1.1 --- a/emul/mini/src/main/java/java/lang/Double.java Mon Feb 25 19:00:08 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,994 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 1994, 2010, 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 - * The {@code Double} class wraps a value of the primitive type
1.35 - * {@code double} in an object. An object of type
1.36 - * {@code Double} contains a single field whose type is
1.37 - * {@code double}.
1.38 - *
1.39 - * <p>In addition, this class provides several methods for converting a
1.40 - * {@code double} to a {@code String} and a
1.41 - * {@code String} to a {@code double}, as well as other
1.42 - * constants and methods useful when dealing with a
1.43 - * {@code double}.
1.44 - *
1.45 - * @author Lee Boynton
1.46 - * @author Arthur van Hoff
1.47 - * @author Joseph D. Darcy
1.48 - * @since JDK1.0
1.49 - */
1.50 -public final class Double extends Number implements Comparable<Double> {
1.51 - /**
1.52 - * A constant holding the positive infinity of type
1.53 - * {@code double}. It is equal to the value returned by
1.54 - * {@code Double.longBitsToDouble(0x7ff0000000000000L)}.
1.55 - */
1.56 - public static final double POSITIVE_INFINITY = 1.0 / 0.0;
1.57 -
1.58 - /**
1.59 - * A constant holding the negative infinity of type
1.60 - * {@code double}. It is equal to the value returned by
1.61 - * {@code Double.longBitsToDouble(0xfff0000000000000L)}.
1.62 - */
1.63 - public static final double NEGATIVE_INFINITY = -1.0 / 0.0;
1.64 -
1.65 - /**
1.66 - * A constant holding a Not-a-Number (NaN) value of type
1.67 - * {@code double}. It is equivalent to the value returned by
1.68 - * {@code Double.longBitsToDouble(0x7ff8000000000000L)}.
1.69 - */
1.70 - public static final double NaN = 0.0d / 0.0;
1.71 -
1.72 - /**
1.73 - * A constant holding the largest positive finite value of type
1.74 - * {@code double},
1.75 - * (2-2<sup>-52</sup>)·2<sup>1023</sup>. It is equal to
1.76 - * the hexadecimal floating-point literal
1.77 - * {@code 0x1.fffffffffffffP+1023} and also equal to
1.78 - * {@code Double.longBitsToDouble(0x7fefffffffffffffL)}.
1.79 - */
1.80 - public static final double MAX_VALUE = 0x1.fffffffffffffP+1023; // 1.7976931348623157e+308
1.81 -
1.82 - /**
1.83 - * A constant holding the smallest positive normal value of type
1.84 - * {@code double}, 2<sup>-1022</sup>. It is equal to the
1.85 - * hexadecimal floating-point literal {@code 0x1.0p-1022} and also
1.86 - * equal to {@code Double.longBitsToDouble(0x0010000000000000L)}.
1.87 - *
1.88 - * @since 1.6
1.89 - */
1.90 - public static final double MIN_NORMAL = 0x1.0p-1022; // 2.2250738585072014E-308
1.91 -
1.92 - /**
1.93 - * A constant holding the smallest positive nonzero value of type
1.94 - * {@code double}, 2<sup>-1074</sup>. It is equal to the
1.95 - * hexadecimal floating-point literal
1.96 - * {@code 0x0.0000000000001P-1022} and also equal to
1.97 - * {@code Double.longBitsToDouble(0x1L)}.
1.98 - */
1.99 - public static final double MIN_VALUE = 0x0.0000000000001P-1022; // 4.9e-324
1.100 -
1.101 - /**
1.102 - * Maximum exponent a finite {@code double} variable may have.
1.103 - * It is equal to the value returned by
1.104 - * {@code Math.getExponent(Double.MAX_VALUE)}.
1.105 - *
1.106 - * @since 1.6
1.107 - */
1.108 - public static final int MAX_EXPONENT = 1023;
1.109 -
1.110 - /**
1.111 - * Minimum exponent a normalized {@code double} variable may
1.112 - * have. It is equal to the value returned by
1.113 - * {@code Math.getExponent(Double.MIN_NORMAL)}.
1.114 - *
1.115 - * @since 1.6
1.116 - */
1.117 - public static final int MIN_EXPONENT = -1022;
1.118 -
1.119 - /**
1.120 - * The number of bits used to represent a {@code double} value.
1.121 - *
1.122 - * @since 1.5
1.123 - */
1.124 - public static final int SIZE = 64;
1.125 -
1.126 - /**
1.127 - * The {@code Class} instance representing the primitive type
1.128 - * {@code double}.
1.129 - *
1.130 - * @since JDK1.1
1.131 - */
1.132 - public static final Class<Double> TYPE = (Class<Double>) Class.getPrimitiveClass("double");
1.133 -
1.134 - /**
1.135 - * Returns a string representation of the {@code double}
1.136 - * argument. All characters mentioned below are ASCII characters.
1.137 - * <ul>
1.138 - * <li>If the argument is NaN, the result is the string
1.139 - * "{@code NaN}".
1.140 - * <li>Otherwise, the result is a string that represents the sign and
1.141 - * magnitude (absolute value) of the argument. If the sign is negative,
1.142 - * the first character of the result is '{@code -}'
1.143 - * (<code>'\u002D'</code>); if the sign is positive, no sign character
1.144 - * appears in the result. As for the magnitude <i>m</i>:
1.145 - * <ul>
1.146 - * <li>If <i>m</i> is infinity, it is represented by the characters
1.147 - * {@code "Infinity"}; thus, positive infinity produces the result
1.148 - * {@code "Infinity"} and negative infinity produces the result
1.149 - * {@code "-Infinity"}.
1.150 - *
1.151 - * <li>If <i>m</i> is zero, it is represented by the characters
1.152 - * {@code "0.0"}; thus, negative zero produces the result
1.153 - * {@code "-0.0"} and positive zero produces the result
1.154 - * {@code "0.0"}.
