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demo

This commit is contained in:
cryindevil 2023-06-30 00:08:22 +08:00
parent 7754a149a9
commit 385a52ab24
6 changed files with 383 additions and 1 deletions
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4
APP_Framework/Applications/app_test/Kconfig
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@ -239,6 +239,10 @@ menu "test app"
menuconfig USER_TEST_TIMER
bool "Config test soft timer"
default n
menuconfig USER_TEST_HASH
bool "Config test hash"
default y
endif
endmenu

4
APP_Framework/Applications/app_test/Makefile
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@ -100,6 +100,10 @@ ifeq ($(CONFIG_ADD_XIZI_FETURES),y)
ifeq ($(CONFIG_USER_TEST_TIMER),y)
SRC_FILES += test_timer.c
endif
ifeq ($(CONFIG_USER_TEST_HASH),y)
SRC_FILES += test_hash/test_hash.c
endif
include $(KERNEL_ROOT)/compiler.mk
endif

156
APP_Framework/Applications/app_test/test_hash/README.md Normal file
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@ -0,0 +1,156 @@
# ##基于cortex-m3-emulator实现哈希表并测试验证##
## 1. 简介
实现哈希表，支持链地址法解决哈希冲突，并编写测试程序在shell终端打印结果
因为没有说明哈希的具体实现完成程度，以个人理解程度实现，以熟悉热身为目的
## 2. 数据结构设计说明
```C
#define TABLE_SIZE 10//哈希表的长度，使用宏定义，有需要可直接更改
typedef struct Node {
int key;
int value;
struct Node* next;
} Node;//一个结点的数据类型，包含key,value,和指向下一个结点的指针
typedef struct HashTable {
Node** table; // 存储链表头指针的数组
} HashTable;
```
## 3. 测试程序说明
包含两大部分函数
1，初始化链表使用的函数
```C
//创建一个结点，在添加键值对时使用
Node* createNode(int key, int value) {
Node* newNode = (Node*)malloc(sizeof(Node));
newNode->key = key;
newNode->value = value;
newNode->next = NULL;
return newNode;
}
//初始化哈希表
HashTable* createHashTable() {
HashTable* hashTable = (HashTable*)malloc(sizeof(HashTable));
hashTable->table = (Node**)calloc(TABLE_SIZE, sizeof(Node*));
return hashTable;
}
// 哈希函数，计算键的索引
int hashFunction(int key) {
return key % TABLE_SIZE;
}
```
2，对链表进行更改的函数，共五个操作即五个函数
```C
// 在哈希表中插入键值对
void insert(HashTable* hashTable, int key, int value) {
int index = hashFunction(key);
Node* newNode = createNode(key, value);
if (hashTable->table[index] == NULL) {
hashTable->table[index] = newNode;
} else {
Node* current = hashTable->table[index];
while (current->next != NULL) {
current = current->next;
}
current->next = newNode;
}
}
// 在哈希表中查找是否有该键，有则返回1，无则返回0
int find(HashTable* hashTable, int key) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key) {
return 1;
}
current = current->next;
}
return 0;
}
// 在哈希表中查找键对应的值，找到返回键对应的值，如果未找到返回-1
int get(HashTable* hashTable, int key) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key) {
return current->value;
}
current = current->next;
}
return -1;
}
//将某一键值对的值改变为新的值，修改成功返回1，如果未找到该键值对返回0
int change(HashTable* hashTable, int key , int oldValue , int newValue) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key && current->value == oldValue) {
current->value = newValue;
return 1;
}
current = current->next;
}
return 0;
}
//删除某一键值对，删除成功返回1，如果未找到该键值对返回0
int deleteNode(HashTable* hashTable, int key , int value ) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
Node* last = current;
if(current != NULL){
if (current->key == key && current->value == value){
hashTable->table[index] = current->next;
free(current);
return 1;
}
current = current->next;
}
while (current != NULL) {
if (current->key == key && current->value == value) {
last->next=current->next;
free(current);
return 1;
}
last = current;
current = current->next;
}
return 0;
}
```
### 测试思路：(测试代码即test_hash()函数中内容)
1，初始化了哈希表，随机选取了四个键值对进行插入
2，测试通过键寻找值，分成两种情况，找到和未找到
3，修改键值对的值，若找到键值对输出新的值，若找不到，显示未找到该键值对
4，删除特定键值对，同时证明对后续结点不产生影响
## 4. 运行结果（##需结合运行测试截图按步骤说明##）
![screenshot](screen.png)
1. 第一部分 插入了四个键值对
2. 第二部分 寻找key 13，在哈希表中，显示值为66；寻找key 24， 不在哈希表中，显示未找到
3. 第三部分 将键值对3，99修改成3，100，修改成功，显示新值为100；将键值对2，99修改成2，100，哈希表中不存在键值对2，99，失败.
4. 第四部分 删除键值对3，100，证明3，100消失，同时不影响后续结点。
5. 最后释放哈希表占用内存

