Rather than allocating a list object for the fast locals and another
(extensible one) for the value stack and allocating the block stack
dynamically, allocate the block stack with a fixed size (CO_MAXBLOCKS
from compile.h), and stick the locals and value stack at the end of
the object (this is now possible since the stack size is known
beforehand). Get rid of the owner field and the nvalues argument --
it is available in the code object, like nlocals.
This requires small changes in ceval.c only.
hash value. Interning strings (which requires hash caching) tries to
ensure that only one string object with a given value exists, so
equality tests are one pointer comparison. Together, these can speed
the interpreter up by as much as 20%. Each costs the size of a long
or pointer per string object. In addition, interned strings live
until the end of times. If you are concerned about memory footprint,
simply comment the #define out here (and rebuild everything!).
to PyCode_New() argument list. Move MAXBLOCKS constant to conpile.h.
Added accurate calculation of the actual stack size needed by the
generated code.
Also commented out all fprintf statements (except for a new one to
diagnose stack underflow, and one in #ifdef'ed out code), and added
some new TO DO suggestions (now that the stacksize is taken of the TO
DO list).
dis() still disassembles the last frame of the lats stack trace.
dis(x) disassembles x, which may be a code object, function, or method.
disassemble(co, [lasti]) disassembles a code object; the lasti
argument is now optional.
disco(...) is an alias for disassemble(...), for backward compatibility.
to Python. Minimal documentation is included in comments at the top
of the file, and in the Misc/PURIFY.README file. Note that this
module must be statically linked since Pure doesn't provide shared
stubs libraries.
(Setup.in): Added commented template for pure module
(syslogmodule.c): ins() function wasn't declared static.
big-endian machines. This is done by directing the struct module's pack
and unpack methods to treat the data always in bin endian format.
This has been tested on irix (big endian) and solaris x86 (little endian)
but not yet on the mac.
unsigned. This fixes the 8bit-char-in-key platform incompatibility.
I also removed the old backwards compatibility code, and the commented
lisp rotor code. I retained the lisp docstrings as comments preceding
each function.
Guido van Rossum
Roger E. Masse
Barry Warsaw