mirror of
https://github.com/peterdell/wudsn-ide.git
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128 lines
4.3 KiB
Java
128 lines
4.3 KiB
Java
/**
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* Copyright (C) 2009 - 2021 <a href="https://www.wudsn.com" target="_top">Peter Dell</a>
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*
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* This file is part of WUDSN IDE.
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*
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* WUDSN IDE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* WUDSN IDE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with WUDSN IDE. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.wudsn.ide.hex.parser;
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import org.eclipse.jface.viewers.StyledString;
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import com.wudsn.ide.hex.Texts;
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import com.wudsn.ide.hex.HexEditorContentOutlineTreeObject;
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import com.wudsn.ide.hex.HexEditorParser;
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public abstract class AtariParser extends HexEditorParser {
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public final static int COM_HEADER = 0xffff;
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protected final boolean parseAtariCOMFile(StyledString contentBuilder, long offset, int fileContentLength) {
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if (contentBuilder == null) {
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throw new IllegalArgumentException("Parameter 'contentBuilder' must not be null.");
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}
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boolean error;
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int startAddress;
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int endAddress;
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int blockCount;
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long blockEnd;
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// Skip offset bytes in lookup array.
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skipByteTextIndex(offset);
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HexEditorContentOutlineTreeObject treeObject;
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error = (fileContentLength - offset) < 7;
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if (!error) {
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startAddress = fileContent.getWord(offset + 2);
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endAddress = fileContent.getWord(offset + 4);
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blockCount = 1;
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blockEnd = offset + endAddress - startAddress + 6;
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treeObject = printBlockHeader(contentBuilder, Texts.HEX_EDITOR_ATARI_COM_BLOCK_HEADER, blockCount,
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Texts.HEX_EDITOR_ATARI_COM_BLOCK_HEADER_PARAMETERS, offset, startAddress, endAddress);
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offset = printBytes(treeObject, contentBuilder, offset, offset + 5, true, 0);
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boolean blockMode;
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blockMode = true;
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error = blockEnd >= fileContentLength;
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try {
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while (blockMode && !error) {
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offset = printBytes(treeObject, contentBuilder, offset, blockEnd, true, startAddress);
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int headerLength = -1;
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// No more bytes left?
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if (offset == fileContentLength) {
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blockMode = false;
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} else
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// At least 5 bytes available? (4 header bytes and 1 data
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// byte)
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if (fileContentLength - offset < 5) {
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error = true;
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} else {
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boolean comHeader;
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comHeader = fileContent.getWord(offset) == COM_HEADER;
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if (comHeader) {
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// At least 7 bytes available? (6 header bytes and 1
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// data byte)
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if (fileContentLength - offset < 7) {
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error = true;
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} else {
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// Inner COM header found
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headerLength = 6;
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startAddress = fileContent.getByte(offset + 2) + 256 * fileContent.getByte(offset + 3);
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endAddress = fileContent.getByte(offset + 4) + 256 * fileContent.getByte(offset + 5);
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}
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} else {
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// No inner COM header found
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headerLength = 4;
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startAddress = fileContent.getByte(offset + 0) + 256 * fileContent.getByte(offset + 1);
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endAddress = fileContent.getByte(offset + 2) + 256 * fileContent.getByte(offset + 3);
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}
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error = endAddress < startAddress;
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}
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if (blockMode) {
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contentBuilder.append("\n");
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}
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if (blockMode && !error) {
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blockCount++;
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blockEnd = offset + endAddress - startAddress + headerLength;
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if (blockEnd < fileContentLength) {
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treeObject = printBlockHeader(contentBuilder, Texts.HEX_EDITOR_ATARI_COM_BLOCK_HEADER,
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blockCount, Texts.HEX_EDITOR_ATARI_COM_BLOCK_HEADER_PARAMETERS, offset,
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startAddress, endAddress);
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offset = printBytes(treeObject, contentBuilder, offset, offset + headerLength - 1, true, 0);
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} else {
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error = true;
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}
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}
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}
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} catch (RuntimeException ex) {
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contentBuilder.append(ex.toString());
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error = true;
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}
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}
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if (error) {
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printBlockWithError(contentBuilder, Texts.HEX_EDITOR_ATARI_COM_BLOCK_ERROR, fileContentLength, offset);
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}
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return error;
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}
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}
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