+++ /dev/null
-/* java.lang.Integer
- Copyright (C) 1998, 1999, 2001 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., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 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 <code>Integer</code> represent primitive
- * <code>int</code> values.
- *
- * Additionally, this class provides various helper functions and variables
- * related to ints.
- *
- * @author Paul Fisher
- * @author John Keiser
- * @author Warren Levy
- * @since JDK 1.0
- */
-public final class Integer extends Number implements Comparable
-{
- // compatible with JDK 1.0.2+
- private static final long serialVersionUID = 1360826667806852920L;
-
- /**
- * The minimum value an <code>int</code> can represent is -2147483648.
- */
- public static final int MIN_VALUE = 0x80000000;
-
- /**
- * The maximum value an <code>int</code> can represent is 2147483647.
- */
- public static final int MAX_VALUE = 0x7fffffff;
-
- /**
- * The primitive type <code>int</code> is represented by this
- * <code>Class</code> object.
- */
- public static final Class TYPE = VMClassLoader.getPrimitiveClass ('I');
-
- /**
- * The immutable value of this Integer.
- */
- private final int value;
-
- /**
- * Create an <code>Integer</code> object representing the value of the
- * <code>int</code> argument.
- *
- * @param value the value to use
- */
- public Integer(int value)
- {
- this.value = value;
- }
-
- /**
- * Create an <code>Integer</code> object representing the value of the
- * argument after conversion to an <code>int</code>.
- *
- * @param s the string to convert.
- */
- public Integer(String s) throws NumberFormatException
- {
- value = parseInt(s, 10);
- }
-
- /**
- * Return a hashcode representing this Object.
- *
- * <code>Integer</code>'s hash code is calculated by simply returning its
- * value.
- *
- * @return this Object's hash code.
- */
- public int hashCode()
- {
- return value;
- }
-
- /**
- * If the <code>Object</code> is not <code>null</code>, is an
- * <code>instanceof</code> <code>Integer</code>, and represents
- * the same primitive <code>int</code> value return
- * <code>true</code>. Otherwise <code>false</code> is returned.
- */
- public boolean equals(Object obj)
- {
- return obj instanceof Integer && value == ((Integer)obj).value;
- }
-
- /**
- * Get the specified system property as an <code>Integer</code>.
- *
- * The <code>decode()</code> method will be used to interpret the value of
- * the property.
- * @param nm the name of the system property
- * @return the system property as an <code>Integer</code>, or
- * <code>null</code> if the property is not found or cannot be
- * decoded as an <code>Integer</code>.
- * @see java.lang.System#getProperty(java.lang.String)
- * @see #decode(int)
- */
- public static Integer getInteger(String nm)
- {
- return getInteger(nm, null);
- }
-
- /**
- * Get the specified system property as an <code>Integer</code>, or use a
- * default <code>int</code> value if the property is not found or is not
- * decodable.
- *
- * The <code>decode()</code> method will be used to interpret the value of
- * the property.
- *
- * @param nm the name of the system property
- * @param val the default value to use if the property is not found or not
- * a number.
- * @return the system property as an <code>Integer</code>, or the default
- * value if the property is not found or cannot be decoded as an
- * <code>Integer</code>.
- * @see java.lang.System#getProperty(java.lang.String)
- * @see #decode(int)
- * @see #getInteger(java.lang.String,java.lang.Integer)
- */
- public static Integer getInteger(String nm, int val)
- {
- Integer result = getInteger(nm, null);
- return (result == null) ? new Integer(val) : result;
- }
-
- /**
- * Get the specified system property as an <code>Integer</code>, or use a
- * default <code>Integer</code> value if the property is not found or is
- * not decodable.
- *
- * The <code>decode()</code> method will be used to interpret the value of
- * the property.
- *
- * @param nm the name of the system property
- * @param val the default value to use if the property is not found or not
- * a number.
- * @return the system property as an <code>Integer</code>, or the default
- * value if the property is not found or cannot be decoded as an
- * <code>Integer</code>.
- * @see java.lang.System#getProperty(java.lang.String)
- * @see #decode(int)
- * @see #getInteger(java.lang.String,int)
- */
- public static Integer getInteger(String nm, Integer def)
- {
- if (nm == null || "".equals(nm))
- return def;
- nm = System.getProperty(nm);
- if (nm == null) return def;
- try
- {
- return decode(nm);
- }
- catch (NumberFormatException e)
- {
- return def;
- }
- }
-
- private static String toUnsignedString(int num, int exp)
- {
- // Use an array large enough for a binary number.
- int radix = 1 << exp;
- int mask = radix - 1;
- char[] buffer = new char[32];
- int i = 32;
- do
- {
- buffer[--i] = Character.forDigit(num & mask, radix);
- num = num >>> exp;
- }
- while (num != 0);
-
- return String.valueOf(buffer, i, 32-i);
- }
-
- /**
- * Converts the <code>int</code> to a <code>String</code> assuming it is
- * unsigned in base 16.
- * @param i the <code>int</code> to convert to <code>String</code>
- * @return the <code>String</code> representation of the argument.
