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-rw-r--r--src/proguard/WordReader.java387
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diff --git a/src/proguard/WordReader.java b/src/proguard/WordReader.java
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--- a/src/proguard/WordReader.java
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-/*
- * ProGuard -- shrinking, optimization, obfuscation, and preverification
- * of Java bytecode.
- *
- * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
- *
- * This program 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 of the License, or (at your option)
- * any later version.
- *
- * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-package proguard;
-
-import java.io.*;
-
-
-/**
- * An abstract reader of words, with the possibility to include other readers.
- * Words are separated by spaces or broken off at delimiters. Words containing
- * spaces or delimiters can be quoted with single or double quotes.
- * Comments (everything starting with '#' on a single line) are ignored.
- *
- * @author Eric Lafortune
- * @noinspection TailRecursion
- */
-public abstract class WordReader
-{
- private static final char COMMENT_CHARACTER = '#';
-
-
- private File baseDir;
- private WordReader includeWordReader;
- private String currentLine;
- private int currentLineLength;
- private int currentIndex;
- private String currentWord;
- private String currentComments;
-
-
- /**
- * Creates a new WordReader with the given base directory.
- */
- protected WordReader(File baseDir)
- {
- this.baseDir = baseDir;
- }
-
-
- /**
- * Sets the base directory of this reader.
- */
- public void setBaseDir(File baseDir)
- {
- if (includeWordReader != null)
- {
- includeWordReader.setBaseDir(baseDir);
- }
- else
- {
- this.baseDir = baseDir;
- }
- }
-
-
- /**
- * Returns the base directory of this reader, if any.
- */
- public File getBaseDir()
- {
- return includeWordReader != null ?
- includeWordReader.getBaseDir() :
- baseDir;
- }
-
-
- /**
- * Specifies to start reading words from the given WordReader. When it is
- * exhausted, this WordReader will continue to provide its own words.
- *
- * @param newIncludeWordReader the WordReader that will start reading words.
- */
- public void includeWordReader(WordReader newIncludeWordReader)
- {
- if (includeWordReader == null)
- {
- includeWordReader = newIncludeWordReader;
- }
- else
- {
- includeWordReader.includeWordReader(newIncludeWordReader);
- }
- }
-
-
- /**
- * Reads a word from this WordReader, or from one of its active included
- * WordReader objects.
- *
- * @param isFileName return a complete line (or argument), if the word
- * isn't an option (it doesn't start with '-').
- * @return the read word.
- */
- public String nextWord(boolean isFileName) throws IOException
- {
- currentWord = null;
-
- // See if we have an included reader to produce a word.
- if (includeWordReader != null)
- {
- // Does the included word reader still produce a word?
- currentWord = includeWordReader.nextWord(isFileName);
- if (currentWord != null)
- {
- // Return it if so.
- return currentWord;
- }
-
- // Otherwise close and ditch the word reader.
- includeWordReader.close();
- includeWordReader = null;
- }
-
- // Get a word from this reader.
-
- // Skip any whitespace and comments left on the current line.
- if (currentLine != null)
- {
- // Skip any leading whitespace.
- while (currentIndex < currentLineLength &&
- Character.isWhitespace(currentLine.charAt(currentIndex)))
- {
- currentIndex++;
- }
-
- // Skip any comments.
- if (currentIndex < currentLineLength &&
- isComment(currentLine.charAt(currentIndex)))
- {
- currentIndex = currentLineLength;
- }
- }
-
- // Make sure we have a non-blank line.
- while (currentLine == null || currentIndex == currentLineLength)
- {
- currentLine = nextLine();
- if (currentLine == null)
- {
- return null;
- }
-
- currentLineLength = currentLine.length();
-
- // Skip any leading whitespace.
- currentIndex = 0;
- while (currentIndex < currentLineLength &&
- Character.isWhitespace(currentLine.charAt(currentIndex)))
- {
- currentIndex++;
- }
-
- // Remember any leading comments.
- if (currentIndex < currentLineLength &&
- isComment(currentLine.charAt(currentIndex)))
- {
- // Remember the comments.
- String comment = currentLine.substring(currentIndex + 1);
- currentComments = currentComments == null ?
- comment :
- currentComments + '\n' + comment;
-
- // Skip the comments.
- currentIndex = currentLineLength;
- }
- }
-
- // Find the word starting at the current index.
