zipios
2.2.0
Zipios -- a small C++ library that provides easy access to .zip files.
src
deflateoutputstreambuf.hpp
Go to the documentation of this file.
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#pragma once
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#ifndef DEFLATEOUTPUTSTREAMBUF_HPP
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#define DEFLATEOUTPUTSTREAMBUF_HPP
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/*
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Zipios -- a small C++ library that provides easy access to .zip files.
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Copyright (C) 2000-2007 Thomas Sondergaard
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Copyright (C) 2015-2019 Made to Order Software Corporation
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
filteroutputstreambuf.hpp
"
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#include "
zipios/fileentry.hpp
"
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#include <cstdint>
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#include <zlib.h>
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namespace
zipios
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{
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class
DeflateOutputStreambuf
:
public
FilterOutputStreambuf
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{
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public
:
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DeflateOutputStreambuf
(std::streambuf * outbuf);
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DeflateOutputStreambuf
(
DeflateOutputStreambuf
const
& src) =
delete
;
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DeflateOutputStreambuf
&
operator =
(
DeflateOutputStreambuf
const
& rhs) =
delete
;
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virtual
~DeflateOutputStreambuf
();
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bool
init
(
FileEntry::CompressionLevel
compression_level);
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void
closeStream
();
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uint32_t
getCrc32
()
const
;
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size_t
getSize
()
const
;
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protected
:
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virtual
int
overflow
(
int
c = EOF);
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virtual
int
sync
();
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uint32_t
m_overflown_bytes
= 0;
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std::vector<char>
m_invec
;
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private
:
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void
endDeflation
();
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void
flushOutvec
();
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z_stream
m_zs
= z_stream();
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bool
m_zs_initialized
=
false
;
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std::vector<char>
m_outvec
;
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uint32_t
m_crc32
= 0;
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};
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}
// zipios namespace
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// Local Variables:
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// mode: cpp
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// tab-width: 4
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// End:
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// vim: ts=4 sw=4 et
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#endif
zipios::DeflateOutputStreambuf
A class to handle stream deflate on the fly.
Definition
deflateoutputstreambuf.hpp:48
zipios::DeflateOutputStreambuf::~DeflateOutputStreambuf
virtual ~DeflateOutputStreambuf()
Clean up any resources used by this object.
Definition
deflateoutputstreambuf.cpp:87
zipios::DeflateOutputStreambuf::init
bool init(FileEntry::CompressionLevel compression_level)
Initialize the zlib library.
Definition
deflateoutputstreambuf.cpp:106
zipios::DeflateOutputStreambuf::getCrc32
uint32_t getCrc32() const
Get the CRC32 of the file.
Definition
deflateoutputstreambuf.cpp:239
zipios::DeflateOutputStreambuf::m_zs_initialized
bool m_zs_initialized
Definition
deflateoutputstreambuf.hpp:72
zipios::DeflateOutputStreambuf::endDeflation
void endDeflation()
End deflation of current file.
Definition
deflateoutputstreambuf.cpp:382
zipios::DeflateOutputStreambuf::DeflateOutputStreambuf
DeflateOutputStreambuf(std::streambuf *outbuf)
Initialize a DeflateOutputStreambuf object.
Definition
deflateoutputstreambuf.cpp:57
zipios::DeflateOutputStreambuf::m_overflown_bytes
uint32_t m_overflown_bytes
Definition
deflateoutputstreambuf.hpp:64
zipios::DeflateOutputStreambuf::m_outvec
std::vector< char > m_outvec
Definition
deflateoutputstreambuf.hpp:74
zipios::DeflateOutputStreambuf::flushOutvec
void flushOutvec()
Flush the cached output data.
Definition
deflateoutputstreambuf.cpp:351
zipios::DeflateOutputStreambuf::m_zs
z_stream m_zs
Definition
deflateoutputstreambuf.hpp:71
zipios::DeflateOutputStreambuf::sync
virtual int sync()
Synchronize the buffer.
Definition
deflateoutputstreambuf.cpp:340
zipios::DeflateOutputStreambuf::m_invec
std::vector< char > m_invec
Definition
deflateoutputstreambuf.hpp:65
zipios::DeflateOutputStreambuf::overflow
virtual int overflow(int c=EOF)
Handle an overflow.
Definition
deflateoutputstreambuf.cpp:275
zipios::DeflateOutputStreambuf::m_crc32
uint32_t m_crc32
Definition
deflateoutputstreambuf.hpp:76
zipios::DeflateOutputStreambuf::closeStream
void closeStream()
Closing the stream.
Definition
deflateoutputstreambuf.cpp:205
zipios::DeflateOutputStreambuf::operator=
DeflateOutputStreambuf & operator=(DeflateOutputStreambuf const &rhs)=delete
zipios::DeflateOutputStreambuf::DeflateOutputStreambuf
DeflateOutputStreambuf(DeflateOutputStreambuf const &src)=delete
zipios::DeflateOutputStreambuf::getSize
size_t getSize() const
Retrieve the size of the file deflated.
Definition
deflateoutputstreambuf.cpp:256
zipios::FileEntry::CompressionLevel
int CompressionLevel
The compression level to be used to save an entry.
Definition
fileentry.hpp:85
zipios::FilterOutputStreambuf
A base class to develop output stream filters.
Definition
filteroutputstreambuf.hpp:41
fileentry.hpp
Define the zipios::FileEntry class.
filteroutputstreambuf.hpp
Declarations of the zipios::FilterOutputStreambuf.
zipios
The zipios namespace includes the Zipios library definitions.
Definition
backbuffer.cpp:36
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