X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FClassGen.java;h=f4c1a0348280197667357dbba49abc43c0d9dc0d;hb=7f1eaf5d7ee54b09ffd9d91a7f8fc23803d9703a;hp=ddbf8a13697f0b72fd4dd1a788fbd4e67929b4d3;hpb=161a72a3b197b7f1c84954475aac89a7b191745d;p=org.ibex.classgen.git

diff --git a/src/org/ibex/classgen/ClassGen.java b/src/org/ibex/classgen/ClassGen.java
index ddbf8a1..f4c1a03 100644
--- a/src/org/ibex/classgen/ClassGen.java
+++ b/src/org/ibex/classgen/ClassGen.java
@@ -8,6 +8,8 @@ public class ClassGen implements CGConst {
     private final Type.Object thisType;
     private final Type.Object superType;
     private final Type.Object[] interfaces;
+    private short minor;
+    private short major;
     final int flags;
     
     private String sourceFile; 
@@ -16,15 +18,56 @@ public class ClassGen implements CGConst {
     
     final CPGen cp;
     private final AttrGen attributes;
-    
-    /** @see #ClassGen(Type.Object,Type.Object,int) */
+
+    public static String flagsToString(int flags) {
+        String ret = "";
+        if ((flags & ACC_PUBLIC) != 0)       ret += "public ";
+        if ((flags & ACC_PRIVATE) != 0)      ret += "private ";
+        if ((flags & ACC_PROTECTED) != 0)    ret += "protected ";
+        if ((flags & ACC_STATIC) != 0)       ret += "static ";
+        if ((flags & ACC_FINAL) != 0)        ret += "final ";
+        if ((flags & ACC_ABSTRACT) != 0)     ret += "abstract ";
+        if ((flags & ACC_SYNCHRONIZED) != 0) ret += "synchronized ";
+        if ((flags & ACC_NATIVE) != 0)       ret += "native ";
+        if ((flags & ACC_STRICT) != 0)       ret += "strictfp ";
+        if ((flags & ACC_VOLATILE) != 0)     ret += "volatile ";
+        if ((flags & ACC_TRANSIENT) != 0)    ret += "transient ";
+        return ret;
+    }
+  
+    public String toString() { StringBuffer sb = new StringBuffer(); toString(sb); return sb.toString(); }
+    public void   toString(StringBuffer sb) {
+        sb.append(flagsToString(flags));
+        sb.append((flags & ACC_INTERFACE) != 0 ? "interface " : "class ");
+        sb.append(thisType.humanReadable());
+        if (superType != null) sb.append(" extends " + superType.humanReadable());
+        if (interfaces != null && interfaces.length > 0) sb.append(" implements");
+        for(int i=0; i<interfaces.length; i++) sb.append((i==0?" ":", ")+interfaces[i].humanReadable());
+        sb.append(" {");
+        sb.append(" // [jcf v"+major+"."+minor+"]");
+        if (sourceFile != null) sb.append(" from " + sourceFile);
+        sb.append("\n");
+        for(int i=0; i<fields.size(); i++) {
+            sb.append("  ");
+            ((FieldGen)fields.elementAt(i)).toString(sb);
+            sb.append("\n");
+        }
+        for(int i=0; i<methods.size(); i++) {
+            sb.append("  ");
+            ((MethodGen)methods.elementAt(i)).toString(sb, thisType.getShortName());
+            sb.append("\n");
+        }
+        sb.append("}");
+    }
+
+    /** @see #ClassGen(Type.Object, Type.Object, int) */
     public ClassGen(String name, String superName, int flags) {
-        this(new Type.Object(name),new Type.Object(superName),flags);
+        this(Type.fromDescriptor(name).asObject(), Type.fromDescriptor(superName).asObject(), flags);
     }
 
-    /** @see #ClassGen(Type.Object,Type.Object,int,Type.Object[]) */
-    public ClassGen(Type.Object thisType,Type.Object superType, int flags) {
-        this(thisType,superType,flags,null);
+    /** @see #ClassGen(Type.Object, Type.Object, int, Type.Object[]) */
+    public ClassGen(Type.Object thisType, Type.Object superType, int flags) {
+        this(thisType, superType, flags, null);
     }
     
     /** Creates a new ClassGen object 
@@ -32,13 +75,15 @@ public class ClassGen implements CGConst {
         @param superType The superclass of the generated class (commonly Type.OBJECT) 
         @param flags The access flags for this class (ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, and ACC_ABSTRACT)
     */
-    public ClassGen(Type.Object thisType,Type.Object superType, int flags, Type.Object[] interfaces) {
+    public ClassGen(Type.Object thisType, Type.Object superType, int flags, Type.Object[] interfaces) {
         if((flags & ~(ACC_PUBLIC|ACC_FINAL|ACC_SUPER|ACC_INTERFACE|ACC_ABSTRACT)) != 0)
             throw new IllegalArgumentException("invalid flags");
         this.thisType = thisType;
         this.superType = superType;
         this.interfaces = interfaces;
         this.flags = flags;
+        this.minor = 3;
+        this.major = 45;
         
