mirror of
https://github.com/dmolony/DiskBrowser.git
synced 2024-06-20 20:29:29 +00:00
471 lines
15 KiB
Java
471 lines
15 KiB
Java
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package com.bytezone.diskbrowser.applefile;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import com.bytezone.diskbrowser.utilities.Utility;
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// -----------------------------------------------------------------------------------//
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public class SubLine
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// -----------------------------------------------------------------------------------//
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{
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SourceLine parent;
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ApplesoftBasicProgram program;
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int startPtr;
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int length;
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String[] nextVariables;
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String forVariable = "";
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String onExpression = "";
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int assignEqualPos; // used for aligning the equals sign
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byte[] buffer;
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private final Map<Integer, List<Integer>> gotoLines;
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private final Map<Integer, List<Integer>> gosubLines;
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private final Map<String, List<Integer>> symbolLines;
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private final Map<String, List<String>> uniqueSymbols;
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// ---------------------------------------------------------------------------------//
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SubLine (SourceLine parent, int startPtr, int length)
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// ---------------------------------------------------------------------------------//
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{
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this.parent = parent;
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this.startPtr = startPtr;
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this.length = length;
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program = parent.parent;
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this.gotoLines = program.gotoLines;
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this.gosubLines = program.gosubLines;
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this.symbolLines = program.symbolLines;
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this.uniqueSymbols = program.uniqueSymbols;
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this.buffer = parent.buffer;
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byte firstByte = parent.buffer[startPtr];
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if (Utility.isHighBitSet (firstByte))
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doToken (firstByte);
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else if (Utility.isDigit (firstByte))
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doDigit ();
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else
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doAlpha ();
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if (is (ApplesoftConstants.TOKEN_REM) || is (ApplesoftConstants.TOKEN_DATA))
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return;
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int ptr = startPtr;
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length--;
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String var = "";
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boolean inQuote = false;
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while (length-- > 0)
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{
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byte b = parent.buffer[ptr++];
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if (inQuote && b != Utility.ASCII_QUOTE)
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continue;
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if (Utility.isPossibleVariable (b))
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var += (char) b;
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else
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{
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checkVar (var, b);
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var = "";
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if (b == Utility.ASCII_QUOTE)
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inQuote = !inQuote;
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}
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}
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checkVar (var, (byte) 0);
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}
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// ---------------------------------------------------------------------------------//
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private void checkVar (String var, byte term)
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// ---------------------------------------------------------------------------------//
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{
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if (var.length () == 0)
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return;
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if (term == Utility.ASCII_LEFT_BRACKET)
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var += "(";
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if (Utility.isLetter ((byte) var.charAt (0)))
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{
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List<Integer> lines = symbolLines.get (var);
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if (lines == null)
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{
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lines = new ArrayList<> ();
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symbolLines.put (var, lines);
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}
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if (lines.size () == 0)
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lines.add (parent.lineNumber);
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else
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{
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int lastLine = lines.get (lines.size () - 1);
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if (lastLine != parent.lineNumber)
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lines.add (parent.lineNumber);
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}
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checkUniqueName (var);
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}
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}
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// ---------------------------------------------------------------------------------//
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private void doToken (byte b)
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// ---------------------------------------------------------------------------------//
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{
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switch (b)
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{
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case ApplesoftConstants.TOKEN_FOR:
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int p = startPtr + 1;
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while (parent.buffer[p] != ApplesoftConstants.TOKEN_EQUALS)
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forVariable += (char) parent.buffer[p++];
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break;
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case ApplesoftConstants.TOKEN_NEXT:
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if (length == 2) // no variables
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nextVariables = new String[0];
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else
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{
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String varList = new String (parent.buffer, startPtr + 1, length - 2);
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nextVariables = varList.split (",");
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}
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break;
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case ApplesoftConstants.TOKEN_LET:
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recordEqualsPosition ();
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break;
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case ApplesoftConstants.TOKEN_GOTO:
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int targetLine = getLineNumber (parent.buffer, startPtr + 1);
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addXref (targetLine, gotoLines);
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break;
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case ApplesoftConstants.TOKEN_GOSUB:
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targetLine = getLineNumber (parent.buffer, startPtr + 1);
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addXref (targetLine, gosubLines);
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break;
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case ApplesoftConstants.TOKEN_ON:
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p = startPtr + 1;
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int max = startPtr + length - 1;
