author | Claus Gittinger <cg@exept.de> |
Wed, 02 Jul 1997 17:18:41 +0200 | |
changeset 2745 | bdf76e380d27 |
parent 2458 | 4f29a9dd12fe |
child 2793 | e40dedf51177 |
permissions | -rw-r--r-- |
1 | 1 |
" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
159 | 3 |
All Rights Reserved |
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|
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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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Number subclass:#Integer |
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instanceVariableNames:'' |
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classVariableNames:'DefaultDisplayRadix' |
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poolDictionaries:'' |
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category:'Magnitude-Numbers' |
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! |
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!Integer class methodsFor:'documentation'! |
88 | 21 |
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copyright |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
|
159 | 25 |
All Rights Reserved |
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|
88 | 27 |
This software is furnished under a license and may be used |
28 |
only in accordance with the terms of that license and with the |
|
29 |
inclusion of the above copyright notice. This software may not |
|
30 |
be provided or otherwise made available to, or used by, any |
|
31 |
other person. No title to or ownership of the software is |
|
32 |
hereby transferred. |
|
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" |
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! |
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documentation |
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" |
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abstract superclass for all integer numbers. |
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See details in concrete subclasses LargeInteger and SmallInteger. |
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212 | 40 |
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1892 | 41 |
Mixed mode arithmetic: |
42 |
int op int -> int |
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int op fix -> fix; scale is fix's scale |
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int op fraction -> fraction |
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int op float -> float |
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||
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[Class variables:] |
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1295 | 49 |
DefaultDisplayRadix the radix in which integers present their |
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displayString (which is used in inspectors) |
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If you are to look at many hex numbers, bitmasks |
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etc. you may set this to 2 or 16. |
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(avoids typing printStringRadix:.. all the time |
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- I know - I am lazy ;-). Default is 10. |
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212 | 55 |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Number |
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LargeInteger SmallInteger |
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1893 | 63 |
Float ShortFloat Fraction FixedPoint |
88 | 64 |
" |
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! ! |
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1 | 66 |
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parents:
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diff
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!Integer class methodsFor:'instance creation'! |
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new:numberOfBytes neg:negative |
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"for ST-80 compatibility: |
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Return an empty Integer (uninitialized value) with space for |
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numberOfBytes bytes (= digitLength). The additional argument |
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132 | 73 |
negative specifies if the result should be a negative number. |
74 |
The digits can be stored byte-wise into the result, using digitAt:put:" |
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|
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^ (LargeInteger basicNew numberOfDigits:numberOfBytes) |
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sign:(negative ifTrue:[-1] ifFalse:[1]) |
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! |
79 |
||
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readFrom:aStringOrStream |
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"return the next unsigned Integer from the (character-)stream aStream |
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as decimal number. |
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||
84 |
NOTICE: |
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This behaves different from the default readFrom:, in returning |
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0 (instead of raising an error) in case no number can be read. |
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It is unclear, if this is the correct behavior (ST-80 does this) |
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- depending on the upcoming ANSI standard, this may change." |
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||
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^ self readFrom:aStringOrStream onError:0 |
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" |
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Integer readFrom:(ReadStream on:'foobar') |
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Integer readFrom:(ReadStream on:'foobar') onError:nil |
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" |
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! |
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||
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readFrom:aStringOrStream onError:exceptionBlock |
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"return the next Integer from the (character-)stream aStream, |
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handling initial XXr for arbitrary radix numbers and initial sign. |
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Also, all initial whitespace is skipped. |
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If the string does not represent a valid integer number, |
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return the value of exceptionBlock." |
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ErrorSignal handle:[:ex | |
106 |
^ exceptionBlock value |
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] do:[ |
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|str nextChar value negative| |
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str := aStringOrStream readStream. |
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nextChar := str skipSeparators. |
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(nextChar == $-) ifTrue:[ |
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negative := true. |
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nextChar := str nextPeek |
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] ifFalse:[ |
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negative := false |
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]. |
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(nextChar isNil or:[nextChar isDigit not]) ifTrue:[ |
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" |
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the string does not represent an integer |
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" |
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^ exceptionBlock value |
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]. |
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value := self readFrom:str radix:10 onError:[^ exceptionBlock value]. |
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nextChar := str peek. |
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((nextChar == $r) or:[ nextChar == $R]) ifTrue:[ |
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"-xxr<number> is invalid; should be xxr-<val>" |
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||
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negative ifTrue:[ |
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131 |
'Integer [warning]: invalid (negative) radix ignored' errorPrintCR. |
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negative := false |
133 |
]. |
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str next. |
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value := self readFrom:str radix:value onError:[^ exceptionBlock value] |
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]. |
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negative ifTrue:[ |
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^ value negated |
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]. |
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^ value |
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]. |
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" |
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Integer readFrom:'12345' |
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Integer readFrom:'-12345' |
