1.1 --- a/emul/mini/src/main/java/java/lang/Math.java Fri Mar 22 16:59:47 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,1310 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package java.lang;
1.30 -
1.31 -import org.apidesign.bck2brwsr.core.JavaScriptBody;
1.32 -
1.33 -
1.34 -/**
1.35 - * The class {@code Math} contains methods for performing basic
1.36 - * numeric operations such as the elementary exponential, logarithm,
1.37 - * square root, and trigonometric functions.
1.38 - *
1.39 - * <p>Unlike some of the numeric methods of class
1.40 - * {@code StrictMath}, all implementations of the equivalent
1.41 - * functions of class {@code Math} are not defined to return the
1.42 - * bit-for-bit same results. This relaxation permits
1.43 - * better-performing implementations where strict reproducibility is
1.44 - * not required.
1.45 - *
1.46 - * <p>By default many of the {@code Math} methods simply call
1.47 - * the equivalent method in {@code StrictMath} for their
1.48 - * implementation. Code generators are encouraged to use
1.49 - * platform-specific native libraries or microprocessor instructions,
1.50 - * where available, to provide higher-performance implementations of
1.51 - * {@code Math} methods. Such higher-performance
1.52 - * implementations still must conform to the specification for
1.53 - * {@code Math}.
1.54 - *
1.55 - * <p>The quality of implementation specifications concern two
1.56 - * properties, accuracy of the returned result and monotonicity of the
1.57 - * method. Accuracy of the floating-point {@code Math} methods
1.58 - * is measured in terms of <i>ulps</i>, units in the last place. For
1.59 - * a given floating-point format, an ulp of a specific real number
1.60 - * value is the distance between the two floating-point values
1.61 - * bracketing that numerical value. When discussing the accuracy of a
1.62 - * method as a whole rather than at a specific argument, the number of
1.63 - * ulps cited is for the worst-case error at any argument. If a
1.64 - * method always has an error less than 0.5 ulps, the method always
1.65 - * returns the floating-point number nearest the exact result; such a
1.66 - * method is <i>correctly rounded</i>. A correctly rounded method is
1.67 - * generally the best a floating-point approximation can be; however,
1.68 - * it is impractical for many floating-point methods to be correctly
1.69 - * rounded. Instead, for the {@code Math} class, a larger error
1.70 - * bound of 1 or 2 ulps is allowed for certain methods. Informally,
1.71 - * with a 1 ulp error bound, when the exact result is a representable
1.72 - * number, the exact result should be returned as the computed result;
1.73 - * otherwise, either of the two floating-point values which bracket
1.74 - * the exact result may be returned. For exact results large in
1.75 - * magnitude, one of the endpoints of the bracket may be infinite.
1.76 - * Besides accuracy at individual arguments, maintaining proper
1.77 - * relations between the method at different arguments is also
1.78 - * important. Therefore, most methods with more than 0.5 ulp errors
1.79 - * are required to be <i>semi-monotonic</i>: whenever the mathematical
1.80 - * function is non-decreasing, so is the floating-point approximation,
1.81 - * likewise, whenever the mathematical function is non-increasing, so
1.82 - * is the floating-point approximation. Not all approximations that
1.83 - * have 1 ulp accuracy will automatically meet the monotonicity
1.84 - * requirements.
1.85 - *
1.86 - * @author unascribed
1.87 - * @author Joseph D. Darcy
1.88 - * @since JDK1.0
1.89 - */
1.90 -
1.91 -public final class Math {
1.92 -
1.93 - /**
1.94 - * Don't let anyone instantiate this class.
1.95 - */
1.96 - private Math() {}
1.97 -
1.98 - /**
1.99 - * The {@code double} value that is closer than any other to
1.100 - * <i>e</i>, the base of the natural logarithms.
1.101 - */
1.102 - public static final double E = 2.7182818284590452354;
1.103 -
1.104 - /**
1.105 - * The {@code double} value that is closer than any other to
1.106 - * <i>pi</i>, the ratio of the circumference of a circle to its
1.107 - * diameter.
1.108 - */
1.109 - public static final double PI = 3.14159265358979323846;
1.110 -
1.111 - /**
1.112 - * Returns the trigonometric sine of an angle. Special cases:
1.113 - * <ul><li>If the argument is NaN or an infinity, then the
1.114 - * result is NaN.
1.115 - * <li>If the argument is zero, then the result is a zero with the
1.116 - * same sign as the argument.</ul>
1.117 - *
1.118 - * <p>The computed result must be within 1 ulp of the exact result.
1.119 - * Results must be semi-monotonic.
1.120 - *
1.121 - * @param a an angle, in radians.
1.122 - * @return the sine of the argument.
1.123 - */
1.124 - @JavaScriptBody(args="a", body="return Math.sin(a);")
1.125 - public static double sin(double a) {
1.126 - throw new UnsupportedOperationException();
1.127 - }
1.128 -
1.129 - /**
1.130 - * Returns the trigonometric cosine of an angle. Special cases:
1.131 - * <ul><li>If the argument is NaN or an infinity, then the
1.132 - * result is NaN.</ul>
1.133 - *
1.134 - * <p>The computed result must be within 1 ulp of the exact result.
1.135 - * Results must be semi-monotonic.
1.136 - *
1.137 - * @param a an angle, in radians.
1.138 - * @return the cosine of the argument.
1.139 - */
1.140 - @JavaScriptBody(args="a", body="return Math.cos(a);")
1.141 - public static double cos(double a) {
1.142 - throw new UnsupportedOperationException();
1.143 - }
1.144 -
1.145 - /**
1.146 - * Returns the trigonometric tangent of an angle. Special cases:
1.147 - * <ul><li>If the argument is NaN or an infinity, then the result
1.148 - * is NaN.
1.149 - * <li>If the argument is zero, then the result is a zero with the
1.150 - * same sign as the argument.</ul>
1.151 - *
1.152 - * <p>The computed result must be within 1 ulp of the exact result.
1.153 - * Results must be semi-monotonic.
1.154 - *
1.155 - * @param a an angle, in radians.
1.156 - * @return the tangent of the argument.
1.157 - */
1.158 - @JavaScriptBody(args="a", body="return Math.tan(a);")
1.159 - public static double tan(double a) {
1.160 - throw new UnsupportedOperationException();
1.161 - }
1.162 -
1.163 - /**
1.164 - * Returns the arc sine of a value; the returned angle is in the
1.165 - * range -<i>pi</i>/2 through <i>pi</i>/2. Special cases:
1.166 - * <ul><li>If the argument is NaN or its absolute value is greater
1.167 - * than 1, then the result is NaN.
1.168 - * <li>If the argument is zero, then the result is a zero with the
1.169 - * same sign as the argument.</ul>
1.170 - *
1.171 - * <p>The computed result must be within 1 ulp of the exact result.
1.172 - * Results must be semi-monotonic.
1.173 - *
1.174 - * @param a the value whose arc sine is to be returned.
1.175 - * @return the arc sine of the argument.
1.176 - */
1.177 - @JavaScriptBody(args="a", body="return Math.asin(a);")
1.178 - public static double asin(double a) {
1.179 - throw new UnsupportedOperationException();
1.180 - }
1.181 -
1.182 - /**
1.183 - * Returns the arc cosine of a value; the returned angle is in the
1.184 - * range 0.0 through <i>pi</i>. Special case:
1.185 - * <ul><li>If the argument is NaN or its absolute value is greater
1.186 - * than 1, then the result is NaN.</ul>
1.187 - *
1.188 - * <p>The computed result must be within 1 ulp of the exact result.
