Re: for S'Image use Func??

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Tue, 11 May 2010 09:34:42 +0200, Niklas Holsti  
<niklas.holsti@tidorum.invalid> a écrit:
> Yes, with one problem, which is that it is hard (that is, I don't know  
> how) to detect when the very last line in the input file is null. This  
> is because End_Of_Line returns true also at end of file, and End_Of_File  
> returns true also when the data remaining in the file is an end-of-line  
> (and end-of-page) before the true end of file. One consequence is that a  
> truly empty file (like /dev/null) looks the same as a file with one null  
> line (like echo "").
This may be "hard" only with the Standard_Input file, which is a  
Text_IO.File_Type, and Text_IO, as previously said, is a file of lines. A  
file of line, as you shown you know, is a file where each is line strictly  
delimited in platform dependent manner (with LF on UNIX, CR+LF on Windows  
and CR on Mac, or with specific chunks or records on some other systems).  
So obviously, each line is expected to have an end, just like each file  
have an end, and the end of the last line is also the end of a file, if  
the file is a file of line. Just like a file of some kind of records ends  
with the end of the last record.

I was to say this is a matter only with Standard_Input, and in the context  
of "/dev/null" which you gave, you have no need to open "/dev/null" as a  
file of lines if have no reason to think "/dev/null" is indeed a file of  
lines.

To talk about text files now : let say most of them are just  
inconsistently formated, as many text files as produced by text editors,  
are not formated in the constant way : the last line oftenly lacks a  
delimiter for the last line. This files are either invalid files of lines  
or else are not files of lines, depending on your requirement.

If your requirements states that a line is a sequence of character  
terminated by a CR+LF or an LF or a CR, then, the file you need is a file  
of characters, so don't open these files as file of lines, better as file  
of characters instead.

The only remaining case is the one of the standard input.

-- 
No-no, this isn't an oops ...or I hope (TM) - Don't blame me... I'm just  
not lucky