FM / filter

/usr/include/boost/iostreams/filter

Name	Size	Mode	Actions
aggregate.hpp	5288	0644	edit dl rm
bzip2.hpp	14004	0644	edit dl rm
counter.hpp	2424	0644	edit dl rm
grep.hpp	3573	0644	edit dl rm
gzip.hpp	24804	0644	edit dl rm
line.hpp	7089	0644	edit dl rm
lzma.hpp	12550	0644	edit dl rm
newline.hpp	12174	0644	edit dl rm
regex.hpp	4112	0644	edit dl rm
stdio.hpp	3232	0644	edit dl rm
symmetric.hpp	10836	0644	edit dl rm
test.hpp	10595	0644	edit dl rm
zlib.hpp	14943	0644	edit dl rm
zstd.hpp	11967	0644	edit dl rm

Edit: /usr/include/boost/iostreams/filter/bzip2.hpp (14004B)

// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2003-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)

// See http://www.boost.org/libs/iostreams for documentation.

// Note: custom allocators are not supported on VC6, since that compiler
// had trouble finding the function zlib_base::do_init.

#ifndef BOOST_IOSTREAMS_BZIP2_HPP_INCLUDED
#define BOOST_IOSTREAMS_BZIP2_HPP_INCLUDED

#if defined(_MSC_VER)
# pragma once
#endif
                   
#include <cassert>                            
#include <memory>            // allocator.
#include <new>               // bad_alloc.
#include <boost/config.hpp>  // MSVC, STATIC_CONSTANT, DEDUCED_TYPENAME, DINKUM.
#include <boost/detail/workaround.hpp>
#include <boost/iostreams/constants.hpp>   // buffer size.
#include <boost/iostreams/detail/config/auto_link.hpp>
#include <boost/iostreams/detail/config/bzip2.hpp>
#include <boost/iostreams/detail/config/dyn_link.hpp>
#include <boost/iostreams/detail/config/wide_streams.hpp>
#include <boost/iostreams/detail/ios.hpp>  // failure, streamsize.
#include <boost/iostreams/filter/symmetric.hpp>               
#include <boost/iostreams/pipeline.hpp>       
#include <boost/type_traits/is_same.hpp>

// Must come last.
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable:4251 4231 4660)
#endif
#include <boost/config/abi_prefix.hpp>

// Temporary fix.
#undef small

namespace boost { namespace iostreams {

namespace bzip2 {

// Typedefs.

typedef void* (*alloc_func)(void*, int, int);
typedef void (*free_func)(void*, void*);

// Status codes

BOOST_IOSTREAMS_DECL extern const int ok;
BOOST_IOSTREAMS_DECL extern const int run_ok;
BOOST_IOSTREAMS_DECL extern const int flush_ok;
BOOST_IOSTREAMS_DECL extern const int finish_ok;
BOOST_IOSTREAMS_DECL extern const int stream_end;    
BOOST_IOSTREAMS_DECL extern const int sequence_error;
BOOST_IOSTREAMS_DECL extern const int param_error;
BOOST_IOSTREAMS_DECL extern const int mem_error;
BOOST_IOSTREAMS_DECL extern const int data_error;
BOOST_IOSTREAMS_DECL extern const int data_error_magic;
BOOST_IOSTREAMS_DECL extern const int io_error;
BOOST_IOSTREAMS_DECL extern const int unexpected_eof;
BOOST_IOSTREAMS_DECL extern const int outbuff_full;
BOOST_IOSTREAMS_DECL extern const int config_error;

// Action codes

BOOST_IOSTREAMS_DECL extern const int finish;
BOOST_IOSTREAMS_DECL extern const int run;

// Default values

const int default_block_size   = 9;
const int default_work_factor  = 30;
const bool default_small       = false;

} // End namespace bzip2.