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while (p < max && parent.buffer[p] != ApplesoftConstants.TOKEN_GOTO
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&& parent.buffer[p] != ApplesoftConstants.TOKEN_GOSUB)
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{
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if (Utility.isHighBitSet (parent.buffer[p]))
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{
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int val = parent.buffer[p] & 0x7F;
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if (val < ApplesoftConstants.tokens.length)
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onExpression += " " + ApplesoftConstants.tokens[val];
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}
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else
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onExpression += (char) (parent.buffer[p]);
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p++;
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}
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switch (parent.buffer[p++])
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{
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case ApplesoftConstants.TOKEN_GOSUB:
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for (int destLine : getLineNumbers (parent.buffer, p))
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addXref (destLine, gosubLines);
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break;
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case ApplesoftConstants.TOKEN_GOTO:
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for (int destLine : getLineNumbers (parent.buffer, p))
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addXref (destLine, gotoLines);
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break;
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default:
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System.out.println ("GOTO / GOSUB not found");
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}
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break;
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}
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}
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// ---------------------------------------------------------------------------------//
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private void checkUniqueName (String symbol)
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// ---------------------------------------------------------------------------------//
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{
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int ptr = symbol.length () - 1;
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if (symbol.charAt (ptr) == Utility.ASCII_LEFT_BRACKET) // array
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ptr--;
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if (symbol.charAt (ptr) == Utility.ASCII_DOLLAR
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|| symbol.charAt (ptr) == Utility.ASCII_PERCENT)
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ptr--;
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String unique =
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(ptr <= 1) ? symbol : symbol.substring (0, 2) + symbol.substring (ptr + 1);
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List<String> usage = uniqueSymbols.get (unique);
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if (usage == null)
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{
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usage = new ArrayList<> ();
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uniqueSymbols.put (unique, usage);
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}
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if (!usage.contains (symbol))
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usage.add (symbol);
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}
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// ---------------------------------------------------------------------------------//
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private void doDigit ()
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// ---------------------------------------------------------------------------------//
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{
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int targetLine = getLineNumber (parent.buffer, startPtr);
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addXref (targetLine, gotoLines);
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}
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// ---------------------------------------------------------------------------------//
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private void doAlpha ()
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// ---------------------------------------------------------------------------------//
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{
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recordEqualsPosition ();
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}
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// ---------------------------------------------------------------------------------//
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private List<Integer> getLineNumbers (byte[] buffer, int ptr)
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// ---------------------------------------------------------------------------------//
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{
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List<Integer> lineNumbers = new ArrayList<> ();
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int start = ptr;
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while (ptr < buffer.length && buffer[ptr] != 0 && buffer[ptr] != Utility.ASCII_COLON)
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ptr++;
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String s = new String (buffer, start, ptr - start);
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String[] chunks = s.split (",");
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try
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{
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for (String chunk : chunks)
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lineNumbers.add (Integer.parseInt (chunk));
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}
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catch (NumberFormatException e)
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{
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System.out.printf ("NFE: %s%n", s);
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}
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return lineNumbers;
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}
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// ---------------------------------------------------------------------------------//
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private int getLineNumber (byte[] buffer, int ptr)
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// ---------------------------------------------------------------------------------//
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{
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int lineNumber = 0;
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while (ptr < buffer.length)
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{
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int b = (buffer[ptr++] & 0xFF) - 0x30;
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if (b < 0 || b > 9)
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break;
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lineNumber = lineNumber * 10 + b;
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}
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return lineNumber;
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}
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// ---------------------------------------------------------------------------------//
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private void addXref (int targetLine, Map<Integer, List<Integer>> map)
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// ---------------------------------------------------------------------------------//
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{
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List<Integer> lines = map.get (targetLine);
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if (lines == null)
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{
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lines = new ArrayList<> ();
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map.put (targetLine, lines);
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}
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lines.add (parent.lineNumber);
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}
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// ---------------------------------------------------------------------------------//
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boolean isImpliedGoto ()
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// ---------------------------------------------------------------------------------//
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{
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byte b = parent.buffer[startPtr];
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if (Utility.isHighBitSet (b))
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return false;
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return (Utility.isDigit (b));
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}
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// Record the position of the equals sign so it can be aligned with adjacent lines.
