luaL_tobuffer

[Nodir Temirhodzhaev <nvtem@...>]

I suggest to add:

[include/lauxlib.h]

typedef struct luaL_rwBuffer {
  char *p;
  size_t size;
} luaL_rwBuffer;

LUALIB_API int luaL_tobuffer (lua_State *L, int obj,
luaL_rwBuffer *rwB,
                              int writeable);


[src/lib/lauxlib.c]

LUALIB_API int luaL_tobuffer (lua_State *L, int obj,
luaL_rwBuffer *rwB,
                              int writeable) {
  obj = abs_index(L, obj);
  if (luaL_getmetafield(L, obj, "__tobuffer")) {  /*
is there a metafield? */
    lua_pushvalue(L, obj);
    lua_pushboolean(L, writeable);
    lua_call(L, 2, 2);
    if (!lua_isnil(L, -2)) {
      rwB->p = lua_touserdata(L, -2);
      rwB->size = (size_t) lua_tonumber(L, -1);
    }
    else obj = 0;
    lua_pop(L, 2);
  }
  else if (!writeable && (rwB->p = (char
*)lua_tostring(L, obj)) != NULL)
    rwB->size = lua_strlen(L, obj);
  else obj = 0;
  return obj;
}




		
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