duke@435: /*
xdono@905:  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // constant tags in Java .class files
duke@435: 
duke@435: 
duke@435: enum {
duke@435:   // See jvm.h for shared JVM_CONSTANT_XXX tags
duke@435:   // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
duke@435:   // Hotspot specific tags
duke@435:   JVM_CONSTANT_Invalid                  = 0,    // For bad value initialization
duke@435:   JVM_CONSTANT_InternalMin              = 100,  // First implementation tag (aside from bad value of course)
duke@435:   JVM_CONSTANT_UnresolvedClass          = 100,  // Temporary tag until actual use
duke@435:   JVM_CONSTANT_ClassIndex               = 101,  // Temporary tag while constructing constant pool
duke@435:   JVM_CONSTANT_UnresolvedString         = 102,  // Temporary tag until actual use
duke@435:   JVM_CONSTANT_StringIndex              = 103,  // Temporary tag while constructing constant pool
duke@435:   JVM_CONSTANT_UnresolvedClassInError   = 104,  // Error tag due to resolution error
twisti@1573:   JVM_CONSTANT_Object                   = 105,  // Required for BoundMethodHandle arguments.
twisti@1573:   JVM_CONSTANT_InternalMax              = 105   // Last implementation tag
duke@435: };
duke@435: 
duke@435: 
duke@435: class constantTag VALUE_OBJ_CLASS_SPEC {
duke@435:  private:
duke@435:   jbyte _tag;
duke@435:  public:
duke@435:   bool is_klass() const             { return _tag == JVM_CONSTANT_Class; }
duke@435:   bool is_field () const            { return _tag == JVM_CONSTANT_Fieldref; }
duke@435:   bool is_method() const            { return _tag == JVM_CONSTANT_Methodref; }
duke@435:   bool is_interface_method() const  { return _tag == JVM_CONSTANT_InterfaceMethodref; }
duke@435:   bool is_string() const            { return _tag == JVM_CONSTANT_String; }
duke@435:   bool is_int() const               { return _tag == JVM_CONSTANT_Integer; }
duke@435:   bool is_float() const             { return _tag == JVM_CONSTANT_Float; }
duke@435:   bool is_long() const              { return _tag == JVM_CONSTANT_Long; }
duke@435:   bool is_double() const            { return _tag == JVM_CONSTANT_Double; }
duke@435:   bool is_name_and_type() const     { return _tag == JVM_CONSTANT_NameAndType; }
duke@435:   bool is_utf8() const              { return _tag == JVM_CONSTANT_Utf8; }
duke@435: 
duke@435:   bool is_invalid() const           { return _tag == JVM_CONSTANT_Invalid; }
duke@435: 
duke@435:   bool is_unresolved_klass() const {
duke@435:     return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
duke@435:   }
duke@435: 
duke@435:   bool is_unresolved_klass_in_error() const {
duke@435:     return _tag == JVM_CONSTANT_UnresolvedClassInError;
duke@435:   }
duke@435: 
duke@435:   bool is_klass_index() const       { return _tag == JVM_CONSTANT_ClassIndex; }
duke@435:   bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; }
duke@435:   bool is_string_index() const      { return _tag == JVM_CONSTANT_StringIndex; }
duke@435: 
twisti@1573:   bool is_object() const            { return _tag == JVM_CONSTANT_Object; }
twisti@1573: 
duke@435:   bool is_klass_reference() const   { return is_klass_index() || is_unresolved_klass(); }
jrose@866:   bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }
duke@435:   bool is_field_or_method() const   { return is_field() || is_method() || is_interface_method(); }
duke@435:   bool is_symbol() const            { return is_utf8(); }
duke@435: 
duke@435:   constantTag(jbyte tag) {
duke@435:     assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
duke@435:            (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
duke@435:     _tag = tag;
duke@435:   }
duke@435: 
duke@435:   jbyte value()                      { return _tag; }
duke@435: 
duke@435:   void print_on(outputStream* st) const PRODUCT_RETURN;
duke@435: };