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/code/InstructionSequence.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/code/InstructionSequence.java')
-rw-r--r-- | src/org/jetbrains/java/decompiler/code/InstructionSequence.java | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/org/jetbrains/java/decompiler/code/InstructionSequence.java b/src/org/jetbrains/java/decompiler/code/InstructionSequence.java new file mode 100644 index 0000000..4c29820 --- /dev/null +++ b/src/org/jetbrains/java/decompiler/code/InstructionSequence.java @@ -0,0 +1,219 @@ +/* + * 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.code; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; + +import org.jetbrains.java.decompiler.code.interpreter.Util; +import org.jetbrains.java.decompiler.main.DecompilerContext; +import org.jetbrains.java.decompiler.struct.StructContext; +import org.jetbrains.java.decompiler.util.InterpreterUtil; +import org.jetbrains.java.decompiler.util.VBStyleCollection; + + +public abstract class InstructionSequence { + + // ***************************************************************************** + // private fields + // ***************************************************************************** + + protected VBStyleCollection<Instruction, Integer> collinstr = new VBStyleCollection<Instruction, Integer>(); + + protected int pointer = 0; + + protected ExceptionTable exceptionTable = new ExceptionTable(); + + // ***************************************************************************** + // public methods + // ***************************************************************************** + + // to nbe overwritten + public InstructionSequence clone() {return null;} + + public void clear() { + collinstr.clear(); + pointer = 0; + exceptionTable = new ExceptionTable(); + } + + public void addInstruction(Instruction inst, int offset){ + collinstr.addWithKey(inst, offset); + } + + public void addInstruction(int index, Instruction inst, int offset){ + collinstr.addWithKeyAndIndex(index, inst, offset); + } + + public void addSequence(InstructionSequence seq){ + for(int i=0;i<seq.length();i++) { + addInstruction(seq.getInstr(i), -1); // TODO: any sensible value possible? + } + } + + public void removeInstruction(int index) { + collinstr.remove(index); + } + + public Instruction getCurrentInstr() { + return (Instruction)collinstr.get(pointer); + } + + public Instruction getInstr(int index) { + return (Instruction)collinstr.get(index); + } + + public Instruction getLastInstr() { + return (Instruction)collinstr.getLast(); + } + + public int getCurrentOffset() { + return ((Integer)collinstr.getKey(pointer)).intValue(); + } + + public int getOffset(int index) { + return ((Integer)collinstr.getKey(index)).intValue(); + } + + public int getPointerByAbsOffset(int offset) { + Integer absoffset = new Integer(offset); + if(collinstr.containsKey(absoffset)) { + return collinstr.getIndexByKey(absoffset); + } else { + return -1; + } + } + + public int getPointerByRelOffset(int offset) { + Integer absoffset = new Integer(((Integer)collinstr.getKey(pointer)).intValue()+offset); + if(collinstr.containsKey(absoffset)) { + return collinstr.getIndexByKey(absoffset); + } else { + return -1; + } + } + + public void setPointerByAbsOffset(int offset) { + Integer absoffset = new Integer(((Integer)collinstr.getKey(pointer)).intValue()+offset); + if(collinstr.containsKey(absoffset)) { + pointer = collinstr.getIndexByKey(absoffset); + } + } + + public int length() { + return collinstr.size(); + } + + public boolean isEmpty() { + return collinstr.isEmpty(); + } + + public void addToPointer(int diff) { + this.pointer += diff; + } + + public String toString() { + return toString(0); + } + + public String toString(int indent) { + + String new_line_separator = DecompilerContext.getNewLineSeparator(); + + StringBuffer buf = new StringBuffer(); + + for(int i=0;i<collinstr.size();i++) { + buf.append(InterpreterUtil.getIndentString(indent)); + buf.append(((Integer)collinstr.getKey(i)).intValue()); + buf.append(": "); + buf.append(((Instruction)collinstr.get(i)).toString()); + buf.append(new_line_separator); + } + + return buf.toString(); + } + + public void writeCodeToStream(DataOutputStream out) throws IOException { + + for(int i=0;i<collinstr.size();i++) { + ((Instruction)collinstr.get(i)).writeToStream(out, ((Integer)collinstr.getKey(i)).intValue()); + } + } + + public void writeExceptionsToStream(DataOutputStream out) throws IOException { + + List<ExceptionHandler> handlers = exceptionTable.getHandlers(); + + out.writeShort(handlers.size()); + for(int i=0;i<handlers.size();i++) { + ((ExceptionHandler)handlers.get(i)).writeToStream(out); + } + } + + public void sortHandlers(final StructContext context) { + + Collections.sort(exceptionTable.getHandlers(), new Comparator<ExceptionHandler>() { + + public int compare(ExceptionHandler handler0, ExceptionHandler handler1) { + + if(handler0.to == handler1.to) { + if(handler0.exceptionClass == null) { + return 1; + } else { + if(handler1.exceptionClass == null) { + return -1; + } else if(handler0.exceptionClass.equals(handler1.exceptionClass)){ + return (handler0.from > handler1.from)?-1:1; // invalid code + } else { + if(Util.instanceOf(context, handler0.exceptionClass, handler1.exceptionClass)) { + return -1; + } else { + return 1; + } + } + } + } else { + return (handler0.to > handler1.to)?1:-1; + } + } + }); + + } + + + // ***************************************************************************** + // getter and setter methods + // ***************************************************************************** + + public int getPointer() { + return pointer; + } + + public void setPointer(int pointer) { + this.pointer = pointer; + } + + public ExceptionTable getExceptionTable() { + return exceptionTable; + } + + public void setExceptionTable(ExceptionTable exceptionTable) { + this.exceptionTable = exceptionTable; + } + +} |