- */
- public static String toHexString(int i)
- {
- return toUnsignedString(i, 4);
- }
-
- /**
- * Converts the <code>int</code> to a <code>String</code> assuming it is
- * unsigned in base 8.
- * @param i the <code>int</code> to convert to <code>String</code>
- * @return the <code>String</code> representation of the argument.
- */
- public static String toOctalString(int i)
- {
- return toUnsignedString(i, 3);
- }
-
- /**
- * Converts the <code>int</code> to a <code>String</code> assuming it is
- * unsigned in base 2.
- * @param i the <code>int</code> to convert to <code>String</code>
- * @return the <code>String</code> representation of the argument.
- */
- public static String toBinaryString(int i)
- {
- return toUnsignedString(i, 1);
- }
-
- /**
- * Converts the <code>int</code> to a <code>String</code> and assumes
- * a radix of 10.
- * @param i the <code>int</code> to convert to <code>String</code>
- * @return the <code>String</code> representation of the argument.
- */
- public static String toString(int i)
- {
- // This is tricky: in libgcj, String.valueOf(int) is a fast native
- // implementation. In Classpath it just calls back to
- // Integer.toString(int,int).
- return String.valueOf (i);
- }
-
- /**
- * Converts the <code>Integer</code> value to a <code>String</code> and
- * assumes a radix of 10.
- * @return the <code>String</code> representation of this <code>Integer</code>.
- */
- public String toString()
- {
- return toString (value);
- }
-
- /**
- * Converts the <code>int</code> to a <code>String</code> using
- * the specified radix (base).
- * @param i the <code>int</code> to convert to <code>String</code>.
- * @param radix the radix (base) to use in the conversion.
- * @return the <code>String</code> representation of the argument.
- */
- public static String toString(int num, int radix)
- {
- if (radix < Character.MIN_RADIX || radix > Character.MAX_RADIX)
- radix = 10;
-
- // For negative numbers, print out the absolute value w/ a leading '-'.
- // Use an array large enough for a binary number.
- char[] buffer = new char[33];
- int i = 33;
- boolean isNeg;
- if (num < 0)
- {
- isNeg = true;
- num = -(num);
-
- // When the value is MIN_VALUE, it overflows when made positive
- if (num < 0)
- {
- buffer[--i] = Character.forDigit(-(num + radix) % radix, radix);
- num = -(num / radix);
- }
- }
- else
- isNeg = false;
-
- do
- {
- buffer[--i] = Character.forDigit(num % radix, radix);
- num /= radix;
- }
- while (num > 0);
-
- if (isNeg)
- buffer[--i] = '-';
-
- return String.valueOf(buffer, i, 33-i);
- }
-
- /**
- * Creates a new <code>Integer</code> object using the <code>String</code>,
- * assuming a radix of 10.
- * @param s the <code>String</code> to convert.
- * @return the new <code>Integer</code>.
- * @see #Integer(java.lang.String)
- * @see #parseInt(java.lang.String)
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as an <code>int</code>.
- */
- public static Integer valueOf(String s) throws NumberFormatException
- {
- return new Integer(parseInt(s));
- }
-
- /**
- * Creates a new <code>Integer</code> object using the <code>String</code>
- * and specified radix (base).
- * @param s the <code>String</code> to convert.
- * @param radix the radix (base) to convert with.
- * @return the new <code>Integer</code>.
- * @see #parseInt(java.lang.String,int)
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as an <code>int</code>.
- */
- public static Integer valueOf(String s, int radix)
- throws NumberFormatException
- {
- return new Integer(parseInt(s, radix));
- }
-
- /**
- * Converts the specified <code>String</code> into an <code>int</code>.
- * This function assumes a radix of 10.
- *
- * @param s the <code>String</code> to convert
- * @return the <code>int</code> value of the <code>String</code>
- * argument.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as an <code>int</code>.
- */
- public static int parseInt(String s) throws NumberFormatException
- {
- return parseInt(s, 10);
- }
-
- /**
- * Converts the specified <code>String</code> into an <code>int</code>
- * using the specified radix (base).
- *
- * @param s the <code>String</code> to convert
- * @param radix the radix (base) to use in the conversion
- * @return the <code>String</code> argument converted to </code>int</code>.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>int</code>.
- */
- public static int parseInt(String str, int radix)
- throws NumberFormatException
- {
- final int len;
-
- if (str == null)
- throw new NumberFormatException ();
-
- if ((len = str.length()) == 0 ||
- radix < Character.MIN_RADIX || radix > Character.MAX_RADIX)
- throw new NumberFormatException();
-
- boolean isNeg = false;
- int index = 0;
- if (str.charAt(index) == '-')
- if (len > 1)
- {
- isNeg = true;
- index++;
- }
- else
- throw new NumberFormatException();
-
- return parseInt(str, index, len, isNeg, radix);
- }
-
- private static int parseInt(String str, int index, int len, boolean isNeg,
- int radix)
- throws NumberFormatException
- {
- int val = 0;
- int digval;
-
- int max = MAX_VALUE / radix;
- // We can't directly write `max = (MAX_VALUE + 1) / radix'.
