In newest LUA 5.2 beta is implemented UNSIGNED INTEGER type and library
bit32 for bitwise operations.
BEAUTIFULL !
But I don't like write
a = bit32.bor(bit32.band(5,2345),bit32.band(23,7))
instead of
a = 5&2345|23&7
that's why I rework source codes ( lua-5.2.0-beta.tar.gz [NEW]
2011-07-08
http://www.lua.org/work/lua-5.2.0-beta.tar.gz )
to use "native" operators (based on
http://www.wra1th.plus.com/lua/risclua.html source code) :
band &
bor |
bxor ^^
lshift <<
rshift >>
bnot ~
and my own logical operators:
and &&
or ||
not !
All source code changes are dependent on (luaconfig.h)
#define GCW_BIT
/*
GCW_BIT: Use bit library.
This extends virtual machine with bitwise operations
&,|, ^^, ~, <<, >> and provides corresponding events.
Warning! Makes code non-portable.
Affects c.lvm, c.lcode, c.lopcodes, c.ltm
c.llex, c.lparser, h.lcode, h.lopcodes
h.ltm, h.llex, h.luaconf.
additionally NUM_logical operators ( return numerical (1,0), not boolean
values )
!,&&,||
*/
IMPORTANT: in standart LUA is not possible use boolean (true,false) in
arithmetical operations,
but I need it.
On (lvm.c line:375) is it possible (unremark) allow using booleans only
for new operators.
------------------------------
Need tests, if all is correct.
------------------------------
SOURCE:
http://sourceforge.net/projects/lualubit/files/
BASIC TEST ... approximately 5x faster native versus bit32.bxxx
operators, more readable LUA source
