--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zint/backend/large.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,87 @@
+/* large.h - Handles binary manipulation of large numbers */
+
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2008-2023 Robin Stuart <rstuart114@gmail.com>
+
+    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.
+    3. Neither the name of the project nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+    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 THE COPYRIGHT OWNER OR 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.
+*/
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef Z_LARGE_H
+#define Z_LARGE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+typedef struct { uint64_t lo; uint64_t hi; } large_uint;
+
+#define large_lo(s) ((s)->lo)
+#define large_hi(s) ((s)->hi)
+
+/* Set 128-bit `t` from 128-bit `s` */
+#define large_load(t, s) do { *(t) = *(s); } while (0)
+
+/* Set 128-bit `t` from 64-bit `s` */
+#define large_load_u64(t, s) do { (t)->lo = (s); (t)->hi = 0; } while (0)
+
+/* Convert decimal string `s` of (at most) length `length` to 64-bit and place in 128-bit `t` */
+INTERNAL void large_load_str_u64(large_uint *t, const unsigned char *s, const int length);
+
+/* Add 128-bit `s` to 128-bit `t` */
+INTERNAL void large_add(large_uint *t, const large_uint *s);
+/* Add 64-bit `s` to 128-bit `t` */
+INTERNAL void large_add_u64(large_uint *t, const uint64_t s);
+
+/* Subtract 64-bit `s` from 128-bit `t` */
+INTERNAL void large_sub_u64(large_uint *t, const uint64_t s);
+
+/* Multiply 128-bit `t` by 64-bit `s` */
+INTERNAL void large_mul_u64(large_uint *t, const uint64_t s);
+
+/* Divide 128-bit dividend `t` by 64-bit divisor `v`, returning 64-bit remainder */
+INTERNAL uint64_t large_div_u64(large_uint *t, uint64_t v);
+
+/* Unset a bit (zero-based) */
+INTERNAL void large_unset_bit(large_uint *t, const int bit);
+
+/* Output large_uint into an unsigned int array of size `size`, each element containing `bits` bits */
+INTERNAL void large_uint_array(const large_uint *t, unsigned int *uint_array, const int size, int bits);
+/* As `large_uint_array()` above, except output to unsigned char array */
+INTERNAL void large_uchar_array(const large_uint *t, unsigned char *uchar_array, const int size, int bits);
+
+/* Format large_uint into buffer, which should be at least 35 chars in size */
+INTERNAL char *large_dump(const large_uint *t, char *buf);
+/* Output formatted large_uint to stdout */
+INTERNAL void large_print(const large_uint *t);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+/* vim: set ts=4 sw=4 et : */
+#endif /* Z_LARGE_H */