- // So instead we fake it.
- if (isNeg && MAX_VALUE % radix == radix - 1)
- ++max;
-
- for ( ; index < len; index++)
- {
- if (val < 0 || val > max)
- throw new NumberFormatException();
-
- if ((digval = Character.digit(str.charAt(index), radix)) < 0)
- throw new NumberFormatException();
-
- // Throw an exception for overflow if result is negative.
- // However, we special-case the most negative value.
- val = val * radix + digval;
- if (val < 0 && (! isNeg || val != MIN_VALUE))
- throw new NumberFormatException();
- }
-
- return isNeg ? -(val) : val;
- }
-
- /**
- * Convert the specified <code>String</code> into an <code>Integer</code>.
- * The <code>String</code> may represent decimal, hexadecimal, or
- * octal numbers.
- *
- * The <code>String</code> argument is interpreted based on the leading
- * characters. Depending on what the String begins with (after an optional
- * minus sign), the base will be interpreted differently:
- *
- * <table border=1>
- * <tr><th>Leading<br>Characters</th><th>Base</th></tr>
- * <tr><td>#</td><td>16</td></tr>
- * <tr><td>0x</td><td>16</td></tr>
- * <tr><td>0X</td><td>16</td></tr>
- * <tr><td>0</td><td>8</td></tr>
- * <tr><td>Anything<br>Else</td><td>10</td></tr>
- * </table>
- *
- * If the String starts with a minus sign the result is negated.
- *
- * @param str the <code>String</code> to interpret.
- * @return the value of the String as an <code>Integer</code>.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as an <code>int</code>.
- */
- public static Integer decode(String str) throws NumberFormatException
- {
- boolean isNeg = false;
- int index = 0;
- int radix = 10;
- final int len;
-
- if ((len = str.length()) == 0)
- throw new NumberFormatException("empty string");
-
- if (str.charAt(index) == '-')
- {
- // The minus sign should be followed by at least one more char
- if (len > 1)
- {
- isNeg = true;
- index++;
- }
- else
- throw new NumberFormatException();
- }
-
- if (str.charAt(index) == '#')
- {
- radix = 16;
- index++;
- }
- else if (str.charAt(index) == '0')
- {
- index++;
-
- // Check if str is just "0" or "-0"
- if (len == index)
- return new Integer(0);
-
- if (str.charAt(index) == 'x' || str.charAt(index) == 'X')
- {
- radix = 16;
- index++;
- }
- else
- radix = 8;
- }
-
- if (index >= len)
- throw new NumberFormatException("empty value");
-
- return new Integer(parseInt(str, index, len, isNeg, radix));
- }
-
- /** Return the value of this <code>Integer</code> as a <code>byte</code>.
- ** @return the value of this <code>Integer</code> as a <code>byte</code>.
- **/
- public byte byteValue()
- {
- return (byte) value;
- }
-
- /** Return the value of this <code>Integer</code> as a <code>short</code>.
- ** @return the value of this <code>Integer</code> as a <code>short</code>.
- **/
- public short shortValue()
- {
- return (short) value;
- }
-
- /** Return the value of this <code>Integer</code> as an <code>int</code>.
- ** @return the value of this <code>Integer</code> as an <code>int</code>.
- **/
- public int intValue()
- {
- return value;
- }
-
- /** Return the value of this <code>Integer</code> as a <code>long</code>.
- ** @return the value of this <code>Integer</code> as a <code>long</code>.
- **/
- public long longValue()
- {
- return value;
- }
-
- /** Return the value of this <code>Integer</code> as a <code>float</code>.
- ** @return the value of this <code>Integer</code> as a <code>float</code>.
- **/
- public float floatValue()
- {
- return value;
- }
-
- /** Return the value of this <code>Integer</code> as a <code>double</code>.
- ** @return the value of this <code>Integer</code> as a <code>double</code>.
- **/
- public double doubleValue()
- {
- return value;
- }
-
- /**
- * Compare two Integers numerically by comparing their
- * <code>int</code> values.
- * @return a positive value if this <code>Integer</code> is greater
- * in value than the argument <code>Integer</code>; a negative value
- * if this <code>Integer</code> is smaller in value than the argument
- * <code>Integer</code>; and <code>0</code>, zero, if this
- * <code>Integer</code> is equal in value to the argument
- * <code>Integer</code>.
- *
- * @since 1.2
- */
- public int compareTo(Integer i)
- {
- if (this.value == i.value)
- return 0;
-
- // Returns just -1 or 1 on inequality; doing math might overflow.
- if (this.value > i.value)
- return 1;
-
- return -1;
- }
-
- /**
- * Behaves like <code>compareTo(java.lang.Integer)</code> unless the Object
- * is not a <code>Integer</code>. Then it throws a
- * <code>ClassCastException</code>.
- * @exception ClassCastException if the argument is not a
- * <code>Integer</code>.
- *
- * @since 1.2
- */
- public int compareTo(Object o)
- {
- return compareTo((Integer)o);
- }
-}
projects / msp430-gcc.git / blobdiff