1.189 - * Results must be semi-monotonic.
1.190 - *
1.191 - * @param a the value whose arc cosine is to be returned.
1.192 - * @return the arc cosine of the argument.
1.193 - */
1.194 - @JavaScriptBody(args="a", body="return Math.acos(a);")
1.195 - public static double acos(double a) {
1.196 - throw new UnsupportedOperationException();
1.197 - }
1.198 -
1.199 - /**
1.200 - * Returns the arc tangent of a value; the returned angle is in the
1.201 - * range -<i>pi</i>/2 through <i>pi</i>/2. Special cases:
1.202 - * <ul><li>If the argument is NaN, then the result is NaN.
1.203 - * <li>If the argument is zero, then the result is a zero with the
1.204 - * same sign as the argument.</ul>
1.205 - *
1.206 - * <p>The computed result must be within 1 ulp of the exact result.
1.207 - * Results must be semi-monotonic.
1.208 - *
1.209 - * @param a the value whose arc tangent is to be returned.
1.210 - * @return the arc tangent of the argument.
1.211 - */
1.212 - @JavaScriptBody(args="a", body="return Math.atan(a);")
1.213 - public static double atan(double a) {
1.214 - throw new UnsupportedOperationException();
1.215 - }
1.216 -
1.217 - /**
1.218 - * Converts an angle measured in degrees to an approximately
1.219 - * equivalent angle measured in radians. The conversion from
1.220 - * degrees to radians is generally inexact.
1.221 - *
1.222 - * @param angdeg an angle, in degrees
1.223 - * @return the measurement of the angle {@code angdeg}
1.224 - * in radians.
1.225 - * @since 1.2
1.226 - */
1.227 - public static double toRadians(double angdeg) {
1.228 - return angdeg / 180.0 * PI;
1.229 - }
1.230 -
1.231 - /**
1.232 - * Converts an angle measured in radians to an approximately
1.233 - * equivalent angle measured in degrees. The conversion from
1.234 - * radians to degrees is generally inexact; users should
1.235 - * <i>not</i> expect {@code cos(toRadians(90.0))} to exactly
1.236 - * equal {@code 0.0}.
1.237 - *
1.238 - * @param angrad an angle, in radians
1.239 - * @return the measurement of the angle {@code angrad}
1.240 - * in degrees.
1.241 - * @since 1.2
1.242 - */
1.243 - public static double toDegrees(double angrad) {
1.244 - return angrad * 180.0 / PI;
1.245 - }
1.246 -
1.247 - /**
1.248 - * Returns Euler's number <i>e</i> raised to the power of a
1.249 - * {@code double} value. Special cases:
1.250 - * <ul><li>If the argument is NaN, the result is NaN.
1.251 - * <li>If the argument is positive infinity, then the result is
1.252 - * positive infinity.
1.253 - * <li>If the argument is negative infinity, then the result is
1.254 - * positive zero.</ul>
1.255 - *
1.256 - * <p>The computed result must be within 1 ulp of the exact result.
1.257 - * Results must be semi-monotonic.
1.258 - *
1.259 - * @param a the exponent to raise <i>e</i> to.
1.260 - * @return the value <i>e</i><sup>{@code a}</sup>,
1.261 - * where <i>e</i> is the base of the natural logarithms.
1.262 - */
1.263 - @JavaScriptBody(args="a", body="return Math.exp(a);")
1.264 - public static double exp(double a) {
1.265 - throw new UnsupportedOperationException();
1.266 - }
1.267 -
1.268 - /**
1.269 - * Returns the natural logarithm (base <i>e</i>) of a {@code double}
1.270 - * value. Special cases:
1.271 - * <ul><li>If the argument is NaN or less than zero, then the result
1.272 - * is NaN.
1.273 - * <li>If the argument is positive infinity, then the result is
1.274 - * positive infinity.
1.275 - * <li>If the argument is positive zero or negative zero, then the
1.276 - * result is negative infinity.</ul>
1.277 - *
1.278 - * <p>The computed result must be within 1 ulp of the exact result.
1.279 - * Results must be semi-monotonic.
1.280 - *
1.281 - * @param a a value
1.282 - * @return the value ln {@code a}, the natural logarithm of
1.283 - * {@code a}.
1.284 - */
1.285 - @JavaScriptBody(args="a", body="return Math.log(a);")
1.286 - public static double log(double a) {
1.287 - throw new UnsupportedOperationException();
1.288 - }
1.289 -
1.290 - /**
1.291 - * Returns the base 10 logarithm of a {@code double} value.
1.292 - * Special cases:
1.293 - *
1.294 - * <ul><li>If the argument is NaN or less than zero, then the result
1.295 - * is NaN.
1.296 - * <li>If the argument is positive infinity, then the result is
1.297 - * positive infinity.
1.298 - * <li>If the argument is positive zero or negative zero, then the
1.299 - * result is negative infinity.
1.300 - * <li> If the argument is equal to 10<sup><i>n</i></sup> for
1.301 - * integer <i>n</i>, then the result is <i>n</i>.
1.302 - * </ul>
1.303 - *
1.304 - * <p>The computed result must be within 1 ulp of the exact result.
1.305 - * Results must be semi-monotonic.
1.306 - *
1.307 - * @param a a value
1.308 - * @return the base 10 logarithm of {@code a}.
1.309 - * @since 1.5
1.310 - */
1.311 - @JavaScriptBody(args="a", body="return Math.log(a) / Math.LN10;")
1.312 - public static double log10(double a) {
1.313 - throw new UnsupportedOperationException();
1.314 - }
1.315 -
1.316 - /**
1.317 - * Returns the correctly rounded positive square root of a
1.318 - * {@code double} value.
1.319 - * Special cases:
1.320 - * <ul><li>If the argument is NaN or less than zero, then the result
1.321 - * is NaN.
1.322 - * <li>If the argument is positive infinity, then the result is positive
1.323 - * infinity.
1.324 - * <li>If the argument is positive zero or negative zero, then the
1.325 - * result is the same as the argument.</ul>
1.326 - * Otherwise, the result is the {@code double} value closest to
1.327 - * the true mathematical square root of the argument value.
1.328 - *
1.329 - * @param a a value.
1.330 - * @return the positive square root of {@code a}.
1.331 - * If the argument is NaN or less than zero, the result is NaN.
1.332 - */
1.333 - @JavaScriptBody(args="a", body="return Math.sqrt(a);")
1.334 - public static double sqrt(double a) {
1.335 - throw new UnsupportedOperationException();
1.336 - }
1.337 -
1.338 - /**
1.339 - * Returns the smallest (closest to negative infinity)
1.340 - * {@code double} value that is greater than or equal to the
1.341 - * argument and is equal to a mathematical integer. Special cases:
1.342 - * <ul><li>If the argument value is already equal to a
1.343 - * mathematical integer, then the result is the same as the
1.344 - * argument. <li>If the argument is NaN or an infinity or
1.345 - * positive zero or negative zero, then the result is the same as
1.346 - * the argument. <li>If the argument value is less than zero but
1.347 - * greater than -1.0, then the result is negative zero.</ul> Note
1.348 - * that the value of {@code Math.ceil(x)} is exactly the
1.349 - * value of {@code -Math.floor(-x)}.
