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const std = @import("std");
const Self = @This();
pub const Precision = enum(u1) {
b8 = 0,
b16 = 1,
};
const Header = packed struct(u8) {
identifier: u4,
precision: u4,
};
precision: Precision,
identifier: u2,
elements: union(Precision) {
b8: [64]u8,
b16: [64]u16,
},
pub fn read(reader: *std.Io.Reader) !Self {
const header: Header = @bitCast(try reader.takeByte());
var self: Self = undefined;
self.identifier = @truncate(header.identifier);
self.precision = @enumFromInt(@as(u1, @truncate(header.precision)));
switch (self.precision) {
.b8 => {
self.elements = .{ .b8 = undefined };
for (&self.elements.b8) |*element| {
element.* = try reader.takeByte();
}
},
.b16 => {
self.elements = .{ .b16 = undefined };
for (&self.elements.b16) |*element| {
element.* = try reader.takeInt(u16, .big);
}
},
}
return self;
}
pub fn size_in_file(self: Self) usize {
return 65 + 64 * @as(usize, @intFromEnum(self.precision));
}
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