зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.9 KiB
C
115 строки
3.9 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2002 Jason Evans <jasone@canonware.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer
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* unmodified other than the allowable addition of one or more
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* copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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/*
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* List definitions.
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*/
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#define ql_head(a_type) \
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struct { \
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a_type *qlh_first; \
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}
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#define ql_head_initializer(a_head) {NULL}
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#define ql_elm(a_type) qr(a_type)
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/* List functions. */
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#define ql_new(a_head) do { \
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(a_head)->qlh_first = NULL; \
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} while (0)
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#define ql_elm_new(a_elm, a_field) qr_new((a_elm), a_field)
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#define ql_first(a_head) ((a_head)->qlh_first)
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#define ql_last(a_head, a_field) \
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((ql_first(a_head) != NULL) \
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? qr_prev(ql_first(a_head), a_field) : NULL)
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#define ql_next(a_head, a_elm, a_field) \
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((ql_last(a_head, a_field) != (a_elm)) \
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? qr_next((a_elm), a_field) : NULL)
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#define ql_prev(a_head, a_elm, a_field) \
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((ql_first(a_head) != (a_elm)) ? qr_prev((a_elm), a_field) \
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: NULL)
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#define ql_before_insert(a_head, a_qlelm, a_elm, a_field) do { \
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qr_before_insert((a_qlelm), (a_elm), a_field); \
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if (ql_first(a_head) == (a_qlelm)) { \
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ql_first(a_head) = (a_elm); \
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} \
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} while (0)
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#define ql_after_insert(a_qlelm, a_elm, a_field) \
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qr_after_insert((a_qlelm), (a_elm), a_field)
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#define ql_head_insert(a_head, a_elm, a_field) do { \
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if (ql_first(a_head) != NULL) { \
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qr_before_insert(ql_first(a_head), (a_elm), a_field); \
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} \
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ql_first(a_head) = (a_elm); \
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} while (0)
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#define ql_tail_insert(a_head, a_elm, a_field) do { \
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if (ql_first(a_head) != NULL) { \
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qr_before_insert(ql_first(a_head), (a_elm), a_field); \
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} \
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ql_first(a_head) = qr_next((a_elm), a_field); \
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} while (0)
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#define ql_remove(a_head, a_elm, a_field) do { \
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if (ql_first(a_head) == (a_elm)) { \
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ql_first(a_head) = qr_next(ql_first(a_head), a_field); \
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} \
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if (ql_first(a_head) != (a_elm)) { \
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qr_remove((a_elm), a_field); \
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} else { \
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ql_first(a_head) = NULL; \
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} \
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} while (0)
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#define ql_head_remove(a_head, a_type, a_field) do { \
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a_type *t = ql_first(a_head); \
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ql_remove((a_head), t, a_field); \
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} while (0)
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#define ql_tail_remove(a_head, a_type, a_field) do { \
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a_type *t = ql_last(a_head, a_field); \
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ql_remove((a_head), t, a_field); \
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} while (0)
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#define ql_foreach(a_var, a_head, a_field) \
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qr_foreach((a_var), ql_first(a_head), a_field)
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#define ql_reverse_foreach(a_var, a_head, a_field) \
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qr_reverse_foreach((a_var), ql_first(a_head), a_field)
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