www.pudn.com > qrencode-2.0.0.rar > TODO

Thread unsafe.
Only two functions, QRspec_newFrame() and init_rs(), are thread unsafe, but
all of qrencode functions are thread unsafe because of them.

This package contains

*.c and *.h files (total):  5916 lines, 146312 bytes.
configure script         : 22510 lines, 724802 bytes.

It's absolutely crazy.