author | Stefan Vogel <sv@exept.de> |
Mon, 24 Mar 2014 12:28:33 +0100 | |
changeset 16275 | 062c57a36882 |
parent 16207 | 923f92b4f0e8 |
child 16340 | 6203956d63ee |
permissions | -rw-r--r-- |
1 | 1 |
" |
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COPYRIGHT (c) 1989 by Claus Gittinger |
177 | 3 |
All Rights Reserved |
1 | 4 |
|
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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No longer a subclass of UnboundedExternalStream, now subclass of ExternalStream.
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ExternalStream subclass:#NonPositionableExternalStream |
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instanceVariableNames:'' |
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classVariableNames:'StdInStream StdOutStream StdErrorStream' |
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poolDictionaries:'' |
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category:'Streams-External' |
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! |
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!NonPositionableExternalStream primitiveDefinitions! |
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%{ |
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#ifndef _STDIO_H_INCLUDED_ |
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# include <stdio.h> |
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# define _STDIO_H_INCLUDED_ |
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#endif |
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#ifndef REMOVE_LATER |
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# define __win32_stdout() stdout |
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# define __win32_stderr() stderr |
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# define __win32_stdin() stdin |
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#else |
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extern FILE *__win32_stdin(); |
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extern FILE *__win32_stderr(); |
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extern FILE *__win32_stdout(); |
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#endif |
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%} |
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! ! |
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!NonPositionableExternalStream class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1989 by Claus Gittinger |
|
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All Rights Reserved |
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|
50 |
This software is furnished under a license and may be used |
|
51 |
only in accordance with the terms of that license and with the |
|
52 |
inclusion of the above copyright notice. This software may not |
|
53 |
be provided or otherwise made available to, or used by, any |
|
54 |
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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||
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documentation |
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" |
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This class provides common protocol for all non-positionable, |
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external streams. Concrete subclasses are terminal streams, pipe streams, |
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PrinterStreams, Sockets etc. |
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There are three special instances of this class, representing stdin, |
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stdout and stderr of the smalltalk/X process (see Unix manuals, if you |
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dont know what those are used for). These special streams are bound to |
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to globals Stdin, Stdout and Stderr at early initialization time |
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(see Smalltalk>>initializeStandardStreams). |
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The name of this class is a historical leftover - it should be called |
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'TTYStream' or similar. |
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[author:] |
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Claus Gittinger |
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" |
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! ! |
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||
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!NonPositionableExternalStream class methodsFor:'instance creation'! |
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forStderr |
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"{ Pragma: +optSpace }" |
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"return a NonPositionableExternalStream object for writing to |
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Unixes standard error output file descriptor" |
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StdErrorStream isNil ifTrue:[ |
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StdErrorStream := self basicNew initializeForStderr |
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]. |
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^ StdErrorStream |
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! |
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||
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forStdin |
