1 files changed, 46 insertions, 0 deletions
diff --git a/awklib/eg/prog/translate.awk b/awklib/eg/prog/translate.awk
new file mode 100644
index 00000000..6e9aa5a5
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+++ b/awklib/eg/prog/translate.awk
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+# translate --- do tr like stuff
+# Arnold Robbins, arnold@gnu.ai.mit.edu, Public Domain
+# August 1989
+
+# 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, t_ar, i, c)
+{
+    lf = length(from)
+    lt = length(to)
+    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 <= lf; i++) {
+        c = substr(from, i, 1)
+        if (index(target, c) > 0)
+            gsub(c, t_ar[c], target)
+    }
+    return target
+}
+
+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
+}