hxdeque.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:5k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h"
- #include "hxassert.h"
- #include "carray.h"
- #include "hxdeque.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- const u_long32 HX_deque::INVALID_INDEX = 0xffffffff;
- const u_long32 HX_deque::INITIAL_ALLOCATION = 50;
- HX_deque::HX_deque(u_long32 initial_allocation)
- :
- array(0),
- num_items(0)
- {
- init(initial_allocation);
- }
- HX_deque::~HX_deque()
- {
- delete array;
- }
- void
- HX_deque::init(u_long32 initial_allocation)
- {
- array = new CHXPtrArray();
- array->SetSize(HX_SAFEINT(initial_allocation));
- back_index = 0;
- front_index = 1;
- }
- void
- HX_deque::grow()
- {
- UINT32 new_middle;
- new_middle = (UINT32) array->GetSize();
- array->SetSize(array->GetSize() * 2);
- if (back_index < front_index)
- {
- for (INT32 i = back_index; i >= 0; --i)
- {
- (*array)[HX_SAFEUINT(new_middle + i)] = (*array)[HX_SAFEUINT(i)];
- }
- back_index += new_middle;
- }
- }
- u_long32
- HX_deque::translate_index(u_long32 index)
- {
- if (index >= size())
- {
- HX_ASSERT(0);
- return 0;
- }
- if (front_index + index > (u_long32) array->GetSize() - 1)
- {
- return front_index + index - array->GetSize();
- }
- return front_index + index;
- }
- void*&
- HX_deque::operator[](u_long32 index)
- {
- if (index >= size())
- {
- HX_ASSERT(0);
- index = 0;
- }
- return (*array)[HX_SAFEUINT(translate_index(index))];
- }
- void*&
- HX_deque::front()
- {
- if (empty())
- {
- HX_ASSERT(0);
- }
- return (*array)[HX_SAFEUINT(front_index)];
- }
- void*&
- HX_deque::back()
- {
- if (empty())
- {
- HX_ASSERT(0);
- }
- return (*array)[HX_SAFEUINT(back_index)];
- }
- void
- HX_deque::push_front(void* item)
- {
- if (num_items == (u_long32) array->GetSize())
- {
- grow();
- }
- if (front_index == 0)
- {
- front_index = array->GetSize() - 1;
- }
- else
- {
- --front_index;
- }
- (*array)[HX_SAFEUINT(front_index)] = item;
- ++num_items;
- }
- void
- HX_deque::push_back(void* item)
- {
- if (num_items == (u_long32) array->GetSize())
- {
- grow();
- }
- if (back_index == (u_long32) array->GetSize() - 1)
- {
- back_index = 0;
- }
- else
- {
- ++back_index;
- }
- (*array)[HX_SAFEUINT(back_index)] = item;
- ++num_items;
- }
- void*
- HX_deque::pop_front()
- {
- if (empty())
- {
- HX_ASSERT(0);
- return 0;
- }
- void* return_value;
-
- return_value = (*array)[HX_SAFEUINT(front_index)];
- if (front_index == (u_long32) array->GetSize() - 1)
- {
- front_index = 0;
- }
- else
- {
- ++front_index;
- }
- --num_items;
- return return_value;
- }
- void*
- HX_deque::pop_back()
- {
- if (empty())
- {
- HX_ASSERT(0);
- return 0;
- }
- void* return_value;
- return_value = (*array)[HX_SAFEUINT(back_index)];
- if (back_index == 0)
- {
- back_index = array->GetSize() - 1;
- }
- else
- {
- --back_index;
- }
- --num_items;
- return return_value;
- }