From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Pietro Gagliardi <pietro10@mac.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
In-reply-to: <20080710185217.6F0201E8C22@holo.morphisms.net>
Date: Thu, 10 Jul 2008 16:18:13 -0400
References: <20080710185217.6F0201E8C22@holo.morphisms.net>
Subject: Re: [9fans] Bgetrune while(i>runesize) loop
Topicbox-Message-UUID: e27d80d4-ead3-11e9-9d60-3106f5b1d025

I got nothing spectacular from that, but changing the \x00s to QRS
gave me something interesting: without the loop, readrune gives me
[?]S, but with it it, it gives me [?]QRS, like cat would've.

Would this be because fullrune doesn't check for validity, and if
chartorune fails then the possibility of eating too much comes about?

On Jul 10, 2008, at 2:53 PM, Russ Cox wrote:

>> Hello. I was looking at the code for the Bgetrune function trying to
>> implement a readrune() around read(). It works, but without a
>> counterpart for this:
>>
>> 		while(i > bp->runesize) {
>> 			Bungetc(bp);
>> 			i--;
>> 		}
>>
>> What is the point of that loop? Thanks.
>
> Use "\xE0\x00\x00" as your input and you will find out.
>
> Russ
>
>