author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Tue, 20 Aug 2013 00:07:19 +0100 | |
branch | jv |
changeset 18084 | ab5b38bd8f81 |
parent 18066 | 89d51443ba6f |
parent 15640 | d5a8c24894e2 |
child 18120 | e3a375d5f6a8 |
permissions | -rw-r--r-- |
1 | 1 |
" |
5 | 2 |
COPYRIGHT (c) 1989 by Claus Gittinger |
159 | 3 |
All Rights Reserved |
1 | 4 |
|
5 |
This software is furnished under a license and may be used |
|
6 |
only in accordance with the terms of that license and with the |
|
7 |
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 |
|
9 |
other person. No title to or ownership of the software is |
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10 |
hereby transferred. |
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11 |
" |
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"{ Package: 'stx:libbasic' }" |
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57 | 14 |
PeekableStream subclass:#PositionableStream |
973 | 15 |
instanceVariableNames:'collection position readLimit writeLimit' |
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16 |
classVariableNames:'ZeroPosition InvalidPositionErrorSignal' |
973 | 17 |
poolDictionaries:'' |
18 |
category:'Streams' |
|
1 | 19 |
! |
20 |
||
1897 | 21 |
!PositionableStream class methodsFor:'documentation'! |
88 | 22 |
|
23 |
copyright |
|
24 |
" |
|
25 |
COPYRIGHT (c) 1989 by Claus Gittinger |
|
159 | 26 |
All Rights Reserved |
1 | 27 |
|
88 | 28 |
This software is furnished under a license and may be used |
29 |
only in accordance with the terms of that license and with the |
|
30 |
inclusion of the above copyright notice. This software may not |
|
31 |
be provided or otherwise made available to, or used by, any |
|
32 |
other person. No title to or ownership of the software is |
|
33 |
hereby transferred. |
|
34 |
" |
|
35 |
! |
|
10 | 36 |
|
88 | 37 |
documentation |
38 |
" |
|
39 |
Instances of PositionableStream allow positioning the read pointer. |
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The PositionableStream class also adds methods for source-chunk reading |
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and writing, and for filing-in/out of source code. |
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42 |
|
88 | 43 |
This is an abstract class. |
1295 | 44 |
|
4405 | 45 |
Compatibility Notice: |
9434 | 46 |
In previous versions of ST/X, streams started with a 1-position (i.e. as in collections), |
47 |
while ST-80 has always been using 0-based postions for streams and 1-based positions for collections. |
|
4405 | 48 |
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49 |
THIS CERTAINLY IS BAD. |
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Although this is confusing ST/X has been changed to now also use 0-based stream positioning. |
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4405 | 52 |
|
1295 | 53 |
[author:] |
9434 | 54 |
Claus Gittinger |
88 | 55 |
" |
56 |
! ! |
|
1 | 57 |
|
1897 | 58 |
!PositionableStream class methodsFor:'initialization'! |
1 | 59 |
|
10 | 60 |
initialize |
15353 | 61 |
ZeroPosition := 0. "/ changed with stx rel5.1; |
62 |
"/ rel6.2: no longer used (i.e. 0 has now ben hardcoded) |
|
63 |
"/ class variable to be eliminated. |
|
7363 | 64 |
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InvalidPositionErrorSignal isNil ifTrue:[ |
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Convert Object>>errorSignal -> Error
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InvalidPositionErrorSignal := PositionOutOfBoundsError. |
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Convert Object>>errorSignal -> Error
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InvalidPositionErrorSignal notifierString:'position out of bounds: '. |
10 | 68 |
] |
69 |
! ! |
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1 | 70 |
|
1897 | 71 |
!PositionableStream class methodsFor:'instance creation'! |
1 | 72 |
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on:aCollection |
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"return a new PositionableStream streaming on aCollection" |
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75 |
||
76 |
^ (self basicNew) on:aCollection |
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! |
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78 |
||
79 |
on:aCollection from:first to:last |
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"return a new PositionableStream streaming on aCollection |
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from first to last" |
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82 |
||
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^ (self basicNew) on:aCollection from:first to:last |
57 | 84 |
! |
85 |
||
86 |
with:aCollection |
|
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"return a new PositionableStream streaming on aCollection, |
|
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the stream is positioned to the end of the collection." |
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89 |
||
362 | 90 |
^ (self basicNew) with:aCollection |
1 | 91 |
! ! |
92 |
||
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!PositionableStream class methodsFor:'Signal constants'! |
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handle empty chunks when filing in
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94 |
|
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handle empty chunks when filing in
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invalidPositionErrorSignal |
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"return the signal raised if positioning is attempted to an |
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invalid position (i.e. before the begin of the stream or after |
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the end)" |
