|
37 | 37 | * Function Definitions
|
38 | 38 | */
|
39 | 39 |
|
40 |
| -UtListHead_t *UtList_Create(void) |
| 40 | +UtListHead_t *UtList_Create(uint32 NumTags) |
41 | 41 | {
|
42 |
| - UtListHead_t *NewList; |
| 42 | + struct ListAllocator |
| 43 | + { |
| 44 | + UtListHead_t Head; |
| 45 | + UtListNode_t Tags[]; |
| 46 | + }; |
| 47 | + struct ListAllocator *NewList; |
| 48 | + UtListNode_t *TagHead; |
| 49 | + size_t ActualSize; |
| 50 | + uint32 i; |
| 51 | + |
| 52 | + ActualSize = sizeof(struct ListAllocator) + (sizeof(UtListNode_t) * NumTags); |
| 53 | + NewList = (struct ListAllocator *)malloc(ActualSize); |
| 54 | + |
| 55 | + memset(NewList, 0, ActualSize); |
| 56 | + |
| 57 | + NewList->Head.Tags = NewList->Tags; |
| 58 | + NewList->Head.NumberOfTags = NumTags; |
| 59 | + |
| 60 | + for (i=0; i < NumTags; ++i) |
| 61 | + { |
| 62 | + TagHead = &NewList->Head.Tags[i]; |
| 63 | + TagHead->Tag = i; |
| 64 | + TagHead->Next = TagHead; |
| 65 | + TagHead->Prev = TagHead; |
| 66 | + } |
43 | 67 |
|
44 |
| - NewList = malloc(sizeof(UtListHead_t)); |
45 |
| - NewList->First = NULL; |
46 |
| - NewList->Last = NULL; |
47 |
| - NewList->NumberOfEntries = 0; |
48 |
| - return (NewList); |
| 68 | + return (&NewList->Head); |
49 | 69 | }
|
50 | 70 |
|
51 | 71 | void UtList_Destroy(UtListHead_t *ListHead)
|
52 | 72 | {
|
53 |
| - UtList_Reset(ListHead); |
| 73 | + uint32 i; |
| 74 | + |
| 75 | + for (i=0; i < ListHead->NumberOfTags; ++i) |
| 76 | + { |
| 77 | + UtList_Reset(&ListHead->Tags[i]); |
| 78 | + } |
54 | 79 | free(ListHead);
|
55 | 80 | }
|
56 | 81 |
|
57 |
| -void UtList_Reset(UtListHead_t *ListHead) |
| 82 | +void UtList_Reset(UtListNode_t *TagHead) |
58 | 83 | {
|
59 |
| - while (!UtList_IsEmpty(ListHead)) { |
60 |
| - UtList_DeleteFirst(ListHead); |
| 84 | + while (!UtList_IsEmpty(TagHead)) |
| 85 | + { |
| 86 | + UtList_DeleteNode(TagHead->Next); |
61 | 87 | }
|
62 | 88 | }
|
63 | 89 |
|
64 |
| -void UtList_Add(UtListHead_t *ListHead, void *Data, uint32 DataSize, uint32 Tag) |
| 90 | +void UtList_Merge(UtListNode_t *TagHead1, UtListNode_t *TagHead2) |
65 | 91 | {
|
66 |
| - UtListNode_t *NewNode = NULL; |
67 |
| - |
68 |
| - NewNode = malloc(sizeof(UtListNode_t)); |
69 |
| - if (ListHead->NumberOfEntries == 0) { |
70 |
| - |
71 |
| - ListHead->First = NewNode; |
72 |
| - ListHead->Last = NewNode; |
73 |
| - ListHead->NumberOfEntries++; |
| 92 | + UtListNode_t *Tail1 = TagHead1->Prev; |
| 93 | + UtListNode_t *Tail2 = TagHead2->Prev; |
74 | 94 |
|
75 |
| - NewNode->Next = NULL; |
76 |
| - NewNode->Prev = NULL; |
77 |
| - NewNode->Tag = Tag; |
78 |
| - NewNode->DataSize = DataSize; |
79 |
| - NewNode->Data = malloc(DataSize); |
80 |
| - memcpy(NewNode->Data, Data, DataSize); |
81 |
| - } |
82 |
| - else { |
| 95 | + Tail1->Next = TagHead2; |
| 96 | + Tail2->Next = TagHead1; |
| 97 | + TagHead1->Prev = Tail2; |
| 98 | + TagHead2->Prev = Tail1; |
| 99 | +} |
83 | 100 |
|
84 |
| - NewNode->Next = NULL; |
85 |
