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feat: added SrgMapper, which parses a .tsrg file and uses it for converting between MCP and SRG
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163
src/main/java/ftbsc/lll/tools/SrgMapper.java
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src/main/java/ftbsc/lll/tools/SrgMapper.java
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package ftbsc.lll.tools;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicReference;
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import java.util.stream.Stream;
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/**
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* Parses a .tsrg file into a mapper capable of converting from
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* deobfuscated names to srg names.
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* Obviously, it may only be used at runtime if the .tsrg file is
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* included in the resources. However, in that case, I'd recommend
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* using the built-in Forge one and refrain from including an extra
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* resource for no good reason.
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* @since 0.2.0
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*/
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public class SrgMapper {
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/**
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* A Map using the deobfuscated names as keys,
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* holding information for that Srg class as value.
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*/
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private final Map<String, ObfuscationData> mapper = new HashMap<>();
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/**
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* The public constructor.
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* Should be passed a Stream of Strings, one representing each line.
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* Whether they contain line endings or not is irrelevant.
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* @param str a Stream of strings
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*/
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public SrgMapper(Stream<String> str) {
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AtomicReference<String> currentClass = new AtomicReference<>("");
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str.forEach(l -> {
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if(l.startsWith("\t"))
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mapper.get(currentClass.get()).addMember(l);
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else {
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ObfuscationData s = new ObfuscationData(l);
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currentClass.set(s.mcpName);
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mapper.put(s.mcpName, s);
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}
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});
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}
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/**
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* Gets the SRG-obfuscated name of the class.
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* @param mcp the MCP (deobfuscated) internal name of the desired class
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* @return the SRG name of the class, or null if it wasn't found
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*/
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public String getSrgClass(String mcp) {
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ObfuscationData data = mapper.get(mcp);
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return data == null ? null : data.srgName;
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}
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/**
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* Gets the SRG-obfuscated name of a class member (field or method).
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* The method signature must be in this format: "methodName methodDescriptor",
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* with a space, because that's how it is in .tsrg files.
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* @param mcpClass the MCP (deobfuscated) internal name of the container class
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* @param member the field name or method signature
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* @return the SRG name of the given member, or null if it wasn't found
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*/
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public String getSrgMember(String mcpClass, String member) {
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ObfuscationData data = mapper.get(mcpClass);
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if(data == null)
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return null;
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return data.members.get(member);
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}
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/**
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* Used internally. Gets the obfuscation data corresponding to the given SRG name.
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* @return the desired ObfuscationData object, or null if it wasn't found
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*/
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private ObfuscationData getObfuscationData(String srg) {
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for(ObfuscationData s : mapper.values())
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if(s.srgName.equals(srg))
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return s;
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return null;
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}
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/**
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* Gets the MCP (deobfuscated) name of the class.
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* Due to how it's implemented, it's considerably less efficient than its
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* opposite operation.
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* @param srg the SRG-obfuscated internal name of the desired class
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* @return the MCP name of the class, or null if it wasn't found
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*/
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public String getMcpClass(String srg) {
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ObfuscationData data = getObfuscationData(srg);
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return data == null ? null : data.mcpName;
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}
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/**
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* Gets the MCP (deobfuscated) name of the given member.
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* Due to how it's implemented, it's considerably less efficient than its
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* opposite operation.
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* @param srgClass the SRG-obfuscated internal name of the container class
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* @param member the field name or method signature
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* @return the MCP name of the given member, or null if it wasn't found
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*/
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public String getMcpMember(String srgClass, String member) {
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ObfuscationData data = getObfuscationData(srgClass);
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if(data == null)
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return null;
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for(String mcp : data.members.keySet())
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if(data.members.get(mcp).equals(member))
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return mcp;
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return null;
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}
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/**
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* Private class used internally for storing information about each
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* class. It's private because there is no good reason anyone would
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* want to access this outside of this class.
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*/
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private static class ObfuscationData {
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/**
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* The MCP internal name (FQN with '/' instad of '.') of the class.
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*/
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private final String mcpName;
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/**
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* The SRG internal name (FQN with '/' instad of '.') of the class.
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*/
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private final String srgName;
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/**
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* A Map tying each member's deobfuscatede name or signature to its
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* SRG name.
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*/
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private final Map<String, String> members;
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/**
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* The constructor. It takes in the line where the class is declared,
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* which looks something like this:
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* {@code internal/name/mcp internal/name/srg }
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* @param s the String represeting the declaration line
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*/
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private ObfuscationData(String s) {
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String[] split = s.trim().split(" ");
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this.mcpName = split[0];
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this.srgName = split[1];
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this.members = new HashMap<>();
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}
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/**
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* Adds a member to the target class. It takes in the line where the
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* member is declared.
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* For fields it looks like this:
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* {@code fieldMcpName field_srg_name}
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* For methods it looks like this:
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* {@code methodName methodDescriptor method_srg_name}
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* @param s the String representing the declaration line
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*/
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public void addMember(String s) {
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String[] split = s.trim().split(" ");
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if(split.length == 2) //field
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members.put(split[0], split[1]);
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else if (split.length == 3) //method
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members.put(split[0] + split[1], split[2]);
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}
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}
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}
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