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// ---------------------------------------------------------------------------------//
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private void recordEqualsPosition ()
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// ---------------------------------------------------------------------------------//
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{
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int p = startPtr + 1;
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int max = startPtr + length;
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while (parent.buffer[p] != ApplesoftConstants.TOKEN_EQUALS && p < max)
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p++;
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if (buffer[p] == ApplesoftConstants.TOKEN_EQUALS)
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assignEqualPos = toString ().indexOf ('='); // use expanded line
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}
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// ---------------------------------------------------------------------------------//
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boolean isJoinableRem ()
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// ---------------------------------------------------------------------------------//
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{
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return is (ApplesoftConstants.TOKEN_REM) && !isFirst ();
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}
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// ---------------------------------------------------------------------------------//
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boolean isFirst ()
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// ---------------------------------------------------------------------------------//
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{
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return (parent.linePtr + 4) == startPtr;
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}
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// ---------------------------------------------------------------------------------//
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boolean is (byte token)
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// ---------------------------------------------------------------------------------//
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{
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return parent.buffer[startPtr] == token;
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}
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// ---------------------------------------------------------------------------------//
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boolean has (byte token)
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// ---------------------------------------------------------------------------------//
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{
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int ptr = startPtr + 1;
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int max = startPtr + length;
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while (ptr < max)
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{
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if (parent.buffer[ptr++] == token)
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return true;
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}
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return false;
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}
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// ---------------------------------------------------------------------------------//
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boolean isEmpty ()
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// ---------------------------------------------------------------------------------//
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{
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return length == 1 && buffer[startPtr] == 0;
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}
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// ---------------------------------------------------------------------------------//
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boolean containsToken ()
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// ---------------------------------------------------------------------------------//
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{
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// ignore first byte, check the rest for tokens
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for (int p = startPtr + 1, max = startPtr + length; p < max; p++)
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if (Utility.isHighBitSet (buffer[p]))
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return true;
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return false;
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}
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// ---------------------------------------------------------------------------------//
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boolean containsControlChars ()
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// ---------------------------------------------------------------------------------//
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{
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for (int p = startPtr + 1, max = startPtr + length; p < max; p++)
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{
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int c = buffer[p] & 0xFF;
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if (c == 0)
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break;
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if (c < 32)
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return true;
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}
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return false;
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}
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// ---------------------------------------------------------------------------------//
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void addFormattedRem (StringBuilder text)
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// ---------------------------------------------------------------------------------//
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{
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int ptr = startPtr + 1;
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int max = startPtr + length - 2;
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while (ptr <= max)
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{
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int c = buffer[ptr] & 0xFF;
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// System.out.printf ("%02X %s%n", c, (char) c);
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if (c == 0x08 && text.length () > 0)
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text.deleteCharAt (text.length () - 1);
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else if (c == 0x0D)
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text.append ("\n");
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else
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text.append ((char) c);
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ptr++;
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}
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}
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// ---------------------------------------------------------------------------------//
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public int getAddress ()
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// ---------------------------------------------------------------------------------//
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{
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return program.getLoadAddress () + startPtr;
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}
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// ---------------------------------------------------------------------------------//
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public String getAlignedText (int alignPosition)
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// ---------------------------------------------------------------------------------//
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{
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StringBuilder line = toStringBuilder ();
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while (alignPosition-- > assignEqualPos)
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line.insert (assignEqualPos, ' ');
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return line.toString ();
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}
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// A REM statement might conceal an assembler routine
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// ---------------------------------------------------------------------------------//
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public String[] getAssembler ()
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// ---------------------------------------------------------------------------------//
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{
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byte[] buffer2 = new byte[length - 1];
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System.arraycopy (buffer, startPtr + 1, buffer2, 0, buffer2.length);
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AssemblerProgram program =
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new AssemblerProgram ("REM assembler", buffer2, getAddress () + 1);
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return program.getAssembler ().split ("\n");
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public String toString ()
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// ---------------------------------------------------------------------------------//
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{
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return toStringBuilder ().toString ();
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}
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// ---------------------------------------------------------------------------------//
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public StringBuilder toStringBuilder ()
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// ---------------------------------------------------------------------------------//
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{
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StringBuilder line = new StringBuilder ();
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// All sublines end with 0 or : except IF lines that are split into two
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int max = startPtr + length - 1;
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if (buffer[max] == 0)
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--max;
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if (isImpliedGoto () && !ApplesoftBasicProgram.basicPreferences.showThen)
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line.append ("GOTO ");
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for (int p = startPtr; p <= max; p++)
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{
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byte b = buffer[p];
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if (Utility.isHighBitSet (b))
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{
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if (line.length () > 0 && line.charAt (line.length () - 1) != ' ')
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line.append (' ');
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int val = b & 0x7F;
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if (val < ApplesoftConstants.tokens.length)
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{
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if (b != ApplesoftConstants.TOKEN_THEN
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|| ApplesoftBasicProgram.basicPreferences.showThen)
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line.append (ApplesoftConstants.tokens[val]);
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}
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}
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else if (Utility.isControlCharacter (b))
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line.append (ApplesoftBasicProgram.basicPreferences.showCaret
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? "^" + (char) (b + 64) : "");
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else
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line.append ((char) b);
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}
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return line;
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}
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}
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