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|
/*****************************************************************
|
| Neptune - Zip Support
|
| Copyright (c) 2002-2008, Axiomatic Systems, LLC.
| All rights reserved.
|
| Redistribution and use in source and binary forms, with or without
| modification, are permitted provided that the following conditions are met:
| * Redistributions of source code must retain the above copyright
| notice, this list of conditions and the following disclaimer.
| * Redistributions in binary form must reproduce the above copyright
| notice, this list of conditions and the following disclaimer in the
| documentation and/or other materials provided with the distribution.
| * Neither the name of Axiomatic Systems nor the
| names of its contributors may be used to endorse or promote products
| derived from this software without specific prior written permission.
|
| THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
| EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
| DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
****************************************************************/
#ifndef _NPT_ZIP_H_
#define _NPT_ZIP_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "NptConfig.h"
#include "NptStreams.h"
#include "NptArray.h"
#include "NptFile.h"
/*----------------------------------------------------------------------
| class references
+---------------------------------------------------------------------*/
class NPT_ZipInflateState;
class NPT_ZipDeflateState;
/*----------------------------------------------------------------------
| NPT_ZipFile
+---------------------------------------------------------------------*/
const unsigned int NPT_ZIP_FILE_FLAG_ENCRYPTED = 0x01;
const unsigned int NPT_ZIP_FILE_COMPRESSION_METHOD_NONE = 0x00;
const unsigned int NPT_ZIP_FILE_COMPRESSION_METHOD_DEFLATE = 0x08;
class NPT_ZipFile
{
public:
// types
class Entry {
public:
Entry(const unsigned char* data, NPT_Size data_available);
NPT_String m_Name;
NPT_UInt16 m_Flags;
NPT_UInt16 m_CompressionMethod;
NPT_UInt32 m_Crc32;
NPT_LargeSize m_CompressedSize;
NPT_LargeSize m_UncompressedSize;
NPT_UInt16 m_DiskNumber;
NPT_UInt16 m_InternalFileAttributes;
NPT_UInt32 m_ExternalFileAttributes;
NPT_Position m_RelativeOffset;
NPT_UInt32 m_DirectoryEntrySize;
};
// class methods
static NPT_Result Parse(NPT_InputStream& stream, NPT_ZipFile*& file);
static NPT_Result GetInputStream(Entry& entry, NPT_InputStreamReference& zip_stream, NPT_InputStream*& file_stream);
// accessors
NPT_Array<Entry>& GetEntries() { return m_Entries; }
private:
// constructor
NPT_ZipFile();
// members
NPT_Array<Entry> m_Entries;
};
/*----------------------------------------------------------------------
| NPT_Zip
+---------------------------------------------------------------------*/
const int NPT_ZIP_COMPRESSION_LEVEL_DEFAULT = -1;
const int NPT_ZIP_COMPRESSION_LEVEL_MIN = 0;
const int NPT_ZIP_COMPRESSION_LEVEL_MAX = 9;
const int NPT_ZIP_COMPRESSION_LEVEL_NONE = 0;
class NPT_Zip
{
public:
// class methods
static NPT_Result MapError(int err);
/**
* Compressed data format
*/
typedef enum {
ZLIB,
GZIP
} Format;
/**
* Deflate (i.e compress) a buffer
*/
static NPT_Result Deflate(const NPT_DataBuffer& in,
NPT_DataBuffer& out,
int compression_level = NPT_ZIP_COMPRESSION_LEVEL_DEFAULT,
Format format = ZLIB);
/**
* Inflate (i.e decompress) a buffer
*/
static NPT_Result Inflate(const NPT_DataBuffer& in,
NPT_DataBuffer& out,
bool raw = false);
/**
* Deflate (i.e compress) a file
*/
static NPT_Result Deflate(NPT_File& in,
NPT_File& out,
int compression_level = NPT_ZIP_COMPRESSION_LEVEL_DEFAULT,
Format format = GZIP);
};
/*----------------------------------------------------------------------
| NPT_ZipInflatingInputStream
+---------------------------------------------------------------------*/
class NPT_ZipInflatingInputStream : public NPT_InputStream
{
public:
NPT_ZipInflatingInputStream(NPT_InputStreamReference& source, bool raw = false);
~NPT_ZipInflatingInputStream() override;
// NPT_InputStream methods
NPT_Result Read(void* buffer,
NPT_Size bytes_to_read,
NPT_Size* bytes_read = NULL) override;
NPT_Result Seek(NPT_Position offset) override;
NPT_Result Tell(NPT_Position& offset) override;
NPT_Result GetSize(NPT_LargeSize& size) override;
NPT_Result GetAvailable(NPT_LargeSize& available) override;
private:
NPT_InputStreamReference m_Source;
NPT_Position m_Position;
NPT_ZipInflateState* m_State;
NPT_DataBuffer m_Buffer;
};
/*----------------------------------------------------------------------
| NPT_ZipInflatingOutputStream
+---------------------------------------------------------------------*/
/*----------------------------------------------------------------------
| NPT_ZipDeflatingInputStream
+---------------------------------------------------------------------*/
class NPT_ZipDeflatingInputStream : public NPT_InputStream
{
public:
NPT_ZipDeflatingInputStream(NPT_InputStreamReference& source,
int compression_level = NPT_ZIP_COMPRESSION_LEVEL_DEFAULT,
NPT_Zip::Format format = NPT_Zip::ZLIB);
~NPT_ZipDeflatingInputStream() override;
// NPT_InputStream methods
NPT_Result Read(void* buffer,
NPT_Size bytes_to_read,
NPT_Size* bytes_read = NULL) override;
NPT_Result Seek(NPT_Position offset) override;
NPT_Result Tell(NPT_Position& offset) override;
NPT_Result GetSize(NPT_LargeSize& size) override;
NPT_Result GetAvailable(NPT_LargeSize& available) override;
private:
NPT_InputStreamReference m_Source;
NPT_Position m_Position;
bool m_Eos;
NPT_ZipDeflateState* m_State;
NPT_DataBuffer m_Buffer;
};
/*----------------------------------------------------------------------
| NPT_ZipDeflatingOutputStream
+---------------------------------------------------------------------*/
/*class NPT_ZipDeflatingOutputStream : public NPT_OutputStream
{
public:
NPT_ZipDeflatingOutputStream(NPT_OutputStreamReference& source,
int compression_level = NPT_ZIP_COMPRESSION_LEVEL_DEFAULT,
NPT_Zip::Format format = NPT_Zip::ZLIB);
NPT_ZipDeflatingOutputStream();
// NPT_OutputStream methods
virtual NPT_Result Write(void* buffer,
NPT_Size bytes_to_write,
NPT_Size* bytes_written = NULL);
virtual NPT_Result Seek(NPT_Position offset);
virtual NPT_Result Tell(NPT_Position& offset);
private:
NPT_OutputStreamReference m_Output;
NPT_Position m_Position;
bool m_Eos;
NPT_ZipDeflateState* m_State;
NPT_DataBuffer m_Buffer;
}; */
#endif // _NPT_ZIP_H_
|