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Integer readFrom:'+12345' |
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Integer readFrom:'16rFFFF' |
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Integer readFrom:'12345.1234' |
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Integer readFrom:'foo' |
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Integer readFrom:'foo' onError:[0] |
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" |
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||
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"Created: 16.11.1995 / 22:48:59 / cg" |
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1976
diff
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"Modified: 10.1.1997 / 17:54:30 / cg" |
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! |
156 |
||
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readFrom:aStringOrStream radix:radix |
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"return the next unsigned Integer from the (character-)stream aStream |
|
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in radix; (assumes that the initial XXr has already been read). |
|
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No whitespace-skipping is done. |
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Returns 0 if no number available. |
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||
163 |
NOTICE: |
|
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This behaves different from the default readFrom:, in returning |
|
165 |
0 (instead of raising an error) in case no number can be read. |
|
166 |
It is unclear, if this is the correct behavior (ST-80 does this) |
|
167 |
- depending on the upcoming ANSI standard, this may change." |
|
168 |
||
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^ self readFrom:aStringOrStream radix:radix onError:0 |
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! |
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||
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readFrom:aStringOrStream radix:radix onError:exceptionBlock |
|
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"return the next unsigned Integer from the (character-)stream aStream |
|
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in radix; (assumes that the initial XXr has already been read). |
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No whitespace-skipping is done. |
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Returns the value of exceptionBlock, if no number is available." |
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||
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|str nextChar value| |
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str := aStringOrStream readStream. |
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nextChar := str peek. |
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(nextChar notNil and:[nextChar isDigitRadix:radix]) ifFalse:[ |
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^ exceptionBlock value |
|
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]. |
|
186 |
||
187 |
value := nextChar digitValue. |
|
188 |
nextChar := str nextPeek. |
|
189 |
[nextChar notNil and:[nextChar isDigitRadix:radix]] whileTrue:[ |
|
190 |
value := value * radix + nextChar digitValue. |
|
191 |
nextChar := str nextPeek |
|
192 |
]. |
|
193 |
^ value |
|
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||
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" |
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196 |
Integer readFrom:(ReadStream on:'12345') radix:10 |
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Integer readFrom:(ReadStream on:'FFFF') radix:16 |
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Integer readFrom:(ReadStream on:'1010') radix:2 |
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Integer readFrom:(ReadStream on:'foobar') radix:10 |
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Integer readFrom:(ReadStream on:'foobar') radix:10 onError:nil |
|
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" |
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! ! |
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203 |
||
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
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204 |
!Integer class methodsFor:'constants'! |
701 | 205 |
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206 |
unity |
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1555 | 207 |
"return the neutral element for multiplication (1)" |
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^ 1 |
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"Modified: 18.7.1996 / 12:26:43 / cg" |
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! |
213 |
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214 |
zero |
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1555 | 215 |
"return the neutral element for addition (0)" |
701 | 216 |
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^ 0 |
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1555 | 218 |
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"Modified: 18.7.1996 / 12:26:38 / cg" |
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! ! |
221 |
||
1842
b28609c73839
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Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
222 |
!Integer class methodsFor:'misc'! |
49 | 223 |
|
224 |
displayRadix:aNumber |
|
54 | 225 |
"being tired of always sending #printStringRadix: in the inspectors, |
49 | 226 |
this allows you to change the default print radix for the displayString |
227 |
method." |
|
228 |
||
229 |
DefaultDisplayRadix := aNumber |
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231 |
" |
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232 |
Integer displayRadix:16. 123456 inspect |
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Integer displayRadix:10. 123456 inspect |
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" |
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! ! |
236 |
||
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!Integer methodsFor:'VisualAge compatibility'! |
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parents:
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<< aNumber |
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diff
changeset
|
240 |
"left shift" |
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parents:
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diff
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241 |
|
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parents:
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diff
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|
242 |
^ self bitShift:aNumber |
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parents:
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diff
changeset
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243 |
|
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diff
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244 |
" |
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parents:
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diff
changeset
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245 |
1 << 5 |
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parents:
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diff
changeset
|
246 |
64 << -5 |
8d8edf9df0ae
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parents:
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diff
changeset
|
247 |
" |
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parents:
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diff
changeset
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248 |
! |
8d8edf9df0ae
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parents:
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diff
changeset
|
249 |
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parents:
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diff
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|
250 |
>> aNumber |
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parents:
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diff
changeset
|
251 |
"right shift" |
8d8edf9df0ae
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parents:
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diff
changeset
|
252 |
|
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parents:
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diff
changeset
|
253 |
^ self bitShift:(aNumber negated) |
8d8edf9df0ae
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parents:
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diff
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|
254 |
|
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parents:
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|
255 |
" |
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parents:
701
diff
changeset
|
256 |
1 >> -5 |
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parents:
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diff
changeset
|
257 |
64 >> 5 |
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parents:
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diff
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|
258 |
" |
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parents:
701
diff
changeset
|
259 |
! |
8d8edf9df0ae
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parents:
701
diff
changeset
|
260 |
|
1210 | 261 |
clearBit:index |
262 |
"return a new number where the specified bit is off. |