1.350 - *
1.351 - *
1.352 - * @param a a value.
1.353 - * @return the smallest (closest to negative infinity)
1.354 - * floating-point value that is greater than or equal to
1.355 - * the argument and is equal to a mathematical integer.
1.356 - */
1.357 - @JavaScriptBody(args="a", body="return Math.ceil(a);")
1.358 - public static double ceil(double a) {
1.359 - throw new UnsupportedOperationException();
1.360 - }
1.361 -
1.362 - /**
1.363 - * Returns the largest (closest to positive infinity)
1.364 - * {@code double} value that is less than or equal to the
1.365 - * argument and is equal to a mathematical integer. Special cases:
1.366 - * <ul><li>If the argument value is already equal to a
1.367 - * mathematical integer, then the result is the same as the
1.368 - * argument. <li>If the argument is NaN or an infinity or
1.369 - * positive zero or negative zero, then the result is the same as
1.370 - * the argument.</ul>
1.371 - *
1.372 - * @param a a value.
1.373 - * @return the largest (closest to positive infinity)
1.374 - * floating-point value that less than or equal to the argument
1.375 - * and is equal to a mathematical integer.
1.376 - */
1.377 - @JavaScriptBody(args="a", body="return Math.floor(a);")
1.378 - public static double floor(double a) {
1.379 - throw new UnsupportedOperationException();
1.380 - }
1.381 - /**
1.382 - * Computes the remainder operation on two arguments as prescribed
1.383 - * by the IEEE 754 standard.
1.384 - * The remainder value is mathematically equal to
1.385 - * <code>f1 - f2</code> × <i>n</i>,
1.386 - * where <i>n</i> is the mathematical integer closest to the exact
1.387 - * mathematical value of the quotient {@code f1/f2}, and if two
1.388 - * mathematical integers are equally close to {@code f1/f2},
1.389 - * then <i>n</i> is the integer that is even. If the remainder is
1.390 - * zero, its sign is the same as the sign of the first argument.
1.391 - * Special cases:
1.392 - * <ul><li>If either argument is NaN, or the first argument is infinite,
1.393 - * or the second argument is positive zero or negative zero, then the
1.394 - * result is NaN.
1.395 - * <li>If the first argument is finite and the second argument is
1.396 - * infinite, then the result is the same as the first argument.</ul>
1.397 - *
1.398 - * @param f1 the dividend.
1.399 - * @param f2 the divisor.
1.400 - * @return the remainder when {@code f1} is divided by
1.401 - * {@code f2}.
1.402 - */
1.403 - public static double IEEEremainder(double f1, double f2) {
1.404 - return f1 - (f2 * Math.round(f1 / f2));
1.405 - }
1.406 -
1.407 - /**
1.408 - * Returns the {@code double} value that is closest in value
1.409 - * to the argument and is equal to a mathematical integer. If two
1.410 - * {@code double} values that are mathematical integers are
1.411 - * equally close, the result is the integer value that is
1.412 - * even. Special cases:
1.413 - * <ul><li>If the argument value is already equal to a mathematical
1.414 - * integer, then the result is the same as the argument.
1.415 - * <li>If the argument is NaN or an infinity or positive zero or negative
1.416 - * zero, then the result is the same as the argument.</ul>
1.417 - *
1.418 - * @param a a {@code double} value.
1.419 - * @return the closest floating-point value to {@code a} that is
1.420 - * equal to a mathematical integer.
1.421 - */
1.422 - public static double rint(double a) {
1.423 - double ceil = ceil(a);
1.424 - double floor = floor(a);
1.425 -
1.426 - double dc = ceil - a;
1.427 - double df = a - floor;
1.428 -
1.429 - if (dc < df) {
1.430 - return ceil;
1.431 - } else if (dc > df) {
1.432 - return floor;
1.433 - }
1.434 -
1.435 - int tenC = (int) (ceil % 10.0);
1.436 -
1.437 - if (tenC % 2 == 0) {
1.438 - return ceil;
1.439 - } else {
1.440 - return floor;
1.441 - }
1.442 - }
1.443 -
1.444 - /**
1.445 - * Returns the angle <i>theta</i> from the conversion of rectangular
1.446 - * coordinates ({@code x}, {@code y}) to polar
1.447 - * coordinates (r, <i>theta</i>).
1.448 - * This method computes the phase <i>theta</i> by computing an arc tangent
1.449 - * of {@code y/x} in the range of -<i>pi</i> to <i>pi</i>. Special
1.450 - * cases:
1.451 - * <ul><li>If either argument is NaN, then the result is NaN.
1.452 - * <li>If the first argument is positive zero and the second argument
1.453 - * is positive, or the first argument is positive and finite and the
1.454 - * second argument is positive infinity, then the result is positive
1.455 - * zero.
1.456 - * <li>If the first argument is negative zero and the second argument
1.457 - * is positive, or the first argument is negative and finite and the
1.458 - * second argument is positive infinity, then the result is negative zero.
1.459 - * <li>If the first argument is positive zero and the second argument
1.460 - * is negative, or the first argument is positive and finite and the
1.461 - * second argument is negative infinity, then the result is the
1.462 - * {@code double} value closest to <i>pi</i>.
1.463 - * <li>If the first argument is negative zero and the second argument
1.464 - * is negative, or the first argument is negative and finite and the
1.465 - * second argument is negative infinity, then the result is the
1.466 - * {@code double} value closest to -<i>pi</i>.
1.467 - * <li>If the first argument is positive and the second argument is
1.468 - * positive zero or negative zero, or the first argument is positive
1.469 - * infinity and the second argument is finite, then the result is the
1.470 - * {@code double} value closest to <i>pi</i>/2.
1.471 - * <li>If the first argument is negative and the second argument is
1.472 - * positive zero or negative zero, or the first argument is negative
1.473 - * infinity and the second argument is finite, then the result is the
1.474 - * {@code double} value closest to -<i>pi</i>/2.
1.475 - * <li>If both arguments are positive infinity, then the result is the
1.476 - * {@code double} value closest to <i>pi</i>/4.
1.477 - * <li>If the first argument is positive infinity and the second argument
1.478 - * is negative infinity, then the result is the {@code double}
1.479 - * value closest to 3*<i>pi</i>/4.
1.480 - * <li>If the first argument is negative infinity and the second argument
1.481 - * is positive infinity, then the result is the {@code double} value
1.482 - * closest to -<i>pi</i>/4.
1.483 - * <li>If both arguments are negative infinity, then the result is the
1.484 - * {@code double} value closest to -3*<i>pi</i>/4.</ul>
1.485 - *
1.486 - * <p>The computed result must be within 2 ulps of the exact result.
1.487 - * Results must be semi-monotonic.
1.488 - *
1.489 - * @param y the ordinate coordinate
1.490 - * @param x the abscissa coordinate
1.491 - * @return the <i>theta</i> component of the point
1.492 - * (<i>r</i>, <i>theta</i>)
1.493 - * in polar coordinates that corresponds to the point
1.494 - * (<i>x</i>, <i>y</i>) in Cartesian coordinates.
1.495 - */
1.496 - @JavaScriptBody(args={"y", "x"}, body="return Math.atan2(y, x);")
1.497 - public static double atan2(double y, double x) {
1.498 - throw new UnsupportedOperationException();
1.499 - }
1.500 -
1.501 - /**
1.502 - * Returns the value of the first argument raised to the power of the
1.503 - * second argument. Special cases:
1.504 - *
1.505 - * <ul><li>If the second argument is positive or negative zero, then the
1.506 - * result is 1.0.
