#!/usr/bin/env bash

# @(#) s1	Demonstrate match with start-2 .. end, cgrep
# Utility cgrep source:
# http://sourceforge.net/projects/cgrep/ (verified 2015.11.12)

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C cgrep

# Set beginning and end patterns.
START="^Srt"
END="^End"

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

pl " Results, start=$START, end=$END, expected output to results:"
cgrep -D -2 +w "$END" "$START" $FILE > f1
paste expected-output.txt f1 |
expand -30

exit 0

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian 5.0.8 (lenny, workstation) 
bash GNU bash 3.2.39
cgrep ATT cgrep 8.15

-----
 Input data file data1:
1
2
3
4
5
B4Srt1--Variable-0000
B4Srt2--Variable-1111
Srt
6
7
8
9
10
End
11
12
13
B4Srt1-Variable-12361
B4Srt2-Variable-68931
Srt
14
15
End

-----
 Results, start=^Srt, end=^End, expected output to results:
B4Srt1--Variable-0000         B4Srt1--Variable-0000
B4Srt2--Variable-1111         B4Srt2--Variable-1111
Srt                           Srt
6                             6
7                             7
8                             8
9                             9
10                            10
End                           End
B4Srt1-Variable-12361         B4Srt1-Variable-12361
B4Srt2-Variable-68931         B4Srt2-Variable-68931
Srt                           Srt
14                            14
15                            15
End                           End

      gogrep   0.07   0.18   0.09     2.57     1.00      1.00     2.25
       cgrep   0.15   0.31   0.14     2.07     2.14      1.72     3.50
        grep   0.15   0.24   0.08     1.60     2.14      1.33     2.00