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 2005-11-22    ############################################    MK 2.4.9.5
 
     Main reason for this release is the 11-18 disk-full handling fix.
 
 2005-11-21    Optimization for access via c4_BytesRef::Access
 
     Added a noCopy flag (default remains as before), by A. Stigsen:
     When I first looked at c4_BytesRef::Access() I noticed that
     FetchBytes had the forceCopy option set. So I tried removing that,
     and that gave some improvement. But it still often happened that the
     item was in several segments, forcing a copy. So I have added a
     noCopy option to Access() to ensure that I do not get any uneeded
     memcopies. It gave a huge performance boost in my application, so it
     might be useful for others as well.
 
 2005-11-18    Fixed incorrect case of handling disk-full on commit
 
     This is a potentially serious bug (though all data can still be
     recovered if dealt with right away).  When an I/O error occurs
     under specific circumstances in the commit, the resulting file
     may be left in an improper state.  Full details are desribed in
     http://www.equi4.com/pipermail/metakit/2005-November/002144.html
 
 2005-11-16    Ranlib called too early
 
     Fixed call to ranlib when installing Mk4tcl.a - this was copied
     incorrectly by my from the 11-11 patches.  Thx A. Kupries.
 
 2005-11-15    Version number fixed
 
     Fixed version number mismatch (2.4.9.3, should now be 2.4.9.4).
 
 2005-11-11    Build fixes for Tcl (by Matt Newman)
 
     Added logic to disable mmap calls on some HP-UX versions.
     Plus other tweaks for the Tcl build.  Mods by Matt Newman.
     
 2005-10-01    The HP-UX fix did not work on macosx.
 
     Made the 2005-09-06 change below conditional on __hpux, so that
     builds on Mac OS X don't break, i.e. revert it.  Thx D. Steffen.
 
 2005-09-26    Linking with g++ i.s.o. gcc
 
     Fixed SHARED_LD to use G++ instead of gcc.  This caused problems
     when using the shared library from a gcc-compiled main.
 
 2005-09-06    Tweak Tcl binding to avoid compiler problems
 
     Made some changes to let HP-UX's aCC compile mk4tcl.{h,cpp}
     properly (no static inits with function ptrs?).  Thx Bob T.
     Also got rid of some warnings caused by const-ness mismatches.
 
 2005-09-05    Fix potential Tcl close problem
 
     Bug if a Tcl channel is still open on exit in mk::channel.  Fix
     thanks to Matt Newman.  Also cleaned up some old unused code.
 
 2005-06-10    ############################################    MK 2.4.9.4
 
     Maintenance release, consolidates over a year of changes/tweaks.
 
 2005-06-10    Adjusted Python builds
 
     Changed configure.in to use Python 2.4.x by default (was 2.3).
 
 2005-04-15    Fix typo in Mk4py code
 
     The 2005-01-29 changes had a typo (InsertA i.s.o. InsertAt).
     So no one built the CVS version since then?  (thx, Ben R.)
 
 2005-03-01    Fix for BTS#112, insert one part of a view in other
 
     Only showed up in debug builds, due to malloc overwriting mem,
     this was a dangling pointer.  Reported and fixed by A. Stimms.
 
 2005-02-18    Backed out of faulty change on 2004-09-23
 
     The c4_BytesRef::Modify change was not correct.  Will need to
     be reviewed again, thanks to P. Thoyts for reporting this.
 
 2005-02-14    Minor mods or PocketPC
 
     Changed some #defines to build under eVC4 for PoscketPC.
     Updated Tcl build to TEA 3.2 for same reason.
 
 2005-01-31    Updated Tcl build to use TEA 3.1
 
     A number of changes were needed to make the configure & make
     setup in the tcl/ area work with Tcl's TEA 3.1 build system.
     Install target not quite there due to missing doc/tests dirs.
 
 2005-01-29    Allow inserting view in Mk4py
 
     Fix by B. Kelley to support inserting a view into another.
     Properties in the source view will be added to dest as needed.
 
 2005-01-07    Some Mk4py fixes
 
     See BTS#105 for report, PyView.cpp leak fixed.
     See BTS#106 for report, submitter unknown (change in PyHead.h).
 
 2004-11-30    Added license terms in separate file
 
     As suggested by Daniel Steffen, see "license.terms".
 
 2004-09-23    Fix c4_BytesRef::Modify bytes insertion
 
     There was a bug preventing bytes from being inserted past the
     original size.  Reported by A. Stimms, disgnosed by B. Kelley.
     The solution was to remove an incorrect minor optimization.
 
 2004-06-03    Fixed missing include
 
     Added stdio include to mk4too.cpp, fixes Tcl 8.5 compile.
 
 2004-05-20    Mac OS X tweak
 
     Fix gcc shared lib builds flags for Mac OS X (thx D. Steffen).
 
 2004-04-27    Optimization of blocked views
 
     New caching of most recent subview block saves a lot of time when
     frequently getting and storing values (also in sequential order).
     Effects depend on usage pattern of course, expect 10..40% gain.
 
     Many thanks to M Berk for submitting a good working patch, which
     was then further tweaked.  No change in API / usage / storage.
 
     With this improvement, blocked views are highly recommended for
     larger views, i.e. millions of rows (up to address space limit).
     This requires C++, Mk4py, or Oomk/Mk4too (not Mk4tcl).
 
 2004-04-26    Python Unicode strings and distutils test suite
 
     Did some work to integrate Nicholas Riley's PyRowRef.cpp changes
     into the core.  Now supports unicode and rejects strings which
     have null bytes in them (use 'B' i.s.o. 'S' type to accept 'em).
 
     Tweaked setup.py a bit to properly run "python setup.py tests".
     This required a hack I don't understand, lines 135 and on, marked
     "jcw".  Without these extra imports, the tests are not found.
 
     Merged tweak to PyView.cpp to barf on view.append with >1 args.
 
     Thanks to Nicholas Riley for lots of improvements.
 
 2004-04-24    Autoconf tweaks
 
     Dropped LINK_SPECIAL_FLAGS="-rpath ${libdir}" from configure.in,
     which was causing havoc on Linux: make & make test work again now.
 
     Fixed configure.in + Makefile.in to support static builds again.
     The Tcl static target is now Mk4tcl.a i.s.o. libmk4tcl.a (ouch).
     
     For Tcl and Python, the following now works on my Linux box:
         ../unix/conficure --with-tcl=/usr/include --with-tcl=/usr
     More elaborate params are also supported, see "configure --help".
 
 2004-03-30    Fix opening Win32 files with unicode/multibyte chars
 
     The _open call used on Win32 is not Unicode/multi-byte friendly (!).
 
     Added code to try a conversion and use the _wopen variant when the
     _open fails.  This should work for opening existing files and for
     creating new files as long as the file tail does not have special
     chars (i.e. only special chars in the directories leading up to it).
 
     Also removed UTF conversions from mk4tcl.cpp (Windows build), which
     interfere with this new logic.
 
     Detected and resolved by Jeff Hobbs for use in the Mk4tcl extension.
 
 2004-03-09    Added new build files for Mk4tcl
 
     Added the TEA configure system to tcl/, so that Mk4tcl can now also
     be built with that approach.  This supercedes the current Mk4tcl
     code in unix/Makefile.in, which will probably be dropped soon.
 
 2004-03-08    Added DESTDIR to makefile
 
     Added Stuart Cassoff's patches to support DESTDIR in the Makefile.
 
 2004-03-07    Removed libtool dependency
 
     Thrown out libtool, it is more hassle than it's worth.  Adjusted
     configure.in and Makefile.in accordingly - these changes are very
     preliminary, all help to fix remaining platform issues appreciated!
 
 2004-03-03    Added Microsoft Visual Studio 7.0 project files
 
     Added a new win/msvc70/ directory with all MSVC 7.0 project files.
     With thanks to David Van Maren for sharing his work on this.
     
     Also added David McNab's info on how to build Mk4py with older
     versions of Python.  See python/README-dmn for details.
 
 2004-02-29    Fix in Mk4tcl property caching
 
     In very specific cases, Mk4tcl does not properly track properties
     cached in a Tcl_Obj*.  This affects byte-compiled code when there
     are properties using the same name but with different types.  Fixed
     in the mk4tcl.h and mk4tcl.cpp sources.
 
     Also optimized selections a bit further (pass Tcl_Obj* instead of
     strings to force more typed matches, and avoid some c4_String's).
 
 2004-02-16    Minor tweaks
 
     Change in std.h (for STL) to build with Borland C++ 5.0, and a typo
     in checking code of c4_View::IsCompatibleWith, which means incorrect
     use of MK was not detected properly (can't happen in blocked views,
     the main call point of this routine).  Reported by M Dierolf, thx!
 
 2004-01-28    Free space query
 
     Added a new FreeSpace() member to c4_Storage to determine how much
     unused space is in a datafile.  The validity of the returned values
     has not been verified yet, it's an "undocumented feature" for now.
 
 2004-01-26    ############################################    MK 2.4.9.3
 
     Maintenance release, consolidates past 9 months of changes/tweaks.
 
     Fixed test for "__name__" in python/metakit.py to run a quick test.
 
 2004-01-22    Fixed refcount problem with temp rows in Mk4tcl
 
     This was a long-standing bug: "mk::row create" did not work right
     because the tracking of temporary rows was completely messed up.
     Added test case for Tcl (mk6.8), fixes FB14, BTS#78, and BTS#29.
 
 2004-01-21    Documentation updates
 
     Updated copyright notices to 2004, and udated to Doxygen 1.3.5 for
     a new set of C++ documentation.  In anticipation of next release.
 