//
// Class name: bzip2_params.
// Description: Encapsulates the parameters passed to deflateInit2
//      to customize compression.
//
struct bzip2_params {

// Non-explicit constructor for compression.
    bzip2_params( int block_size_  = bzip2::default_block_size,
                  int work_factor_ = bzip2::default_work_factor )
        : block_size(block_size_), work_factor(work_factor_)
        { }

// Constructor for decompression.
    bzip2_params(bool small)
        : small(small), work_factor(0)
        { }

union {
        int   block_size;    // For compression.
        bool  small;         // For decompression.
    };
    int       work_factor;
};

//
// Class name: bzip2_error.
// Description: Subclass of std::ios_base::failure thrown to indicate
//     bzip2 errors other than out-of-memory conditions.
//
class BOOST_IOSTREAMS_DECL bzip2_error : public BOOST_IOSTREAMS_FAILURE {
public:
    explicit bzip2_error(int error);
    int error() const { return error_; }
    static void check BOOST_PREVENT_MACRO_SUBSTITUTION(int error);
private:
    int error_;
};

namespace detail {

template<typename Alloc>
struct bzip2_allocator_traits {
#ifndef BOOST_NO_STD_ALLOCATOR
#if defined(BOOST_NO_CXX11_ALLOCATOR)
    typedef typename Alloc::template rebind<char>::other type;
#else
    typedef typename std::allocator_traits<Alloc>::template rebind_alloc<char> type;
#endif
#else
    typedef std::allocator<char> type;
#endif
};

template< typename Alloc,
          typename Base = // VC6 workaround (C2516)
              BOOST_DEDUCED_TYPENAME bzip2_allocator_traits<Alloc>::type >
struct bzip2_allocator : private Base {
private:
#if defined(BOOST_NO_CXX11_ALLOCATOR) || defined(BOOST_NO_STD_ALLOCATOR)
    typedef typename Base::size_type size_type;
#else
    typedef typename std::allocator_traits<Base>::size_type size_type;
#endif
public:
    BOOST_STATIC_CONSTANT(bool, custom = 
        (!is_same<std::allocator<char>, Base>::value));
    typedef typename bzip2_allocator_traits<Alloc>::type allocator_type;
    static void* allocate(void* self, int items, int size);
    static void deallocate(void* self, void* address);
};

class BOOST_IOSTREAMS_DECL bzip2_base  { 
public:
    typedef char char_type;
protected:
    bzip2_base(const bzip2_params& params);
    ~bzip2_base();
    bzip2_params& params() { return params_; }
    bool& ready() { return ready_; }
    template<typename Alloc> 
    void init( bool compress,
               bzip2_allocator<Alloc>& alloc )
        {
            bool custom = bzip2_allocator<Alloc>::custom;
            do_init( compress,
                     custom ? bzip2_allocator<Alloc>::allocate : 0,
                     custom ? bzip2_allocator<Alloc>::deallocate : 0,
                     custom ? &alloc : 0 );
        }
    void before( const char*& src_begin, const char* src_end,
                 char*& dest_begin, char* dest_end );
    void after(const char*& src_begin, char*& dest_begin);
    int check_end(const char* src_begin, const char* dest_begin);
    int compress(int action);
    int decompress();
    int end(bool compress, std::nothrow_t);
    void end(bool compress);
private:
    void do_init( bool compress, 
                  bzip2::alloc_func,
                  bzip2::free_func, 
                  void* derived );
    bzip2_params  params_;
    void*         stream_; // Actual type: bz_stream*.
    bool          ready_;
};

//
// Template name: bzip2_compressor_impl
// Description: Model of SymmetricFilter implementing compression by
//      delegating to the libbzip2 function BZ_bzCompress.
//
template<typename Alloc = std::allocator<char> >
class bzip2_compressor_impl 
    : public bzip2_base, 
      #if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
          public
      #endif
      bzip2_allocator<Alloc> 
{
public: 
    bzip2_compressor_impl(const bzip2_params&);
    ~bzip2_compressor_impl();
    bool filter( const char*& src_begin, const char* src_end,
                 char*& dest_begin, char* dest_end, bool flush );
    void close();
private:
    void init();
    bool eof_; // Guard to make sure filter() isn't called after it returns false.
};

