/**
* Essentially adds every file that the user inputs and converts to object file
*
* @param path The name of the path
* @param errors The list of errors that will be used
*/
public void addFile(final String path, final List<Error> errors) {
List<Error> myerrors = new ArrayList<Error>();
final File file = new File(path);
if (!file.isFile()) myerrors.add(new Error(path, SimCodes.IO_BAD_PATH));
else if (!file.canRead()) myerrors.add(new Error(path, SimCodes.IO_BAD_READ));
else if (file.length() <= 0) myerrors.add(new Error(path, SimCodes.IO_BAD_FILE));
BufferedReader fileReader = null;
do {
if (myerrors.size() != 0) break;
try {
fileReader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
} catch (final FileNotFoundException e) {
myerrors.add(new Error("file not found: " + path, SimCodes.IO_BAD_PATH));
}
if (myerrors.size() != 0) break;
final String fName = file.getName();
final ObjectFile ofile = new ObjectFile(path, fName, fileReader);
for (final ObjectFile f : files)
if (ofile.getFileName().equals(f.getFileName()))
myerrors.add(new Error(path, SimCodes.UI_DUP_FILE));
myerrors = ofile.parse();
if (myerrors.size() != 0) break;
files.add(ofile);
final Set<String> newExt = new HashSet<String>(ofile.getParsedExternals());
newExt.removeAll(defined.keySet());
undefined.addAll(newExt);
undefined.removeAll(ofile.getParsedSymbols().keySet());
for (final Entry<String, Location> e : ofile.getParsedSymbols().entrySet())
defined.put(e.getKey(), FileLocation.make(ofile.getFileName(), e.getValue()));
} while (false);
try {
if (fileReader != null) fileReader.close();
} catch (final IOException e) {
}
errors.addAll(myerrors);
}
/**
* Links all the segment
*
* @param errors The lists of errors that will be added
* @param symbols Map of all symbols that are being referenced
*/
public void link(final List<Error> errors, final Map<String, Short> symbols) {
assert undefined.size() == 0;
symbols.clear();
final Map<String, Short> plaMap = new TreeMap<String, Short>();
short pla = ipla;
for (final ObjectFile ofile : files) {
plaMap.put(ofile.getFileName(), pla);
pla += ofile.getSize();
}
for (final Entry<String, FileLocation> e : defined.entrySet()) {
final FileLocation fl = e.getValue();
symbols.put(e.getKey(), (short) ((fl.file == null ? 0 : plaMap.get(fl.file)) + fl.address));
}
if ((pla & 0xFE00) != (ipla & 0xFE00)) {
if ((pla - ipla & 0xFFFF) > 0x1FF)
errors.add(
new Error(
"program length: " + Utilities.sShortToHex((short) (pla - ipla)),
SimCodes.LINK_PROG_TOO_LONG));
else
errors.add(
new Error(
"maximum IPLA page offset: " + Utilities.sShortToHex((short) (0x1FF + ipla - pla)),
SimCodes.LINK_IPLA_OFF_PAGE));
return;
}
for (final ObjectFile ofile : files) {
pla = plaMap.get(ofile.getFileName());
for (final Text t : ofile.getParsedTexts()) {
final short mask = t.getMask();
final short newAddr = (short) (pla + t.getAddress());
final short newVal =
(short)
((t.getExternal() == null ? pla : symbols.get(t.getExternal()))
+ (t.getValue() & mask));
if (mask > 0 && (newVal & ~mask) != (newAddr + 1 & ~mask))
errors.add(
new Error(
t.getLine(),
"try IPLA page offset < " + (ipla - newVal + 0x200),
SimCodes.LINK_IPLA_OFF_PAGE));
m.setMemory(newAddr, (short) (t.getValue() & ~mask | newVal & mask));
}
}
final FileLocation fl = defined.get(main);
m.getPCRegister().setValue((short) (fl.file == null ? 0 : plaMap.get(fl.file) + fl.address));
}