1.155 - *
1.156 - * <li>If <i>m</i> is greater than or equal to 10<sup>-3</sup> but less
1.157 - * than 10<sup>7</sup>, then it is represented as the integer part of
1.158 - * <i>m</i>, in decimal form with no leading zeroes, followed by
1.159 - * '{@code .}' (<code>'\u002E'</code>), followed by one or
1.160 - * more decimal digits representing the fractional part of <i>m</i>.
1.161 - *
1.162 - * <li>If <i>m</i> is less than 10<sup>-3</sup> or greater than or
1.163 - * equal to 10<sup>7</sup>, then it is represented in so-called
1.164 - * "computerized scientific notation." Let <i>n</i> be the unique
1.165 - * integer such that 10<sup><i>n</i></sup> ≤ <i>m</i> {@literal <}
1.166 - * 10<sup><i>n</i>+1</sup>; then let <i>a</i> be the
1.167 - * mathematically exact quotient of <i>m</i> and
1.168 - * 10<sup><i>n</i></sup> so that 1 ≤ <i>a</i> {@literal <} 10. The
1.169 - * magnitude is then represented as the integer part of <i>a</i>,
1.170 - * as a single decimal digit, followed by '{@code .}'
1.171 - * (<code>'\u002E'</code>), followed by decimal digits
1.172 - * representing the fractional part of <i>a</i>, followed by the
1.173 - * letter '{@code E}' (<code>'\u0045'</code>), followed
1.174 - * by a representation of <i>n</i> as a decimal integer, as
1.175 - * produced by the method {@link Integer#toString(int)}.
1.176 - * </ul>
1.177 - * </ul>
1.178 - * How many digits must be printed for the fractional part of
1.179 - * <i>m</i> or <i>a</i>? There must be at least one digit to represent
1.180 - * the fractional part, and beyond that as many, but only as many, more
1.181 - * digits as are needed to uniquely distinguish the argument value from
1.182 - * adjacent values of type {@code double}. That is, suppose that
1.183 - * <i>x</i> is the exact mathematical value represented by the decimal
1.184 - * representation produced by this method for a finite nonzero argument
1.185 - * <i>d</i>. Then <i>d</i> must be the {@code double} value nearest
1.186 - * to <i>x</i>; or if two {@code double} values are equally close
1.187 - * to <i>x</i>, then <i>d</i> must be one of them and the least
1.188 - * significant bit of the significand of <i>d</i> must be {@code 0}.
1.189 - *
1.190 - * <p>To create localized string representations of a floating-point
1.191 - * value, use subclasses of {@link java.text.NumberFormat}.
1.192 - *
1.193 - * @param d the {@code double} to be converted.
1.194 - * @return a string representation of the argument.
1.195 - */
1.196 - @JavaScriptBody(args="d", body="var r = d.toString();"
1.197 - + "if (isFinite(d) && (r.indexOf('.') === -1)) r = r + '.0';"
1.198 - + "return r;")
1.199 - public static String toString(double d) {
1.200 - throw new UnsupportedOperationException();
1.201 - }
1.202 -
1.203 - /**
1.204 - * Returns a hexadecimal string representation of the
1.205 - * {@code double} argument. All characters mentioned below
1.206 - * are ASCII characters.
1.207 - *
1.208 - * <ul>
1.209 - * <li>If the argument is NaN, the result is the string
1.210 - * "{@code NaN}".
1.211 - * <li>Otherwise, the result is a string that represents the sign
1.212 - * and magnitude of the argument. If the sign is negative, the
1.213 - * first character of the result is '{@code -}'
1.214 - * (<code>'\u002D'</code>); if the sign is positive, no sign
1.215 - * character appears in the result. As for the magnitude <i>m</i>:
1.216 - *
1.217 - * <ul>
1.218 - * <li>If <i>m</i> is infinity, it is represented by the string
1.219 - * {@code "Infinity"}; thus, positive infinity produces the
1.220 - * result {@code "Infinity"} and negative infinity produces
1.221 - * the result {@code "-Infinity"}.
1.222 - *
1.223 - * <li>If <i>m</i> is zero, it is represented by the string
1.224 - * {@code "0x0.0p0"}; thus, negative zero produces the result
1.225 - * {@code "-0x0.0p0"} and positive zero produces the result
1.226 - * {@code "0x0.0p0"}.
1.227 - *
1.228 - * <li>If <i>m</i> is a {@code double} value with a
1.229 - * normalized representation, substrings are used to represent the
1.230 - * significand and exponent fields. The significand is
1.231 - * represented by the characters {@code "0x1."}
1.232 - * followed by a lowercase hexadecimal representation of the rest
1.233 - * of the significand as a fraction. Trailing zeros in the
1.234 - * hexadecimal representation are removed unless all the digits
1.235 - * are zero, in which case a single zero is used. Next, the
1.236 - * exponent is represented by {@code "p"} followed
1.237 - * by a decimal string of the unbiased exponent as if produced by
1.238 - * a call to {@link Integer#toString(int) Integer.toString} on the
1.239 - * exponent value.
1.240 - *
1.241 - * <li>If <i>m</i> is a {@code double} value with a subnormal
1.242 - * representation, the significand is represented by the
1.243 - * characters {@code "0x0."} followed by a
1.244 - * hexadecimal representation of the rest of the significand as a
1.245 - * fraction. Trailing zeros in the hexadecimal representation are
1.246 - * removed. Next, the exponent is represented by
1.247 - * {@code "p-1022"}. Note that there must be at
1.248 - * least one nonzero digit in a subnormal significand.