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99 |
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^ PositionOutOfBoundsError |
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! ! |
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102 |
|
1897 | 103 |
!PositionableStream class methodsFor:'constants'! |
1 | 104 |
|
4405 | 105 |
zeroPosition |
106 |
"return the number, which marks the initial position. |
|
107 |
Compatibility Notice: |
|
9434 | 108 |
In previous versions of ST/X, streams started with a 1-position (i.e. as in collections), |
109 |
while ST-80 has always been using 0-based postions for streams and 1-based positions for collections. |
|
4405 | 110 |
|
9434 | 111 |
Although this is confusing ST/X has been changed to now also use 0-based stream positioning. |
112 |
" |
|
4405 | 113 |
|
15353 | 114 |
^ 0 |
9434 | 115 |
|
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"Modified: / 13-07-2006 / 20:36:54 / cg" |
|
360 | 117 |
! ! |
118 |
||
7261 | 119 |
!PositionableStream methodsFor:'Compatibility-Dolphin'! |
6413 | 120 |
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121 |
endChunk |
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self nextPutChunkSeparator |
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! ! |
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124 |
||
9284 | 125 |
!PositionableStream methodsFor:'Compatibility-ST/V'! |
126 |
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127 |
skipTo:anElement |
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"ST/V compatibility: |
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skip for the element given by the argument, anElement; |
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return nil if not found, self otherwise. |
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On a successful match, the next read will return the element after anElement." |
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||
133 |
^ self skipThrough:anElement |
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||
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" |
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|s| |
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s := ReadStream on:'12345678901234567890'. |
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s skipTo:$5. |
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s copyFrom:1 to:(s position). |
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s upToEnd |
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" |
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! ! |
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||
1 | 144 |
!PositionableStream methodsFor:'accessing'! |
145 |
||
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String new -> uninitializedNew: / basicNew:
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collection |
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String new -> uninitializedNew: / basicNew:
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^ collection |
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String new -> uninitializedNew: / basicNew:
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! |
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String new -> uninitializedNew: / basicNew:
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|
1 | 150 |
contents |
151 |
"return the entire contents of the stream" |
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152 |
||
153 |
^ collection |
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154 |
! |
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155 |
||
156 |
peek |
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"look ahead for and return the next element" |
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158 |
||
159 |
|peekObject| |
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160 |
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161 |
peekObject := self next. |
|
10 | 162 |
self backStep. |
1 | 163 |
^ peekObject |
164 |
! |
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165 |
||
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peekForAll:aCollection |
167 |
"return true and advance if the next elements are the same |
|
168 |
as aCollection. |
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otherwise stay and let the position unchanged" |
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170 |
||
171 |
|oldPos| |
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172 |
||
173 |
oldPos := self position. |
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(self next:(aCollection size)) = aCollection ifTrue:[ |
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^ true |
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]. |
177 |
self position:oldPos. |
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^ false |
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"Created: 1.3.1997 / 15:11:25 / cg" |
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! |
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||
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readLimit |
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"return the read-limit; thats the position at which EOF is returned" |
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added read-access to readLimit.
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185 |
|
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added read-access to readLimit.
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186 |
^ readLimit |
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187 |
|
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added read-access to readLimit.
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"Created: / 30.10.1998 / 16:47:04 / cg" |
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added read-access to readLimit.
