--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/extract/src/zip.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,69 @@
+#ifndef ARTIFEX_EXTRACT_ZIP
+#define ARTIFEX_EXTRACT_ZIP
+
+/* Only for internal use by extract code.  */
+
+#include "extract/buffer.h"
+
+#include <stddef.h>
+
+
+/*
+	Support for creating zip file content.
+
+	Content is compressed using deflate.
+
+	Unless otherwise stated, all functions return 0 on success or -1 with errno
+	set.
+*/
+
+/* Abstract handle for zipfile state. */
+typedef struct extract_zip_t extract_zip_t;
+
+
+/*
+	Creates an extract_zip_t that writes to specified buffer.
+
+	We reuse <buffer>'s allocator for zlib's allocation needs.
+
+	buffer:
+		Destination for zip file content.
+	o_zip:
+		Out-param.
+*/
+int extract_zip_open(extract_buffer_t *buffer, extract_zip_t **o_zip);
+
+/*
+	Writes specified data into the zip file.
+
+	Returns same as extract_buffer_write(): 0 on success, +1 if short write due to
+	EOF or -1 with errno set.
+
+	zip:
+		From extract_zip_open().
+	data:
+		File contents.
+	data_length:
+		Length in bytes of file contents.
+	name:
+		Name of file within the zip file.
+*/
+int extract_zip_write_file(
+		extract_zip_t *zip,
+		const void    *data,
+		size_t         data_length,
+		const char    *name);
+
+
+/*
+	Finishes writing the zip file (e.g. appends Central directory file headers
+	and End of central directory record).
+
+	Does not call extract_buffer_close().
+
+	zip:
+		From extract_zip_open().
+*/
+int extract_zip_close(extract_zip_t **pzip);
+
+#endif