Root/lib/raid6/unroll.awk

1
2# This filter requires one command line option of form -vN=n
3# where n must be a decimal number.
4#
5# Repeat each input line containing $$ n times, replacing $$ with 0...n-1.
6# Replace each $# with n, and each $* with a single $.
7
8BEGIN {
9    n = N + 0
10}
11{
12    if (/\$\$/) { rep = n } else { rep = 1 }
13    for (i = 0; i < rep; ++i) {
14        tmp = $0
15        gsub(/\$\$/, i, tmp)
16        gsub(/\$\#/, n, tmp)
17        gsub(/\$\*/, "$", tmp)
18        print tmp
19    }
20}
21

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