Expand description
GNU-like command line options parser for long and short formats. Optional
argument (aka option’s value) may be associated with an option. The parsing
routine parse_opts()
accepts two user callbacks:
opt_i()
provides parser with a context the parsed option may be used,opt_h()
is the actual handler of the option.
The library doesn’t interpret parsed options, rather passes them to the
user’s handler to further processing. The idea is similar to getopt(3)
and getopt_long(3)
routines.
Options Format
Short format
All options starting with a single hyphen character -
are short options.
For example: -a -b -c
constitute 3 short options. These options may grouped
into a single block of options as -abc
.
If a short option requires an argument, the argument may be provided directly
after the option or separated by white-space(s): -dARG
or -d ARG
.
If short options are grouped into a block, the last one may be provided
with an argument. For example: -abcdARG
or -abcd ARG
is equivalent to
-a -b -c -d ARG
, where -a
-b
-c
don’t have an argument, while -d
does.
Long format
If an option starts with --
it’s long format option. For example --help
.
Long options may not be formed into a group. An argument may be provided to
the long-format option directly after =
character or followed by
white-space(s): --config=FILE
or --config FILE
.
Structs
- Option constraints.
- Option’s value description.
Enums
- Command option types.
- Option info codes returned by the
opt_i()
callback. - The enumeration specifies how a value has been provided for an option.
- Parser error codes returned by the option handler
opt_h()
. - Option process codes returned by the option handler
opt_h()
.
Functions
- Parse process command line options.