Argtable is an ANSI C library for parsing GNU style command line arguments.
It enables a program's command line syntax to be defined in the source
code as an array of argtable structs. The command line is then parsed
according to that specification and the resulting values are returned in
those same structs where they are accessible to the main program. Both tagged
(-v, --verbose, --foo=bar) and untagged arguments are supported, as are
multiple instances of each argument. Syntax error handling is automatic and
the library also provides the means for displaying the command line syntax
directly from the array of argument specifications.
Argtable can function as a "getopt_long" replacement, without the user
of the program noticing the difference. Unlike "getopt_long", argtable is
cross platform and works on Windows and Mac as well as Posix systems.