TheBackShed.com

Forum Index : Microcontroller and PC projects : Pointer to the conversation about the LINE bug

Author

Message

thwill

Guru

Joined: 16/09/2019
Location: United Kingdom
Posts: 4311

Posted: 09:58am 28 Feb 2024

Copy link to clipboard

Print this post

Hi folks,

Apologies but can someone point me at the original conversation/thread describing the LINE / integer array bug that Peter has just fixed. I need to copy Peter's fix into MMB4L but want a test program first.

Best wishes,

Tom

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

robert.rozee
Guru

Joined: 31/12/2012
Location: New Zealand
Posts: 2442

Posted: 10:54am 28 Feb 2024

Copy link to clipboard

Print this post

hi Tom,
you are probably looking for this posting:
https://www.thebackshed.com/forum/ViewTopic.php?TID=16657&P=4#218184

it starts on page 4 of the thread titled "PicoMite USB betas"

cheers,
rob :-)
Edited 2024-02-28 20:56 by robert.rozee

thwill

Guru

Joined: 16/09/2019
Location: United Kingdom
Posts: 4311

Posted: 11:07am 28 Feb 2024

Copy link to clipboard

Print this post

Thanks Rob.

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10310

Posted: 11:43am 28 Feb 2024

Copy link to clipboard

Print this post

Tom

You probably won't see the problem. I introduced it in 5.08 when I was doing the big tidy up of parsing arrays used as parameters in drawing statements. Actually, I can't see what the bug was in my code. The fix was just to revert the function getargaddress to a previous working version

thwill

Guru

Joined: 16/09/2019
Location: United Kingdom
Posts: 4311

Posted: 12:05pm 28 Feb 2024

Copy link to clipboard

Print this post

matherp said Tom

You probably won't see the problem. I introduced it in 5.08 when I was doing the big tidy up of parsing arrays used as parameters in drawing statements. Actually, I can't see what the bug was in my code. The fix was just to revert the function getargaddress to a previous working version

Thanks Peter, but I only copied the implementation of LINE from the PicoMite two days ago so I suspect the issue is present.

Best wishes,

Tom

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2640

Posted: 12:15pm 28 Feb 2024

Copy link to clipboard

Print this post

This is a quick way to test it

Quote A minimal command line version.

> dim x%(3)=(30,90,90,30), y%(3)=(30,30,90,90)
> Line x%(0),y%(0),x%(1),y%(1)
>

Draws 3 sides of a square but the 4th finishes at (0,0)

Edit.
Just found an odd thing. It only happens if "%" is used.
Dim Integer ... works properly.
Edited 2024-02-28 22:26 by phil99

thwill

Guru

Joined: 16/09/2019
Location: United Kingdom
Posts: 4311

Posted: 06:51pm 02 Mar 2024

Copy link to clipboard

Print this post

matherp said Actually, I can't see what the bug was in my code. The fix was just to revert the function getargaddress to a previous working version

In the un-reverted code where the integer and float arrays were using the same path you were skipping a potential "!" at the end of a variable name but not a potential "%" character, change this:

do {
p++;
} while (isnamechar(*p));
if (*p == '!') p++;
if (*p == '(') {
p++;
skipspace(p);
if (*p != ')') { // array element
*n = 1;
return;
}
}

to this:

do {
p++;
} while (isnamechar(*p));
if (*p == '!' || *p == '%') p++; // <--------- changed line
if (*p == '(') {
p++;
skipspace(p);
if (*p != ')') { // array element
*n = 1;
return;
}
}

phil99 said Just found an odd thing. It only happens if "%" is used.

As it happens, not an odd thing, the whole problem is that Peter's refactoring introduced a bug where the potential "%" is not skipped.

Best wishes,

Tom
Edited 2024-03-03 04:52 by thwill

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10310

Posted: 07:04pm 02 Mar 2024

Copy link to clipboard

Print this post

Quote change this:

Quote to this:

thanks

Print this page

To reply to this topic, you need to log in.