 2004-01-20    Don't trip over duplicate property names
 
     Added code in c4_Field constructor to avoid crashing when there is a
     duplicate property name in the format description string.  Duplicate
     names are now ignored (there is no good way to report errors at this
     point).  Avoids an even bigger problem: conflicting property types.
 
     Added test s49 to detect this case (FB20, reported by Brian Kelley).
 
 2004-01-18    Fixed rare but very serious subview resizing bug
 
     Fixed rare but serious file damaging bug, when resizing a comitted
     subview to empty, committing, and then resizing back to containing
     data.  Added new s48 test to force this bug to the surface.
 
     Fortunately this usage pattern *never* happens in blocked views!
     Fixes are at the end of c4_FormatV::Insert and c4_FormatV::Remove.
 
 2004-01-16    Gracefully deal with bad property type specifiers
 
     When GetAs is a called with a bad description, such as for example
     "myview[name:A]", the release code would crash on a null pointer
     dereference at some point.  Changed so the code now treats any type
     it does not know about as "I" (works a bit better than using "S").
    
     The debug build still hits an assertion, as before.  Added s47 test.
 
 2004-01-03    Fixed typo in PyView.cpp
 
     Forgot to fix closing brace after the 2003-12-11 mods.
 
 2003-12-21    Fixed Mk4too sorting on subview of length 1
 
     There was a silly bug when sorting on subviews in the new Mk4too
     interface (not in Mk4tcl), which returns a view, instead of a list
     of integers.  In the case of 1 row, optimization was done wrongly,
     omitting the sort as well as the remapping.  Fixed.
     
     Oomk needs to be patched to work around this (don't sort if n=1).
 
 2003-12-13    Tweak to avoid two unisgned/signed compiler warnings
 
     In remap.cpp, compiled in debug mode on Win32 (DWORD vs. t4_i32).
 
 2003-12-11    Checked in numerous changes to Mk4py by Nicholas Riley
 
     All changes are local to the python/directory - for details, see
       http://www.equi4.com/pipermail/metakit/2003-September/001407.html
     With a big thank you to Nicholas for contributing these improvements.
 
 2003-11-23    Bumped to Python 2.3, doc tweaks, lots of name fixes
 
     Adjusted makefile to now look for Python 2.3 by default.
     Regenerated config files.  Fixed obsolete links in the doc files.
 
     Got rid of tons of Metakit "interCap" cases, should be Metakit.
     This affects a huge number of source files and one #define (which
     has been defined twice for compatibility: d4_MetakitLibraryVersion).
     Use "cvs diff -i" to see real changes, other than case swapping.
 
 2003-10-28    Get rid of --enable-python, check in c22.txt
 
     It's not valid, but some files mentioned it.  Use --with-python.
     Forgot to check in the new c22.txt file added earlier this month.
 
 2003-10-16    Added note to Tcl docs
 
     Added a note to doc/tcl.html on how to load a MK datafiles stored in
     another one, as needed when using VFS for example.
 
 2003-10-10    Added c22 test
 
     Added test to make sure groubpy/select bug is not present in the C++
     core (bts #75 reports the bug found for Mk4tcl/Mk4too).
 
 2003-10-01    Fixed bugs in Tcl test suite
 
     The tests in tcl/test/ were incorrectly closing non-test datafiles,
     such as the "exe" one open while tclkit runs, and needed when a
     slave is created which needs to re-run init.tcl etc from VFS.
     
 2003-09-30    Python 2.3.1 & cleanup
 
     Tweaked PWONumber.h and PyRowRef.cpp and MSVC6 project so it can
     compile Mk4py for Python 2.3.1 again.  Windows binary uploaded.
 
     Removed the win/msvc60/tests/ directory, it's no longer needed.
 
 2003-09-20    Autoconf and libtool rebuilds
 
     In an attempt to stay ahead of version trouble and other nonsense,
     the autoconf / configure and libtool files have been regenerated.
     Autoconf is at 2.57 and libtoolize is at 1.4.3 on this dev system.
 
 2003-08-26    Documentation fix
 
     Fixed install comments for Mk4py, as reported in bts #59.
 
 2003-07-17    Fixes to Mk4py (Gordon)
 
     Fix crash when db.description(nm) is called for missing view "nm".
     Fix wrap - for the special case of wrapping a list of primitives
     (eg, ints, floats, strings) in a single property "view".
 
 2003-07-11    Fix for Linux not finding .lai file
 
     Posted for RH 8.0 on MK mailing list by Jeff Web on July 3rd.
 
 2003-07-01    Fixed "Metakit" (preferred) vs "Metakit" (obsolete)
 
     Get rid of InterCappedWords.  Time to grow up, d00d...
 
 2003-06-06    Fix to Mk4py for case (in)sensitivity.
 
     When using a dict (or keyword args), makeRow now gets the
     names from the dict's keys and gets the properties by name.
     This allows case insensitive matching. Note that using an
     instance still requires that the instance attributes have
     names that match (case sensitive) with the view.
 
 2003-05-15    Add distutils setup.py script (Gordon).
 
     Tested on Linux & Windows (MSVC).
     You can now do a plain configure / make (without python)
     then cd python; python setup.py build | install
 
 2003-05-08    Fixed array bound bug when not using mmap-ed files
 
     There was an incorrect test, when dealing with a new file and
     memory mapping is not enabled (which is uncommon, these days).
     Thanks to V Demarco for catching and resolving this bug.
 
 2003-04-28    Sourceforge
 
     Synced to SF's CVS, see http://sourceforge.net/projects/metakit
 
 2003-04-25    Autoconf/libtool update
 
     Did "autoreconf -force" with autoconf 2.5.7 and libtool 1.4.3, as
     suggested by Gerfried Fuchs/Ryan Murray.  Some Makefile.in tweaks.
 
 2003-04-22    Fixes to Mk4py (Gordon).
 
     Make view.append(instance) work again.
     Fix recursively adding subview data.
     Make properties compare properly.
     Initial (incomplete) unittest based test script.
 
 2003-03-16    ############################################    MK 2.4.9.2
 
     Also allow passing pairs to "mk::row append" as a list (Mk4tcl).
 
 2003-03-10    Fixes for sparc64 configure and AIX strcasecmp
 
     Both changes contributed by Andreas Kupries.
 
 2003-03-07    Fix more bugs in blocked view, add 64-bit Sparc support
 
     The blocked viewer deletion was STILL incorrect.  Fixed bad offset
     calculations, added several more assertion checks, and added a new
     m07 test case which checks for numerous cases of deletion overlap,
     i.e. cases where multi-row deletions cross subview boundaries.
 
     Added __sparc9 #define to mk4.h (thanks again, Andreas K)
 
 2003-03-05    Fixed two potential races in C++ threaded build
 
     There was a serious bug in view.cpp, whereby Unix (p)thread locks
     were non-functional in release mode (#define NDEBUG).  Yikes!
 
     In addition the logic was flawed (both Unix and Windows), failing to
     protect from indexing while sPropNames / sPropCounts were being
     resized (i.e. a realloc).  Added explicit locking to all affected
     paths, and removed the now obsolete count locks (i.e. AddRef).
 
     Thanks to Murat Berk for chasing this and explaining the problem.
 
     This bug "only" affects C++ builds.  Tcl and Python each have an
     extra layer on top which means there can be no races inside MK.
 
 2003-03-03    ############################################    MK 2.4.9.1
 
     Moving to a new 4-level bugfix release number.
 
 2003-03-02    Fixes to Mk4py (gmcm)
 
     Modify some recent patches that were Python 2.2 only so they would
     still work with 2.1. Add a view.properties() method (returning a
     dict of propname -> Property) for cases where a property is masked
     by a method name.
 
 2003-03-01    Reverted changes in Mk4py/scxx, avoid Mk4tcl warning
 
    One was in SCXX, PWONumber.h - ouch and apologies (jcw).  Changed
    comparison logic in mk4too.cpp (64-bit ints, new code).
 
 2003-02-28    Fixed relaxed layout in Mk4tcl, several Mk4py fixes
 
    Use list operators to convert a Tcl layout to MK format.  This used
    to crash, Tcl test 6.7 added to verify the fix.  Changed test 3.1 to
    use a different notation for nested defs (^).
 
    Added to ViewerAsSeq, to allow v1+v2+v3 (thanks Michael Scharf).
    Also fixed several mem leaks - thx again!
 
 2003-02-27    Added support for HPUX aCC "long long"
 
    Added #ifdef's to mk4.h to match autoconf HAVE_LONG_LONG settings.
    Tweaks to configure.in by Andreas K to better support HP/UX (thx!).
 
 2003-02-26    Added 64-bit int support to Mk4tcl, fix mingw
 
    The "L" type was not exposed, though Tcl >= 8.4 has "wide" ints!
    Will now support 64-bit ints, if built against a Tcl 8.4+ header, but
    still defaults to without for use in Tcl's <= 8.3.
 
    Fix _strdup #ifdef in univ.cpp when compiled from mingw on win32.
 
 2003-02-24    Break was missing in switch Mk4py
 
    Fixed a serious problem, which must have come from editing too
    wildly (Mk4py needs a test suite!).
 
 2003-02-20    Remove a stray include, remove CR's
 
    Remove "#include <stdio.h>" from remap.cpp, leftover from debugging.
    Also removed CR's left behind from editing under Windows (doh!).
 
 2003-02-18    ##############################################    MK 2.4.9
 
    This is mostly a bug fix release (some features added to Mk4tcl).
 
 2003-02-18    Fixed a bug in blocked view deletion, and hash byteorder
 
    There was an off-by-one error in the deletion of multiple rows
    which span more than an entire subview block.  Test m06 is ok now.
    Also added consistency checks (when compiled in debug mode).
 
