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initial commitment
[SVN r29217]
This commit is contained in:
Jonathan Turkanis
162
include/boost/iostreams/invert.hpp
Executable file
162
include/boost/iostreams/invert.hpp
Executable file
@@ -0,0 +1,162 @@
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// (C) Copyright Jonathan Turkanis 2003.
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// 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.)
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// See http://www.boost.org/libs/iostreams for documentation.
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#ifndef BOOST_IOSTREAMS_INVERT_HPP_INCLUDED
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#define BOOST_IOSTREAMS_INVERT_HPP_INCLUDED
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <algorithm> // copy, min.
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#include <cassert>
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#include <boost/config.hpp> // BOOST_DEDUCED_TYPENAME.
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#include <boost/detail/workaround.hpp> // default_filter_buffer_size.
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#include <boost/iostreams/char_traits.hpp>
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#include <boost/iostreams/compose.hpp>
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#include <boost/iostreams/constants.hpp>
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#include <boost/iostreams/device/array.hpp>
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#include <boost/iostreams/detail/buffer.hpp>
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#include <boost/iostreams/detail/counted_array.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/ref.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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// Must come last.
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#include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC.
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namespace boost { namespace iostreams {
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//
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// Template name: inverse.
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// Template paramters:
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// Filter - A filter adapter which
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// Description: Returns an instance of an appropriate specialization of inverse.
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//
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template<typename Filter>
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class inverse {
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private:
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typedef typename category_of<Filter>::type base_category;
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typedef reference_wrapper<Filter> filter_ref;
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public:
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typedef typename char_type_of<Filter>::type char_type;
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typedef typename int_type_of<Filter>::type int_type;
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typedef char_traits<char_type> traits_type;
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||||
typedef typename
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mpl::if_<
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is_convertible<
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||||
base_category,
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||||
input
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||||
>,
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output,
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input
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||||
>::type mode;
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struct category
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||||
: mode,
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filter_tag,
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multichar_tag,
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closable_tag
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{ };
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explicit inverse( const Filter& filter,
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std::streamsize buffer_size =
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default_filter_buffer_size)
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: pimpl_(new impl(filter, buffer_size))
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||||
{ }
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||||
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template<typename Source>
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std::streamsize read(Source& src, char* s, std::streamsize n)
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||||
{
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typedef detail::counted_array_sink<char_type> array_sink;
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typedef composite<filter_ref, array_sink> filtered_array_sink;
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assert((flags() & f_write) == 0);
|
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if (flags() == 0) {
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flags() = f_read;
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buf().set(0, 0);
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}
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filtered_array_sink snk(filter(), array_sink(s, n));
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int_type status;
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for ( status = traits_type::good();
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snk.second().count() < n && status == traits_type::good(); )
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{
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status = buf().fill(src);
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buf().flush(snk);
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}
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return snk.second().count() == 0 &&
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status == traits_type::eof()
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||||
?
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-1
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||||
:
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snk.second().count();
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}
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template<typename Sink>
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std::streamsize write(Sink& dest, const char* s, std::streamsize n)
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||||
{
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typedef detail::counted_array_source<char_type> array_source;
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typedef composite<filter_ref, array_source> filtered_array_source;
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|
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assert((flags() & f_read) == 0);
|
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if (flags() == 0) {
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flags() = f_write;
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buf().set(0, 0);
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}
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||||
|
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filtered_array_source src(filter(), array_source(s, n));
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for (bool good = true; src.second().count() < n && good; ) {
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buf().fill(src);
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good = buf().flush(dest);
|
||||
}
|
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return src.second().count();
|
||||
}
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|
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template<typename Device>
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void close( Device& dev,
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BOOST_IOS::openmode which =
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BOOST_IOS::in | BOOST_IOS::out )
|
||||
{
|
||||
if ((which & BOOST_IOS::out) != 0 && (flags() & f_write) != 0)
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||||
buf().flush(dev);
|
||||
flags() = 0;
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||||
}
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private:
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filter_ref filter() { return boost::ref(pimpl_->filter_); }
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detail::buffer<char_type>& buf() { return pimpl_->buf_; }
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int& flags() { return pimpl_->flags_; }
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||||
|
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enum flags_ {
|
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f_read = 1, f_write = 2
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||||
};
|
||||
|
||||
struct impl {
|
||||
impl(const Filter& filter, std::streamsize n)
|
||||
: filter_(filter), buf_(n), flags_(0)
|
||||
{ buf_.set(0, 0); }
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||||
Filter filter_;
|
||||
detail::buffer<char_type> buf_;
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||||
int flags_;
|
||||
};
|
||||
shared_ptr<impl> pimpl_;
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||||
};
|
||||
|
||||
//
|
||||
// Template name: invert.