1.507 - * <li>If the second argument is 1.0, then the result is the same as the
1.508 - * first argument.
1.509 - * <li>If the second argument is NaN, then the result is NaN.
1.510 - * <li>If the first argument is NaN and the second argument is nonzero,
1.511 - * then the result is NaN.
1.512 - *
1.513 - * <li>If
1.514 - * <ul>
1.515 - * <li>the absolute value of the first argument is greater than 1
1.516 - * and the second argument is positive infinity, or
1.517 - * <li>the absolute value of the first argument is less than 1 and
1.518 - * the second argument is negative infinity,
1.519 - * </ul>
1.520 - * then the result is positive infinity.
1.521 - *
1.522 - * <li>If
1.523 - * <ul>
1.524 - * <li>the absolute value of the first argument is greater than 1 and
1.525 - * the second argument is negative infinity, or
1.526 - * <li>the absolute value of the
1.527 - * first argument is less than 1 and the second argument is positive
1.528 - * infinity,
1.529 - * </ul>
1.530 - * then the result is positive zero.
1.531 - *
1.532 - * <li>If the absolute value of the first argument equals 1 and the
1.533 - * second argument is infinite, then the result is NaN.
1.534 - *
1.535 - * <li>If
1.536 - * <ul>
1.537 - * <li>the first argument is positive zero and the second argument
1.538 - * is greater than zero, or
1.539 - * <li>the first argument is positive infinity and the second
1.540 - * argument is less than zero,
1.541 - * </ul>
1.542 - * then the result is positive zero.
1.543 - *
1.544 - * <li>If
1.545 - * <ul>
1.546 - * <li>the first argument is positive zero and the second argument
1.547 - * is less than zero, or
1.548 - * <li>the first argument is positive infinity and the second
1.549 - * argument is greater than zero,
1.550 - * </ul>
1.551 - * then the result is positive infinity.
1.552 - *
1.553 - * <li>If
1.554 - * <ul>
1.555 - * <li>the first argument is negative zero and the second argument
1.556 - * is greater than zero but not a finite odd integer, or
1.557 - * <li>the first argument is negative infinity and the second
1.558 - * argument is less than zero but not a finite odd integer,
1.559 - * </ul>
1.560 - * then the result is positive zero.
1.561 - *
1.562 - * <li>If
1.563 - * <ul>
1.564 - * <li>the first argument is negative zero and the second argument
1.565 - * is a positive finite odd integer, or
1.566 - * <li>the first argument is negative infinity and the second
1.567 - * argument is a negative finite odd integer,
1.568 - * </ul>
1.569 - * then the result is negative zero.
1.570 - *
1.571 - * <li>If
1.572 - * <ul>
1.573 - * <li>the first argument is negative zero and the second argument
1.574 - * is less than zero but not a finite odd integer, or
1.575 - * <li>the first argument is negative infinity and the second
1.576 - * argument is greater than zero but not a finite odd integer,
1.577 - * </ul>
1.578 - * then the result is positive infinity.
1.579 - *
1.580 - * <li>If
1.581 - * <ul>
1.582 - * <li>the first argument is negative zero and the second argument
1.583 - * is a negative finite odd integer, or
1.584 - * <li>the first argument is negative infinity and the second
1.585 - * argument is a positive finite odd integer,
1.586 - * </ul>
1.587 - * then the result is negative infinity.
1.588 - *
1.589 - * <li>If the first argument is finite and less than zero
1.590 - * <ul>
1.591 - * <li> if the second argument is a finite even integer, the
1.592 - * result is equal to the result of raising the absolute value of
1.593 - * the first argument to the power of the second argument
1.594 - *
1.595 - * <li>if the second argument is a finite odd integer, the result
1.596 - * is equal to the negative of the result of raising the absolute
1.597 - * value of the first argument to the power of the second
1.598 - * argument
1.599 - *
1.600 - * <li>if the second argument is finite and not an integer, then
1.601 - * the result is NaN.
1.602 - * </ul>
1.603 - *
1.604 - * <li>If both arguments are integers, then the result is exactly equal
1.605 - * to the mathematical result of raising the first argument to the power
1.606 - * of the second argument if that result can in fact be represented
1.607 - * exactly as a {@code double} value.</ul>
1.608 - *
1.609 - * <p>(In the foregoing descriptions, a floating-point value is
1.610 - * considered to be an integer if and only if it is finite and a
1.611 - * fixed point of the method {@link #ceil ceil} or,
1.612 - * equivalently, a fixed point of the method {@link #floor
1.613 - * floor}. A value is a fixed point of a one-argument
1.614 - * method if and only if the result of applying the method to the
1.615 - * value is equal to the value.)
1.616 - *
1.617 - * <p>The computed result must be within 1 ulp of the exact result.
1.618 - * Results must be semi-monotonic.
1.619 - *
1.620 - * @param a the base.
1.621 - * @param b the exponent.
1.622 - * @return the value {@code a}<sup>{@code b}</sup>.
1.623 - */
1.624 - @JavaScriptBody(args={"a", "b"}, body="return Math.pow(a, b);")
1.625 - public static double pow(double a, double b) {
1.626 - throw new UnsupportedOperationException();
1.627 - }
1.628 -
1.629 - /**
1.630 - * Returns the closest {@code int} to the argument, with ties
1.631 - * rounding up.
1.632 - *
1.633 - * <p>
1.634 - * Special cases:
1.635 - * <ul><li>If the argument is NaN, the result is 0.
1.636 - * <li>If the argument is negative infinity or any value less than or
1.637 - * equal to the value of {@code Integer.MIN_VALUE}, the result is
1.638 - * equal to the value of {@code Integer.MIN_VALUE}.
1.639 - * <li>If the argument is positive infinity or any value greater than or
1.640 - * equal to the value of {@code Integer.MAX_VALUE}, the result is
1.641 - * equal to the value of {@code Integer.MAX_VALUE}.</ul>
1.642 - *
1.643 - * @param a a floating-point value to be rounded to an integer.
1.644 - * @return the value of the argument rounded to the nearest
1.645 - * {@code int} value.
1.646 - * @see java.lang.Integer#MAX_VALUE
1.647 - * @see java.lang.Integer#MIN_VALUE
1.648 - */
1.649 - @JavaScriptBody(args="a", body="return Math.round(a);")
1.650 - public static int round(float a) {
1.651 - throw new UnsupportedOperationException();
1.652 - }
1.653 -
1.654 - /**
1.655 - * Returns the closest {@code long} to the argument, with ties
1.656 - * rounding up.
1.657 - *
1.658 - * <p>Special cases:
1.659 - * <ul><li>If the argument is NaN, the result is 0.
1.660 - * <li>If the argument is negative infinity or any value less than or
1.661 - * equal to the value of {@code Long.MIN_VALUE}, the result is
1.662 - * equal to the value of {@code Long.MIN_VALUE}.
1.663 - * <li>If the argument is positive infinity or any value greater than or
1.664 - * equal to the value of {@code Long.MAX_VALUE}, the result is
1.665 - * equal to the value of {@code Long.MAX_VALUE}.</ul>
1.666 - *
1.667 - * @param a a floating-point value to be rounded to a
1.668 - * {@code long}.
