.section .virtual, vtab .vtab_ULL1NRCOMMON_SPLIBPUSCHCOMMON_calc_crc24a: .dword #ULL1NRCOMMON_SPLIBPUSCHCOMMON_calc_crc24a 这段代码的含义
时间: 2023-08-04 13:04:39 浏览: 94
这段代码也是使用汇编语言写的,它的含义是在".virtual"段中定义了一个名为"vtab"的符号,并在这个符号的位置处定义了一个名为"calc_crc24a"的标签,这个标签代表的是一个32位整数(.dword指令表示定义一个32位整数)。
这个标签的值是"#ULL1NRCOMMON_SPLIBPUSCHCOMMON_calc_crc24a",这个值可能是一个宏定义或者常量定义,它所表示的是这个标签相对于虚拟地址空间起始地址的偏移量,具体的值需要在程序的其他位置进行定义。
这段代码的作用是在虚拟地址空间中定义了一个全局变量或者常量,这个变量的名称是"calc_crc24a",它的实际值需要在程序的其他位置进行定义。这个变量可以被其他代码引用,从而实现数据共享和传递。
相关问题
#include<iostream> #include<ctime> #include<chrono> #include<string> #include<filesystem> #include<fstream> #include<sstream> #include<thread> #include<boost/filesystem.hpp> const uintmax_t MAX_LOGS_SIZE = 10ull * 1024ull * 1024ull * 1024ull; //const uintmax_t MAX_LOGS_SIZE = 10ull; void create_folder(std::string folder_name) { boost::filesystem::create_directory(folder_name); std::string sub_foldername=folder_name+"/logs_ros"; boost::filesystem::create_directory(sub_foldername); } std::string get_current_time() { auto now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now); std::tm parts = *std::localtime(&now_c); char buffer[20]; std::strftime(buffer, sizeof(buffer), "%Y-%m-%d-%H-%M", &parts); return buffer; } void check_logs_size() { std::string logs_path = "/home/sage/logs/"; boost::filesystem::path logs_dir(logs_path); std::uintmax_t total_size = 0; for (const auto& file : boost::filesystem::recursive_directory_iterator(logs_dir)) { if (boost::filesystem::is_regular_file(file)) { total_size += boost::filesystem::file_size(file); } } if (total_size > MAX_LOGS_SIZE) { boost::filesystem::path earliest_dir; std::time_t earliest_time = std::time(nullptr); for (const auto& dir : boost::filesystem::directory_iterator(logs_dir)) { if (boost::filesystem::is_directory(dir)) { std::string dir_name = dir.path().filename().string(); std::tm time_parts = {}; std::istringstream ss(dir_name); std::string part; std::getline(ss, part, '-'); time_parts.tm_year = std::stoi(part) - 1900; std::getline(ss, part, '-'); time_parts.tm_mon = std::stoi(part) - 1; std::getline(ss, part, '-'); time_parts.tm_mday = std::stoi(part); std::getline(ss, part, '-'); time_parts.tm_hour = std::stoi(part); std::getline(ss, part, '-'); time_parts.tm_min = std::stoi(part); std::time_t dir_time = std::mktime(&time_parts); if (dir_time < earliest_time) { earliest_time = dir_time; earliest_dir = dir.path(); } } } if (!earliest_dir.empty()) { boost::filesystem::remove_all(earliest_dir); } } } int main() { std::string logs_path = "/home/sage/logs/"; while (true) { std::chrono::system_clock::time_point now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now); std::tm parts = *std::localtime(&now_c); if (parts.tm_min % 10 == 0) { std::string folder_name = logs_path + get_current_time(); create_folder(folder_name); } check_logs_size(); std::this_thread::sleep_for(std::chrono::minutes(1)); } return 0; }修改为ros节点
好的,我可以帮您将这段代码修改为ROS节点。首先,我们需要包含ROS所需的头文件,例如:
```cpp
#include <ros/ros.h>
```
然后,我们需要在main函数中初始化ROS节点:
```cpp
int main(int argc, char** argv) {
ros::init(argc, argv, "log_manager_node");
ros::NodeHandle nh;
// ...