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"{ Pragma: +optSpace }" |
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"return a NonPositionableExternalStream object for reading from |
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Unixes standard input file descriptor" |
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||
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StdInStream isNil ifTrue:[ |
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StdInStream := self basicNew initializeForStdin |
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]. |
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^ StdInStream |
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! |
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forStdout |
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"{ Pragma: +optSpace }" |
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||
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"return a NonPositionableExternalStream object for writing to |
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Unixes standard output file descriptor" |
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||
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StdOutStream isNil ifTrue:[ |
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StdOutStream := self basicNew initializeForStdout |
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]. |
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^ StdOutStream |
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! |
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makePTYPair |
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"return an array with two streams - the first one is the master, |
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the second the slave of a ptym/ptys pair. |
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This is much like a bidirectional pipe, but allows signals & |
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control chars to be passed through the connection. |
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This is needed to execute a shell in a view. |
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This is the higher level equivalent of OperatingSystem>>makePTYPair |
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(which returns an array of file-descriptors)." |
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|ptyPair master slave| |
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ptyPair := OperatingSystem makePTYPair. |
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ptyPair notNil ifTrue:[ |
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master := self forReadWriteToFileDescriptor:(ptyPair at:1). |
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master buffered:false. |
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slave := self forReadWriteToFileDescriptor:(ptyPair at:2). |
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slave buffered:false. |
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ptyPair at:1 put:master. |
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ptyPair at:2 put:slave. |
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^ ptyPair |
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]. |
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^ nil |
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" |
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ExternalStream makePTYPair. |
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" |
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"Modified: 29.2.1996 / 18:28:36 / cg" |
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! |
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makePipe |
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"return an array with two streams - the first one for reading, |
149 |
the second for writing. |
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This is the higher level equivalent of OperatingSystem>>makePipe |
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(which returns an array of file-descriptors)." |
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|
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|pipe rs ws| |
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|
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#retry makePipe after a failed try and garbageCollection
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pipe := OperatingSystem makePipe. |
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156 |
pipe isNil ifTrue:[ |
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"/ ok, maybe someone has forgotten to close a stream; enforce finalization and try again |
158 |
'makePipe: enforcing finalization to close any open streams' infoPrintCR. |
|
12708 | 159 |
ObjectMemory garbageCollect; finalize. |
12684 | 160 |
pipe := OperatingSystem makePipe. |
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161 |
]. |
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162 |
|
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163 |
pipe notNil ifTrue:[ |
12708 | 164 |
rs := self forFileDescriptor:(pipe at:1) mode:#readonly buffered:false handleType:#pipeFilePointer. |
165 |
ws := self forFileDescriptor:(pipe at:2) mode:#writeonly buffered:false handleType:#pipeFilePointer. |
|
12684 | 166 |
^ Array with:rs with:ws |
11907
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167 |
]. |
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168 |