1.669 - * @return the value of the argument rounded to the nearest
1.670 - * {@code long} value.
1.671 - * @see java.lang.Long#MAX_VALUE
1.672 - * @see java.lang.Long#MIN_VALUE
1.673 - */
1.674 - @JavaScriptBody(args="a", body="return Math.round(a);")
1.675 - public static long round(double a) {
1.676 - throw new UnsupportedOperationException();
1.677 - }
1.678 -
1.679 -// private static Random randomNumberGenerator;
1.680 -//
1.681 -// private static synchronized Random initRNG() {
1.682 -// Random rnd = randomNumberGenerator;
1.683 -// return (rnd == null) ? (randomNumberGenerator = new Random()) : rnd;
1.684 -// }
1.685 -
1.686 - /**
1.687 - * Returns a {@code double} value with a positive sign, greater
1.688 - * than or equal to {@code 0.0} and less than {@code 1.0}.
1.689 - * Returned values are chosen pseudorandomly with (approximately)
1.690 - * uniform distribution from that range.
1.691 - *
1.692 - * <p>When this method is first called, it creates a single new
1.693 - * pseudorandom-number generator, exactly as if by the expression
1.694 - *
1.695 - * <blockquote>{@code new java.util.Random()}</blockquote>
1.696 - *
1.697 - * This new pseudorandom-number generator is used thereafter for
1.698 - * all calls to this method and is used nowhere else.
1.699 - *
1.700 - * <p>This method is properly synchronized to allow correct use by
1.701 - * more than one thread. However, if many threads need to generate
1.702 - * pseudorandom numbers at a great rate, it may reduce contention
1.703 - * for each thread to have its own pseudorandom-number generator.
1.704 - *
1.705 - * @return a pseudorandom {@code double} greater than or equal
1.706 - * to {@code 0.0} and less than {@code 1.0}.
1.707 - * @see Random#nextDouble()
1.708 - */
1.709 - @JavaScriptBody(args={}, body="return Math.random();")
1.710 - public static double random() {
1.711 - throw new UnsupportedOperationException();
1.712 - }
1.713 -
1.714 - /**
1.715 - * Returns the absolute value of an {@code int} value.
1.716 - * If the argument is not negative, the argument is returned.
1.717 - * If the argument is negative, the negation of the argument is returned.
1.718 - *
1.719 - * <p>Note that if the argument is equal to the value of
1.720 - * {@link Integer#MIN_VALUE}, the most negative representable
1.721 - * {@code int} value, the result is that same value, which is
1.722 - * negative.
1.723 - *
1.724 - * @param a the argument whose absolute value is to be determined
1.725 - * @return the absolute value of the argument.
1.726 - */
1.727 - public static int abs(int a) {
1.728 - return (a < 0) ? -a : a;
1.729 - }
1.730 -
1.731 - /**
1.732 - * Returns the absolute value of a {@code long} value.
1.733 - * If the argument is not negative, the argument is returned.
1.734 - * If the argument is negative, the negation of the argument is returned.
1.735 - *
1.736 - * <p>Note that if the argument is equal to the value of
1.737 - * {@link Long#MIN_VALUE}, the most negative representable
1.738 - * {@code long} value, the result is that same value, which
1.739 - * is negative.
1.740 - *
1.741 - * @param a the argument whose absolute value is to be determined
1.742 - * @return the absolute value of the argument.
1.743 - */
1.744 - public static long abs(long a) {
1.745 - return (a < 0) ? -a : a;
1.746 - }
1.747 -
1.748 - /**
1.749 - * Returns the absolute value of a {@code float} value.
1.750 - * If the argument is not negative, the argument is returned.
1.751 - * If the argument is negative, the negation of the argument is returned.
1.752 - * Special cases:
1.753 - * <ul><li>If the argument is positive zero or negative zero, the
1.754 - * result is positive zero.
1.755 - * <li>If the argument is infinite, the result is positive infinity.
1.756 - * <li>If the argument is NaN, the result is NaN.</ul>
1.757 - * In other words, the result is the same as the value of the expression:
1.758 - * <p>{@code Float.intBitsToFloat(0x7fffffff & Float.floatToIntBits(a))}
1.759 - *
1.760 - * @param a the argument whose absolute value is to be determined
1.761 - * @return the absolute value of the argument.
1.762 - */
1.763 - public static float abs(float a) {
1.764 - return (a <= 0.0F) ? 0.0F - a : a;
1.765 - }
1.766 -
1.767 - /**
1.768 - * Returns the absolute value of a {@code double} value.
1.769 - * If the argument is not negative, the argument is returned.
1.770 - * If the argument is negative, the negation of the argument is returned.
1.771 - * Special cases:
1.772 - * <ul><li>If the argument is positive zero or negative zero, the result
1.773 - * is positive zero.
1.774 - * <li>If the argument is infinite, the result is positive infinity.
1.775 - * <li>If the argument is NaN, the result is NaN.</ul>
1.776 - * In other words, the result is the same as the value of the expression:
1.777 - * <p>{@code Double.longBitsToDouble((Double.doubleToLongBits(a)<<1)>>>1)}
1.778 - *
1.779 - * @param a the argument whose absolute value is to be determined
1.780 - * @return the absolute value of the argument.
1.781 - */
1.782 - public static double abs(double a) {
1.783 - return (a <= 0.0D) ? 0.0D - a : a;
1.784 - }
1.785 -
1.786 - /**
1.787 - * Returns the greater of two {@code int} values. That is, the
1.788 - * result is the argument closer to the value of
1.789 - * {@link Integer#MAX_VALUE}. If the arguments have the same value,
1.790 - * the result is that same value.
1.791 - *
1.792 - * @param a an argument.
1.793 - * @param b another argument.
1.794 - * @return the larger of {@code a} and {@code b}.
1.795 - */
1.796 - public static int max(int a, int b) {
1.797 - return (a >= b) ? a : b;
1.798 - }
1.799 -
1.800 - /**
1.801 - * Returns the greater of two {@code long} values. That is, the
1.802 - * result is the argument closer to the value of
1.803 - * {@link Long#MAX_VALUE}. If the arguments have the same value,
1.804 - * the result is that same value.
1.805 - *
1.806 - * @param a an argument.
1.807 - * @param b another argument.
1.808 - * @return the larger of {@code a} and {@code b}.
1.809 - */
1.810 - public static long max(long a, long b) {
1.811 - return (a >= b) ? a : b;
1.812 - }
1.813 -
1.814 - /**
1.815 - * Returns the greater of two {@code float} values. That is,
1.816 - * the result is the argument closer to positive infinity. If the
1.817 - * arguments have the same value, the result is that same
1.818 - * value. If either value is NaN, then the result is NaN. Unlike
1.819 - * the numerical comparison operators, this method considers
1.820 - * negative zero to be strictly smaller than positive zero. If one
1.821 - * argument is positive zero and the other negative zero, the
1.822 - * result is positive zero.
1.823 - *
1.824 - * @param a an argument.
1.825 - * @param b another argument.
1.826 - * @return the larger of {@code a} and {@code b}.