- int startIndex = currentIndex;
- int endIndex;
-
- char startChar = currentLine.charAt(startIndex);
-
- if (isQuote(startChar))
- {
- // The next word is starting with a quote character.
- // Skip the opening quote.
- startIndex++;
-
- // The next word is a quoted character string.
- // Find the closing quote.
- do
- {
- currentIndex++;
-
- if (currentIndex == currentLineLength)
- {
- currentWord = currentLine.substring(startIndex-1, currentIndex);
- throw new IOException("Missing closing quote for "+locationDescription());
- }
- }
- while (currentLine.charAt(currentIndex) != startChar);
-
- endIndex = currentIndex++;
- }
- else if (isFileName &&
- !isOption(startChar))
- {
- // The next word is a (possibly optional) file name.
- // Find the end of the line, the first path separator, the first
- // option, or the first comment.
- while (currentIndex < currentLineLength)
- {
- char currentCharacter = currentLine.charAt(currentIndex);
- if (isFileDelimiter(currentCharacter) ||
- ((isOption(currentCharacter) ||
- isComment(currentCharacter)) &&
- Character.isWhitespace(currentLine.charAt(currentIndex-1)))) {
- break;
- }
-
- currentIndex++;
- }
-
- endIndex = currentIndex;
-
- // Trim any trailing whitespace.
- while (endIndex > startIndex &&
- Character.isWhitespace(currentLine.charAt(endIndex-1)))
- {
- endIndex--;
- }
- }
- else if (isDelimiter(startChar))
- {
- // The next word is a single delimiting character.
- endIndex = ++currentIndex;
- }
- else
- {
- // The next word is a simple character string.
- // Find the end of the line, the first delimiter, or the first
- // white space.
- while (currentIndex < currentLineLength)
- {
- char currentCharacter = currentLine.charAt(currentIndex);
- if (isDelimiter(currentCharacter) ||
- Character.isWhitespace(currentCharacter) ||
- isComment(currentCharacter)) {
- break;
- }
-
- currentIndex++;
- }
-
- endIndex = currentIndex;
- }
-
- // Remember and return the parsed word.
- currentWord = currentLine.substring(startIndex, endIndex);
-
- return currentWord;
- }
-
-
- /**
- * Returns the comments collected before returning the last word.
- * Starts collecting new comments.
- *
- * @return the collected comments, or <code>null</code> if there weren't any.
- */
- public String lastComments() throws IOException
- {
- if (includeWordReader == null)
- {
- String comments = currentComments;
- currentComments = null;
- return comments;
- }
- else
- {
- return includeWordReader.lastComments();
- }
- }
-
-
- /**
- * Constructs a readable description of the current position in this
- * WordReader and its included WordReader objects.
- *
- * @return the description.
- */
- public String locationDescription()
- {
- return
- (includeWordReader == null ?
- (currentWord == null ?
- "end of " :
- "'" + currentWord + "' in " ) :
- (includeWordReader.locationDescription() + ",\n" +
- " included from ")) +
- lineLocationDescription();
- }
-
-
- /**
- * Reads a line from this WordReader, or from one of its active included
- * WordReader objects.
- *
- * @return the read line.
- */
- protected abstract String nextLine() throws IOException;
-
-
- /**
- * Returns a readable description of the current WordReader position.
- *
- * @return the description.
- */
- protected abstract String lineLocationDescription();
-
-
- /**
- * Closes the FileWordReader.
- */
- public void close() throws IOException
- {
- // Close and ditch the included word reader, if any.
- if (includeWordReader != null)
- {
- includeWordReader.close();
- includeWordReader = null;
- }
- }
-
-
- // Small utility methods.
-
- private boolean isOption(char character)
- {
- return character == '-';
- }
-
-
- private boolean isComment(char character)
- {
- return character == COMMENT_CHARACTER;
- }
-
-
- private boolean isDelimiter(char character)
- {
- return character == '@' ||
- character == '{' ||
- character == '}' ||
- character == '(' ||
- character == ')' ||
- character == ',' ||
- character == ';' ||
- character == File.pathSeparatorChar;
- }
-
-
- private boolean isFileDelimiter(char character)
- {
- return character == '(' ||
- character == ')' ||
- character == ',' ||
- character == ';' ||
- character == File.pathSeparatorChar;
- }
-
-
- private boolean isQuote(char character)
- {
- return character == '\'' ||
- character == '"';
- }
-}
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