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