jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/Descriptor.java@cd0630109de5 (annotated)

src/share/classes/com/sun/tools/classfile/Descriptor.java@cd0630109de5 (annotated)

src/share/classes/com/sun/tools/classfile/Descriptor.java

Tue, 19 May 2009 11:50:54 -0700

author: jjg
date: Tue, 19 May 2009 11:50:54 -0700
changeset 283: cd0630109de5
parent 229: 03bcd66bd8e7
child 554: 9d9f26857129
permissions: -rw-r--r--

6824493: experimental support for additional info for instructions
Reviewed-by: mcimadamore

 /*
  * Copyright 2007-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code 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
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.classfile;
 import java.io.IOException;
 /**
  * See JVMS3, section 4.4.
  *
  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
  *  you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class Descriptor {
     public class InvalidDescriptor extends DescriptorException {
         private static final long serialVersionUID = 1L;
         InvalidDescriptor(String desc) {
             this.desc = desc;
             this.index = -1;
         }
         InvalidDescriptor(String desc, int index) {
             this.desc = desc;
             this.index = index;
         }
         @Override
         public String getMessage() {
             // i18n
             if (index == -1)
                 return "invalid descriptor \"" + desc + "\"";
             else
                 return "descriptor is invalid at offset " + index + " in \"" + desc + "\"";
         }
         public final String desc;
         public final int index;
     }
     public Descriptor(ClassReader cr) throws IOException {
         this(cr.readUnsignedShort());
     }
     public Descriptor(int index) {
         this.index = index;
     }
     public String getValue(ConstantPool constant_pool) throws ConstantPoolException {
         return constant_pool.getUTF8Value(index);
     }
     public int getParameterCount(ConstantPool constant_pool)
             throws ConstantPoolException, InvalidDescriptor {
         String desc = getValue(constant_pool);
         int end = desc.indexOf(")");
         if (end == -1)
             throw new InvalidDescriptor(desc);
         parse(desc, 0, end + 1);
         return count;
     }
     public String getParameterTypes(ConstantPool constant_pool)
             throws ConstantPoolException, InvalidDescriptor {
         String desc = getValue(constant_pool);
         int end = desc.indexOf(")");
         if (end == -1)
             throw new InvalidDescriptor(desc);
         return parse(desc, 0, end + 1);
     }
     public String getReturnType(ConstantPool constant_pool)
             throws ConstantPoolException, InvalidDescriptor {
         String desc = getValue(constant_pool);
         int end = desc.indexOf(")");
         if (end == -1)
             throw new InvalidDescriptor(desc);
         return parse(desc, end + 1, desc.length());
     }
     public String getFieldType(ConstantPool constant_pool)
             throws ConstantPoolException, InvalidDescriptor {
         String desc = getValue(constant_pool);
         return parse(desc, 0, desc.length());
     }
     private String parse(String desc, int start, int end)
             throws InvalidDescriptor {
         int p = start;
         StringBuffer sb = new StringBuffer();
         int dims = 0;
         count = 0;
         while (p < end) {
             String type;
             char ch;
             switch (ch = desc.charAt(p++)) {
                 case '(':
                     sb.append('(');
                     continue;
                 case ')':
                     sb.append(')');
                     continue;
                 case '[':
                     dims++;
                     continue;
                 case 'B':
                     type = "byte";
                     break;
                 case 'C':
                     type = "char";
                     break;
                 case 'D':
                     type = "double";
                     break;
                 case 'F':
                     type = "float";
                     break;
                 case 'I':
                     type = "int";
                     break;
                 case 'J':
                     type = "long";
                     break;
                 case 'L':
                     int sep = desc.indexOf(';', p);
                     if (sep == -1)
                         throw new InvalidDescriptor(desc, p - 1);
                     type = desc.substring(p, sep).replace('/', '.');
                     p = sep + 1;
                     break;
                 case 'S':
                     type = "short";
                     break;
                 case 'Z':
                     type = "boolean";
                     break;
                 case 'V':
                     type = "void";
                     break;
                 default:
                     throw new InvalidDescriptor(desc, p - 1);
             }
             if (sb.length() > 1 && sb.charAt(0) == '(')
                 sb.append(", ");
             sb.append(type);
             for ( ; dims > 0; dims-- )
                 sb.append("[]");
             count++;
         }
         return sb.toString();
     }
     public final int index;
     private int count;
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/classfile/Descriptor.java@cd0630109de5 (annotated)

src/share/classes/com/sun/tools/classfile/Descriptor.java