Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibGfx/ImageFormats/WebPSharedLossless.cpp

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2024, Nico Weber <thakis@chromium.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibGfx/ImageFormats/WebPSharedLossless.h>
+
+namespace Gfx {
+
+ErrorOr<CanonicalCode> CanonicalCode::from_bytes(ReadonlyBytes bytes)
+{
+    auto non_zero_symbol_count = 0;
+    auto last_non_zero_symbol = -1;
+    for (size_t i = 0; i < bytes.size(); i++) {
+        if (bytes[i] != 0) {
+            non_zero_symbol_count++;
+            last_non_zero_symbol = i;
+        }
+    }
+
+    if (non_zero_symbol_count == 1)
+        return CanonicalCode(last_non_zero_symbol);
+
+    return CanonicalCode(TRY(Compress::CanonicalCode::from_bytes(bytes)));
+}
+
+ErrorOr<u32> CanonicalCode::read_symbol(LittleEndianInputBitStream& bit_stream) const
+{
+    return TRY(m_code.visit(
+        [](u32 single_code) -> ErrorOr<u32> { return single_code; },
+        [&bit_stream](Compress::CanonicalCode const& code) { return code.read_symbol(bit_stream); }));
+}
+
+}