//
// Template name: bzip2_compressor
// Description: Model of SymmetricFilter implementing decompression by
//      delegating to the libbzip2 function BZ_bzDecompress.
//
template<typename Alloc = std::allocator<char> >
class bzip2_decompressor_impl 
    : public bzip2_base, 
      #if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
          public
      #endif
      bzip2_allocator<Alloc> 
{ 
public:
    bzip2_decompressor_impl(bool small = bzip2::default_small);
    ~bzip2_decompressor_impl();
    bool filter( const char*& begin_in, const char* end_in,
                 char*& begin_out, char* end_out, bool flush );
    void close();
private:
    void init();
    bool eof_; // Guard to make sure filter() isn't called after it returns false.
};

} // End namespace detail.

//
// Template name: bzip2_compressor
// Description: Model of InputFilter and OutputFilter implementing
//      compression using libbzip2.
//
template<typename Alloc = std::allocator<char> >
struct basic_bzip2_compressor 
    : symmetric_filter<detail::bzip2_compressor_impl<Alloc>, Alloc> 
{
private:
    typedef detail::bzip2_compressor_impl<Alloc>        impl_type;
    typedef symmetric_filter<impl_type, Alloc>  base_type;
public:
    typedef typename base_type::char_type               char_type;
    typedef typename base_type::category                category;
    basic_bzip2_compressor( const bzip2_params& = bzip2::default_block_size, 
                            std::streamsize buffer_size =  default_device_buffer_size );
};
BOOST_IOSTREAMS_PIPABLE(basic_bzip2_compressor, 1)

typedef basic_bzip2_compressor<> bzip2_compressor;

//
// Template name: bzip2_decompressor
// Description: Model of InputFilter and OutputFilter implementing
//      decompression using libbzip2.
//
template<typename Alloc = std::allocator<char> >
struct basic_bzip2_decompressor 
    : symmetric_filter<detail::bzip2_decompressor_impl<Alloc>, Alloc> 
{
private:
    typedef detail::bzip2_decompressor_impl<Alloc>      impl_type;
    typedef symmetric_filter<impl_type, Alloc>  base_type;
public:
    typedef typename base_type::char_type               char_type;
    typedef typename base_type::category                category;
    basic_bzip2_decompressor( bool small = bzip2::default_small,
                              std::streamsize buffer_size = default_device_buffer_size );
};
BOOST_IOSTREAMS_PIPABLE(basic_bzip2_decompressor, 1)

typedef basic_bzip2_decompressor<> bzip2_decompressor;

//----------------------------------------------------------------------------//

//------------------Implementation of bzip2_allocator-------------------------//

namespace detail {

template<typename Alloc, typename Base>
void* bzip2_allocator<Alloc, Base>::allocate(void* self, int items, int size)
{ 
    size_type len = items * size;
    char* ptr = 
        static_cast<allocator_type*>(self)->allocate
            (len + sizeof(size_type)
            #if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1)
                , (char*)0
            #endif
            );
    *reinterpret_cast<size_type*>(ptr) = len;
    return ptr + sizeof(size_type);
}

template<typename Alloc, typename Base>
void bzip2_allocator<Alloc, Base>::deallocate(void* self, void* address)
{ 
    char* ptr = reinterpret_cast<char*>(address) - sizeof(size_type);
    size_type len = *reinterpret_cast<size_type*>(ptr) + sizeof(size_type);
    static_cast<allocator_type*>(self)->deallocate(ptr, len); 
}