1.249 - *
1.250 - * </ul>
1.251 - *
1.252 - * </ul>
1.253 - *
1.254 - * <table border>
1.255 - * <caption><h3>Examples</h3></caption>
1.256 - * <tr><th>Floating-point Value</th><th>Hexadecimal String</th>
1.257 - * <tr><td>{@code 1.0}</td> <td>{@code 0x1.0p0}</td>
1.258 - * <tr><td>{@code -1.0}</td> <td>{@code -0x1.0p0}</td>
1.259 - * <tr><td>{@code 2.0}</td> <td>{@code 0x1.0p1}</td>
1.260 - * <tr><td>{@code 3.0}</td> <td>{@code 0x1.8p1}</td>
1.261 - * <tr><td>{@code 0.5}</td> <td>{@code 0x1.0p-1}</td>
1.262 - * <tr><td>{@code 0.25}</td> <td>{@code 0x1.0p-2}</td>
1.263 - * <tr><td>{@code Double.MAX_VALUE}</td>
1.264 - * <td>{@code 0x1.fffffffffffffp1023}</td>
1.265 - * <tr><td>{@code Minimum Normal Value}</td>
1.266 - * <td>{@code 0x1.0p-1022}</td>
1.267 - * <tr><td>{@code Maximum Subnormal Value}</td>
1.268 - * <td>{@code 0x0.fffffffffffffp-1022}</td>
1.269 - * <tr><td>{@code Double.MIN_VALUE}</td>
1.270 - * <td>{@code 0x0.0000000000001p-1022}</td>
1.271 - * </table>
1.272 - * @param d the {@code double} to be converted.
1.273 - * @return a hex string representation of the argument.
1.274 - * @since 1.5
1.275 - * @author Joseph D. Darcy
1.276 - */
1.277 - public static String toHexString(double d) {
1.278 - throw new UnsupportedOperationException();
1.279 -// /*
1.280 -// * Modeled after the "a" conversion specifier in C99, section
1.281 -// * 7.19.6.1; however, the output of this method is more
1.282 -// * tightly specified.
1.283 -// */
1.284 -// if (!FpUtils.isFinite(d) )
1.285 -// // For infinity and NaN, use the decimal output.
1.286 -// return Double.toString(d);
1.287 -// else {
1.288 -// // Initialized to maximum size of output.
1.289 -// StringBuffer answer = new StringBuffer(24);
1.290 -//
1.291 -// if (FpUtils.rawCopySign(1.0, d) == -1.0) // value is negative,
1.292 -// answer.append("-"); // so append sign info
1.293 -//
1.294 -// answer.append("0x");
1.295 -//
1.296 -// d = Math.abs(d);
1.297 -//
1.298 -// if(d == 0.0) {
1.299 -// answer.append("0.0p0");
1.300 -// }
1.301 -// else {
1.302 -// boolean subnormal = (d < DoubleConsts.MIN_NORMAL);
1.303 -//
1.304 -// // Isolate significand bits and OR in a high-order bit
1.305 -// // so that the string representation has a known
1.306 -// // length.
1.307 -// long signifBits = (Double.doubleToLongBits(d)
1.308 -// & DoubleConsts.SIGNIF_BIT_MASK) |
1.309 -// 0x1000000000000000L;
1.310 -//
1.311 -// // Subnormal values have a 0 implicit bit; normal
1.312 -// // values have a 1 implicit bit.
1.313 -// answer.append(subnormal ? "0." : "1.");
1.314 -//
1.315 -// // Isolate the low-order 13 digits of the hex
1.316 -// // representation. If all the digits are zero,
1.317 -// // replace with a single 0; otherwise, remove all
1.318 -// // trailing zeros.
1.319 -// String signif = Long.toHexString(signifBits).substring(3,16);
1.320 -// answer.append(signif.equals("0000000000000") ? // 13 zeros
1.321 -// "0":
1.322 -// signif.replaceFirst("0{1,12}$", ""));
1.323 -//
1.324 -// // If the value is subnormal, use the E_min exponent
1.325 -// // value for double; otherwise, extract and report d's
1.326 -// // exponent (the representation of a subnormal uses
1.327 -// // E_min -1).
1.328 -// answer.append("p" + (subnormal ?
1.329 -// DoubleConsts.MIN_EXPONENT:
1.330 -// FpUtils.getExponent(d) ));
1.331 -// }
1.332 -// return answer.toString();
1.333 -// }
1.334 - }
1.335 -
1.336 - /**
1.337 - * Returns a {@code Double} object holding the
1.338 - * {@code double} value represented by the argument string
1.339 - * {@code s}.
1.340 - *
1.341 - * <p>If {@code s} is {@code null}, then a
1.342 - * {@code NullPointerException} is thrown.
