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authorRemko Tronçon <git@el-tramo.be>2010-02-11 12:14:00 (GMT)
committerRemko Tronçon <git@el-tramo.be>2010-02-11 12:14:00 (GMT)
commit0efa7c32aaf21a29b42b5926cc116007056843be (patch)
tree882f663a5dd0e65694bf6077b71086dd77fd7ff8 /3rdParty/Boost/boost/asio/basic_streambuf.hpp
parent1d20eabbc32274b491b4c2bedf73d19933d97bfd (diff)
downloadswift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.zip
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Moved some modules into separate git modules.
Diffstat (limited to '3rdParty/Boost/boost/asio/basic_streambuf.hpp')
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diff --git a/3rdParty/Boost b/3rdParty/Boost
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+Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79
diff --git a/3rdParty/Boost/boost/asio/basic_streambuf.hpp b/3rdParty/Boost/boost/asio/basic_streambuf.hpp
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@@ -1,340 +0,0 @@
-//
-// basic_streambuf.hpp
-// ~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// 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)
-//
-
-#ifndef BOOST_ASIO_BASIC_STREAMBUF_HPP
-#define BOOST_ASIO_BASIC_STREAMBUF_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include <boost/asio/detail/push_options.hpp>
-
-#include <boost/asio/detail/push_options.hpp>
-#include <algorithm>
-#include <cstring>
-#include <limits>
-#include <memory>
-#include <stdexcept>
-#include <streambuf>
-#include <vector>
-#include <boost/asio/detail/pop_options.hpp>
-
-#include <boost/asio/buffer.hpp>
-#include <boost/asio/detail/noncopyable.hpp>
-
-namespace boost {
-namespace asio {
-
-/// Automatically resizable buffer class based on std::streambuf.
-/**
- * The @c basic_streambuf class is derived from @c std::streambuf to associate
- * the streambuf's input and output sequences with one or more character
- * arrays. These character arrays are internal to the @c basic_streambuf
- * object, but direct access to the array elements is provided to permit them
- * to be used efficiently with I/O operations. Characters written to the output
- * sequence of a @c basic_streambuf object are appended to the input sequence
- * of the same object.
- *
- * The @c basic_streambuf class's public interface is intended to permit the
- * following implementation strategies:
- *
- * @li A single contiguous character array, which is reallocated as necessary
- * to accommodate changes in the size of the character sequence. This is the
- * implementation approach currently used in Asio.
- *
- * @li A sequence of one or more character arrays, where each array is of the
- * same size. Additional character array objects are appended to the sequence
- * to accommodate changes in the size of the character sequence.
- *
- * @li A sequence of one or more character arrays of varying sizes. Additional
- * character array objects are appended to the sequence to accommodate changes
- * in the size of the character sequence.
- *
- * The constructor for basic_streambuf accepts a @c size_t argument specifying
- * the maximum of the sum of the sizes of the input sequence and output
- * sequence. During the lifetime of the @c basic_streambuf object, the following
- * invariant holds:
- * @code size() <= max_size()@endcode
- * Any member function that would, if successful, cause the invariant to be
- * violated shall throw an exception of class @c std::length_error.
- *
- * The constructor for @c basic_streambuf takes an Allocator argument. A copy
- * of this argument is used for any memory allocation performed, by the
- * constructor and by all member functions, during the lifetime of each @c
- * basic_streambuf object.
- *
- * @par Examples
- * Writing directly from an streambuf to a socket:
- * @code
- * boost::asio::streambuf b;
- * std::ostream os(&b);
- * os << "Hello, World!\n";
- *
- * // try sending some data in input sequence
- * size_t n = sock.send(b.data());
- *
- * b.consume(n); // sent data is removed from input sequence
- * @endcode
- *
- * Reading from a socket directly into a streambuf:
- * @code
- * boost::asio::streambuf b;
- *
- * // reserve 512 bytes in output sequence
- * boost::asio::streambuf::const_buffers_type bufs = b.prepare(512);
- *
- * size_t n = sock.receive(bufs);
- *
- * // received data is "committed" from output sequence to input sequence
- * b.commit(n);
- *
- * std::istream is(&b);
- * std::string s;
- * is >> s;
- * @endcode
- */
-template <typename Allocator = std::allocator<char> >
-class basic_streambuf
- : public std::streambuf,
- private noncopyable
-{
-public:
-#if defined(GENERATING_DOCUMENTATION)
- /// The type used to represent the input sequence as a list of buffers.
- typedef implementation_defined const_buffers_type;
-
- /// The type used to represent the output sequence as a list of buffers.
- typedef implementation_defined mutable_buffers_type;
-#else
- typedef boost::asio::const_buffers_1 const_buffers_type;
- typedef boost::asio::mutable_buffers_1 mutable_buffers_type;
-#endif
-
- /// Construct a basic_streambuf object.
- /**
- * Constructs a streambuf with the specified maximum size. The initial size
- * of the streambuf's input sequence is 0.
- */
- explicit basic_streambuf(
- std::size_t max_size = (std::numeric_limits<std::size_t>::max)(),
- const Allocator& allocator = Allocator())
- : max_size_(max_size),
- buffer_(allocator)
- {
- std::size_t pend = (std::min<std::size_t>)(max_size_, buffer_delta);
- buffer_.resize((std::max<std::size_t>)(pend, 1));
- setg(&buffer_[0], &buffer_[0], &buffer_[0]);
- setp(&buffer_[0], &buffer_[0] + pend);
- }
-
- /// Get the size of the input sequence.
