Change Log ---------- Version 1.35 Todd Showalter discovered that the number of free cells reported after GC was incorrect, which could also cause unnecessary allocations. Version 1.34 Long missing version. Lots of bugfixes have accumulated in my email, so I had to start using them. In this version, Keenan Pepper has submitted a bugfix for the string comparison library procedure, Wouter Boeke modified some code that was casting to the wrong type and crashed on some machines, "SheppardCo" submitted a replacement "modulo" code and Scott Fenton submitted lots of corrections that shut up some compiler warnings. Brian Maher submitted instructions on how to build on OS-X. I have to dig deeper into my mailbox and find earlier emails, too. Version 1.33 Charles Hayden fixed a nasty GC bug of the new stack frame, while in the process of porting TinyScheme to C++. He also submitted other changes, and other people also had comments or requests, but the GC bug was so important that this version is put through the door to correct it. Version 1.32 Stephen Gildea put some quality time on TinyScheme again, and made a whole lot of changes to the interpreter that made it noticeably faster. Version 1.31 Patches to the hastily-done version 1.30. Stephen Gildea fixed some things done wrongly, and Richard Russo fixed the makefile for building on Windows. Property lists (heritage from MiniScheme) are now optional and have dissappeared from the interface. They should be considered as deprecated. Version 1.30 After many months, I followed Preston Bannister's advice of using macros and a single source text to keep the enums and the dispatch table in sync, and I used his contributed "opdefines.h". Timothy Downs contributed a helpful function, "scheme_call". Stephen Gildea contributed new versions of the makefile and practically all other sources. He created a built-in STRING-APPEND, and fixed a lot of other bugs. Ruhi Bloodworth reported fixes necessary for OS X and a small bug in dynload.c. Version 1.29 The previous version contained a lot of corrections, but there were a lot more that still wait on a sheet of paper lost in a carton someplace after my house move... Manuel Heras-Gilsanz noticed this and resent his own contribution, which relies on another bugfix that v.1.28 was missing: a problem with string output, that this version fixes. I hope other people will take the time to resend their contributions, if they didn't make it to v.1.28. Version 1.28 Many people have contacted me with bugfixes or remarks in the three months I was inactive. A lot of them spotted that scheme_deinit crashed while reporting gc results. They suggested that sc->outport be set to NIL in scheme_deinit, which I did. Dennis Taylor remarked that OP_VALUEPRINT reset sc->value instead of preserving it. He submitted a modification which I adopted partially. David Hovemeyer sent me many little changes, that you will find in version 1.28, and Partice Stoessel modified the float reader to conform to R5RS. Version 1.27 Version 1.27 is the successor of 1.25. Bug fixes only, but I had to release them so that everybody can profit. 'Backchar' tried to write back to the string, which obviously didn't work for const strings. 'Substring' didn't check for crossed start and end indices. Defines changed to restore the ability to compile under MSVC. Version 1.26 Version 1.26 was never released. I changed a lot of things, in fact too much, even the garbage collector, and hell broke loose. I'll try a more gradual approach next time. Version 1.25 Types have been homogenized to be able to accomodate a different representation. Plus, promises are no longer closures. Unfortunately, I discovered that continuations and force/delay do not pass the SCM test (and never did)... However, on the bright side, what little modifications I did had a large impact on the footprint: USE_NO_FEATURES now produces an object file of 63960 bytes on Linux! Version 1.24 SCM tests now pass again after change in atom2str. Version 1.23 Finally I managed to mess it up with my version control. Version 1.22 actually lacked some of the things I have been fixing in the meantime. This should be considered as a complete replacement for 1.22. Version 1.22 The new ports had a bug in LOAD. MK_CLOSURE is introduced. Shawn Wagner inquired about string->number and number->string. I added string->atom and atom->string and defined the number functions from them. Doing that, I fixed WRITE applied to symbols (it didn't quote them). Unfortunately, minimum build is now slightly