/usr/share/gnu-smalltalk/kernel/RWStream.st is in gnu-smalltalk-common 3.2.4-2.1.
This file is owned by root:root, with mode 0o644.
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| ReadWriteStream Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 1988,92,94,95,99,2000,2001,2006,2007
| Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
WriteStream subclass: ReadWriteStream [
<category: 'Streams-Collections'>
<comment: 'I am the class of streams that may be read and written from simultaneously.
In some sense, I am the best of both ReadStream and WriteStream.'>
ReadWriteStream class >> on: aCollection [
"Answer a new stream working on aCollection from its start. The
stream starts at the front of aCollection."
<category: 'instance creation'>
^(super on: aCollection)
beReadWrite;
limit: aCollection size
]
ReadWriteStream class >> on: aCollection from: firstIndex to: lastIndex [
"Answer an instance of the receiver streaming from
the firstIndex-th item of aCollection to the lastIndex-th"
<category: 'instance creation'>
firstIndex = 1
ifFalse:
[^super
on: aCollection
from: firstIndex
to: lastIndex].
lastIndex > aCollection size
ifTrue:
[^SystemExceptions.IndexOutOfRange signalOn: self withIndex: lastIndex].
^(super on: aCollection)
beReadWrite;
limit: lastIndex
]
ReadWriteStream class >> with: aCollection [
"Answer a new instance of the receiver which streams from the end
of aCollection."
<category: 'instance creation'>
^(super with: aCollection) beReadWrite
]
contents [
"Unlike WriteStreams, ReadWriteStreams return the whole contents of the
underlying collection."
<category: 'positioning'>
^collection copyFrom: 1 to: endPtr
]
limit: anInteger [
"Private - Makes sure that the contents message to this object
returns anInteger objects, not just what has been written
so far."
<category: 'private'>
endPtr := collection size
]
]
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