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! |
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190 |
|
1 | 191 |
readLimit:aNumber |
369 | 192 |
"set the read-limit; thats the position at which EOF is returned" |
1 | 193 |
|
194 |
readLimit := aNumber |
|
369 | 195 |
! |
196 |
||
14934 | 197 |
setCollection:newCollection |
198 |
collection := newCollection |
|
199 |
! |
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200 |
||
369 | 201 |
writeLimit:aNumber |
202 |
"set the writeLimit; thats the position after which writing is prohibited" |
|
203 |
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204 |
writeLimit := aNumber |
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10592 | 205 |
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206 |
" |
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207 |
|s| |
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208 |
s := WriteStream on:String new. |
|
209 |
s nextPutAll:'hello world'. |
|
210 |
s contents. |
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211 |
||
212 |
|s| |
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213 |
s := WriteStream on:String new. |
|
214 |
s writeLimit:5. |
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s nextPutAll:'hello world'. |
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216 |
s contents. |
|
217 |
||
218 |
" |
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219 |
||
220 |
"Modified: / 04-06-2007 / 17:21:55 / cg" |
|
1 | 221 |
! ! |
222 |
||
611 | 223 |
!PositionableStream methodsFor:'positioning'! |
224 |
||
225 |
backStep |
|
226 |
"move backward read position by one" |
|
227 |
||
4405 | 228 |
self position:(self position - 1) |
611 | 229 |
! |
230 |
||
231 |
position |
|
15615 | 232 |
"return the read position (0-based)" |
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233 |
|
15348 | 234 |
^ position |
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235 |
! |
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236 |
|
15615 | 237 |
position0Based |
238 |
<resource: #obsolete> |
|
239 |
"return the read position 0-based" |
|
240 |
||
241 |
^ self position |
|
242 |
! |
|
243 |
||
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|
244 |
position0Based:index0Based |
15615 | 245 |
<resource: #obsolete> |
4405 | 246 |
"set the read (or write) position" |
611 | 247 |
|
15615 | 248 |
self position:index0Based |
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249 |
! |
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prep for 0-based stream position
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250 |
|
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251 |
position1Based |
15615 | 252 |
<resource: #obsolete> |
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|
253 |
"return the read position 1-based" |
611 | 254 |
|
15615 | 255 |
^ self position + 1 |
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256 |
! |
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prep for 0-based stream position
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parents:
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|
257 |
|
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258 |
position1Based:index1Based |
15615 | 259 |
<resource: #obsolete> |
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260 |
"set the read (or write) position" |
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|
261 |
|
15615 | 262 |
self position:(index1Based - 1) |
4405 | 263 |
|
264 |
" |
|
265 |
|s| |
|
266 |
||
267 |
s := '1234567890' readStream. |
|
268 |
s next:5. |
|
269 |
s position:1. |
|
270 |
s next:7. |
|
271 |
" |
|
272 |
||
273 |
" |
|
274 |
|s| |
|
275 |
||
276 |
s := '' writeStream. |
|
277 |
s nextPutAll:'1234567890'. |
|
278 |
s position:5. |
|
279 |
s nextPutAll:'abcdefg'. |
|
280 |
s contents |
|
281 |
" |
|
282 |
||
283 |
" |
|
284 |
|s| |
|
285 |
||
286 |
s := '' writeStream. |
|
287 |
s nextPutAll:'1234567890'. |
|
288 |
s position:0. |
|
289 |
s nextPutAll:'abcdefg'. |
|
290 |
s contents |
|
291 |
" |
|
611 | 292 |
! |
293 |
||
15615 | 294 |
position:index0Based |
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|
295 |
"set the read (or write) position" |
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parents:
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diff
changeset
|
296 |
|
15615 | 297 |
((index0Based > readLimit) or:[index0Based < 0]) ifTrue: [^ self positionError:index0Based]. |
298 |
position := index0Based |
|
6626
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#positionStartingAt0 and #positionStartingAt1
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299 |
! |
f7b08d6bee3f
#positionStartingAt0 and #positionStartingAt1
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|
300 |
|
611 | 301 |
reset |
302 |
"set the read position to the beginning of the collection" |
|
303 |
||
5308 | 304 |
self resetPosition |
305 |
||
306 |
" |
|
307 |
|s| |
|
308 |
||
309 |
s := 'hello world' readStream. |
|
310 |
Transcript showCR:(s next:5). |
|
311 |
s reset. |
|
312 |
Transcript showCR:(s next:10). |
|
313 |
" |
|
314 |
! |
|
315 |
||
316 |
resetPosition |
|
317 |
"set the read position to the beginning of the collection" |
|
318 |
||
15348 | 319 |
position := 0 |
4405 | 320 |
|
321 |
" |
|
322 |
|s| |
|
323 |
||
324 |
s := 'hello world' readStream. |
|
325 |
Transcript showCR:(s next:5). |
|
326 |
s reset. |
|
327 |
Transcript showCR:(s next:10). |
|
328 |
" |
|
611 | 329 |
! |
330 |
||
331 |
setToEnd |
|
11433 | 332 |
"set the read position to the end of the collection. |
333 |
#next will return EOF, #nextPut: will append to the stream. |
|
334 |
(same Behavior as FileStream." |
|
611 | 335 |
|
15348 | 336 |
position := readLimit |
611 | 337 |
! |
338 |
||
339 |
skip:numberToSkip |
|
340 |
"skip the next numberToSkip elements" |
|
341 |
||
5774 | 342 |
numberToSkip ~~ 0 ifTrue:[ |
7051
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parents:
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diff
changeset
|
343 |
self position:(self position + numberToSkip) |
5774 | 344 |
] |
1489
