--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/mujs/jsmath.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,194 @@
+#include "jsi.h"
+
+#if defined(_MSC_VER) && (_MSC_VER < 1700) /* VS2012 has stdint.h */
+typedef unsigned int uint32_t;
+typedef unsigned __int64 uint64_t;
+#else
+#include <stdint.h>
+#endif
+
+#include <time.h>
+
+static double jsM_round(double x)
+{
+	if (isnan(x)) return x;
+	if (isinf(x)) return x;
+	if (x == 0) return x;
+	if (x > 0 && x < 0.5) return 0;
+	if (x < 0 && x >= -0.5) return -0;
+	return floor(x + 0.5);
+}
+
+static void Math_abs(js_State *J)
+{
+	js_pushnumber(J, fabs(js_tonumber(J, 1)));
+}
+
+static void Math_acos(js_State *J)
+{
+	js_pushnumber(J, acos(js_tonumber(J, 1)));
+}
+
+static void Math_asin(js_State *J)
+{
+	js_pushnumber(J, asin(js_tonumber(J, 1)));
+}
+
+static void Math_atan(js_State *J)
+{
+	js_pushnumber(J, atan(js_tonumber(J, 1)));
+}
+
+static void Math_atan2(js_State *J)
+{
+	double y = js_tonumber(J, 1);
+	double x = js_tonumber(J, 2);
+	js_pushnumber(J, atan2(y, x));
+}
+
+static void Math_ceil(js_State *J)
+{
+	js_pushnumber(J, ceil(js_tonumber(J, 1)));
+}
+
+static void Math_cos(js_State *J)
+{
+	js_pushnumber(J, cos(js_tonumber(J, 1)));
+}
+
+static void Math_exp(js_State *J)
+{
+	js_pushnumber(J, exp(js_tonumber(J, 1)));
+}
+
+static void Math_floor(js_State *J)
+{
+	js_pushnumber(J, floor(js_tonumber(J, 1)));
+}
+
+static void Math_log(js_State *J)
+{
+	js_pushnumber(J, log(js_tonumber(J, 1)));
+}
+
+static void Math_pow(js_State *J)
+{
+	double x = js_tonumber(J, 1);
+	double y = js_tonumber(J, 2);
+	if (!isfinite(y) && fabs(x) == 1)
+		js_pushnumber(J, NAN);
+	else
+		js_pushnumber(J, pow(x,y));
+}
+
+static void Math_random(js_State *J)
+{
+	/* Lehmer generator with a=48271 and m=2^31-1 */
+	/* Park & Miller (1988). Random Number Generators: Good ones are hard to find. */
+	J->seed = (uint64_t) J->seed * 48271 % 0x7fffffff;
+	js_pushnumber(J, (double) J->seed / 0x7fffffff);
+}
+
+static void Math_init_random(js_State *J)
+{
+	/* Pick initial seed by scrambling current time with Xorshift. */
+	/* Marsaglia (2003). Xorshift RNGs. */
+	J->seed = time(0) + 123;
+	J->seed ^= J->seed << 13;
+	J->seed ^= J->seed >> 17;
+	J->seed ^= J->seed << 5;
+	J->seed %= 0x7fffffff;
+}
+
+static void Math_round(js_State *J)
+{
+	double x = js_tonumber(J, 1);
+	js_pushnumber(J, jsM_round(x));
+}
+
+static void Math_sin(js_State *J)
+{
+	js_pushnumber(J, sin(js_tonumber(J, 1)));
+}
+
+static void Math_sqrt(js_State *J)
+{
+	js_pushnumber(J, sqrt(js_tonumber(J, 1)));
+}
+
+static void Math_tan(js_State *J)
+{
+	js_pushnumber(J, tan(js_tonumber(J, 1)));
+}
+
+static void Math_max(js_State *J)
+{
+	int i, n = js_gettop(J);
+	double x = -INFINITY;
+	for (i = 1; i < n; ++i) {
+		double y = js_tonumber(J, i);
+		if (isnan(y)) {
+			x = y;
+			break;
+		}
+		if (signbit(x) == signbit(y))
+			x = x > y ? x : y;
+		else if (signbit(x))
+			x = y;
+	}
+	js_pushnumber(J, x);
+}
+
+static void Math_min(js_State *J)
+{
+	int i, n = js_gettop(J);
+	double x = INFINITY;
+	for (i = 1; i < n; ++i) {
+		double y = js_tonumber(J, i);
+		if (isnan(y)) {
+			x = y;
+			break;
+		}
+		if (signbit(x) == signbit(y))
+			x = x < y ? x : y;
+		else if (signbit(y))
+			x = y;
+	}
+	js_pushnumber(J, x);
+}
+
+void jsB_initmath(js_State *J)
+{
+	Math_init_random(J);
+	js_pushobject(J, jsV_newobject(J, JS_CMATH, J->Object_prototype));
+	{
+		jsB_propn(J, "E", 2.7182818284590452354);
+		jsB_propn(J, "LN10", 2.302585092994046);
+		jsB_propn(J, "LN2", 0.6931471805599453);
+		jsB_propn(J, "LOG2E", 1.4426950408889634);
+		jsB_propn(J, "LOG10E", 0.4342944819032518);
+		jsB_propn(J, "PI", 3.1415926535897932);
+		jsB_propn(J, "SQRT1_2", 0.7071067811865476);
+		jsB_propn(J, "SQRT2", 1.4142135623730951);
+
+		jsB_propf(J, "Math.abs", Math_abs, 1);
+		jsB_propf(J, "Math.acos", Math_acos, 1);
+		jsB_propf(J, "Math.asin", Math_asin, 1);
+		jsB_propf(J, "Math.atan", Math_atan, 1);
+		jsB_propf(J, "Math.atan2", Math_atan2, 2);
+		jsB_propf(J, "Math.ceil", Math_ceil, 1);
+		jsB_propf(J, "Math.cos", Math_cos, 1);
+		jsB_propf(J, "Math.exp", Math_exp, 1);
+		jsB_propf(J, "Math.floor", Math_floor, 1);
+		jsB_propf(J, "Math.log", Math_log, 1);
+		jsB_propf(J, "Math.max", Math_max, 0); /* 2 */
+		jsB_propf(J, "Math.min", Math_min, 0); /* 2 */
+		jsB_propf(J, "Math.pow", Math_pow, 2);
+		jsB_propf(J, "Math.random", Math_random, 0);
+		jsB_propf(J, "Math.round", Math_round, 1);
+		jsB_propf(J, "Math.sin", Math_sin, 1);
+		jsB_propf(J, "Math.sqrt", Math_sqrt, 1);
+		jsB_propf(J, "Math.tan", Math_tan, 1);
+	}
+	js_defglobal(J, "Math", JS_DONTENUM);
+}