^ nil |
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|
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" |
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|pipe rs ws| |
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172 |
|
7541 | 173 |
pipe := NonPositionableExternalStream makePipe. |
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174 |
rs := pipe at:1. |
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175 |
ws := pipe at:2. |
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176 |
|
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177 |
'read ...'. |
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178 |
[ |
12684 | 179 |
1 to:10 do:[:i | |
180 |
Transcript showCR:rs nextLine |
|
181 |
]. |
|
182 |
rs close. |
|
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183 |
] forkAt:7. |
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184 |
|
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'write ...'. |
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186 |
[ |
12684 | 187 |
1 to:10 do:[:i | |
188 |
ws nextPutAll:'hello world '; nextPutAll:i printString; cr |
|
189 |
]. |
|
190 |
ws close. |
|
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191 |
] fork. |
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" |
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193 |
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194 |
"Modified: 29.2.1996 / 18:28:36 / cg" |
613 | 195 |
! ! |
196 |
||
197 |
!NonPositionableExternalStream methodsFor:'error handling'! |
|
198 |
||
199 |
positionError |
|
2965 | 200 |
"{ Pragma: +optSpace }" |
201 |
||
613 | 202 |
"notify that this stream has no concept of a position" |
203 |
||
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^ PositionError raiseRequestWith:self |
4559 | 205 |
|
206 |
" |
|
207 |
Stderr positionError |
|
208 |
" |
|
613 | 209 |
! ! |
210 |
||
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!NonPositionableExternalStream methodsFor:'initialization'! |
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|
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213 |
initialize |
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"non-positionalble streams do now work well when buffered" |
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|
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216 |
super initialize. |
15922 | 217 |
buffered := false. |
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! ! |
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!NonPositionableExternalStream methodsFor:'non homogenous reading'! |
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nextBytes:count into:anObject startingAt:start |
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"read the next count bytes into an object and return the number of |
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bytes read or the number of bytes read, if EOF is encountered before. |
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An exception is raised if the connection is broken. |
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|
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Redefined here to avoid blocking of ST/X when waiting for io. |
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Instead only the calling thread will block" |
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229 |
|
8815 | 230 |
|remaining offset nRead| |
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232 |
count == 0 ifTrue:[ |
10327 | 233 |
^ 0. |
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]. |
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parents:
7682
diff
changeset
|
236 |
remaining := count. |
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
237 |
offset := start. |
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
238 |
|
10327 | 239 |
[ |
240 |
nRead := self nextAvailableBytes:remaining into:anObject startingAt:offset. |
|
241 |
nRead == 0 ifTrue:[ |
|
242 |
"atEnd does a readWait" |
|
243 |
self atEnd not. |
|
244 |
] ifFalse:[ |
|
245 |
remaining := remaining - nRead. |
|
246 |
offset := offset + nRead. |
|
247 |
remaining ~~ 0. |
|
248 |
] |
|
7861
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
249 |
] whileTrue. |
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
250 |
|
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
251 |
^ count - remaining |
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
252 |
! ! |
9c2cd42e4667
Provide a #nextBytes:into:startingAt: that does not block the whole ST/X
Stefan Vogel <sv@exept.de>
parents:
7682
diff
changeset
|
253 |
|
613 | 254 |
!NonPositionableExternalStream methodsFor:'positioning'! |
255 |
||
256 |
position |
|
2965 | 257 |
"{ Pragma: +optSpace }" |
258 |
||
613 | 259 |
"catch position - there is none here" |
260 |
||
261 |
^ self positionError |
|
1 | 262 |
! |
263 |
||
613 | 264 |
position:aPosition |
2965 | 265 |
"{ Pragma: +optSpace }" |
266 |
||
613 | 267 |
"catch position - there is none here" |
268 |
||
269 |
^ self positionError |
|
270 |
! |
|
44 | 271 |
|
613 | 272 |
skip:numberToSkip |
7241 | 273 |
"skip count bytes/characters, return the receiver. |
274 |
Re-redefined since PositionableStream redefined it." |
|
613 | 275 |
|
16207
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
276 |
"don't know how to unread ..." |
613 | 277 |
numberToSkip < 0 ifTrue:[ |
16207
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
278 |
PositionError raiseRequest. |
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
279 |