return 0;
}
```
接下来,我们需要将定时任务和日志删除任务分别封装为ROS的定时器和服务。在main函数中,我们可以这样定义一个定时器:
```cpp
ros::Timer timer = nh.createTimer(ros::Duration(60.0), timerCallback);
```
其中,`timerCallback` 是一个你需要定义的回调函数,它将在每隔60秒被定时器调用一次。在回调函数中,你可以像之前的代码一样执行创建文件夹和检查日志大小的任务。
同样地,我们可以定义一个ROS服务来执行删除任务。我们需要在main函数中定义一个服务服务器:
```cpp
ros::ServiceServer delete_logs_server = nh.advertiseService("delete_logs", deleteLogsCallback);
```
其中,`deleteLogsCallback` 是一个你需要定义的服务回调函数,它将在收到删除日志服务请求时被调用。在回调函数中,你可以像之前的代码一样执行删除日志的任务。
最后,完整的ROS节点代码如下:
```cpp
#include <ros/ros.h>
#include <ctime>
#include <chrono>
#include <string>
#include <filesystem>
#include <fstream>
#include <sstream>
#include <thread>
#include <boost/filesystem.hpp>
const uintmax_t MAX_LOGS_SIZE = 10ull * 1024ull * 1024ull * 1024ull;
void create_folder(std::string folder_name) {
boost::filesystem::create_directory(folder_name);
std::string sub_foldername = folder_name + "/logs_ros";
boost::filesystem::create_directory(sub_foldername);
}
std::string get_current_time() {
auto now = std::chrono::system_clock::now();
std::time_t now_c = std::chrono::system_clock::to_time_t(now);
std::tm parts = *std::localtime(&now_c);
char buffer[20];
std::strftime(buffer, sizeof(buffer), "%Y-%m-%d-%H-%M", &parts);
return buffer;
}
void check_logs_size() {
std::string logs_path = "/home/sage/logs/";
boost::filesystem::path logs_dir(logs_path);
std::uintmax_t total_size = 0;
for (const auto& file : boost::filesystem::recursive_directory_iterator(logs_dir)) {
if (boost::filesystem::is_regular_file(file)) {
total_size += boost::filesystem::file_size(file);
}
}
if (total_size > MAX_LOGS_SIZE) {
boost::filesystem::path earliest_dir;
std::time_t earliest_time = std::time(nullptr);
for (const auto& dir : boost::filesystem::directory_iterator(logs_dir)) {
if (boost::filesystem::is_directory(dir)) {
std::string dir_name = dir.path().filename().string();
std::tm time_parts = {};
std::istringstream ss(dir_name);
std::string part;
std::getline(ss, part, '-');
time_parts.tm_year = std::stoi(part) - 1900;
std::getline(ss, part, '-');
time_parts.tm_mon = std::stoi(part) - 1;
std::getline(ss, part, '-');
time_parts.tm_mday = std::stoi(part);
std::getline(ss, part, '-');
time_parts.tm_hour = std::stoi(part);
std::getline(ss, part, '-');
time_parts.tm_min = std::stoi(part);
std::time_t dir_time = std::mktime(&time_parts);
if (dir_time < earliest_time) {
earliest_time = dir_time;
earliest_dir = dir.path();
}
}
}
if (!earliest_dir.empty()) {
boost::filesystem::remove_all(earliest_dir);
}
}
}
void timerCallback(const ros::TimerEvent& event) {
std::string logs_path = "/home/sage/logs/";
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::time_t now_c = std::chrono::system_clock::to_time_t(now);
std::tm parts = *std::localtime(&now_c);
if (parts.tm_min % 10 == 0) {
std::string folder_name = logs_path + get_current_time();
create_folder(folder_name);
}
check_logs_size();
}
bool deleteLogsCallback(std_srvs::Empty::Request& req, std_srvs::Empty::Response& res) {
std::string logs_path = "/home/sage/logs/";
boost::filesystem::path logs_dir(logs_path);
boost::filesystem::remove_all(logs_dir);
return true;
}
int main(int argc, char** argv) {
ros::init(argc, argv, "log_manager_node");
ros::NodeHandle nh;
ros::Timer timer = nh.createTimer(ros::Duration(60.0), timerCallback);
ros::ServiceServer delete_logs_server = nh.advertiseService("delete_logs", deleteLogsCallback);
ros::spin();
return 0;
}
```
在这个节点中,我们定义了一个名为 `log_manager_node` 的ROS节点,并在其中实现了一个定时器和一个服务。定时器每隔60秒检查一次日志大小并创建新的日志文件夹,服务则用于删除所有日志文件。
解释这段代码#include "qemu/osdep.h" #include "qapi/error.h" #include "ui/console.h" #include "hw/hw.h" #include "hw/boards.h" #include "hw/loader.h" #include "hw/display/framebuffer.h" #include "hw/arm/fsl-imx6ul.h" #include "ui/pixel_ops.h" //#include "hw/m68k/next-cube.h" #include "hw/gpio/imx_gpio.h" #include "hw/gpio/100ask_imx6ull_buttons.h" #include "ui/console.h" #include "ui/file.h" #include "ui/pic_operation.h" #include "ui/picfmt_manager.h" #include "ui/fonts.h" #include "ui/input.h" #include "ui/button_ui.h" /* * button1 : GPIO05_01 * button2 : GPIO01_18 * */ static int pin_to_button_map[][3] = { /* group, pin, button(0-button1, 1-button2) */ {5, 1, 0}, {1, 18, 1}, }; void notify_board_button_change(int index) { int group = pin_to_button_map[index][0]; int pin = pin_to_button_map[index][1]; int level = is_button_pressed(index); notify_imx_gpio_change(group, pin, level); } static void imx6ull_gpio_button_realize(DeviceState *dev, Error **errp) { button_ui_create(dev); } static void imx6ull_gpio_button_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); dc->realize = imx6ull_gpio_button_realize; } static const TypeInfo imx6ull_gpio_button_info = { .name = TYPE_BUTTON, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(ButtonState), .class_init = imx6ull_gpio_button_class_init, }; void create_imx6ull_buttons(void) { DeviceState *dev; dev = qdev_create(NULL, TYPE_BUTTON); qdev_init_nofail(dev); } static void imx6ull_gpio_button_register_types(void) { type_register_static(&imx6ull_gpio_button_info); } type_init(imx6ull_gpio_button_register_types)
这段代码的功能是生成一个长度为10的由随机数字组成的数组,然后再将这个数组中的数字按照从小到大的顺序排列并输出。首先定义了一个名为random_array的函数,该函数使用了python的内置模块random来生成随机数,并返回一个含有10个随机数的列表。然后在主程序中调用该函数并将其结果存储在变量nums中,接着使用了python的内置方法sorted对nums进行排序,最后用for循环遍历排好序的数组,并逐一输出每一个数字。
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