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Updated to use ApplesoftTokenizer.

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Robert Greene 2003-05-28 03:43:35 +00:00
parent 09e6bf289b
commit 5799f4c0ea
1 changed files with 18 additions and 62 deletions
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80
src/com/webcodepro/applecommander/storage/ApplesoftFileFilter.java
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@ -27,41 +27,10 @@ import java.io.PrintWriter;
/** /**
* Filter the given file as an Applesoft file. * Filter the given file as an Applesoft file.
* <p> * <p>
* Applesoft memory format:<br>
* [Line]<br>
* ...
* [Line]<br>
* <br>
* where <Line> is:<br>
* [Next addr - $0000 is end of program] (word)<br>
* [Line no] (word)<br>
* [Tokens and/or characters]<br>
* [End-of-line marker: $00 bytes]
* <p>
* Date created: Nov 2, 2002 10:04:10 PM * Date created: Nov 2, 2002 10:04:10 PM
* @author: Rob Greene * @author: Rob Greene
*/ */
public class ApplesoftFileFilter implements FileFilter { public class ApplesoftFileFilter implements FileFilter {
private static String tokens[] = { // starts at $80
" END ", " FOR ", " NEXT ", " DATA ", " INPUT ", " DEL ",
" DIM ", " READ ", " GR ", " TEXT ", " PR# ", " IN# ",
" CALL ", " PLOT ", " HLIN ", " VLIN ", " HGR2 ", " HGR ",
" HCOLOR= ", " HPLOT ", " DRAW ", " XDRAW ", " HTAB ", " HOME ",
" ROT= ", " SCALE= ", " SHLOAD ", " TRACE ", " NOTRACE ", " NORMAL ",
" INVERSE ", " FLASH ", " COLOR= ", " POP ", " VTAB ", " HIMEM: ",
" LOMEM: ", " ONERR ", " RESUME ", " RECALL ", " STORE ", " SPEED= ",
" LET ", " GOTO ", " RUN ", " IF ", " RESTORE ", " & ",
" GOSUB ", " RETURN ", " REM ", " STOP ", " ON ", " WAIT ",
" LOAD ", " SAVE ", " DEF ", " POKE ", " PRINT ", " CONT ",
" LIST ", " CLEAR ", " GET ", " NEW ", " TAB( ", " TO ",
" FN ", " SPC( ", " THEN ", " AT ", " NOT ", " STEP ",
" +", " -", " *", "/", " ^", " AND ",
" OR ", " >", " =", " <", " SGN", " INT",
" ABS", " USR", " FRE", " SCRN( ", " PDL", " POS",
" SQR", " RND", " LOG", " EXP", " COS", " SIN",
" TAN", " ATN", " PEEK", " LEN", " STR$", " VAL",
" ASC", " CHR$", " LEFT$", " RIGHT$", " MID$ " };
/** /**
* Constructor for ApplesoftFileFilter. * Constructor for ApplesoftFileFilter.
*/ */
@ -74,42 +43,29 @@ public class ApplesoftFileFilter implements FileFilter {
* @see com.webcodepro.applecommander.storage.FileFilter#filter(FileEntry) * @see com.webcodepro.applecommander.storage.FileFilter#filter(FileEntry)
*/ */
public byte[] filter(FileEntry fileEntry) { public byte[] filter(FileEntry fileEntry) {
byte[] fileData = fileEntry.getFileData(); ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
int offset = 0;
ByteArrayOutputStream byteArray = new ByteArrayOutputStream(fileData.length * 2);
PrintWriter printWriter = new PrintWriter(byteArray, true); PrintWriter printWriter = new PrintWriter(byteArray, true);
while (offset < fileData.length) { ApplesoftTokenizer tokenizer = new ApplesoftTokenizer(fileEntry);
int nextAddress = AppleUtil.getWordValue(fileData, offset); boolean firstLine = true;
if (nextAddress == 0) break; // next address of 0 indicates end of program while (tokenizer.hasMoreTokens()) {
offset+= 2; ApplesoftToken token = tokenizer.getNextToken();
int lineNumber = AppleUtil.getWordValue(fileData, offset); if (token == null) {
offset+= 2; break;
printWriter.print(lineNumber); } else if (token.isLineNumber()) {
printWriter.print(' '); if (firstLine) {
while (fileData[offset] != 0) { firstLine = false;
byte byt = fileData[offset++];
if ((byt & 0x80) != 0) {
int token = AppleUtil.getUnsignedByte(byt) - 0x80;
if (token >= tokens.length) {
printWriter.print("<UNKNOWN TOKEN>");
} else {
String tokenString = tokens[token];
printWriter.print(tokenString);
}
} else { } else {
char ch = (char)byt; printWriter.println();
if (ch < 0x20) {
printWriter.print("<CTRL-");
printWriter.print((char)('@' + ch));
printWriter.print(">");
} else {
printWriter.print(ch);
}
} }
printWriter.print(token.getLineNumber());
printWriter.print(" ");
} else if (token.isToken()) {
printWriter.print(token.getTokenString());
} else {
printWriter.print(token.getStringValue());
} }
printWriter.println();
offset++; // skip to next line
} }
printWriter.close();
return byteArray.toByteArray(); return byteArray.toByteArray();
} }