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218
APP_Framework/Applications/app_test/test_hash/test_hash.c Normal file
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/*
* Copyright (c) 2020 AIIT XUOS Lab
* XiUOS is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* http://license.coscl.org.cn/MulanPSL2
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*/
/**
* @file: test_hash.c
* @brief: a application of hash function and hash test function
* @version: 1
* @author: 樱园精机
* @date: 2023/6/29
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <transform.h>
#ifdef ADD_XIZI_FETURES
#define TABLE_SIZE 10
// 定义哈希表中存储的元素结构
typedef struct Node {
int key;
int value;
struct Node* next;
} Node;
// 定义哈希表结构
typedef struct HashTable {
Node** table; // 存储链表头指针的数组
} HashTable;
// 创建新节点
Node* createNode(int key, int value) {
Node* newNode = (Node*)malloc(sizeof(Node));
newNode->key = key;
newNode->value = value;
newNode->next = NULL;
return newNode;
}
// 初始化哈希表
HashTable* createHashTable() {
HashTable* hashTable = (HashTable*)malloc(sizeof(HashTable));
hashTable->table = (Node**)calloc(TABLE_SIZE, sizeof(Node*));
return hashTable;
}
// 哈希函数，计算键的索引
int hashFunction(int key) {
return key % TABLE_SIZE;
}
// 在哈希表中插入键值对
void insert(HashTable* hashTable, int key, int value) {
int index = hashFunction(key);
Node* newNode = createNode(key, value);
if (hashTable->table[index] == NULL) {
hashTable->table[index] = newNode;
} else {
Node* current = hashTable->table[index];
while (current->next != NULL) {
current = current->next;
}
current->next = newNode;
}
}
// 在哈希表中查找键是否存在
int find(HashTable* hashTable, int key) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key) {
return 1;
}
current = current->next;
}
return 0; // 未找到对应的值
}
// 在哈希表中查找键对应的值
int get(HashTable* hashTable, int key) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key) {
return current->value;
}
current = current->next;
}
return -1; // 未找到对应的值
}
int change(HashTable* hashTable, int key , int oldValue , int newValue) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
while (current != NULL) {
if (current->key == key && current->value == oldValue) {
current->value = newValue;
return 1;
}
current = current->next;
}
return 0; // 未找到对应的键值对
}
int deleteNode(HashTable* hashTable, int key , int value ) {
int index = hashFunction(key);
Node* current = hashTable->table[index];
Node* last = current;
if(current != NULL){
if (current->key == key && current->value == value){
hashTable->table[index] = current->next;
free(current);
return 1;
}
current = current->next;
}
while (current != NULL) {
if (current->key == key && current->value == value) {
last->next=current->next;
free(current);
return 1;
}
last = current;
current = current->next;
}
return 0; // 未找到对应的键值对
}
void TestHash(void)
{
HashTable* hashTable = createHashTable();
printf("hashmap created\n");
// 在哈希表中插入键值对
insert(hashTable, 3, 99);
printf("key-value pairs 3,99 inserted\n");
insert(hashTable, 7, 88);
printf("key-value pairs 7,88 inserted\n");
insert(hashTable, 13, 66);
printf("key-value pairs 13,66 inserted\n");
insert(hashTable, 17, 55);
printf("key-value pairs 17,55 inserted\n");
printf("\n");
// 查找键对应的值
printf("find key 13 in created hashmap\n");
if(find(hashTable, 13)){
int value = get(hashTable, 13);
printf("Value: %d\n", value); // Output: 66
} else {
printf("key not found\n");
}
printf("find key 24 in created hashmap\n");
if(find(hashTable, 24)){
int value = get(hashTable, 24);
printf("Value: %d\n", value);
} else {
printf("key not found\n");
}
printf("\n");
printf("key-value pairs 3,99 changed to 3,100\n");
if(change(hashTable,3,99,100)){
printf("success!value now: %d\n",get(hashTable,3));
} else {
printf("fail!key-value pairs 3,99 not found\n");
}
printf("key-value pairs 2,99 changed to 2,100\n");
if(change(hashTable,2,99,100)){
printf("success!value: %d\n",get(hashTable,2));
} else {
printf("fail!key-value pairs 2,99 not found\n");
}
printf("\n");
if(deleteNode(hashTable,3,100)){
printf("key-value pairs 3,100 deleted\n");
} else {
printf("key-value pairs 3,100 not found\n");
}
find(hashTable,3) ? printf("key 3 : in hashmap\n") : printf("key 3 : not in hashmap\n");
find(hashTable,13) ? printf("key 13 : in hashmap\n") : printf("key 13 : not in hashmap\n");
printf("\n");
// free hash map
free(hashTable->table);
free(hashTable);
printf("hashmap freed\n");
return;
}
PRIV_SHELL_CMD_FUNCTION(TestHash, a hash test sample, PRIV_SHELL_CMD_MAIN_ATTR);
#endif

2
APP_Framework/Applications/main.c
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@ -20,7 +20,7 @@ extern int FrameworkInit();
extern void ApplicationOtaTaskInit(void);
int main(void)
{
printf("Hello, world! \n");
printf("Hello, world! \n Running on stm32f407-st-discovery\n");
FrameworkInit();
#ifdef APPLICATION_OTA
ApplicationOtaTaskInit();