larger than 64k... I postpone action because Jason's idea might solve it elegantly. Version 1.21 Jason Felice submitted a radically different datatype representation which he had implemented. While discussing its pros and cons, it became apparent that the current implementation of ports suffered from a grave fault: ports were not garbage-collected. I changed the ports to be heap-allocated, which enabled the use of string ports for loading. Jason also fixed errors in the garbage collection of vectors. USE_VERBATIM is gone. "ssp_compiler.c" has a better solution on HTML generation. A bug involving backslash notation in strings has been fixed. '-c' flag now executes next argument as a stream of Scheme commands. Foreign functions are now also heap allocated, and scheme_define is used to define everything. Version 1.20 Tracing has been added. The toplevel loop has been slightly rearranged. Backquote reading for vector templates has been sanitized. Symbol interning is now correct. Arithmetic functions have been corrected. APPLY, MAP, FOR-EACH, numeric comparison functions fixed. String reader/writer understands \xAA notation. Version 1.19 Carriage Return now delimits identifiers. DOS-formatted Scheme files can be used by Unix. Random number generator added to library. Fixed some glitches of the new type-checking scheme. Fixed erroneous (append '() 'a) behavior. Will continue with r4rstest.scm to fix errors. Version 1.18 The FFI has been extended. USE_VERBOSE_GC has gone. Anyone wanting the same functionality can put (gcverbose #t) in init.scm. print-width was removed, along with three corresponding op-codes. Extended character constants with ASCII names were added. mk_counted_string paves the way for full support of binary strings. As much as possible of the type-checking chores were delegated to the inner loop, thus reducing the code size to less than 4200 loc! Version 1.17 Dynamically-loaded extensions are more fully integrated. TinyScheme is now distributed under the BSD open-source license. Version 1.16 Dynamically-loaded extensions introduced (USE_DL). Santeri Paavolainen found a race condition: When a cons is executed, and each of the two arguments is a constructing function, GC could happen before all arguments are evaluated and cons() is called, and the evaluated arguments would all be reclaimed! Fortunately, such a case was rare in the code, although it is a pitfall in new code and code in foreign functions. Currently, only one such case remains, when COLON_HOOK is defined. Version 1.15 David Gould also contributed some changes that speed up operation. Kirk Zurell fixed HASPROP. The Garbage Collection didn't collect all the garbage...fixed. Version 1.14 Unfortunately, after Andre fixed the GC it became obvious that the algorithm was too slow... Fortunately, David Gould found a way to speed it up. Version 1.13 Silly bug involving division by zero resolved by Roland Kaufman. Macintoch support from Shmulik Regev. Float parser bug fixed by Alexander Shendi. GC bug from Andru Luvisi. Version 1.12 Cis* incorrectly called isalpha() instead of isascii() Added USE_CHAR_CLASSIFIERS, USE_STRING_PORTS. Version 1.11 BSDI defines isnumber... changed all similar functions to is_* EXPT now has correct definition. Added FLOOR,CEILING,TRUNCATE and ROUND, courtesy of Bengt Kleberg. Preprocessor symbols now have values 1 or 0, and can be set as compiler defines (proposed by Andy Ganor *months* ago). 'prompt' and 'InitFile' can now be defined during compilation, too. Version 1.10 Another bug when file ends with comment! Added DEFINE-MACRO in init.scm, courtesy of Andy Gaynor. Version 1.09 Removed bug when READ met EOF. lcm. Version 1.08 quotient,remainder and modulo. gcd. Version 1.07 '=>' in cond now exists list? now checks for circularity some reader bugs removed Reader is more consistent wrt vectors Quote and Quasiquote work with vectors Version 1.06 #! is now skipped generic-assoc bug removed strings are now managed differently, hack.txt is removed various delicate points fixed Version 1.05 Support for scripts, *args*, "-1" option. Various R5RS procedures. *sharp-hook* Handles unmatched parentheses. New architecture for procedures. Version 1.04 Added missing T_ATOM bits... Added vectors Free-list is sorted by address, since vectors need consecutive cells. (quit ) for use with scripts Version 1.03 (26 Aug 1998): Extended .h with useful functions for FFI Library: with-input-* etc. Finished R5RS I/O, added string ports. Version 1.02 (25 Aug 1998): First part of R5RS I/O.