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

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