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\documentclass{article}
\usepackage{axiom}
\author{Gabriel Dos~Reis}
\begin{document}
\begin{abstract}
\end{abstract}
\tableofcontents
\eject
\section{The Conduit category}
<<category CONDUIT Conduit>>=
)abbrev category CONDUIT Conduit
++ Author: Gabriel Dos Reis
++ Date Created: August 24, 2008
++ Date Last Modified: August 24, 2008
++ Description:
++ This category is the root of the I/O conduits.
Conduit(): Category == with
close!: % -> %
++ close!(c) closes the conduit c, changing its state to one
++ that is invalid for future read or write operations.
@
\subsection{The InputByteConduit category}
<<category INBCON InputByteConduit>>=
)abbrev category INBCON InputByteConduit
++ Author: Gabriel Dos Reis
++ Date Created: August 24, 2008
++ Date Last Modified: August 24, 2008
++ Description:
++ This category describes input byte stream conduits.
InputByteConduit(): Category == Conduit with
readByteIfCan!: % -> SingleInteger
++ readByteIfCan!(cond) attempts to read a byte from the
++ input conduit `cond'. Returns the read byte if successful,
++ otherwise return -1.
++ Note: Ideally, the return value should have been of type
++ Maybe Byte; but that would have implied allocating
++ a cons cell for every read attempt, which is overkill.
readBytes!: (%,ByteArray) -> SingleInteger
++ readBytes!(c,b) reads byte sequences from conduit `c' into
++ the byte buffer `b'. The actual number of bytes written
++ is returned.
add
readBytes!(cond,ary) ==
count: SingleInteger := 0
b : SingleInteger
while count < #ary and ((b := readByteIfCan! cond) >= 0) repeat
qsetelt!(ary,count,b : Byte)
count := count + 1
count
@
\subsection{The OutputByteConduit category}
<<category OUTBCON OutputByteConduit>>=
)abbrev category OUTBCON OutputByteConduit
++ Author: Gabriel Dos Reis
++ Date Created: August 24, 2008
++ Date Last Modified: August 24, 2008
++ Description:
++ This category describes output byte stream conduits.
OutputByteConduit(): Category == Conduit with
writeByteIfCan!: (%,Byte) -> SingleInteger
++ writeByteIfCan!(c,b) attempts to write the byte `b' on
++ the conduit `c'. Returns the written byte if successful,
++ otherwise, returns -1.
++ Note: Ideally, the return value should have been of type
++ Maybe Byte; but that would have implied allocating
++ a cons cell for every write attempt, which is overkill.
writeBytes!: (%,ByteArray) -> SingleInteger
++ writeBytes!(c,b) write bytes from buffer `b'
++ onto the conduit `c'. The actual number of written
++ bytes is returned.
add
writeBytes!(cond,ary) ==
count: SingleInteger := 0
while count < #ary and
writeByteIfCan!(cond,qelt(ary,count)) >= 0 repeat
count := count + 1
count
@
\subsection{The InputOutputByteConduit category}
<<category IOBCON InputOutputByteConduit>>=
)abbrev category IOBCON InputOutputByteConduit
++ Author: Gabriel Dos Reis
++ Date Created: August 24, 2008
++ Date Last Modified: August 24, 2008
++ See Also: InputByteConduit, OutputByteConduit.
++ Description:
++ This category describes byte stream conduits supporting
++ both input and output operations.
InputOutputByteConduit(): Category ==
Join(InputByteConduit,OutputByteConduit)
@
\section{The Hostname domain}
<<domain HOSTNAME Hostname>>=
)abbrev domain HOSTNAME Hostname
++ Author: Gabriel Dos Reis
++ Date Created: August 23, 2008
++ Date Last Modified: August 23, 2008
++ References: RFC 1034, RFC 1035
++ Description:
++ This domain represents hostnames on computer network.
Hostname(): Public == Private where
Public == Join(SetCategory, CoercibleTo String) with
host: String -> %
++ host(n) constructs a Hostname from the name `n'.
Private == add
Rep == String
host n == per n
x = y == rep x = rep y
coerce(x: %): String == rep x
coerce(x: %): OutputForm == rep(x)::OutputForm
@
\section{The PortNumber domain}
<<domain PORTNUM PortNumber>>=
)abbrev domain PORTNUM PortNumber
++ Author: Gabriel Dos Reis
++ Date Created: August 23, 2008
++ Date Last Modified: August 23, 2008
++ Description:
++ This domain represents network port numbers (notable TCP and UDP).
PortNumber(): Public == Private where
Public == Join(SetCategory,CoercibleTo SingleInteger) with
port: SingleInteger -> %
++ port(n) constructs a PortNumber from the integer `n'.
Private == add
Rep == SingleInteger
port n == per n
x = y == rep x = rep y
coerce(x: %): SingleInteger == rep x
coerce(x: %): OutputForm == rep(x)::OutputForm
@
\section{License}
<<license>>=
-- Copyright (C) 2007-2008, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical Algorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@
<<*>>=
<<license>>
<<category CONDUIT Conduit>>
<<category INBCON InputByteConduit>>
<<category OUTBCON OutputByteConduit>>
<<category IOBCON InputOutputByteConduit>>
<<domain HOSTNAME Hostname>>
<<domain PORTNUM PortNumber>>
@
\end{document}
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