Add Integer.parseInt and Integer.parseUnsignedInt MCRs

Author: Gaming32

src/main/java/net/raphimc/javadowngrader/transformer/j8/Java9ToJava8.java

@@ -19,7 +19,25 @@
 
 import net.raphimc.javadowngrader.transformer.DowngradeResult;
 import net.raphimc.javadowngrader.transformer.DowngradingTransformer;
-import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.*;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.BufferMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.ClassGetModuleMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.InputStreamReadAllBytesMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.InputStreamTransferToMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.IntegerParseIntMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.ListOfMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MapEntryMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MapOfEntriesMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MapOfMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MatcherAppendReplacementMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MatcherAppendTailMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.MathFloorModMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.ObjectsRequireNonNullElseGetMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.ObjectsRequireNonNullElseMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.OptionalIfPresentOrElseMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.OptionalOrMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.OptionalStreamMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.RuntimeVersionMCR;
+import net.raphimc.javadowngrader.transformer.j8.methodcallreplacer.SetOfMCR;
 import net.raphimc.javadowngrader.transformer.j8.methodinserter.PathEndsWithMI;
 import net.raphimc.javadowngrader.transformer.j8.methodinserter.PathResolveMI;
 import net.raphimc.javadowngrader.transformer.j8.methodinserter.PathStartsWithMI;
@@ -88,6 +106,9 @@ public Java9ToJava8() {
         this.addMethodInserter("java/nio/file/Path", "startsWith", "(Ljava/lang/String;)Z", new PathStartsWithMI());
         this.addMethodInserter("java/nio/file/Path", "endsWith", "(Ljava/lang/String;)Z", new PathEndsWithMI());
         this.addMethodInserter("java/nio/file/Path", "toFile", "()Ljava/io/File;", new PathToFileMI());
+
+        this.addMethodCallReplacer(Opcodes.INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/CharSequence;III)I", new IntegerParseIntMCR());
+        this.addMethodCallReplacer(Opcodes.INVOKESTATIC, "java/lang/Integer", "parseUnsignedInt", "(Ljava/lang/CharSequence;III)I", new IntegerParseIntMCR());
     }
 
     @Override

src/main/java/net/raphimc/javadowngrader/transformer/j8/methodcallreplacer/IntegerParseIntMCR.java

@@ -0,0 +1,55 @@
+/*
+ * This file is part of JavaDowngrader - https://github.com/RaphiMC/JavaDowngrader
+ * Copyright (C) 2023-2024 RK_01/RaphiMC and contributors
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.raphimc.javadowngrader.transformer.j8.methodcallreplacer;
+
+import net.raphimc.javadowngrader.RuntimeDepCollector;
+import net.raphimc.javadowngrader.transformer.DowngradeResult;
+import net.raphimc.javadowngrader.transformer.MethodCallReplacer;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.ClassNode;
+import org.objectweb.asm.tree.InsnList;
+import org.objectweb.asm.tree.InsnNode;
+import org.objectweb.asm.tree.MethodInsnNode;
+import org.objectweb.asm.tree.MethodNode;
+
+public class IntegerParseIntMCR implements MethodCallReplacer {
+    @Override
+    public InsnList getReplacement(ClassNode classNode, MethodNode method, String originalName, String originalDesc, RuntimeDepCollector depCollector, DowngradeResult result) {
+        final InsnList replacement = new InsnList();
+
+        // CharSequence start end radix
+        replacement.add(new InsnNode(Opcodes.DUP2_X2));
+        // end radix CharSequence start end radix
+        replacement.add(new InsnNode(Opcodes.POP));
+        // end radix CharSequence start end
+        replacement.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/lang/CharSequence", "subSequence", "(II)Ljava/lang/CharSequence;"));
+        // end radix CharSequence
+        replacement.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/lang/CharSequence", "toString", "()Ljava/lang/String;"));
+        // end radix String
+        replacement.add(new InsnNode(Opcodes.SWAP));
+        // end String radix
+        replacement.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/Integer", originalName, "(Ljava/lang/String;I)I"));
+        // end result
+        replacement.add(new InsnNode(Opcodes.SWAP));
+        // result end
+        replacement.add(new InsnNode(Opcodes.POP));
+        // result
+
+        return replacement;
+    }
+}