112 lines
3.4 KiB
Java
112 lines
3.4 KiB
Java
/*
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* AppleCommander - An Apple ][ image utility.
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* Copyright (C) 2002-2022 by Robert Greene
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* robgreene at users.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package com.webcodepro.applecommander.storage.filters;
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import java.io.ByteArrayOutputStream;
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import java.io.PrintWriter;
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import com.webcodepro.applecommander.storage.FileEntry;
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import com.webcodepro.applecommander.storage.FileFilter;
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/**
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* Filter the given file data for text.
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* <p>
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* @author Rob Greene
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*/
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public class AssemblySourceFileFilter implements FileFilter {
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private int[] tabStops = new int[] { 10, 15 };
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private int commentTabStop = 25;
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private String tabChars = "\t "; //$NON-NLS-1$
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private String commentTabChars = ";"; //$NON-NLS-1$
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private String commentNoTabChars = "*"; //$NON-NLS-1$
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/**
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* Process the given FileEntry and return a byte array
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* with formatted assembly data; use PrintWriter to get platform
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* agnostic line endings.
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*/
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public byte[] filter(FileEntry fileEntry) {
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byte[] fileData = fileEntry.getFileData();
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int offset = 0;
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ByteArrayOutputStream byteArray = new
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ByteArrayOutputStream(fileData.length);
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PrintWriter printWriter = new PrintWriter(byteArray, true);
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int tabPosition = 0;
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int charPosition = 0;
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boolean noMoreTabs = false;
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while (offset < fileData.length) {
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char c = (char)(fileData[offset] & 0x7f);
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if (c != 0) {
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// Apple line end
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if (c == 0x0d) {
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printWriter.println();
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tabPosition = 0;
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charPosition = 0;
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noMoreTabs = false;
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// Tab character
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} else if (!noMoreTabs && tabChars.indexOf(c) > -1) {
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if (tabPosition < tabStops.length) {
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int desiredPosition = tabStops[tabPosition];
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// Always need one space...
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printWriter.print(' ');
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charPosition++;
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// Do we need more?
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while (charPosition < desiredPosition) {
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printWriter.print(' ');
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charPosition++;
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}
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}
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// EOL comment
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} else if (!noMoreTabs && commentTabChars.indexOf(c) > -1) {
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while (charPosition < commentTabStop) {
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printWriter.print(' ');
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charPosition++;
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}
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printWriter.print(c);
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charPosition++;
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// BOL comment
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} else if (charPosition == 0 && commentNoTabChars.indexOf(c) > -1) {
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noMoreTabs = true;
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printWriter.print(c);
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charPosition++;
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// Actual source code!
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} else {
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printWriter.print(c);
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charPosition++;
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}
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}
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offset++;
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}
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return byteArray.toByteArray();
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}
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/**
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* Give suggested file name.
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*/
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public String getSuggestedFileName(FileEntry fileEntry) {
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String fileName = fileEntry.getFilename().trim();
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if (!fileName.toLowerCase().endsWith(".s")) { //$NON-NLS-1$
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fileName += ".s"; //$NON-NLS-1$
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}
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return fileName;
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}
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}
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