Log of changes on this site
September 1996 through July 1997

Please refer to ChangeLog.html for the most recent changes

June-July, 1997

• Announced development of a new version of Linear Algebra classlib. One -- self-contained and fully tested -- piece is released: Brent's univariate optimization/root finding
  
• Added A solution to a Fragile-Base Class Problem to the digest of my C++ posts

May 16, 1997

• New v3.5 version of Venus, the flight-through-clouds thing
  
• Made a Mac distribution of version 2.3 of the Advanced i/o and arithmetic compression classlib
  
• Added description of a xPRAM field that contains Mac's birthday and the total time alive, courtesy of John Goodman, to document "Saving/restoring PRAM and Extended PRAM"

April 18, 1997

Added:

• tail-f: file watching CGI script
  A Web equivalent of the UNIX "tail -f" command: watches a specified file (pipe, device: any sequential stream), sending updates to the user via a server push. Described in an article The Web IS a computer, HTML its language (and a pushy Scheme CGI setting it off)
• Makefile and Makefile.incl, which show how all the modules making up the Scheme archive can be compiled into a library, and tested

Updated:

• Scanning of a UNIX (POSIX) directory (readdir.scm, vreaddir.scm) has been rather extensively re-written, using Gambit's 2.4/2.5 new foreign function interface. Directory not found, Access denied etc. errors now raise a ##SIGNAL.IO-ERROR, which can be ##caught; the file-info object now responds to (file) permission queries. The validation code, vreaddir.scm, now checks that system errors are properly raised and handled; it verifies file/directory permission queries. 'ls -l' emulation is complete.
• A complete test run output for all validation tests now includes verification of readdir and file-info services
• OS-spec.scm was rearranged to group logically related primitives; it includes now OS:string->date date parsing function, OS:putenv, OS:umask, OS:sleep, and stderr redirection procedures.
• cerr stream manipulator is now given an argument: a port. That caused few very minor modifications in myenv.scm, env.scm, and vendian_io.scm

  Everything now works with Gambit-C 2.5.1

March 14, 1997

• New version, 2.3, of the Advanced i/o and arithmetic compression classlib. See a README file for more information and version history
  
• Added a new document "Saving/restoring PRAM and Extended PRAM" that tells in great detail what xPRAM is, what is in there, and how to read and write it
  

February 7, 1997

Added:

• Yet another kind of environment
  something like a pool dictionary in Smalltalk, a global dictionary that follows no scope. Still one can capture a part of it for private use
• catch-error.scm, a rather useful piece of code that makes sure a test case that was supposed to fail fails indeed
• vinput-parse.scm, a set of validation tests for parsing functions
• A complete test run output for all validation tests

Updated:

• Endian i/o package (endian_io.scm, vendian_io.scm) has been almost completely rewritten; an endian port created by the package behaves just as any other Scheme port, with some extended functionality provided through a ioctl interface
  • a dependent TIFF package tiff-prober.scm, tiff.scm was updated accordingly
• myenv.scm is extended with assoc, assv, assq primitives with a default clause
• vmyenv.scm has been greatly expanded to perform thorough tests of myenv.scm and env.scm, including extensive error checking
• OS-spec.scm was updated for Gambit 2.4g new foreign function interface

January 17, 1997

• A chess tournament scheduling code, described in the DDJ article Scheduling Algorithms and NP-Complete Problems, made available for download
• Added an implementation of a Turing Machine in Standard ML
  

December 24, 1996

• This site has moved again; alias http://pobox.com/~oleg/ftp/ was updated to point to the new location
  
• BeVenus recompiled for BeOS DR8
  
• Linear Algebra and Grayscale Image Processing code now work under BeOS DR8 too
  
• Index of my image compression papers is moved to a separate HTML document
  Many of papers are now available in the PostScript format (and via http rather than ftp)
• Added a simple implementation of <iostream> to the digest of my C++ posts
  

November 8, 1996

Many additions/updates to the Scheme code archive

• CGI:url-unquote: a CGI script utility for parsing of a QUERY_STRING
• next-token and skip-until input-parsing procedures can now take an EOF as a break-"character". Added two examples of next-token usage
• my default environment is extended with ++,--,++!,--!, when, and whennot (aka unless) convenience primitives (macros)
• scanning of a UNIX (POSIX) directory and getting file status information

September - October, 1996

• Added a very extended abstract scheming with the C preprocessor: a computable #include to the digest of my C++ posts
• Noted that a BeVenus port of a circling around in clouds application contains the POSIX implementation of rendering and modeling engines, which can be used on any POSIX/UNIX platform
• started using <META> document header tags
• The whole site is moved to another location. Please always use an alias http://pobox.com/~oleg/ftp/ to access it
• New version, v3.0, of Venus, the flight-through-clouds thing

December 1995 through August 1996