John B Matthews revision to the Integer BASIC filter.
This commit is contained in:
Robert Greene
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9d41ed1fd8
commit
6910ae0f45
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@ -35,34 +35,36 @@ import com.webcodepro.applecommander.util.AppleUtil;
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* [byte] length of line<br>
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* [word] line number<br>
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* [byte]* line data<br>
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* $01 end of line<br>
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* $01 is end of line<br>
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* Repeat until end of program (line length of 0).
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* <p>
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* Tokens are $00 - $7F, some are duplicated.<br>
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* $01 = end of line.<br>
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* $01 is end of line.<br>
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* $B0 - $B9 = signifies a number stored in a word.<br>
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* <p>
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* Date created: Nov 3, 2002 1:14:47 AM
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* @author Rob Greene
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* Revised filter: Aug 8, 2004 12:45 PM
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* @author John B. Matthews
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*/
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public class IntegerBasicFileFilter implements FileFilter {
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private static String[] tokens = {
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null, null, null, ": ", "LOAD ", "SAVE ", null, "RUN ", // $00-$07 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
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null, "DEL ", ", ", "NEW ", "CLR ", "AUTO ", null, "MAN ", // $08-$0F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$
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"HIMEM: ", "LOMEM: ", "+", "-", "*", "/", "=", "#", // $10-$17 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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">=", ">", "<=", "<>", "<", " AND ", " OR ", " MOD ",// $18-$1F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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"^", null, "(", ",", " THEN ", " THEN ", ",", ",", // $20-$27 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$
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"\"", "\"", "(", null, null, "(", " PEEK ", "RND ", // $28-$2F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$
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"SGN ", "ABS ", "PDL ", null, "(", "+", "-", "NOT ", // $30-$37 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$
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"(", "=", "#", " LEN(", " ASC(", " SCRN(", ",", " (", // $38-$3F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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"$", null, "(", ",", ",", ";", ";", ";", // $40-$47 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$
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",", ",", ",", "TEXT ", "GR ", "CALL ", "DIM ", "DIM ", // $48-$4F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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"TAB ", "END ", "INPUT ", "INPUT ", "INPUT ", "FOR ", "=", " TO ", // $50-$57 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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" STEP ", "NEXT ", ",", "RETURN ", "GOSUB ", "REM ", "LET ", "GOTO ",// $58-$5F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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"IF ", "PRINT ", "PRINT ", "PRINT ", " POKE ", ",", "COLOR= ", "PLOT ",// $60-$67 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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",", "HLIN ", ",", " AT ", "VLIN ", ",", " AT ", "VTAB ",// $68-$6F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
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"=", "=", ")", null, "LIST ", ",", null, "POP ", // $70-$77 //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$
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null, "NO DSP ", "NO TRACE ", "DSP ", "DSP ", "TRACE ", "PR # ", "IN # " // $78-$7F //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$
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null, null, null, ":", "LOAD ", "SAVE ", null, "RUN ", // $00-$07
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null, "DEL ", ", ", "NEW ", "CLR ", "AUTO ", null, "MAN ", // $08-$0F
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"HIMEM:", "LOMEM:", "+", "-", "*", "/", "=", "#", // $10-$17
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">=", ">", "<=", "<>", "<", " AND ", " OR ", " MOD ",// $18-$1F
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"^", null, "(", ",", " THEN ", " THEN ", ",", ",", // $20-$27
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"\"", "\"", "(", null, null, "(", " PEEK ", " RND ",// $28-$2F
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"SGN ", "ABS ", "PDL ", null, "(", "+", "-", "NOT ", // $30-$37
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"(", "=", "#", " LEN(", " ASC(", " SCRN(", ",", "(", // $38-$3F
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"$", null, "(", ",", ",", ";", ";", ";", // $40-$47
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",", ",", ",", "TEXT ", "GR ", "CALL ", "DIM ", "DIM ", // $48-$4F
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"TAB ", "END ", "INPUT ", "INPUT ", "INPUT ", "FOR ", "=", " TO ", // $50-$57
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" STEP ", "NEXT ", ",", "RETURN ", "GOSUB ", "REM ", "LET ", "GOTO ",// $58-$5F
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"IF ", "PRINT ", "PRINT ", "PRINT ", " POKE ", ",", "COLOR= ", "PLOT ",// $60-$67
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",", "HLIN ", ",", " AT ", "VLIN ", ",", " AT ", "VTAB ",// $68-$6F
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"=", "=", ")", null, "LIST ", ",", null, "POP ", // $70-$77
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null, "NO DSP ", "NO TRACE ", "DSP ", "DSP ", "TRACE ", "PR # ", "IN # " // $78-$7F
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};
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/**
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@ -84,40 +86,59 @@ public class IntegerBasicFileFilter implements FileFilter {
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while (offset < fileData.length) {
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int lineLength = AppleUtil.getUnsignedByte(fileData[offset]);
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int lineNumber = AppleUtil.getWordValue(fileData, offset+1);
