From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/lang/Byte.java | 373 ++++++++++++++++++++++++++++++++++ 1 file changed, 373 insertions(+) create mode 100644 libjava/classpath/java/lang/Byte.java (limited to 'libjava/classpath/java/lang/Byte.java') diff --git a/libjava/classpath/java/lang/Byte.java b/libjava/classpath/java/lang/Byte.java new file mode 100644 index 000000000..a1536e1be --- /dev/null +++ b/libjava/classpath/java/lang/Byte.java @@ -0,0 +1,373 @@ +/* Byte.java -- object wrapper for byte + Copyright (C) 1998, 2001, 2002, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.lang; + +/** + * Instances of class Byte represent primitive byte + * values. + * + * Additionally, this class provides various helper functions and variables + * useful to bytes. + * + * @author Paul Fisher + * @author John Keiser + * @author Per Bothner + * @author Eric Blake (ebb9@email.byu.edu) + * @author Tom Tromey (tromey@redhat.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.1 + * @status updated to 1.5 + */ +public final class Byte extends Number implements Comparable +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -7183698231559129828L; + + /** + * The minimum value a byte can represent is -128 (or + * -27). + */ + public static final byte MIN_VALUE = -128; + + /** + * The maximum value a byte can represent is 127 (or + * 27 - 1). + */ + public static final byte MAX_VALUE = 127; + + /** + * The primitive type byte is represented by this + * Class object. + */ + public static final Class TYPE = (Class) VMClassLoader.getPrimitiveClass('B'); + + /** + * The number of bits needed to represent a byte. + * @since 1.5 + */ + public static final int SIZE = 8; + + // This caches Byte values, and is used by boxing conversions via + // valueOf(). We're required to cache all possible values here. + private static Byte[] byteCache = new Byte[MAX_VALUE - MIN_VALUE + 1]; + static + { + for (int i=MIN_VALUE; i <= MAX_VALUE; i++) + byteCache[i - MIN_VALUE] = new Byte((byte) i); + } + + + /** + * The immutable value of this Byte. + * + * @serial the wrapped byte + */ + private final byte value; + + /** + * Create a Byte object representing the value of the + * byte argument. + * + * @param value the value to use + */ + public Byte(byte value) + { + this.value = value; + } + + /** + * Create a Byte object representing the value specified + * by the String argument + * + * @param s the string to convert + * @throws NumberFormatException if the String does not contain a byte + * @see #valueOf(String) + */ + public Byte(String s) + { + value = parseByte(s, 10); + } + + /** + * Converts the byte to a String and assumes + * a radix of 10. + * + * @param b the byte to convert to String + * @return the String representation of the argument + */ + public static String toString(byte b) + { + return String.valueOf(b); + } + + /** + * Converts the specified String into a byte. + * This function assumes a radix of 10. + * + * @param s the String to convert + * @return the byte value of s + * @throws NumberFormatException if s cannot be parsed as a + * byte + * @see #parseByte(String) + */ + public static byte parseByte(String s) + { + return parseByte(s, 10); + } + + /** + * Converts the specified String into an int + * using the specified radix (base). The string must not be null + * or empty. It may begin with an optional '-', which will negate the answer, + * provided that there are also valid digits. Each digit is parsed as if by + * Character.digit(d, radix), and must be in the range + * 0 to radix - 1. Finally, the result must be + * within MIN_VALUE to MAX_VALUE, inclusive. + * Unlike Double.parseDouble, you may not have a leading '+'. + * + * @param s the String to convert + * @param radix the radix (base) to use in the conversion + * @return the String argument converted to byte + * @throws NumberFormatException if s cannot be parsed as a + * byte + */ + public static byte parseByte(String s, int radix) + { + int i = Integer.parseInt(s, radix, false); + if ((byte) i != i) + throw new NumberFormatException(); + return (byte) i; + } + + /** + * Creates a new Byte