    Fixed a too-strict assertion in mk4tcl.cpp, Item destructor.
 
    Fixed a byte-order sensitivity in hash views for numeric properties.
 
 2003-02-17    Configure tweaks for hpux/ia64
 
    Re-instated hpux changes by A. Kupries, for ia64, also -lpthread.
 
 2003-02-14    Bug found in blocked viewer modification
 
    Added test m06 to catch a problem first detected in the Tcl test
    suite (test 5.7) - recoded to C++.  This is a show-stopper for the
    upcoming 2.4.9 release - fixing it is now a top priority.
 
 2003-02-14    Some changes to OO interface in Tcl
 
    The OO "select" cmd now returns a view, not a list of row #'s.
    Added "product" and "rename" operators, they were not exposed.
 
 2003-02-14    Enable stdio buffering
 
    On platforms where stdio is used, the setbuf(..., 0) calls have been
    removed (fileio.cpp).  This improves performance, and lets caller set
    up whatever buffering they like.
 
 2003-02-07    Tweaks to restore broken MK ports
 
    Fixes by A. Kupries to fix MK builds I broke (Itanium/HPUX).
 
 2003-02-07    Changed code to avoid compiler warning
 
    In remap.cpp, LookDict(), add return at end to avoid a mistaken
    compiler warning (on AIX 5.1).  No effect on runtime behavior.
 
 2003-02-02    Work around optimizer bug in gcc 3.2.1
 
    The sign-extension in c4_ColOfInts::Get_16r was not being done right
    with -O2 on Linux.  This only manifests itself with files having
    reversed bytes (e.g. PowerPC/Mac).  Changed code to use a local temp
    buffer instead.  This bug was the reason why some starkits failed to
    load when created on Mac and used on Linux.
 
 2003-01-24    Fixed cleanup order bug in Mk4tcl
 
    There was a long-standing bug in Mk4tcl, in which cleanup order of
    MkPath objects caused them to access their MkWorkspace parent even
    though it was already deleted.  This may have caused some of the
    crash-on-exit bugs in the past.
 
 2003-01-22    Add missing -lstdc++
 
    For unknown reasons, the current make failed to produce shared libs
    with libstdc++ linked in - manually added to LDFLAGS again.
 
 2003-01-19    Tweak to temp object use
 
    Two changes in handler.cpp to avoid bug in compilers which get the
    cleanup logic of temp objects wrong (thx, Dan Gregory).
 
 2003-01-17    Add synonym for mk4tcl "info" command
 
    To avoid a name clash, "$view info" can now also be written as 
    "$view properties" (or an abbreviation of that).
 
 2003-01-16    Allow access to root view in Mk4tcl
 
    Access to root view (i.e. the storage object itself) was not
    allowed - added a small change to allow this (MkPath::AttachView).
 
 2003-01-15    Use strdup
 
    On Unix, use strdup i.s.o own code for _strdup, see univ.cpp.
    Perhaps it's time to start reversing the names, and make unix std.
 
 2003-01-10    Build improvements, Mk4py long and Mac improvements
 
    Merged changes submitted by Nicholas Riley (thanks!) into CVS:
    - changes to build Mk4py on MacOS X (framework/dylib)
    - support 'L' fields, handle overflow, throw exceptions
    - the beginnings of a test suite for Mk4py (in python/test/)
 
    Separated PPC and 68K projects (Mac classic), because PPC is now
    built with 8.3 (Carbon support), while 68K requires 6.3.  The x86
    cross-compile-from-mac projects have been dropped.
 
 2003-01-09    String compare tweak, Mac Carbon runtime mmap code
 
    Use strcasecmp on unix, instead of own code (string.cpp).
 
    Added code based on Paul Snively's contributed patch to recognize
    running under OSX, so carbon apps can benefit from mmapped files.
    All changes are within fileio.cpp, requires CW8 to build this way.
    Added "PPC Carbon" target to cw.mcp, derived from "PPC DLL" one.
 
 2002-12-23    Tweak for Borland builder 5 & 6
 
    Changed #ifdef line 22 in univ.cpp (fix by S. Cusack).
    
 2002-12-09    Fixed bug in selection view change propagation
 
    Fixed a bug when a row is inserted in a view on which a selection
    depends, when the inserted position is not part of the derived one.
    This looks like an oversight in 2.3/2.4 changes, and must have been
    in there for quite some time.  Added new n14 test to verify this.
 
 2002-12-02    Fixed bug in MK old-file format conversion
 
    Fixed bug in on-the-fly conversion of old 1.x/2.0.x format files.
 
 2002-11-24    Fixed Mk4tcl threaded build
 
    Release and reclaim mutex lock while calling eval inside loops.
    Added "--enable-threads" option to configure script.
 
 2002-11-22    Configure tweak for HPUX/Itanium
 
    Removed ia64 check in configure.in, now that libtool has been fixed.
 
 2002-11-16    Tweaks to compile on Mac
 
    Small changes to the source code to avoid errors from the MWCW 8.x
    compilers.  Omit stricmp and strdup with CW version >= 8.
    
 2002-11-04    Fixed typo in Makefile
 
    This prevented Mk4py from getting installed (thanks F. Majid).
 
 2002-11-03    ##############################################    MK 2.4.8
 
    Reverted non-portable change in Makefile to copy to "Mk4tcl.*".
 
 2002-10-28    Workaround for bugs on ARM/WinCE and HP/UX, Mk4tcl/WinCE
 
    Turn off c4_ColofInts::Set_8i optimization when compiling for ARM on
    WinCE using EVC3.  All regression tests now pass (on ARM & x86emu).
 
    On HP/UX, enable copying in fileio.cpp, line 265, so a write is not
    done directly from a mmap'ed file (this can hang a process, hard).
 
    Added a "mktcl" subproject to msevc3, to build "Mk4tcl.dll".
    
 2002-10-27    Added multi-thread support for Unix
 
    Added changes to support same appartment-threading model on Unix as
    on Win32 (pthreads based).  This merely adds support to allow safe
    use of the current "each datafile in one thread" design on Unix.  All
    changes in view.cpp (thank you, M. Berk).  Define q4_MULTI to enable.
 
 2002-10-26    Merged WinCE changes
 
    Merged changes to build MK for WinCE using MS Embedded VC 3.0.
    These changes are based on Joseph Tate's modifications (thanks!).
 
 2002-10-21    Updated autoconf & libtool (on teevie)
 
    Files in unix/ regenerated with autoconf 2.53a and libtool 1.4.1.
 
 2002-10-16    Added "dup" subcommand to Mk4tcl OO
 
    There was no way to duplicate a view in the mk4tcl OO interface.
    Needed to properly deal with re-use / ref counts - added "dup".
 
 2002-10-11    Cast widened in Mk4tcl, support q4_TINY def for Mk4tcl
 
    Changed cast from int to long, to avoid compiler warning on some
    64-bit machines (mk4tcl.cpp, line 2013).
 
    Remove float/double code when q4_TINY is defined, also in Mk4tcl.
 
 2002-10-10    Makefile tweaks
 
    Removed duplicate flags from CXXFLAGS definition.
 
 2002-10-09    Fixed blocked/subview bug, tweak for the ARM platform
 
    Blocked viewers were not doing the right thing when rows had subviews
    in them - fixed the logic, and add a new m05 test to verify it all.
 
    Fixed a signed-char bug which prevented MK from passing all tests on
    the ARM, in this case the Compaq iPaq PDA with Linux and gcc 2.95.4.
 
 2002-10-07    Tweak to prevent gcc compiler bug
 
    Added intermediate temp var in derived.cpp to prevent gcc -O failure.
 
 2002-10-04    Config and makefile adjustments
 
    Adjusted configure.in to use ".sl" for HP-UX, and ".dll" for Cygwin.
 
    Changed "install -d" to "mkdir -p" (2x) in Makefile.in, since the
    former is not supported by all incarnations of install (A Kupries).
 
    Added @CXXFLAGS@ to the end of "CXXFLAGS =" lines in Makefile.in,
    as suggested by Donal K. Fellows.  Used for his IRIX(64) builds.
 
    Added logic to build properly on HP-UX, including a small assembly
    file (!) which allows loading C++ shared lib from C, as needed in
    Tcl - with thanks to Andreas Kupries for solving and patching this.
 
 2002-09-25    Build tweaks for Mac OS X
 
    Applied patches by Daniel Steffen to deal with ".dylib" (thanks!).
 
    Use -O i.s.o. -O2, which caused test b27 to fail on OS X (gcc 3.1).
 
 2002-09-09    More 64-bit platforms recognized
 
    Added #ifdefs for more 64-bit platforms, thanks to Reinhard Max.
 
 2002-09-08    Make tweaks for HP-UX
 
    Tweaks to build on HP-UX / 9000 (added __hpux #ifdef in header.h).
 
 2002-09-03    Fixed Mac OSX build problem
 
    Compile Mk4tcl lib with stubs only if building the shared lib.
    Ignore strip errors (fails with Mk4tcl.so on OSX / dyld libs).
 
 2002-07-01    Python and Tcl installation improved
 
    Now installs Python Mk4py.so and metakit.py in the most common dir
    location by default, i.e. "/usr/local/lib/python2.2/site-packages".
    Locations can be overridden through $pyincludedir and $pylibdir.
 
    For Tcl, "make install" now constructs a standard package dir, i.e.
    "/usr/local/lib/Mk4tcl/" with entries "Mk4tcl.so" and "pkgIndex.tcl".
    Locations can be overridden through $tclincludedir and $tcllibdir.
 