//------------------Implementation of bzip2_compressor_impl-------------------//

template<typename Alloc>
bzip2_compressor_impl<Alloc>::bzip2_compressor_impl(const bzip2_params& p)
    : bzip2_base(p), eof_(false) { }

template<typename Alloc>
bzip2_compressor_impl<Alloc>::~bzip2_compressor_impl()
{ (void) bzip2_base::end(true, std::nothrow); }

template<typename Alloc>
bool bzip2_compressor_impl<Alloc>::filter
    ( const char*& src_begin, const char* src_end,
      char*& dest_begin, char* dest_end, bool flush )
{
    if (!ready()) init();
    if (eof_) return false;
    before(src_begin, src_end, dest_begin, dest_end);
    int result = compress(flush ? bzip2::finish : bzip2::run);
    after(src_begin, dest_begin);
    bzip2_error::check BOOST_PREVENT_MACRO_SUBSTITUTION(result);
    return !(eof_ = result == bzip2::stream_end);
}

template<typename Alloc>
void bzip2_compressor_impl<Alloc>::close() 
{ 
    try {
        end(true);
    } catch (...) { 
        eof_ = false; 
        throw;
    }
    eof_ = false;
}

template<typename Alloc>
inline void bzip2_compressor_impl<Alloc>::init() 
{ bzip2_base::init(true, static_cast<bzip2_allocator<Alloc>&>(*this)); }

//------------------Implementation of bzip2_decompressor_impl-----------------//

template<typename Alloc>
bzip2_decompressor_impl<Alloc>::bzip2_decompressor_impl(bool small)
    : bzip2_base(bzip2_params(small)), eof_(false) { }

template<typename Alloc>
bzip2_decompressor_impl<Alloc>::~bzip2_decompressor_impl()
{ (void) bzip2_base::end(false, std::nothrow); }

template<typename Alloc>
bool bzip2_decompressor_impl<Alloc>::filter
    ( const char*& src_begin, const char* src_end,
      char*& dest_begin, char* dest_end, bool flush )
{
    do {
        if (eof_) {
            // reset the stream if there are more characters
            if(src_begin == src_end)
                return false;
            else
                close();
        }
        if (!ready()) 
            init();
        before(src_begin, src_end, dest_begin, dest_end);
        int result = decompress();
        if(result == bzip2::ok && flush)
            result = check_end(src_begin, dest_begin);
        after(src_begin, dest_begin);
        bzip2_error::check BOOST_PREVENT_MACRO_SUBSTITUTION(result);
        eof_ = result == bzip2::stream_end;
    } while (eof_ && src_begin != src_end && dest_begin != dest_end);
    return true; 
}

template<typename Alloc>
void bzip2_decompressor_impl<Alloc>::close() 
{ 
    try {
        end(false);
    } catch (...) { 
        eof_ = false; 
        throw;
    }
    eof_ = false;
}

template<typename Alloc>
inline void bzip2_decompressor_impl<Alloc>::init()
{ bzip2_base::init(false, static_cast<bzip2_allocator<Alloc>&>(*this)); }
} // End namespace detail.

//------------------Implementation of bzip2_decompressor----------------------//

template<typename Alloc>
basic_bzip2_compressor<Alloc>::basic_bzip2_compressor
        (const bzip2_params& p, std::streamsize buffer_size) 
    : base_type(buffer_size, p) 
    { }

//------------------Implementation of bzip2_decompressor----------------------//

template<typename Alloc>
basic_bzip2_decompressor<Alloc>::basic_bzip2_decompressor
        (bool small, std::streamsize buffer_size) 
    : base_type(buffer_size, small)
    { }

//----------------------------------------------------------------------------//

} } // End namespaces iostreams, boost.

#include <boost/config/abi_suffix.hpp> // Pops abi_suffix.hpp pragmas.
#ifdef BOOST_MSVC
# pragma warning(pop)
#endif

#endif // #ifndef BOOST_IOSTREAMS_BZIP2_HPP_INCLUDED

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