Problem with bit library trying to mer
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- Subject: Problem with bit library trying to mer
- From: Mike Crowe <mikelocal@...>
- Date: 2005年4月25日 20:53:56 -0400
Lua-List,
No response received the first time.
Can't anybody help?
TIA
Mike
Hi folks,
You have been a great help in the past, so I wonder if I can bounce
something off of you.
I'm working on an embedded Lua library for LuaNIOS, a project I'm
starting to kick off.
I have 2 problems:
1) I'm trying to get bit operations working in Lua. I stole the library
from http://rrt.sc3d.org/Lua.
2) I think an error is getting generated, but my error routine is not
getting called.
My bit library is crashing, and I'm not familiar enough with the issues
of adding a C library to Lua yet.
Don't spend much time, please.
Compiling for 5.1w5, and here's the line I'm testing with.
--
-- Test Lua
--
print("Hello from Lua!")
LED_MATRIX_WIDTH = 21
LED_MATRIX_HEIGHT = 8
LED_ON = 0
LED_OFF = 1
adders = { 512,1024,2048,4096,8192,16384,32768,65536 }
levels = { 0,1,3,7,15,31,63,127 }
current = 1
data = {}
for i=1,LED_MATRIX_WIDTH do
data[i] = LED_OFF
end
math.randomseed(5599)
*build = bit.bor(adders[current],data[i])*
print(build)
print("Goodby from Lua!")
--
If I comment out the build=bit.bor line, program runs fine.
Note: This code doesn't do anything, but is a subset of a test program
I'm writing for LuaNIOS.
I'm initializing the library with:
(functions omitted)
static const struct luaL_reg bitlib[] = {
{"bnot", bit_bnot},
{"band", bit_band},
{"bor", bit_bor},
{"bxor", bit_bxor},
{"lshift", bit_lshift},
{"rshift", bit_rshift},
{"arshift", bit_arshift},
{"mod", bit_mod},
{NULL, NULL}
};
LUALIB_API int luaopen_bit (lua_State *L) {
luaL_openlib(L, "bit", bitlib, 0);
return 1;
}
I'm initializing the library in my main routine with:
lua_State *L=lua_open();
luaopen_base(L);
luaopen_string(L); // opens the string lib.
luaopen_table(L);
luaopen_math(L);
luaopen_io(L);
luaopen_avalon_pio(L);
luaopen_bit(L);
luapush_globals(L);
if ( lua_loadmylua(L) || lua_pcall(L,0,0,0))
fprintf(stderr,"%s\n",lua_tostring(L,-1));
I can files if needed.