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||||
// Template paramters:
|
||||
// Filter - A model of InputFilter or OutputFilter.
|
||||
// Description: Returns an instance of an appropriate specialization of inverse.
|
||||
//
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||||
template<typename Filter>
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inverse<Filter> invert(const Filter& f) { return inverse<Filter>(f); }
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|
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//----------------------------------------------------------------------------//
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|
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} } // End namespaces iostreams, boost.
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#include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC.
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#endif // #ifndef BOOST_IOSTREAMS_INVERT_HPP_INCLUDED
|
||||
418
include/boost/iostreams/restrict.hpp
Executable file
418
include/boost/iostreams/restrict.hpp
Executable file
@@ -0,0 +1,418 @@
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||||
// (C) Copyright Jonathan Turkanis 2005.
|
||||
// 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.
|
||||
|
||||
#ifndef BOOST_IOSTREAMS_RESTRICT_HPP_INCLUDED
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||||
#define BOOST_IOSTREAMS_RESTRICT_HPP_INCLUDED
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||||
|
||||
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
|
||||
# pragma once
|
||||
#endif
|
||||
|
||||
#include <algorithm> // min.
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||||
#include <utility> // pair.
|
||||
#include <boost/cstdint.hpp> // intmax_t.
|
||||
#include <boost/config.hpp> // DEDUCED_TYPENAME.
|
||||
#include <boost/iostreams/categories.hpp>
|
||||
#include <boost/iostreams/char_traits.hpp>
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||||
#include <boost/iostreams/detail/adapter/basic_adapter.hpp>
|
||||
#include <boost/iostreams/detail/call_traits.hpp>
|
||||
#include <boost/iostreams/detail/enable_if_stream.hpp>
|
||||
#include <boost/iostreams/detail/error.hpp>
|
||||
#include <boost/iostreams/detail/ios.hpp> // failure.
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||||
#include <boost/iostreams/detail/select.hpp>
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||||
#include <boost/iostreams/operations.hpp>
|
||||
#include <boost/iostreams/skip.hpp>
|
||||
#include <boost/iostreams/traits.hpp> // mode_of, is_direct.
|
||||
#include <boost/mpl/bool.hpp>
|
||||
#include <boost/static_assert.hpp>
|
||||
#include <boost/type_traits/is_convertible.hpp>
|
||||
|
||||
#include <boost/iostreams/detail/config/disable_warnings.hpp> // VC7.1 C4244.
|
||||
|
||||
namespace boost { namespace iostreams {
|
||||
|
||||
namespace detail {
|
||||
|
||||
//
|
||||
// Template name: restricted_indirect_device.
|
||||
// Description: Provides an restricted view of an indirect Device.
|
||||
// Template paramters:
|
||||
// Device - An indirect model of Device that models either Source or
|
||||
// SeekableDevice.
|
||||
//
|
||||
template<typename Device>
|
||||
class restricted_indirect_device : public basic_adapter<Device> {
|
||||
private:
|
||||
typedef typename detail::param_type<Device>::type param_type;
|
||||
public:
|
||||
typedef typename char_type_of<Device>::type char_type;
|
||||
struct category
|
||||
: mode_of<Device>::type,
|
||||
device_tag,
|
||||
closable_tag,
|
||||
flushable_tag,
|
||||
localizable_tag,
|
||||
optimally_buffered_tag
|
||||
{ };
|
||||
restricted_indirect_device( param_type dev, stream_offset off,
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||||
stream_offset len = -1 );
|
||||
std::streamsize read(char_type* s, std::streamsize n);
|
||||
std::streamsize write(const char_type* s, std::streamsize n);
|
||||
stream_offset seek(stream_offset off, BOOST_IOS::seekdir way);
|
||||
private:
|
||||
stream_offset beg_, pos_, end_;
|
||||
};
|
||||
|
||||
//
|
||||
// Template name: restricted_direct_device.
|
||||
// Description: Provides an restricted view of a Direct Device.
|
||||
// Template paramters:
|
||||
// Device - A model of Direct and Device.
