--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zint/backend/reedsol.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,79 @@
+/*
+    This is a simple Reed-Solomon encoder
+    (C) Cliff Hones 2004
+*/
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2009-2022 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_REEDSOL_H
+#define Z_REEDSOL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+typedef struct {
+    const unsigned char *logt; /* These are static */
+    const unsigned char *alog;
+    unsigned char rspoly[256]; /* Generated poly */
+    unsigned char log_rspoly[256]; /* Logs of poly */
+    int nsym; /* Degree of poly */
+    int zero; /* Set if poly has a zero coeff */
+} rs_t;
+
+typedef struct {
+    unsigned int *logt; /* These are malloced */
+    unsigned int *alog;
+    unsigned short rspoly[4096]; /* Generated poly, 12-bit max - needs to be enlarged if > 12-bit used */
+    unsigned int log_rspoly[4096]; /* Logs of poly */
+    int nsym; /* Degree of poly */
+    int zero; /* Set if poly has a zero coeff */
+} rs_uint_t;
+
+INTERNAL void rs_init_gf(rs_t *rs, const unsigned int prime_poly);
+INTERNAL void rs_init_code(rs_t *rs, const int nsym, int index);
+INTERNAL void rs_encode(const rs_t *rs, const int datalen, const unsigned char *data, unsigned char *res);
+INTERNAL void rs_encode_uint(const rs_t *rs, const int datalen, const unsigned int *data, unsigned int *res);
+/* No free needed as log tables static */
+
+INTERNAL int rs_uint_init_gf(rs_uint_t *rs_uint, const unsigned int prime_poly, const int logmod);
+INTERNAL void rs_uint_init_code(rs_uint_t *rs_uint, const int nsym, int index);
+INTERNAL void rs_uint_encode(const rs_uint_t *rs_uint, const int datalen, const unsigned int *data,
+                unsigned int *res);
+INTERNAL void rs_uint_free(rs_uint_t *rs_uint);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+/* vim: set ts=4 sw=4 et : */
+#endif /* Z_REEDSOL_H */