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#! /bin/sed -f
# sort.sed -- implementing selection sort with sed
#
# $Id: sort.sed,v 1.3 1998/07/07 12:31:49 cdua Exp cdua $
# Carlos Duarte, 970529
# How does this work?
#
# o first all lines are joined in this format
#
# \na line_a \nA
# \nb line_b \nB
# \nl next_line \nL
# \nl next_line \nL
# ...
#
# o general markers are of the form \n<letter> (and a \n can not appear alone)
#
# o the following algorithm is used:
#
# start at 2
# 1. a = a+1
# 2. a at end? yes: exit, no: continue
# 3. make b = a+1
# 4. sort a vs b
# 5. b at end? yes: goto 1; no: continue
# 6. b = b+1; goto 4
#
# o the sorting by itself is done this way:
#
# . after isolating the line a and b, add a table, with order we want
# . then match the initial common part of both lines, for instance
# line_a: xxxx1
# line_b: xxx22
# it would store xxx x1 22, i.e. common rest_of_a rest_of_b
# . if the RE \(first_char_of_a\) \(first_char_of_b\) \1.*\2 exist
# then the line is sorted already, do nothing
# . else swap them
#
# (for instance, "a" is \1 "g" is \2, then \1.*\2 exist, because table
# is abcdefg..., but if \1 was "k", then \1.*\2 do not exit on table)
#
#
# setup
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:H
#--------------------------------------------------
H
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:$ !d
#--------------------------------------------------
$ !d
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:g
#--------------------------------------------------
g
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/.//
#--------------------------------------------------
s/.//
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/\\n/&L&l/g
#--------------------------------------------------
s/\n/&L&l/g
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/^/\\\\Na/
#--------------------------------------------------
s/^/\
a/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/\\nL/\\\\NA/
#--------------------------------------------------
s/\nL/\
A/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/$/\\\\NL/
#--------------------------------------------------
s/$/\
L/
# have now: \na ln1 \nA \nl ln2 \nL \nl ln3 \nL ...
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:b start
#--------------------------------------------------
b start
# advance \na .. \nA to next line
i\
COMM::inca
#--------------------------------------------------
:inca
i\
COMM:s/\\(\\na\\)\\(.*\\)\\(\\nA\\)\\(\\n[lb]\\)\\([^\\n]*\\)\\(\\n[LB]\\)/\\4\\2\\6\\1\\5\\3/
#--------------------------------------------------
s/\(\na\)\(.*\)\(\nA\)\(\n[lb]\)\([^\n]*\)\(\n[LB]\)/\4\2\6\1\5\3/
# ln_a is at the end, then sort is over
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM::start
#--------------------------------------------------
:start
i\
COMM:/\\nA$/ b exit
#--------------------------------------------------
/\nA$/ b exit
# b = a+1
i\
COMM:s/\\nb/\\\\Nl/
#--------------------------------------------------
s/\nb/\
l/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/\\nB/\\\\NL/
#--------------------------------------------------
s/\nB/\
L/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/\\(\\na.*\\nA\\)\\nl\\([^\\n]*\\)\\nL/\\1\\\\Nb\\2\\\\NB/
#--------------------------------------------------
s/\(\na.*\nA\)\nl\([^\n]*\)\nL/\1\
b\2\
B/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM::sort
#--------------------------------------------------
:sort
i\
COMM:h
#--------------------------------------------------
h
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/.*\\na\\(.*\\)\\nA.*\\nb\\(.*\\)\\nB.*/\\1\\\\N\\2\\\\N !"#$%\\&()*+,-.\\/0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~/
#--------------------------------------------------
s/.*\na\(.*\)\nA.*\nb\(.*\)\nB.*/\1\
\2\
!"#$%\&()*+,-.\/0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~/
# work on a temp space: common \n rest_a \n rest_b \n table
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/^\\(.*\\)\\(.*\\n\\)\\1\\(.*\\n.*\\)/\\1\\\\N\\2\\3/
#--------------------------------------------------
s/^\(.*\)\(.*\n\)\1\(.*\n.*\)/\1\
\2\3/
# a is empty and b not: keep this order
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:/.*\\n\\n..*\\n/ b keep
#--------------------------------------------------
/.*\n\n..*\n/ b keep
# a is not empty and b is: swap order
i\
COMM:/.*\\n..*\\n\\n/ b swap
#--------------------------------------------------
/.*\n..*\n\n/ b swap
# if RE fail, swap, else keep order..
i\
COMM:/.*\\n\\(.\\).*\\n\\(.\\).*\\n.*\\1.*\\2/ b keep
#--------------------------------------------------
/.*\n\(.\).*\n\(.\).*\n.*\1.*\2/ b keep
i\
COMM::swap
#--------------------------------------------------
:swap
i\
COMM:s/\\(\\n.*\\)\\(\\n.*\\)\\n/\\2\\1\\\\N/
#--------------------------------------------------
s/\(\n.*\)\(\n.*\)\n/\2\1\
/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM::keep
#--------------------------------------------------
:keep
i\
COMM:s/\\(.*\\)\\n\\(.*\\)\\n\\(.*\\)\\n.*/\\1\\2\\\\Nc\\1\\3\\\\Nd/
#--------------------------------------------------
s/\(.*\)\n\(.*\)\n\(.*\)\n.*/\1\2\
c\1\3\
d/
# merge with main buffer
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:G
#--------------------------------------------------
G
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/^\\(.*\\)\\nc\\(.*\\na\\)\\(.*\\)\\(\\nA\\)/\\2\\1\\4/
#--------------------------------------------------
s/^\(.*\)\nc\(.*\na\)\(.*\)\(\nA\)/\2\1\4/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/^\\(.*\\)\\nd\\n\\(.*\\nb\\)\\(.*\\)\\(\\nB\\)/\\2\\1\\4/
#--------------------------------------------------
s/^\(.*\)\nd\n\(.*\nb\)\(.*\)\(\nB\)/\2\1\4/
# b at end?
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:/\\nB$/ b inca
#--------------------------------------------------
/\nB$/ b inca
# nope, then make b = b+1
i\
COMM:s/\\(\\nb\\)\\(.*\\)\\(\\nB\\)\\(\\nl\\)\\([^\\n]*\\)\\(\\nL\\)/\\4\\2\\6\\1\\5\\3/
#--------------------------------------------------
s/\(\nb\)\(.*\)\(\nB\)\(\nl\)\([^\n]*\)\(\nL\)/\4\2\6\1\5\3/
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:b sort
#--------------------------------------------------
b sort
# here: ^ \nl..\nL...\na..\nA $
i\
COMM::exit
#--------------------------------------------------
:exit
i\
COMM:s/\\n[ablA]//g
#--------------------------------------------------
s/\n[ablA]//g
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
i\
COMM:s/\\n[BL]/\\\\N/g
#--------------------------------------------------
s/\n[BL]/\
/g
s/^/PATT:/
l
s/^PATT://
x
s/^/HOLD:/
l
s/^HOLD://
x
# Debugged SED script generated by sedsed (https://aurelio.net/projects/sedsed/)
|
