Array discrepancy between PC and PPC

[PointOfLight]

If I declare the following:

global(arr$);
Dim(arr$, 11);

On the PC I can do:

for(i$, 0, 11)
//Do something with arr$[i$];
end;

However, if I run the same code on the PPC, I get an error saying that index 11 is out of range for the array. In order to access index 11 on the PPC, I have to do:

Dim(arr$, 12);

[kornalius]

When you DIM 11 elements, it will range from 0 to 10 only. Not 0 to 11. 0 is one element.

[PointOfLight]

Then the PC side is not working right, because

Dim(var$, 11);

gives me 12 elements on the PC, indexed 0 to 11. The project I just sent you will illustrate that. If you reduce the number by 1 in each of the Dim statements at the beginning of LoadResources, the program will still work fine on the PC, but puke on the PPC.

[kornalius]

I have just tested this on both platforms and see no problems. In RangeCheck mode (default in the PIDE) it gives me an error on element 11 on the PC and PPC. Make sure RangeCheck mode is active in the PIDE compiler options.

The RangeCheck mode is only active using the PIDE. No range checking is done in normal runs to keep execution speed optimal. From the Main.ppl or directly running a .ppl, .ppc or .exe, it won't do range checking.

[PointOfLight]

If I go to Run | Compiler Options in the PIDE, I do not see a Range Check option.

[kornalius]

Sorry, Run will do Range Checking automatically. If you don't want to you can Run Dedicated instead.

[quangdx]

can you make an EXE with range checking turned off?
would be useful to get a bit more speed, with a program that has lots of arrays and you know will not go out of range.

[PointOfLight]

Based on what Alain said, Range Checking only applies while in the PIDE, so an executable would be exempt from Range Checking.

[kornalius]

Executables don't have range checking.

[SJD]

Hi, the original PointofLight's question remains here, why is running e.g. this example normaly ? (on my PC) :

global(arr$);
global(i$);
Dim(arr$, 1);
arr$[0] = "a";
arr$[1] = "b";

for(i$, 0, 1)
ShowMessage(arr$[i$]);
end;

Jerry
------------------------
PPLG (PPL is Great)

[kornalius]

Is this running from the PIDE direclty?

[PointOfLight]

For me, yes. If I did:

Dim(var$, 11);

I could do this:

for(i$, 0, 11)
var$[i$] = x;
end;

Without getting an error when var$[11] was accessed, even through the PIDE.

[SJD]

Yes, my example is running "errorless" - directly from the PIDE - but only on a PC, on a PPC it writes a runtime error "out of range"

Jerry
-------------------------
PPLG (PPL is Great)

[matteo.m]

is the same that i tried to explain in this post

http://www.arianesoft.ca/e107_plugins/forum/forum_viewtopic.php?3315

at the end i raised of 1 element my arrays :)

[SJD]

Yes, it looks like a trailing error...

Jerry
-------------------------
PPLG (PPL is Great)

[kornalius]

Sounds like the PC version is probably assigning more bytes (read 4 bytes alignment). I don't know why the PPC gives an error when on the PC it doesn't. I will look it up next week. Thank you for reporting this.

[kornalius]

I clearly get a range check error on the PC. I will look into the range check error in depth now.