# C语言日志库logging

[English](README.en.md)

## 简介

logging是一个轻量级的简单易用C语言日志库，支持日志级别、日志格式、日志输出、日志文件等功能。

## 功能

- 支持日志级别：DEBUG、INFO、WARN、ERROR、FATAL
- 支持日志格式：时间戳、日志级别、日志内容
- 支持日志输出：控制台、文件
- 支持日志文件：自动创建、自动滚动、日志分割

## 安装
### conan安装使用
```shell
git clone https://github.com/WangZhongDian/logging.git
cd logging
conan create . 
```
在你的项目的conanfile.txt中添加
```txt
[requires]
logging/0.5.0
```

```shell
conan install . --build=missing
```

### cmake安装使用
```shell
git clone https://github.com/WangZhongDian/logging.git
cd logging
cmake build -B build . && cd build && cmake --build .
cmake --install .
```

## 使用方法
![](docs/img/2024-09-21-11-44-25.png)
![](docs/img/2024-09-21-11-44-06.png)

### 控制台日志
```c
#include "logging.h"

int main() {
    Log_info("This is an info message");
    Log_error("This is an error message%s", "123");
    Log_fatal("This is an fatal message");
    Log_debug("This is a debug message");
    Log_warning("This is a warning message%s", "123");

    destroyDefaultLogger();
    return 0;
}
```

### 文件日志
```c
#include "logging.h"
#include "logging/logging-handler.h"

int main() {
    log_Handler *hander = loggingHandlerFile("test_log", 1024 * 1024 * 10);
    addHandler(getDefaultLogger(), hander);

    Log_info("This is an info message");
    Log_error("This is an error message%s", "123");
    Log_fatal("This is an fatal message");
    Log_debug("This is a debug message");
    Log_warning("This is a warning message%s", "123");

    destroyDefaultLogger();
    return 0;
}
```

### 日志过滤器
> 支持添加自定义的过滤器， 目前内置了子串过滤器

> 过滤器的作用:可以将过滤到的日志重定向到过滤器的专属处理器中

#### 多个子串过滤器
```c
#include "logging.h"
#include "logging/logging-core.h"
#include "logging/logging-filter.h"
#include <stdbool.h>
#include <stdio.h>
#include <time.h>

int main() {
    Log_info("This is an info message");
    Log_error("This is an error message%s", "123");
    Log_fatal("This is an fatal message");
    Log_debug("This is a debug message");
    Log_warning("This is a warning message%s", "123");

    char *test1[] = {"This", NULL};

    log_filter *tint =
        loggingFilterSubStr(test1,
                            LOG_DEBUG,
                            loggingHandlerFile("test_interceptor", 1024 * 1024),
                            false);

    addFilter(getDefaultLogger(), tint);

    char *test2[]     = {"123", NULL};

    log_filter *tint1 = loggingFilterSubStr(
        test2,
        LOG_ERROR,
        loggingHandlerFile("test_interceptor1", 1024 * 1024),
        true);

    addFilter(getDefaultLogger(), tint1);

    printf("\n");
    printf("filter added\n");
    printf("\n");

    Log_info("This is an info message");
    Log_error("This is an error message%s", "123");
    Log_fatal("This is an fatal message");
    Log_debug("This is a debug message");
    Log_warning("This is a warning message%s", "123");

    destroyDefaultLogger();
    return 0;
}
```