Scheme 9 from Empty Space

S9fES is a mature, portable, and comprehensible interpreter for R4RS Scheme. The core interpreter is written in pure ANSI C (C89), so it runs on all platforms offering a C compiler. It can even be compiled natively on Plan 9. On Unix-based systems (or MinGW), it also offers an interface to common Unix system calls and Curses routines.

The interpreter is built around a toolkit called S9core (PDF), which contains some basic building blocks for dynamic languages, such as a garbage collected heap, bignum arithmetics, etc. (The toolkit is included in the S9fES tarball).

S9fES has been developed using EDOC, a literate programming tool. The rendered EDOC source code to a previous version is available in print and PDF form. The C and Scheme code stripped from the EDOC files is in the public domain, though, and can be downloaded here (~600KB).

The interpreter is explained in detail in the Scheme 9 Book!

The S9fES Distribution Archive

total 1472
-rw-r--r--  1 nmh  nmh    1017 Oct  3   2012 ABOUT
-rw-r--r--  1 nmh  nmh   20714 Jul 14  10:22 CATEGORIES.html
-rw-r--r--  1 nmh  nmh   80123 Jul 14  09:45 CHANGES
-rw-r--r--  1 nmh  nmh    1111 Mar 10  21:00 LICENSE
-rw-r--r--  1 nmh  nmh    8659 Jun 25   2014 MASCOT.png
-rw-r--r--  1 nmh  nmh    7887 Jul 14  09:46 Makefile
-rw-r--r--  1 nmh  nmh    7432 Jul  6  08:56 README
-rw-r--r--  1 nmh  nmh    1519 Jun 15  10:22 README.s9core
-rw-r--r--  1 nmh  nmh      73 Jul 13  11:22 TODO
-rw-r--r--  1 nmh  nmh   13442 Jul 14  10:22 _csums
-rw-r--r--  1 nmh  nmh     624 Mar 31  19:55 config.scm
-rwxr-xr-x  1 nmh  nmh     479 Jun 13  14:31 configure
drwxr-xr-x  2 nmh  nmh     512 Jul 15   2014 contrib
drwxr-xr-x  5 nmh  nmh     512 Jul 12  19:49 ext
drwxr-xr-x  4 nmh  nmh   16384 Jul 12  20:37 help
drwxr-xr-x  2 nmh  nmh    3584 Jul 12  19:17 lib
-rw-r--r--  1 nmh  nmh    1275 Jul 13  20:08 mkfile
drwxr-xr-x  2 nmh  nmh     512 Jul 17   2014 prog
-rw-r--r--  1 nmh  nmh   15961 Jul  6  22:38 s9.1
-rw-r--r--  1 nmh  nmh   18527 Jul  6  22:48 s9.1.txt
-rw-r--r--  1 nmh  nmh   94489 Jul 14  09:46 s9.c
-rw-r--r--  1 nmh  nmh   35597 Jul  6  22:36 s9.scm
-rw-r--r--  1 nmh  nmh  143461 Jul 14  10:22 s9core-20150714.tgz
-rw-r--r--  1 nmh  nmh   59008 Jul  9  12:50 s9core.c
-rw-r--r--  1 nmh  nmh   12754 Jul  9  12:34 s9core.h
-rw-r--r--  1 nmh  nmh  148657 Jul 14  10:22 s9core.pdf
-rw-r--r--  1 nmh  nmh   78823 Jul  9  12:48 s9core.tr
-rw-r--r--  1 nmh  nmh  608898 Jul 14  10:22 s9fes-20150714.tgz
drwxr-xr-x  2 nmh  nmh    1024 Jun 29  13:14 util

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