         cp = new CPGen();
         attributes = new AttrGen(cp);
@@ -56,7 +101,7 @@ public class ClassGen implements CGConst {
         @see CGConst
     */
     public final MethodGen addMethod(String name, Type ret, Type[] args, int flags) {
-        MethodGen mg = new MethodGen(this,name,ret,args,flags);
+        MethodGen mg = new MethodGen(this, name, ret, args, flags);
         methods.addElement(mg);
         return mg;
     }
@@ -72,7 +117,7 @@ public class ClassGen implements CGConst {
         @see CGConst
         */  
     public final FieldGen addField(String name, Type type, int flags) {
-        FieldGen fg = new FieldGen(this,name,type,flags);
+        FieldGen fg = new FieldGen(this, name, type, flags);
         fields.addElement(fg);
         return fg;
     }
@@ -96,12 +141,14 @@ public class ClassGen implements CGConst {
             String[] a = thisType.components();
             int i;
             for(i=0;i<a.length-1;i++) {
-                f = new File(f,a[i]);
+                f = new File(f, a[i]);
                 f.mkdir();
             }
-            f = new File(f,a[i] + ".class");
+            f = new File(f, a[i] + ".class");
         }
-        dump(new FileOutputStream(f));
+        OutputStream os = new FileOutputStream(f);
+        dump(os);
+        os.close();
     }
    
     /** Writes the classfile data to the outputstream specified
@@ -123,7 +170,7 @@ public class ClassGen implements CGConst {
         cp.add(thisType);
         cp.add(superType);
         if(interfaces != null) for(int i=0;i<interfaces.length;i++) cp.add(interfaces[i]);
-        if(sourceFile != null && !attributes.contains("SourceFile")) attributes.add("SourceFile",cp.addUtf8(sourceFile));
+        if(sourceFile != null && !attributes.contains("SourceFile")) attributes.add("SourceFile", cp.addUtf8(sourceFile));
                 
         for(int i=0;i<methods.size();i++) ((MethodGen)methods.elementAt(i)).finish();
         for(int i=0;i<fields.size();i++) ((FieldGen)fields.elementAt(i)).finish();
@@ -131,10 +178,9 @@ public class ClassGen implements CGConst {
         cp.seal();
         
         o.writeInt(0xcafebabe); // magic
-        o.writeShort(3); // minor_version
-        o.writeShort(45); // major_version
+        o.writeShort(minor); // minor_version
+        o.writeShort(major); // major_version
         
-        o.writeShort(cp.slots()); // constant_pool_count
         cp.dump(o); // constant_pool
         
         o.writeShort(flags);
@@ -154,12 +200,48 @@ public class ClassGen implements CGConst {
         attributes.dump(o); // attributes        
     }
     
+    public ClassGen read(File f) throws ClassReadExn, IOException {
+        InputStream is = new FileInputStream(f);
+        ClassGen ret = read(is);
+        is.close();
+        return ret;
+    }
+    
+    public ClassGen read(InputStream is) throws ClassReadExn, IOException {
+        return new ClassGen(new DataInputStream(new BufferedInputStream(is)));
+    }
+
+    ClassGen(DataInput i) throws ClassReadExn, IOException {
+        int magic = i.readInt();
+        if (magic != 0xcafebabe) throw new ClassReadExn("invalid magic: " + Long.toString(0xffffffffL & magic, 16));
+        minor = i.readShort();
+        //if (minor != 3) throw new ClassReadExn("invalid minor version: " + minor);
+        major = i.readShort();
+        //if (major != 45 && major != 46) throw new ClassReadExn("invalid major version");
+        cp = new CPGen(i);
+        flags = i.readShort();
+        thisType = (Type.Object)cp.getType(i.readShort());
+        superType = (Type.Object)cp.getType(i.readShort());
+        interfaces = new Type.Object[i.readShort()];
+        for(int j=0; j<interfaces.length; j++) interfaces[j] = (Type.Object)cp.getType(i.readShort());
+        int numFields = i.readShort();
+        for(int j=0; j<numFields; j++) fields.add(new FieldGen(cp, i));
+        int numMethods = i.readShort();
+        for(int j=0; j<numMethods; j++) methods.add(new MethodGen(cp, i));
+        attributes = new AttrGen(cp, i);
+        sourceFile = (String)attributes.get("SourceFile");
+    }
+    
     /** Thrown when class generation fails for a reason not under the control of the user
         (IllegalStateExceptions are thrown in those cases */
     public static class Exn extends RuntimeException {
         public Exn(String s) { super(s); }
     }
     
+    public static class ClassReadExn extends IOException {
+        public ClassReadExn(String s) { super(s); }
+    }
+    
     /** A class representing a field or method reference. This is used as an argument to the INVOKE*, GET*, and PUT* bytecodes
         @see MethodRef
         @see FieldRef
@@ -185,13 +267,38 @@ public class ClassGen implements CGConst {
         private final CPGen cp;
         private final Hashtable ht = new Hashtable();
         