|
263 |
Bits are counted from 1 starting with the least significant." |
|
264 |
||
265 |
^ self bitAnd:(1 bitShift:index-1) bitInvert |
|
266 |
||
267 |
" |
|
268 |
5 clearBit:3 => 1 |
|
269 |
16rFFFF clearBit:16 => 32767 (16r7FFF) |
|
270 |
16rFFFF clearBit:1 => 65534 (16rFFFE) |
|
271 |
" |
|
272 |
! |
|
273 |
||
927
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fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
274 |
isBitSet:index |
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parents:
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diff
changeset
|
275 |
"return true if the index' bit is set; false otherwise. |
8d8edf9df0ae
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parents:
701
diff
changeset
|
276 |
Bits are counted from 1 starting with the least significant." |
8d8edf9df0ae
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parents:
701
diff
changeset
|
277 |
|
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parents:
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diff
changeset
|
278 |
^ (self bitAt:index) ~~ 0 |
1 | 279 |
|
927
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parents:
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diff
changeset
|
280 |
" |
8d8edf9df0ae
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Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
281 |
5 isBitSet:3 => true |
8d8edf9df0ae
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Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
282 |
2r0101 isBitSet:2 => false |
8d8edf9df0ae
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Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
283 |
2r0101 isBitSet:1 => true |
8d8edf9df0ae
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parents:
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diff
changeset
|
284 |
2r0101 isBitSet:0 index error |
8d8edf9df0ae
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parents:
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diff
changeset
|
285 |
" |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
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parents:
701
diff
changeset
|
286 |
! |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
287 |
|
8d8edf9df0ae
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parents:
701
diff
changeset
|
288 |
setBit:index |
8d8edf9df0ae
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Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
289 |
"return a new number where the specified bit is on. |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
290 |
Bits are counted from 1 starting with the least significant." |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
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parents:
701
diff
changeset
|
291 |
|
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parents:
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diff
changeset
|
292 |
^ self bitOr:(1 bitShift:index-1) |
1 | 293 |
|
927
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parents:
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diff
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|
294 |
" |
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parents:
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diff
changeset
|
295 |
0 setBit:3 => 4 (2r100) |
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parents:
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changeset
|
296 |
0 setBit:48 => 140737488355328 (2r1000.....000) |
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parents:
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diff
changeset
|
297 |
((0 setBit:99) setBit:100) printStringRadix:2 |
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|
298 |
" |
1 | 299 |
! ! |
300 |
||
69 | 301 |
!Integer methodsFor:'bit operators'! |
302 |
||
303 |
bitAnd:anInteger |
|
357 | 304 |
"return the bitwise-and of the receiver and the argument, anInteger. |
305 |
This is a general and slow implementation, walking over the bytes of |
|
306 |
the receiver and the argument." |
|
69 | 307 |
|
927
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parents:
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diff
changeset
|
308 |
|n "{ Class: SmallInteger }" |
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parents:
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diff
changeset
|
309 |
result byte| |
69 | 310 |
|
92 | 311 |
n := (anInteger digitLength) min:(self digitLength). |
312 |
result := self class basicNew numberOfDigits:n. |
|
69 | 313 |
|
314 |
1 to:n do:[:index | |
|
1883
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renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
315 |
byte := (anInteger digitAt:index) bitAnd:(self digitAt:index). |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
316 |
result digitAt:index put:byte. |
69 | 317 |
]. |
357 | 318 |
(byte == 0 or:[n < 5]) ifTrue:[ |
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
319 |
^ result compressed |
92 | 320 |
]. |
321 |
^ result |
|
357 | 322 |
|
323 |
" |
|
324 |
(16r112233445566778899 bitAnd:16rFF ) printStringRadix:16 |
|
325 |
(16r112233445566778899 bitAnd:16rFFFFFFFFFFFFFFFF00) printStringRadix:16 |
|
326 |
(16r112233445566778899 bitAnd:16rFF0000000000000000) printStringRadix:16 |
|
327 |
(16r112233445566778899 bitAnd:16r00000000000000FFFF) printStringRadix:16 |
|
328 |
" |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
329 |
|
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renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
330 |
"Modified: 5.11.1996 / 14:06:26 / cg" |
69 | 331 |
! |
332 |
||
85 | 333 |
bitAt:index |
92 | 334 |
"return the value of the index's bit (index starts at 1). |
335 |
Notice: the result of bitShift: on negative receivers is not |
|
159 | 336 |
defined in the language standard (since the implementation |
337 |
is free to choose any internal representation for integers)" |
|
85 | 338 |
|
339 |
|i "{Class: SmallInteger}"| |
|
340 |
||
341 |
i := index - 1. |
|
342 |
^ (self digitAt:(i // 8 + 1)) bitAt:(i \\ 8 + 1) |
|
92 | 343 |
|
344 |
" |
|
927
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
345 |
1 bitAt:1 => 1 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
346 |
1 bitAt:2 => 0 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
347 |
1 bitAt:0 index error |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
348 |
2r1000100010001000100010001000100010001000100010001000 bitAt:48 => 1 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
349 |
2r1000100010001000100010001000100010001000100010001000 bitAt:47 => 0 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
350 |
|
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
351 |
(1 bitShift:1000) bitAt:1000 => 0 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
352 |
(1 bitShift:1000) bitAt:1001 => 1 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
353 |
(1 bitShift:1000) bitAt:1002 => 0 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
354 |
|
92 | 355 |
(1 bitShift:30) bitAt:30 |
356 |
(1 bitShift:30) bitAt:31 |
|
927
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
357 |
(1 bitShift:30) bitAt:32 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
358 |
(1 bitShift:31) bitAt:31 |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
359 |
(1 bitShift:31) bitAt:32 |
92 | 360 |
(1 bitShift:31) bitAt:33 |
361 |
(1 bitShift:32) bitAt:32 |
|
362 |
(1 bitShift:32) bitAt:33 |
|
363 |
(1 bitShift:32) bitAt:34 |
|
364 |
(1 bitShift:64) bitAt:64 |
|
365 |
(1 bitShift:64) bitAt:65 |
|
366 |
(1 bitShift:64) bitAt:66 |
|
367 |
" |
|
85 | 368 |
! |
369 |
||
701 | 370 |
bitOr:anInteger |
371 |
"return the bitwise-or of the receiver and the argument, anInteger. |
|
372 |
This is a general and slow implementation, walking over the bytes of |
|
373 |
the receiver and the argument." |
|
374 |
||
927
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
375 |
|n "{ Class: SmallInteger }" |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
376 |
result byte| |
701 | 377 |
|
378 |
n := (anInteger digitLength) max:(self digitLength). |
|
379 |
result := self class basicNew numberOfDigits:n. |
|
380 |
||
381 |
1 to:n do:[:index | |
|
382 |
byte := (anInteger digitAt:index) bitOr:(self digitAt:index). |
|
383 |
result digitAt:index put:byte. |
|
384 |
]. |
|
385 |
"/ no need to normalize - if the operands were correct |
|
386 |
"/ byte == 0 ifTrue:[ |
|
387 |
"/ ^ result normalize |
|
388 |
"/ ]. |
|
389 |
^ result |
|
390 |
! |
|
391 |
||
85 | 392 |
bitShift:shiftCount |
393 |
"return the value of the receiver shifted by shiftCount bits; |
|
394 |
leftShift if shiftCount > 0; rightShift otherwise. |
|
92 | 395 |
|
396 |
Notice: the result of bitShift: on negative receivers is not |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
397 |
defined in the language standard (since the implementation |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
398 |
is free to choose any internal representation for integers)" |
85 | 399 |
|
92 | 400 |
|result |
401 |
prev "{ Class: SmallInteger }" |
|
402 |
next "{ Class: SmallInteger }" |
|
403 |
byte "{ Class: SmallInteger }" |
|
359 | 404 |
byte2 "{ Class: SmallInteger }" |
92 | 405 |
bitShift "{ Class: SmallInteger }" |
406 |
revShift "{ Class: SmallInteger }" |
|
407 |
digitShift "{ Class: SmallInteger }" |
|
408 |
n "{ Class: SmallInteger }" |
|
409 |
nn "{ Class: SmallInteger }"| |
|
85 | 410 |
|
411 |
shiftCount > 0 ifTrue:[ |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
412 |
"left shift" |
85 | 413 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
414 |
digitShift := shiftCount // 8. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
