--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/openjpeg/src/lib/openjp2/opj_intmath.h	Mon Sep 15 11:43:07 2025 +0200
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+/*
+ * The copyright in this software is being made available under the 2-clauses
+ * BSD License, included below. This software may be subject to other third
+ * party and contributor rights, including patent rights, and no such rights
+ * are granted under this license.
+ *
+ * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2014, Professor Benoit Macq
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux
+ * Copyright (c) 2003-2014, Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
+ * 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 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.
+ */
+#ifndef OPJ_INTMATH_H
+#define OPJ_INTMATH_H
+/**
+@file opj_intmath.h
+@brief Implementation of operations on integers (INT)
+
+The functions in OPJ_INTMATH.H have for goal to realize operations on integers.
+*/
+
+/** @defgroup OPJ_INTMATH OPJ_INTMATH - Implementation of operations on integers */
+/*@{*/
+
+/** @name Exported functions (see also openjpeg.h) */
+/*@{*/
+/* ----------------------------------------------------------------------- */
+/**
+Get the minimum of two integers
+@return Returns a if a < b else b
+*/
+static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b)
+{
+    return a < b ? a : b;
+}
+
+/**
+Get the minimum of two integers
+@return Returns a if a < b else b
+*/
+static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    return a < b ? a : b;
+}
+
+/**
+Get the maximum of two integers
+@return Returns a if a > b else b
+*/
+static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
+{
+    return (a > b) ? a : b;
+}
+
+/**
+Get the maximum of two integers
+@return Returns a if a > b else b
+*/
+static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32  a, OPJ_UINT32  b)
+{
+    return (a > b) ? a : b;
+}
+
+/**
+ Get the saturated sum of two unsigned integers
+ @return Returns saturated sum of a+b
+ */
+static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    OPJ_UINT64 sum = (OPJ_UINT64)a + (OPJ_UINT64)b;
+    return (OPJ_UINT32)(-(OPJ_INT32)(sum >> 32)) | (OPJ_UINT32)sum;
+}
+
+/**
+ Get the saturated difference of two unsigned integers
+ @return Returns saturated sum of a-b
+ */
+static INLINE OPJ_UINT32 opj_uint_subs(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    return (a >= b) ? a - b : 0;
+}
+
+/**
+Clamp an integer inside an interval
+@return
+<ul>
+<li>Returns a if (min < a < max)
+<li>Returns max if (a > max)
+<li>Returns min if (a < min)
+</ul>
+*/
+static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min,
+                                      OPJ_INT32 max)
+{
+    if (a < min) {
+        return min;
+    }
+    if (a > max) {
+        return max;
+    }
+    return a;
+}
+
+/**
+Clamp an integer inside an interval
+@return
+<ul>
+<li>Returns a if (min < a < max)
+<li>Returns max if (a > max)
+<li>Returns min if (a < min)
+</ul>
+*/
+static INLINE OPJ_INT64 opj_int64_clamp(OPJ_INT64 a, OPJ_INT64 min,
+                                        OPJ_INT64 max)
+{
+    if (a < min) {
+        return min;
+    }
+    if (a > max) {
+        return max;
+    }
+    return a;
+}
+
+/**
+@return Get absolute value of integer
+*/
+static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
+{
+    return a < 0 ? -a : a;
+}
+/**
+Divide an integer and round upwards
+@return Returns a divided by b
+*/
+static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
+{
+    assert(b);
+    return (OPJ_INT32)(((OPJ_INT64)a + b - 1) / b);
+}
+
+/**
+Divide an integer and round upwards
+@return Returns a divided by b
+*/
+static INLINE OPJ_UINT32  opj_uint_ceildiv(OPJ_UINT32  a, OPJ_UINT32  b)
+{
+    assert(b);
+    return (OPJ_UINT32)(((OPJ_UINT64)a + b - 1) / b);
+}
+
+/**
+Divide an integer and round upwards
+@return Returns a divided by b
+*/
+static INLINE OPJ_UINT32  opj_uint64_ceildiv_res_uint32(OPJ_UINT64 a,
+        OPJ_UINT64 b)
+{
+    assert(b);
+    return (OPJ_UINT32)((a + b - 1) / b);
+}
+
+/**
+Divide an integer by a power of 2 and round upwards
+@return Returns a divided by 2^b
+*/
+static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b)
+{
+    return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
+}
+
+/**
+ Divide a 64bits integer by a power of 2 and round upwards
+ @return Returns a divided by 2^b
+ */
+static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b)
+{
+    return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
+}
+
+/**
+ Divide an integer by a power of 2 and round upwards
+ @return Returns a divided by 2^b
+ */
+static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
+}
+
+/**
+Divide an integer by a power of 2 and round downwards
+@return Returns a divided by 2^b
+*/
+static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b)
+{
+    return a >> b;
+}
+
+/**
+Divide an integer by a power of 2 and round downwards
+@return Returns a divided by 2^b
+*/
+static INLINE OPJ_UINT32 opj_uint_floordivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
+{
+    return a >> b;
+}
+
+/**
+Get logarithm of an integer and round downwards
+@return Returns log2(a)
+*/
+static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
+{
+    OPJ_INT32 l;
+    for (l = 0; a > 1; l++) {
+        a >>= 1;
+    }
+    return l;
+}
+/**
+Get logarithm of an integer and round downwards
+@return Returns log2(a)
+*/
+static INLINE OPJ_UINT32  opj_uint_floorlog2(OPJ_UINT32  a)
+{
+    OPJ_UINT32  l;
+    for (l = 0; a > 1; ++l) {
+        a >>= 1;
+    }
+    return l;
+}
+
+/**
+Multiply two fixed-precision rational numbers.
+@param a
+@param b
+@return Returns a * b
+*/
+static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
+{
+#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
+    OPJ_INT64 temp = __emul(a, b);
+#else
+    OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
+#endif
+    temp += 4096;
+    assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
+    assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
+    return (OPJ_INT32)(temp >> 13);
+}
+
+static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
+{
+#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
+    OPJ_INT64 temp = __emul(a, b);
+#else
+    OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
+#endif
+    temp += 4096;
+    assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
+    assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF -
+            (OPJ_INT64)1));
+    return (OPJ_INT32)(temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
+}
+
+/**
+Addition two signed integers with a wrap-around behaviour.
+Assumes complement-to-two signed integers.
+@param a
+@param b
+@return Returns a + b
+*/
+static INLINE OPJ_INT32 opj_int_add_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
+{
+    void* pa = &a;
+    void* pb = &b;
+    OPJ_UINT32* upa = (OPJ_UINT32*)pa;
+    OPJ_UINT32* upb = (OPJ_UINT32*)pb;
+    OPJ_UINT32 ures = *upa + *upb;
+    void* pures = &ures;
+    OPJ_INT32* ipres = (OPJ_INT32*)pures;
+    return *ipres;
+}
+
+/**
+Subtract two signed integers with a wrap-around behaviour.
+Assumes complement-to-two signed integers.
+@param a
+@param b
+@return Returns a - b
+*/
+static INLINE OPJ_INT32 opj_int_sub_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
+{
+    void* pa = &a;
+    void* pb = &b;
+    OPJ_UINT32* upa = (OPJ_UINT32*)pa;
+    OPJ_UINT32* upb = (OPJ_UINT32*)pb;
+    OPJ_UINT32 ures = *upa - *upb;
+    void* pures = &ures;
+    OPJ_INT32* ipres = (OPJ_INT32*)pures;
+    return *ipres;
+}
+
+/* ----------------------------------------------------------------------- */
+/*@}*/
+
+/*@}*/
+
+#endif /* OPJ_INTMATH_H */