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SCHEME Frequently Asked Questions (FAQ)
Last-Modified: Wed Apr 3 13:52:53 PST 1996
Welcome to the FAQ for SCHEME!
INTRODUCTION
SCHEME is a small part of a much bigger effort called PACT. PACT is
the portable environment and toolkit that we use to create portable
applications, and to create functionality not readily available.
PACT is our environment of choice for handling unique data,
portable computing environments, and the distributed computing
arenas; and for converting data for the visualization application
or algorithm of choice. We have created PACT to shield ourselves
from new software, and hardware so we can concentrate on the
applications at hand. PACT is beginning to emphasize design that
takes advantage of massively parallel environments.
We would like to hear of your experiences with PACT. And, we would
be especially pleased to try to add your mathematical, graphical,
or other functionality to future distributions of PACT.
NOTICE
Absolute portability is our GOAL!
Most of the time we install PACT
without problems, the other times take varying amounts of effort to
track down. Usually the problems are simple, such as missing
headers. If your experience with PACT is not absolute portability,
we would like to hear from you so we can try to make it so. Please
direct all portability issues to:
sabrown@llnl.gov
or minner1@llnl.gov
Thanks to all who have contributed to this FAQ. Corrections and
contributions always welcome. Please e-mail comments, additions,
and corrections to:
rodrigues2@llnl.gov
and use SUBJECT: SCHEME FAQ
Items needing more input from you and others are marked with a ???.
----------------------------------------------------------------------
TABLE OF CONTENTS
----------------------------------------------------------------------
1) What is SCHEME?
2) What is PACT?
3) Where can I get the complete SCHEME source and documentation?
4) ???
----------------------------------------------------------------------
1) What is SCHEME?
SCHEME is an implementation of the Scheme programming language.
The interpreter is implemented as a libary which may be loaded
into applications to provide user extensibility. The interface
between applications and the interpreter is as simple as possible
for ease of use. Garbage collection is done with a reference
counting technique to distribute garbage collection time throughout
a session and eliminate annoying breaks which stop and copy or
mark and sweep are heir to.
It is substantially compliant with the Revised^3 Report on Scheme
standard. Some feature of Revised^4 Report on Scheme standard
have been implemented as well. Deviations and extensions include:
a) Case sensitive identifiers
b) Ignoring the Scheme numerics in favor of C or FORTRAN style
c) Hash table extensions
d) C like string manipulation and I/O functions
2) What is PACT?
PACT stands for Portable Application Code Toolkit. It is a
self-contained set of tools which support developing and
using portable programs particularly scientific and engineering
applications. See the pact.FAQ
3) Where can I get the complete SCHEME source and documentation?
Since SCHEME is an intimate part of PACT, this will get the complete PACT
including SCHEME. You may selectively install SCHEME.
Please use ftp to connect to:
west.llnl.gov
or
134.9.1.5
log in as anonymous, using your email address for the password,
cd pub/pact - to change directory,
binary - to set the transfer mode,
get the three pact files (yy_mm_dd indicates the date):
pact-unix.README
pactyy_mm_dd-doc.tar.gz
pactyy_mm_dd-src
The pact-unix.README file describes the PACT installation process.
4) ???
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