415 |
bitShift := shiftCount \\ 8. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
416 |
n := self digitLength. |
92 | 417 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
418 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
419 |
modulu 8 shifts can be done faster ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
420 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
421 |
bitShift == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
422 |
result := self class basicNew numberOfDigits:n + digitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
423 |
result sign:self sign. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
424 |
result digits replaceFrom:(digitShift + 1) with:self digits. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
425 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
426 |
no normalize needed, since receiver was already normalized |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
427 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
428 |
^ result |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
429 |
]. |
92 | 430 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
431 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
432 |
less-than-8 shifts can be done faster ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
433 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
434 |
digitShift == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
435 |
n := n + 1. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
436 |
result := self class basicNew numberOfDigits:n. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
437 |
result sign:self sign. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
438 |
prev := 0. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
439 |
1 to:n-1 do:[:index | |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
440 |
byte := self digitAt:index. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
441 |
byte := (byte bitShift:bitShift) bitOr:prev. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
442 |
result digitAt:index put:(byte bitAnd:16rFF). |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
443 |
prev := byte bitShift:-8. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
444 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
445 |
result digitAt:n put:prev. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
446 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
447 |
might have stored a 0-byte ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
448 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
449 |
prev == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
450 |
^ result compressed |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
451 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
452 |
^ result. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
453 |
]. |
92 | 454 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
455 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
456 |
slow case ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
457 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
458 |
n := n + digitShift + 1. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
459 |
result := self class basicNew numberOfDigits:n. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
460 |
result sign:self sign. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
461 |
byte := self digitAt:1. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
462 |
byte := (byte bitShift:bitShift) bitAnd:16rFF. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
463 |
result digitAt:(digitShift + 1) put:byte. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
464 |
revShift := -8 + bitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
465 |
2 to:(self digitLength) do:[:index | |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
466 |
byte := self digitAt:index. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
467 |
byte2 := self digitAt:index-1. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
468 |
byte := byte bitShift:bitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
469 |
byte2 := byte2 bitShift:revShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
470 |
byte := byte bitOr:byte2. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
471 |
byte := byte bitAnd:16rFF. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
472 |
result digitAt:(index + digitShift) put:byte. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
473 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
474 |
byte2 := self digitAt:self digitLength. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
475 |
byte2 := byte2 bitShift:revShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
476 |
byte2 := byte2 bitAnd:16rFF. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
477 |
result digitAt:(self digitLength + digitShift + 1) put:byte2. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
478 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
479 |
might have stored a 0-byte ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
480 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
481 |
byte2 == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
482 |
^ result compressed |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
483 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
484 |
^ result |
92 | 485 |
]. |
486 |
||
487 |
shiftCount < 0 ifTrue:[ |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
488 |
"right shift" |
85 | 489 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
490 |
digitShift := shiftCount negated // 8. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
491 |
bitShift := shiftCount negated \\ 8. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
492 |
n := self digitLength. |
92 | 493 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
494 |
digitShift >= n ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
495 |
^ 0 |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
496 |
]. |
92 | 497 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
498 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
499 |
modulu 8 shifts can be done faster ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
500 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
501 |
bitShift == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
502 |
n := n-digitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
503 |
result := self class basicNew numberOfDigits:n. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
504 |
result sign:self sign. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
505 |
result digits replaceFrom:1 with:self digits startingAt:(digitShift + 1) . |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
506 |
n <= 4 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
507 |
^ result compressed |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
508 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
509 |
^ result |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
510 |
]. |
85 | 511 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
512 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
513 |
less-than-8 shifts can be done faster ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
514 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
515 |
digitShift == 0 ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
516 |
result := self class basicNew numberOfDigits:n. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
517 |
result sign:self sign. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
518 |
prev := 0. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
519 |
bitShift := bitShift negated. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
520 |
revShift := 8 + bitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
521 |
n to:1 by:-1 do:[:index | |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
522 |
byte := self digitAt:index. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
523 |
next := (byte bitShift:revShift) bitAnd:16rFF. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
524 |
byte := (byte bitShift:bitShift) bitOr:prev. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
525 |
result digitAt:index put:(byte bitAnd:16rFF). |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
526 |
prev := next. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
527 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
528 |
(n <= 5) ifTrue:[ |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
529 |
^ result compressed |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
530 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
531 |
^ result |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
532 |
]. |
92 | 533 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
534 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
535 |
slow case ... |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
536 |
" |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
537 |
nn := n-digitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
538 |
result := self class basicNew numberOfDigits:nn. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
539 |
result sign:self sign. |
85 | 540 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
541 |
prev := 0. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
542 |
bitShift := bitShift negated. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
543 |
revShift := 8 + bitShift. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
544 |
n to:(1 + digitShift) by:-1 do:[:index | |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
545 |
byte := self digitAt:index. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
546 |
