This returns the character (as an int) at the index. Equivalent to
string[index], but qc code doesn't have char-level access and not having
it means that strings can internally change to wchar without too much
fuss (maybe).
If a temp string is found in the return slot, PR_FreeTempStrings won't
delete the string. However, PR_PopFrame was blindly stomping on the
possibly surviving temp string with the push strings, which would cause
a leak.
refresh won't be in the drawing buffer protocol, and the move commands
need to be offset by the view's position in its window, but it works as
intended.
This causes the block to be freed when the forward: handler returns
(assuming it's not yet another builtin). This is necessary so calling a
lot of forwarded messages in a loop doesn't leak memory (though it will
get freed eventually).
This "pushes" a temp string onto the callee's stack frame after removing
it from the caller's stack frame. This is so builtins can pass
auto-freed memory to called progs code. No checking is done, but mayhem
is likely to ensue if a string is pushed that was allocated in an
earlier frame.
With this, object's implementing forward:: seem to accept the message
well, including receiving all the original args (not quite sure how to
deal with them in ruamoko code just yet, though).
PR_AllocTempBlock() works the same way as PR_SetTempString(), except
that it takes a size parameter and always allocates (never tries to
merge). This is, in a way, abusing the string system, but I needed a way
to allocate a block of progs memory that would be automatically freed
when the current frame ended. The biggest abuse is the need to cast away
the const of PR_GetString()'s return value.
libr supplies an __obj_forward definition that links to a builtin, but
as it is the only def in its object file, it is readily replaceable by
an alternative Ruamoko implementation.
The builtin version currently simply errors out (rather facetiously),
but only as a stub to allow progs to load.
This should speed up ruamoko code somewhat as hash table lookups have
been replaced with direct array indexing. As a bonus, support for
message forwarding has been added (though not tested).
Move the semi-permanent resource initialisation into the module init and
the cleanup of those resources into cleanup. Makes actual runtime init
much easier to read.
Rather than relying on progs code version, use the string to determine
whether PR_Sprintf should behave as if floats have been promoted through
... I imagine I'll get to the rest of the server code at some stage.
With these two changes, nq-x11 works again (teleporters were the
symptom).
The server code is not yet ready for doubles, especially in its varargs
builtins: they expect only floats. When float promotion is enabled
(default for advanced code, disabled for traditional or v6only),
"@float_promoted@" is written to the prog's strings.
That was a fair bit trickier than I thought, but now .return and .paramN
are handled correctly, too, especially taking call instructions into
account (they can "kill" all 9 defs).
This reverts commit a2f203c840.
There is indeed a world of difference between "any" and "only", and it
helps if I read the rest of the docs AND the code :P.
As expected, this does not fix the mangled pointer problem in
struct-init-param.r, but it does improve the ud-chains. There's still a
problem with .return, but it's handling in flow_analyze_statement is a
bit "special" :P.
Doing the same thing at the end of two branches of an if/else seems off.
And doing an associative(?) set operation every time through a loop is
wasteful.
