--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/source/pdf/pdf-af.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,52 @@
+// Copyright (C) 2024 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#include "mupdf/fitz.h"
+#include "mupdf/pdf.h"
+
+int pdf_count_document_associated_files(fz_context *ctx, pdf_document *doc)
+{
+	pdf_obj *af = pdf_dict_getl(ctx, pdf_trailer(ctx, doc), PDF_NAME(Root), PDF_NAME(AF), NULL);
+
+	return pdf_array_len(ctx, af);
+}
+
+pdf_obj *pdf_document_associated_file(fz_context *ctx, pdf_document *doc, int idx)
+{
+	pdf_obj *af = pdf_dict_getl(ctx, pdf_trailer(ctx, doc), PDF_NAME(Root), PDF_NAME(AF), NULL);
+
+	return pdf_array_get(ctx, af, idx);
+}
+
+int pdf_count_page_associated_files(fz_context *ctx, pdf_page *page)
+{
+	pdf_obj *af = pdf_dict_get(ctx, page->obj, PDF_NAME(AF));
+
+	return pdf_array_len(ctx, af);
+}
+
+pdf_obj *pdf_page_associated_file(fz_context *ctx, pdf_page *page, int idx)
+{
+	pdf_obj *af = pdf_dict_get(ctx, page->obj, PDF_NAME(AF));
+
+	return pdf_array_get(ctx, af, idx);
+}