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COPYRIGHT (c) 1996 by eXept Software AG
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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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FilteringStream subclass:#LineNumberReadStream
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instanceVariableNames:'lineNumber'
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classVariableNames:''
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poolDictionaries:''
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category:'Streams-Misc'
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!
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!LineNumberReadStream class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1996 by eXept Software AG
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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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!
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documentation
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"
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This filter keeps track of the current line, while
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passing text from its inputStream to its outputStream.
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Can be placed in-between text processing and the texts
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input stream, and let it keep track of the lineNumber.
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[see also:]
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ReadStream WriteStream ExternalStream FileStream
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FilteringStream FilteringLineStream
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[author:]
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Claus Gittinger
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"
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!
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examples
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"
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count lines in a Makefile:
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[exBegin]
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|in filter|
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in := 'Makefile' asFilename readStream.
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filter := LineNumberReadStream readingFrom:in.
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filter upToEnd.
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filter close.
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Transcript showCR:('Makefile has %1 lines' bindWith:(filter lineNumber - 1)).
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[exEnd]
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find a specific string and output its lineNr:
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[exBegin]
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|in filter|
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in := 'Makefile' asFilename readStream.
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filter := LineNumberReadStream readingFrom:in.
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filter skipThroughAll:'start of'.
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filter close.
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Transcript showCR:('found in line %1' bindWith:(filter lineNumber)).
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[exEnd]
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"
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! !
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!LineNumberReadStream methodsFor:'accessing'!
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lineNumber
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"return the current lineNumber"
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^ lineNumber
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"Created: 11.1.1997 / 16:57:10 / cg"
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"Modified: 11.1.1997 / 16:57:19 / cg"
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!
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lineNumber:something
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"set the current lineNumber"
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lineNumber := something.
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"Created: 11.1.1997 / 16:57:10 / cg"
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"Modified: 11.1.1997 / 16:57:22 / cg"
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! !
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!LineNumberReadStream methodsFor:'initialization'!
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initialize
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super initialize.
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lineNumber := 1.
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filter := [:char |
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char == Character cr ifTrue:[
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lineNumber := lineNumber + 1.
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].
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char
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].
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"Modified: 11.1.1997 / 16:58:42 / cg"
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! !
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!LineNumberReadStream class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libbasic2/LineNumberReadStream.st,v 1.1 1997-01-11 18:54:37 cg Exp $'
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! !
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