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package cuchaz.enigma.mapping;
import com.google.common.base.Charsets;
import com.google.common.collect.Queues;
import cuchaz.enigma.throwables.MappingConflict;
import cuchaz.enigma.throwables.MappingParseException;
import java.io.*;
import java.util.Deque;
public class MappingsEnigmaReader
{
public Mappings read(File file) throws IOException, MappingParseException {
Mappings mappings;
// Multiple file
if (file.isDirectory())
{
mappings = new Mappings(Mappings.FormatType.ENIGMA_DIRECTORY);
readDirectory(mappings, file);
}
else
{
mappings = new Mappings();
readFile(mappings, file);
}
return mappings;
}
public void readDirectory(Mappings mappings, File directory) throws IOException, MappingParseException {
File[] files = directory.listFiles();
if (files != null) {
for (File file : files) {
if (file.isFile() && !file.getName().startsWith(".") && file.getName().endsWith(".mapping"))
readFile(mappings, file);
else if (file.isDirectory())
readDirectory(mappings, file.getAbsoluteFile());
}
}
else
throw new IOException("Cannot access directory" + directory.getAbsolutePath());
}
public Mappings readFile(Mappings mappings, File file) throws IOException, MappingParseException {
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file), Charsets.UTF_8));
Deque<Object> mappingStack = Queues.newArrayDeque();
int lineNumber = 0;
String line;
while ((line = in.readLine()) != null) {
lineNumber++;
// strip comments
int commentPos = line.indexOf('#');
if (commentPos >= 0) {
line = line.substring(0, commentPos);
}
// skip blank lines
if (line.trim().length() <= 0) {
continue;
}
// get the indent of this line
int indent = 0;
for (int i = 0; i < line.length(); i++) {
if (line.charAt(i) != '\t') {
break;
}
indent++;
}
// handle stack pops
while (indent < mappingStack.size()) {
mappingStack.pop();
}
String[] parts = line.trim().split("\\s");
try {
// read the first token
String token = parts[0];
if (token.equalsIgnoreCase("CLASS")) {
ClassMapping classMapping;
if (indent <= 0) {
// outer class
classMapping = readClass(parts, false);
mappings.addClassMapping(classMapping);
} else {
// inner class
if (!(mappingStack.peek() instanceof ClassMapping)) {
throw new MappingParseException(file, lineNumber, "Unexpected CLASS entry here!");
}
classMapping = readClass(parts, true);
((ClassMapping) mappingStack.peek()).addInnerClassMapping(classMapping);
}
mappingStack.push(classMapping);
} else if (token.equalsIgnoreCase("FIELD")) {
if (mappingStack.isEmpty() || !(mappingStack.peek() instanceof ClassMapping)) {
throw new MappingParseException(file, lineNumber, "Unexpected FIELD entry here!");
}
((ClassMapping) mappingStack.peek()).addFieldMapping(readField(parts));
} else if (token.equalsIgnoreCase("METHOD")) {
if (mappingStack.isEmpty() || !(mappingStack.peek() instanceof ClassMapping)) {
throw new MappingParseException(file, lineNumber, "Unexpected METHOD entry here!");
}
MethodMapping methodMapping = readMethod(parts);
((ClassMapping) mappingStack.peek()).addMethodMapping(methodMapping);
mappingStack.push(methodMapping);
} else if (token.equalsIgnoreCase("ARG")) {
if (mappingStack.isEmpty() || !(mappingStack.peek() instanceof MethodMapping)) {
throw new MappingParseException(file, lineNumber, "Unexpected ARG entry here!");
}
((MethodMapping) mappingStack.peek()).addArgumentMapping(readArgument(parts));
}
} catch (ArrayIndexOutOfBoundsException | IllegalArgumentException ex) {
throw new MappingParseException(file, lineNumber, "Malformed line:\n" + line);
} catch (MappingConflict e) {
throw new MappingParseException(file, lineNumber, e.getMessage());
}
}
in.close();
return mappings;
}
private ArgumentMapping readArgument(String[] parts) {
return new ArgumentMapping(Integer.parseInt(parts[1]), parts[2]);
}
private ClassMapping readClass(String[] parts, boolean makeSimple) {
if (parts.length == 2) {
return new ClassMapping(parts[1]);
} else {
return new ClassMapping(parts[1], parts[2]);
}
}
/* TEMP */
protected FieldMapping readField(String[] parts) {
return new FieldMapping(parts[1], new Type(parts[3]), parts[2]);
}
private MethodMapping readMethod(String[] parts) {
if (parts.length == 3) {
return new MethodMapping(parts[1], new Signature(parts[2]));
} else {
return new MethodMapping(parts[1], new Signature(parts[3]), parts[2]);
}
}
}
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