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Group.members: fake sentinel at clone time

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Motiejus Jakštys 2022-04-03 14:52:06 +03:00 committed by Motiejus Jakštys
parent 5704deb6b3
commit d4d3729bf0
1 changed files with 12 additions and 7 deletions
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19
lib/Group.zig
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@ -7,18 +7,23 @@ const Group = @This();
gid: u32,
name: [:0]const u8,
//
members: [:null]const ?[:0]const u8,
// should be [:null]const ?[:0]const u8, but it crashes the compiler. See
// https://github.com/ziglang/zig/issues/7517.
// members[members.len] is always null for cloned groups. Once the bug
// in the compiler is fixed, we should update the return type here.
members: []const ?[:0]const u8,
pub fn clone(self: *const Group, allocator: Allocator) Allocator.Error!Group {
var members = try allocator.allocSentinel(?[:0]const u8, self.members.len, null);
var members = try allocator.alloc(?[:0]const u8, self.members.len + 1);
errdefer allocator.free(members);
members.len = self.members.len;
members.len = self.members.len + 1;
for (self.members) |member, i| {
const member_name = member.?;
members[i] = try allocator.dupeZ(u8, member_name);
members[i] = try allocator.dupeZ(u8, member.?);
errdefer allocator.free(members[i]);
}
members[self.members.len] = null;
members.len = self.members.len;
return Group{
.gid = self.gid,
@ -46,7 +51,7 @@ test "Group.clone" {
var group = Group{
.gid = 1,
.name = "foo",
.members = &[_:null]?[:0]const u8{ member1, "member2", null },
.members = &[_:null]?[:0]const u8{ member1, "member2" },
};
var cloned = try group.clone(testing.allocator);