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Date: Mon, 16 Feb 2009 21:36:01 +0100
From: Thomas Locke <thomas@kenshi.dk>
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Newsgroups: comp.lang.ada
Subject: C getchar() functionality in Ada
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Date: 2009-02-16T21:36:01+01:00
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Hey all,

I've started redoing all the K&R C examples in Ada, and I've already hit 
a wall that I'm not able to get around.

I have this C program:  http://pastebin.com/fbc6bec5

It's very simple, but still I fail to mimick it in Ada.

The C program happily accepts everything I throw at it, and it responds 
with the expected values, whereas my Ada version(s) either fail at 
linefeeds, throw End_Error exceptions at me, or spits out too many 
linefeeds!

My current Ada code looks like this: http://pastebin.com/f519f7e37

This version works with input from keyboard and when I pipe some data 
into it like this:  $ echo "FooBar" | ito

It craps out on files ($ cat SomeFile | ito), where it ignores linefeeds 
and throws End_Error exceptions at me when the last character in the 
file is a linefeed

I've tried with Get_Immediate, Look_Ahead, Get_Line and a mixture of 
Strings, Characters and Unbounded strings. I just can't make it work.

Any and all advice are more than welcome.

:o)
/Thomas