^ self |
88 | 280 |
]. |
16207
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
281 |
numberToSkip timesRepeat:[self next]. |
4467 | 282 |
|
283 |
"Modified: / 30.7.1999 / 12:42:12 / cg" |
|
1 | 284 |
! ! |
285 |
||
177 | 286 |
!NonPositionableExternalStream methodsFor:'printing & storing'! |
287 |
||
288 |
printOn:aStream |
|
2965 | 289 |
"{ Pragma: +optSpace }" |
290 |
||
4392 | 291 |
"append a user printed representation of the receiver to aStream. |
292 |
The format is suitable for a human - not meant to be read back." |
|
177 | 293 |
|
2965 | 294 |
|myName| |
295 |
||
177 | 296 |
self == Stdin ifTrue:[ |
10327 | 297 |
myName := 'Stdin'. |
2965 | 298 |
] ifFalse:[ |
10327 | 299 |
self == Stdout ifTrue:[ |
300 |
myName := 'Stdout'. |
|
301 |
] ifFalse:[ |
|
302 |
self == Stderr ifTrue:[ |
|
303 |
myName := 'Stderr'. |
|
304 |
] |
|
305 |
] |
|
177 | 306 |
]. |
2965 | 307 |
|
308 |
myName notNil ifTrue:[ |
|
10327 | 309 |
aStream nextPutAll:myName. |
310 |
^ self |
|
177 | 311 |
]. |
312 |
super printOn:aStream |
|
313 |
! |
|
314 |
||
315 |
storeOn:aStream |
|
2965 | 316 |
"{ Pragma: +optSpace }" |
317 |
||
213 | 318 |
"append a printed representation of the receiver on aStream, from |
319 |
which the receiver can be reconstructed." |
|
177 | 320 |
|
321 |
((self == Stdin) |
|
322 |
or:[self == Stdout |
|
323 |
or:[self == Stderr]]) ifTrue:[ |
|
324 |
^ self printOn:aStream |
|
325 |
]. |
|
326 |
super storeOn:aStream |
|
327 |
! ! |
|
328 |
||
613 | 329 |
!NonPositionableExternalStream methodsFor:'private'! |
360 | 330 |
|
5407 | 331 |
handleForStderr |
332 |
"{ Pragma: +optSpace }" |
|
333 |
||
334 |
"return a stderr handle" |
|
335 |
||
336 |
%{ |
|
10327 | 337 |
#ifdef WIN32 |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
338 |
RETURN ( __MKEXTERNALADDRESS( __win32_stderr() )); |
10327 | 339 |
#else |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
340 |
RETURN ( __MKEXTERNALADDRESS(stderr) ); |
10327 | 341 |
#endif |
5407 | 342 |
%} |
343 |
! |
|
344 |
||
345 |
handleForStdin |
|
346 |
"{ Pragma: +optSpace }" |
|
347 |
||
348 |
"return a stdin handle" |
|
349 |
||
350 |
%{ |
|
10327 | 351 |
#ifdef WIN32 |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
352 |
RETURN ( __MKEXTERNALADDRESS( __win32_stdin() )); |
10327 | 353 |
#else |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
354 |
RETURN ( __MKEXTERNALADDRESS(stdin) ); |
10327 | 355 |
#endif |
5407 | 356 |
%} |
357 |
! |
|
358 |
||
359 |
handleForStdout |
|
360 |
"{ Pragma: +optSpace }" |
|
361 |
||
362 |
"return a stdout handle" |
|
363 |
||
364 |
%{ |
|
10327 | 365 |
#ifdef WIN32 |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
366 |
RETURN ( __MKEXTERNALADDRESS( __win32_stdout() )); |
10327 | 367 |
#else |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
368 |
RETURN ( __MKEXTERNALADDRESS(stdout) ); |
10327 | 369 |
#endif |
5407 | 370 |
%} |
371 |
! |
|
372 |
||
613 | 373 |
initializeForStderr |
2965 | 374 |
"{ Pragma: +optSpace }" |
375 |
||
613 | 376 |
"setup for writing to stderr" |
269 | 377 |
|
613 | 378 |
mode := #readwrite. |
379 |
buffered := false. |
|
12395
1db7ea277c93
filePointer -> handle migration
Claus Gittinger <cg@exept.de>
parents:
11907
diff
changeset
|
380 |
handle := self handleForStderr. |
12754 | 381 |
handleType := #filePointer. |
5407 | 382 |
OperatingSystem isMSWINDOWSlike ifTrue:[ |
12754 | 383 |
eolMode := #crlf |
5407 | 384 |
] |
613 | 385 |
! |
1 | 386 |
|
387 |
initializeForStdin |
|
2965 | 388 |
"{ Pragma: +optSpace }" |
389 |
||
44 | 390 |
"setup for reading stdin" |
391 |
||
1 | 392 |
mode := #readonly. |
6843
ef53f65b7364
stdout/err must not be buffered (sending prompts without NL)
Claus Gittinger <cg@exept.de>
parents:
5918
diff
changeset
|
393 |
"/ buffered := true. |
ef53f65b7364
stdout/err must not be buffered (sending prompts without NL)
Claus Gittinger <cg@exept.de>
parents:
5918
diff
changeset
|
394 |
buffered := false. |
12754 | 395 |
handleType := #filePointer. |
12395
1db7ea277c93
filePointer -> handle migration
Claus Gittinger <cg@exept.de>
parents:
11907
diff
changeset
|
396 |
handle := self handleForStdin. |
1 | 397 |
! |
398 |
||
399 |
initializeForStdout |
|
2965 | 400 |
"{ Pragma: +optSpace }" |
401 |
||
44 | 402 |
"setup for writing to stdout" |
403 |
||
1 | 404 |
mode := #readwrite. |
10 | 405 |
buffered := false. |
12395
1db7ea277c93
filePointer -> handle migration
Claus Gittinger <cg@exept.de>
parents:
11907
diff
changeset
|
406 |
handle := self handleForStdout. |
12754 | 407 |
handleType := #filePointer. |
5407 | 408 |
OperatingSystem isMSWINDOWSlike ifTrue:[ |
12754 | 409 |
eolMode := #crlf |
5407 | 410 |
] |
1 | 411 |
! |
412 |
||
413 |
reOpen |
|
2965 | 414 |
"{ Pragma: +optSpace }" |
415 |
||
44 | 416 |
"reopen the stream after an image restart. |
417 |
If I am one of the standard streams, reopen is easy" |
|
1 | 418 |
|
477
8710aba7876b
oops - making id's real objects requires a store macro
Claus Gittinger <cg@exept.de>
parents:
475
diff
changeset
|
419 |
(self == StdInStream) ifTrue:[ |
177 | 420 |
^ self initializeForStdin |
1 | 421 |
]. |
477
8710aba7876b
oops - making id's real objects requires a store macro
Claus Gittinger <cg@exept.de>
parents:
475
diff
changeset
|
422 |
(self == StdOutStream) ifTrue:[ |
177 | 423 |
^ self initializeForStdout |
1 | 424 |
]. |
477
8710aba7876b
oops - making id's real objects requires a store macro
Claus Gittinger <cg@exept.de>
parents:
475
diff
changeset
|
425 |
(self == StdErrorStream) ifTrue:[ |
177 | 426 |
^ self initializeForStderr |
1 | 427 |
]. |
428 |