| - NewNode->Prev = ListHead->Last; |
86 |
| - NewNode->Tag = Tag; |
87 |
| - NewNode->DataSize = DataSize; |
88 |
| - NewNode->Data = malloc(DataSize); |
89 |
| - memcpy(NewNode->Data, Data, DataSize); |
| 101 | +void UtList_Insert_After(UtListNode_t *ExistingNode, UtListNode_t *NewNode) |
| 102 | +{ |
| 103 | + NewNode->Next = ExistingNode->Next; |
| 104 | + NewNode->Prev = ExistingNode; |
| 105 | + NewNode->Prev->Next = NewNode; |
| 106 | + NewNode->Next->Prev = NewNode; |
| 107 | +} |
90 | 108 |
|
91 |
| - ListHead->Last->Next = NewNode; |
92 |
| - ListHead->Last = NewNode; |
93 |
| - ListHead->NumberOfEntries++; |
94 |
| - } |
| 109 | +void UtList_Insert_Before(UtListNode_t *ExistingNode, UtListNode_t *NewNode) |
| 110 | +{ |
| 111 | + NewNode->Next = ExistingNode; |
| 112 | + NewNode->Prev = ExistingNode->Prev; |
| 113 | + NewNode->Prev->Next = NewNode; |
| 114 | + NewNode->Next->Prev = NewNode; |
95 | 115 | }
|
96 | 116 |
|
97 |
| -void UtList_DeleteFirst(UtListHead_t *ListHead) |
| 117 | +void UtList_Extract(UtListNode_t *ExistingNode) |
98 | 118 | {
|
99 |
| - UtList_DeleteNode(ListHead, ListHead->First); |
| 119 | + ExistingNode->Next->Prev = ExistingNode->Prev; |
| 120 | + ExistingNode->Prev->Next = ExistingNode->Next; |
| 121 | + ExistingNode->Next = ExistingNode; |
| 122 | + ExistingNode->Prev = ExistingNode; |
100 | 123 | }
|
101 | 124 |
|
102 |
| -void UtList_DeleteLast(UtListHead_t *ListHead) |
| 125 | +UtListNode_t *UtList_NewNode(void *Data, uint32 DataSize) |
103 | 126 | {
|
104 |
| - UtList_DeleteNode(ListHead, ListHead->Last); |
| 127 | + union NodeAllocator |
| 128 | + { |
| 129 | + UtListNode_t Node; |
| 130 | + double AlignDbl; |
| 131 | + void* AlignPtr; |
| 132 | + long AlignLong; |
| 133 | + } *AllocNode; |
| 134 | + |
| 135 | + AllocNode = malloc(sizeof(union NodeAllocator) + DataSize); |
| 136 | + memset(AllocNode, 0, sizeof(union NodeAllocator)); |
| 137 | + AllocNode->Node.Data = &AllocNode[1]; |
| 138 | + AllocNode->Node.DataSize = DataSize; |
| 139 | + memcpy(AllocNode->Node.Data, Data, DataSize); |
| 140 | + |
| 141 | + AllocNode->Node.Next = &AllocNode->Node; |
| 142 | + AllocNode->Node.Prev = &AllocNode->Node; |
| 143 | + |
| 144 | + return &AllocNode->Node; |
105 | 145 | }
|
106 | 146 |
|
107 |
| -void UtList_DeleteNode(UtListHead_t *ListHead, UtListNode_t *DeleteNode) |
| 147 | + |
| 148 | +void UtList_Add(UtListHead_t *ListHead, void *Data, uint32 DataSize, uint32 Tag) |
108 | 149 | {
|
109 |
| - |
110 |
| - if (!UtList_IsEmpty(ListHead)) { |
111 |
| - |
112 |
| - if (ListHead->NumberOfEntries == 1) { |
113 |
| - ListHead->First = NULL; |
114 |
| - ListHead->Last = NULL; |
115 |
| - ListHead->NumberOfEntries = 0; |
116 |
| - } |
117 |
| - else if (DeleteNode == ListHead->First) { |
118 |
| - ListHead->First = DeleteNode->Next; |
119 |
| - ListHead->First->Prev = NULL; |
120 |
| - ListHead->NumberOfEntries--; |
121 |
| - } |
122 |
| - else if (DeleteNode == ListHead->Last) { |
