The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /*-------------------------------------------------------------------*/ |
| 2 | /* List Functionality */ |
| 3 | /*-------------------------------------------------------------------*/ |
| 4 | /* #define SH_LIST_DEBUG */ |
| 5 | /*-------------------------------------------------------------------*/ |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | #include "shlist.h" |
| 9 | /*-------------------------------------------------------------------*/ |
| 10 | void shListInitList( SHLIST *listPtr ) |
| 11 | { |
| 12 | listPtr->data = (void *)0L; |
| 13 | listPtr->next = listPtr; |
| 14 | listPtr->prev = listPtr; |
| 15 | } |
| 16 | |
| 17 | SHLIST *shListFindItem( SHLIST *head, void *val, shListEqual func ) |
| 18 | { |
| 19 | SHLIST *item; |
| 20 | |
| 21 | for(item=head->next;( item != head );item=item->next) |
| 22 | if( func ) { |
| 23 | if( func( val, item->data ) ) { |
| 24 | return( item ); |
| 25 | } |
| 26 | } |
| 27 | else { |
| 28 | if( item->data == val ) { |
| 29 | return( item ); |
| 30 | } |
| 31 | } |
| 32 | return( NULL ); |
| 33 | } |
| 34 | |
| 35 | SHLIST *shListGetLastItem( SHLIST *head ) |
| 36 | { |
| 37 | if( head->prev != head ) |
| 38 | return( head->prev ); |
| 39 | return( NULL ); |
| 40 | } |
| 41 | |
| 42 | SHLIST *shListGetFirstItem( SHLIST *head ) |
| 43 | { |
| 44 | if( head->next != head ) |
| 45 | return( head->next ); |
| 46 | return( NULL ); |
| 47 | } |
| 48 | |
| 49 | SHLIST *shListGetNItem( SHLIST *head, unsigned long num ) |
| 50 | { |
| 51 | SHLIST *item; |
| 52 | unsigned long i; |
| 53 | |
| 54 | for(i=0,item=head->next;( (i < num) && (item != head) );i++,item=item->next); |
| 55 | if( item != head ) |
| 56 | return( item ); |
| 57 | return( NULL ); |
| 58 | } |
| 59 | |
| 60 | SHLIST *shListGetNextItem( SHLIST *head, SHLIST *item ) |
| 61 | { |
| 62 | if( item == NULL ) |
| 63 | return( NULL ); |
| 64 | if( item->next != head ) |
| 65 | return( item->next ); |
| 66 | return( NULL ); |
| 67 | } |
| 68 | |
| 69 | SHLIST *shListGetPrevItem( SHLIST *head, SHLIST *item ) |
| 70 | { |
| 71 | if( item == NULL ) |
| 72 | return( NULL ); |
| 73 | if( item->prev != head ) |
| 74 | return( item->prev ); |
| 75 | return( NULL ); |
| 76 | } |
| 77 | |
| 78 | void shListDelItem( SHLIST *head, SHLIST *item, shListFree func ) |
| 79 | { |
| 80 | if( item == NULL ) |
| 81 | return; |
| 82 | #ifdef SH_LIST_DEBUG |
| 83 | fprintf(stderr, "Del %lx\n", (unsigned long)(item->data)); |
| 84 | #endif |
| 85 | (item->prev)->next = item->next; |
| 86 | (item->next)->prev = item->prev; |
| 87 | if( func && item->data ) { |
| 88 | func( (void *)(item->data) ); |
| 89 | } |
| 90 | free( item ); |
| 91 | head->data = (void *)((unsigned long)(head->data) - 1); |
| 92 | } |
| 93 | |
| 94 | void shListInsFirstItem( SHLIST *head, void *val ) |
| 95 | { /* Insert to the beginning of the list */ |
| 96 | SHLIST *item; |
| 97 | |
| 98 | item = (SHLIST *)malloc( sizeof(SHLIST) ); |
| 99 | if( item == NULL ) |
| 100 | return; |
| 101 | item->data = val; |
| 102 | item->next = head->next; |
| 103 | item->prev = head; |
| 104 | (head->next)->prev = item; |
| 105 | head->next = item; |
| 106 | #ifdef SH_LIST_DEBUG |
| 107 | fprintf(stderr, "Ins First %lx\n", (unsigned long)(item->data)); |
| 108 | #endif |
| 109 | head->data = (void *)((unsigned long)(head->data) + 1); |
| 110 | } |
| 111 | |
| 112 | void shListInsLastItem( SHLIST *head, void *val ) |
| 113 | { /* Insert to the end of the list */ |
| 114 | SHLIST *item; |
| 115 | |
| 116 | item = (SHLIST *)malloc( sizeof(SHLIST) ); |
| 117 | if( item == NULL ) |
| 118 | return; |
| 119 | item->data = val; |
| 120 | item->next = head; |
| 121 | item->prev = head->prev; |
| 122 | (head->prev)->next = item; |
| 123 | head->prev = item; |
| 124 | #ifdef SH_LIST_DEBUG |
| 125 | fprintf(stderr, "Ins Last %lx\n", (unsigned long)(item->data)); |
| 126 | #endif |
| 127 | head->data = (void *)((unsigned long)(head->data) + 1); |
| 128 | } |
| 129 | |
| 130 | void shListInsBeforeItem( SHLIST *head, void *val, void *etal, |
| 131 | shListCmp func ) |
| 132 | { |
| 133 | SHLIST *item, *iptr; |
| 134 | |
| 135 | if( func == NULL ) |
| 136 | shListInsFirstItem( head, val ); |
| 137 | else { |
| 138 | item = (SHLIST *)malloc( sizeof(SHLIST) ); |
| 139 | if( item == NULL ) |
| 140 | return; |
| 141 | item->data = val; |
| 142 | for(iptr=head->next;( iptr != head );iptr=iptr->next) |
| 143 | if( func( val, iptr->data, etal ) ) |
| 144 | break; |
| 145 | item->next = iptr; |
| 146 | item->prev = iptr->prev; |
| 147 | (iptr->prev)->next = item; |
| 148 | iptr->prev = item; |
| 149 | #ifdef SH_LIST_DEBUG |
| 150 | fprintf(stderr, "Ins Before %lx\n", (unsigned long)(item->data)); |
| 151 | #endif |
| 152 | head->data = (void *)((unsigned long)(head->data) + 1); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | void shListDelAllItems( SHLIST *head, shListFree func ) |
| 157 | { |
| 158 | SHLIST *item; |
| 159 | |
| 160 | for(item=head->next;( item != head );) { |
| 161 | shListDelItem( head, item, func ); |
| 162 | item = head->next; |
| 163 | } |
| 164 | head->data = (void *)0L; |
| 165 | } |
| 166 | |
| 167 | void shListPrintAllItems( SHLIST *head, shListPrint func ) |
| 168 | { |
| 169 | #ifdef SH_LIST_DEBUG |
| 170 | SHLIST *item; |
| 171 | |
| 172 | for(item=head->next;( item != head );item=item->next) |
| 173 | if( func ) { |
| 174 | func(item->data); |
| 175 | } |
| 176 | else { |
| 177 | fprintf(stderr, "Item: %lx\n",(unsigned long)(item->data)); |
| 178 | } |
| 179 | #endif |
| 180 | } |
| 181 | |
| 182 | unsigned long shListGetCount( SHLIST *head ) |
| 183 | { |
| 184 | return( (unsigned long)(head->data) ); |
| 185 | } |