Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.lang.c
Subject: Re: Buffer contents well-defined after fgets() reaches EOF ?
Date: Sun, 9 Feb 2025 18:34:55 +0100
Organization: A noiseless patient Spider
Lines: 29
Message-ID: <voaovv$ocot$1@dont-email.me>
References: <vo9g74$fu8u$1@dont-email.me> <vo9hlo$g0to$1@dont-email.me>
 <vo9ki6$gib5$1@dont-email.me> <voahgv$mdud$2@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Injection-Date: Sun, 09 Feb 2025 18:34:56 +0100 (CET)
Injection-Info: dont-email.me; posting-host="2863fb45892f80e3bb8d5dd8ab68d22c";
	logging-data="799517"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19BX04c5Yf//xuTJ3FDEeTF"
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
 Thunderbird/45.8.0
Cancel-Lock: sha1:6ia4LX/mLAsgjVpGqRTOGiqLB74=
In-Reply-To: <voahgv$mdud$2@dont-email.me>
X-Enigmail-Draft-Status: N1110
Bytes: 2132

On 09.02.2025 16:27, Andrey Tarasevich wrote:
> On Sat 2/8/2025 11:13 PM, Janis Papanagnou wrote:
>> But now I wanted to ignore all data that I got for fgets() != NULL
>> in the loop. And I hoped that *after* the loop the last read data is
>> still valid.
> 
> As Michael already noted it depends on what you consider as the last
> piece of valid data in your file.

I have a strong opinion of a text file concerning line terminators;
I answered that in my reply Michael.

> Say, what do you want to see as "the
> last line" in a file that ends with
> 
>   abracadabra\n<EOF here>
> 
> ?
> 
> Is "abracadabra" the last line? Or is the last line supposed to be empty
> in this case?

If "\n" is a string literal (2 characters, '\' and 'n') then it's an
incomplete line (as to my standards), if it's meant as a <LF> control
character then it's complete. (Similar with <CR> on old Apple/Macs and
<CR><LF> on DOS-alike systems.)

Janis