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moved some skip methods from readStream;
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parents:
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diff
changeset
|
345 |
! |
9e3b166483fb
moved some skip methods from readStream;
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parents:
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diff
changeset
|
346 |
|
9e3b166483fb
moved some skip methods from readStream;
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parents:
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diff
changeset
|
347 |
skipThroughAll:aCollection |
9e3b166483fb
moved some skip methods from readStream;
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parents:
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diff
changeset
|
348 |
"skip for and through the sequence given by the argument, aCollection; |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
349 |
return nil if not found, self otherwise. |
9e3b166483fb
moved some skip methods from readStream;
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parents:
1420
diff
changeset
|
350 |
On a successful match, the next read will return elements after aCollection; |
2153
244e36cbbd9b
skipThroughAll: does not need the old position
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parents:
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diff
changeset
|
351 |
if no match was found, the receiver will be positioned at the end. |
244e36cbbd9b
skipThroughAll: does not need the old position
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parents:
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diff
changeset
|
352 |
This is redefined here, to make use of positioning." |
1489
9e3b166483fb
moved some skip methods from readStream;
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parents:
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diff
changeset
|
353 |
|
7054
685d359f9847
code rewritten to be independent of stream zero-base
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parents:
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diff
changeset
|
354 |
|buffer len first idx| |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
355 |
|
7054
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
356 |
len := aCollection size. |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
357 |
first := aCollection at:1. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
358 |
[self atEnd] whileFalse:[ |
7054
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
359 |
buffer := self nextAvailable:len. |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
360 |
buffer = aCollection ifTrue:[ |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
361 |
^ self |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
362 |
]. |
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
363 |
buffer size == len ifTrue:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
364 |
"expect more input" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
365 |
idx := buffer indexOf:first startingAt:2. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
366 |
idx == 0 ifFalse:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
367 |
self position:(self position - len + idx - 1) |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
368 |
]. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
369 |
]. |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
370 |
]. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
371 |
^ nil |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
372 |
|
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
373 |
" |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
374 |
|s| |
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
375 |
s := ReadStream on:'12345678901234567890a'. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
376 |
s skipThroughAll:'90ab'. |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
377 |
s upToEnd |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
378 |
" |
2153
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
379 |
" |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
380 |
|s| |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
381 |
s := ReadStream on:'12345678901234567890'. |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
382 |
s skipThroughAll:'1234'. |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
383 |
s upToEnd |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
384 |
" |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
385 |
" |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
386 |
|s| |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
387 |
s := ReadStream on:'12345678901234567890'. |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
388 |
s skipThroughAll:'999'. |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
389 |
s atEnd |
244e36cbbd9b
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2130
diff
changeset
|
390 |
" |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
391 |
|
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
392 |
"Created: 26.6.1996 / 09:35:35 / cg" |
2154
89e96599e1e2
skipThroughAll: does not need the old position
Claus Gittinger <cg@exept.de>
parents:
2153
diff
changeset
|
393 |
"Modified: 11.1.1997 / 19:16:38 / cg" |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
394 |
! |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
395 |
|
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
396 |
skipToAll:aCollection |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
397 |
"skip for the sequence given by the argument, aCollection; |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
398 |
return nil if not found, self otherwise. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
399 |
On a successful match, the next read will return elements of aCollection." |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
400 |
|
7054
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
401 |
|oldPos buffer len first idx| |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
402 |
