双向循环链表

dllist.h

 1 #ifndef _DLLIST_H
 2 #define _DLLIST_H
 3 
 4 #ifdef __cplusplus
 5 extern "C" {
 6 #endif 
 7 
 8 struct DLLNode_T{
 9     void *pData;                 //数据域指针
10     struct DLLNode_T *pPrev;     //前驱指针
11     struct DLLNode_T *pNext;     //后驱指针
12 };
13 
14 #define DLLNODE struct DLLNode_T
15 typedef DLLNODE *pNode;
16 #define DLLNODE_SIZE sizeof(struct DLLNode_T)
17 
18 
19 pNode DLLNODE_Init(void *pData);
20 
21 void DLLNODE_InsertToTail(pNode head, void *pData);
22 
23 int DLLNODE_GetCount(pNode head);
24 
25 pNode DLLNODE_Search(pNode head, char *acCmp, int (*fCmp)(void *pData, char *acCmp));
26 
27 int DLLNODE_GetIndex(pNode head, pNode pOperate);
28 
29 void DLLNODE_Print(pNode head, void (*fPrint)(void *pData));
30 
31 void DLLNODE_FreeFromHead(pNode head);
32 
33 void DLLNODE_TDelete(pNode pTDel);
34 
35 bool DLLNODE_FDelete(pNode pFDel, void (*fDel)(void *pData));
36 
37 #ifdef __cplusplus
38 }
39 #endif
40 
41 #endif

dllist.cpp

  1 #include <stdio.h>
  2 #include <stdlib.h>
  3 #include <string.h>
  4 #include "./dllist.h"
  5 
  6 pNode DLLNODE_Init(void *pData)
  7 {
  8     pNode DDLNode=NULL;
  9 
 10     DDLNode=(pNode)malloc(DLLNODE_SIZE);
 11     if(DDLNode==NULL)
 12     {
 13         printf("Error!");
 14     }
 15     else
 16     {
 17         DDLNode->pData=pData;
 18         // 初始化结点的前驱结点与后驱结点就是自身
 19         DDLNode->pPrev=DDLNode->pNext=DDLNode; 
 20     }
 21     
 22     return DDLNode;
 23 }
 24 
 25 
 26 void DLLNODE_InsertToTail(pNode head, void *pData)
 27 {
 28     pNode pNew=NULL;
 29 
 30     pNew=DLLNODE_Init(pData);
 31 
 32     pNew->pNext=head;
 33     head->pPrev->pNext=pNew;
 34     pNew->pPrev=head->pPrev;
 35     head->pPrev=pNew;
 36 }
 37 
 38 int DLLNODE_GetCount(pNode head)
 39 {
 40     pNode pTmp=NULL;
 41     int count=0;
 42 
 43     for(pTmp=head->pNext; pTmp!=head; pTmp=pTmp->pNext)
 44     {
 45         count++;
 46     }
 47 
 48     return count;
 49 }
 50 
 51 pNode DLLNODE_Search(pNode head, char *acCmp, int (*fCmp)(void *pData, char *acCmp))
 52 {
 53     pNode pTmp=NULL;
 54 
 55     for(pTmp=head->pNext; pTmp!=head; pTmp=pTmp->pNext)
 56     {
 57         if(fCmp(pTmp->pData, acCmp))
 58         {
 59             return pTmp;
 60         }
 61     }
 62     
 63     return NULL;
 64 }
 65 
 66 int DLLNODE_GetIndex(pNode head, pNode pOperate)
 67 {
 68     pNode pTmp=NULL;
 69     int iIndex=0;
 70     
 71     for(pTmp=head->pNext; pTmp!=head; pTmp=pTmp->pNext)
 72     {
 73         iIndex++;
 74         if(pTmp==pOperate)
 75         {
 76             break;
 77         }
 78     }
 79 
 80     return iIndex;
 81 }
 82 
 83 void DLLNODE_Print(pNode head, void (*fPrint)(void *pData))
 84 {
 85     pNode pTmp=NULL;
 86     int count=0;
 87     int iOption=0;
 88 
 89     if(head->pNext==head)
 90     {
 91         printf("---链表无数据---
");
 92     }
 93     else
 94     {
 95         for(pTmp=head->pNext; pTmp!=head; pTmp=pTmp->pNext)
 96         {
 97             fPrint(pTmp->pData);
 98         }
 99     }    
100 }
101 
102 void DLLNODE_FreeFromHead(pNode head)
103 {
104     pNode pTmp=NULL;
105 
106     for(pTmp=head->pNext; pTmp!=head; pTmp=head->pNext)
107     {
108         pTmp->pNext->pPrev=head;
109         head->pNext=pTmp->pNext;
110         free(pTmp->pData);
111         free(pTmp);
112     }
113     free(head);
114 }
115 
116 void DLLNODE_TDelete(pNode pTDel)
117 {
118     pTDel->pPrev->pNext=pTDel->pNext;
119     pTDel->pNext->pPrev=pTDel->pPrev;
120 
121     free(pTDel->pData);
122     free(pTDel);
123 }
124 
125 bool DLLNODE_FDelete(pNode pFDel, void (*fDel)(void *pData))
126 {
127     if(pFDel==NULL)
128     {
129         return false;
130     }
131     else
132     {
133         fDel(pFDel->pData);
134         return true;
135     }
136 }

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原文地址：https://www.cnblogs.com/paullam/p/3732683.html