[tz] can struct definitions from localtime.c be moved to private.h ?

The source file localtime.c includes the definitions for structures used in the binary (compiled) zone files. I am writing code which accesses these compiled zone files. It would be most convenient to have the struct definitions moved from localtime.c to a header file, e.g. private.h which I can include in other code. struct ttinfo struct lsinfo struct state struct rule