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fixes an issue in the logisim hex reader; closes #642

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hneemann 2021-02-09 18:32:57 +01:00
parent 8a8f1260fc
commit 7032942ad3
2 changed files with 41 additions and 32 deletions
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67
src/main/java/de/neemann/digital/core/memory/importer/LogisimReader.java
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@ -9,7 +9,8 @@ import de.neemann.digital.core.Bits;
import de.neemann.digital.lang.Lang;
import java.io.*;
import java.util.StringTokenizer;
import static java.io.StreamTokenizer.*;
/**
* Reader to read the original Logisim hex file format
@ -38,42 +39,42 @@ public class LogisimReader implements ValueArrayReader {
@Override
public void read(ValueArray valueArray) throws IOException {
try (BufferedReader br = new BufferedReader(reader)) {
String header = br.readLine();
try (BufferedReader bufferedReader = new BufferedReader(reader)) {
String header = bufferedReader.readLine();
if (header == null || !header.equals("v2.0 raw"))
throw new IOException(Lang.get("err_invalidFileFormat"));
String line;
StreamTokenizer t = new StreamTokenizer(bufferedReader);
t.resetSyntax();
t.commentChar('#');
t.wordChars('a', 'f');
t.wordChars('A', 'F');
t.wordChars('x', 'x');
t.wordChars('X', 'X');
t.wordChars('0', '9');
t.whitespaceChars(0, ' ');
int pos = 0;
while ((line = br.readLine()) != null) {
while (t.nextToken() != TT_EOF) {
try {
int p = line.indexOf('#');
if (p >= 0)
line = line.substring(0, p).trim();
else
line = line.trim();
StringTokenizer tc = new StringTokenizer(line, " \t");
while (tc.hasMoreTokens()) {
String num = tc.nextToken();
int rle = 1;
p = num.indexOf('*');
if (p > 0) {
rle = Integer.parseInt(num.substring(0, p));
num = num.substring(p + 1).trim();
}
if (num.length() > 2 && num.charAt(0) == '0' && (num.charAt(1) == 'x' || num.charAt(1) == 'X'))
num = num.substring(2);
if (num.length() > 0) {
long v = Bits.decode(num, 0, 16);
for (int i = 0; i < rle; i++) {
String vStr = t.sval;
if (vStr == null)
throw new IOException("invalid token in line " + t.lineno());
if (t.nextToken() == '*') {
t.nextToken();
if (t.sval == null)
throw new IOException("invalid token in line " + t.lineno());
long v = getHexLong(t.sval);
int reps = (int) Bits.decode(vStr, 0, 10);
for (int i = 0; i < reps; i++) {
valueArray.set(pos, v);
pos++;
}
} else {
t.pushBack();
valueArray.set(pos, getHexLong(vStr));
pos++;
}
}
} catch (Bits.NumberFormatException e) {
throw new IOException(e);
}
@ -81,4 +82,12 @@ public class LogisimReader implements ValueArrayReader {
}
}
private long getHexLong(String vStr) throws Bits.NumberFormatException {
int p = 0;
if (vStr.length() > 2 && vStr.charAt(0) == '0' && (vStr.charAt(1) == 'x' || vStr.charAt(1) == 'X'))
p = 2;
return Bits.decode(vStr, p, 16);
}
}