123 |
| - ListHead->Last = DeleteNode->Prev; |
124 |
| - ListHead->Last->Next = NULL; |
125 |
| - ListHead->NumberOfEntries--; |
126 |
| - } |
127 |
| - else { |
128 |
| - DeleteNode->Prev->Next = DeleteNode->Next; |
129 |
| - DeleteNode->Next->Prev = DeleteNode->Prev; |
130 |
| - ListHead->NumberOfEntries--; |
131 |
| - } |
132 |
| - |
133 |
| - free(DeleteNode->Data); |
134 |
| - free(DeleteNode); |
| 150 | + UtListNode_t *TagHead; |
| 151 | + UtListNode_t *NewNode; |
| 152 | + |
| 153 | + TagHead = UtList_GetHead(ListHead, Tag); |
| 154 | + if (TagHead != NULL) |
| 155 | + { |
| 156 | + NewNode = UtList_NewNode(Data, DataSize); |
| 157 | + NewNode->Tag = Tag; |
| 158 | + UtList_Insert_Before(TagHead, NewNode); |
135 | 159 | }
|
136 | 160 | }
|
137 | 161 |
|
138 |
| -void UtList_RemoveFirst(UtListHead_t *ListHead, void *Data) |
| 162 | +void UtList_DeleteNode(UtListNode_t *DeleteNode) |
139 | 163 | {
|
140 |
| - UtList_RemoveNode(ListHead, Data, ListHead->First); |
| 164 | + UtList_Extract(DeleteNode); |
| 165 | + |
| 166 | + /* non-data/header nodes shouldn't be free()'ed */ |
| 167 | + if (DeleteNode->Data != NULL) |
| 168 | + { |
| 169 | + free(DeleteNode); |
| 170 | + } |
141 | 171 | }
|
142 | 172 |
|
143 |
| -void UtList_RemoveLast(UtListHead_t *ListHead, void *Data) |
| 173 | +bool UtList_IsEmpty(UtListNode_t *TagHead) |
144 | 174 | {
|
145 |
| - UtList_RemoveNode(ListHead, Data, ListHead->Last); |
| 175 | + return(TagHead->Next == TagHead); |
146 | 176 | }
|
147 | 177 |
|
148 |
| -void UtList_RemoveNode(UtListHead_t *ListHead, void *Data, UtListNode_t *CurrentNode) |
| 178 | +UtListNode_t *UtList_GetHead(UtListHead_t *ListHead, uint32 Tag) |
149 | 179 | {
|
150 |
| - if (!UtList_IsEmpty(ListHead)) { |
151 |
| - memcpy(Data, CurrentNode->Data, CurrentNode->DataSize); |
152 |
| - UtList_DeleteNode(ListHead, CurrentNode); |
| 180 | + if (Tag >= ListHead->NumberOfTags) |
| 181 | + { |
| 182 | + return NULL; |
153 | 183 | }
|
| 184 | + return &ListHead->Tags[Tag]; |
154 | 185 | }
|
155 | 186 |
|
156 |
| -UtListNode_t *UtList_First(UtListHead_t *ListHead) |
| 187 | +UtListNode_t *UtList_GetNext(UtListNode_t *ListNode) |
157 | 188 | {
|
158 |
| - return(ListHead->First); |
| 189 | + return ListNode->Next; |
159 | 190 | }
|
160 | 191 |
|
161 |
| -UtListNode_t *UtList_Last(UtListHead_t *ListHead) |
| 192 | +void *UtList_GetObject(UtListNode_t *ListNode) |
162 | 193 | {
|
163 |
| - return(ListHead->Last); |
| 194 | + return ListNode->Data; |
164 | 195 | }
|
165 | 196 |
|
166 |
| -bool UtList_IsEmpty(UtListHead_t *ListHead) |
| 197 | +bool UtList_IsEnd(UtListNode_t *TagHead, UtListNode_t *ListNode) |
167 | 198 | {
|
168 |
| - return(ListHead->NumberOfEntries == 0); |
| 199 | + return(TagHead == ListNode); |
169 | 200 | }
|
170 | 201 |
|
171 |
| -uint32 UtList_Depth(UtListHead_t *ListHead) |
172 |
| -{ |
173 |
| - return(ListHead->NumberOfEntries); |
174 |
| -} |
|
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