core: Add a high level option/argument parser.
* gpg-error.h.in (GPGRT_CONFDIR_USER, GPGRT_CONFDIR_SYS): New consts. (ARGPARSE_FLAG_SYS, ARGPARSE_FLAG_USER, ARGPARSE_FLAG_VERBOSE) (ARGPARSE_NO_CONFFILE, ARGPARSE_CONFFILE, ARGPARSE_OPT_CONFFILE): New consts. (ARGPARSE_conffile, ARGPARSE_noconffile): New macros. (gpgrt_set_confdir): New func. (gpgrt_argparser): New func. * src/argparse.c (confdir): New var. (enum argparser_states): New. (struct _gpgrt_argparse_internal_s): Add a couple of new fields. (initialize): Init them. (any_opt_conffile): New. (_gpgrt_argparser): New. (_gpgrt_set_confdir): New. * src/visibility.c (gpgrt_argparser): New. (gpgrt_set_confdir): New. * src/gpg-error.def.in, src/gpg-error.vers: Add those functions. * tests/t-argparse.c (main): Reworked. * tests/etc/t-argparse.conf: New file. * tests/t-argparse.conf: New file.
gpgrt_argparser is a high level version of gpgrt_argparse. It handles
reading of configuration files internally and allows allows for a
global configuration file. The design is so that it minimizes the
work to replace the existing option parsing in gpg and friends by this
one and to allow global configuration files for them.
This is the just the basic code which should allow replacement of the
parsers. A forthcoming patch will implement flags for options given
in the global config file.
- GnuPG-bug-id: T4788
- Signed-off-by: Werner Koch <wk@gnupg.org>