^ super reOpen |
|
429 |
! ! |
|
613 | 430 |
|
431 |
!NonPositionableExternalStream methodsFor:'queries'! |
|
432 |
||
5851
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
433 |
atEnd |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
434 |
"return true, if position is at end" |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
435 |
|
5918 | 436 |
(self == StdInStream) ifTrue:[ |
437 |
OperatingSystem hasConsole ifFalse:[ |
|
438 |
^ true |
|
439 |
] |
|
440 |
]. |
|
441 |
||
5851
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
442 |
"first, wait to avoid blocking on the read. |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
443 |
On end of stream or error, readWait will return" |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
444 |
|
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
445 |
self readWait. |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
446 |
^ super atEnd. |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
447 |
! |
6823cc642d60
only do readWait for pipes and sockets.
Claus Gittinger <cg@exept.de>
parents:
5407
diff
changeset
|
448 |
|
5407 | 449 |
isPositionable |
450 |
"return true, if the stream supports positioning (this one is not)" |
|
451 |
||
452 |
^ false |
|
11455 | 453 |
! |
454 |
||
12395
1db7ea277c93
filePointer -> handle migration
Claus Gittinger <cg@exept.de>
parents:
11907
diff
changeset
|
455 |
size |
11455 | 456 |
"we do not know our size" |
457 |
||
458 |
^ self positionError |
|
613 | 459 |
! ! |
460 |
||
10349
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
461 |
!NonPositionableExternalStream methodsFor:'reading'! |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
462 |
|
14758
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
463 |
next |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
464 |
"return the next element, if available. |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
465 |
If nothing is available, this does never raise a read-beyond end signal. |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
466 |
Instead, nil is returned immediately. |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
467 |
|
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
468 |
Redefined, to wait on pipes and sockets" |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
469 |
|
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
470 |
self readWait. |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
471 |
^ super next |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
472 |
! |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
473 |
|
15796
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
474 |
nextLine |
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
475 |
"Redefined, to wait on pipes and sockets" |
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
476 |
|
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
477 |
self readWait. |
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
478 |
^ super nextLine |
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
479 |
! |
b3fdd3c2aec2
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15720
diff
changeset
|
480 |
|
10349
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
481 |
nextOrNil |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
482 |
"like #next, this returns the next element, if available. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
483 |
If nothing is available, this does never raise a read-beyond end signal. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
484 |
Instead, nil is returned immediately. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
485 |
|
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
486 |
Redefined, to wait on pipes and sockets" |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
487 |
|
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
488 |
self atEnd ifTrue:[^ nil]. |
14758
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
489 |
^ super nextOrNil |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
490 |
! |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
491 |
|
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
492 |
peek |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
493 |
"Redefined, to wait on pipes and sockets" |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
494 |
|
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
495 |
self readWait. |
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
496 |
^ super peek |
10349
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
497 |
! |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
498 |
|
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
499 |
peekOrNil |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
500 |
"like #peek, this returns the next element, if available. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
501 |
If nothing is available, this does never raise a read-beyond end signal. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
502 |
Instead, nil is returned immediately. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
503 |
|
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
504 |
Redefined, to wait on pipes and sockets" |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
505 |
|
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
506 |
self atEnd ifTrue:[^ nil]. |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
507 |
^ self peek |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
508 |
! ! |
cbfa00bba11d
Speedup ExternalStream>>#nextOrNil and ExternalStream>>#peekOrNil.