|
||||
//
|
||||
template<typename Device>
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||||
class restricted_direct_device : public basic_adapter<Device> {
|
||||
public:
|
||||
typedef typename char_type_of<Device>::type char_type;
|
||||
typedef std::pair<char_type*, char_type*> pair_type;
|
||||
struct category
|
||||
: mode_of<Device>::type,
|
||||
device_tag,
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||||
direct_tag,
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||||
closable_tag,
|
||||
localizable_tag
|
||||
{ };
|
||||
restricted_direct_device( const Device& dev, stream_offset off,
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||||
stream_offset len = -1 );
|
||||
pair_type input_sequence();
|
||||
pair_type output_sequence();
|
||||
private:
|
||||
pair_type sequence(mpl::true_);
|
||||
pair_type sequence(mpl::false_);
|
||||
char_type *beg_, *end_;
|
||||
};
|
||||
|
||||
//
|
||||
// Template name: restricted_filter.
|
||||
// Description: Provides an restricted view of a Filter.
|
||||
// Template paramters:
|
||||
// Filter - An indirect model of Filter.
|
||||
//
|
||||
template<typename Filter>
|
||||
class restricted_filter : public basic_adapter<Filter> {
|
||||
public:
|
||||
typedef typename char_type_of<Filter>::type char_type;
|
||||
struct category
|
||||
: mode_of<Filter>::type,
|
||||
filter_tag,
|
||||
multichar_tag,
|
||||
closable_tag,
|
||||
localizable_tag,
|
||||
optimally_buffered_tag
|
||||
{ };
|
||||
restricted_filter( const Filter& flt, stream_offset off,
|
||||
stream_offset len = -1 );
|
||||
|
||||
template<typename Source>
|
||||
std::streamsize read(Source& src, char_type* s, std::streamsize n)
|
||||
{
|
||||
using namespace std;
|
||||
if (!open_)
|
||||
open(src);
|
||||
streamsize amt =
|
||||
end_ != -1 ?
|
||||
(std::min) (n, static_cast<streamsize>(end_ - pos_)) :
|
||||
n;
|
||||
streamsize result = iostreams::read(this->component(), src, s, amt);
|
||||
if (result != -1)
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||||
pos_ += result;
|
||||
return result;
|
||||
}
|
||||
|
||||
template<typename Sink>
|
||||
std::streamsize write(Sink& snk, const char_type* s, std::streamsize n)
|
||||
{
|
||||
if (!open_)
|
||||
open(snk);
|
||||
if (end_ != -1 && pos_ + n >= end_)
|
||||
bad_write();
|
||||
std::streamsize result =
|
||||
iostreams::write(this->component(), snk, s, n);
|
||||
pos_ += result;
|
||||
return result;
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
stream_offset seek(Device& dev, stream_offset off, BOOST_IOS::seekdir way)
|
||||
{
|
||||
stream_offset next;
|
||||
if (way == BOOST_IOS::beg) {
|
||||
next = beg_ + off;
|
||||
} else if (way == BOOST_IOS::cur) {
|
||||
next = pos_ + off;
|
||||
} else if (end_ != -1) {
|
||||
next = end_ + off;
|
||||
} else {
|
||||
// Restriction is half-open; seek relative to the actual end.
|
||||
pos_ = this->component().seek(dev, off, BOOST_IOS::end);
|
||||
if (pos_ < beg_)
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||||
bad_seek();
|
||||
return pos_ - beg_;
|
||||
}
|
||||
if (next < beg_ || end_ != -1 && next >= end_)
|
||||
bad_seek();
|
||||
pos_ = this->component().seek(dev, next, BOOST_IOS::cur);
|
||||
return pos_ - beg_;
|
||||
}
|
||||
private:
|
||||
template<typename Device>
|
||||
void open(Device& dev)
|
||||
{
|
||||
open_ = true;
|
||||
iostreams::skip(this->component(), dev, beg_);
|
||||
}
|
||||
stream_offset beg_, pos_, end_;
|
||||
bool open_;
|
||||
};
|
||||
|
||||
template<typename T>
|
||||
struct restriction_traits
|
||||
: iostreams::select< // Disambiguation for Tru64.
|
||||
is_filter<T>, restricted_filter<T>,
|
||||
is_direct<T>, restricted_direct_device<T>,
|
||||
else_, restricted_indirect_device<T>
|
||||
>
|
||||
{ };
|
||||
|
||||
} // End namespace detail.
|
||||
|
||||
template<typename T>
|
||||
struct restriction : public detail::restriction_traits<T>::type {
|
||||
typedef typename detail::param_type<T>::type param_type;
|
||||
typedef typename detail::restriction_traits<T>::type base_type;
|
||||
restriction(param_type t, stream_offset off, stream_offset len = -1)
|
||||
: base_type(t, off, len)
|
||||
{ }
|
||||
};
|
||||
|
||||
//--------------Implementation of restrict------------------------------------//
|
||||
|
||||
// Note: The following workarounds are patterned after resolve.hpp. It has not
|
||||
// yet been confirmed that they are necessary.
