/builtin.h"
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#include "bin/utils.h"
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#include "../third_party/zlib/zlib.h"
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class Filter {
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protected:
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Filter() : initialized(false) {}
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public:
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virtual ~Filter() {}
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public:
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virtual bool Init() = 0;
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/**
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* On a succesfull 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, intptr_t length, bool finish) = 0;
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public:
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static Dart_Handle SetFilterPointerNativeField(Dart_Handle filter,
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Filter* filter_pointer);
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static Dart_Handle GetFilterPointerNativeField(Dart_Handle filter,
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Filter** filter_pointer);
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protected:
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bool initialized;
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};
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class ZLibDeflateFilter : public Filter {
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public:
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ZLibDeflateFilter(bool gZip = false, int level = 6)
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: gZip(gZip), level(level), current_buffer(NULL) {}
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virtual ~ZLibDeflateFilter();
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public:
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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, intptr_t length, bool finish);
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private:
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const bool gZip;
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const int level;
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uint8_t* current_buffer;
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z_stream stream;
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};
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class ZLibInflateFilter : public Filter {
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public:
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ZLibInflateFilter() : current_buffer(NULL) {}
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virtual ~ZLibInflateFilter();
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public:
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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, intptr_t length, bool finish);
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private:
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uint8_t* current_buffer;
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z_stream stream;
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};
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#endif // BIN_FILTER_H_
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