How to get a lua script into lua bytecode?

Question

If I had a lua script, say

print'hi'

How would I get the lua bytecode equivalent to it using c++? I'm not sure if I'm explaining this right though. Thanks for all your help!

Do you want to produce a standalone executable? Do you want to call C++ functions from lua? You should probably edit the question until you are fairly sure you are explaining it right. — nwp
– nwp, Commented Apr 11, 2017 at 21:44
The relevant C API functions are luaL_loadfile or luaL_loadstring and lua_dump. — lhf
– lhf, Commented Apr 11, 2017 at 22:15

lhf · Accepted Answer · 2017-04-12 01:27:10Z

1

You need to load a script and then dump its bytecode.

The relevant C API functions are luaL_loadfile or luaL_loadstring for loading (they use the primitive lua_load) and lua_dump for dumping.

Loading is easy to do with these helper functions.

Dumping is a bt more work because of the need to provide a writer function. It may be easier to call string.dump after loading:

// load script, leave function on the stack
lua_getglobal(L,"string");
lua_getfield(L,"dump");
lua_pushvalue(L,-3);
lua_call(L,1,1);
// string containing bytecode left on the stack

answered Apr 12, 2017 at 1:27

lhf

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