2019-09-20 14:01:32 +00:00
|
|
|
# stew
|
|
|
|
|
# Copyright 2018-2019 Status Research & Development GmbH
|
|
|
|
|
# Licensed under either of
|
|
|
|
|
#
|
|
|
|
|
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
|
|
|
|
|
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
|
|
|
|
|
#
|
|
|
|
|
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
|
|
|
|
|
2022-07-02 13:23:21 +00:00
|
|
|
import
|
|
|
|
|
unittest2,
|
|
|
|
|
../stew/ptrops
|
2019-09-20 14:01:32 +00:00
|
|
|
|
|
|
|
|
var ints = [2, 3, 4]
|
|
|
|
|
|
|
|
|
|
suite "ptrops":
|
|
|
|
|
test "offset pointer":
|
|
|
|
|
let
|
|
|
|
|
p0: pointer = addr ints[0]
|
|
|
|
|
p1: pointer = addr ints[1]
|
|
|
|
|
check:
|
|
|
|
|
p0.offset(sizeof(int)) == p1
|
|
|
|
|
p1.offset(-sizeof(int)) == p0
|
|
|
|
|
|
|
|
|
|
test "offset ptr":
|
|
|
|
|
let
|
|
|
|
|
p0 = addr ints[0]
|
|
|
|
|
p1 = addr ints[1]
|
|
|
|
|
check:
|
|
|
|
|
p0.offset(0)[] == ints[0]
|
|
|
|
|
p0.offset(1)[] == ints[1]
|
|
|
|
|
p1.offset(-1)[] == ints[0]
|
|
|
|
|
p0.offset(1) == p1
|
|
|
|
|
p1.offset(-1) == p0
|
|
|
|
|
|
|
|
|
|
test "offset max pointer (no overflows!)":
|
|
|
|
|
check:
|
|
|
|
|
cast[pointer](int.high()).offset(3) ==
|
|
|
|
|
cast[pointer](cast[uint](int.high) + 3)
|
|
|
|
|
cast[ptr uint16](int.high()).offset(3) ==
|
|
|
|
|
cast[pointer](cast[uint](int.high) + 6)
|
|
|
|
|
|
|
|
|
|
test "distance pointer":
|
|
|
|
|
let
|
|
|
|
|
p0: pointer = addr ints[0]
|
|
|
|
|
p1: pointer = addr ints[2]
|
|
|
|
|
check:
|
|
|
|
|
p0.distance(p0) == 0
|
|
|
|
|
p0.distance(p1) == sizeof(int) * 2
|
|
|
|
|
p1.distance(p0) == -sizeof(int) * 2
|
|
|
|
|
|
|
|
|
|
test "distance ptr uint16":
|
|
|
|
|
let
|
|
|
|
|
p0 = addr ints[0]
|
|
|
|
|
p1 = addr ints[2]
|
|
|
|
|
check:
|
|
|
|
|
p0.distance(p0) == 0
|
|
|
|
|
p0.distance(p1) == 2
|
|
|
|
|
p1.distance(p0) == -2
|
