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