|
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
403 |
oldPos := self position. |
7054
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
404 |
len := aCollection size. |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
405 |
first := aCollection at:1. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
406 |
[self atEnd] whileFalse:[ |
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
407 |
buffer := self nextAvailable:len. |
7054
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
408 |
buffer = aCollection ifTrue:[ |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
409 |
self position:(self position - len). |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
410 |
^ self |
685d359f9847
code rewritten to be independent of stream zero-base
Claus Gittinger <cg@exept.de>
parents:
7053
diff
changeset
|
411 |
]. |
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
412 |
buffer size == len ifTrue:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
413 |
"more input can be expected" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
414 |
idx := buffer indexOf:first startingAt:2. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
415 |
idx == 0 ifFalse:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
416 |
self position:(self position - len + idx - 1) |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
417 |
]. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
418 |
]. |
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
419 |
]. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
420 |
self position:oldPos. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
421 |
^ nil |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
422 |
|
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
423 |
" |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
424 |
|s| |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
425 |
s := ReadStream on:'12345678901234567890'. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
426 |
s skipToAll:'901'. |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
427 |
s upToEnd |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
428 |
" |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
429 |
|
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
430 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
431 |
|s| |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
432 |
s := ReadStream on:'1234567890'. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
433 |
s skipToAll:'901'. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
434 |
s upToEnd |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
435 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
436 |
|
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
437 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
438 |
|s| |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
439 |
s := 'Makefile' asFilename readStream. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
440 |
[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
441 |
(s skipToAll:'EDIT') notNil ifTrue:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
442 |
s next:100. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
443 |
]. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
444 |
] ensure:[ |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
445 |
s close. |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
446 |
] |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
447 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
448 |
|
1489
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
449 |
"Modified: 26.6.1996 / 09:28:27 / cg" |
9e3b166483fb
moved some skip methods from readStream;
Claus Gittinger <cg@exept.de>
parents:
1420
diff
changeset
|
450 |
"Created: 26.6.1996 / 09:35:06 / cg" |
44 | 451 |
! ! |
611 | 452 |
|
10357
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
453 |
!PositionableStream methodsFor:'printing & storing'! |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
454 |
|
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
455 |
printOn:aStream |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
456 |
aStream nextPutAll:self className; nextPutAll:'(on:'; nextPutAll:collection classNameWithArticle; nextPut:$) |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
457 |
|
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
458 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
459 |
'' readStream printString |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
460 |
'' writeStream printString |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
461 |
" |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
462 |
! ! |
66543e405aa4
Fix #skipToAll: (partial match at end of stream
Stefan Vogel <sv@exept.de>
parents:
10001
diff
changeset
|
463 |
|
611 | 464 |
!PositionableStream methodsFor:'private'! |
465 |
||
466 |
contentsSpecies |
|
467 |
"return a class of which instances will be returned, when |
|
468 |
parts of the collection are asked for. |
|
15640 | 469 |
(see upTo-kind of methods in Stream)" |
611 | 470 |
|
471 |
^ collection species |
|
472 |
! |
|
473 |
||
474 |
on:aCollection |
|
475 |
"setup for streaming on aCollection" |
|
476 |
||
477 |
collection := aCollection. |
|
478 |
readLimit := aCollection size. |
|
13379 | 479 |
readLimit == 0 ifTrue:[ |
480 |
self assert:(aCollection isCollection) |
|
481 |
]. |
|
15348 | 482 |
position := 0 |
611 | 483 |
! |
484 |
||
485 |
on:aCollection from:first to:last |
|
486 |
"setup for streaming on aCollection from first to last" |
|
487 |
||
488 |
collection := aCollection. |
|
15348 | 489 |
position := first - 1. |
611 | 490 |
readLimit := last |
491 |
! |
|
492 |
||
493 |
positionError |
|
1998 | 494 |
"{ Pragma: +optSpace }" |
495 |
||
2966 | 496 |
"report an error when positioning past the end |
497 |
or before the beginning." |
|
611 | 498 |
|
8320
229adaeaf183
Use exception classes instead of class vars
Stefan Vogel <sv@exept.de>
parents:
8318
diff
changeset
|
499 |
^ PositionOutOfBoundsError raiseRequestWith:nil |
4452
3d050f505a0a
Raise proceedable signals proceedable.