next := (byte bitShift:revShift) bitAnd:16rFF. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
547 |
byte := (byte bitShift:bitShift) bitOr:prev. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
548 |
result digitAt:(index - digitShift) put:byte. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
549 |
prev := next. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
550 |
]. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
551 |
"the last stored byte ..." |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
552 |
^ result compressed |
85 | 553 |
]. |
92 | 554 |
|
555 |
^ self "no shift" |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
556 |
|
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
557 |
"Modified: 5.11.1996 / 14:06:37 / cg" |
701 | 558 |
! |
1 | 559 |
|
1407
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
560 |
bitTest:anInteger |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
561 |
"return true, if the bitwise-and of the receiver and the argument, anInteger |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
562 |
is non-0, false otherwise. |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
563 |
This is a general and slow implementation, walking over the bytes of |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
564 |
the receiver and the argument." |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
565 |
|
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
566 |
|n "{ Class: SmallInteger }" |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
567 |
result byte| |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
568 |
|
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
569 |
n := (anInteger digitLength) min:(self digitLength). |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
570 |
result := self class basicNew numberOfDigits:n. |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
571 |
|
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
572 |
1 to:n do:[:index | |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
573 |
byte := (anInteger digitAt:index) bitAnd:(self digitAt:index). |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
574 |
byte ~~ 0 ifTrue:[^ true]. |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
575 |
]. |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
576 |
^ false |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
577 |
|
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
578 |
" |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
579 |
16r112233445566778899 bitTest:16rFF |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
580 |
16r112233445566778800 bitTest:16rFF |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
581 |
16r112233445566778899 bitTest:16rFFFFFFFFFFFFFFFF00 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
582 |
16r112233445566778899 bitTest:16rFF0000000000000000 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
583 |
16r112233445566778899 bitTest:16r00000000000000FFFF |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
584 |
16r1234567800000000 bitTest:16r8000000000000000 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
585 |
16r8765432100000000 bitTest:16r8000000000000000 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
586 |
16r12345678 bitTest:16r80000000 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
587 |
16r87654321 bitTest:16r80000000 |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
588 |
" |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
589 |
|
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
590 |
"Modified: 16.5.1996 / 16:29:50 / cg" |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
591 |
! |
6c278dcd5570
added #bitTest: for general integers
Claus Gittinger <cg@exept.de>
parents:
1337
diff
changeset
|
592 |
|
701 | 593 |
bitXor:anInteger |
594 |
"return the bitwise-or of the receiver and the argument, anInteger. |
|
595 |
This is a general and slow implementation, walking over the bytes of |
|
596 |
the receiver and the argument." |
|
597 |
||
927
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
598 |
|n "{ Class: SmallInteger }" |
8d8edf9df0ae
fixed \\ vs. rem: and // vs. quo: stupidities;
Claus Gittinger <cg@exept.de>
parents:
701
diff
changeset
|
599 |
result byte| |
701 | 600 |
|
601 |
n := (anInteger digitLength) max:(self digitLength). |
|
602 |
result := self class basicNew numberOfDigits:n. |
|
1 | 603 |
|
701 | 604 |
1 to:n do:[:index | |
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
605 |
byte := (anInteger digitAt:index) bitXor:(self digitAt:index). |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
606 |
result digitAt:index put:byte. |
701 | 607 |
]. |
608 |
byte == 0 ifTrue:[ |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
609 |
^ result compressed |
701 | 610 |
]. |
611 |
^ result |
|
1 | 612 |
|
701 | 613 |
" |
614 |
(16r112233445566778899 bitXor:16rFF ) printStringRadix:16 '112233445566778866' |
|
615 |
(16r112233445566778899 bitXor:16rFFFFFFFFFFFFFFFF00) printStringRadix:16 'EEDDCCBBAA99887799' |
|
616 |
(16r112233445566778899 bitXor:16rFF0000000000000000) printStringRadix:16 'EE2233445566778899' |
|
617 |
(16r112233445566778899 bitXor:16r112233445566778800) printStringRadix:16 |
|
618 |
" |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
619 |
|
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
620 |
"Modified: 5.11.1996 / 14:06:40 / cg" |
1 | 621 |
! |
622 |
||
701 | 623 |
highBit |
624 |
"return the bitIndex of the highest bit set. The returned bitIndex |
|
625 |
starts at 1 for the least significant bit. Returns -1 if no bit is set." |
|
626 |
||
627 |
|byteNr highByte| |
|
628 |
||
629 |
byteNr := self digitLength. |
|
630 |
highByte := self digitAt:byteNr. |
|
631 |
^ (byteNr - 1) * 8 + highByte highBit |
|
1 | 632 |
|
701 | 633 |
" |
634 |
1 highBit |
|
635 |
(1 bitShift:1) highBit |
|
636 |
(1 bitShift:30) highBit |
|
637 |
(1 bitShift:31) highBit |
|
638 |
(1 bitShift:32) highBit |
|
639 |
(1 bitShift:33) highBit |
|
640 |
(1 bitShift:64) highBit |
|
641 |
(1 bitShift:1000) highBit |
|
642 |
((1 bitShift:64)-1) highBit |
|
643 |
" |
|
2429 | 644 |
! |
645 |
||
646 |
lowBit |
|
647 |
"return the bitIndex of the lowest bit set. The returned bitIndex |
|
648 |
starts at 1 for the least significant bit. Returns -1 if no bit is set." |
|
649 |
||
650 |
|maxBytes "{ Class: SmallInteger }" |
|
651 |
bitIndex "{ Class: SmallInteger }" |
|
652 |
byte| |
|
653 |
||
654 |
maxBytes := self digitLength. |
|
655 |
bitIndex := 0. |
|
656 |
1 to:maxBytes do:[:byteIndex | |
|
657 |
byte := self digitAt:byteIndex. |
|
658 |
byte ~~ 0 ifTrue:[ |
|
659 |
^ bitIndex + byte lowBit |
|
660 |
]. |
|
661 |
bitIndex := bitIndex + 8 |
|
662 |
]. |
|
663 |
^ -1 |
|
664 |
||
665 |
" |
|
666 |
0 lowBit |
|
667 |
1 lowBit |
|
668 |
(1 bitShift:1) lowBit |
|
669 |
(1 bitShift:1) highBit |
|
670 |
(1 bitShift:30) lowBit |
|
671 |
(1 bitShift:30) highBit |
|
672 |
(1 bitShift:31) lowBit |
|
673 |
(1 bitShift:31) highBit |
|
674 |
(1 bitShift:32) lowBit |
|
675 |
(1 bitShift:32) highBit |
|
676 |
(1 bitShift:33) lowBit |
|
677 |
(1 bitShift:33) highBit |
|
678 |
(1 bitShift:64) lowBit |
|
679 |
(1 bitShift:64) highBit |
|
680 |
(1 bitShift:1000) lowBit |
|
681 |
(1 bitShift:1000) highBit |
|
682 |
((1 bitShift:64)-1) lowBit |
|
683 |
((1 bitShift:64)-1) highBit |
|
684 |
" |
|
685 |
||
686 |
"Modified: 1.3.1997 / 16:54:23 / cg" |
|
701 | 687 |
! ! |
688 |
||
689 |
!Integer methodsFor:'coercing and converting'! |
|
690 |
||
1888 | 691 |
asFixedPoint |
692 |
"return the receiver as a fixedPoint number" |
|
693 |
||
694 |
^ FixedPoint numerator:self denominator:1 scale:1 |
|
695 |
||
696 |
" |
|
697 |
100 asFixedPoint |
|
698 |
100 asFixedPoint + 0.1 asFixedPoint |
|
699 |
" |
|
700 |
||
701 |
"Modified: 5.11.1996 / 15:13:17 / cg" |
|
702 |
! |
|
703 |
||
2141 | 704 |
asFixedPoint:scale |
705 |
"return the receiver as fixedPoint number, with the given number |
|
706 |
of post-decimal-point digits." |
|
707 |
||
708 |
^ FixedPoint numerator:self denominator:1 scale:scale |
|
709 |
||
710 |
" |
|
711 |
100 asFixedPoint:2 |
|
712 |
100 asFixedPoint + (0.1 asFixedPoint:2) |
|
713 |
" |
|
714 |
||
715 |
"Modified: 10.1.1997 / 20:00:08 / cg" |
|
716 |
! |
|
717 |
||
701 | 718 |
asFraction |
719 |
"return a Fraction with same value as receiver" |
|
720 |
||
721 |
^ Fraction numerator:self denominator:1 |
|
1 | 722 |
! |
723 |
||
701 | 724 |
asInteger |
1 | 725 |
"return the receiver truncated towards zero - |
726 |
for integers this is self" |
|
727 |
||
728 |
^ self |
|
1337 | 729 |
! |
730 |
||
731 |
signExtendedByteValue |
|
732 |
"return a smallInteger from sign-extending the 8'th bit. |
|
733 |
May be useful for communication interfaces" |
|
734 |
||
735 |
^ (self bitAnd:16rFF) signExtendedByteValue |
|
736 |
||
737 |
"Created: 7.5.1996 / 09:31:52 / cg" |
|
738 |
! |
|
739 |
||
740 |
signExtendedShortValue |
|
741 |
"return a smallInteger from sign-extending the 16'th bit. |
|
742 |
May be useful for communication interfaces" |
|
743 |
||
744 |
^ (self bitAnd:16rFFFF) signExtendedShortValue |
|
745 |
||
746 |
"Modified: 7.5.1996 / 09:31:57 / cg" |
|
1 | 747 |
! ! |
748 |
||
1976
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
749 |
!Integer methodsFor:'comparing'! |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
750 |
|
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
751 |
hash |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
752 |
"redefined to return smallInteger hashValues" |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
753 |
|
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
754 |
|v "{ Class: SmallInteger }" | |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
755 |
