指定された長さの文字列を別の文字列の指定された位置-C言語に挿入

/*******************************************************************************
* @fn      Insert_String 
*
* @brief                          
*
* @param   oldstr     ； instr[]       ；location      ； length        
*
* @return  no
*******************************************************************************/
void Insert_String(char *oldstr, char instr[], int location, uint8_t length)
{
	int  j, k;
	char dat_tmp[100];
	
	for(j=0; j

char set_wifi[100] = "AT+CWJAP_DEF=\"wifi_name\",\"wifi_pswd\"\r
";//       

void WiFi_CFG(uint8_t *buf, uint16_t len)//              
{
     uint8_t date_len;
     static char set_wifi_head[100] = "AT+CWJAP_DEF=\"\",\"\"\r
";
     char set_wifi_name[20], set_wifi_pswd[20];
     static uint8_t name_date_len, pswd_date_len;//wifi    ，    

     date_len = len;
     memcpy(Wireless_Data_BLE.RX_data, buf, date_len);//Wireless_Data_BLE.RX_data            
    
     if(Wireless_Data_BLE.RX_data[0] == 'W')//  wifi  
     {
		memcpy(set_wifi_name, Wireless_Data_BLE.RX_data+2, date_len-2);//  wifi      
		name_date_len = date_len-2;//2     
		Insert_String(set_wifi_head, set_wifi_name, 15, name_date_len);//  wifi      
		//Ble_REC_Flag.wifi_name_ok = 1;
	}
	else if(Wireless_Data_BLE.RX_data[0] == 'P')//  wifi  
	{
		memcpy(set_wifi_pswd, Wireless_Data_BLE.RX_data+2, date_len-2);//  wifi      
		pswd_date_len = date_len-2;//2     
		Insert_String(set_wifi_head, set_wifi_pswd, 18+name_date_len, pswd_date_len);//  wifi      
		//Ble_REC_Flag.wifi_pswd_ok = 1;
		
		memset(set_wifi, 0, sizeof(set_wifi)); //  wifi  
		strcpy(set_wifi, set_wifi_head);//  wifi  
	}
			
	memcpy(Wireless_Data_BLE.TX_data, Wireless_Data_BLE.RX_data, date_len);//   
	Wireless_Data_BLE.TX_length = date_len;
	
        memset(Wireless_Data_WiFi.RX_data, 0, date_len); //    

  }     
}