tree 3b899e3024a49e22e5b24de1d3726ac379650f0c
parent 8e2c838f28b439af2cea7ae8ebd570f42ec5cf87
author Tim Kilbourn <tkilbourn@google.com> 1474327055 -0700
committer Tim Kilbourn <tkilbourn@google.com> 1474391397 -0700

[lib] Add more libc impls

Adding isdigit, isspace, atoi, and strchr. Used in cmdline parsing.
Add NULL definitions to header files that the C standard says should
define it.

Change-Id: Id29076e0e799ea6ae121dc91dbd4b8c38f54580c