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Annotation of sbbs/include/mozilla/js/jsclist.h, revision 1.1

1.1     ! root        1: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
        !             2: /* ***** BEGIN LICENSE BLOCK *****
        !             3:  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
        !             4:  *
        !             5:  * The contents of this file are subject to the Mozilla Public License Version
        !             6:  * 1.1 (the "License"); you may not use this file except in compliance with
        !             7:  * the License. You may obtain a copy of the License at
        !             8:  * http://www.mozilla.org/MPL/
        !             9:  *
        !            10:  * Software distributed under the License is distributed on an "AS IS" basis,
        !            11:  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
        !            12:  * for the specific language governing rights and limitations under the
        !            13:  * License.
        !            14:  *
        !            15:  * The Original Code is Mozilla Communicator client code, released
        !            16:  * March 31, 1998.
        !            17:  *
        !            18:  * The Initial Developer of the Original Code is
        !            19:  * Netscape Communications Corporation.
        !            20:  * Portions created by the Initial Developer are Copyright (C) 1998
        !            21:  * the Initial Developer. All Rights Reserved.
        !            22:  *
        !            23:  * Contributor(s):
        !            24:  *
        !            25:  * Alternatively, the contents of this file may be used under the terms of
        !            26:  * either of the GNU General Public License Version 2 or later (the "GPL"),
        !            27:  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
        !            28:  * in which case the provisions of the GPL or the LGPL are applicable instead
        !            29:  * of those above. If you wish to allow use of your version of this file only
        !            30:  * under the terms of either the GPL or the LGPL, and not to allow others to
        !            31:  * use your version of this file under the terms of the MPL, indicate your
        !            32:  * decision by deleting the provisions above and replace them with the notice
        !            33:  * and other provisions required by the GPL or the LGPL. If you do not delete
        !            34:  * the provisions above, a recipient may use your version of this file under
        !            35:  * the terms of any one of the MPL, the GPL or the LGPL.
        !            36:  *
        !            37:  * ***** END LICENSE BLOCK ***** */
        !            38: 
        !            39: #ifndef jsclist_h___
        !            40: #define jsclist_h___
        !            41: 
        !            42: #include "jstypes.h"
        !            43: 
        !            44: /*
        !            45: ** Circular linked list
        !            46: */
        !            47: typedef struct JSCListStr {
        !            48:     struct JSCListStr *next;
        !            49:     struct JSCListStr *prev;
        !            50: } JSCList;
        !            51: 
        !            52: /*
        !            53: ** Insert element "_e" into the list, before "_l".
        !            54: */
        !            55: #define JS_INSERT_BEFORE(_e,_l)     \
        !            56:     JS_BEGIN_MACRO      \
        !            57:    (_e)->next = (_l);   \
        !            58:    (_e)->prev = (_l)->prev; \
        !            59:    (_l)->prev->next = (_e); \
        !            60:    (_l)->prev = (_e);   \
        !            61:     JS_END_MACRO
        !            62: 
        !            63: /*
        !            64: ** Insert element "_e" into the list, after "_l".
        !            65: */
        !            66: #define JS_INSERT_AFTER(_e,_l)  \
        !            67:     JS_BEGIN_MACRO      \
        !            68:    (_e)->next = (_l)->next; \
        !            69:    (_e)->prev = (_l);   \
        !            70:    (_l)->next->prev = (_e); \
        !            71:    (_l)->next = (_e);   \
        !            72:     JS_END_MACRO
        !            73: 
        !            74: /*
        !            75: ** Return the element following element "_e"
        !            76: */
        !            77: #define JS_NEXT_LINK(_e)    \
        !            78:        ((_e)->next)
        !            79: /*
        !            80: ** Return the element preceding element "_e"
        !            81: */
        !            82: #define JS_PREV_LINK(_e)    \
        !            83:        ((_e)->prev)
        !            84: 
        !            85: /*
        !            86: ** Append an element "_e" to the end of the list "_l"
        !            87: */
        !            88: #define JS_APPEND_LINK(_e,_l) JS_INSERT_BEFORE(_e,_l)
        !            89: 
        !            90: /*
        !            91: ** Insert an element "_e" at the head of the list "_l"
        !            92: */
        !            93: #define JS_INSERT_LINK(_e,_l) JS_INSERT_AFTER(_e,_l)
        !            94: 
        !            95: /* Return the head/tail of the list */
        !            96: #define JS_LIST_HEAD(_l) (_l)->next
        !            97: #define JS_LIST_TAIL(_l) (_l)->prev
        !            98: 
        !            99: /*
        !           100: ** Remove the element "_e" from it's circular list.
        !           101: */
        !           102: #define JS_REMOVE_LINK(_e)        \
        !           103:     JS_BEGIN_MACRO            \
        !           104:    (_e)->prev->next = (_e)->next; \
        !           105:    (_e)->next->prev = (_e)->prev; \
        !           106:     JS_END_MACRO
        !           107: 
        !           108: /*
        !           109: ** Remove the element "_e" from it's circular list. Also initializes the
        !           110: ** linkage.
        !           111: */
        !           112: #define JS_REMOVE_AND_INIT_LINK(_e)    \
        !           113:     JS_BEGIN_MACRO            \
        !           114:    (_e)->prev->next = (_e)->next; \
        !           115:    (_e)->next->prev = (_e)->prev; \
        !           116:    (_e)->next = (_e);         \
        !           117:    (_e)->prev = (_e);         \
        !           118:     JS_END_MACRO
        !           119: 
        !           120: /*
        !           121: ** Return non-zero if the given circular list "_l" is empty, zero if the
        !           122: ** circular list is not empty
        !           123: */
        !           124: #define JS_CLIST_IS_EMPTY(_l) \
        !           125:     ((_l)->next == (_l))
        !           126: 
        !           127: /*
        !           128: ** Initialize a circular list
        !           129: */
        !           130: #define JS_INIT_CLIST(_l)  \
        !           131:     JS_BEGIN_MACRO    \
        !           132:    (_l)->next = (_l); \
        !           133:    (_l)->prev = (_l); \
        !           134:     JS_END_MACRO
        !           135: 
        !           136: #define JS_INIT_STATIC_CLIST(_l) \
        !           137:     {(_l), (_l)}
        !           138: 
        !           139: #endif /* jsclist_h___ */

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