1tcl::transform::adler32(Rne)flected/virtual channel supptocrlt::transform::adler32(n)
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NAME

8       tcl::transform::adler32 - Adler32 transformation
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SYNOPSIS

11       package require Tcl  8.6
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13       package require tcl::transform::core  ?1?
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15       package require tcl::transform::adler32  ?1?
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17       ::tcl::transform::adler32 chan -option value...
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DESCRIPTION

22       The tcl::transform::adler32 package provides a command creating a chan‐
23       nel transformation which passes the read and written bytes through  un‐
24       changed  (like tcl::transform::identity), but additionally continuously
25       computes the adler32 checksums of the data it has seen for each  direc‐
26       tion and stores them in Tcl variables specified at construction time.
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28       Related  transformations  in  this  module are tcl::transform::counter,
29       tcl::transform::crc32,   tcl::transform::identity,   and    tcl::trans‐
30       form::observe.
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32       The  internal  TclOO class implementing the transform handler is a sub-
33       class of the tcl::transform::core framework.
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API

36       ::tcl::transform::adler32 chan -option value...
37              This command creates an adler32 checksumming  transformation  on
38              top of the channel chan and returns its handle. The accepted op‐
39              tions are
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41              -read-variable varname
42                     The value of the option is the name of a global or names‐
43                     paced variable, the location where the transformation has
44                     to store the adler32 checksum of the data read  from  the
45                     channel.
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47                     If  not  specified,  or the empty string, the checksum of
48                     the read direction is not saved.
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50              -write-variable varname
51                     The value of the option is the name of a global or names‐
52                     paced variable, the location where the transformation has
53                     to store the adler32 checksum of the data written to  the
54                     channel.
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56                     If  not  specified,  or the empty string, the checksum of
57                     the write direction is not saved.
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BUGS, IDEAS, FEEDBACK

60       This document, and the package it describes, will  undoubtedly  contain
61       bugs  and other problems.  Please report such in the category virtchan‐
62       nel  of  the  Tcllib  Trackers  [http://core.tcl.tk/tcllib/reportlist].
63       Please  also  report any ideas for enhancements you may have for either
64       package and/or documentation.
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66       When proposing code changes, please provide unified diffs, i.e the out‐
67       put of diff -u.
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69       Note  further  that  attachments  are  strongly  preferred over inlined
70       patches. Attachments can be made by going  to  the  Edit  form  of  the
71       ticket  immediately  after  its  creation, and then using the left-most
72       button in the secondary navigation bar.
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KEYWORDS

75       adler32, channel transformation, checksum, reflected channel, tip  230,
76       transformation, virtual channel
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CATEGORY

79       Channels
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82       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>
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87tcllib                                 1            tcl::transform::adler32(n)
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