%? - substitute the macro name as invoked
%?? - substitute the macro name as defined
In particular:
%idefine keyword $%?
... can be used to make a new keyword "disappear".
Normally, contexts aren't used with a large number of macros, but in
case someone does, do use hash tables for those as well. This
simplifies the code somewhat, since *all* handling of macros is now
done via hash tables.
Future note: consider if it wouldn't be better to allow struct
hash_table to be allocated by the caller, instead of being allocated
by the hash table routine.
Fix buffer overflow in preproc.c due to an incorrect test. In the
code:
for (r = p, s = ourcopy; *r; r++) {
if (r >= p+MAX_KEYWORD)
return tokval->t_type = TOKEN_ID; /* Not a keyword */
*s++ = tolower(*r);
}
*s = '\0';
... the test really needs to be >= since for the pass where there are
equal:
a) a nonzero byte means we have > MAX_KEYWORD characters, and
b) s = ourcopy+MAX_KEYWORD; but if the test doesn't trigger,
we can write one more character *plus* the null byte, overflowing
ourcopy.
First cut at AVX machinery support. The only instruction implemented
is VPERMIL2PS, and it's probably buggy. I'm checking this in with the
hope that other people can start helping out with (a) testing this,
and (b) adding instructions.
NDISASM support is not there yet.
Correct the implementation of %arg and %local.
It's questionable how much they make sense for 64-bit mode; even in
32-bit mode one normally make references off the stack pointer instead
of the base pointer (frame pointer), but that requires keeping track
of the stack pointer offset.
Correct the handling of floating-point tokens in the preprocessor.
The preprocessor scanner and the main scanner really are painfully
divergent for no good reason.
Proper use of bool and enum makes code easier to debug. Do more of
it. In particular, we really should stomp out any residual uses of
magic constants that aren't enums or, in some cases, even #defines.
Per the comment:
* In a MMacro describing a `%rep' block, the `in_progress' field
* isn't merely boolean, but gives the number of repeats left to
* run.
This fixes the "global" directive not getting recognized, since it
repeats over all its arguments.
Both C and C++ have "bool", "true" and "false" in lower case; C
requires <stdbool.h> for this, in C++ it is an inherent type built
into the compiler. Use those instead of the old macros; emulate with
a simple typedef enum if unavailable.
Concentrate compiler dependencies to compiler.h; make sure compiler.h
is included first in every .c file (since some prototypes may depend
on the presence of feature request macros.)
Actually use the conditional inclusion of various functions (totally
broken in previous releases.)
The parent-pointer-based freeing loop in %undef should not advance the
parent pointer when a node is freed, since that will result accessing
freed memory.
Implement the -MG option, to generate dependencies in the presence of
generated files. In the end, we probably need to support the full
gamut of GCC-like dependency-generation options.
Document that %+ needs a space after it due to collision with %+1
syntax for multiline macro arguments; make it issue an error message
rather than crashing.
Switch the preprocessor over to using the hash table library. On my
system, this improves the runtime of the output of test/pref/macro.pl
from over 600 seconds to 7 seconds.
Macros have an odd mix of case-sensitive and case-insensitive
behaviour, plus there are matching parameters for arguments, etc. As
a result, we use case-insensitive hash tables and use a linked list to
store all the possible isomorphs.
