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"
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COPYRIGHT (c) 1989-92 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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ExternalStream subclass:#NonPositionableExternalStream
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instanceVariableNames:'typeIfStandard'
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classVariableNames:''
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poolDictionaries:''
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category:'Streams-External'
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!
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NonPositionableExternalStream comment:'
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COPYRIGHT (c) 1989-92 by Claus Gittinger
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All Rights Reserved
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this one stands all non-positionable external streams; there are
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terminal streams, pipe streams etc.
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%W% %E%
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'!
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%{
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#include <stdio.h>
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%}
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!NonPositionableExternalStream class methodsFor:'instance creation'!
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forStdin
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^ self basicNew initializeForStdin
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!
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forStdout
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^ self basicNew initializeForStdout
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!
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forStderr
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^ self basicNew initializeForStderr
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! !
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!NonPositionableExternalStream methodsFor:'private'!
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initializeForStdin
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mode := #readonly.
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typeIfStandard := #Stdin.
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%{
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_INST(filePointer) = MKOBJ(stdin);
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%}
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!
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initializeForStdout
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mode := #readwrite.
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unBuffered := true.
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typeIfStandard := #Stdout.
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%{
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_INST(filePointer) = MKOBJ(stdout);
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%}
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!
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initializeForStderr
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mode := #readwrite.
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unBuffered := true.
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typeIfStandard := #Stderr.
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%{
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_INST(filePointer) = MKOBJ(stderr);
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%}
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!
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reOpen
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"if I am one of the standard streams, reopen is easy"
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'reopen NPExtStr' printNewline.
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(typeIfStandard == #Stdin) ifTrue:[
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^ self initializeForStdin
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].
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(typeIfStandard == #Stdout) ifTrue:[
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^ self initializeForStdout
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].
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(typeIfStandard == #Stderr) ifTrue:[
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^ self initializeForStderr
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].
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^ super reOpen
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! !
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!NonPositionableExternalStream methodsFor:'error handling'!
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errorNotPositionable
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^ self error:'positioning not allowd'
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! !
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!NonPositionableExternalStream methodsFor:'positioning'!
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position
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^ 0
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!
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position:anInteger
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self errorNotPositionable
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! !
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