Release Notes

1.46

Use BOOST_ASSERT instead of assert.
Fixed flush regression, see #4590

1.44

Lots of fixes in this version, almost all are by Steven Watanabe.

File descriptor fixes:

Breaking change: new constructors and open methods from file descriptors/handles for file_descriptor, file_descriptor_source and file_descriptor_sink. See the documentation for details. The old methods are still available if you define BOOST_IOSTREAMS_USE_DEPRECATED (#3517).
Add BOOST_IOSTREAMS_DECL to file_descriptor_source and file_descriptor_sink fixing their use in dynamic libraries (#4335).
Rejigger file_descriptors handling of std::ios_base::openmode to match std::fstream. In particular, truncate existing files, if std::ios_base::trunc is passed (#3323).
Open files in append mode on Windows instead of seeking to the end at every write when std::ios_base::app is passed (#3323).

Compression/decompression fixes:

Don't end the stream produced by a reading through a symmetric_filter prematurely (#2318).
Allow building zlib 1.2.4+, using a glob to include only source files that actually exist (#4091).
Fix compressing an empty string.
Allow bzip2 filters to be closed even if no input has been read (#3348).
Throw an exception on an unexpected end of file in bzip2_decompressor instead of going into an infinite loop (#2783).
Reset the crc for zlib when we reuse a filter.
Make gzip_decompressor a DualUseFilter (#1579).
Allow bzip2_decompressor to process multiple concatenated streams (#3853).

Other fixes:

Make aggregate_filter work with wide characters (#3851).
Make symmetric_filter compile with wchar_t (#3279).
Fix boost/iostreams/detail/resolve.hpp compilation on xlc.
Fix definition of multichar_dual_use_filter_tag (#3689).
Make concept_adapter work with custom char_traits (#2356).
On windows, open mapped files with just read/write permissions, rather than full control - which might not be available (#2996).
Make sure that direct_streambuf and indirect_streambuf are reset correctly on open (#4102).
Make basic_file and basic_file_sync Flushable (#2998).
Several documentation improvements, including documenting private mapping with mapped_file (#1612).
Make the tests more reliable by using Boost.Filesystem's unique_path instead of tmpnam (#2325).

1.43

More fixes.

Fix write_device_impl<ostream_tag> (#3839).
Fix error checks after calling SetFilePointer (#3953).
Gzip filter shouldn't require its source to be peekable (#3723).
In position_to_offset, only cast to stream_offset after calculating _Myoff (#3969).
ptrdiff_t is in std (#2505).

1.42

Fixed many outstanding issues. Thanks to Richard Smith for working on a lot of these changes.

Allocate exceptions on the stack, not the heap (#3612).
Fix unthrown exceptions. (#3311).
Use boost::throw_exception to throw exceptions (#2094).
Add missing include guard (#3010).
Use the correct type for buffer_size and pback_size parameters (#2894).
Support boost::ref(std::istream) in code_converter (#3011).
Fix CRC on x64 during gzip decompression (#3352).
Fix mapped file errors in windows (#3505).
Improved support for Visual C++ 2010.
Fix usage requirements in boost build.
Fix some boundary checks in restrict and slice.
Some minor documentation fixes.
Avoid Apple macro substitutions for check.

1.41

Some old unreleased developments. There are still several open issues that should be fixed in the next version.

Add a grep filter (#1627).
Support archives with multiple members (#1896).
Make tee work with input streams (#791).
Improved filesystem interoperability.
Several warnings fixed or suppressed (including #1618, #1875, #2779).
Various other fixes (including #1580, #1671).

1.35

1. The semantics of close has been modified:

Calling close with a std::ios_base::openmode other than in or out is deprecated.
A new overload of close taking a single Device argument has been provided as a convenience.
DualUseFilters receive only one closure notification.
Generic streams and stream buffers and filtering streams and stream buffers are now Closable. For filtering streams and stream buffers, close calls pop.

These changes will break some existing code. They were necessary to resolve inconsistencies in the prior specification that resulted in a number of reported bugs.

2. The function template slice has been introduced as an alias of restrict, for platforms that treat restrict as a keyword.

3. Numerous bugs have been fixed, many relating to close, copy, and file descriptors.

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)