|
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
756 |
v := self bitAnd:16r1FFFFFFF. |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
757 |
self < 0 ifTrue:[^ v negated]. |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
758 |
^ v |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
759 |
|
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
760 |
"Created: 14.11.1996 / 12:12:27 / cg" |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
761 |
! ! |
f6e7094cd3e4
Integer>>hash returns a value clamped to the SmallInteger range
Claus Gittinger <cg@exept.de>
parents:
1893
diff
changeset
|
762 |
|
701 | 763 |
!Integer methodsFor:'double dispatching'! |
764 |
||
765 |
differenceFromFraction:aFraction |
|
766 |
"sent when a fraction does not know how to subtract the receiver, an integer" |
|
1 | 767 |
|
701 | 768 |
|d| |
1 | 769 |
|
701 | 770 |
d := aFraction denominator. |
771 |
^ (Fraction numerator:(aFraction numerator - (self * d)) |
|
772 |
denominator:d) reduced |
|
1 | 773 |
! |
774 |
||
701 | 775 |
productFromFraction:aFraction |
776 |
"sent when a fraction does not know how to multiply the receiver, an integer" |
|
1 | 777 |
|
701 | 778 |
^ (Fraction numerator:(self * aFraction numerator) |
779 |
denominator:aFraction denominator) reduced |
|
1 | 780 |
! |
781 |
||
701 | 782 |
quotientFromFraction:aFraction |
783 |
"sent when a fraction does not know how to divide the receiver, an integer" |
|
784 |
||
785 |
^ (Fraction numerator:aFraction numerator |
|
786 |
denominator:(self * aFraction denominator)) reduced |
|
787 |
! |
|
1 | 788 |
|
701 | 789 |
sumFromFraction:aFraction |
790 |
"sent when a fraction does not know how to add the receiver, an integer" |
|
791 |
||
792 |
|d| |
|
793 |
||
794 |
d := aFraction denominator. |
|
795 |
^ (Fraction numerator:(aFraction numerator + (self * d)) |
|
796 |
denominator:d) reduced |
|
1 | 797 |
! ! |
798 |
||
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
799 |
!Integer methodsFor:'helpers'! |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
800 |
|
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
801 |
gcd_helper:anInteger |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
802 |
"a helper for the greatest common divisor of the receiver and anInteger. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
803 |
Knuth's algorithm for large positive integers, with receiver being |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
804 |
larger than the arg." |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
805 |
|
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
806 |
| selfAbs argAbs selfLowBit argLowBit shift t | |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
807 |
|
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
808 |
selfAbs := self. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
809 |
argAbs := anInteger. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
810 |
|
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
811 |
selfLowBit := selfAbs lowBit - 1. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
812 |
argLowBit := argAbs lowBit - 1. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
813 |
shift := selfLowBit min:argLowBit. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
814 |
argAbs := argAbs bitShift:(argLowBit negated). |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
815 |
[selfAbs = 0] whileFalse:[ |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
816 |
selfAbs := selfAbs bitShift:(selfLowBit negated). |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
817 |
selfAbs < argAbs ifTrue:[ |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
818 |
t := selfAbs. selfAbs := argAbs. argAbs := t |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
819 |
]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
820 |
selfAbs := selfAbs - argAbs. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
821 |
selfLowBit := selfAbs lowBit - 1. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
822 |
]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
823 |
^ argAbs bitShift:shift |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
824 |
|
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
825 |
"Created: 1.3.1997 / 16:38:17 / cg" |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
826 |
"Modified: 1.3.1997 / 16:45:17 / cg" |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
827 |
! ! |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
828 |
|
1 | 829 |
!Integer methodsFor:'misc math'! |
830 |
||
701 | 831 |
acker:n |
1560 | 832 |
"return the value of acker(self, n). |
833 |
;-) Do not try with receivers > 3" |
|
701 | 834 |
|
835 |
(self == 0) ifTrue:[^ n + 1]. |
|
836 |
(n == 0) ifTrue:[^ (self - 1) acker: 1]. |
|
837 |
^ (self - 1) acker:(self acker:(n - 1)) |
|
838 |
||
839 |
" |
|
840 |
3 acker:2 |
|
841 |
" |
|
1560 | 842 |
|
843 |
"Modified: 18.7.1996 / 13:08:16 / cg" |
|
701 | 844 |
! |
845 |
||
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
846 |
divMod:aNumber |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
847 |
"return an array filled with self // aNumber and |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
848 |
self \\ aNumber. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
849 |
The result is only defined for positive receiver and argument. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
850 |
This may be redefined in some integer classes for |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
851 |
more performance (where the remainder is generated as a side effect of division)" |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
852 |
|
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
853 |
^ Array |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
854 |
with:(self // aNumber) |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
855 |
with:(self \\ aNumber) |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
856 |
|
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
857 |
" |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
858 |
10 divMod:3 |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
859 |
100 factorial divMod:103 |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
860 |
" |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
861 |
|
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
862 |
"Modified: 29.10.1996 / 21:18:58 / cg" |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
863 |
! |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
864 |
|
1 | 865 |
factorial |
1560 | 866 |
"return fac(self) (i.e. 1*2*3...*self) using an iterative algorithm. |
867 |
This is slightly faster than the recursive algorithm, and does not |
|
868 |
suffer from stack overflow problems (with big receivers)" |
|
869 |
||
2745 | 870 |
|p i| |
1560 | 871 |
|
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
872 |
(self < 2) ifTrue:[ |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
873 |
self < 0 ifTrue:[ |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
874 |
"/ |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
875 |
"/ requested factorial of a negative number |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
876 |
"/ |
2745 | 877 |
^ DomainErrorSignal raiseErrorString:'factorial of negative number' |
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
878 |
]. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
879 |
^ 1 |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
880 |
]. |
1560 | 881 |
p := 2. |
2745 | 882 |
i := 3. |
883 |
[i <= self] whileTrue:[ |
|
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
884 |
p := p * i. |
2745 | 885 |
i := i + 1. |
1560 | 886 |
]. |
887 |
^ p |
|
888 |
||
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
889 |
" |
1560 | 890 |
10 factorial |
891 |
1000 factorial |
|
892 |
10000 factorial |
|
893 |
10000 factorialR |
|
894 |
||
895 |
Time millisecondsToRun:[2000 factorial] |
|
896 |
Time millisecondsToRun:[2000 factorialR] |
|
2745 | 897 |
-1 factorial |
1560 | 898 |
" |
899 |
||
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
900 |
"Modified: 29.10.1996 / 20:58:43 / cg" |
1560 | 901 |
! |
902 |
||
903 |
factorialR |
|
904 |
"return fac(self) (i.e. 1*2*3...*self) using a recursive algorithm." |
|
1 | 905 |
|
356 | 906 |
(self >= 2) ifTrue:[ |
1560 | 907 |
^ self * (self - 1) factorialR |
1 | 908 |
]. |
356 | 909 |
^ 1 |
212 | 910 |
|
911 |
" |
|
1560 | 912 |
10 factorialR |
913 |
1000 factorialR |
|
212 | 914 |
" |
1560 | 915 |
|
916 |
"Created: 18.7.1996 / 12:48:36 / cg" |
|
1 | 917 |
! |
918 |
||
701 | 919 |
fastFib |
1559 | 920 |
"same result as returned by #fib. |
921 |
This method shows how a changed algorithm can |
|
701 | 922 |
change things much more drastic than tuning ... |
923 |
(compare 30 fib with 30 fastFib / dont even try 60 fib)" |
|
924 |
||
925 |
^ self fibUsingCache:(OrderedCollection new) |
|
926 |
||
927 |
" |
|
1422 | 928 |
Transcript showCR:(Time millisecondsToRun:[30 fib]) |
929 |
Transcript showCR:(Time millisecondsToRun:[30 fastFib]) |
|
930 |
Transcript showCR:(Time millisecondsToRun:[60 fastFib]) |
|
931 |
Transcript showCR:(Time millisecondsToRun:[200 fastFib]) |
|
701 | 932 |
" |
1559 | 933 |
|
934 |
"Modified: 18.7.1996 / 12:45:52 / cg" |
|
701 | 935 |
! |
936 |
||
937 |
fib |
|
1559 | 938 |
"compute the fibionacci number for the receiver. |
939 |
Dont use this method if you need fibionacci numbers - |
|
701 | 940 |
this method is for benchmarking purposes only. |
941 |
(use fastFib instead and dont ever try 60 fib ...)" |
|
942 |
||
943 |
(self > 1) ifTrue:[ |
|
1559 | 944 |
^ (self - 1) fib + (self - 2) fib |
701 | 945 |
]. |
946 |
^ 1 |
|
947 |
||
948 |
" |
|
949 |
10 fib |
|
950 |
20 fib |
|