|
||||
|
||||
#ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //-------------------------//
|
||||
# ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-------------------------------//
|
||||
|
||||
template<typename T>
|
||||
restriction<T> restrict( const T& t, stream_offset off, stream_offset len = -1
|
||||
BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) )
|
||||
{ return restriction<T>(t, off, len); }
|
||||
|
||||
template<typename Ch, typename Tr>
|
||||
restriction< std::basic_streambuf<Ch, Tr> >
|
||||
restrict(std::basic_streambuf<Ch, Tr>& sb, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction< std::basic_streambuf<Ch, Tr> >(sb, off, len); }
|
||||
|
||||
template<typename Ch, typename Tr>
|
||||
restriction< std::basic_istream<Ch, Tr> >
|
||||
restrict(std::basic_istream<Ch, Tr>& is, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction< std::basic_istream<Ch, Tr> >(is, off, len); }
|
||||
|
||||
template<typename Ch, typename Tr>
|
||||
restriction< std::basic_ostream<Ch, Tr> >
|
||||
restrict(std::basic_ostream<Ch, Tr>& os, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction< std::basic_ostream<Ch, Tr> >(os, off, len); }
|
||||
|
||||
template<typename Ch, typename Tr>
|
||||
restriction< std::basic_iostream<Ch, Tr> >
|
||||
restrict(std::basic_iostream<Ch, Tr>& io, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction< std::basic_iostream<Ch, Tr> >(io, off, len); }
|
||||
|
||||
# else // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //---------------------//
|
||||
|
||||
template<typename T>
|
||||
restriction<T> restrict( const T& t, stream_offset off, stream_offset len = -1
|
||||
BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) )
|
||||
{ return restriction<T>(t, off, len); }
|
||||
|
||||
restriction<std::streambuf>
|
||||
restrict(std::streambuf& sb, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction<std::streambuf>(sb, off, len); }
|
||||
|
||||
restriction<std::istream>
|
||||
restrict(std::istream<Ch, Tr>& is, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction<std::istream>(is, off, len); }
|
||||
|
||||
restriction<std::ostream>
|
||||
restrict(std::ostream<Ch, Tr>& os, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction<std::ostream>(os, off, len); }
|
||||
|
||||
restriction<std::iostream>
|
||||
restrict(std::iostream<Ch, Tr>& io, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction<std::iostream>(io, off, len); }
|
||||
|
||||
# endif // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------//
|
||||
#else // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //----------------//
|
||||
|
||||
template<typename T>
|
||||
restriction<T>
|
||||
restrict(const T& t, stream_offset off, stream_offset len, mpl::true_)
|
||||
{ // Bad overload resolution.
|
||||
return restriction<T>(const_cast<T&>(t, off, len));
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
restriction<T>
|
||||
restrict(const T& t, stream_offset off, stream_offset len, mpl::false_)
|
||||
{ return restriction<T>(t, off, len); }
|
||||
|
||||
template<typename T>
|
||||
restriction<T>
|
||||
restrict( const T& t, stream_offset off, stream_offset len = -1
|
||||
BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) )
|
||||
{ return restrict(t, off, len, is_std_io<T>()); }
|
||||
|
||||
# if !BOOST_WORKAROUND(__BORLANDC__, < 0x600) && \
|
||||
!BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && \
|
||||
!defined(__GNUC__) // ---------------------------------------------------//
|
||||
|
||||
template<typename T>
|
||||
restriction<T>
|
||||
restrict(T& t, stream_offset off, stream_offset len = -1)
|
||||
{ return restriction<T>(t, off, len); }
|
||||
|
||||
# endif // Borland 5.x, VC6-7.0 or GCC 2.9x //--------------------------------//
|
||||
#endif // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //---------------//
|
||||
//----------------------------------------------------------------------------//
|
||||
|
||||
namespace detail {
|
||||
|
||||
//--------------Implementation of restricted_indirect_device------------------//
|
||||
|
||||
template<typename Device>
|
||||
restricted_indirect_device<Device>::restricted_indirect_device
|
||||
(param_type dev, stream_offset off, stream_offset len)
|
||||
: basic_adapter<Device>(dev), beg_(off), pos_(off),
|
||||
end_(len != -1 ? off + len : -1)
|
||||
{
|
||||
if (len < -1 || off < 0)
|
||||
throw BOOST_IOSTREAMS_FAILURE("bad offset");
|
||||
iostreams::skip(this->component(), off);
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
inline std::streamsize restricted_indirect_device<Device>::read
|
||||
(char_type* s, std::streamsize n)
|
||||
{
|
||||
using namespace std;
|
||||
streamsize amt =
|
||||
end_ != -1 ?