1.343 - *
1.344 - * <p>Leading and trailing whitespace characters in {@code s}
1.345 - * are ignored. Whitespace is removed as if by the {@link
1.346 - * String#trim} method; that is, both ASCII space and control
1.347 - * characters are removed. The rest of {@code s} should
1.348 - * constitute a <i>FloatValue</i> as described by the lexical
1.349 - * syntax rules:
1.350 - *
1.351 - * <blockquote>
1.352 - * <dl>
1.353 - * <dt><i>FloatValue:</i>
1.354 - * <dd><i>Sign<sub>opt</sub></i> {@code NaN}
1.355 - * <dd><i>Sign<sub>opt</sub></i> {@code Infinity}
1.356 - * <dd><i>Sign<sub>opt</sub> FloatingPointLiteral</i>
1.357 - * <dd><i>Sign<sub>opt</sub> HexFloatingPointLiteral</i>
1.358 - * <dd><i>SignedInteger</i>
1.359 - * </dl>
1.360 - *
1.361 - * <p>
1.362 - *
1.363 - * <dl>
1.364 - * <dt><i>HexFloatingPointLiteral</i>:
1.365 - * <dd> <i>HexSignificand BinaryExponent FloatTypeSuffix<sub>opt</sub></i>
1.366 - * </dl>
1.367 - *
1.368 - * <p>
1.369 - *
1.370 - * <dl>
1.371 - * <dt><i>HexSignificand:</i>
1.372 - * <dd><i>HexNumeral</i>
1.373 - * <dd><i>HexNumeral</i> {@code .}
1.374 - * <dd>{@code 0x} <i>HexDigits<sub>opt</sub>
1.375 - * </i>{@code .}<i> HexDigits</i>
1.376 - * <dd>{@code 0X}<i> HexDigits<sub>opt</sub>
1.377 - * </i>{@code .} <i>HexDigits</i>
1.378 - * </dl>
1.379 - *
1.380 - * <p>
1.381 - *
1.382 - * <dl>
1.383 - * <dt><i>BinaryExponent:</i>
1.384 - * <dd><i>BinaryExponentIndicator SignedInteger</i>
1.385 - * </dl>
1.386 - *
1.387 - * <p>
1.388 - *
1.389 - * <dl>
1.390 - * <dt><i>BinaryExponentIndicator:</i>
1.391 - * <dd>{@code p}
1.392 - * <dd>{@code P}
1.393 - * </dl>
1.394 - *
1.395 - * </blockquote>
1.396 - *
1.397 - * where <i>Sign</i>, <i>FloatingPointLiteral</i>,
1.398 - * <i>HexNumeral</i>, <i>HexDigits</i>, <i>SignedInteger</i> and
1.399 - * <i>FloatTypeSuffix</i> are as defined in the lexical structure
1.400 - * sections of
1.401 - * <cite>The Java™ Language Specification</cite>,
1.402 - * except that underscores are not accepted between digits.
1.403 - * If {@code s} does not have the form of
1.404 - * a <i>FloatValue</i>, then a {@code NumberFormatException}
1.405 - * is thrown. Otherwise, {@code s} is regarded as
1.406 - * representing an exact decimal value in the usual
1.407 - * "computerized scientific notation" or as an exact
1.408 - * hexadecimal value; this exact numerical value is then
1.409 - * conceptually converted to an "infinitely precise"
1.410 - * binary value that is then rounded to type {@code double}
1.411 - * by the usual round-to-nearest rule of IEEE 754 floating-point
1.412 - * arithmetic, which includes preserving the sign of a zero
1.413 - * value.
1.414 - *
1.415 - * Note that the round-to-nearest rule also implies overflow and
1.416 - * underflow behaviour; if the exact value of {@code s} is large
1.417 - * enough in magnitude (greater than or equal to ({@link
1.418 - * #MAX_VALUE} + {@link Math#ulp(double) ulp(MAX_VALUE)}/2),
1.419 - * rounding to {@code double} will result in an infinity and if the
1.420 - * exact value of {@code s} is small enough in magnitude (less
1.421 - * than or equal to {@link #MIN_VALUE}/2), rounding to float will
1.422 - * result in a zero.
1.423 - *
1.424 - * Finally, after rounding a {@code Double} object representing
1.425 - * this {@code double} value is returned.
1.426 - *
1.427 - * <p> To interpret localized string representations of a
1.428 - * floating-point value, use subclasses of {@link
1.429 - * java.text.NumberFormat}.
1.430 - *
1.431 - * <p>Note that trailing format specifiers, specifiers that
1.432 - * determine the type of a floating-point literal
1.433 - * ({@code 1.0f} is a {@code float} value;
1.434 - * {@code 1.0d} is a {@code double} value), do
1.435 - * <em>not</em> influence the results of this method. In other
1.436 - * words, the numerical value of the input string is converted
1.437 - * directly to the target floating-point type. The two-step
1.438 - * sequence of conversions, string to {@code float} followed
1.439 - * by {@code float} to {@code double}, is <em>not</em>
1.440 - * equivalent to converting a string directly to
1.441 - * {@code double}. For example, the {@code float}
1.442 - * literal {@code 0.1f} is equal to the {@code double}
1.443 - * value {@code 0.10000000149011612}; the {@code float}
1.444 - * literal {@code 0.1f} represents a different numerical
1.445 - * value than the {@code double} literal
1.446 - * {@code 0.1}. (The numerical value 0.1 cannot be exactly
1.447 - * represented in a binary floating-point number.)
1.448 - *
1.449 - * <p>To avoid calling this method on an invalid string and having
1.450 - * a {@code NumberFormatException} be thrown, the regular
1.451 - * expression below can be used to screen the input string:
1.452 - *
1.453 - * <code>
1.454 - * <pre>
1.455 - * final String Digits = "(\\p{Digit}+)";
1.456 - * final String HexDigits = "(\\p{XDigit}+)";
1.457 - * // an exponent is 'e' or 'E' followed by an optionally
1.458 - * // signed decimal integer.
1.459 - * final String Exp = "[eE][+-]?"+Digits;
1.460 - * final String fpRegex =
1.461 - * ("[\\x00-\\x20]*"+ // Optional leading "whitespace"
1.462 - * "[+-]?(" + // Optional sign character
1.463 - * "NaN|" + // "NaN" string
1.464 - * "Infinity|" + // "Infinity" string
1.465 - *
1.466 - * // A decimal floating-point string representing a finite positive
1.467 - * // number without a leading sign has at most five basic pieces:
1.468 - * // Digits . Digits ExponentPart FloatTypeSuffix
1.469 - * //
1.470 - * // Since this method allows integer-only strings as input
1.471 - * // in addition to strings of floating-point literals, the
1.472 - * // two sub-patterns below are simplifications of the grammar
1.473 - * // productions from section 3.10.2 of
1.474 - * // <cite>The Java™ Language Specification</cite>.
