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termio: MessageData should pick appropriately sized int for len

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This commit is contained in:
Mitchell Hashimoto
2023-10-26 09:36:56 -07:00
parent b049cb7d21
commit 2fd2693693
1 changed files with 13 additions and 3 deletions
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16
src/termio/message.zig
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@ -84,16 +84,15 @@ pub const Message = union(enum) {
/// are a stable pointer, or require deallocation. This is helpful for thread
/// messaging utilities.
pub fn MessageData(comptime Elem: type, comptime small_size: comptime_int) type {
assert(small_size <= std.math.maxInt(u8));
return union(enum) {
pub const Self = @This();
pub const Small = struct {
pub const Max = small_size;
pub const Array = [Max]Elem;
pub const Len = std.math.IntFittingRange(0, small_size);
data: Array = undefined,
len: u8 = 0,
len: Len = 0,
};
pub const Alloc = struct {
@ -184,3 +183,14 @@ test "MessageData init alloc" {
try testing.expect(io == .alloc);
io.alloc.alloc.free(io.alloc.data);
}
test "MessageData small fits non-u8 sized data" {
const testing = std.testing;
const alloc = testing.allocator;
const len = 500;
const Data = MessageData(u8, len);
const input: []const u8 = "X" ** len;
const io = try Data.init(alloc, input);
try testing.expect(io == .small);
}