913 

   914 copy:numberOfBytesOrNil into:outStream bufferSize:bufferSize

   915     "read from the receiver, and write numberOfBytes data to another aWriteStream.

   916      Return the number of bytes which have been transferred.

   917      If nuberOfBytesOrNil is nil, copy until the end of myself.

   918      Redefined to use operating system features to do a fast copy."

   919 

   920     |pos n nWritten|

   921 

   922     outStream isExternalStream ifTrue:[

   923         "sendfile() in Linux does not support any combination of file/pipe/socket fds.

   924          #copyFromFd:toFd:startIndex:count is curently not available in windows."

   925 

   926         pos := self position.

   927         numberOfBytesOrNil isNil ifTrue:[

   928             n := self size - pos.

   929         ] ifFalse:[

   930             n := numberOfBytesOrNil.

   931         ].

   932         nWritten := OperatingSystem

   933                         copyFromFd:self fileHandle

   934                         toFd:outStream fileHandle

   935                         startIndex:pos

   936                         count:n.

   937         nWritten > 0 ifTrue:[

   938             self position:pos+nWritten.

   939         ].

   940         nWritten = n ifTrue:[

   941             ^ self

   942         ].

   943     ].

   944 

   945     "fall back..."

   946     ^ super copy:numberOfBytesOrNil into:outStream bufferSize:bufferSize.

   947 

   948     "

   949      |in out|

   950 

   951      in := 'Make.proto' asFilename readStream.

   952      in copyToEndInto:Stdout.

   953      in close.

   954 

   955      |in out|

   956 

   957      in := 'Make.proto' asFilename readStream.

   958      out := '/tmp/test' asFilename writeStream.

   959      in copyToEndInto:out.

   960      in close. out close.

   961      '/tmp/test' asFilename contents.

   962     "

   963 

   964     "Created: / 13-03-2019 / 16:27:04 / Stefan Vogel"

   965 !