-        public AttrGen(CPGen cp) {
-            this.cp = cp;
+        public AttrGen(CPGen cp) { this.cp = cp; }
+        public AttrGen(CPGen cp, DataInput in) throws IOException {
+            this(cp);
+            int size = in.readShort();
+            for(int i=0; i<size; i++) {
+                String name = null;
+                int idx = in.readShort();
+                CPGen.Ent e = cp.getByIndex(idx);
+                Object key = e.key();
+                if (key instanceof String) name = (String)key;
+                else name = ((Type)key).getDescriptor();
+
+                int length = in.readInt();
+                if (length==2) {   // FIXME might be wrong assumption
+                    ht.put(name, cp.getByIndex(in.readShort()));
+                } else {
+                    byte[] buf = new byte[length];
+                    in.readFully(buf);
+                    ht.put(name, buf);
+                }
+            }
+        }
+
+        public Object get(String s) {
+            Object ret = ht.get(s);
+            if (ret instanceof CPGen.Utf8Ent) return ((CPGen.Utf8Ent)ret).s;
+            return ret;
         }
         
         public void add(String s, Object data) {
             cp.addUtf8(s);
-            ht.put(s,data);
+            ht.put(s, data);
         }
         
         public boolean contains(String s) { return ht.get(s) != null; }
@@ -217,31 +324,43 @@ public class ClassGen implements CGConst {
         }
     }
     
-    /*public static void main(String[] args) throws Exception {
-        Type.Object me = new Type.Object("Test");
-        ClassGen cg = new ClassGen("Test","java.lang.Object",ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
-        FieldGen fg = cg.addField("foo",Type.INT,ACC_PUBLIC|ACC_STATIC);
-        
-        MethodGen mg = cg.addMethod("main",Type.VOID,new Type[]{Type.arrayType(Type.STRING)},ACC_STATIC|ACC_PUBLIC);
-        mg.setMaxLocals(1);
-        mg.addPushConst(0);
-        //mg.add(ISTORE_0);
-        mg.add(PUTSTATIC, fieldRef(me,"foo",Type.INT));
-        int top = mg.size();
-        mg.add(GETSTATIC,cg.fieldRef(new Type.Object("java.lang.System"),"out",new Type.Object("java.io.PrintStream")));
-        //mg.add(ILOAD_0);
-        mg.add(GETSTATIC,cg.fieldRef(me,"foo",Type.INT));
-        mg.add(INVOKEVIRTUAL,cg.methodRef(new Type.Object("java.io.PrintStream"),"println",Type.VOID, new Type[]{Type.INT}));
-        //mg.add(IINC,new int[]{0,1});
-        //mg.add(ILOAD_0);
-        mg.add(GETSTATIC,cg.fieldRef(me,"foo",Type.INT));
-        mg.addPushConst(1);
-        mg.add(IADD);
-        mg.add(DUP);
-        mg.add(PUTSTATIC,cg.fieldRef(me,"foo",Type.INT));       
-        mg.addPushConst(10);
-        mg.add(IF_ICMPLT,top);
-        mg.add(RETURN);
-        cg.dump("Test.class");
-    }*/
+    public static void main(String[] args) throws Exception {
+        if (args.length==1) {
+            if (args[0].endsWith(".class")) {
+                System.out.println(new ClassGen(new DataInputStream(new FileInputStream(args[0]))));
+            } else {
+                InputStream is = Class.forName(args[0]).getClassLoader().getResourceAsStream(args[0].replace('.', '/')+".class");
+                System.out.println(new ClassGen(new DataInputStream(is)));
+            }
+        } else {
+            /*
+            Type.Object me = new Type.Object("Test");
+            ClassGen cg = new ClassGen("Test", "java.lang.Object", ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
+            FieldGen fg = cg.addField("foo", Type.INT, ACC_PUBLIC|ACC_STATIC);
+        
+            MethodGen mg = cg.addMethod("main", Type.VOID, new Type[]{Type.arrayType(Type.STRING)}, ACC_STATIC|ACC_PUBLIC);
+            mg.setMaxLocals(1);
+            mg.addPushConst(0);
+            //mg.add(ISTORE_0);
+            mg.add(PUTSTATIC, fieldRef(me, "foo", Type.INT));
+            int top = mg.size();
+            mg.add(GETSTATIC, cg.fieldRef(new Type.Object("java.lang.System"), "out", new Type.Object("java.io.PrintStream")));
+            //mg.add(ILOAD_0);
+            mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
+            mg.add(INVOKEVIRTUAL, cg.methodRef(new Type.Object("java.io.PrintStream"), "println",
+                                               Type.VOID, new Type[]{Type.INT}));
+            //mg.add(IINC, new int[]{0, 1});
+            //mg.add(ILOAD_0);
+            mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
+            mg.addPushConst(1);
+            mg.add(IADD);
+            mg.add(DUP);
+            mg.add(PUTSTATIC, cg.fieldRef(me, "foo", Type.INT));       
+            mg.addPushConst(10);
+            mg.add(IF_ICMPLT, top);
+            mg.add(RETURN);
+            cg.dump("Test.class");
+            */
+        }
+    }
 }