Stefan Vogel <sv@exept.de>
parents:
4416
diff
changeset
|
500 |
|
3d050f505a0a
Raise proceedable signals proceedable.
Stefan Vogel <sv@exept.de>
parents:
4416
diff
changeset
|
501 |
"Modified: / 26.7.1999 / 10:59:13 / stefan" |
611 | 502 |
! |
503 |
||
6314 | 504 |
positionError:badPostition |
505 |
"{ Pragma: +optSpace }" |
|
506 |
||
507 |
"report an error when positioning past the end |
|
508 |
or before the beginning." |
|
509 |
||
8320
229adaeaf183
Use exception classes instead of class vars
Stefan Vogel <sv@exept.de>
parents:
8318
diff
changeset
|
510 |
^ PositionOutOfBoundsError raiseRequestWith:badPostition |
6314 | 511 |
! |
512 |
||
611 | 513 |
with:aCollection |
514 |
"setup for streaming to the end of aCollection" |
|
515 |
||
516 |
collection := aCollection. |
|
11434 | 517 |
readLimit := aCollection size. |
611 | 518 |
self setToEnd |
11434 | 519 |
|
520 |
" |
|
521 |
(WriteStream with:#(1 2 3 4 5)) |
|
522 |
nextPut:6; |
|
523 |
contents |
|
524 |
" |
|
611 | 525 |
! ! |
526 |
||
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
527 |
!PositionableStream methodsFor:'reading'! |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
528 |
|
9003 | 529 |
nextAvailable:count |
530 |
|end result| |
|
531 |
||
532 |
end := position + count. |
|
15357 | 533 |
end >= readLimit ifTrue:[ |
9003 | 534 |
end := readLimit. |
535 |
]. |
|
536 |
||
15348 | 537 |
result := collection copyFrom:position+1 to:end. |
9003 | 538 |
position := end. |
539 |
^ result. |
|
540 |
||
541 |
" |
|
542 |
'abc' readStream nextAvailable:1. |
|
543 |
'abc' readStream nextAvailable:2. |
|
544 |
'abc' readStream nextAvailable:3. |
|
545 |
'abc' readStream nextAvailable:4. |
|
546 |
||
547 |
'abc' readStream nextAvailable:2; nextAvailable:2. |
|
548 |
'abc' readStream nextAvailable:3; nextAvailable:3. |
|
549 |
" |
|
550 |
! |
|
551 |
||
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
552 |
upToAll:aCollection |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
553 |
"read until a subcollection consisisting of the elements in aCollection |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
554 |
is encountered. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
555 |
Return everything read excluding the elements in aCollection. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
556 |
The position is left before the collection; i.e. the next |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
557 |
read operations will return those elements. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
558 |
If no such subcollection is encountered, all elements up to the end |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
559 |
are read and returned. |
6494 | 560 |
See also #throughAll: which also reads up to some objects |
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
561 |
but positions behind it and DOES include it in the returned |
3184
d99302322139
Ok, #upToAll: positions after the collection.
Stefan Vogel <sv@exept.de>
parents:
3170
diff
changeset
|
562 |
collection. |
6494 | 563 |
See also #upToAllExcluding:, which returns the same, but leaves the |
564 |
read pointer after the matched subcollection. |
|
3184
d99302322139
Ok, #upToAll: positions after the collection.
Stefan Vogel <sv@exept.de>
parents:
3170
diff
changeset
|
565 |
|
d99302322139
Ok, #upToAll: positions after the collection.
