52 lines
1.2 KiB
Awk
52 lines
1.2 KiB
Awk
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# translate.awk --- do tr-like stuff
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#
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# Arnold Robbins, arnold@skeeve.com, Public Domain
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# August 1989
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# February 2009 - bug fix
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# Bugs: does not handle things like tr A-Z a-z; it has
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# to be spelled out. However, if `to' is shorter than `from',
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# the last character in `to' is used for the rest of `from'.
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function stranslate(from, to, target, lf, lt, ltarget, t_ar, i, c,
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result)
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{
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lf = length(from)
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lt = length(to)
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ltarget = length(target)
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for (i = 1; i <= lt; i++)
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t_ar[substr(from, i, 1)] = substr(to, i, 1)
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if (lt < lf)
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for (; i <= lf; i++)
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t_ar[substr(from, i, 1)] = substr(to, lt, 1)
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for (i = 1; i <= ltarget; i++) {
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c = substr(target, i, 1)
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if (c in t_ar)
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c = t_ar[c]
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result = result c
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}
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return result
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}
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function translate(from, to)
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{
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return $0 = stranslate(from, to, $0)
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}
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# main program
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BEGIN {
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if (ARGC < 3) {
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print "usage: translate from to" > "/dev/stderr"
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exit
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}
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FROM = ARGV[1]
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TO = ARGV[2]
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ARGC = 2
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ARGV[1] = "-"
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}
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{
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translate(FROM, TO)
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print
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}
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