If Chibi-Scheme is installed, enable a debugger which can be used to
inspect the state of the VM when an error occurs.
So far only supports printing local/global variables. E.g.
dbg> (print-variable "g_theSactMenu")
...
dbg> (print-locals)
...
The "SaveFolder" key in System40.ini gives the name of the save
directory. Earlier versions of system 4 treated this as a relative path
in the game directory, while later versions treated it as a path
relative to "$USER\My Documents\AliceSoft\$GAME_NAME". I've chosen the
latter approach, but using a xsystem4-specific directory to avoid
reading/overwriting saves created by System40.exe.
Add utility for dumping information from AIN files.
For now this is pretty simplistic. The main use is to dump HLL function
prototypes to help with writing stubs.
Future features:
* dump to JSON format
* full AIN dump which could be rebuilt by a complementary tool, e.g.
to enable editing bytecode for testing purposes.
Implement CALLMETHOD, SH_STRUCTREF and PUSHSTRUCTPAGE instructions.
Constructors are a bit tricky since SH_LOCALCREATE has to implicitly
call an arbitrary number of functions before it returns (just changing
the instruction pointer only allows for calling a single function).
To get around this, there is now a vm_call() function which is used to
call a function synchronously, before returning from the current
instruction.
Methods are implemented as functions, except that they get a struct page
as local variable -1.
Destructors are still not implemented.
An assortment of instructions have been implemented so far, mostly basic
stuff such as stack management. The following program can be executed:
int main(void)
{
hello(2);
for (;;) {
system.Peek();
system.Sleep(1);
}
return 0;
}
void hello(int n)
{
int i;
for (i = 0; i < n; i++) {
system.Output("Hello, world! " + string(i));
}
}
Nunuhara Cabbage