author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Fri, 06 Jan 2012 08:53:28 +0000 | |
branch | jv |
changeset 17909 | 0ab1deab8e9c |
parent 17892 | d86c8bd5ece3 |
child 17910 | 8d796ca8bd1d |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1999 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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"{ Package: 'stx:libbasic' }" |
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Stream subclass:#HashStream |
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instanceVariableNames:'' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'System-Crypt-Hashing' |
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! |
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!HashStream class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1999 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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Abstract class. Subclasses generate hash values used as checksums |
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or for generating cryptographic signatures. |
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[author:] |
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Stefan Vogel |
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[see also:] |
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SHA1Stream MD5Stream |
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" |
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! ! |
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!HashStream class methodsFor:'instance creation'! |
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new |
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"have to re-allow new - it was disabled in Stream" |
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^ self basicNew initialize |
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! |
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random |
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"create a random number generator using myself" |
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^ HashRandom with:self |
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" |
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SHA1Stream random next |
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"Modified: / 12.11.1999 / 17:21:17 / stefan" |
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! ! |
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!HashStream class methodsFor:'compatibility - squeak'! |
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hashMessage:aStringOrByteArrayOrStream |
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"SQUEAK compatibility |
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- but this is a bad choice - squeak uses #digestMessage: at the instance side" |
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^ self hashValueOf:aStringOrByteArrayOrStream |
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! ! |
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!HashStream class methodsFor:'queries'! |
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canStream |
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"simple hash functions (squeak-ported) cannot stream. |
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Use hashFunction: there" |
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^ true |
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hashSize |
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self subclassResponsibility |
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"Created: / 04-01-2012 / 19:22:32 / cg" |
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! ! |
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!HashStream class methodsFor:'self tests'! |
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test |
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"test against testVector" |
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self testVector do:[:pair | |
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|data expectedHash expectedHashBytes hashStream| |
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data := pair first. |
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expectedHash := pair second. |
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expectedHash isString ifTrue:[ |
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expectedHashBytes := ByteArray fromHexString:expectedHash |
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] ifFalse:[ |
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expectedHashBytes := expectedHash |
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]. |
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"/ non-stream interface must be implemented by all |
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self assert:(self hashValueOf:data) = expectedHashBytes message:'Test failed'. |
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self canStream ifTrue:[ |
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hashStream := self new. |
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hashStream nextPut:data. |
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self assert:hashStream hashValue = expectedHashBytes message:'Test failed' |
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]. |
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]. |
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" |
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MD5Stream test. |
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SHA1Stream test. |
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RipeMD160Stream test. |
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" |
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! |
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testVector |
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"define a testvector to test the implementation" |
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^ self subclassResponsibility |
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! ! |
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!HashStream class methodsFor:'utilities'! |
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digestMessage:aStringOrByteArrayOrStream |
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^ self hashValueOf:aStringOrByteArrayOrStream |
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! |
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hashValueOf:aStringOrByteArrayOrStream |
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|hashStream| |
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hashStream := self new. |
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aStringOrByteArrayOrStream readStream copyToEndInto:hashStream. |
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^ hashStream hashValue |
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MD5Stream hashValueOf:'BlaBlaBla' |
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MD5Stream hashValueOf:('makefile' asFilename readStream) |
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MD5Stream hashValueOf:('BlaBlaBla' readStream) |
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hashValueOfFile:aFilename |
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|hash| |
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aFilename asFilename readingFileDo:[:readStream| |
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readStream binary. |
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hash := self hashValueOf:readStream. |
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]. |
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^ hash |
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MD5Stream hashValueOfFile:'makefile' |
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! ! |
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!HashStream methodsFor:'accessing'! |
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contents |
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"return the entire contents of the stream |
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- this is our hashValue." |
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^ self hashValue |