object using the String + * and specified radix (base). + * + * @param s the String to convert + * @param radix the radix (base) to convert with + * @return the new Byte + * @throws NumberFormatException if s cannot be parsed as a + * byte + * @see #parseByte(String, int) + */ + public static Byte valueOf(String s, int radix) + { + return valueOf(parseByte(s, radix)); + } + + /** + * Creates a new Byte object using the String, + * assuming a radix of 10. + * + * @param s the String to convert + * @return the new Byte + * @throws NumberFormatException if s cannot be parsed as a + * byte + * @see #Byte(String) + * @see #parseByte(String) + */ + public static Byte valueOf(String s) + { + return valueOf(parseByte(s, 10)); + } + + /** + * Returns a Byte object wrapping the value. + * In contrast to the Byte constructor, this method + * will cache some values. It is used by boxing conversion. + * + * @param val the value to wrap + * @return the Byte + */ + public static Byte valueOf(byte val) + { + return byteCache[val - MIN_VALUE]; + } + + /** + * Convert the specified String into a Byte. + * The String may represent decimal, hexadecimal, or + * octal numbers. + * + *

The extended BNF grammar is as follows:
+ * 

+   * DecodableString:
+   *      ( [ - ] DecimalNumber )
+   *    | ( [ - ] ( 0x | 0X
+   *              | # ) { HexDigit }+ )
+   *    | ( [ - ] 0 { OctalDigit } )
+   * DecimalNumber:
+   *        DecimalDigit except '0' { DecimalDigit }
+   * DecimalDigit:
+   *        Character.digit(d, 10) has value 0 to 9
+   * OctalDigit:
+   *        Character.digit(d, 8) has value 0 to 7
+   * DecimalDigit:
+   *        Character.digit(d, 16) has value 0 to 15
+   *
+ * Finally, the value must be in the range MIN_VALUE to + * MAX_VALUE, or an exception is thrown. + * + * @param s the String to interpret + * @return the value of the String as a Byte + * @throws NumberFormatException if s cannot be parsed as a + * byte + * @throws NullPointerException if s is null + * @see Integer#decode(String) + */ + public static Byte decode(String s) + { + int i = Integer.parseInt(s, 10, true); + if ((byte) i != i) + throw new NumberFormatException(); + return valueOf((byte) i); + } + + /** + * Return the value of this Byte. + * + * @return the byte value + */ + public byte byteValue() + { + return value; + } + + /** + * Return the value of this Byte as a short. + * + * @return the short value + */ + public short shortValue() + { + return value; + } + + /** + * Return the value of this Byte as an int. + * + * @return the int value + */ + public int intValue() + { + return value; + } + + /** + * Return the value of this Byte as a long. + * + * @return the long value + */ + public long longValue() + { + return value; + } + + /** + * Return the value of this Byte as a float. + * + * @return the float value + */ + public float floatValue() + { + return value; + } + + /** + * Return the value of this Byte as a double. + * + * @return the double value + */ + public double doubleValue() + { + return value; + } + + /** + * Converts the Byte value to a String and + * assumes a radix of 10. + * + * @return the String representation of this Byte + * @see Integer#toString() + */ + public String toString() + { + return String.valueOf(value); + } + + /** + * Return a hashcode representing this Object. Byte's hash + * code is simply its value. + * + * @return this Object's hash code + */ + public int hashCode() + { + return value; + } + + /** + * Returns true if obj is an instance of + * Byte and represents the same byte value. + * + * @param obj the object to compare + * @return whether these Objects are semantically equal + */ + public boolean equals(Object obj) + { + return obj instanceof Byte && value == ((Byte) obj).value; + } + + /** + * Compare two Bytes numerically by comparing their byte values. + * The result is positive if the first is greater, negative if the second + * is greater, and 0 if the two are equal. + * + * @param b the Byte to compare + * @return the comparison + * @since 1.2 + */ + public int compareTo(Byte b) + { + return value - b.value; + } + +} -- cgit v1.2.3