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. --- .../java/text/StringCharacterIterator.java | 369 +++++++++++++++++++++ 1 file changed, 369 insertions(+) create mode 100644 libjava/classpath/java/text/StringCharacterIterator.java (limited to 'libjava/classpath/java/text/StringCharacterIterator.java') diff --git a/libjava/classpath/java/text/StringCharacterIterator.java b/libjava/classpath/java/text/StringCharacterIterator.java new file mode 100644 index 000000000..e94e0fbef --- /dev/null +++ b/libjava/classpath/java/text/StringCharacterIterator.java @@ -0,0 +1,369 @@ +/* StringCharacterIterator.java -- Iterate over a character range in a string + Copyright (C) 1998, 1999, 2001, 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.text; + +/** + * This class iterates over a range of characters in a String. + * For a given range of text, a beginning and ending index, + * as well as a current index are defined. These values can be queried + * by the methods in this interface. Additionally, various methods allow + * the index to be set. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public final class StringCharacterIterator implements CharacterIterator +{ + /** + * This is the string to iterate over + */ + private String text; + + /** + * This is the value of the start position of the text range. + */ + private int begin; + + /** + * This is the value of the ending position of the text range. + */ + private int end; + + /** + * This is the current value of the scan index. + */ + private int index; + + /** + * This method initializes a new instance of + * StringCharacterIterator to iterate over the entire + * text of the specified String. The initial index + * value will be set to the first character in the string. + * + * @param text The String to iterate through (null + * not permitted). + * + * @throws NullPointerException if text is null. + */ + public StringCharacterIterator (String text) + { + this (text, 0, text.length (), 0); + } + + /*************************************************************************/ + + /** + * This method initializes a new instance of + * StringCharacterIterator to iterate over the entire + * text of the specified String. The initial index + * value will be set to the specified value. + * + * @param text The String to iterate through. + * @param index The initial index position. + */ + public StringCharacterIterator (String text, int index) + { + this (text, 0, text.length (), index); + } + + /*************************************************************************/ + + /** + * This method initializes a new instance of + * StringCharacterIterator that iterates over the text + * in a subrange of the specified String. The + * beginning and end of the range are specified by the caller, as is + * the initial index position. + * + * @param text The String to iterate through. + * @param begin The beginning position in the character range. + * @param end The ending position in the character range. + * @param index The initial index position. + * + * @throws IllegalArgumentException If any of the range values are + * invalid. + */ + public StringCharacterIterator (String text, int begin, int end, int index) + { + int len = text.length (); + + if ((begin < 0) || (begin > len)) + throw new IllegalArgumentException ("Bad begin position"); + + if ((end < begin) || (end > len)) + throw new IllegalArgumentException ("Bad end position"); + + if ((index < begin) || (index > end)) + throw new IllegalArgumentException ("Bad initial index position"); + + this.text = text; + this.begin = begin; + this.end = end; + this.index = index; + } + + /** + * This is a package level constructor that copies the text out of + * an existing StringCharacterIterator and resets the beginning and + * ending index. + * + * @param sci The StringCharacterIterator to copy the info from + * @param begin The beginning index of the range we are interested in. + * @param end The ending index of the range we are interested in. + */ + StringCharacterIterator (StringCharacterIterator sci, int begin, int end) + { + this (sci.text, begin, end, begin); + } + + /** + * This method returns the character at the current index position + * + * @return The character at the current index position. + */ + public char current () + { + return (index < end) ? text.charAt (index) : DONE; + } + + /*************************************************************************/ + + /** + * This method increments the current index and then returns the + * character at the new index value. If the index is already at + * getEndIndex () - 1, it will not be incremented. + * + * @return The character at the position of the incremented index + * value, or DONE if the index has reached + * getEndIndex () - 1. + */ + public char next () + { + if (index == end) + return DONE; + + ++index; + return current (); + } + + /*************************************************************************/ + + /** + * This method decrements the current index and then returns the + * character at the new index value. If the index value is already + * at the beginning index, it will not be decremented. + * + * @return The character at the position of the decremented index + * value, or DONE if index was already equal to the + * beginning index value. + */ + public char previous () + { + if (index == begin) + return DONE; + + --index; + return current (); + } + + /*************************************************************************/ + + /** + * This method sets the index value to the beginning of the range and returns + * the character there. + * + * @return The character at the beginning of the range, or + * DONE if the range is empty. + */ + public char first () + { + index = begin; + return current (); + } + + /*************************************************************************/ + + /** + * This method sets the index value to getEndIndex () - 1 and + * returns the character there. If the range is empty, then the index value + * will be set equal to the beginning index. + * + * @return The character at the end of the range, or + * DONE if the range is empty. + */ + public char last () + { + if (end == begin) + return DONE; + + index = end - 1; + return current (); + } + + /*************************************************************************/ + + /** + * This method returns the current value of the index. + * + * @return The current index value + */ + public int getIndex () + { + return index; + } + + /*************************************************************************/ + + /** + * This method sets the value of the index to the specified value, then + * returns the character at that position. + * + * @param index The new index value. + * + * @return The character at the new index value or DONE + * if the index value is equal to getEndIndex. + * + * @exception IllegalArgumentException If the specified index is not valid + */ + public char setIndex (int index) + { + if ((index < begin) || (index > end)) + throw new IllegalArgumentException ("Bad index specified"); + + this.index = index; + return current (); + } + + /*************************************************************************/ + + /** + * This method returns the character position of the first character in the + * range. + * + * @return The index of the first character in the range. + */ + public int getBeginIndex () + { + return begin; + } + + /*************************************************************************/ + + /** + * This method returns the character position of the end of the text range. + * This will actually be the index of the first character following the + * end of the range. In the event the text range is empty, this will be + * equal to the first character in the range. + * + * @return The index of the end of the range. + */ + public int getEndIndex () + { + return end; + } + + /*************************************************************************/ + + /** + * This method creates a copy of this CharacterIterator. + * + * @return A copy of this CharacterIterator. + */ + public Object clone () + { + return new StringCharacterIterator (text, begin, end, index); + } + + /*************************************************************************/ + + /** + * This method tests this object for equality againt the specified + * object. This will be true if and only if the specified object: + *

+ *

+ * + * @param obj The object to test for equality against. + * + * @return true if the specified object is equal to this + * object, false otherwise. + */ + public boolean equals (Object obj) + { + if (! (obj instanceof StringCharacterIterator)) + return false; + + StringCharacterIterator sci = (StringCharacterIterator) obj; + + return (begin == sci.begin + && end == sci.end + && index == sci.index + && text.equals (sci.text)); + } + + /** + * Return the hash code for this object. + * @return the hash code + */ + public int hashCode() + { + // Incorporate all the data in a goofy way. + return begin ^ end ^ index ^ text.hashCode(); + } + + /*************************************************************************/ + + /** + * This method allows other classes in java.text to change the value + * of the underlying text being iterated through. + * + * @param text The new String to iterate through. + */ + public void setText (String text) + { + this.text = text; + this.begin = 0; + this.end = text.length (); + this.index = 0; + } +} -- cgit v1.2.3