Function auxgetinfo

lib/lua/src/ldebug.c:329–382

static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
                       Closure *f, CallInfo *ci) {
  int status = 1;
  for (; *what; what++) {
    switch (*what) {
      case 'S': {
        funcinfo(ar, f);
        break;
      }
      case 'l': {
        ar->currentline = (ci && isLua(ci)) ? getcurrentline(ci) : -1;
        break;
      }
      case 'u': {
        ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
        if (!LuaClosure(f)) {
          ar->isvararg = 1;
          ar->nparams = 0;
        }
        else {
          ar->isvararg = f->l.p->is_vararg;
          ar->nparams = f->l.p->numparams;
        }
        break;
      }
      case 't': {
        ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
        break;
      }
      case 'n': {
        ar->namewhat = getfuncname(L, ci, &ar->name);
        if (ar->namewhat == NULL) {
          ar->namewhat = "";  /* not found */
          ar->name = NULL;
        }
        break;
      }
      case 'r': {
        if (ci == NULL || !(ci->callstatus & CIST_TRAN))
          ar->ftransfer = ar->ntransfer = 0;
        else {
          ar->ftransfer = ci->u2.transferinfo.ftransfer;
          ar->ntransfer = ci->u2.transferinfo.ntransfer;
        }
        break;
      }
      case 'L':
      case 'f':  /* handled by lua_getinfo */
        break;
      default: status = 0;  /* invalid option */
    }
  }
  return status;
}


LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {