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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, [email protected], 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)
}