1.827 - */
1.828 - @JavaScriptBody(args={"a", "b"},
1.829 - body="return Math.max(a,b);"
1.830 - )
1.831 - public static float max(float a, float b) {
1.832 - throw new UnsupportedOperationException();
1.833 - }
1.834 -
1.835 - /**
1.836 - * Returns the greater of two {@code double} values. That
1.837 - * is, the result is the argument closer to positive infinity. If
1.838 - * the arguments have the same value, the result is that same
1.839 - * value. If either value is NaN, then the result is NaN. Unlike
1.840 - * the numerical comparison operators, this method considers
1.841 - * negative zero to be strictly smaller than positive zero. If one
1.842 - * argument is positive zero and the other negative zero, the
1.843 - * result is positive zero.
1.844 - *
1.845 - * @param a an argument.
1.846 - * @param b another argument.
1.847 - * @return the larger of {@code a} and {@code b}.
1.848 - */
1.849 - @JavaScriptBody(args={"a", "b"},
1.850 - body="return Math.max(a,b);"
1.851 - )
1.852 - public static double max(double a, double b) {
1.853 - throw new UnsupportedOperationException();
1.854 - }
1.855 -
1.856 - /**
1.857 - * Returns the smaller of two {@code int} values. That is,
1.858 - * the result the argument closer to the value of
1.859 - * {@link Integer#MIN_VALUE}. If the arguments have the same
1.860 - * value, the result is that same value.
1.861 - *
1.862 - * @param a an argument.
1.863 - * @param b another argument.
1.864 - * @return the smaller of {@code a} and {@code b}.
1.865 - */
1.866 - public static int min(int a, int b) {
1.867 - return (a <= b) ? a : b;
1.868 - }
1.869 -
1.870 - /**
1.871 - * Returns the smaller of two {@code long} values. That is,
1.872 - * the result is the argument closer to the value of
1.873 - * {@link Long#MIN_VALUE}. If the arguments have the same
1.874 - * value, the result is that same value.
1.875 - *
1.876 - * @param a an argument.
1.877 - * @param b another argument.
1.878 - * @return the smaller of {@code a} and {@code b}.
1.879 - */
1.880 - public static long min(long a, long b) {
1.881 - return (a <= b) ? a : b;
1.882 - }
1.883 -
1.884 - /**
1.885 - * Returns the smaller of two {@code float} values. That is,
1.886 - * the result is the value closer to negative infinity. If the
1.887 - * arguments have the same value, the result is that same
1.888 - * value. If either value is NaN, then the result is NaN. Unlike
1.889 - * the numerical comparison operators, this method considers
1.890 - * negative zero to be strictly smaller than positive zero. If
1.891 - * one argument is positive zero and the other is negative zero,
1.892 - * the result is negative zero.
1.893 - *
1.894 - * @param a an argument.
1.895 - * @param b another argument.
1.896 - * @return the smaller of {@code a} and {@code b}.
1.897 - */
1.898 - @JavaScriptBody(args={"a", "b"},
1.899 - body="return Math.min(a,b);"
1.900 - )
1.901 - public static float min(float a, float b) {
1.902 - throw new UnsupportedOperationException();
1.903 - }
1.904 -
1.905 - /**
1.906 - * Returns the smaller of two {@code double} values. That
1.907 - * is, the result is the value closer to negative infinity. If the
1.908 - * arguments have the same value, the result is that same
1.909 - * value. If either value is NaN, then the result is NaN. Unlike
1.910 - * the numerical comparison operators, this method considers
1.911 - * negative zero to be strictly smaller than positive zero. If one
1.912 - * argument is positive zero and the other is negative zero, the
1.913 - * result is negative zero.
1.914 - *
1.915 - * @param a an argument.
1.916 - * @param b another argument.
1.917 - * @return the smaller of {@code a} and {@code b}.
1.918 - */
1.919 - @JavaScriptBody(args={"a", "b"},
1.920 - body="return Math.min(a,b);"
1.921 - )
1.922 - public static double min(double a, double b) {
1.923 - throw new UnsupportedOperationException();
1.924 - }
1.925 -
1.926 - /**
1.927 - * Returns the size of an ulp of the argument. An ulp of a
1.928 - * {@code double} value is the positive distance between this
1.929 - * floating-point value and the {@code double} value next
1.930 - * larger in magnitude. Note that for non-NaN <i>x</i>,
1.931 - * <code>ulp(-<i>x</i>) == ulp(<i>x</i>)</code>.
1.932 - *
1.933 - * <p>Special Cases:
1.934 - * <ul>
1.935 - * <li> If the argument is NaN, then the result is NaN.
1.936 - * <li> If the argument is positive or negative infinity, then the
1.937 - * result is positive infinity.
1.938 - * <li> If the argument is positive or negative zero, then the result is
1.939 - * {@code Double.MIN_VALUE}.
1.940 - * <li> If the argument is ±{@code Double.MAX_VALUE}, then
1.941 - * the result is equal to 2<sup>971</sup>.
1.942 - * </ul>
1.943 - *
1.944 - * @param d the floating-point value whose ulp is to be returned
1.945 - * @return the size of an ulp of the argument
1.946 - * @author Joseph D. Darcy
1.947 - * @since 1.5
1.948 - */
1.949 -// public static double ulp(double d) {
1.950 -// return sun.misc.FpUtils.ulp(d);
1.951 -// }
1.952 -
1.953 - /**
1.954 - * Returns the size of an ulp of the argument. An ulp of a
1.955 - * {@code float} value is the positive distance between this
1.956 - * floating-point value and the {@code float} value next
1.957 - * larger in magnitude. Note that for non-NaN <i>x</i>,
1.958 - * <code>ulp(-<i>x</i>) == ulp(<i>x</i>)</code>.
1.959 - *
1.960 - * <p>Special Cases:
1.961 - * <ul>
1.962 - * <li> If the argument is NaN, then the result is NaN.
1.963 - * <li> If the argument is positive or negative infinity, then the
1.964 - * result is positive infinity.
1.965 - * <li> If the argument is positive or negative zero, then the result is
1.966 - * {@code Float.MIN_VALUE}.
1.967 - * <li> If the argument is ±{@code Float.MAX_VALUE}, then
1.968 - * the result is equal to 2<sup>104</sup>.
1.969 - * </ul>
1.970 - *
1.971 - * @param f the floating-point value whose ulp is to be returned
1.972 - * @return the size of an ulp of the argument
1.973 - * @author Joseph D. Darcy
1.974 - * @since 1.5
1.975 - */
1.976 -// public static float ulp(float f) {
1.977 -// return sun.misc.FpUtils.ulp(f);
1.978 -// }
1.979 -
1.980 - /**
1.981 - * Returns the signum function of the argument; zero if the argument
1.982 - * is zero, 1.0 if the argument is greater than zero, -1.0 if the
1.983 - * argument is less than zero.
1.984 - *
1.985 - * <p>Special Cases:
1.986 - * <ul>
1.987 - * <li> If the argument is NaN, then the result is NaN.
1.988 - * <li> If the argument is positive zero or negative zero, then the
1.989 - * result is the same as the argument.
1.990 - * </ul>
1.991 - *
1.992 - * @param d the floating-point value whose signum is to be returned
1.993 - * @return the signum function of the argument
1.994 - * @author Joseph D. Darcy
1.995 - * @since 1.5
1.996 - */
1.997 - public static double signum(double d) {
1.998 - if (d < 0.0) { return -1.0; }
1.999 - if (d > 0.0) { return 1.0; }
1.1000 - return d;
1.1001 - }
1.1002 -
1.1003 - /**
1.1004 - * Returns the signum function of the argument; zero if the argument
1.1005 - * is zero, 1.0f if the argument is greater than zero, -1.0f if the
1.1006 - * argument is less than zero.
