1 /****************************************************************************** 2 * 3 * Copyright (C) 2002 Jason Evans <jasone (at) canonware.com>. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice(s), this list of conditions and the following disclaimer 11 * unmodified other than the allowable addition of one or more 12 * copyright notices. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice(s), this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 25 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 27 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 28 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 ******************************************************************************/ 31 32 /* 33 * List definitions. 34 */ 35 #define ql_head(a_type) \ 36 struct { \ 37 a_type *qlh_first; \ 38 } 39 40 #define ql_head_initializer(a_head) {NULL} 41 42 #define ql_elm(a_type) qr(a_type) 43 44 /* List functions. */ 45 #define ql_new(a_head) do { \ 46 (a_head)->qlh_first = NULL; \ 47 } while (0) 48 49 #define ql_elm_new(a_elm, a_field) qr_new((a_elm), a_field) 50 51 #define ql_first(a_head) ((a_head)->qlh_first) 52 53 #define ql_last(a_head, a_field) \ 54 ((ql_first(a_head) != NULL) \ 55 ? qr_prev(ql_first(a_head), a_field) : NULL) 56 57 #define ql_next(a_head, a_elm, a_field) \ 58 ((ql_last(a_head, a_field) != (a_elm)) \ 59 ? qr_next((a_elm), a_field) : NULL) 60 61 #define ql_prev(a_head, a_elm, a_field) \ 62 ((ql_first(a_head) != (a_elm)) ? qr_prev((a_elm), a_field) \ 63 : NULL) 64 65 #define ql_before_insert(a_head, a_qlelm, a_elm, a_field) do { \ 66 qr_before_insert((a_qlelm), (a_elm), a_field); \ 67 if (ql_first(a_head) == (a_qlelm)) { \ 68 ql_first(a_head) = (a_elm); \ 69 } \ 70 } while (0) 71 72 #define ql_after_insert(a_qlelm, a_elm, a_field) \ 73 qr_after_insert((a_qlelm), (a_elm), a_field) 74 75 #define ql_head_insert(a_head, a_elm, a_field) do { \ 76 if (ql_first(a_head) != NULL) { \ 77 qr_before_insert(ql_first(a_head), (a_elm), a_field); \ 78 } \ 79 ql_first(a_head) = (a_elm); \ 80 } while (0) 81 82 #define ql_tail_insert(a_head, a_elm, a_field) do { \ 83 if (ql_first(a_head) != NULL) { \ 84 qr_before_insert(ql_first(a_head), (a_elm), a_field); \ 85 } \ 86 ql_first(a_head) = qr_next((a_elm), a_field); \ 87 } while (0) 88 89 #define ql_remove(a_head, a_elm, a_field) do { \ 90 if (ql_first(a_head) == (a_elm)) { \ 91 ql_first(a_head) = qr_next(ql_first(a_head), a_field); \ 92 } \ 93 if (ql_first(a_head) != (a_elm)) { \ 94 qr_remove((a_elm), a_field); \ 95 } else { \ 96 ql_first(a_head) = NULL; \ 97 } \ 98 } while (0) 99 100 #define ql_head_remove(a_head, a_type, a_field) do { \ 101 a_type *t = ql_first(a_head); \ 102 ql_remove((a_head), t, a_field); \ 103 } while (0) 104 105 #define ql_tail_remove(a_head, a_type, a_field) do { \ 106 a_type *t = ql_last(a_head, a_field); \ 107 ql_remove((a_head), t, a_field); \ 108 } while (0) 109 110 #define ql_foreach(a_var, a_head, a_field) \ 111 qr_foreach((a_var), ql_first(a_head), a_field) 112 113 #define ql_reverse_foreach(a_var, a_head, a_field) \ 114 qr_reverse_foreach((a_var), ql_first(a_head), a_field) 115 116
