shithub: mc

ref: 54da79816fab4a03e8f6022d6c9764d9099abd60
dir: /libstd/slurp.myr/

use "alloc.use"
use "die.use"
use "error.use"
use "extremum.use"
use "fmt.use"
use "sys.use"
use "types.use"

pkg std =
	const slurp : (path : byte[:] -> error(byte[:], byte[:]))
	const tryslurp	: (path : byte[:] -> byte[:])
;;

const Bufinc = 4096

const tryslurp = {path
	match slurp(path)
	| `Some data:	-> data
	| `None:	-> [][:]
	;;
}

const slurp = {path
	var fd
	var n
	var len
	var buf

	fd = open(path, Ordonly, 0o777)
	if fd < 0
		-> `Failure "Could not open file"
	;;

	len = 0
	buf = slalloc(Bufinc)
	while true
		n = read(fd, buf[len:])
		if n == 0
			goto done
		;;
		len += n
		buf = slgrow(buf, len + Bufinc)
	;;
:done
	-> `Success buf[:len]
}