1.1007 - *
1.1008 - * <p>Special Cases:
1.1009 - * <ul>
1.1010 - * <li> If the argument is NaN, then the result is NaN.
1.1011 - * <li> If the argument is positive zero or negative zero, then the
1.1012 - * result is the same as the argument.
1.1013 - * </ul>
1.1014 - *
1.1015 - * @param f the floating-point value whose signum is to be returned
1.1016 - * @return the signum function of the argument
1.1017 - * @author Joseph D. Darcy
1.1018 - * @since 1.5
1.1019 - */
1.1020 - public static float signum(float f) {
1.1021 - if (f < 0.0f) { return -1.0f; }
1.1022 - if (f > 0.0f) { return 1.0f; }
1.1023 - return f;
1.1024 - }
1.1025 -
1.1026 - /**
1.1027 - * Returns the first floating-point argument with the sign of the
1.1028 - * second floating-point argument. Note that unlike the {@link
1.1029 - * StrictMath#copySign(double, double) StrictMath.copySign}
1.1030 - * method, this method does not require NaN {@code sign}
1.1031 - * arguments to be treated as positive values; implementations are
1.1032 - * permitted to treat some NaN arguments as positive and other NaN
1.1033 - * arguments as negative to allow greater performance.
1.1034 - *
1.1035 - * @param magnitude the parameter providing the magnitude of the result
1.1036 - * @param sign the parameter providing the sign of the result
1.1037 - * @return a value with the magnitude of {@code magnitude}
1.1038 - * and the sign of {@code sign}.
1.1039 - * @since 1.6
1.1040 - */
1.1041 -// public static double copySign(double magnitude, double sign) {
1.1042 -// return sun.misc.FpUtils.rawCopySign(magnitude, sign);
1.1043 -// }
1.1044 -
1.1045 - /**
1.1046 - * Returns the first floating-point argument with the sign of the
1.1047 - * second floating-point argument. Note that unlike the {@link
1.1048 - * StrictMath#copySign(float, float) StrictMath.copySign}
1.1049 - * method, this method does not require NaN {@code sign}
1.1050 - * arguments to be treated as positive values; implementations are
1.1051 - * permitted to treat some NaN arguments as positive and other NaN
1.1052 - * arguments as negative to allow greater performance.
1.1053 - *
1.1054 - * @param magnitude the parameter providing the magnitude of the result
1.1055 - * @param sign the parameter providing the sign of the result
1.1056 - * @return a value with the magnitude of {@code magnitude}
1.1057 - * and the sign of {@code sign}.
1.1058 - * @since 1.6
1.1059 - */
1.1060 -// public static float copySign(float magnitude, float sign) {
1.1061 -// return sun.misc.FpUtils.rawCopySign(magnitude, sign);
1.1062 -// }
1.1063 -
1.1064 - /**
1.1065 - * Returns the unbiased exponent used in the representation of a
1.1066 - * {@code float}. Special cases:
1.1067 - *
1.1068 - * <ul>
1.1069 - * <li>If the argument is NaN or infinite, then the result is
1.1070 - * {@link Float#MAX_EXPONENT} + 1.
1.1071 - * <li>If the argument is zero or subnormal, then the result is
1.1072 - * {@link Float#MIN_EXPONENT} -1.
1.1073 - * </ul>
1.1074 - * @param f a {@code float} value
1.1075 - * @return the unbiased exponent of the argument
1.1076 - * @since 1.6
1.1077 - */
1.1078 -// public static int getExponent(float f) {
1.1079 -// return sun.misc.FpUtils.getExponent(f);
1.1080 -// }
1.1081 -
1.1082 - /**
1.1083 - * Returns the unbiased exponent used in the representation of a
1.1084 - * {@code double}. Special cases:
1.1085 - *
1.1086 - * <ul>
1.1087 - * <li>If the argument is NaN or infinite, then the result is
1.1088 - * {@link Double#MAX_EXPONENT} + 1.
1.1089 - * <li>If the argument is zero or subnormal, then the result is
1.1090 - * {@link Double#MIN_EXPONENT} -1.
1.1091 - * </ul>
1.1092 - * @param d a {@code double} value
1.1093 - * @return the unbiased exponent of the argument
1.1094 - * @since 1.6
1.1095 - */
1.1096 -// public static int getExponent(double d) {
1.1097 -// return sun.misc.FpUtils.getExponent(d);
1.1098 -// }
1.1099 -
1.1100 - /**
1.1101 - * Returns the floating-point number adjacent to the first
1.1102 - * argument in the direction of the second argument. If both
1.1103 - * arguments compare as equal the second argument is returned.
1.1104 - *
1.1105 - * <p>
1.1106 - * Special cases:
1.1107 - * <ul>
1.1108 - * <li> If either argument is a NaN, then NaN is returned.
1.1109 - *
1.1110 - * <li> If both arguments are signed zeros, {@code direction}
1.1111 - * is returned unchanged (as implied by the requirement of
1.1112 - * returning the second argument if the arguments compare as
1.1113 - * equal).
1.1114 - *
1.1115 - * <li> If {@code start} is
1.1116 - * ±{@link Double#MIN_VALUE} and {@code direction}
1.1117 - * has a value such that the result should have a smaller
1.1118 - * magnitude, then a zero with the same sign as {@code start}
1.1119 - * is returned.
1.1120 - *
1.1121 - * <li> If {@code start} is infinite and
1.1122 - * {@code direction} has a value such that the result should
1.1123 - * have a smaller magnitude, {@link Double#MAX_VALUE} with the
1.1124 - * same sign as {@code start} is returned.
1.1125 - *
1.1126 - * <li> If {@code start} is equal to ±
1.1127 - * {@link Double#MAX_VALUE} and {@code direction} has a
1.1128 - * value such that the result should have a larger magnitude, an
1.1129 - * infinity with same sign as {@code start} is returned.
1.1130 - * </ul>
1.1131 - *
1.1132 - * @param start starting floating-point value
1.1133 - * @param direction value indicating which of
1.1134 - * {@code start}'s neighbors or {@code start} should
1.1135 - * be returned
1.1136 - * @return The floating-point number adjacent to {@code start} in the
1.1137 - * direction of {@code direction}.
1.1138 - * @since 1.6
1.1139 - */
1.1140 -// public static double nextAfter(double start, double direction) {
1.1141 -// return sun.misc.FpUtils.nextAfter(start, direction);
1.1142 -// }
1.1143 -
1.1144 - /**
1.1145 - * Returns the floating-point number adjacent to the first
1.1146 - * argument in the direction of the second argument. If both
1.1147 - * arguments compare as equal a value equivalent to the second argument
1.1148 - * is returned.
1.1149 - *
1.1150 - * <p>
1.1151 - * Special cases:
1.1152 - * <ul>
1.1153 - * <li> If either argument is a NaN, then NaN is returned.
1.1154 - *
1.1155 - * <li> If both arguments are signed zeros, a value equivalent
1.1156 - * to {@code direction} is returned.
1.1157 - *
1.1158 - * <li> If {@code start} is
1.1159 - * ±{@link Float#MIN_VALUE} and {@code direction}
1.1160 - * has a value such that the result should have a smaller
1.1161 - * magnitude, then a zero with the same sign as {@code start}
1.1162 - * is returned.
