Re: Andrea Cini's euwingui
- Posted by jimcbrown (admin) Oct 28, 2009
- 4318 views
Hi
Purely for curiosity's sake, please explain. How have they changed? How would you one write a shim that would convert? What would they convert - from / to? Has the internal structure / arrangement of the sequence changed from 3.x to 4?
Chris
The biggest change was the addition of the cleanup_ptr at the end of every structure (s1 [for sequences], d [for atoms], etc) used internally by euphoria to represent non-integer types. The code checks to see if this is NULL or not, and if not it attempts to interpret the value as an euphoria routine and calls it (runs the code of the routine). So if a 3.1 object was passed, we'd try to read pass the end of the memory for the structure. And then execute it. (But this particular issue is easy to deal with, a shim just needs add NULL to the end of the structure.)
