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author zaaarf <me@zaaarf.foo>2024-01-24 17:16:50 +0100
committer zaaarf <me@zaaarf.foo>2024-01-24 17:16:50 +0100
commitd06b6211bc0815c36d44c65312c097058901b1c5 (patch)
tree1a942f8d9dfd08ff8f06c576f63ba0663ce051b0 /src/main/java/ftbsc/lll/tools/StackTools.java
parent660730086dc6b8895eb871a3df98956041453983 (diff)
chore: internal reorganisation (breaking)0.5.0
Diffstat (limited to 'src/main/java/ftbsc/lll/tools/StackTools.java')
-rw-r--r--src/main/java/ftbsc/lll/tools/StackTools.java86
1 files changed, 0 insertions, 86 deletions
diff --git a/src/main/java/ftbsc/lll/tools/StackTools.java b/src/main/java/ftbsc/lll/tools/StackTools.java
deleted file mode 100644
index f055ee2..0000000
--- a/src/main/java/ftbsc/lll/tools/StackTools.java
+++ /dev/null
@@ -1,86 +0,0 @@
-package ftbsc.lll.tools;
-
-import org.objectweb.asm.Opcodes;
-import org.objectweb.asm.tree.*;
-
-import java.util.Comparator;
-
-/**
- * Various methods for manipulating the stack.
- * Includes anything from instantiation to variable manipulation - just about
- * anything that loads stuff on or from the stack.
- */
-public class StackTools implements Opcodes {
- /**
- * Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load
- * the parameters.
- * The created object is loaded on the stack.
- * @param name the internal name of the object to initialize, where
- * the internal name of a class is its fully qualified name, where '.' are replaced by '/'
- * @param desc the descriptor of the constructor to call
- * @param args nodes containing instructions to load the constructor arguments, in the right order
- * @return an instruction list containing the opcodes needed to create the new object and load it on the stack.
- */
- public static InsnList instantiate(String name, String desc, AbstractInsnNode... args) {
- InsnSequence is = new InsnSequence();
- is.add(args);
- return instantiate(name, desc, is);
- }
-
- /**
- * Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load
- * the parameters.
- * The created object is loaded on the stack.
- * @param name the internal name of the object to initialize, where
- * the internal name of a class is its fully qualified name, where '.' are replaced by '/'
- * @param desc the descriptor of the constructor to call
- * @param args a list of instructions loading the constructor arguments onto the stack in the correct order
- * @return an instruction list containing the opcodes needed to create the new object and load it on the stack.
- */
- public static InsnList instantiate(String name, String desc, InsnList args) {
- InsnSequence list = new InsnSequence();
- list.add(new TypeInsnNode(NEW, name), new InsnNode(DUP));
- if(args != null) list.add(args);
- list.add(new MethodInsnNode(INVOKESPECIAL, name, "<init>", desc, false));
- return list;
- }
-
-
- /**
- * Creates a new local variable, lasting in scope from the first to the last label of the given method.
- * @param method the method for which to declare the local variable
- * @param name the variable's name
- * @param desc the type descriptor for the new variable
- * @return the index value of the new local variable
- */
- public static int addLocalVariable(MethodNode method, String name, String desc) {
- return addLocalVariable(
- method, name, desc,
- (LabelNode) PatternMatcher.builder().label().build().find(method).getFirst(),
- (LabelNode) PatternMatcher.builder().label().reverse().build().find(method).getFirst()
- );
- }
-
- /**
- * Creates a new local variable, lasting in scope between two given {@link LabelNode}s.
- * @param method the method for which to declare the local variable
- * @param name the variable's name
- * @param desc the type descriptor for the new variable
- * @param start the label at which the variable should enter scope
- * @param end the label at which the variable should go out of scope
- * @return the index value of the new local variable
- */
- public static int addLocalVariable(MethodNode method, String name, String desc, LabelNode start, LabelNode end) {
- final int targetIndex =
- method.localVariables
- .stream()
- .max(Comparator.comparingInt(v -> v.index))
- .map(var -> var.desc.equals("J") || var.desc.equals("D")
- ? var.index + 2 //skip two if long or double - major java moment
- : var.index + 1)
- .orElse(0);
- LocalVariableNode variable = new LocalVariableNode(name, desc, null, start, end, targetIndex);
- method.localVariables.add(variable);
- return targetIndex;
- }
-}