diff options
author | Roman Shevchenko <roman.shevchenko@jetbrains.com> | 2014-08-28 20:52:43 +0400 |
---|---|---|
committer | Roman Shevchenko <roman.shevchenko@jetbrains.com> | 2014-08-28 20:52:43 +0400 |
commit | 663631f0456fcc245dd835889f86541d75161c53 (patch) | |
tree | e183fa9777242e2900ff3648a726f05b190bc51b /src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java | |
parent | f864084061806fda5510e50bfd2e69bf1dea406b (diff) | |
download | fernflower-663631f0456fcc245dd835889f86541d75161c53.tar fernflower-663631f0456fcc245dd835889f86541d75161c53.tar.gz fernflower-663631f0456fcc245dd835889f86541d75161c53.tar.lz fernflower-663631f0456fcc245dd835889f86541d75161c53.tar.xz fernflower-663631f0456fcc245dd835889f86541d75161c53.zip |
java-decompiler: post-import cleanup (classes moved)
Diffstat (limited to 'src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java')
-rw-r--r-- | src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java b/src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java new file mode 100644 index 0000000..8951cd1 --- /dev/null +++ b/src/org/jetbrains/java/decompiler/struct/consts/ConstantPool.java @@ -0,0 +1,316 @@ +/* + * Fernflower - The Analytical Java Decompiler + * http://www.reversed-java.com + * + * (C) 2008 - 2010, Stiver + * + * This software is NEITHER public domain NOR free software + * as per GNU License. See license.txt for more details. + * + * This software is distributed WITHOUT ANY WARRANTY; without + * even the implied warranty of MERCHANTABILITY or FITNESS FOR + * A PARTICULAR PURPOSE. + */ + +package org.jetbrains.java.decompiler.struct.consts; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; + +import org.jetbrains.java.decompiler.code.CodeConstants; +import org.jetbrains.java.decompiler.main.DecompilerContext; +import org.jetbrains.java.decompiler.modules.renamer.PoolInterceptor; +import org.jetbrains.java.decompiler.struct.gen.FieldDescriptor; +import org.jetbrains.java.decompiler.struct.gen.MethodDescriptor; +import org.jetbrains.java.decompiler.struct.gen.VarType; + +public class ConstantPool { + + public static final int FIELD = 1; + + public static final int METHOD = 2; + + // ***************************************************************************** + // private fields + // ***************************************************************************** + + private List<PooledConstant> pool = new ArrayList<PooledConstant>(); + + private PoolInterceptor interceptor; + + // ***************************************************************************** + // constructors + // ***************************************************************************** + + public ConstantPool(DataInputStream in) throws IOException { + + int size = in.readUnsignedShort(); + + int[] pass = new int[size]; + + // first dummy constant + pool.add(null); + + // first pass: read the elements + for (int i = 1; i < size; i++) { + + byte tag = (byte)in.readUnsignedByte(); + + switch (tag) { + case CodeConstants.CONSTANT_Utf8: + pool.add(new PrimitiveConstant(CodeConstants.CONSTANT_Utf8, in.readUTF())); + break; + case CodeConstants.CONSTANT_Integer: + pool.add(new PrimitiveConstant(CodeConstants.CONSTANT_Integer, new Integer(in.readInt()))); + break; + case CodeConstants.CONSTANT_Float: + pool.add(new PrimitiveConstant(CodeConstants.CONSTANT_Float, new Float(in.readFloat()))); + break; + case CodeConstants.CONSTANT_Long: + pool.add(new PrimitiveConstant(CodeConstants.CONSTANT_Long, new Long(in.readLong()))); + pool.add(null); + i++; + break; + case CodeConstants.CONSTANT_Double: + pool.add(new PrimitiveConstant(CodeConstants.CONSTANT_Double, new Double(in.readDouble()))); + pool.add(null); + i++; + break; + case CodeConstants.CONSTANT_Class: + case CodeConstants.CONSTANT_String: + case CodeConstants.CONSTANT_MethodType: + pool.add(new PrimitiveConstant(tag, in.readUnsignedShort())); + pass[i] = 1; + break; + case CodeConstants.CONSTANT_Fieldref: + case CodeConstants.CONSTANT_Methodref: + case CodeConstants.CONSTANT_InterfaceMethodref: + case CodeConstants.CONSTANT_NameAndType: + case CodeConstants.CONSTANT_InvokeDynamic: + pool.add(new LinkConstant(tag, in.readUnsignedShort(), in.readUnsignedShort())); + if(tag == CodeConstants.CONSTANT_NameAndType) { + pass[i] = 1; + } else { + pass[i] = 2; + } + break; + case CodeConstants.CONSTANT_MethodHandle: + pool.add(new LinkConstant(tag, in.readUnsignedByte(), in.readUnsignedShort())); + pass[i] = 3; + break; + } + } + + + // resolving complex pool elements + for(int pass_index = 1; pass_index <= 3; pass_index++) { + for(int i = 1; i < size; i++) { + if(pass[i] == pass_index) { + pool.get(i).resolveConstant(this); + } + } + } + + // get global constant pool interceptor instance, if any available + interceptor = DecompilerContext.getPoolInterceptor(); + } + + // ***************************************************************************** + // public methods + // ***************************************************************************** + + public void writeToOutputStream(DataOutputStream out) throws FileNotFoundException, IOException { + + out.writeShort(pool.size()); + for(int i=1;i<pool.size();i++) { + PooledConstant cnst = (PooledConstant)pool.get(i); + if(cnst!