Stefan Vogel <sv@exept.de>
parents:
10327
diff
changeset
|
509 |
|
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
510 |
!NonPositionableExternalStream methodsFor:'writing'! |
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
511 |
|
7679 | 512 |
nextPutBytes:initialWriteCount from:buffer startingAt:initialOffset |
513 |
"redefined, to wait until stream is writable, to avoid blocking in a write" |
|
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
514 |
|
7682
5d43745f59ac
only do a writeWait if previous non-blocking write failed to
Claus Gittinger <cg@exept.de>
parents:
7679
diff
changeset
|
515 |
|count offset remaining wasBlocking| |
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
516 |
|
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
517 |
offset := initialOffset. |
7679 | 518 |
remaining := initialWriteCount. |
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
519 |
|
7679 | 520 |
wasBlocking := self blocking:false. |
10327 | 521 |
[remaining ~~ 0] whileTrue:[ |
15919
96f6c9fb9f7a
Initialize in instance initialize method insted in #new
Stefan Vogel <sv@exept.de>
parents:
15796
diff
changeset
|
522 |
count := super nextPutBytes:remaining from:buffer startingAt:offset. |
15924
73f0da45e706
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
15922
diff
changeset
|
523 |
count ~~ remaining ifTrue:[ "Transcript showCR:'writeWait'. "self writeWait. ]. |
7682
5d43745f59ac
only do a writeWait if previous non-blocking write failed to
Claus Gittinger <cg@exept.de>
parents:
7679
diff
changeset
|
524 |
|
15919
96f6c9fb9f7a
Initialize in instance initialize method insted in #new
Stefan Vogel <sv@exept.de>
parents:
15796
diff
changeset
|
525 |
remaining := remaining - count. |
96f6c9fb9f7a
Initialize in instance initialize method insted in #new
Stefan Vogel <sv@exept.de>
parents:
15796
diff
changeset
|
526 |
offset := offset + count. |
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
527 |
]. |
7679 | 528 |
wasBlocking ifTrue:[self blocking:true]. |
529 |
||
7497
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
530 |
^ offset - initialOffset. |
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
531 |
! ! |
cc29afd51151
Do not block when writing to pipes
Stefan Vogel <sv@exept.de>
parents:
7241
diff
changeset
|
532 |
|
1295 | 533 |
!NonPositionableExternalStream class methodsFor:'documentation'! |
534 |
||
535 |
version |
|
16207
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
536 |
^ '$Header: /cvs/stx/stx/libbasic/NonPositionableExternalStream.st,v 1.69 2014-03-05 10:00:26 stefan Exp $' |
12677
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
537 |
! |
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
538 |
|
aeab74b04f0b
Use __MKEXTERNALADDRESS() instead of __MKOBJ()
Stefan Vogel <sv@exept.de>
parents:
12395
diff
changeset
|
539 |
version_CVS |
16207
923f92b4f0e8
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
16187
diff
changeset
|
540 |
^ '$Header: /cvs/stx/stx/libbasic/NonPositionableExternalStream.st,v 1.69 2014-03-05 10:00:26 stefan Exp $' |
1295 | 541 |
! ! |
14758
6a70a7006093
class: NonPositionableExternalStream
Stefan Vogel <sv@exept.de>
parents:
12754
diff
changeset
|
542 |