Stefan Vogel <sv@exept.de>
parents:
3170
diff
changeset
|
566 |
Note: this behavior is inconsistent with the other upTo.. methods, |
15159
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
567 |
which position after the found item. We implement the method |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
568 |
this way for the sake of ST80-compatibility." |
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
569 |
|
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
570 |
|answerStream element last rslt| |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
571 |
|
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
572 |
last := aCollection last. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
573 |
answerStream := WriteStream on:(self contentsSpecies new). |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
574 |
[self atEnd] whileFalse:[ |
15159
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
575 |
element := self next. |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
576 |
answerStream nextPut:element. |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
577 |
element == last ifTrue:[ |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
578 |
((rslt := answerStream contents) endsWith:aCollection) ifTrue:[ |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
579 |
self position:(self position - aCollection size). |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
580 |
^ rslt copyButLast:aCollection size |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
581 |
] |
b94bdee97afa
Changed usage of deprecated #copyWithoutLast: to #copyButLast:
Stefan Vogel <sv@exept.de>
parents:
14934
diff
changeset
|
582 |
]. |
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
583 |
]. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
584 |
^ answerStream contents |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
585 |
|
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
586 |
" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
587 |
|s| |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
588 |
s := ReadStream on:'hello world'. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
589 |
Transcript show:'<'; show:(s upToAll:'wo'); showCR:'>'. |
6494 | 590 |
Transcript showCR:s atEnd. |
3170
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
591 |
Transcript show:'<'; show:(s upToEnd); showCR:'>'. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
592 |
" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
593 |
" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
594 |
|s| |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
595 |
s := ReadStream on:'hello world'. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
596 |
Transcript show:'<'; show:(s upToAll:'xx'); showCR:'>'. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
597 |
Transcript showCR:s atEnd. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
598 |
Transcript show:'<'; show:(s upToEnd); showCR:'>'. |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
599 |
" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
600 |
|
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
601 |
"Modified: / 12.1.1998 / 22:06:42 / cg" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
602 |
"Created: / 12.1.1998 / 22:07:01 / cg" |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
603 |
! ! |
7b299d83c45a
moved upToAll: to positionableStream.
Claus Gittinger <cg@exept.de>
parents:
3032
diff
changeset
|
604 |
|
611 | 605 |
!PositionableStream methodsFor:'testing'! |
606 |
||
607 |
atEnd |
|
608 |
"return true, if the read-position is at the end" |
|
609 |
||
15357 | 610 |
^ position >= readLimit |
611 | 611 |
! |
612 |
||
613 |
isEmpty |
|
614 |
"return true, if the contents of the stream is empty" |
|
615 |
||
616 |
^ readLimit == 0 |
|
9006 | 617 |
! |
618 |
||
10577 | 619 |
isInternalByteStream |
620 |
"return true, if the stream is an internal stream reading bytes" |
|
621 |
||
622 |
^ collection class isBytes |
|
623 |
||
624 |
"Created: / 30-05-2007 / 16:16:12 / cg" |
|
625 |
! |
|
626 |
||
9006 | 627 |
isPositionable |
628 |
"return true, if the stream supports positioning (this one is)" |
|
629 |
||
630 |
^ true |
|
611 | 631 |
! ! |
632 |
||
1897 | 633 |
!PositionableStream class methodsFor:'documentation'! |
701 | 634 |
|
635 |
version |
|
15640 | 636 |
^ '$Header: /cvs/stx/stx/libbasic/PositionableStream.st,v 1.161 2013-08-18 10:56:02 cg Exp $' |
13379 | 637 |
! |
638 |
||
639 |
version_CVS |
|
15640 | 640 |
^ '$Header: /cvs/stx/stx/libbasic/PositionableStream.st,v 1.161 2013-08-18 10:56:02 cg Exp $' |
701 | 641 |
! ! |
6777
5efddf5358b2
currentFileInDirectory query
Claus Gittinger <cg@exept.de>
parents:
6707
diff
changeset
|
642 |
|
14934 | 643 |
|
611 | 644 |
PositionableStream initialize! |