 2002-05-30    ##############################################    MK 2.4.7
 
    Fix CONST84 logic so source compiles under both Tcl 8.3 and 8.4.
    Fix creation of tests/CVS/ so diff in regression tests won't fail.
 
 2002-05-14    Fixed an adaptive int insert/delete bug
 
    Another bug in the 2.3/2.4 codebase, related to adaptive integers.
 
    Symptom: one int entry has incorrect bytes after insert/delete.
 
    Scenario: ints are 1..8 bits, and an odd number are added/removed,
    leaving an odd-sized internal "gap".  Then store a 16/32 bit value,
    forcing resizing.  Once this is done, there will be one value which
    cannot be properly read or set because its data is split *across* the
    gap (commit is ok and removes the problem).  Fix in column.{h,cpp},
    with a new regression test s46 added to make sure things are ok now.
 
    Let's hope that this is truly the *last* deeply embarrassing bug...
 
 2002-05-06    ##############################################    MK 2.4.6
 
    Recent bug fix was critical enough to warrant a new revision.
    It is safest to avoid using versions 2.4.2 .. 2.4.5 altogether.
 
 2002-05-05    Fixed major bug in string/bytes after multiple commits
 
    Finally found a way to reproduce spurious bugs reported in the latest
    revisions.  It turns out that one of the optimizations of the past 2
    months (no exact details) caused memo's to be tracked incorrectly in
    their free space use.  This causes trouble with strings over 10 Kb
    (or smaller if there are over 1000 rows).
 
    The bug is forced by new (frightfully short) test cases s44 + s45.
    Fixed by performing a slightly less agressive optimization in the
    c4_FormatB::Commit (which is also shared with strings, type 'S').
 
    Removed a "--exclude" from diff, which is not portable enough.
 
 2002-05-01    Added support for Windows CE
 
    Patches submitted by Joseph Tate (thank you!), with minor tweaks.
 
 2002-04-29    ##############################################    MK 2.4.5
 
    Various bug fixes, fixed a number of platform issues.
 
 2002-04-28    Fix small-int re-use view bug
 
    A nasty bug was reported by VPI which caused upper bytes to be
    truncated from int values.  The problem appears when storing ints of
    1..4 bits in a view, then clearing the view (so a gap is placed past
    the end of the column), then adding a row with an int of 2 or more
    bytes.  This uncovered a bug in forgetting to truncate columns with
    sub-byte int storage.  Now fixed, added regression test s43.
 
    This bug could also have affected string and byte storage, since
    these use int columns to store item sizes.  Under very specific
    conditions, it may have lead to truncated or even mixed-up values.
 
 2002-04-27    Fix nested mk4tcl loop bug
 
    Loops would exit prematurely when nested - due to objc/objv being
    overwritten in the inner loop.  Affects mk4tcl.cpp and mk4too.cpp.
 
 2002-04-10    Fix bug introduced in recent blocked viewer optimization
 
    Murphy was at it again.  The bug affected the way row inserts and
    deletes were done, and can cause incorrect data to be copied.  It is
    relatively hard to reproduce (the test dataset was 12 Mb), but the
    change explains things fully and is in fact very small.
    
 2002-04-02    Fix bug in debug code
 
    In remap.cpp line 531, a debug assertion was moved in the wrong way.
 
 2002-04-01    Backed out to libtool 1.4d, fix test diff and Tcl const
 
    Backed out to the more official 1.4d release of libtool (instead of
    the CVS version, which is adding "tags" we will not need anyway).
    The unix/Makefile.in has been simplified, back to how it used to be.
 
    Fixed the "diff" call at the end of "make test" so that it no longer
    generates extra output if things match and now fails if they do not.
 
    Added fix to allow compiling mk4tcl.cpp with "pre-constified" Tcl
    code, thanks to a tip by Don Porter (see "grep CONST84 mk4tcl.*").
 
 2002-03-31    ##############################################    MK 2.4.4
 
    Various bug fixes and (blocked view) performance enhacements.
 
 2002-03-28    More blocked optimizations, IRIX tweaks
 
    Switched Slot() to binary search.  This seems to slow down a few
    percentage point for smaller views, but with 5 millions rows this is
    reported to make a huge difference (from code by Zhang Dehua).
 
    Added header "bool" fix by Erik Hofman so MK compiles on IRIX (SGI).
 
 2002-03-27    Added definitions for AIX
 
    Added six operators defs before c4_Cursor class, to avoid compile
    errors on AIX.  With apologies to Murat Berk for taking so long...
 
 2002-03-26    Re-instated the c4_View::RelocateRows operation
 
    Re-enabled code which supports efficient moves of rows from one view
    to another - avoiding copying of subviews.  Strings/memos are still
    being copied for now.  Also moved a slow test out into a new call
    "c4_View::IsCompatibleWith", this must be checked to make sure that
    RelocateRows can work.  Passing incompatible views will still cause
    an assertion in debug mode, but must be avoided in release builds.
 
    This change ought to have a dramatic effect on inserts/deletes for
    blocked views with large subviews.  Added examples/blockdels.tcl to
    thoroughly exercise this new code and all boundary conditions.
 
 2002-03-22    Fixed a serious bug in serialization code
 
    When serializing string/bytes columns with large strings using the
    c4_Storage::SaveTo function, memo's would sometimes not be written,
    leading to a *damaged* datafile (and incorrect free-space tracking).
 
 2002-03-15    Better configure logic, "mk::view layout" fix
 
    Many tweaks to configures, makes, and libtool setup.  Get rid of the
    library version numbers and the special Mk4*.so targets.  Instead of
    Mk4tcl.so use libmk4tcl.so (likewise Mk4py.so is now libmk4py.so).
 
    Fixed "mk::view layout", it was broken by the 10-2-2002 change.
 
 2002-03-13    Extend partial access 'B' usage
 
    Added code to Access and Modify to simulate partial data access the
    hard way when the underlying view does not support it (c4_Bytes
    only), i.e. copy via full temp.  Added test s41, doing partial access
    on a blocked view.
 
 2002-03-12    Add test for serialized input
 
    The c4_Storage::LoadFrom() call (mk::file load) can be tricky.  After
    a commit, the header is adjusted so that reading from the start
    works.  This is not the case in commit-extend mode, where a load will
    read th state as it was before extending - it cannot know there is
    more.
   
    Added test s40 to verify this case.  Also reorged a few more files
    (tbasics and tstore4 split into 2 each).
 
    Added test in mk4tl.cpp so LoadFrom failure generates an error
    return, instead of being ignored.
 
 2002-03-10    Tweaked March 8 fix a tad further
 
    The workaround implemented below wasn't 100% complete.
 
 2002-03-08    Workaround for file extend on Win
 
    There seems to be a bug when extending a file on at least NT4 with
    NTFS (file server works fine).  When extending the file in such a way
    that a gap is created to save new data during commit, the file
    appears to get rounded up to the next 512-byte boundary.  At that
    point, the datafile no longer has a valid end marker and is sort of
    corrupt.
 
    Wrote workaround for Win32 builds, see persist.cpp notes names "March
    8, 2002".  One way to force this bug is to run "mkhash Dmhs 250000" -
    after row 150000, it asserts on bad filesize when built in debug mode
    and run on NTFS.
 
 2002-02-19    Fixed over-aggressive optimization
 
    Change made on Feb 7 was releasing too many objects in a commit,
    causing it to detach empty top-level views, even when in use.  Fixed,
    added s39 to test for this case.
 
 2002-02-10    Improve Mk4tcl's "mk::view layout"
 
    Avoid crash when asking for the layout of a non-existent view.  Now
    returns an error instead.
 
 2002-02-07    Fast commit with many empty subviews
 
    Avoid creating subviews when committing, if these are empty anyway.
    Added new s38 test for this case.
 
 2002-02-02    Small optimizations
 
    Changed a few c4_Property instances to const& references to avoid
    copying (2 in view.cpp, 2 in custom.cpp).
 
 2002-02-01    ##############################################    MK 2.4.3
 
    Bug-fix release, mostly.
 
    Python include path now upgraded to python2.2 (was 2.1).
 
 2002-01-31    Cross-platform serialization, Tcl
 
    There was a bug with serializing a datafile (SaveTo) when it was
    created on a platform with reverse endian-ness.  Fixed so serialized
    data also flags reversed byte order.
 
    Tweaks to fix const changes in the latest Tcl cvs branch.  Fixed a
    recently-introduced UTF8 path bug in mk4tcl.cpp.
 
 2001-12-21    Optimized GetAs
 
    Now that GetAs is used so much more, optimize the common case where a
    description does not require restructuring.  Can lead to order-of
    magnitude speed improvement in cases where a storage contains many
    views.
 
 2001-12-20    Fixed bug in Locate, comparison issue
 
    Testing for the Mk4py changes uncovered a serious bug in
    c4_View::Locate, causing it to sometimes return zero, even if there
    are matching rows (thanks, Gordon).
 
    But a very fundamental weakness also showed up, being that row
    comparisons (and that includes the C++ operators) have the confusing
    property of not being symmetric in all cases.  The problem occurs
    when left- and right-hand sides do not contain the same (number of)
    properties.  In that case, the *left-hand* row participating in the
    comparison determines which properties take part in a comparison.
 
    In the case of Locate, this caused improper comparisons.  And it is
    very easy to get bitten by this, such as here: c4_RowRef key = ...;
    int n = view.Search(key); bool match = n >= 0 && view[n] == key; The
    above code is *wrong*.  The last line needs to be: bool match = n >=
    0 && key == view[n];
 
    This is very clearly a design mistake.  Comparisons should have been
    *either* implemented *or* named differently.
 