1422 | 951 |
Transcript showCR:(Time millisecondsToRun:[30 fib]) |
701 | 952 |
" |
953 |
||
954 |
" |
|
1559 | 955 |
ds3100 486/50 Indy(no cache) P5/166 P5/166 |
956 |
interpreted compiled |
|
957 |
20804 4800 2145 14996 1303 |
|
701 | 958 |
" |
1559 | 959 |
|
960 |
"Modified: 18.7.1996 / 12:47:19 / cg" |
|
701 | 961 |
! |
962 |
||
963 |
fibUsingCache:fibCache |
|
964 |
"actual fastfib worker; keep track of already computed fib |
|
965 |
numbers in fibCache, which is passed around. Take value from |
|
966 |
the cache if already present. Doing so, the double recursive |
|
967 |
fib actually becomes a single recursive algorithm." |
|
968 |
||
969 |
|fib| |
|
970 |
||
971 |
self <= 1 ifTrue:[^ 1]. |
|
972 |
||
973 |
fibCache size >= self ifTrue:[ |
|
974 |
^ fibCache at:self |
|
975 |
]. |
|
976 |
fib := ((self - 2) fibUsingCache:fibCache) + ((self - 1) fibUsingCache:fibCache). |
|
977 |
||
978 |
fibCache grow:self. |
|
979 |
fibCache at:self put:fib. |
|
980 |
^ fib |
|
981 |
! |
|
982 |
||
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
983 |
gcd:anInteger |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
984 |
"return the greatest common divisor of the receiver and anInteger. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
985 |
Euclids & Knuths algorithm." |
1 | 986 |
|
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
987 |
|selfAbs argAbs| |
1 | 988 |
|
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
989 |
selfAbs := self abs. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
990 |
argAbs := anInteger abs. |
1888 | 991 |
|
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
992 |
selfAbs < argAbs ifTrue:[ |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
993 |
selfAbs = 0 ifTrue: [^ argAbs]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
994 |
argAbs := argAbs \\ selfAbs. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
995 |
argAbs = 0 ifTrue: [^ selfAbs]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
996 |
^ selfAbs gcd_helper:argAbs |
1 | 997 |
]. |
52 | 998 |
|
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
999 |
argAbs = 0 ifTrue: [^ selfAbs]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
1000 |
selfAbs := selfAbs \\ argAbs. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
1001 |
selfAbs = 0 ifTrue:[^ argAbs]. |
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
1002 |
^ argAbs gcd_helper:selfAbs |
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1003 |
|
2428
d54efc515824
better gcd for large integers
Claus Gittinger <cg@exept.de>
parents:
2408
diff
changeset
|
1004 |
"Modified: 1.3.1997 / 16:42:14 / cg" |
1 | 1005 |
! |
1006 |
||
1007 |
lcm:anInteger |
|
52 | 1008 |
"return the least common multiple (using gcd:)" |
1009 |
||
1010 |
^ (self * anInteger) abs // (self gcd: anInteger) |
|
1011 |
||
92 | 1012 |
" |
1013 |
65 lcm:15 |
|
1014 |
3 lcm:15 |
|
1015 |
" |
|
1 | 1016 |
! ! |
1017 |
||
1018 |
!Integer methodsFor:'printing & storing'! |
|
1019 |
||
49 | 1020 |
displayString |
1021 |
"return a string for displaying in a view (as in inspector). |
|
1022 |
The output radix is usually 10, but can be changed by setting |
|
1023 |
DefaultDisplayRadix (see Integer>>displayRadix:)" |
|
1024 |
||
54 | 1025 |
(DefaultDisplayRadix isNil or:[DefaultDisplayRadix == 10]) ifTrue:[ |
159 | 1026 |
^ self printString |
54 | 1027 |
]. |
49 | 1028 |
^ self radixPrintStringRadix:DefaultDisplayRadix |
1029 |
||
92 | 1030 |
" |
1031 |
Integer displayRadix:16. 12345 |
|
1032 |
Integer displayRadix:2. 12345 |
|
1033 |
Integer displayRadix:10. 12345 |
|
1034 |
" |
|
49 | 1035 |
! |
1036 |
||
701 | 1037 |
errorPrintHex |
1038 |
"print the receiver as a hex number on the standard error stream" |
|
1039 |
||
1040 |
(self printStringRadix:16) errorPrint |
|
1041 |
! |
|
1 | 1042 |
|
701 | 1043 |
hexPrintString |
1044 |
"return a hex string representation of the receiver" |
|
1045 |
||
1046 |
^ self printStringRadix:16 |
|
1047 |
! |
|
1048 |
||
2408 | 1049 |
hexPrintString:size |
1050 |
"return a hex string representation of the receiver, |
|
1051 |
padded to size characters" |
|
1052 |
||
1053 |
^ (self printStringRadix:16) leftPaddedTo:size with:$0 |
|
1054 |
||
1055 |
"Created: 18.2.1997 / 13:32:33 / cg" |
|
1056 |
! |
|
1057 |
||
701 | 1058 |
printHex |
1059 |
"print the receiver as a hex number on the standard output stream" |
|
1 | 1060 |
|
701 | 1061 |
(self printStringRadix:16) print |
1062 |
! |
|
1063 |
||
1064 |
printOn:aStream |
|
1065 |
"append a printed description of the receiver to aStream" |
|
1066 |
||
1067 |
aStream nextPutAll:(self printStringRadix:10) |
|
1068 |
! |
|
1069 |
||
1431
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1070 |
printOn:aStream base:base |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1071 |
"append a printed description of the receiver to aStream. |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1072 |
The receiver is printed in radix base (instead of the default, 10)." |
701 | 1073 |
|
1074 |
aStream nextPutAll:(self printStringRadix:base) |
|
1431
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1075 |
|
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1076 |
"Created: 20.5.1996 / 11:53:38 / cg" |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1077 |
! |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1078 |
|
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1079 |
printOn:aStream radix:base |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1080 |
"append a printed description of the receiver to aStream. |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1081 |
The receiver is printed in radix base (instead of the default, 10). |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1082 |
This method is obsoleted by #printOn:base:, which is ST-80 compatible." |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1083 |
|
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1084 |
aStream nextPutAll:(self printStringRadix:base) |
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1085 |
|
243d233bffa5
printOn:radix: -> printOn:base: (ST-80 compatibility)
Claus Gittinger <cg@exept.de>
parents:
1422
diff
changeset
|
1086 |
"Modified: 20.5.1996 / 11:54:10 / cg" |
701 | 1087 |
! |
1088 |
||
1089 |
printString |
|
1090 |
"return a string representation of the receiver" |
|
1091 |
||
1092 |
^ self printStringRadix:10 |
|
1 | 1093 |
! |
1094 |
||
1095 |
printStringRadix:aRadix |
|
1096 |
"return a string representation of the receiver in the specified |
|
1097 |
radix (without the initial XXr)" |
|
1098 |
||
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1099 |
|num s divMod div mod| |
1 | 1100 |
|
54 | 1101 |
(aRadix between:2 and:36) ifFalse:[ |
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1102 |
self error:'invalid radix'. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1103 |
^ self printStringRadix:10 |
54 | 1104 |
]. |
1105 |
||
1 | 1106 |
(self = 0) ifTrue:[^ '0']. |
1107 |
(self < 0) ifTrue:[ |
|
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1108 |
^ '-' , (self negated printStringRadix:aRadix) |
1 | 1109 |
]. |
92 | 1110 |
|
1111 |
" |
|
1112 |
claus: changed it from a recursive algorithm; |
|
1113 |
(it used to trigger stack-overflow exceptions when printing |
|
1114 |
3000 factorial ...) |
|
1115 |
" |
|
1116 |
"/ leftPart := self // aRadix. |
|
1117 |
"/ (leftPart ~= 0) ifTrue:[ |
|
1118 |
"/ ^ (leftPart printStringRadix:aRadix) copyWith:(Character digitValue:(self \\ aRadix)) |
|
1119 |
"/ ]. |
|
1120 |
"/ ^ (Character digitValue:self) asString |
|
1121 |
||
1122 |
num := self. |
|
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1123 |
divMod := num divMod:aRadix. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1124 |
div := divMod at:1. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1125 |
mod := divMod at:2. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1126 |
|
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1127 |
s := (Character digitValue:mod) asString. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1128 |
num := div. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1129 |
|
92 | 1130 |
[num ~= 0] whileTrue:[ |
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1131 |
divMod := num divMod:aRadix. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1132 |
div := divMod at:1. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1133 |
mod := divMod at:2. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1134 |
s := (Character digitValue:mod) asString , s. |
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1135 |
num := div. |
1 | 1136 |
]. |
92 | 1137 |
^ s |
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1138 |
|
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1139 |
"Modified: 29.10.1996 / 21:27:21 / cg" |
1 | 1140 |
! |
1141 |
||
1142 |
printStringRadix:aRadix size:sz fill:fillCharacter |
|
1143 |
"return a string representation of the receiver in the specified |
|
1144 |
radix. The string is padded on the left with fillCharacter to make |
|
1145 |
its size as specified in sz." |
|
1146 |
||
92 | 1147 |
|s| |
1 | 1148 |
|
1149 |
s := self printStringRadix:aRadix. |
|
1150 |
s size < sz ifTrue:[ |
|
159 | 1151 |
s := ((String new:(sz - s size)) atAllPut:fillCharacter) , s |
1 | 1152 |
]. |
1153 |
^ s |
|
1154 |
||
92 | 1155 |
" |
1156 |
1024 printStringRadix:16 size:4 fill:$0 |
|
1157 |
1024 printStringRadix:2 size:16 fill:$. |
|
1158 |
1024 printStringRadix:16 size:8 fill:(Character space) |
|
1159 |
" |
|
216 | 1160 |
! |
1161 |
||
701 | 1162 |
radixPrintStringRadix:aRadix |
1163 |
"return a string representation of the receiver in the specified |
|
1164 |
radix; prepend XXr to the string" |
|
1165 |
||
1166 |
