/*

 * Copyright (c) 1999, 2011, 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 "ci/ciSymbol.hpp"

#include "ci/ciUtilities.hpp"

#include "memory/oopFactory.hpp"

// ------------------------------------------------------------------

// ciSymbol::ciSymbol

//

// Preallocated symbol variant.  Used with symbols from vmSymbols.

ciSymbol::ciSymbol(Symbol* s, vmSymbols::SID sid)

  : _symbol(s), _sid(sid)

{

  assert(_symbol != NULL, "adding null symbol");

  _symbol->increment_refcount();  // increment ref count

  assert(sid_ok(), "must be in vmSymbols");

}

// Normal case for non-famous symbols.

ciSymbol::ciSymbol(Symbol* s)

  : _symbol(s), _sid(vmSymbols::NO_SID)

{

  assert(_symbol != NULL, "adding null symbol");

  _symbol->increment_refcount();  // increment ref count

  assert(sid_ok(), "must not be in vmSymbols");

}

// ciSymbol

//

// This class represents a Symbol* in the HotSpot virtual

// machine.

// ------------------------------------------------------------------

// ciSymbol::as_utf8

//

// The text of the symbol as a null-terminated C string.

const char* ciSymbol::as_utf8() {

  VM_QUICK_ENTRY_MARK;

  Symbol* s = get_symbol();

  return s->as_utf8();

}

// ------------------------------------------------------------------

// ciSymbol::base

const jbyte* ciSymbol::base() {

  GUARDED_VM_ENTRY(return get_symbol()->base();)

}

// ------------------------------------------------------------------

// ciSymbol::byte_at

int ciSymbol::byte_at(int i) {

  GUARDED_VM_ENTRY(return get_symbol()->byte_at(i);)

}

// ------------------------------------------------------------------

// ciSymbol::starts_with

//

// Tests if the symbol starts with the given prefix.

bool ciSymbol::starts_with(const char* prefix, int len) const {

  GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);)

}

// ------------------------------------------------------------------

// ciSymbol::index_of

//

// Determines where the symbol contains the given substring.

int ciSymbol::index_of_at(int i, const char* str, int len) const {

  GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);)

}

// ------------------------------------------------------------------

// ciSymbol::utf8_length

int ciSymbol::utf8_length() {

  GUARDED_VM_ENTRY(return get_symbol()->utf8_length();)

}

// ------------------------------------------------------------------

// ciSymbol::print_impl

//

// Implementation of the print method

void ciSymbol::print_impl(outputStream* st) {

  st->print(" value=");

  print_symbol_on(st);

}

// ------------------------------------------------------------------

// ciSymbol::print_symbol_on

//

// Print the value of this symbol on an outputStream

void ciSymbol::print_symbol_on(outputStream *st) {

  GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);)

}

// ------------------------------------------------------------------

// ciSymbol::make_impl

//

// Make a ciSymbol from a C string (implementation).

ciSymbol* ciSymbol::make_impl(const char* s) {

  EXCEPTION_CONTEXT;

  TempNewSymbol sym = SymbolTable::new_symbol(s, THREAD);

  if (HAS_PENDING_EXCEPTION) {

    CLEAR_PENDING_EXCEPTION;

    CURRENT_THREAD_ENV->record_out_of_memory_failure();

    return ciEnv::_unloaded_cisymbol;

  }

  return CURRENT_THREAD_ENV->get_symbol(sym);

}

// ------------------------------------------------------------------

// ciSymbol::make

//

// Make a ciSymbol from a C string.

ciSymbol* ciSymbol::make(const char* s) {

  GUARDED_VM_ENTRY(return make_impl(s);)

}