    A new "m04" test has been added to the regression suite.
 
 2001-12-19    Changes to mk4py by Gordon McMillan
 
    Several changes and cleanups.  Mk4py now has logic to track different
    view categories, e.g. to make sure a R/O view is not being written
    to.  This should greatly reduce the number of silently ignored
    incorrect calls, as well as crashes, and will produce appropriate
    error messages instead.
 
 2001-12-18    Cleanup
 
    Cleaned up source comments and got rid of yet more warnings.
 
 2001-12-14    Fixed yet another case of crash-on-exit
 
    The new Unmapped() code of 2.4.2 forgot one case of cleaning up,
    which has now been fixed (in c4_FormatB::Commit).
 
 2001-12-12    ##############################################    MK 2.4.2
 
    Better portability, hashing improved
 
    This release marks the consolidation of a number of changes, mostly
    relating to better portability & hashing.  The speed of commits with
    many strings and subviews should be notably better.  The Tcl
    extension no longer needs a "stub" library to compile (it now has
    that code itself), just std headers.
 
 2001-12-08    Changes to commit cleanup, Mac stuff
 
    Changed the logic of how ReleaseAllSegments gets called at the end of
    commits.  There was at least one case of leaving a column pointing
    into mapped file space when it was about to be remapped.  This should
    fix a very long-tanding bug which shows itself as freeing unallocated
    memory during commit or cleanup of the storage object.
 
    Changes to test coding and PyRowRef.cpp to deal with builds on
    Macintosh (different issues for MacOS 9 and MacOS X).  The
    mac/cw.sea.hqx project has been upgraded to MW CW 6.3.  Verified Tcl
    8.3.2 and Python 2.1.1 builds with CW6 on Mac.
 
 2001-12-06    Tweaks to Tcl interface
 
    More robust, added "$vw loop var ... {body}" object command.  The
    "$vw size" command now takes an optional newsize arg.
 
 2001-12-04    Tweaks to makefile and configure
 
    Tweaks, in preparation of an upcoming 2.4.2 release.
 
 2001-12-03    Changes in M4py, avoid gcc problem, hash
 
    The "-fomit-frame-pointer" option for gcc has been turned off,
    because it causes problems with exception handling in Mk4py.  All
    failures in Mk4py now propagate properly to Python AFAIK.
 
    Simplified Mk4py - by removing a layer of exception handler classes
    in scxx.  Errors now set info and throw a plain int.
 
    The mkhash.cpp sample program exposed a problem with multi-key
    hashing: the order of properties in the search key must match exactly
    the order in the hash view itself.  For now, this has been left as is
    (it's easy to do, once you are aware of it).
 
 2001-11-30    Win MT fix, commit tweak, indent cleanup
 
    Drop static buffer in fileio.cpp (DataWrite), uses stack now, so the
    code can be used in MT context even on Win 95/98.  It does more
    copying than would be needed for NT (2K?), alas.
 
    More changes in c4_FormatB::Commit to properly detect memo use in
    blocked views.  The recent changes introduced a bug which shows up
    only with blocked views and large string/bytes items.  Reported by
    Steve Baxter with demo, new "m02" regression test.
 
    Changed fileio.cpp to turn off file buffering, this avoids a few
    reads when writing and seeking a lot.  It does not have as big an
    impact as one might expect, but every little bit helps.
 
    Cleaned up new 2-space indentation in several source files.
 
    Added new "mk::file space" in Mk4tcl, to inspect the current file
    space usage.  This is only intended for internal testing.
 
 2001-11-28    Fixed memory leak in string/memo cleanup
 
    There was a mem-leak in c4_FormatB::Commit which showed up due to
    yesterday's more extensive testing.  Only showed up after a commit,
    in string columns with widely varying item sizes.  This caused
    regression test s37 to fail in MFC-debug compile.
 
 2001-11-27    Major performance bug fix, and MT strings
 
    A serious problem has been resolved, which slowed down commits, and
    prevented blocked views from committing efficiently.  The reason was
    that for string props, the string size was always being saved anew,
    even if no changes in that view took place.  This did not affect
    proper operation, just speed, and was most noticeable with many
    (sub-)views containing many string props.
 
    The solution is in src/format.cpp, the examples/mkhash.cpp code was
    further adjusted to better expose and measure the effects.  Thanks to
    P. Baspeyras and S. Baxter for helping me resolve it.
 
    Another change was to alter the way empty strings are allocated in
    the src/string.cpp code, making it compatible with multi- threaded
    use and removing the remaining memory leak.
 
 2001-11-26    Fix in assertion check (blocked view)
 
    Corrected an off-by-one bug.  Only shows up with debugging on, since
    it's inside an assert().  Thanks to Steve Baxter.
 
 2001-11-25    More arg checking in Mk4py, locate
 
    Added more checks against incorrect usage, based on sample code by
    Mitch Chapman.  The "throw" code appears to be inconsistent when
    called at top of *some* calls, using a workaround for now.
 
    Added "view.locate(key)" wrapper, returns (pos,count) tuple.
 
    Various source code formatting adjustments (indents and such).
 
 2001-11-04    Added alternate calls to c4_CustomViewer
 
    Added extra defs to "mk4.h" of Lookup and InsertRows which take a
    "const c4_RowRef&" i.s.o. a c4_Cursor.  Inlined in "mk4.inl".  The
    "c4_Cursor" datatype might one day become obsolete.
 
 2001-11-03    Removed tcl/kit/ and copyright notices
 
    Removed the entire tcl/kit/ tree, Tclkit will be distributed as
    separate package from now on (the 2.4.1 release still builds ok).
 
    Also replaced all copyright notices by version Id's and an URL.
 
 2001-11-02    Fixed partial memo commit bug, makefile fix
 
    Modifying a small item as memo (i.e. through Modify) properly
    committed a change, but subsequently left an incorrect pointer after
    the commit.  Fixed, and added test s37 to catch this case.
 
    Don't strip symbols from installed static libs (whoops!).
    
 2001-10-31    Fixed Mk4py error flag clear on delete
 
    When deleting rows, a slice was constructed from a PWOSequence, which
    generates an otherwise harmless error when its length is checked.
    The flag was not cleared, causing errors in subsequent Python
    statements.  Changed to a PWOTuple in PyView.cpp (2x).
 
 2001-10-26    Fixed Mk4tcl re-open test
 
    The tcl/test/mk1basic.tcl test #6 was reporting open failure on
    non-Linux systems.  Fixed, the code works, the message was wrong.
 
 2001-10-19    Rearranged some demo files, Lua binding
 
    Rearranged some of the demos/samples from the python/ and tcl/ areas,
    and placed them in examples/ instead, for consistency.
 
    Added "selmap.tcl" to illustrate how to turn select into a view.
 
    Added a basic Lua binding (incomplete, but it's a start) in lua/.
 
 2001-10-18    Fixed recent hash bug, and add to ordered
 
    The recent "fix" to deal with hash misses introduced a huge bug,
    causing the mapping to be recalculated on each insertion.
 
    Adding to an ordered view did not always work, because the code was
    based on SetAtGrow, which is not suitable for an ordered view in
    which the row position is determined implicitly.  Fixed by changing
    c4_View::Add to use c4_View::InsertAt instead.
 
 2001-10-14    ##############################################    MK 2.4.1
 
    Custom-extended Tclkit, and threading
 
    Minor kitInit.c change allows wrapping apps as a "custom-extended"
    version of Tclkit.  Enable threaded Tcl build on Unix.
 
    This release consolidates the most recent fixes and code tweaks.
 
 2001-09-27    Fix temp storage open in Mk4tcl
 
    A recent change made it impossible to open temporary storages from
    Tcl ("mk::file open db") - <blush> - now fixed again.
 
 2001-09-19    Bug fixes
 
    Fixed a problem during commit, when memo's are modified, causing them
    to be stored inline again.  This caused a late reference to mapped
    memory - leading to intermittent crashes on commit.
 
    Changes/fixes in mk4tcl.cpp, to prevent a problem when a datafile is
    re-opened again under the same name later on.  Old references could
    in some cases end up stale - leading to crashes much later.
 
 2001-09-05    Bug fixes
 
    Hashing bug fixed: failed to terminate when looking for a missing key
    after a hash collision.  The fill count was not being tracked
    properly to enforce that there is always at least one unused slot.
 
    Fixed bug when setting a string from a higher row: the data gets
    trashed, because too little copying was done while creating a gap.
    This bug may have led to some other cases of "damaged" datafiles.
    Solved by copying input data in c4_FormatB::SetOne().
 
    Fixed long-standing bug with commit-after-load, by now doing a full
    view/subview copy.  This is inefficient, but it avoids all sorts of
    mapping/strategy problems.  This also fixes test s33 (at last!).
 
    Added regression tests b27, c21, m01, and s36 to check above fixes.
 
 2001-06-29    ##############################################    MK 2.4.0
 
    More changes to the Mk4py interface
 
     - allow setting a row to a value if the row has a single property
     - there is an unexplained crash when setting slices with wrong type
 
 2001-06-22    Changes to the Mk4py interface
 
     Modifications and fixes gratefully accepted from John Barnard:
     - c4_LongProp support ('L' datatype)
     - row.__attrs__ returns the list of all properties
     - row.__view__ returns the container view of the row
     - row.__index__ returns current position in view
     - view.setsize(n) added, extends/truncates number of rows
     - generalized makerow to allow any sequence, not just lists
     
     Changed PyRowRef to inc/dec the reference it has to the underlying
     view.  Should prevent dangling pointer problems, such as deleting a
     storage while rows are still in use.  This adds a little overhead.
 