1.1163 - *
1.1164 - * <li> If {@code start} is infinite and
1.1165 - * {@code direction} has a value such that the result should
1.1166 - * have a smaller magnitude, {@link Float#MAX_VALUE} with the
1.1167 - * same sign as {@code start} is returned.
1.1168 - *
1.1169 - * <li> If {@code start} is equal to ±
1.1170 - * {@link Float#MAX_VALUE} and {@code direction} has a
1.1171 - * value such that the result should have a larger magnitude, an
1.1172 - * infinity with same sign as {@code start} is returned.
1.1173 - * </ul>
1.1174 - *
1.1175 - * @param start starting floating-point value
1.1176 - * @param direction value indicating which of
1.1177 - * {@code start}'s neighbors or {@code start} should
1.1178 - * be returned
1.1179 - * @return The floating-point number adjacent to {@code start} in the
1.1180 - * direction of {@code direction}.
1.1181 - * @since 1.6
1.1182 - */
1.1183 -// public static float nextAfter(float start, double direction) {
1.1184 -// return sun.misc.FpUtils.nextAfter(start, direction);
1.1185 -// }
1.1186 -
1.1187 - /**
1.1188 - * Returns the floating-point value adjacent to {@code d} in
1.1189 - * the direction of positive infinity. This method is
1.1190 - * semantically equivalent to {@code nextAfter(d,
1.1191 - * Double.POSITIVE_INFINITY)}; however, a {@code nextUp}
1.1192 - * implementation may run faster than its equivalent
1.1193 - * {@code nextAfter} call.
1.1194 - *
1.1195 - * <p>Special Cases:
1.1196 - * <ul>
1.1197 - * <li> If the argument is NaN, the result is NaN.
1.1198 - *
1.1199 - * <li> If the argument is positive infinity, the result is
1.1200 - * positive infinity.
1.1201 - *
1.1202 - * <li> If the argument is zero, the result is
1.1203 - * {@link Double#MIN_VALUE}
1.1204 - *
1.1205 - * </ul>
1.1206 - *
1.1207 - * @param d starting floating-point value
1.1208 - * @return The adjacent floating-point value closer to positive
1.1209 - * infinity.
1.1210 - * @since 1.6
1.1211 - */
1.1212 -// public static double nextUp(double d) {
1.1213 -// return sun.misc.FpUtils.nextUp(d);
1.1214 -// }
1.1215 -
1.1216 - /**
1.1217 - * Returns the floating-point value adjacent to {@code f} in
1.1218 - * the direction of positive infinity. This method is
1.1219 - * semantically equivalent to {@code nextAfter(f,
1.1220 - * Float.POSITIVE_INFINITY)}; however, a {@code nextUp}
1.1221 - * implementation may run faster than its equivalent
1.1222 - * {@code nextAfter} call.
1.1223 - *
1.1224 - * <p>Special Cases:
1.1225 - * <ul>
1.1226 - * <li> If the argument is NaN, the result is NaN.
1.1227 - *
1.1228 - * <li> If the argument is positive infinity, the result is
1.1229 - * positive infinity.
1.1230 - *
1.1231 - * <li> If the argument is zero, the result is
1.1232 - * {@link Float#MIN_VALUE}
1.1233 - *
1.1234 - * </ul>
1.1235 - *
1.1236 - * @param f starting floating-point value
1.1237 - * @return The adjacent floating-point value closer to positive
1.1238 - * infinity.
1.1239 - * @since 1.6
1.1240 - */
1.1241 -// public static float nextUp(float f) {
1.1242 -// return sun.misc.FpUtils.nextUp(f);
1.1243 -// }
1.1244 -
1.1245 -
1.1246 - /**
1.1247 - * Return {@code d} ×
1.1248 - * 2<sup>{@code scaleFactor}</sup> rounded as if performed
1.1249 - * by a single correctly rounded floating-point multiply to a
1.1250 - * member of the double value set. See the Java
1.1251 - * Language Specification for a discussion of floating-point
1.1252 - * value sets. If the exponent of the result is between {@link
1.1253 - * Double#MIN_EXPONENT} and {@link Double#MAX_EXPONENT}, the
1.1254 - * answer is calculated exactly. If the exponent of the result
1.1255 - * would be larger than {@code Double.MAX_EXPONENT}, an
1.1256 - * infinity is returned. Note that if the result is subnormal,
1.1257 - * precision may be lost; that is, when {@code scalb(x, n)}
1.1258 - * is subnormal, {@code scalb(scalb(x, n), -n)} may not equal
1.1259 - * <i>x</i>. When the result is non-NaN, the result has the same
1.1260 - * sign as {@code d}.
1.1261 - *
1.1262 - * <p>Special cases:
1.1263 - * <ul>
1.1264 - * <li> If the first argument is NaN, NaN is returned.
1.1265 - * <li> If the first argument is infinite, then an infinity of the
1.1266 - * same sign is returned.
1.1267 - * <li> If the first argument is zero, then a zero of the same
1.1268 - * sign is returned.
1.1269 - * </ul>
1.1270 - *
1.1271 - * @param d number to be scaled by a power of two.
1.1272 - * @param scaleFactor power of 2 used to scale {@code d}
1.1273 - * @return {@code d} × 2<sup>{@code scaleFactor}</sup>
1.1274 - * @since 1.6
1.1275 - */
1.1276 -// public static double scalb(double d, int scaleFactor) {
1.1277 -// return sun.misc.FpUtils.scalb(d, scaleFactor);
1.1278 -// }
1.1279 -
1.1280 - /**
1.1281 - * Return {@code f} ×
1.1282 - * 2<sup>{@code scaleFactor}</sup> rounded as if performed
1.1283 - * by a single correctly rounded floating-point multiply to a
1.1284 - * member of the float value set. See the Java
1.1285 - * Language Specification for a discussion of floating-point
1.1286 - * value sets. If the exponent of the result is between {@link
1.1287 - * Float#MIN_EXPONENT} and {@link Float#MAX_EXPONENT}, the
1.1288 - * answer is calculated exactly. If the exponent of the result
1.1289 - * would be larger than {@code Float.MAX_EXPONENT}, an
1.1290 - * infinity is returned. Note that if the result is subnormal,
1.1291 - * precision may be lost; that is, when {@code scalb(x, n)}
1.1292 - * is subnormal, {@code scalb(scalb(x, n), -n)} may not equal
1.1293 - * <i>x</i>. When the result is non-NaN, the result has the same
1.1294 - * sign as {@code f}.
1.1295 - *
1.1296 - * <p>Special cases:
1.1297 - * <ul>
1.1298 - * <li> If the first argument is NaN, NaN is returned.
1.1299 - * <li> If the first argument is infinite, then an infinity of the
1.1300 - * same sign is returned.
1.1301 - * <li> If the first argument is zero, then a zero of the same
1.1302 - * sign is returned.
1.1303 - * </ul>
1.1304 - *
1.1305 - * @param f number to be scaled by a power of two.
1.1306 - * @param scaleFactor power of 2 used to scale {@code f}
1.1307 - * @return {@code f} × 2<sup>{@code scaleFactor}</sup>
1.1308 - * @since 1.6
1.1309 - */
1.1310 -// public static float scalb(float f, int scaleFactor) {
1.1311 -// return sun.misc.FpUtils.scalb(f, scaleFactor);
1.1312 -// }
1.1313 -}