^ (aRadix printString) , 'r', (self printStringRadix:aRadix) |
|
216 | 1167 |
|
701 | 1168 |
" |
1169 |
31 radixPrintStringRadix:2 |
|
1170 |
31 radixPrintStringRadix:3 |
|
1171 |
31 radixPrintStringRadix:36 |
|
1172 |
" |
|
1 | 1173 |
! ! |
1174 |
||
701 | 1175 |
!Integer methodsFor:'queries'! |
202 | 1176 |
|
701 | 1177 |
digitAt:n |
1178 |
"return the n-th byte of the binary representation. |
|
1179 |
This is a very stupid implementation, and should be redefined in |
|
1180 |
concrete subclasses." |
|
202 | 1181 |
|
701 | 1182 |
|num count| |
569
7134eb78cf48
readFrom:onError: can now also read from a string
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
1183 |
|
701 | 1184 |
num := self. |
1185 |
count := n. |
|
1186 |
[count > 1] whileTrue:[ |
|
1187 |
num := num // 256. |
|
1188 |
count := count - 1 |
|
202 | 1189 |
]. |
701 | 1190 |
^ num \\ 256 |
159 | 1191 |
|
1192 |
" |
|
701 | 1193 |
16r44332211 digitAt:1 |
1194 |
16r44332211 digitAt:2 |
|
1195 |
16r44332211 digitAt:3 |
|
1196 |
16r44332211 digitAt:4 |
|
1197 |
16r44332211 digitAt:5 |
|
1198 |
16r00332211 digitAt:4 |
|
1199 |
16r00332211 digitAt:5 |
|
159 | 1200 |
" |
1 | 1201 |
! |
1202 |
||
701 | 1203 |
digitLength |
1204 |
"return the number of bytes needed for the binary representation |
|
1205 |
of the receiver" |
|
1206 |
||
1207 |
^ (self log:256) ceiling asInteger |
|
1208 |
! |
|
1209 |
||
1210 |
isInteger |
|
1211 |
"return true, if the receiver is some kind of integer number" |
|
1212 |
||
1213 |
^ true |
|
1214 |
! ! |
|
202 | 1215 |
|
2458 | 1216 |
!Integer methodsFor:'special bit operators'! |
1217 |
||
1218 |
bitAnd_32:anInteger |
|
1219 |
"return a C-semantic 32bit locical-and of the receiver and |
|
1220 |
the argument. Both must be either Small- or LargeIntegers. |
|
1221 |
This (nonstandard) specialized method is provided to allow simulation of |
|
1222 |
and operations with C semantics." |
|
1223 |
||
1224 |
%{ /* NOCONTEXT */ |
|
1225 |
int val1, val2, rslt; |
|
1226 |
||
1227 |
if (__isSmallInteger(self)) { |
|
1228 |
val1 = __intVal(self); |
|
1229 |
} else if (__isLargeInteger(self)) { |
|
1230 |
val1 = __longIntVal(self); |
|
1231 |
if (!val1) goto bad; |
|
1232 |
} else { |
|
1233 |
goto bad; |
|
1234 |
} |
|
1235 |
if (__isSmallInteger(anInteger)) { |
|
1236 |
val2 = __intVal(anInteger); |
|
1237 |
} else if (__isLargeInteger(anInteger)) { |
|
1238 |
val2 = __longIntVal(anInteger); |
|
1239 |
if (!val2) goto bad; |
|
1240 |
} else { |
|
1241 |
goto bad; |
|
1242 |
} |
|
1243 |
rslt = val1 & val2; |
|
1244 |
RETURN(__MKINT(rslt)); |
|
1245 |
||
1246 |
bad: ; |
|
1247 |
%}. |
|
1248 |
self primitiveFailed. |
|
1249 |
! |
|
1250 |
||
1251 |
bitOr_32:anInteger |
|
1252 |
"return a C-semantic 32bit locical-or of the receiver and |
|
1253 |
the argument. Both must be either Small- or LargeIntegers. |
|
1254 |
This (nonstandard) specialized method is provided to allow simulation of |
|
1255 |
and operations with C semantics." |
|
1256 |
||
1257 |
%{ /* NOCONTEXT */ |
|
1258 |
int val1, val2, rslt; |
|
1259 |
||
1260 |
if (__isSmallInteger(self)) { |
|
1261 |
val1 = __intVal(self); |
|
1262 |
} else if (__isLargeInteger(self)) { |
|
1263 |
val1 = __longIntVal(self); |
|
1264 |
if (!val1) goto bad; |
|
1265 |
} else { |
|
1266 |
goto bad; |
|
1267 |
} |
|
1268 |
if (__isSmallInteger(anInteger)) { |
|
1269 |
val2 = __intVal(anInteger); |
|
1270 |
} else if (__isLargeInteger(anInteger)) { |
|
1271 |
val2 = __longIntVal(anInteger); |
|
1272 |
if (!val2) goto bad; |
|
1273 |
} else { |
|
1274 |
goto bad; |
|
1275 |
} |
|
1276 |
rslt = val1 | val2; |
|
1277 |
RETURN(__MKINT(rslt)); |
|
1278 |
||
1279 |
bad: ; |
|
1280 |
%}. |
|
1281 |
self primitiveFailed. |
|
1282 |
! ! |
|
1283 |
||
701 | 1284 |
!Integer methodsFor:'truncation & rounding'! |
1285 |
||
1286 |
ceiling |
|
1558 | 1287 |
"return the smallest integer which is larger or equal to the receiver. |
1288 |
For integers, this is the receiver itself." |
|
345 | 1289 |
|
701 | 1290 |
^ self |
1558 | 1291 |
|
1292 |
"Modified: 18.7.1996 / 12:44:06 / cg" |
|
701 | 1293 |
! |
345 | 1294 |
|
701 | 1295 |
compressed |
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1296 |
"if the receiver can be represented as a SmallInteger, return |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1297 |
a SmallInteger with my value; otherwise return self with leading |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1298 |
zeros removed. This method is redefined in LargeInteger." |
701 | 1299 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1300 |
^ self |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1301 |
|
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1302 |
"Modified: 5.11.1996 / 14:07:41 / cg" |
202 | 1303 |
! |
1304 |
||
701 | 1305 |
floor |
1558 | 1306 |
"return the largest integer which is smaller or equal to the receiver. |
1307 |
For integers, this is the receiver itself." |
|
701 | 1308 |
|
1309 |
^ self |
|
1558 | 1310 |
|
1311 |
"Modified: 18.7.1996 / 12:44:00 / cg" |
|
701 | 1312 |
! |
202 | 1313 |
|
1866
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1314 |
fractionPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1315 |
"return a number with value from digits after the decimal point. |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1316 |
(i.e. the receiver minus its truncated value) |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1317 |
Since integers have no fraction, return 0 here." |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1318 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1319 |
^ 0 |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1320 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1321 |
" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1322 |
1234.56789 fractionPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1323 |
1.2345e6 fractionPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1324 |
1000 fractionPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1325 |
10000000000000000 fractionPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1326 |
" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1327 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1328 |
"Modified: 4.11.1996 / 20:27:44 / cg" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1329 |
! |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1330 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1331 |
integerPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1332 |
"return a number with value from digits before the decimal point. |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1333 |
(i.e. the receivers truncated value) |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1334 |
Since integers have no fraction, return the receiver here." |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1335 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1336 |
^ self |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1337 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1338 |
" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1339 |
1234.56789 integerPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1340 |
1.2345e6 integerPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1341 |
1000 integerPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1342 |
10000000000000000 integerPart |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1343 |
" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1344 |
|
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1345 |
"Modified: 4.11.1996 / 20:28:22 / cg" |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1346 |
! |
225afe414934
added fractionPart & integerPart for protocol completeness
Claus Gittinger <cg@exept.de>
parents:
1842
diff
changeset
|
1347 |
|
701 | 1348 |
normalize |
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1349 |
"if the receiver can be represented as a SmallInteger, return |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1350 |
a SmallInteger with my value; otherwise return self with leading |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1351 |
zeros removed. |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1352 |
This method is left for backward compatibility - it has been |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1353 |
renamed to #compressed for ST-80 compatibility." |
1 | 1354 |
|
1883
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1355 |
^ self compressed |
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1356 |
|
d3fbf4b36be7
renamed #normalize to #compressed (ST_80 compat)
Claus Gittinger <cg@exept.de>
parents:
1866
diff
changeset
|
1357 |
"Modified: 5.11.1996 / 14:08:24 / cg" |
701 | 1358 |
! |
1 | 1359 |
|
701 | 1360 |
rounded |
1361 |
"return the receiver rounded toward the next Integer - |
|
1558 | 1362 |
for integers this is the receiver itself." |
701 | 1363 |
|
1364 |
^ self |
|
1558 | 1365 |
|
1366 |
"Modified: 18.7.1996 / 12:44:24 / cg" |
|
701 | 1367 |
! |
69 | 1368 |
|
701 | 1369 |
truncated |
1370 |
"return the receiver truncated towards zero - |
|
1558 | 1371 |
for integers this is the receiver itself." |
159 | 1372 |
|
701 | 1373 |
^ self |
1558 | 1374 |
|
1375 |
"Modified: 18.7.1996 / 12:44:33 / cg" |
|
701 | 1376 |
! ! |
569
7134eb78cf48
readFrom:onError: can now also read from a string
Claus Gittinger <cg@exept.de>
parents:
530
diff
changeset
|
1377 |
|
1842
b28609c73839
added divMod: for faster largeNumber printString generation.
Claus Gittinger <cg@exept.de>
parents:
1700
diff
changeset
|
1378 |
!Integer class methodsFor:'documentation'! |
701 | 1379 |
|
1380 |
version |
|
2745 | 1381 |
^ '$Header: /cvs/stx/stx/libbasic/Integer.st,v 1.64 1997-07-02 15:18:41 cg Exp $' |
1 | 1382 |
! ! |