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"Created: / 17.3.1999 / 15:10:03 / stefan" |
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! ! |
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!HashStream methodsFor:'not implemented'! |
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next |
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^ self shouldNotImplement |
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"Created: / 17.3.1999 / 15:11:03 / stefan" |
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! ! |
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!HashStream methodsFor:'operations'! |
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digestMessage:bytes |
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"answer the digest of bytes" |
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self reset. |
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self nextPutAll:bytes. |
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^ self contents. |
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" |
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SHA1Stream new |
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digestMessage:'123456789abcdefg'; |
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digestMessage:'123456789abcdefg' |
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(SHA1Stream new hmac key:'123456') |
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digestMessage:'123456789abcdefg'; |
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digestMessage:'123456789abcdefg' |
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(SHA1Stream new hmac key:'123456') |
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nextPutAll:'123456789abcdefg'; |
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contents |
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" |
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! |
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hmac |
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"answer a hmac stream with myself" |
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^ HmacStream on:self |
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" |
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(SHA1Stream new hmac key:'exampleKey') digestMessage:'message to generate MAC of' |
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" |
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! |
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reset |
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"initialize to a clean state" |
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^ self subclassResponsibility |
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! ! |
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!HashStream methodsFor:'queries'! |
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blockSize |
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"the class knows about the basic block size" |
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^ self class blockSize |
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"Created: / 18.3.1999 / 10:17:02 / stefan" |
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! |
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hashSize |
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"the class knows about the basic hash size" |
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^ self class hashSize |
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"Created: / 18.3.1999 / 10:17:12 / stefan" |
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"Modified: / 15.10.1999 / 11:53:20 / stefan" |
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! |
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hashValue |
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"retunr the value of the computeted hash" |
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^ self subclassResponsibility |
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! |
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isReadable |
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"return true, if reading is supported by the recevier. |
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Always return false here" |
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^ false |
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"Modified: / 17.3.1999 / 15:06:09 / stefan" |
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! |
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isWritable |
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"return true, if writing is supported by the recevier. |
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Always return true here" |
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^ true |
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"Created: / 17.3.1999 / 15:05:49 / stefan" |
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! ! |
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!HashStream methodsFor:'testing'! |
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atEnd |
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"return true if the end of the stream has been reached; |
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this is never reached" |
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^ false |
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"Created: / 17.3.1999 / 15:08:55 / stefan" |
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! ! |
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283 |
!HashStream methodsFor:'writing'! |
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nextPut:anObject |
286 |
"add the hash of anObject to the computed hash so far. |
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287 |
anObject can be a Character, SmallInteger, or Character-, Byte- |
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288 |
Integer-Array" |
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289 |
||
290 |
^ self subclassResponsibility |
|
291 |
! |
|
292 |
||
6864 | 293 |
nextPutAll:aCollection |
294 |
"Hash streams handle Strings and ByteArrays in nextPut:" |
|
295 |
||
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|
296 |
aCollection isByteCollection ifTrue:[ |
6864 | 297 |
self nextPut:aCollection. |
298 |
] ifFalse:[ |
|
299 |
super nextPutAll:aCollection |
|
300 |
]. |
|
301 |
||
302 |
"Created: / 14.10.1999 / 11:22:50 / stefan" |
|
7042 | 303 |
! |
304 |
||
305 |
nextPutBytes:count from:anObject startingAt:start |
|
306 |
"write count bytes from an object starting at index start. |
|
307 |
Return the number of bytes written. |
|
308 |
The object must have non-pointer indexed instvars |
|
309 |
(i.e. be a ByteArray, String, Float- or DoubleArray). |
|
310 |
Use with care - non object oriented i/o. |
|
311 |
This is provided for compatibility with externalStream; |
|
312 |
to support binary storage. |
|
313 |
||
7251 | 314 |
Redefined, because HashStream encodes integers as 4 bytes. |
7042 | 315 |
You should implement this method in subclasses" |
316 |
||
317 |
|idx| |
|
318 |
||
319 |
"self subclassResponsibility" |
|
320 |
||
321 |
idx := start. |
|
322 |
1 to:count do:[:i | |
|
323 |
self nextPut:(anObject byteAt:idx) asCharacter. |
|
324 |
idx := idx + 1 |
|
325 |
]. |
|
326 |
^ count |
|
6864 | 327 |
! ! |
328 |
||
329 |
!HashStream class methodsFor:'documentation'! |
|
330 |
||
331 |
version |
|
17909 | 332 |
^ '$Header: /cvs/stx/stx/libbasic/HashStream.st,v 1.15 2012/01/04 18:55:36 cg Exp $' |
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trunk merged into jv branch
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parents:
17728
diff
changeset
|
333 |
! |
a1892eeca6c0
trunk merged into jv branch
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17728
diff
changeset
|
334 |
|
a1892eeca6c0
trunk merged into jv branch
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parents:
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diff
changeset
|
335 |
version_CVS |
17909 | 336 |
^ 'Header: /cvs/stx/stx/libbasic/HashStream.st,v 1.15 2012/01/04 18:55:36 cg Exp ' |
17865 | 337 |
! |
338 |
||
339 |
version_SVN |
|
17909 | 340 |
^ '$Id: HashStream.st 10754 2012-01-06 08:53:28Z vranyj1 $' |
17846 | 341 |
! ! |
17892 | 342 |
|
17909 | 343 |