Some work on tests & metadata

src/test.zig

@@ -1,8 +1,27 @@
 const std = @import("std");
 const stuff = @import("builtin");
 
-test "Basics" {}
+const Archive = @import("archive.zig");
+const Superblock = @import("super.zig");
+
+const TestArchive = "testing/LinuxPATest.sfs";
+
+test "Basics" {
+    var fil = try std.fs.cwd().openFile(TestArchive);
+    defer fil.close();
+    var sfs: Archive = try .init(std.testing.allocator, fil);
+    defer sfs.deinit();
+}
+
+const TestFile = "Start.exe";
+const TestFileExtractLocation = "testing/Start.exe";
 
 test "ExtractSingleFile" {}
 
+const TestFullExtractLocation = "testing/TestExtract";
+
 test "ExtractCompleteArchive" {}
+
+const CorrectSuperblock = Superblock{
+    .magic = "hsqs",
+};

src/util/metadata.zig

@@ -14,6 +14,7 @@ decomp: *DecompMgr,
 buf: [8192]u8 = undefined,
 
 interface: Reader,
+err: anyerror = 0,
 
 pub fn init(rdr: Reader, decomp: *DecompMgr) This {
     return .{
@@ -23,12 +24,16 @@ pub fn init(rdr: Reader, decomp: *DecompMgr) This {
             .buffer = &[0]u8{},
             .end = 0,
             .seek = 0,
-            .vtable = &{
+            .vtable = &.{
                 .stream = stream,
             },
         },
     };
 }
 
+fn advance(self: *This) !void {}
+
 fn stream(rdr: *Reader, wrt: *Writer, limit: Limit) StreamError!usize {
+    const this: *This = @fieldParentPtr("interface", rdr);
+    if (rdr.end == rdr.seek) try this.advance();
 }