| ... | ... | @@ -18,7 +18,8 @@ pub fn TrailerFlags(comptime Fields: type) type { |
| 18 | 18 | |
| 19 | 19 | pub const FieldEnum = std.meta.FieldEnum(Fields); |
| 20 | 20 | |
| 21 | | pub const InitStruct = blk: { |
| 21 | pub const ActiveFields = std.enums.EnumFieldStruct(FieldEnum, bool, false); |
| 22 | pub const FieldValues = blk: { |
| 22 | 23 | comptime var fields: [bit_count]Type.StructField = undefined; |
| 23 | 24 | inline for (@typeInfo(Fields).Struct.fields) |struct_field, i| { |
| 24 | 25 | fields[i] = Type.StructField{ |
| ... | ... | @@ -57,19 +58,18 @@ pub fn TrailerFlags(comptime Fields: type) type { |
| 57 | 58 | self.bits |= 1 << field_index; |
| 58 | 59 | } |
| 59 | 60 | |
| 60 | | /// `fields` is a struct with each field set to an optional value. |
| 61 | | /// Only the non-null bits are observed and are used to set the flag bits. |
| 62 | | pub fn init(fields: InitStruct) Self { |
| 61 | /// `fields` is a boolean struct where each active field is set to `true` |
| 62 | pub fn init(fields: ActiveFields) Self { |
| 63 | 63 | var self: Self = .{ .bits = 0 }; |
| 64 | 64 | inline for (@typeInfo(Fields).Struct.fields) |field, i| { |
| 65 | | if (@field(fields, field.name)) |_| |
| 65 | if (@field(fields, field.name)) |
| 66 | 66 | self.bits |= 1 << i; |
| 67 | 67 | } |
| 68 | 68 | return self; |
| 69 | 69 | } |
| 70 | 70 | |
| 71 | | /// `fields` is a struct with each field set to an optional value (same as `init`). |
| 72 | | pub fn setMany(self: Self, p: [*]align(@alignOf(Fields)) u8, fields: InitStruct) void { |
| 71 | /// `fields` is a struct with each field set to an optional value |
| 72 | pub fn setMany(self: Self, p: [*]align(@alignOf(Fields)) u8, fields: FieldValues) void { |
| 73 | 73 | inline for (@typeInfo(Fields).Struct.fields) |field, i| { |
| 74 | 74 | if (@field(fields, field.name)) |value| |
| 75 | 75 | self.set(p, @intToEnum(FieldEnum, i), value); |
| ... | ... | @@ -142,7 +142,7 @@ test "TrailerFlags" { |
| 142 | 142 | |
| 143 | 143 | var flags = Flags.init(.{ |
| 144 | 144 | .b = true, |
| 145 | | .c = 1234, |
| 145 | .c = true, |
| 146 | 146 | }); |
| 147 | 147 | const slice = try testing.allocator.allocAdvanced(u8, 8, flags.sizeInBytes(), .exact); |
| 148 | 148 | defer testing.allocator.free(slice); |
Erik Arvstedt <erik.arvstedt@gmail.com> 2022-05-04 20:01:49+02:00
lib