86 lines
1.3 KiB
C
86 lines
1.3 KiB
C
/*************************************************************************
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> File Name: list_queue.c
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> Author: jinshaohui
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> Mail: jinshaohui789@163.com
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> Time: 18-10-13
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> Desc:
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************************************************************************/
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#include<stdio.h>
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#include<stdlib.h>
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#include<string.h>
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#include"./list_queue.h"
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/*创建队列头*/
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list_queue *list_queue_create()
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{
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list_queue * queue = NULL;
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queue = (list_queue *)malloc(sizeof(list_queue));
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if(queue == NULL)
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{
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return NULL;
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}
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queue->num = 0;
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queue->head = NULL;
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queue->tail = NULL;
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return queue;
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}
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int list_queue_enqueue(list_queue *queue,void *data)
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{
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queue_node *ptmp = NULL;
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if(queue == NULL)
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{
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return -1;
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}
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ptmp = (queue_node *)malloc(sizeof(queue_node));
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if (ptmp == NULL)
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{
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return -1;
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}
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ptmp->data = data;
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ptmp->next = NULL;
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if (queue->head == NULL)
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{
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queue->head = ptmp;
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}
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else
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{
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queue->tail->next = ptmp;
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}
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queue->tail = ptmp;
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queue->num++;
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return 0;
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}
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/*出队*/
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int list_queue_dequeue(list_queue *queue,void **data)
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{
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queue_node * ptmp = NULL;
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if ((queue == NULL) || (data == NULL) || list_queue_is_empty(queue))
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{
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return -1;
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}
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*data = queue->head->data;
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ptmp = queue->head;
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queue->head = queue->head->next;
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queue->num--;
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if (queue->head == NULL)
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{
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queue->tail = NULL;
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}
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free(ptmp);
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return 0;
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}
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