Tidy up Oar Entry default data

src/math.zig

@@ -1,6 +0,0 @@
-///
-/// Rounds the `Number` `value` up to the nearest `multiple`.
-///
-pub fn roundUp(comptime Number: type, value: Number, multiple: Number) Number {
-    return value + @mod(@mod(multiple - value, multiple), multiple);
-}

src/oar.zig

@@ -7,19 +7,19 @@ const sys = @import("./sys.zig");
 /// Typically, following this block in memory is the file data it holds the meta-information for.
 ///
 pub const Entry = extern struct {
-    signature: [3]u8,
+    signature: [3]u8 = signature_magic,
     revision: u8,
-    name_length: u8,
+    name_length: u8 = 0,
     name_buffer: [255]u8 = std.mem.zeroes([255]u8),
     file_size: u64,
-    padding: [244]u8,
+    padding: [244]u8 = std.mem.zeroes([244]u8),
 
     ///
     /// Returns `true` if `entry` correctly identifies itself as a valid Oar entry, otherwise
     /// `false`.
     ///
     pub fn isValid(entry: Entry) bool {
-        return std.mem.eql(u8, &entry.signature, "oar");
+        return std.mem.eql(u8, &entry.signature, signature_magic[0 ..]);
     }
 
     ///
@@ -44,5 +44,5 @@ pub const Entry = extern struct {
     ///
     /// Magic identifier used to validate [Entry] data.
     ///
-    const signature_magic = "oar";
+    const signature_magic = [3]u8{'o', 'a', 'r'};
 };

src/sys.zig

@@ -3,7 +3,6 @@ const ext = @cImport({
 });
 
 const io = @import("./io.zig");
-const math = @import("./math.zig");
 const mem = @import("./mem.zig");
 const meta = @import("./meta.zig");
 const oar = @import("./oar.zig");