zxcvbn-c is a C/C++ implementation of the zxcvbn password strength
estimation.

The code is intended to be included as part of the source of a
C/C++ program. Like the original this code is for character sets
which use single byte characters primarily in the code range 0x20
to 0x7E.

Homepage:
https://github.com/tsyrogit/zxcvbn-c/
