/*

 * 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 "code/debugInfo.hpp"

#include "code/location.hpp"

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

  if(type() == invalid) {

    // product of Location::invalid_loc() or Location::Location().

    switch (where()) {

    case on_stack:     st->print("empty");    break;

    case in_register:  st->print("invalid");  break;

    }

    return;

  }

  switch (where()) {

  case on_stack:    st->print("stack[%d]", stack_offset());    break;

  case in_register: st->print("reg %s [%d]", reg()->name(), register_number()); break;

  default:          st->print("Wrong location where %d", where());

  }

  switch (type()) {

  case normal:                                 break;

  case oop:          st->print(",oop");        break;

  case narrowoop:    st->print(",narrowoop");  break;

  case int_in_long:  st->print(",int");        break;

  case lng:          st->print(",long");       break;

  case float_in_dbl: st->print(",float");      break;

  case dbl:          st->print(",double");     break;

  case addr:         st->print(",address");    break;

  default:           st->print("Wrong location type %d", type());

  }

}

Location::Location(DebugInfoReadStream* stream) {

  _value = (juint) stream->read_int();

}

void Location::write_on(DebugInfoWriteStream* stream) {

  stream->write_int(_value);

}

// Valid argument to Location::new_stk_loc()?

bool Location::legal_offset_in_bytes(int offset_in_bytes) {

  if ((offset_in_bytes % BytesPerInt) != 0)  return false;

  return (juint)(offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);

}