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| author | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
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| committer | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
| commit | 0efa7c32aaf21a29b42b5926cc116007056843be (patch) | |
| tree | 882f663a5dd0e65694bf6077b71086dd77fd7ff8 /3rdParty/Boost/boost/asio/basic_streambuf.hpp | |
| parent | 1d20eabbc32274b491b4c2bedf73d19933d97bfd (diff) | |
| download | swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.zip swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.tar.bz2 | |
Moved some modules into separate git modules.
Diffstat (limited to '3rdParty/Boost/boost/asio/basic_streambuf.hpp')
| m--------- | 3rdParty/Boost | 0 | ||||
| -rw-r--r-- | 3rdParty/Boost/boost/asio/basic_streambuf.hpp | 340 |
2 files changed, 0 insertions, 340 deletions
diff --git a/3rdParty/Boost b/3rdParty/Boost new file mode 160000 +Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79 diff --git a/3rdParty/Boost/boost/asio/basic_streambuf.hpp b/3rdParty/Boost/boost/asio/basic_streambuf.hpp deleted file mode 100644 index db0e0c5..0000000 --- a/3rdParty/Boost/boost/asio/basic_streambuf.hpp +++ /dev/null @@ -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 |