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feat: added put(FieldProxy) and set(FieldProxy) to easily manipulate fields

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zaaarf 2023-03-01 18:42:53 +01:00
parent bc649ed0f1
commit de6cd06871
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1 changed files with 41 additions and 2 deletions
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43
src/main/java/ftbsc/lll/tools/StackTools.java
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@ -1,9 +1,11 @@
package ftbsc.lll.tools; package ftbsc.lll.tools;
import ftbsc.lll.proxies.MethodProxy; import ftbsc.lll.proxies.MethodProxy;
import ftbsc.lll.proxies.FieldProxy;
import org.objectweb.asm.Opcodes; import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.*; import org.objectweb.asm.tree.*;
import java.lang.reflect.Modifier;
import java.util.Comparator; import java.util.Comparator;
/** /**
@ -86,9 +88,46 @@ public class StackTools implements Opcodes {
} }
/** /**
* Calls the given {@link MethodProxy} with the given opcode. * Builds a node setting the given {@link FieldProxy} to the value currently
* on top of the stack.
* @implSpec if the field is not static, you are to load the containing
* object onto the stack the value you want to assign.
* @param f a {@link FieldProxy} representing the field to put.
* @return a {@link FieldInsnNode} representing the built node.
* @since 0.3.0
*/
public static FieldInsnNode put(FieldProxy f) {
return new FieldInsnNode(
Modifier.isStatic(f.getModifiers()) ? PUTSTATIC : PUTFIELD,
f.getParent().replace('.', '/'),
f.getSrgName(),
f.getDescriptor()
);
}
/**
* Builds a node loading the given {@link FieldProxy} onto the stack.
* @implSpec if the field is not static, you are to load the containing
* object onto the stack before calling this.
* @param f a {@link FieldProxy} representing the field to load.
* @return a {@link FieldInsnNode} representing the built node.
* @since 0.3.0
*/
public static FieldInsnNode get(FieldProxy f) {
return new FieldInsnNode(
Modifier.isStatic(f.getModifiers()) ? GETSTATIC : GETFIELD,
f.getParent().replace('.', '/'),
f.getSrgName(),
f.getDescriptor()
);
}
/**
* Builds a node calling the given {@link MethodProxy} with the given opcode.
* @param m a {@link MethodProxy} representing the method to call. * @param m a {@link MethodProxy} representing the method to call.
* @return a {@link MethodInsnNode} representing the build node. * @param opcode the opcode to use to call, must be one of INVOKEDYNAMIC,
* INVOKESPECIAL, INVOKEINTERFACE, INVOKESTATIC or INVOKEVIRTUAL.
* @return a {@link MethodInsnNode} representing the built node.
* @since 0.3.0 * @since 0.3.0
*/ */
public static MethodInsnNode call(MethodProxy m, int opcode) { public static MethodInsnNode call(MethodProxy m, int opcode) {