Reading GDSText saved by klayout

Jay

Data written to the file looks consistent. When read back on klayout, it seems to fit all the data in first quadrant.

My layout centered at origin is no longer the same.

e.g.
BGNSTR
STRNAME simpleCell

BOUNDARY
LAYER 100
DATATYPE 0
XY -9740: -23500
-23500: -9740
-23500: 9740
-9740: 23500
9740: 23500
23500: 9740
23500: -9740
9740: -23500
-9740: -23500
ENDEL

BOUNDARY
LAYER 101
DATATYPE 0
XY -9740: -23500
-9740: 23500
9740: 23500
9740: -23500
-9740: -23500
ENDEL

BOUNDARY
LAYER 102
DATATYPE 0
XY -23500: -9740
-23500: 9740
23500: 9740
23500: -9740
-23500: -9740
ENDEL
ENDSTR

Thanks,
~J

Matthias

Hi Jay,

I suspect there is an interaction with LOCALE settings. I am not aware that the reader uses the current locale but I wouldn't rule out that possibility.

What are your language settings (i.e. output of "locale")?

Best regards,

Matthias

Jay

I generally stick to LANG=C or LANG=POSIX

%locale
LANG=C
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=

In the same session, writing same data as GDS works flawlessly, but GDSText demonstrates the problem. From the data above, it looks like write works correctly, so it's purely read related.

Here is what happened to polygon data:
-9.74000 -23.50000
-23.50000 -9.74000
-23.50000 9.74000
-9.74000 23.50000
9.74000 23.50000
23.50000 9.74000
23.50000 -9.74000
9.74000 -23.50000

became:
0.00000 0.00000
0.24400 0.05200
9.74000 0.05200
23.50000 0.24400
23.50000 9.74000
9.74000 23.50000
0.24400 23.50000
0.05200 9.74000
0.05200 0.24400
0.24400 0.05200

and

-9740: -23500
-9740: 23500
9740: 23500
9740: -23500
-9740: -23500

became:

0.00000 0.00000
0.24400 0.05200
0.24400 23.50000
9.74000 23.50000
9.74000 0.05200
0.24400 0.05200

Notice extra points and signed data getting converted to unsigned.

~J

Jay

Same cell after loading and saving again:

BGNSTR
STRNAME simpleCell

BOUNDARY
LAYER 100
DATATYPE 0
XY 0: 0
244: 52
9740: 52
23500: 244
23500: 9740
9740: 23500
244: 23500
52: 9740
52: 244
244: 52
0: 0
ENDEL

BOUNDARY
LAYER 101
DATATYPE 0
XY 0: 0
244: 52
9740: 52
9740: 23500
244: 23500
244: 52
0: 0
ENDEL

BOUNDARY
LAYER 102
DATATYPE 0
XY 0: 0
52: 244
23500: 244
23500: 9740
52: 9740
52: 244
0: 0
ENDEL
ENDSTR

~J

Matthias

Hi Jay,

I still can't reproduce it, but there was some fishy code in the reader which I suspect was the reason for the problems.

It should be fixed in 0.19.2.

Best regards,

Matthias