shithub: mc

ref: 954728ed5cc60e638cd858d232c5851f72ad7343
dir: /lib/std/dirname.myr/

use "alloc.use"
use "slcp.use"
use "die.use"
use "sldup.use"
use "strfind.use"
use "option.use"
use "types.use"

pkg std =
	const dirname	: (p : byte[:] -> byte[:])
	const basename	: (p : byte[:] -> byte[:])
;;

extern const put : (fmt : byte[:], args : ... -> size)

const dirname = {p
	var end

	for end = p.len; end > 1; end--
		if p[end-1] != '/' castto(byte)
			break
		;;
	;;
	std.put("p: {}, end: {}, p[:{}]: {}\n", p, end, end, p[:end])
	p = p[:end]
	match std.strrfind(p, "/")
	| `std.None:	-> std.sldup(".")
	| `std.Some 0:	-> std.sldup("/")
	| `std.Some i:	-> std.sldup(p[:i])
	;;
}

const basename = {p
	var end

	for end = p.len; end > 1; end--
		if p[end-1] != '/' castto(byte)
			break
		;;
	;;

	std.put("p: {}, end: {}, p[:{}]: {}\n", p, end, end, p[:end])
	p = p[:end]
	match std.strrfind(p, "/")
	| `std.None:	-> std.sldup(p[:end])
	| `std.Some i:	-> std.sldup(p[i+1:end])
	;;
}