|
||||
(std::min) (n, static_cast<streamsize>(end_ - pos_)) :
|
||||
n;
|
||||
streamsize result = iostreams::read(this->component(), s, amt);
|
||||
if (result != -1)
|
||||
pos_ += result;
|
||||
return result;
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
inline std::streamsize restricted_indirect_device<Device>::write
|
||||
(const char_type* s, std::streamsize n)
|
||||
{
|
||||
if (end_ != -1 && pos_ + n >= end_)
|
||||
bad_write();
|
||||
std::streamsize result = iostreams::write(this->component(), s, n);
|
||||
pos_ += result;
|
||||
return result;
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
stream_offset restricted_indirect_device<Device>::seek
|
||||
(stream_offset off, BOOST_IOS::seekdir way)
|
||||
{
|
||||
stream_offset next;
|
||||
if (way == BOOST_IOS::beg) {
|
||||
next = beg_ + off;
|
||||
} else if (way == BOOST_IOS::cur) {
|
||||
next = pos_ + off;
|
||||
} else if (end_ != -1) {
|
||||
next = end_ + off;
|
||||
} else {
|
||||
// Restriction is half-open; seek relative to the actual end.
|
||||
pos_ = iostreams::seek(this->component(), off, BOOST_IOS::end);
|
||||
if (pos_ < beg_)
|
||||
bad_seek();
|
||||
return pos_ - beg_;
|
||||
}
|
||||
if (next < beg_ || end_ != -1 && next >= end_)
|
||||
bad_seek();
|
||||
pos_ = iostreams::seek(this->component(), next - pos_, BOOST_IOS::cur);
|
||||
return pos_ - beg_;
|
||||
}
|
||||
|
||||
//--------------Implementation of restricted_direct_device--------------------//
|
||||
|
||||
template<typename Device>
|
||||
restricted_direct_device<Device>::restricted_direct_device
|
||||
(const Device& dev, stream_offset off, stream_offset len)
|
||||
: basic_adapter<Device>(dev), beg_(0), end_(0)
|
||||
{
|
||||
std::pair<char_type*, char_type*> seq =
|
||||
sequence(is_convertible<category, input>());
|
||||
if ( off < 0 || len < -1 ||
|
||||
len != -1 && off + len > seq.second - seq.first )
|
||||
{
|
||||
throw BOOST_IOSTREAMS_FAILURE("bad offset");
|
||||
}
|
||||
beg_ = seq.first + off;
|
||||
end_ = len != -1 ?
|
||||
seq.first + off + len :
|
||||
seq.second;
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
typename restricted_direct_device<Device>::pair_type
|
||||
restricted_direct_device<Device>::input_sequence()
|
||||
{
|
||||
BOOST_STATIC_ASSERT((is_convertible<category, input>::value));
|
||||
return std::make_pair(beg_, end_);
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
typename restricted_direct_device<Device>::pair_type
|
||||
restricted_direct_device<Device>::output_sequence()
|
||||
{
|
||||
BOOST_STATIC_ASSERT((is_convertible<category, output>::value));
|
||||
return std::make_pair(beg_, end_);
|
||||
}
|
||||
|
||||
template<typename Device>
|
||||
typename restricted_direct_device<Device>::pair_type
|
||||
restricted_direct_device<Device>::sequence(mpl::true_)
|
||||
{ return iostreams::input_sequence(this->component()); }
|
||||
|
||||
template<typename Device>
|
||||
typename restricted_direct_device<Device>::pair_type
|
||||
restricted_direct_device<Device>::sequence(mpl::false_)
|
||||
{ return iostreams::output_sequence(this->component()); }
|
||||
|
||||
//--------------Implementation of restricted_filter---------------------------//
|
||||
|
||||
template<typename Filter>
|
||||
restricted_filter<Filter>::restricted_filter
|
||||
(const Filter& flt, stream_offset off, stream_offset len)
|
||||
: basic_adapter<Filter>(flt), beg_(off),
|
||||
pos_(off), end_(len != -1 ? off + len : -1), open_(false)
|
||||
{
|
||||
if (len < -1 || off < 0)
|
||||
throw BOOST_IOSTREAMS_FAILURE("bad offset");
|
||||
}
|
||||
|
||||
} // End namespace detail.
|
||||
|
||||
} } // End namespaces iostreams, boost.
|
||||
|
||||
|
||||
#endif // #ifndef BOOST_IOSTREAMS_RESTRICT_HPP_INCLUDED
|
||||
Reference in New Issue
Block a user