1.475 - *
1.476 - * // Digits ._opt Digits_opt ExponentPart_opt FloatTypeSuffix_opt
1.477 - * "((("+Digits+"(\\.)?("+Digits+"?)("+Exp+")?)|"+
1.478 - *
1.479 - * // . Digits ExponentPart_opt FloatTypeSuffix_opt
1.480 - * "(\\.("+Digits+")("+Exp+")?)|"+
1.481 - *
1.482 - * // Hexadecimal strings
1.483 - * "((" +
1.484 - * // 0[xX] HexDigits ._opt BinaryExponent FloatTypeSuffix_opt
1.485 - * "(0[xX]" + HexDigits + "(\\.)?)|" +
1.486 - *
1.487 - * // 0[xX] HexDigits_opt . HexDigits BinaryExponent FloatTypeSuffix_opt
1.488 - * "(0[xX]" + HexDigits + "?(\\.)" + HexDigits + ")" +
1.489 - *
1.490 - * ")[pP][+-]?" + Digits + "))" +
1.491 - * "[fFdD]?))" +
1.492 - * "[\\x00-\\x20]*");// Optional trailing "whitespace"
1.493 - *
1.494 - * if (Pattern.matches(fpRegex, myString))
1.495 - * Double.valueOf(myString); // Will not throw NumberFormatException
1.496 - * else {
1.497 - * // Perform suitable alternative action
1.498 - * }
1.499 - * </pre>
1.500 - * </code>
1.501 - *
1.502 - * @param s the string to be parsed.
1.503 - * @return a {@code Double} object holding the value
1.504 - * represented by the {@code String} argument.
1.505 - * @throws NumberFormatException if the string does not contain a
1.506 - * parsable number.
1.507 - */
1.508 - @JavaScriptBody(args="s", body="return parseFloat(s);")
1.509 - public static Double valueOf(String s) throws NumberFormatException {
1.510 - throw new UnsupportedOperationException();
1.511 -// return new Double(FloatingDecimal.readJavaFormatString(s).doubleValue());
1.512 - }
1.513 -
1.514 - /**
1.515 - * Returns a {@code Double} instance representing the specified
1.516 - * {@code double} value.
1.517 - * If a new {@code Double} instance is not required, this method
1.518 - * should generally be used in preference to the constructor
1.519 - * {@link #Double(double)}, as this method is likely to yield
1.520 - * significantly better space and time performance by caching
1.521 - * frequently requested values.
1.522 - *
1.523 - * @param d a double value.
1.524 - * @return a {@code Double} instance representing {@code d}.
1.525 - * @since 1.5
1.526 - */
1.527 - public static Double valueOf(double d) {
1.528 - return new Double(d);
1.529 - }
1.530 -
1.531 - /**
1.532 - * Returns a new {@code double} initialized to the value
1.533 - * represented by the specified {@code String}, as performed
1.534 - * by the {@code valueOf} method of class
1.535 - * {@code Double}.
1.536 - *
1.537 - * @param s the string to be parsed.
1.538 - * @return the {@code double} value represented by the string
1.539 - * argument.
1.540 - * @throws NullPointerException if the string is null
1.541 - * @throws NumberFormatException if the string does not contain
1.542 - * a parsable {@code double}.
1.543 - * @see java.lang.Double#valueOf(String)
1.544 - * @since 1.2
1.545 - */
1.546 - @JavaScriptBody(args="s", body="return parseFloat(s);")
1.547 - public static double parseDouble(String s) throws NumberFormatException {
1.548 - throw new UnsupportedOperationException();
1.549 -// return FloatingDecimal.readJavaFormatString(s).doubleValue();
1.550 - }
1.551 -
1.552 - /**
1.553 - * Returns {@code true} if the specified number is a
1.554 - * Not-a-Number (NaN) value, {@code false} otherwise.
1.555 - *
1.556 - * @param v the value to be tested.
1.557 - * @return {@code true} if the value of the argument is NaN;
1.558 - * {@code false} otherwise.
1.559 - */
1.560 - static public boolean isNaN(double v) {
1.561 - return (v != v);
1.562 - }
1.563 -
1.564 - /**
1.565 - * Returns {@code true} if the specified number is infinitely
1.566 - * large in magnitude, {@code false} otherwise.
1.567 - *
1.568 - * @param v the value to be tested.
1.569 - * @return {@code true} if the value of the argument is positive
1.570 - * infinity or negative infinity; {@code false} otherwise.
1.571 - */
1.572 - static public boolean isInfinite(double v) {
1.573 - return (v == POSITIVE_INFINITY) || (v == NEGATIVE_INFINITY);
1.574 - }
1.575 -
1.576 - /**
1.577 - * The value of the Double.
1.578 - *
1.579 - * @serial
1.580 - */
1.581 - private final double value;
1.582 -
1.583 - /**
1.584 - * Constructs a newly allocated {@code Double} object that
1.585 - * represents the primitive {@code double} argument.
1.586 - *
1.587 - * @param value the value to be represented by the {@code Double}.
1.588 - */
1.589 - public Double(double value) {
1.590 - this.value = value;
1.591 - }
1.592 -
1.593 - /**
1.594 - * Constructs a newly allocated {@code Double} object that
1.595 - * represents the floating-point value of type {@code double}
1.596 - * represented by the string. The string is converted to a
1.597 - * {@code double} value as if by the {@code valueOf} method.
1.598 - *
1.599 - * @param s a string to be converted to a {@code Double}.
1.600 - * @throws NumberFormatException if the string does not contain a
1.601 - * parsable number.
1.602 - * @see java.lang.Double#valueOf(java.lang.String)
1.603 - */
1.604 - public Double(String s) throws NumberFormatException {
1.605 - // REMIND: this is inefficient
1.606 - this(valueOf(s).doubleValue());
1.607 - }
1.608 -
1.609 - /**
1.610 - * Returns {@code true} if this {@code Double} value is
1.611 - * a Not-a-Number (NaN), {@code false} otherwise.