- /**
- * @returns The size of the input sequence. The value is equal to that
- * calculated for @c s in the following code:
- * @code
- * size_t s = 0;
- * const_buffers_type bufs = data();
- * const_buffers_type::const_iterator i = bufs.begin();
- * while (i != bufs.end())
- * {
- * const_buffer buf(*i++);
- * s += buffer_size(buf);
- * }
- * @endcode
- */
- std::size_t size() const
- {
- return pptr() - gptr();
- }
-
- /// Get the maximum size of the basic_streambuf.
- /**
- * @returns The allowed maximum of the sum of the sizes of the input sequence
- * and output sequence.
- */
- std::size_t max_size() const
- {
- return max_size_;
- }
-
- /// Get a list of buffers that represents the input sequence.
- /**
- * @returns An object of type @c const_buffers_type that satisfies
- * ConstBufferSequence requirements, representing all character arrays in the
- * input sequence.
- *
- * @note The returned object is invalidated by any @c basic_streambuf member
- * function that modifies the input sequence or output sequence.
- */
- const_buffers_type data() const
- {
- return boost::asio::buffer(boost::asio::const_buffer(gptr(),
- (pptr() - gptr()) * sizeof(char_type)));
- }
-
- /// Get a list of buffers that represents the output sequence, with the given
- /// size.
- /**
- * Ensures that the output sequence can accommodate @c n characters,
- * reallocating character array objects as necessary.
- *
- * @returns An object of type @c mutable_buffers_type that satisfies
- * MutableBufferSequence requirements, representing character array objects
- * at the start of the output sequence such that the sum of the buffer sizes
- * is @c n.
- *
- * @throws std::length_error If <tt>size() + n > max_size()</tt>.
- *
- * @note The returned object is invalidated by any @c basic_streambuf member
- * function that modifies the input sequence or output sequence.
- */
- mutable_buffers_type prepare(std::size_t n)
- {
- reserve(n);
- return boost::asio::buffer(boost::asio::mutable_buffer(
- pptr(), n * sizeof(char_type)));
- }
-
- /// Move characters from the output sequence to the input sequence.
- /**
- * Appends @c n characters from the start of the output sequence to the input
- * sequence. The beginning of the output sequence is advanced by @c n
- * characters.
- *
- * Requires a preceding call <tt>prepare(x)</tt> where <tt>x >= n</tt>, and
- * no intervening operations that modify the input or output sequence.
- *
- * @throws std::length_error If @c n is greater than the size of the output
- * sequence.
- */
- void commit(std::size_t n)
- {
- if (pptr() + n > epptr())
- n = epptr() - pptr();
- pbump(static_cast<int>(n));
- setg(eback(), gptr(), pptr());
- }
-
- /// Remove characters from the input sequence.
- /**
- * Removes @c n characters from the beginning of the input sequence.
- *
- * @throws std::length_error If <tt>n > size()</tt>.
- */
- void consume(std::size_t n)
- {
- if (gptr() + n > pptr())
- n = pptr() - gptr();
- gbump(static_cast<int>(n));
- }
-
-protected:
- enum { buffer_delta = 128 };
-
- /// Override std::streambuf behaviour.
- /**
- * Behaves according to the specification of @c std::streambuf::underflow().
- */
- int_type underflow()
- {
- if (gptr() < pptr())
- {
- setg(&buffer_[0], gptr(), pptr());
- return traits_type::to_int_type(*gptr());
- }
- else
- {
- return traits_type::eof();
- }
- }
-
- /// Override std::streambuf behaviour.
- /**
- * Behaves according to the specification of @c std::streambuf::overflow(),
- * with the specialisation that @c std::length_error is thrown if appending
- * the character to the input sequence would require the condition
- * <tt>size() > max_size()</tt> to be true.
- */
- int_type overflow(int_type c)
- {
- if (!traits_type::eq_int_type(c, traits_type::eof()))
- {
- if (pptr() == epptr())
- {
- std::size_t buffer_size = pptr() - gptr();
- if (buffer_size < max_size_ && max_size_ - buffer_size < buffer_delta)
- {
- reserve(max_size_ - buffer_size);
- }
- else
- {
- reserve(buffer_delta);
- }
- }
-
- *pptr() = traits_type::to_char_type(c);
- pbump(1);
- return c;
- }
-
- return traits_type::not_eof(c);
- }
-
- void reserve(std::size_t n)
- {
- // Get current stream positions as offsets.
- std::size_t gnext = gptr() - &buffer_[0];
- std::size_t pnext = pptr() - &buffer_[0];
- std::size_t pend = epptr() - &buffer_[0];
-
- // Check if there is already enough space in the put area.
- if (n <= pend - pnext)
- {
- return;
- }
-
- // Shift existing contents of get area to start of buffer.
- if (gnext > 0)
- {
- pnext -= gnext;
- std::memmove(&buffer_[0], &buffer_[0] + gnext, pnext);
- }
-
- // Ensure buffer is large enough to hold at least the specified size.
- if (n > pend - pnext)
- {
- if (n <= max_size_ && pnext <= max_size_ - n)
- {
- pend = pnext + n;
- buffer_.resize((std::max<std::size_t>)(pend, 1));
- }
- else
- {
- throw std::length_error("boost::asio::streambuf too long");
- }
- }
-
- // Update stream positions.
- setg(&buffer_[0], &buffer_[0], &buffer_[0] + pnext);
- setp(&buffer_[0] + pnext, &buffer_[0] + pend);
- }
-
-private:
- std::size_t max_size_;
- std::vector<char_type, Allocator> buffer_;
-};
-
-} // namespace asio
-} // namespace boost
-
-#include <boost/asio/detail/pop_options.hpp>
-
-#endif // BOOST_ASIO_BASIC_STREAMBUF_HPP