2 files changed, 137 insertions, 1 deletions

diff --git a/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingFormat.java b/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingFormat.java
index 4799589..c770ddc 100644
--- a/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingFormat.java
+++ b/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingFormat.java
@@ -15,7 +15,8 @@ public enum MappingFormat {
         ENIGMA_FILE(EnigmaMappingsWriter.FILE, EnigmaMappingsReader.FILE),
         ENIGMA_DIRECTORY(EnigmaMappingsWriter.DIRECTORY, EnigmaMappingsReader.DIRECTORY),
         TINY_FILE(null, TinyMappingsReader.INSTANCE),
-        SRG_FILE(SrgMappingsWriter.INSTANCE, null);
+        SRG_FILE(SrgMappingsWriter.INSTANCE, null),
+        PROGUARD(null, ProguardMappingsReader.INSTANCE);
 
         private final MappingsWriter writer;
         private final MappingsReader reader;
diff --git a/src/main/java/cuchaz/enigma/translation/mapping/serde/ProguardMappingsReader.java b/src/main/java/cuchaz/enigma/translation/mapping/serde/ProguardMappingsReader.java
new file mode 100644
index 0000000..76f0923
--- /dev/null
+++ b/src/main/java/cuchaz/enigma/translation/mapping/serde/ProguardMappingsReader.java
@@ -0,0 +1,135 @@
+package cuchaz.enigma.translation.mapping.serde;
+
+import com.google.common.base.Charsets;
+import cuchaz.enigma.ProgressListener;
+import cuchaz.enigma.command.MappingCommandsUtil;
+import cuchaz.enigma.throwables.MappingParseException;
+import cuchaz.enigma.translation.mapping.EntryMapping;
+import cuchaz.enigma.translation.mapping.MappingSaveParameters;
+import cuchaz.enigma.translation.mapping.tree.EntryTree;
+import cuchaz.enigma.translation.mapping.tree.HashEntryTree;
+import cuchaz.enigma.translation.representation.MethodDescriptor;
+import cuchaz.enigma.translation.representation.TypeDescriptor;
+import cuchaz.enigma.translation.representation.entry.ClassEntry;
+import cuchaz.enigma.translation.representation.entry.FieldEntry;
+import cuchaz.enigma.translation.representation.entry.MethodEntry;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class ProguardMappingsReader implements MappingsReader {
+    public static final ProguardMappingsReader INSTANCE = new ProguardMappingsReader();
+    private static final String NAME = "[a-zA-Z0-9_\\-.$<>]+";
+    private static final String TYPE = NAME + "(?:\\[])*";
+    private static final String TYPE_LIST = "|(?:(?:" + TYPE + ",)*" + TYPE + ")";
+    private static final Pattern CLASS = Pattern.compile("(" + NAME + ") -> (" + NAME + "):");
+    private static final Pattern FIELD = Pattern.compile(" {4}(" + TYPE + ") (" + NAME + ") -> (" + NAME + ")");
+    private static final Pattern METHOD = Pattern.compile(" {4}(?:[0-9]+:[0-9]+:)?(" + TYPE + ") (" + NAME + ")\\((" + TYPE_LIST + ")\\) -> (" + NAME + ")");
+
+    public ProguardMappingsReader() {}
+
+
+    @Override
+    public EntryTree<EntryMapping> read(Path path, ProgressListener progress, MappingSaveParameters saveParameters) throws MappingParseException, IOException {
+        EntryTree<EntryMapping> mappings = new HashEntryTree<>();
+
+        int lineNumber = 0;
+        ClassEntry currentClass = null;
+        for (String line : Files.readAllLines(path, Charsets.UTF_8)) {
+            lineNumber++;
+
+            if (line.startsWith("#") || line.isEmpty()) {
+                continue;
+            }
+
+            Matcher classMatcher = CLASS.matcher(line);
+            Matcher fieldMatcher = FIELD.matcher(line);
+            Matcher methodMatcher = METHOD.matcher(line);
+
+            if (classMatcher.matches()) {
+                String name = classMatcher.group(1);
+                String targetName = classMatcher.group(2);
+
+                mappings.insert(currentClass = new ClassEntry(name.replace('.', '/')), new EntryMapping(ClassEntry.getInnerName(targetName.replace('.', '/'))));
+            } else if (fieldMatcher.matches()) {
+                String type = fieldMatcher.group(1);
+                String name = fieldMatcher.group(2);
+                String targetName = fieldMatcher.group(3);
+
+                if (currentClass == null) {
+                    throw new MappingParseException(path::toString, lineNumber, "field mapping not inside class: " + line);
+                }
+
+                mappings.insert(new FieldEntry(currentClass, name, new TypeDescriptor(getDescriptor(type))), new EntryMapping(targetName));
+            } else if (methodMatcher.matches()) {
+                String returnType = methodMatcher.group(1);
+                String name = methodMatcher.group(2);
+                String[] parameterTypes = methodMatcher.group(3).isEmpty() ? new String[0] : methodMatcher.group(3).split(",");
+                String targetName = methodMatcher.group(4);
+
+                if (currentClass == null) {
+                    throw new MappingParseException(path::toString, lineNumber, "method mapping not inside class: " + line);
+                }
+
+                mappings.insert(new MethodEntry(currentClass, name, new MethodDescriptor(getDescriptor(returnType, parameterTypes))), new EntryMapping(targetName));
+            } else {
+                throw new MappingParseException(path::toString, lineNumber, "invalid mapping line: " + line);
+            }
+        }
+
+        return MappingCommandsUtil.invert(mappings);
+    }
+
+    private String getDescriptor(String type) {
+        StringBuilder descriptor = new StringBuilder();
+
+        while (type.endsWith("[]")) {
+            descriptor.append("[");
+            type = type.substring(0, type.length() - 2);
+        }
+
+        switch (type) {
+            case "byte":
+                return descriptor + "B";
+            case "char":
+                return descriptor + "C";
+            case "short":
+                return descriptor + "S";
+            case "int":
+                return descriptor + "I";
+            case "long":
+                return descriptor + "J";
+            case "float":
+                return descriptor + "F";
+            case "double":
+                return descriptor + "D";
+            case "boolean":
+                return descriptor + "Z";
+            case "void":
+                return descriptor + "V";
+        }
+
+        descriptor.append("L");
+        descriptor.append(type.replace('.', '/'));
+        descriptor.append(";");
+
+        return descriptor.toString();
+    }
+
+    private String getDescriptor(String returnType, String[] parameterTypes) {
+        StringBuilder descriptor = new StringBuilder();
+        descriptor.append('(');
+
+        for (String parameterType : parameterTypes) {
+            descriptor.append(getDescriptor(parameterType));
+        }
+
+        descriptor.append(')');
+        descriptor.append(getDescriptor(returnType));
+
+        return descriptor.toString();
+    }
+}