1.612 - *
1.613 - * @return {@code true} if the value represented by this object is
1.614 - * NaN; {@code false} otherwise.
1.615 - */
1.616 - public boolean isNaN() {
1.617 - return isNaN(value);
1.618 - }
1.619 -
1.620 - /**
1.621 - * Returns {@code true} if this {@code Double} value is
1.622 - * infinitely large in magnitude, {@code false} otherwise.
1.623 - *
1.624 - * @return {@code true} if the value represented by this object is
1.625 - * positive infinity or negative infinity;
1.626 - * {@code false} otherwise.
1.627 - */
1.628 - public boolean isInfinite() {
1.629 - return isInfinite(value);
1.630 - }
1.631 -
1.632 - /**
1.633 - * Returns a string representation of this {@code Double} object.
1.634 - * The primitive {@code double} value represented by this
1.635 - * object is converted to a string exactly as if by the method
1.636 - * {@code toString} of one argument.
1.637 - *
1.638 - * @return a {@code String} representation of this object.
1.639 - * @see java.lang.Double#toString(double)
1.640 - */
1.641 - public String toString() {
1.642 - return toString(value);
1.643 - }
1.644 -
1.645 - /**
1.646 - * Returns the value of this {@code Double} as a {@code byte} (by
1.647 - * casting to a {@code byte}).
1.648 - *
1.649 - * @return the {@code double} value represented by this object
1.650 - * converted to type {@code byte}
1.651 - * @since JDK1.1
1.652 - */
1.653 - public byte byteValue() {
1.654 - return (byte)value;
1.655 - }
1.656 -
1.657 - /**
1.658 - * Returns the value of this {@code Double} as a
1.659 - * {@code short} (by casting to a {@code short}).
1.660 - *
1.661 - * @return the {@code double} value represented by this object
1.662 - * converted to type {@code short}
1.663 - * @since JDK1.1
1.664 - */
1.665 - public short shortValue() {
1.666 - return (short)value;
1.667 - }
1.668 -
1.669 - /**
1.670 - * Returns the value of this {@code Double} as an
1.671 - * {@code int} (by casting to type {@code int}).
1.672 - *
1.673 - * @return the {@code double} value represented by this object
1.674 - * converted to type {@code int}
1.675 - */
1.676 - public int intValue() {
1.677 - return (int)value;
1.678 - }
1.679 -
1.680 - /**
1.681 - * Returns the value of this {@code Double} as a
1.682 - * {@code long} (by casting to type {@code long}).
1.683 - *
1.684 - * @return the {@code double} value represented by this object
1.685 - * converted to type {@code long}
1.686 - */
1.687 - public long longValue() {
1.688 - return (long)value;
1.689 - }
1.690 -
1.691 - /**
1.692 - * Returns the {@code float} value of this
1.693 - * {@code Double} object.
1.694 - *
1.695 - * @return the {@code double} value represented by this object
1.696 - * converted to type {@code float}
1.697 - * @since JDK1.0
1.698 - */
1.699 - public float floatValue() {
1.700 - return (float)value;
1.701 - }
1.702 -
1.703 - /**
1.704 - * Returns the {@code double} value of this
1.705 - * {@code Double} object.
1.706 - *
1.707 - * @return the {@code double} value represented by this object
1.708 - */
1.709 - public double doubleValue() {
1.710 - return (double)value;
1.711 - }
1.712 -
1.713 - /**
1.714 - * Returns a hash code for this {@code Double} object. The
1.715 - * result is the exclusive OR of the two halves of the
1.716 - * {@code long} integer bit representation, exactly as
1.717 - * produced by the method {@link #doubleToLongBits(double)}, of
1.718 - * the primitive {@code double} value represented by this
1.719 - * {@code Double} object. That is, the hash code is the value
1.720 - * of the expression:
1.721 - *
1.722 - * <blockquote>
1.723 - * {@code (int)(v^(v>>>32))}
1.724 - * </blockquote>
1.725 - *
1.726 - * where {@code v} is defined by:
1.727 - *
1.728 - * <blockquote>
1.729 - * {@code long v = Double.doubleToLongBits(this.doubleValue());}
1.730 - * </blockquote>
1.731 - *
1.732 - * @return a {@code hash code} value for this object.
1.733 - */
1.734 - public int hashCode() {
1.735 - long bits = doubleToLongBits(value);
1.736 - return (int)(bits ^ (bits >>> 32));
1.737 - }
1.738 -
1.739 - /**
1.740 - * Compares this object against the specified object. The result
1.741 - * is {@code true} if and only if the argument is not
1.742 - * {@code null} and is a {@code Double} object that
1.743 - * represents a {@code double} that has the same value as the
1.744 - * {@code double} represented by this object. For this
1.745 - * purpose, two {@code double} values are considered to be
1.746 - * the same if and only if the method {@link
1.747 - * #doubleToLongBits(double)} returns the identical
1.748 - * {@code long} value when applied to each.
1.749 - *
1.750 - * <p>Note that in most cases, for two instances of class
1.751 - * {@code Double}, {@code d1} and {@code d2}, the
1.752 - * value of {@code d1.equals(d2)} is {@code true} if and
1.753 - * only if
1.754 - *
1.755 - * <blockquote>
1.756 - * {@code d1.doubleValue() == d2.doubleValue()}
1.757 - * </blockquote>
1.758 - *
1.759 - * <p>also has the value {@code true}. However, there are two
1.760 - * exceptions:
1.761 - * <ul>
1.762 - * <li>If {@code d1} and {@code d2} both represent
1.763 - * {@code Double.NaN}, then the {@code equals} method
1.764 - * returns {@code true}, even though
1.765 - * {@code Double.NaN==Double.NaN} has the value
1.766 - * {@code false}.
1.767 - * <li>If {@code d1} represents {@code +0.0} while
1.768 - * {@code d2} represents {@code -0.0}, or vice versa,
1.769 - * the {@code equal} test has the value {@code false},
1.770 - * even though {@code +0.0==-0.0} has the value {@code true}.
