Changes in PyFunge

0.5-rc2 (2009-04-24)

• Bug fixes.
  • Befunge-93 space now treats the cell as 8-bit unsigned integer.
  • New IPs cloned by t command are now guaranteed to be executed before parent IP.
  • u command does obey queuemode and invertmode from MODE.
  • F command of TIME was off by one. (0 should mean the first day of year.)
• Internal API changes. These changes don’t affect PyFunge v2 fingerprint API, but does require some trivial changes.
  • The return value of command callback (previously used to be walk flag) is now unused. Fingerprint modules for 0.5-rc1 will work correctly, but I strongly recommends to return None (or don’t use return at all) always.
  • funge.semantics.Semantics.execute() is gone, due to the prior change.
  • funge.semantics.Semantics.walk() is now a part of public API.
  • Individual access to funge.stack.Stack() is strongly discouraged. You should use funge.ip.IP()‘s stack stack wrapper instead. (If your fingerprint works on the stack stack, your code can be affected.)
  • funge.ip.IP.th_id and th_team became funge.ip.IP.id and team. funge.ip.IP.parentid is also available now.
  • funge.space.Space.put() has an optional third argument to optimize bulk changes to Funge space. You can use funge.space.Space.notifyrect() with it.
  • funge.space.Space.rectmin and rectmax became funge.space.Space.boundmin and boundmax. If you want the exact bounds use funge.space.Space.getrect() instead.
• Extensive optimizations resulted in 10–30% overall speed-up.
  • funge.space.Space.putspace() is 3x faster for huge code (say, more than 10000 commands).
  • funge.space.Space.scanwhile() and scanuntil is 2x faster for general case. These methods were bottlenecks of entire Funge code execution.
  • The stack API is revised to perform well even with or without invertmode and queuemode.
  • funge.program.Program.execute() now special-cases single IP, and 2x faster for that case.
• New Funge-98 fingerprints: 3DSP, ICAL, IIPC, IMAP, IMTH, LONG, NCRS, PERL, SCKE, SETS, SOCK, SUBR and TERM.
• Provides the complete documentation. Earlier version has some missing sections yet to be written.
• More regression tests in tests/ directory.

0.5-rc1 (2009-04-15)

• Full Befunge-98 compliance.
  • Rewrote problematic IP walking algorithm to get correct behavior of #, ', s and concurrency.
  • Fixed [ and ] command which got swapped.
  • Fixed / and % command so division by zero results in zero, not reflects.
  • Corrected k command. (Meaning of it was quite dubious, but now clear)
  • Fixed {, } and u command which had a number of bugs, including treating the argument with incorrect sign.
  • : always pushes two items, even if the stack has one or zero items.
  • Fixed faulty treatment of Unefunge and Befunge source code.
  • Almost complete change in internal API.
• A lot of code restructuring and refactoring.
  • All packages are merged into funge package.
  • Renamed internal classes.
  • funge.execute module splits into funge.languages package.
  • Introduced funge.vector.Vector class for convenience.
• Big improvement in performance (10x-40x speed gain), including:
  • More efficient space-related algorithms; they are also used only when needed. (8x speed gain)
  • Added dimension-dependent, caching Vector class. (2x speed gain)
  • General code simplification. (1.5x-2x speed gain)
• New command-line front-end, allowing the direct execution of all available languages.
• New fingerprint implementation, which API dubbed “PyFunge v2”. (See Writing fingerprint for more information)
• Implemented more fingerprints. (See Supported fingerprints for more information)
• Added the regression test suite. (See Tests for more information)
• Moved to Mercurial repository.

0.2-beta1 (2004-06-11)

• Initial release.