     Fixed a PyErr_Clear issue when accessing non-existent properties.
 
 2001-06-12    Close DB filedesc on exec
 
     Added an fcntl call to fileio.cpp, so that on Unix database file
     decriptors are closed on exec (relevant when doing "exec ... &").
 
 2001-05-30    Fixed mem-leak in Mk4tcl
 
     A long-standing bug, in TclSelector::ExactKeyProps.
 
 2001-05-28    Security fix in Tclkit
 
     See end of the tcl/kit/README file for deatils.
 
 2001-03-30    Fixed long-standing commit bug
 
     There was an intermittent bug in c4_Persist::Commit, when properties
     were "restructured away" (dropped).  The bug was hard to track down,
     because it depended on what address ranges the O/S assigned to
     mem-maps.  Might also fix other spurious commit/exit crashes.
 
 2001-03-29    ##############################################    MK 2.3.4
 
     The "last" release candidate
 
     Now checked into its *new* CVS home at equi4.com.  Mailings list(s)
     have also been moved to this site.
 
 2001-03-28    Fix Win build, broken on Mar 27
 
     Dropped kBufMax from mk4.h, it caused compiler errors in MSVC6 -
     switched to "sizeof" in a couple of places.  This error was
     introduced by the double-fix of 3/27.
 
 2001-03-28    Allow builds of Tclkit with Sun CC
 
     Integrated a few changes provided by D.J. Hagberg.  Note: the
     M-solaris.sh and M-dyn.sh scripts need to be manually edited when
     choosing between CC and gcc.
 
 2001-03-27    Double-alignment bug on Solaris
 
     Two changes (c4_Bytes in mk4.h and src/column.h) to fix an alignment
     problem for 8-byte doubles on Solaris.  This caused tests b17, b23,
     b24, s22, and s28 to fail.
 
 2001-03-26    Fixed cross-platform commit bug
 
     There was a nasty bug in the 2.3.x code, which wrote incorrect field
     sizes when committing to a datafile with a different byte order
     (i.e. created on a machine using different endian-ness from the one
     doing commit).
 
 2001-02-14    Removed file events from Tclkit
 
     Changed kit/rechan.cpp to not generate file events.  This avoids a
     bug in Tclkit whereby an open file can generate a continuous stream
     of file events as long as the file is open - the console will seem
     to be frozen, though "close $file" does work and fixes it.
 
 2000-12-13    Added missing c4_LongRef export
 
     Added a line in mk4dll.h to resolve references to the new
     c4_LongProp/c4_LongRef datatype on Windows.
 
 2000-12-04    Fixed conversion bug
 
     There was a bug in c4_FormatV::OldDefine, causing MK to crash when
     trying to convert an old-format file with empty subviews in it.  Bug
     introduced on 14 Nov.
 
 2000-12-02    Fixes in Tclkit code
 
     Fixed a Tcl-level bug causing memory leaks for all compressed files
     stored with MK opened for reading.
 
     Disabled event sources (mk4tcl.cpp and rechan.cpp) to avoid a GUI
     freeze-up while a fake file is open.
 
 2000-11-16    Simplified c4_Storage
 
     Made some changes so that a c4_Storage no longer has a separate
     c4_Persist* copy.  As a result, a storage can now be reconstructed
     from any root-level view.  This generalizes views, and prepares for
     a merge.
 
 2000-11-14    Fixed mem leak in conversion code
 
     The conversion code from pre 2.3 files had a memory leak in
     c4_FormatV::OldDefine, causing f06 to leak, as well as several
     subsequent erroneous leak reports.  Changed a few "new" to "d4_new"
     calls along the way.
 
     Remove FlipBytes members, they are no longer needed.
 
 2000-11-08    Tclkit now in the distribution
 
     The "Tclkit" project has been merged into Metakit.  Details and
     updated build info at "tcl/kit/README".  The SourceForge CVS
     repository is up to date again.
 
     Mk4py: improved number conversion and error handling.
     
 2000-11-03    ##############################################    MK 2.3.3
 
     First final release candidate
 
     Yes, there will probably be a second one as well...
 
 2000-10-31    Improved error handling
 
     More logic added to catch errors in flush and streams.  This affects
     the C++ core as well as Mk4py and Mk4tcl.  API of c4_Stream::Write
     changed to return success flag.
 
 2000-10-30    Added autocommit call to Mk4tcl
 
     To better support VFS, Mk4tcl now has a new command "mk::file
     autocommit <db>" to force commit on close.
 
 2000-10-26    Changes to compile with Borland C++
 
     Minor tweaks to compile with Borland C++ Builder 4.0, which does not
     support "long long".  A new Kitviewer has been built (new code to
     replace c4_View::Describe).
 
 2000-10-03    Fixes for Alpha Unix
 
     Moved _item in column.h up to fix alignment sensitivity.  Config.h
     did not get SIZE_LONG right on Alpha Unix (0?).
 
 2000-09-27    Contributed fixes and Python 2.0b2
 
     Adjusted makefile to build with Python 2.0b2 release.
 
     Source code tweaks to avoid DEC CXX 5.7 compiler errors.  Add
     no-inherit flags for Win32 to not leak file handles.
     
 2000-08-27    Allow derived row deletes in Mk4py
 
     Added code to PyView.cpp to handle deletes (and slice deletes) in
     derived views, see "examples/derived.py".
 
 2000-07-30    Major auto-convert 1.8.6 file bug
 
     Bug in on-the-fly conversion of bytes properties ('B') in pre-2.0
     datafiles (i.e. 1.8.6 and earlier) resolved.
 
     Unfortunately, this bug cannot be 100% unambiguously fixed.  The
     new code *will* properly detect most cases, and convert both 1.8.6
     and 2.0 datafiles on the fly, but especially for views with only a
     few rows and at most a few bytes of data per row - the conversion
     *might* fail.
 
     In this case, MK will have to be compiled with a define to force it
     to either assume all old datafiles are 1.8.6 (-Dq4_OLD_IS_PRE_V2),
     or to assume that they are always 2.0 (-Dq4_OLD_IS_ALWAYS_V2).  If
     you are currently using MK 1.8.6, then you should *skip* the update
     to 2.01, and consider updating to 2.3.x.  This way you never have
     any 2.0 files around, and can force all your code to handle 1.8.6
     files properly (by using "-Dq4_OLD_IS_PRE_V2").
 
     See src/format.cpp, c4_FormatB::OldDefine for details.
 
     This bug *only* applies to bytes properties in pre-2.0 data files.
     Conversion of 2.0x files is unaffected.
     
 2000-07-25    Fixed new self-referential views
 
     The new recursive / self-referential view definition style has been
     fixed, e.g. "view[data:S,self[^]]" will now let you store a tree of
     arbitrary depth, with each 'self' subview having data and self
     properties.  See the demo in "examples/selfref.py" to see how this
     all works.
 
 2000-07-22    Fixed bug in double restructuring
 
     Solved a very long-standing bug in restructuring, which caused
     incorrect (non-zero, small) default values when a c4_DoubleProp was
     added to a view which already had rows.  
 
 2000-07-18    Added remapwith and pair to Mk4py
 
     Exposed C++'s c4_View::RemapWith as v1.remapwith(v2), and
     c4_View::Pair as v1.pair(v2) in the Mk4py Python binding.  Added
     pair.py, remap.py, and wrap.py in "examples/" dir.
 
 2000-07-12    Added metakit.py wrapper
 
     Added "metakit.py" script to wrap Mk4py, including a new
     metakit.dump() to pretty-print views.  More utility code will be
     added over time.  The preferred way to use Metakit from Python is
     now "import metakit".
 
 2000-07-06    Conversion fix, warning cleanup
 
     Fixed on-the fly conversion of old datafiles.  The free space was
     not managed properly - changed to never touch any data inside the
     file during conversion.
 
     Some source code change to get the compile through gcc flags
     "-fguiding-decls -Wall -pedantic -Wno-unused".  The only remaining
     complaint is about using "long long".
 
 2000-07-04    MkSQL subtree, "indexed" mapped viewer
 
     Added the sql and mksql subtrees to the distribution, with Gordon
     McMillan's MkSQL engine, written in Python.  The "isql.py" script is
     a simple interactive shell around it.
 
     Started work on a new viewer which maintains a persistent index (as
     a one-int-prop permutation), see src/remap.cpp.
 
 2000-07-03    Mk4tcl fixes
 
     Fixed view rename problem and "delete end" (Matt Newman).  Adjusted
     the tests in tcl/test/mk5object.tcl accordingly.
 
 2000-06-30    Tequila fixes
 
     Close fix and failure handler (Steve Landers).
 
 2000-06-29    ##############################################    MK 2.3.2
 
     First beta release
 
     The new release is 99% feature-complete.  What remains is to further
     document C++/Python/Tcl use and to fix bugs.
 
     Python sample code in "python/aside.py" and "python/find.py".  Tcl
     samples in "tcl/test/mk5object.tcl" and "tcl/mapped.tcl".
 
 2000-06-28    Hash/blocked/ordered: changes and fixes
 
     Changed hash insertion to insert at specified position.  This makes
     it possible to use hashes "under" ordered views.  For best
     performance, insert rows at end of hash views.
 
 2000-06-26    Documentation, example, Mk4tcl OO fixes
 
     Moved C++ member documentation out of "mk4.h" header.  Added
     examples/ directory, with a find.py timing example.  Fixed bugs in
     new Mk4tcl: "$vw find" and "$vw delete end".  Added tests for new
     Mk4tcl OO interface: ":mk5object.test".
 
 2000-06-16    Improved modifiable custom viewers
 
     The Pair and Slice viewers now support set/insert/remove, while
     RemapWith/Concat/Rename support setting values.  
 
