1 files changed, 54 insertions, 0 deletions
diff --git a/awklib/eg/lib/ord.awk b/awklib/eg/lib/ord.awk
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+++ b/awklib/eg/lib/ord.awk
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+# ord.awk --- do ord and chr
+#
+# Global identifiers:
+#    _ord_:        numerical values indexed by characters
+#    _ord_init:    function to initialize _ord_
+#
+# Arnold Robbins
+# arnold@gnu.ai.mit.edu
+# Public Domain
+# 16 January, 1992
+# 20 July, 1992, revised
+
+BEGIN    { _ord_init() }
+function _ord_init(    low, high, i, t)
+{
+    low = sprintf("%c", 7) # BEL is ascii 7
+    if (low == "\a") {    # regular ascii
+        low = 0
+        high = 127
+    } else if (sprintf("%c", 128 + 7) == "\a") {
+        # ascii, mark parity
+        low = 128
+        high = 255
+    } else {        # ebcdic(!)
+        low = 0
+        high = 255
+    }
+
+    for (i = low; i <= high; i++) {
+        t = sprintf("%c", i)
+        _ord_[t] = i
+    }
+}
+function ord(str,    c)
+{
+    # only first character is of interest
+    c = substr(str, 1, 1)
+    return _ord_[c]
+}
+function chr(c)
+{
+    # force c to be numeric by adding 0
+    return sprintf("%c", c + 0)
+}
+#### test code ####
+# BEGIN    \
+# {
+#    for (;;) {
+#        printf("enter a character: ")
+#        if (getline var <= 0)
+#            break
+#        printf("ord(%s) = %d\n", var, ord(var))
+#    }
+# }