visibility determination
-rw-r--r-- 95 .gitignore
-rw-r--r-- 35149 COPYING
-rw-r--r-- 643 Makefile
-rw-r--r-- 656 README.md
drwxr-xr-x - libs
drwxr-xr-x - sdr
drwxr-xr-x - src
drwxr-xr-x - tools