Opened 19 years ago

Closed 19 years ago

Last modified 5 years ago

#8356 closed patch

Descumm misdecompilation fix

Reported by: SF/madm00se Owned by: fingolfin
Priority: normal Component: Tools
Version: Keywords:
Cc: Game:


This patch does a few things all-in-one. I can split it up if anybody wants me to.

Most importantly, it fixes the misdecompilation of the case from sam&max script 52 mentioned in the comment at the top of descumm.cpp (The "while" and "else" detection code interference.)

Other than that it:

* Makes us output "arrayXXX[...]" instead of "array-XXX[...]" because that's what we do with all other types of variables and it's easier to compile.

* Makes us output "else if" in places we didn't before.

* Makes us output "var++" and "var--" instead of "var += 1" and "var += -1", since SCUMM doesn't support values other than +/- 1.

* Makes us output "unless (condition)" instead of "if (!(condition))" and "until (condition)" instead of "while (!(condition))" because it's prettier.

* And finally (and most controversially), makes us output the "break" keyword where needed (with it's usual c meaning for breaking out of loops) and turns the current "break()" into "breakHere()" to avoid conflicts with the keyword. It's already called breakHere() in v8, which is why I chose it, but maybe we should change it to "yield()" or something to make the keyword and the function more distinct?

I've got testcases if anybody wants to them.

Ticket imported from: #1037397. Ticket imported from: patches/461.

Attachments (1)

diff_v1_0_1.txt (11.9 KB ) - added by SF/madm00se 19 years ago.
Descumm multipatch v1.0.1

Download all attachments as: .zip

Change History (5)

comment:1 by SF/madm00se, 19 years ago

I forgot to remove a line which caused the ++ and -- not to work. Updated patch attached.

by SF/madm00se, 19 years ago

Attachment: diff_v1_0_1.txt added

Descumm multipatch v1.0.1

comment:2 by fingolfin, 19 years ago

Owner: set to fingolfin
Status: newclosed

comment:3 by fingolfin, 19 years ago

Looks fine, thanks.

comment:4 by digitall, 5 years ago

Component: Tools
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