--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/bbuffer.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,60 @@
+/*====================================================================*
+ -  Copyright (C) 2001 Leptonica.  All rights reserved.
+ -
+ -  Redistribution and use in source and binary forms, with or without
+ -  modification, are permitted provided that the following conditions
+ -  are met:
+ -  1. Redistributions of source code must retain the above copyright
+ -     notice, this list of conditions and the following disclaimer.
+ -  2. Redistributions in binary form must reproduce the above
+ -     copyright notice, this list of conditions and the following
+ -     disclaimer in the documentation and/or other materials
+ -     provided with the distribution.
+ -
+ -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
+ -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *====================================================================*/
+
+#ifndef  LEPTONICA_BBUFFER_H
+#define  LEPTONICA_BBUFFER_H
+
+/*!
+ * \file bbuffer.h
+ *
+ * <pre>
+ *      Expandable byte buffer for reading data in from memory and
+ *      writing data out to other memory.
+ *
+ *      This implements a queue of bytes, so data read in is put
+ *      on the "back" of the queue (i.e., the end of the byte array)
+ *      and data written out is taken from the "front" of the queue
+ *      (i.e., from an index marker "nwritten" that is initially set at
+ *      the beginning of the array.)  As usual with expandable
+ *      arrays, we keep the size of the allocated array and the
+ *      number of bytes that have been read into the array.
+ *
+ *      For implementation details, see bbuffer.c.
+ * </pre>
+ */
+
+/*! Expandable byte buffer for memory read/write operations */
+struct L_ByteBuffer
+{
+    l_int32      nalloc;       /*!< size of allocated byte array            */
+    l_int32      n;            /*!< number of bytes read into to the array  */
+    l_int32      nwritten;     /*!< number of bytes written from the array  */
+    l_uint8     *array;        /*!< byte array                              */
+};
+typedef struct L_ByteBuffer L_BBUFFER;
+
+
+#endif  /* LEPTONICA_BBUFFER_H */