 2000-06-15    Many changes to the Tcl code, hashing
 
     Contributed by Matt Newman, it adds support for most custom viewers,
     including the new hash etc.  Added a fast find.  Caveat: most old
     custom viewers are still not modifiable.
 
     Hash calculation improved, far less collisions than before.
 
     Blocked viewer seems to work.  Ordered on top is sub-optimal.
 
 2000-06-12    GetUpperLimit, Blocked, Ordered, mk4too
 
     Removed c4_View::GetUpperLimit (it's equivalent to GetSize-1 and was
     not being used anywhere).
 
     Start implementing c4_BlockedViewer, a simple balanced/blocked
     nested data structure.  Also started on a c4_OrderedViewer, which
     keeps the underlying view sorted during changes.  These two can be
     combined to implement an efficient 2-level btree.
 
     Adopted code by Matt Newman for oo-cmd's for Mk4tcl views.  First
     trials work, started to extend with new custom viewers.
 
 2000-06-09    Change case of a few Mk4py members
 
     Changed all top-level members in the Python interface to lower case:
     storage, property, view, wrap (will break existing code).
 
     Fix bounds check in Mk4tcl.cpp for commit/rollback (new code).
 
     Whoops, forgot to add new src/remap.{h,cpp} to the cvs tree.
 
 2000-06-08    Implemented hash lookup
 
     Added a new virtual c4_Sequence::RestrictSearch, which lets a view
     take over searching (used by c4_View::Find).  The result is that the
     new hash viewer gives a huge speedup for finds.  Find requests which
     require linear scanning are unaffected.
 
 2000-06-07    Documentation extraction based on Doxygen
 
     The automatically generated output from Doxygen is working out well
     and looking pretty, added "src/doxy.h" with more comments.
 
 2000-06-05    Started hash and btree custom viewers
 
     The hash implementation is nearly done, also usable from Python.
     Btrees are being implemented as fixed 2-level for now.
 
 2000-06-01    Fixes
 
     Fixed crash when opening missing file r/o new in 2.3.1 alpha.  Fixed
     incorrect on-the-fly-conversion of 2.0 format subviews.  Added
     "storage.aside(storage)" to the Python interface.
 
 2000-05-30    Fixed commit-aside
 
     The new commit-aside code was botched by recent changes.  Fixed
     SetAside to pick up new root seq, changed by implicit rollback.
     Note that a commit-aside is not finished until you *also* commit the
     secondary file containing all newly generated changes.
 
     Fixed bug in c4_BytesRef::Access, introduced in 2.3.1 alpha.
 
 2000-05-29    Added new 64-bit long datatype
 
     Added support for 64-bit longs (type 'L'), and c4_LongProp, etc.
     This type is not autosizing, it always uses 8 bytes per entry.  Uses
     "long long" or "__int64", else defines struct with 2 longs.  This is
     not yet correct for platforms which have no 64b ints.  No regression
     tests or Python/Tcl interfaces yet.
 
 2000-05-28    Better file mark scanning
 
     Added c4_Strategy::EndOfData, to determine the logical end of a
     Metakit.valuefile.  This call can be used to check whether a file
     contains any data, and whether a commit-extend has been performed.
     Old-style scripted documents (with preamble) can now be opened.
     Changed strategy class, DataSeek has been merged with read/write.
     Removed c4_LoadContext, LoadIt member moved to c4_Persist.
 
 2000-05-27    Tweaked configuration define's
 
     Make the release build the default (no assertions, use inlines).
     Enable booleans for gnuc by default (it's pretty standard by now).
     Added extra include path to better find Python's includes.
 
 2000-05-26    Fixed Tcl dependency
 
     Changed configure script to no longer look for Tcl if the
     "--with-tcl=..." parameter is not specified.
 
 2000-05-25    ##############################################    MK 2.3.1
 
     First alpha release
 
     Officially, this is "Metakit 2.3.1 alpha" (ignore "2.3.0" in mk4.h).
     All alpha's are 2.3.1 (beta's will be 2.3.2, finals start at 2.3.5).
     Builds on Linux/Mac/Win appear ok - as do Mk4py, Mk4tcl, and Tclkit.
 
 2000-05-06    Massive changes to the core
 
     To summarize the main issues: management info is now stored in such
     a way that it need not be read in right away - file open is now
     instant.  The S(tring) datatype is now stored as B, making it far
     more scalable (API/use is unchanged).  Storage objects now derived
     from views, both can be initialized from a stream (data will be kept
     in a buffer, beware of potentially large memory use).
 
     Several file format changes are "for future expansion".
 
 2000-05-05    Fixed builds without Tcl
 
     In 2.0.1, the make would fail if there was no Tcl to build with, or
     not an appropriate release.  Changed Makefile to report and skip Tcl
     builds in that case.
 
 2000-04-06    Fixed a nasty restructure/mmap bug
 
     When a property is deleted by a restructure, then committed, then
     later committed again, a problem can cause MK to crash.  It has only
     been detected in debug builds, but the problem turns out to be a
     fundamental one (only happens with memory-mapped files, if the file
     is resized).  Fix in next rel (c4_HandlerSeq::DetachFromStorage).
 
 2000-04-02    Memo properties are no longer needed
 
     The M datatype is gone from the public API (and now illegal).
     Everything binary should now be stored in B(ytes) properties, which
     then adaptively decide which internal format to use, based on a
     simple heuristic (which will be refined later).  Existing datafiles
     will automatically convert from M to B.  The partial Access and
     Modify calls now also work on B items.
 
 2000-03-30    Minor change in c4_Strategy
 
     Dropped the _keepAfterCommit flag in c4_Strategy, it probably has
     never been used and it interferes with new features.
 
 2000-03-27    Change in API for creating storages
 
     It is no longer possible to create a storage and define its
     structure with a single call.  Instead, open a storage in r/w mode
     (i.e. "1") and then call the (now public) SetStructure member to
     define the structure of all views.  This change is necessary to
     prepare for the upcoming "commit-aside" logic.
 
 2000-03-23    File format changes (in progress)
 
     The new file format has an incompatible header, so old code will not
     recognize new datafiles.  Major changes are: added a file tail
     marker, the serialized format is now a very good way to compress
     datafiles, since it can be efficiently opened in on-demand/mmap'ed
     mode.  The new format supports several planned features.  Code to
     convert existing files on-the-fly will be added before this change
     is released.
 
 2000-03-19    Added c4_Strategy::FileSize
 
     The Strategy::FileSize call is used for a file format change.
 
 2000-03-18    Added c4_View::Locate
 
     Locate returns the number of matching rows, and optionally the
     position of the first one, using binary search.  Like the
     c4_View::Search function, it requires the view to be sorted.
 
 2000-03-17    ##############################################    MK 2.01
 
     Maintenance release, it's solid
 
     Updated MK version number to 2.01, this maintenance release
     represents a very stable version.
 
     Small change to b07 test to avoid evaluation order problems.
 
     Added unix/metakit.spec file for RPM, thanks to Sean Summers.
 
 2000-03-16    Drop Store, fix deep copy, drop segments
 
     c4_Storage::Store never worked properly under all conditions.  It's
     been deprecated for some time and has now been removed.  Made a
     handful of changes to test- and demo code to drop it.
 
     Duplicating a view with deep copy never worked, because it used the
     buggy Store call as well.  Changed to use recursion.
 
     Dropped support for segmented tree-walk storage, which hasn't been
     used since 1.5 (use a commit with 2.0 to convert files).  This is
     necessary to prepare for some file format changes.
 
 2000-03-15    Modifiable custom viewers, other tweaks
 
     A start has been made with making custom viewers updatable.  The new
     methods are Set, InsertAt, RemoveAt, and Move, but the number of
     viewers which implement this is still limited.  Mk4py has been
     adjusted to allow "set" on wrapped views.
 
     Removed c4_Strategy::DataLoad, it was only used in one place.  Small
     optimization of the 2 calls to c4_Streamer::NextByte.  Get rid of /
     disallow read calls on memory mapped files.
 
 2000-03-14    Makefile tweaks, non-commits smarter
 
     Changed from --enable-tcl to --with-tcl=DIR, because the old
     approach only worked with Tcl installed in a standard place.
 
     Commits of a R/O file now fail.  Also, if no changes have been made,
     a commit will no longer write anything to file.
 
 2000-03-13    Several new commands added to Mk4py
 
     Several changes were submitted by Gordon McMillan, which add better
     support for his upcoming SQL engine.
 
 2000-03-12    Allow embedding MK datafile at end of EXE
 
     Mk4tcl was changed to look for an optional trailer for quick access
     to the start offset.  This makes it possible to append datafiles to
     executables, even if they are larger than 4 Kb.
 
 2000-02-29    Fixed rare bug with lots of memo fields
 
     There was a bug in free space management (persist.cpp), which can
     only occur when exactly 7500 free space gaps are present, and a
     commit crosses the threshold.  There was also a small mistake in
     that same code causing a bit of free space waste.
 
 2000-02-24    Added proxy support to Tequila
 
     Tequila can now be used as basic client/server setup for Tcl
     scripts.  See tcl/tequila/README for details and an example.
 
 2000-02-04    Fixed mk::views (Mk4tcl)
 
     The mk::views command failed to list the first view in the file
     (this bug was introduced by changes in MK 1.99).
 
 2000-01-02    Adjusted y2k
 
     Copyright and license dates adjusted.
 
 1999-12-26    More Mk4py changes
 
     Added sortrev, and fixed "select(low,high)".  Docs updated.
 
