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How to read a file?

by baylor wetzel · in Torque Game Builder · 05/29/2009 (6:23 pm) · 3 replies

What's the proper way to read all the lines from a file? i'm obviously making some kind of stupid mistake because it never reads the last two lines

function parseFile(%fileFQN)
{
	%file = new FileObject();
	if (!%file.openForRead(%fileFQN))
	{
		error("Can't read file " @ %fileFQN);
	}
	
	for (%line = %file.readLine(); 
		 !%file.isEOF(); 
		 %line = %file.readLine())
	{
		warn(%fileFQN @ ": " @ %line);
		%key   = getWord(%line, 0);
		%value = getWord(%line, 2); 
		warn("key=[" @ %key @ "] value=[" @ %value @ "]");
	}

	%file.close();
}

It can parse this file:
type = shirt
but not the same file without the last (3rd) line (oops, GG's forums automatically strip out the last two blank lines; lines 2 and 3 are just newlines). However, in this example
type = shirt
image = x
thumbnail = y
it prints the first two lines and not the third

i assume my loop check condition is wrong but i'm not sure how to fix it
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Torque 3D Owner baylor wetzel
#1
05/29/2009 (6:52 pm)
Anytime a problem drives me nuts for an hour, i post and suddenly figure out an answer AFTER i post

Not sure what's wrong with the for but it doesn't matter, the better way to do it is with a while statement

while(!%file.isEof())
{
	%line = %file.readLine();
	warn(%fileFQN @ ": " @ %line);  
	%key   = getWord(%line, 0);  
	%value = getWord(%line, 2);   
	warn("key=[" @ %key @ "] value=[" @ %value @ "]");  
}

Torque 3D Owner Darius
#2
05/30/2009 (8:40 am)
This doesn't matter since you already solved it, but I wonder if the problem with the for loop was that it checks the continue condition after it gets the next line of the file on every iteration.

So it goes: get next line, check if we reached the end of the file, do loop. When it reaches the last line of the file, it will grab the last line, then check if it had reached the end of the file, since you just grabbed the last line, it will be at the end of the file, and will quit out of the loop without processing the last line.

Torque 3D Owner Nicolai Dutka
#3
03/19/2010 (1:54 pm)
Heya Baylor!!! Found you randomly while searching for something in the forums... Feel free to email me anytime!