Re: C API - how to combine lua_createtable and lua_settable
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- Subject: Re: C API - how to combine lua_createtable and lua_settable
- From: Sean Conner <sean@...>
- Date: Wed, 2 Mar 2011 18:06:57 -0500
It was thus said that the Great Henderson, Michael D once stated:
> In my luaopen_xxx function, I'm using
>
> const struct luaL_Reg myLib[] = { . . . }l
> lua_createtable(L,0,(sizeof(myLib)/sizeof(const struct luaL_Reg))-1);
> luaL_register(L,0,myLib);
> return 1;
>
> That puts my functions in the module that I'm working on. I'd like to add strings to the table and am not sure how to proceed.
>
> To add a value to a table, I have been
>
> lua_newtable(L);
> lua_pushstring(L,"version");
> lua_pushstring(L,"0.1");
> lua_settable(L,-3);
>
> Does this play well with lua_createtable? Could I just do this?
>
> const struct luaL_Reg myLib[] = { . . . }l
> lua_createtable(L,0,(sizeof(myLib)/sizeof(const struct luaL_Reg))-1);
> luaL_register(L,0,myLib);
>
> lua_pushstring(L,"version");
> lua_pushstring(L,"0.1");
> lua_settable(L,-3);
>
> return 1;
Yes. Even this works (from one of my current projects [1]):
static const struct luaL_reg reg_dns[] =
{
{ "encode" , dnslua_encode } ,
{ "decode" , dnslua_decode } ,
{ "strerror" , dnslua_strerror } ,
{ "query" , dnslua_query } ,
{ NULL , NULL }
};
int luaopen_org_conman_dns(lua_State *L)
{
luaL_register(L,"org.conman.dns",reg_dns);
lua_pushliteral(L,"Copyright 2010 by Sean Conner. All Rights Reserved.");
lua_setfield(L,-2,"COPYRIGHT");
lua_pushliteral(L,"Encode/Decode and send queries via DNS");
lua_setfield(L,-2,"DESCRIPTION");
lua_pushliteral(L,"0.0.1");
lua_setfield(L,-2,"VERSION");
return 1;
}
-spc (You can, of course, supply NULL for the table name in luaL_register
and it'll still work)
[1] http://www.conman.org/software/spcdns/