/*

 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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.

 *

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "classfile/systemDictionary.hpp"

#include "classfile/vmSymbols.hpp"

#include "memory/resourceArea.hpp"

#include "memory/universe.inline.hpp"

#include "oops/instanceKlass.hpp"

#include "runtime/fieldDescriptor.hpp"

#include "runtime/handles.inline.hpp"

#include "runtime/signature.hpp"

oop fieldDescriptor::loader() const {

  return instanceKlass::cast(_cp->pool_holder())->class_loader();

}

typeArrayOop fieldDescriptor::annotations() const {

  instanceKlass* ik = instanceKlass::cast(field_holder());

  objArrayOop md = ik->fields_annotations();

  if (md == NULL)

    return NULL;

  assert((index() % instanceKlass::next_offset) == 0, "");

  return typeArrayOop(md->obj_at(index() / instanceKlass::next_offset));

}

constantTag fieldDescriptor::initial_value_tag() const {

  return constants()->tag_at(_initial_value_index);

}

jint fieldDescriptor::int_initial_value() const {

  return constants()->int_at(_initial_value_index);

}

jlong fieldDescriptor::long_initial_value() const {

  return constants()->long_at(_initial_value_index);

}

jfloat fieldDescriptor::float_initial_value() const {

  return constants()->float_at(_initial_value_index);

}

jdouble fieldDescriptor::double_initial_value() const {

  return constants()->double_at(_initial_value_index);

}

oop fieldDescriptor::string_initial_value(TRAPS) const {

  return constants()->string_at(_initial_value_index, CHECK_0);

}

void fieldDescriptor::initialize(klassOop k, int index) {

  instanceKlass* ik = instanceKlass::cast(k);

  _cp = ik->constants();

  typeArrayOop fields = ik->fields();

  assert(fields->length() % instanceKlass::next_offset == 0, "Illegal size of field array");

  assert(fields->length() >= index + instanceKlass::next_offset, "Illegal size of field array");

  _access_flags.set_field_flags(fields->ushort_at(index + instanceKlass::access_flags_offset));

  _name_index = fields->ushort_at(index + instanceKlass::name_index_offset);

  _signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);

  _initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);

  guarantee(_name_index != 0 && _signature_index != 0, "bad constant pool index for fieldDescriptor");

  _offset = ik->offset_from_fields( index );

  _generic_signature_index = fields->ushort_at(index + instanceKlass::generic_signature_offset);

  _index = index;

}

#ifndef PRODUCT

void fieldDescriptor::print_on(outputStream* st) const {

  _access_flags.print_on(st);

  constants()->symbol_at(_name_index)->print_value_on(st);

  st->print(" ");

  constants()->symbol_at(_signature_index)->print_value_on(st);

  st->print(" @%d ", offset());

  if (WizardMode && has_initial_value()) {

    st->print("(initval ");

    constantTag t = initial_value_tag();

    if (t.is_int()) {

      st->print("int %d)", int_initial_value());

    } else if (t.is_long()){

      st->print_jlong(long_initial_value());

    } else if (t.is_float()){

      st->print("float %f)", float_initial_value());

    } else if (t.is_double()){

      st->print("double %lf)", double_initial_value());

    }

  }

}

void fieldDescriptor::print_on_for(outputStream* st, oop obj) {

  print_on(st);

  BasicType ft = field_type();

  jint as_int = 0;

  switch (ft) {

    case T_BYTE:

      as_int = (jint)obj->byte_field(offset());

      st->print(" %d", obj->byte_field(offset()));

      break;

    case T_CHAR:

      as_int = (jint)obj->char_field(offset());

      {

        jchar c = obj->char_field(offset());

        as_int = c;

        st->print(" %c %d", isprint(c) ? c : ' ', c);

      }

      break;

    case T_DOUBLE:

      st->print(" %lf", obj->double_field(offset()));

      break;

    case T_FLOAT:

      as_int = obj->int_field(offset());

      st->print(" %f", obj->float_field(offset()));

      break;

    case T_INT:

      as_int = obj->int_field(offset());

      st->print(" %d", obj->int_field(offset()));

      break;

    case T_LONG:

      st->print(" ");

      st->print_jlong(obj->long_field(offset()));

      break;

    case T_SHORT:

      as_int = obj->short_field(offset());

      st->print(" %d", obj->short_field(offset()));

      break;

    case T_BOOLEAN:

      as_int = obj->bool_field(offset());

      st->print(" %s", obj->bool_field(offset()) ? "true" : "false");

      break;

    case T_ARRAY:

      st->print(" ");

      NOT_LP64(as_int = obj->int_field(offset()));

      obj->obj_field(offset())->print_value_on(st);

      break;

    case T_OBJECT:

      st->print(" ");

      NOT_LP64(as_int = obj->int_field(offset()));

      obj->obj_field(offset())->print_value_on(st);

      break;

    default:

      ShouldNotReachHere();

      break;

  }

  // Print a hint as to the underlying integer representation. This can be wrong for

  // pointers on an LP64 machine

  if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {

    st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));

  } else if (as_int < 0 || as_int > 9) {

    st->print(" (%x)", as_int);

  }

}

#endif /* PRODUCT */