 1999-12-23    New view operators in Mk4py
 
     Added rename, project, groupby, and counts operators to Mk4py.
     These were already part of the C++ core.
 
 1999-12-22    Avoid GetId inline warning
 
     Reordered GetId in "mk4.inl" to avoid (harmless) inline warning.
 
 1999-12-21    Checked-in Catfish and Kitviewer sources
 
     Added win/catfish and win/kitviewer areas.  Catfish was built with
     MSVC 1.52, so the win/msvc152 area has also been added.
 
     Kitviewer requires Borland C++ Builder 4.0 to build (using VCL), it
     has been adjusted to now also recognize scripted documents.
 
 1999-12-20    Bug fix in set-after-get situations
 
     A bug has surfaced when setting string/byte/memo values which span a
     4 Kb block boundary.  The bug can only happen if data is first
     fetched and subsequently changed.  The affected code is in
     src/format.cpp (3x).  Added Tcl test 5.5 to catch this.
 
 1999-12-19    Mac tweaks
 
     Changes to make the Mac versions build from the CVS repository.  The
     Mac can also cross-compile Windows libraries using MWCW 5.
 
 1999-12-17    Add the Tequila example
 
     Added the Tequila global Tcl array data server, see tcl/tequila/.
 
 1999-12-15  MK 2.0      Official Open Source release
 
     Removed a bad assertion from FormatX::Compare.
 
     Several new services set up on the excellent SourceForge.com site.
 
 1999-12-14    Documentation added
 
     The C++ API documentation has been added to the distribution, as
     well as a document describing the file format details of Metakit.
 
 1999-12-13    Bug fix affecting c4_View::Description
 
     There was a problem with c4_ViewScanner::Describe, due to a change
     from c4_String to (const char*).  Now c4_View::Store works again.
 
 1999-12-12  MK 1.99     New release, as open source software
 
     The major change is that Metakit has been released as open source
     software, based on the liberal X/MIT-style license.  Commercial
     support remains unchanged for all recent commercial customers, and
     for those who purchase the Enterprise License.  The Universal Source
     license has been terminated, because full source code is now freely
     downloadable by anyone from the website.
 
     Sources and documentation files have been adjusted accordingly.
 
 1999-12-08  MK 1.9h     Bool support for gcc/egcs, minor fix
 
     Clear _field after delete in c4_HandlerSeq::DefineRoot.  This
     triggered an assertion on Linux, when compiled in debug mode.
 
     Added pre-processor logic to detect whether gcc supports bools.
 
     Removed all indentation from #define's, #ifdef's, etc.  This was
     done after a report that some compilers can get confused by this.
 
 1999-12-06    Derived view row copy fix
 
     There was a problem when using SetAt with derived views as source,
     due to a remapping problem.  Fixed viewx.cpp, added new test b25.
 
 1999-11-25  MK 1.9g     Makefile changes, thread-safe Mk4tcl
 
     Renamed options to --enable-python and --enable-tcl, both now off by
     default, since most people probably don't want to enable both.
 
     The new "-shared" changes to make Mk4tcl thread-safe have been
     folded into the main source code.
 
 1999-11-22    Channel improvements Mk4tcl
 
     There was a close conflict in mk::channel, also several changes to
     improve mk::channel fileevent handling.
 
 1999-11-19    Bug fix in Mk4tcl
 
     There was an array overrun when mk::get was called without fields.
     Added code to avoid this.
 
 1999-11-11    Mk4tcl exit handling
 
     Simplified Mk4tcl exit handling, fixes "interp delete" crash.  Added
     new mk5fixed.4 test to catch this case.
 
 1999-11-10    Mk4tcl shared and multi-threaded access
 
     Made a first experimental version of Mk4tcl (1.2.1, not announced)
     which allows sharing a database between interpreters and threads.
 
 1999-11-09    STL, MkWrap, compare caching
 
     Tweaked the makefile to support STL builds (also adjusted README).
 
     Fixed bug in MkWrap, calling storage.description() without args.
 
     Yet more fixes in comparisons, this is all one problem, caused by
     changes in caching for ints, floats, and doubles.  Added B24 test.
     These (last?) problems occured in custom / compound views.
 
 1999-11-08  MK 1.9f     Fixed sort comparisons
 
     There was a cache problem with comparisons of int / float / double
     sorts.  Fixed, also added new B23 regression test to check for it.
 
 1999-11-07    Little nasty details
 
     Tweaked some make/project files.  All regress tests and Tcl tests
     now reported to really work on Solaris, Linux, Windows, and Mac.
     Regression tests required more memory on Mac to get past L03 case.
 
 1999-11-06  MK 1.9e     Big oops: Mk4tcl and MkWrap were broken!
 
     Fixed a c4_Strategy / c4_FileStrategy mixup in Mk4tcl and MkWrap.
 
 1999-11-05    Simplify c4_Storage
 
     Moved state out of c4_Storage and into c4_Persist, to prepare for
     multi-thread wrappers.  Made a new, simpler design to achieve that.
 
 1999-11-04  MK 1.9d     Factor out stdio dependencies
 
     Moved all stdio dependencies out of core into new "fileio.cpp" src.
     The mk4.h header no longer includes <stdio.h>, added new "mk4io.h"
     header with a c4_FileStrategy class, derived from c4_Strategy.
 
     Also factored c4_Stream/c4_FileStream out of the c4_Strategy class.
     This alters the API slightly, but makes it 100% portable/embeddable.
 
     Added "tcl/iohan.tcl", a simple wrapper for generic storage access:
     locally, on a FTP server, in a local MK datafile, or using a remote
     Tequila server (see http://www.equi4.com/tclkit/tequila.html).
 
 1999-11-03    Improved detach/restructure handling
 
     Changed detach to drop all persistent formathandlers, but leave the
     number of rows intact.  It will be much faster to destroy columns
     than to delete (and propagate) rows.  The result is that a pointer
     to a view of which the underlying storage object goes away will end
     up with the same number of rows as before, but no properties at all.
 
     Fixed a problem which would have occured when properties are being
     "restructured away" and then committed.  The solution is to check
     for this and delete all such properties at commit time.
 
     Moved Buffer() out of c4_HandlerSeq and c4_CustomSeq, and made the
     new version in c4_Sequence allocate the c4_Bytes object lazily.
     Faster, and decreases sequence object size (for lots of subviews).
 
     Mk4tcl, mk::layout now returns the proper layout even if the views
     are empty.  Solved by adding extra arg to c4_Storage::Description,
     to return structure of a single top-level view.  Fixes "mk8basic.1",
     and the returned string now has one bogus list layer stripped off.
 
     MkWrap also adjusted with optional arg for storage.description().
 
 1999-11-02    New Wrap code in MkWrap
 
     MkWrap, added new Wrap(seq,props,byPos) member, a c4_CustomViewer
     which wraps any Python sequence as MK view (for use in joins, etc).
 
 1999-11-01  MK 1.9c     Mk4tcl changes
 
     Mk4tcl, several changes: added "-size" option to mk::get to return
     the size of prop value without fetching it (see new basic.9 test).
     Added "-globnc" for case-insensitive globbing (for regexp, this is
     available through the new (?i) metasytnax of Tcl 8.2 (see basic.10).
 
 1999-10-31  MK 1.9b     Solved shared lib unload with Tcl 8.2
 
     Changed property symbol table setup to avoid static initializers, to
     work around a problem with shared library cleanup from Tcl 8.2.
     Added new c4_Property::CleanupInternalData call to clean up 100%
     (this code need not usually be called, only if memory is tracked).
     This fixes the crash-on-exit bug in Mk4tcl (Linux and Solaris).
 
 1999-10-29    Make support for MkWrap and Mk4tcl
 
     Both MSVC and MWCW now also build Mk4tcl and MkWrap extensions.  The
     MWCW project compiles for Win and Mac *on* either Win or Mac.
     Makefile extended to build Mk4tcl and MkWrap, added dist target.
     Updated to latest Perceps 3.5 beta, started generating docs again.
 
 1999-10-27  MK 1.9a     New build / directory structure
 
     Completely reworked the directory structure to simplify all builds.
     Created new "builds/" area for all intermediate and output files.
     New MSVC 6.0 project structure created in "win/msvc60/".
 
     Moved Mk4tcl to the "tcl/" top-level directory, and MkWrap to the
     "python/" dir.  The MkWrap code has been removed from the project.
 
     Removed c4_View::Match and the regular expression package, since it
     can just as efficiently be done with a wrapper around MK, now that
     string results no longer allocate a temporary copy.
 
     Started writing a Tcl-based test suite for use with Mk4tcl.
 
 MAJOR CHANGE SINCE 1.8.6
 
     Merge handler.cpp and format.cpp classes to get rid of special-cased
     in-memory version of handlers.  This has major effects on how data
     is kept for unattached views (they still exist, but no longer
     special).  The code is leaner and meaner, it passes all regression
     tests.
 
 ALSO LISTED IN THE RELEASE HISTORY
 
     Added c4_MemoRef::Access and c4_Memoref::Modify for partial access
     to memo fields.  Avoids copying and allows inserts/deletes anywhere.
     MkWrap and Mk4tcl have both been extended to allow using Memo fields
     for simulated file IO (mk::channel for Tcl, MkMemoIO.py for Python).
 
     Added c4_Reference::GetSize to determine the size of a value without
     accessing it.  For ints, returns negated bit width if 1/2/4 bits.
 
     Added experimental c4_View::RelocateRows to move rows from one view
     to another (both must be in same storage, with the same structure).
     Moves do not involve any data copying w.r.t. subviews and memo's.
 
 The old release history is at http://www.equi4.com/metakit/history.html
 
 # vim: tw=72