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tcl::transform::adler32(3tcl) Reflected/virtual channel support tcl::transform::adler32(3tcl)
 


NAME

tcl::transform::adler32 - Adler32 transformation

SYNOPSIS

package require Tcl 8.6


package require tcl::transform::core ?1?


package require tcl::transform::adler32 ?1?


::tcl::transform::adler32 chan -option value...





 


DESCRIPTION

The tcl::transform::adler32 package provides a command creating a channel
  transformation which passes the read and written bytes through unchanged (like
  tcl::transform::identity), but additionally continuously computes the
  adler32 checksums of the data it has seen for each direction and stores them
  in Tcl variables specified at construction time.


Related transformations in this module are tcl::transform::counter,
  tcl::transform::crc32, tcl::transform::identity, and
  tcl::transform::observe.


The internal TclOO class implementing the transform handler is a
  sub-class of the tcl::transform::core framework.

API



  
::tcl::transform::adler32 chan -option
    value...

  
This command creates an adler32 checksumming transformation on top of the
      channel chan and returns its handle. The accepted options are







  
-read-variable varname

  
The value of the option is the name of a global or namespaced variable,
      the location where the transformation has to store the adler32 checksum of
      the data read from the channel.
    

    If not specified, or the empty string, the checksum of the read direction is
      not saved.





  
-write-variable varname

  
The value of the option is the name of a global or namespaced variable,
      the location where the transformation has to store the adler32 checksum of
      the data written to the channel.
    

    If not specified, or the empty string, the checksum of the write direction
      is not saved.






BUGS, IDEAS, FEEDBACK

This document, and the package it describes, will undoubtedly contain bugs and
  other problems. Please report such in the category virtchannel of the
  Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist]. Please also
  report any ideas for enhancements you may have for either package and/or
  documentation.

KEYWORDS

adler32, channel transformation, checksum, reflected channel, tip 230,
  transformation, virtual channel

CATEGORY

Channels

COPYRIGHT


Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>








  

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