TCL - file problem 1

[lakshmivaragan]

Hi,
When TCL variables are used for writing a file, the record length varies. This seems to be problem when:
1. Random access to records. Since record size varies we can't use tell or seek to point to any of the records and get it.
2. Rewrite a file. If I try to rewrite file with value larger than the previously written value it affects the next record.

Is there any way in TCL so that files can be written with uniform record length ?

Thanx
Lax

 

[ulis]

If you want all your records of same length and right padded:
puts $fp [format %-200s $record]

For more on format:

http://mini.net/tcl/format

HTH

ulis

 

[AviaTraining]

Actually, if you want to ensure that each record is exactly 200 characters, you'll also want to truncate values that exceed 200 characters. The conversion specifier [tt]%-200s[/tt] will space-pad out to at least 200 characters, but not truncate longer values. The conversion specifier [tt]%-200.200s[/tt] will truncate longer strings to exactly 200 characters.

- Ken Jones, President, ken@avia-training.com
Avia Training and Consulting,

http://www.avia-training.com

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