=null) { + cnst.writeToStream(out); + } + } + } + + public static void skipPool(DataInputStream in) throws IOException { + + int size = in.readUnsignedShort(); + + for (int i = 1; i < size; i++) { + switch (in.readUnsignedByte()) { + case CodeConstants.CONSTANT_Utf8: + in.readUTF(); + break; + case CodeConstants.CONSTANT_Integer: + case CodeConstants.CONSTANT_Float: + case CodeConstants.CONSTANT_Fieldref: + case CodeConstants.CONSTANT_Methodref: + case CodeConstants.CONSTANT_InterfaceMethodref: + case CodeConstants.CONSTANT_NameAndType: + case CodeConstants.CONSTANT_InvokeDynamic: + in.skip(4); + break; + case CodeConstants.CONSTANT_Long: + case CodeConstants.CONSTANT_Double: + in.skip(8); + i++; + break; + case CodeConstants.CONSTANT_Class: + case CodeConstants.CONSTANT_String: + case CodeConstants.CONSTANT_MethodType: + in.skip(2); + break; + case CodeConstants.CONSTANT_MethodHandle: + in.skip(3); + } + } + } + + public int size() { + return pool.size(); + } + + public String[] getClassElement(int element_type, int class_index, int name_index, int descriptor_index) { + + String classname = ((PrimitiveConstant)getConstant(class_index)).getString(); + String elementname = ((PrimitiveConstant)getConstant(name_index)).getString(); + String descriptor = ((PrimitiveConstant)getConstant(descriptor_index)).getString(); + + if(interceptor != null) { + String new_element = interceptor.getName(classname+" "+elementname+" "+descriptor); + + if(new_element != null) { + elementname = new_element.split(" ")[1]; + } + + String new_descriptor = buildNewDescriptor(element_type == FIELD?CodeConstants.CONSTANT_Fieldref:CodeConstants.CONSTANT_Methodref, + descriptor); + if(new_descriptor != null) { + descriptor = new_descriptor; + } + } + + return new String[] {elementname, descriptor}; + } + + public PooledConstant getConstant(int index) { + return pool.get(index); + } + + public PrimitiveConstant getPrimitiveConstant(int index) { + PrimitiveConstant cn = (PrimitiveConstant)getConstant(index); + + if(cn != null && interceptor != null) { + if(cn.type == CodeConstants.CONSTANT_Class) { + String newname = buildNewClassname(cn.getString()); + if(newname != null) { + cn = new PrimitiveConstant(CodeConstants.CONSTANT_Class, newname); + } + } + } + + return cn; + } + + public LinkConstant getLinkConstant(int index) { + LinkConstant ln = (LinkConstant)getConstant(index); + + if(ln != null && interceptor != null) { + if(ln.type == CodeConstants.CONSTANT_Fieldref || + ln.type == CodeConstants.CONSTANT_Methodref || + ln.type == CodeConstants.CONSTANT_InterfaceMethodref) { + + String new_classname = buildNewClassname(ln.classname); + String new_element = interceptor.getName(ln.classname+" "+ln.elementname+" "+ln.descriptor); + String new_descriptor = buildNewDescriptor(ln.type, ln.descriptor); + + if(new_classname != null || new_element != null || new_descriptor != null) { + + ln = new LinkConstant(ln.type, new_classname==null?ln.classname:new_classname, + new_element==null?ln.elementname:new_element.split(" ")[1], + new_descriptor==null?ln.descriptor:new_descriptor); + } + } + } + + return ln; + } + + private String buildNewClassname(String classname) { + + VarType vt = new VarType(classname, true); + + String newname = interceptor.getName(vt.value); + if(newname != null) { + StringBuilder buffer = new StringBuilder(); + + if(vt.arraydim > 0) { + for(int i=0;i<vt.arraydim;i++) { + buffer.append("["); + } + + buffer.append("L"+newname+";"); + } else { + buffer.append(newname); + } + + return buffer.toString(); + } + + return null; + } + + private String buildNewDescriptor(int type, String descriptor) { + + boolean updated = false; + + if(type == CodeConstants.CONSTANT_Fieldref) { + FieldDescriptor fd = FieldDescriptor.parseDescriptor(descriptor); + + VarType ftype = fd.type; + if(ftype.type == CodeConstants.TYPE_OBJECT) { + String newclname = buildNewClassname(ftype.value); + if(newclname != null) { + ftype.value = newclname; + updated = true; + } + } + + if(updated) { + return fd.getDescriptor(); + } + + } else { + + MethodDescriptor md = MethodDescriptor.parseDescriptor(descriptor); + // params + for(VarType partype : md.params) { + if(partype.type == CodeConstants.TYPE_OBJECT) { + String newclname = buildNewClassname(partype.value); + if(newclname != null) { + partype.value = newclname; + updated = true; + } + } + } + + // return value + if(md.ret.type == CodeConstants.TYPE_OBJECT) { + String newclname = buildNewClassname(md.ret.value); + if(newclname!=null) { + md.ret.value = newclname; + updated = true; + } + } + + if(updated) { + return md.getDescriptor(); + } + } + + return null; + } + +} |