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From: rfinch@caldwr.UUCP (Ralph Finch)
Newsgroups: comp.unix.questions
Subject: Re: cascading pipes in awk
Summary: upper to lower case
Keywords: awk
Message-ID: <496@caldwr.UUCP>
Date: 25 May 89 15:12:20 GMT
References: <813@manta.NOSC.MIL>
Distribution: usa
Organization: California Department of Water Resources
Lines: 41

In article <813@manta.NOSC.MIL>, psm@manta.NOSC.MIL (Scot Mcintosh) writes:
> Is there a way to cascade pipes in awk? I'm trying to do something
> like the following:
>     { print | "tr [a-z] [A-Z]" | <<other stuff that will manipulate the
> 				   now-upper-case text >>
>     }
> 
> Any other suggestions to accomplish the same thing would be
> appreciated.

I'm also frustrated that awk doesn't allow the use of Unix utilities
inside of awk.

I had a similar problem that Scot did (only I wanted to go from upper
to lower case).  Here was my solution:

name_up="UPPERCASENAME"

# create upper-to-lower table
for (i=65;i<=90;i++) {
	up=sprintf("%c",i)
	lw=sprintf("%c",i+32)
	alpha[up]=lw
}
# preserve punctuation characters
for (i=32;i<=64;i++) {
	c=sprintf("%c",i)
	alpha[c]=c
}
for (i=91;i<=126;i++) {
	c=sprintf("%c",i)
	alpha[c]=c
}

# translate the name from upper-to-lower case
name_low=""
for (i=1; i<=length(name_up); i++)
	name=name""alpha[substr(name_up,i,1)]
-- 
Ralph Finch
...ucbvax!ucdavis!caldwr!rfinch