##Eskil Plugin
# Example file for a plugin.
# A plugin must start with the exact first line as this one.
# This plugin implements case insensitive matching, corresponding to the
# -nocase flag.
# A plugin must define this procedure to do the job.
# side: left or right
# chi: An input channel for reading the original file.
# cho: An output channel for writing the processed file.
proc PreProcess {side chi cho} {
while {1} {
# Read data in large chunks for speed
set data [read $chi 100000]
if {$data eq ""} break
# Use lower case for comparison, thus getting case insensitive
puts -nonewline $cho [string tolower $data]
}
# Signal that the file after processing should be used only for
# comparison, not for displaying.
# The processed file must match the original line-wise.
return 0
}