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if (fileData[offset+lineLength-1] != 0x01) { // sanity check
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printWriter.println("Listing error: possible embedded machine code.");
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return byteArray.toByteArray();
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}
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boolean inComment = false;
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boolean inLiteral = false;
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printWriter.print(lineNumber);
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printWriter.print(' ');
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for (int i=offset+3; i<(offset+lineLength); i++) {
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byte byt = fileData[i];
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if ((byt & 0x80) != 0) {
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int value = AppleUtil.getUnsignedByte(byt);
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// numbers follow a number digit
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if (!inComment && value >= 0xb1 && value <= 0xb9) {
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int integer = AppleUtil.getWordValue(fileData, i+1);
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printWriter.print(integer);
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i+= 2;
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} else {
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char ch = (char)(byt&0x7f);
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if (ch < 0x20) { // handle control characters
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printWriter.print("<CTRL-"); //$NON-NLS-1$
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printWriter.print((char)('@' + ch));
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printWriter.print(">"); //$NON-NLS-1$
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} else {
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printWriter.print(ch);
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}
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int i = offset + 3;
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while (i < offset + lineLength) { // do one line
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byte b = fileData[i];
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char c = (char)(b & 0x7f);
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if (inComment) {
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while (fileData[i] != 0x01) { // until EOL
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c = (char)(fileData[i] & 0x7f);
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printWriter.print(c);
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i++;
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}
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} else {
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String token = tokens[byt];
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inComment = false;
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} else if (inLiteral) {
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while (fileData[i] != 0x29) { // until close quote
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c = (char)(fileData[i] & 0x7f);
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if (c < 0x20) { // control
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printWriter.print("<CTRL-" + (char)('@' + c) + ">");
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} else { // normal
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printWriter.print(c);
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}
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i++;
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}
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inLiteral = false;
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} else if ((b & 0x80) == 0) { // token
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String token = tokens[(int)b];
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i++;
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if (token != null) {
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printWriter.print(token);
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inComment = (byt == 0x5d); // REM statement
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} else {
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// ignoring unknown tokens
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// $00 and $01 seem to be valid; the others may or may not be valid
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inComment = (b == 0x5d); // REM statement
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inLiteral = (b == 0x28); // open quote
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}
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} else { // non-token
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if (c >= 0x30 && c <= 0x39) { // numeric constant
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int n = AppleUtil.getWordValue(fileData, i + 1);
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printWriter.print(n);
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i += 3;
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} else { //identifier
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while ((fileData[i] & 0x80) != 0) {
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c = (char)(fileData[i] & 0x7f);
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printWriter.print(c);
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i++;
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}
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}
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}
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}
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offset+= lineLength;
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offset += lineLength;
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printWriter.println();
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}
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return byteArray.toByteArray();
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@ -128,8 +149,8 @@ public class IntegerBasicFileFilter implements FileFilter {
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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(".int")) { //$NON-NLS-1$
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fileName = fileName + ".int"; //$NON-NLS-1$
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if (!fileName.toLowerCase().endsWith(".int")) {
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fileName = fileName + ".int";
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}
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return fileName;
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}
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