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############################################################################
#
# File: diffsort.icn
#
# Subject: Program to reorder "diff" output
#
# Author: Gregg M. Townsend
#
# Date: May 31, 1994
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# Usage: diffsort [file]
#
# Diffsort reorders the output from the Unix "diff" program by moving
# one-line entries such as "Common subdirectory ..." and "Only in ..."
# to the front of the output file and sorting them. Actual difference
# records then follow, in the original order, separated by lines of
# equal signs.
#
############################################################################
global clines # comment lines
global dlines # diff lines
## main program
procedure main(args)
clines := []
dlines := []
if *args > 0 then
every dofile(!args)
else
dofile()
every write(!sort(clines))
every write(!dlines)
end
## dofile(fname) - process one named file, or standard input if unnamed
procedure dofile(fname)
local f, separator
if /fname then
f := &input
else
f := open(fname) | stop("can't open ", fname)
separator := "\n\n" || repl("=", 78) || "\n\n"
every !f ? {
if any(&ucase) then
put(clines, &subject)
else {
if ="diff " then
put(dlines, separator)
put(dlines, &subject)
}
}
close(f)
return
end
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