shithub: mc

ref: 09a34baac6757c7a4c33e3e3c50054acbb1b70bb
dir: /lib/std/readall.myr/

View raw version 
use "errno"
use "result"
use "option"
use "syswrap"
use "types"

pkg std =
	const readall : (fd : fd, dst : byte[:] -> result(size, errno))
;;

const readall = {fd, dst
	var sz

	sz = dst.len
	while dst.len != 0
		match std.read(fd, dst)
		| `Ok 0:
			break
		| `Ok n:
			dst = dst[n:]
		| `Err e:
			-> `Err e
		;;
	;;
	-> `Ok (sz - dst.len)
}