1.771 - * </ul>
1.772 - * This definition allows hash tables to operate properly.
1.773 - * @param obj the object to compare with.
1.774 - * @return {@code true} if the objects are the same;
1.775 - * {@code false} otherwise.
1.776 - * @see java.lang.Double#doubleToLongBits(double)
1.777 - */
1.778 - public boolean equals(Object obj) {
1.779 - return (obj instanceof Double)
1.780 - && (((Double)obj).value) == value;
1.781 - }
1.782 -
1.783 - /**
1.784 - * Returns a representation of the specified floating-point value
1.785 - * according to the IEEE 754 floating-point "double
1.786 - * format" bit layout.
1.787 - *
1.788 - * <p>Bit 63 (the bit that is selected by the mask
1.789 - * {@code 0x8000000000000000L}) represents the sign of the
1.790 - * floating-point number. Bits
1.791 - * 62-52 (the bits that are selected by the mask
1.792 - * {@code 0x7ff0000000000000L}) represent the exponent. Bits 51-0
1.793 - * (the bits that are selected by the mask
1.794 - * {@code 0x000fffffffffffffL}) represent the significand
1.795 - * (sometimes called the mantissa) of the floating-point number.
1.796 - *
1.797 - * <p>If the argument is positive infinity, the result is
1.798 - * {@code 0x7ff0000000000000L}.
1.799 - *
1.800 - * <p>If the argument is negative infinity, the result is
1.801 - * {@code 0xfff0000000000000L}.
1.802 - *
1.803 - * <p>If the argument is NaN, the result is
1.804 - * {@code 0x7ff8000000000000L}.
1.805 - *
1.806 - * <p>In all cases, the result is a {@code long} integer that, when
1.807 - * given to the {@link #longBitsToDouble(long)} method, will produce a
1.808 - * floating-point value the same as the argument to
1.809 - * {@code doubleToLongBits} (except all NaN values are
1.810 - * collapsed to a single "canonical" NaN value).
1.811 - *
1.812 - * @param value a {@code double} precision floating-point number.
1.813 - * @return the bits that represent the floating-point number.
1.814 - */
1.815 - public static long doubleToLongBits(double value) {
1.816 - throw new UnsupportedOperationException();
1.817 -// long result = doubleToRawLongBits(value);
1.818 -// // Check for NaN based on values of bit fields, maximum
1.819 -// // exponent and nonzero significand.
1.820 -// if ( ((result & DoubleConsts.EXP_BIT_MASK) ==
1.821 -// DoubleConsts.EXP_BIT_MASK) &&
1.822 -// (result & DoubleConsts.SIGNIF_BIT_MASK) != 0L)
1.823 -// result = 0x7ff8000000000000L;
1.824 -// return result;
1.825 - }
1.826 -
1.827 - /**
1.828 - * Returns a representation of the specified floating-point value
1.829 - * according to the IEEE 754 floating-point "double
1.830 - * format" bit layout, preserving Not-a-Number (NaN) values.
1.831 - *
1.832 - * <p>Bit 63 (the bit that is selected by the mask
1.833 - * {@code 0x8000000000000000L}) represents the sign of the
1.834 - * floating-point number. Bits
1.835 - * 62-52 (the bits that are selected by the mask
1.836 - * {@code 0x7ff0000000000000L}) represent the exponent. Bits 51-0
1.837 - * (the bits that are selected by the mask
1.838 - * {@code 0x000fffffffffffffL}) represent the significand
1.839 - * (sometimes called the mantissa) of the floating-point number.
1.840 - *
1.841 - * <p>If the argument is positive infinity, the result is
1.842 - * {@code 0x7ff0000000000000L}.
1.843 - *
1.844 - * <p>If the argument is negative infinity, the result is
1.845 - * {@code 0xfff0000000000000L}.
1.846 - *
1.847 - * <p>If the argument is NaN, the result is the {@code long}
1.848 - * integer representing the actual NaN value. Unlike the
1.849 - * {@code doubleToLongBits} method,
1.850 - * {@code doubleToRawLongBits} does not collapse all the bit
1.851 - * patterns encoding a NaN to a single "canonical" NaN
1.852 - * value.
1.853 - *
1.854 - * <p>In all cases, the result is a {@code long} integer that,
1.855 - * when given to the {@link #longBitsToDouble(long)} method, will
1.856 - * produce a floating-point value the same as the argument to
1.857 - * {@code doubleToRawLongBits}.
1.858 - *
1.859 - * @param value a {@code double} precision floating-point number.
1.860 - * @return the bits that represent the floating-point number.
1.861 - * @since 1.3
1.862 - */
1.863 - public static native long doubleToRawLongBits(double value);
1.864 -
1.865 - /**
1.866 - * Returns the {@code double} value corresponding to a given
1.867 - * bit representation.
1.868 - * The argument is considered to be a representation of a
1.869 - * floating-point value according to the IEEE 754 floating-point
1.870 - * "double format" bit layout.
1.871 - *
1.872 - * <p>If the argument is {@code 0x7ff0000000000000L}, the result
1.873 - * is positive infinity.
1.874 - *
1.875 - * <p>If the argument is {@code 0xfff0000000000000L}, the result
1.876 - * is negative infinity.
1.877 - *
1.878 - * <p>If the argument is any value in the range
1.879 - * {@code 0x7ff0000000000001L} through
1.880 - * {@code 0x7fffffffffffffffL} or in the range
1.881 - * {@code 0xfff0000000000001L} through
1.882 - * {@code 0xffffffffffffffffL}, the result is a NaN. No IEEE
1.883 - * 754 floating-point operation provided by Java can distinguish
1.884 - * between two NaN values of the same type with different bit
1.885 - * patterns. Distinct values of NaN are only distinguishable by
1.886 - * use of the {@code Double.doubleToRawLongBits} method.
