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| /******************************************************** Copyright (C), 2016-2017, FileName: list Author: woniu201 Email: wangpengfei.201@163.com Created: 2018/01/28 Description:单向有头链表使用 ********************************************************/ #include <stdio.h> #include "list_head.h" /************************************ @ Brief: 创建链表头 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ list* list_create() { list* pNode = (list *)malloc(sizeof(list)); memset(pNode, 0, sizeof(list)); if (pNode == NULL) { return MALLOC_FAIL; } pNode->pNext = NULL; return pNode; } /************************************ @ Brief: 按位置插入节点 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ int list_insert_at(list* pHead, int i, datatype* pData) { int j = 0; if (pHead == NULL) { return NOHEADNODE; } list* pNode = pHead; if (i<0) { return INDEXFAIL; } while (j< i && pNode !=NULL) { pNode = pNode->pNext; j++; } if (pNode == NULL) { return INDEXFAIL; } else { list* newNode = (list*)malloc(sizeof(list)); if (newNode ==NULL) { return MALLOC_FAIL; } memset(newNode, 0, sizeof(list)); newNode->data = *pData; pNode->pNext = newNode; } return SUCC; } /************************************ @ Brief: 按顺序插入节点 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ int list_order_insert(list* pHead, datatype* pData) { if (pHead == NULL) { return NOHEADNODE; } list* pNewNode = (list*)malloc(sizeof(list)); if (pNewNode == NULL) { return MALLOC_FAIL; } memset(pNewNode, 0, sizeof(list)); pNewNode->data = *pData; list* pNode = pHead; if (pNode->pNext == NULL) { pNode->pNext = pNewNode; return SUCC; } while (pNode->pNext != NULL && pNode->pNext->data < *pData) { pNode = pNode->pNext; } if (pNode->pNext) { pNewNode->pNext = pNode->pNext; pNode->pNext = pNewNode; } else { pNode->pNext = pNewNode; } return SUCC; } /************************************ @ Brief: 按位置删除节点 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ int list_delete_at(list* pHead, int index) { int j = 0; if (pHead == NULL) { return NOHEADNODE; } if (index < 0) { return INDEXFAIL; } list* pCur = pHead; list* pNode = pHead; while (pCur->pNext) { pNode = pCur; pCur = pCur->pNext; if (index == j) { break; } j++; } if (j< index) { printf("不存在该节点\n"); return INDEXFAIL; } else { if (pCur->pNext == NULL) { pNode->pNext = NULL; } else { pNode->pNext = pCur->pNext; } free(pCur); pCur = NULL; } return SUCC; } /************************************ @ Brief: 按值删除节点 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ int list_delete(list* pHead, datatype* pData) { if (pHead == NULL) { return NOHEADNODE; } list* pCur = pHead; list* pNode = pHead; int bFind = 0; while (pCur->pNext) { pNode = pCur; pCur = pCur->pNext; if (pCur->data == *pData) { bFind = 1; break; } } if (!bFind) { printf("不存在该节点\n"); return INDEXFAIL; } else { if (pCur->pNext == NULL) { pNode->pNext = NULL; } else { pNode->pNext = pCur->pNext; } free(pCur); pCur = NULL; } return SUCC; } /************************************ @ Brief: 判断链表是否为空 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ int list_isempty(list* pHead) { if (pHead->pNext == NULL) { return LIST_EMPTY; } else { return LIST_NOEMPTY; } } /************************************ @ Brief: 遍历打印链表 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ void list_display(list* pHead) { if (list_isempty(pHead) == LIST_EMPTY) { printf("链表为空\n"); return FAIL; } list* pNode = pHead->pNext; while (pNode) { printf("%d\n", pNode->data); pNode = pNode->pNext; } } /************************************ @ Brief: 释放链表内存 @ Author: woniu201 @ Created: 2018/01/28 @ Return: ************************************/ void list_destory(list* pHead) { list* pCur = pHead; list* pNext = pHead->pNext; while (pNext) { pNext = pNext->pNext; free(pCur); pCur = NULL; pCur = pNext; } }
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