1.887 - *
1.888 - * <p>In all other cases, let <i>s</i>, <i>e</i>, and <i>m</i> be three
1.889 - * values that can be computed from the argument:
1.890 - *
1.891 - * <blockquote><pre>
1.892 - * int s = ((bits >> 63) == 0) ? 1 : -1;
1.893 - * int e = (int)((bits >> 52) & 0x7ffL);
1.894 - * long m = (e == 0) ?
1.895 - * (bits & 0xfffffffffffffL) << 1 :
1.896 - * (bits & 0xfffffffffffffL) | 0x10000000000000L;
1.897 - * </pre></blockquote>
1.898 - *
1.899 - * Then the floating-point result equals the value of the mathematical
1.900 - * expression <i>s</i>·<i>m</i>·2<sup><i>e</i>-1075</sup>.
1.901 - *
1.902 - * <p>Note that this method may not be able to return a
1.903 - * {@code double} NaN with exactly same bit pattern as the
1.904 - * {@code long} argument. IEEE 754 distinguishes between two
1.905 - * kinds of NaNs, quiet NaNs and <i>signaling NaNs</i>. The
1.906 - * differences between the two kinds of NaN are generally not
1.907 - * visible in Java. Arithmetic operations on signaling NaNs turn
1.908 - * them into quiet NaNs with a different, but often similar, bit
1.909 - * pattern. However, on some processors merely copying a
1.910 - * signaling NaN also performs that conversion. In particular,
1.911 - * copying a signaling NaN to return it to the calling method
1.912 - * may perform this conversion. So {@code longBitsToDouble}
1.913 - * may not be able to return a {@code double} with a
1.914 - * signaling NaN bit pattern. Consequently, for some
1.915 - * {@code long} values,
1.916 - * {@code doubleToRawLongBits(longBitsToDouble(start))} may
1.917 - * <i>not</i> equal {@code start}. Moreover, which
1.918 - * particular bit patterns represent signaling NaNs is platform
1.919 - * dependent; although all NaN bit patterns, quiet or signaling,
1.920 - * must be in the NaN range identified above.
1.921 - *
1.922 - * @param bits any {@code long} integer.
1.923 - * @return the {@code double} floating-point value with the same
1.924 - * bit pattern.
1.925 - */
1.926 - public static native double longBitsToDouble(long bits);
1.927 -
1.928 - /**
1.929 - * Compares two {@code Double} objects numerically. There
1.930 - * are two ways in which comparisons performed by this method
1.931 - * differ from those performed by the Java language numerical
1.932 - * comparison operators ({@code <, <=, ==, >=, >})
1.933 - * when applied to primitive {@code double} values:
1.934 - * <ul><li>
1.935 - * {@code Double.NaN} is considered by this method
1.936 - * to be equal to itself and greater than all other
1.937 - * {@code double} values (including
1.938 - * {@code Double.POSITIVE_INFINITY}).
1.939 - * <li>
1.940 - * {@code 0.0d} is considered by this method to be greater
1.941 - * than {@code -0.0d}.
1.942 - * </ul>
1.943 - * This ensures that the <i>natural ordering</i> of
1.944 - * {@code Double} objects imposed by this method is <i>consistent
1.945 - * with equals</i>.
1.946 - *
1.947 - * @param anotherDouble the {@code Double} to be compared.
1.948 - * @return the value {@code 0} if {@code anotherDouble} is
1.949 - * numerically equal to this {@code Double}; a value
1.950 - * less than {@code 0} if this {@code Double}
1.951 - * is numerically less than {@code anotherDouble};
1.952 - * and a value greater than {@code 0} if this
1.953 - * {@code Double} is numerically greater than
1.954 - * {@code anotherDouble}.
1.955 - *
1.956 - * @since 1.2
1.957 - */
1.958 - public int compareTo(Double anotherDouble) {
1.959 - return Double.compare(value, anotherDouble.value);
1.960 - }
1.961 -
1.962 - /**
1.963 - * Compares the two specified {@code double} values. The sign
1.964 - * of the integer value returned is the same as that of the
1.965 - * integer that would be returned by the call:
1.966 - * <pre>
1.967 - * new Double(d1).compareTo(new Double(d2))
1.968 - * </pre>
1.969 - *
1.970 - * @param d1 the first {@code double} to compare
1.971 - * @param d2 the second {@code double} to compare
1.972 - * @return the value {@code 0} if {@code d1} is
1.973 - * numerically equal to {@code d2}; a value less than
1.974 - * {@code 0} if {@code d1} is numerically less than
1.975 - * {@code d2}; and a value greater than {@code 0}
1.976 - * if {@code d1} is numerically greater than
1.977 - * {@code d2}.
1.978 - * @since 1.4
1.979 - */
1.980 - public static int compare(double d1, double d2) {
1.981 - if (d1 < d2)
1.982 - return -1; // Neither val is NaN, thisVal is smaller
1.983 - if (d1 > d2)
1.984 - return 1; // Neither val is NaN, thisVal is larger
1.985 -
1.986 - // Cannot use doubleToRawLongBits because of possibility of NaNs.
1.987 - long thisBits = Double.doubleToLongBits(d1);
1.988 - long anotherBits = Double.doubleToLongBits(d2);
1.989 -
1.990 - return (thisBits == anotherBits ? 0 : // Values are equal
1.991 - (thisBits < anotherBits ? -1 : // (-0.0, 0.0) or (!NaN, NaN)
1.992 - 1)); // (0.0, -0.0) or (NaN, !NaN)
1.993 - }
1.994 -
1.995 - /** use serialVersionUID from JDK 1.0.2 for interoperability */
1.996 - private static final long serialVersionUID = -9172774392245257468L;
1.997 -}