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Signed-off-by: armink <armink.ztl@gmail.com>
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armink 2015-05-09 12:15:34 +08:00
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<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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# EasyLogger
---
# 1. 介绍
EasyLogger是一款超轻量级(ROM<1.6K, RAM<0.3k)、高性能的C日志库，非常适合对资源敏感的嵌入式软件。相比log4c、zlog这些知名的C日志库，EasyLogger的功能更加简单，提供给用户的接口更少，但上手会很快，也非常适合应用于小型的非嵌入式软件。EasyLogger主要特性如下：
- 支持多种输出方式（终端、文件、串口、485、Flash...）；
- 日志内容可包含级别、时间戳、线程、进程信息；
- 日志输出被设计为线程安全的方式；
- 支持多种操作系统（[RT-Thread](http://www.rt-thread.org/)、UCOS、Linux、Windows...），也支持裸机平台；
- 日志支持 **RAW格式** [^raw]，可设定按 **标签** [^tag]进行过滤。
# 2. 使用
### 2.1 参数配置
EasyLogger拥有过滤方式、输出格式、输出开关这些属性。
- 过滤方式支持按照标签、级别、关键词进行过滤；
- 可以动态的开启/关闭日志的输出；
- 可设定动态和静态的输出级别（静态：一级开关，通过宏定义；动态：二级开关，通过API接口）。
> 注：目前参数配置及输出方式都是单例模式，即全局只支持一种配置方式。此模式下，软件会较为简单，但是无法支持复杂的输出方式。
### 2.2 输出级别
参考Android Logcat，级别最高为0(Assert)，最小为5(Verbose)。
```
0.[A]：断言(Assert)
1.[E]：错误(Error)
2.[W]：警告(Warn)
3.[I]：信息(Info)
4.[D]：调试(Debug)
5.[V]：详细(Verbose)
```
### 2.3 输出过滤
#### 2.3.1 过滤级别
默认过滤级别为5(详细)，用户可以任意设置。在设置高优先级后，低优先级的日志将不会输出。例如：设置当前过滤的优先级为3(警告)，则只会输出优先级别为警告、错误、断言的日志。
#### 2.3.2 过滤标签
默认过滤标签为空字符串("")，即不过滤。当前输出日志的标签会与过滤标签做字符串匹配，日志的标签包含过滤标签，则该输出该日志。例如：设置过滤标签为WiFi，则系统中包含WiFi字样标签的（WiFi.BSP、WiFi.Protocol、Setting.WiFi）日志都会被输出。
#### 2.3.3 过滤关键词
默认过滤关键词为空字符串("")，即不过滤。检索当前输出日志中是否包含该关键词，包含则允许输出。
> 注：对于配置较低的MCU建议不开启关键词过滤（默认为不过滤），增加关键字过滤将会在很大程度上减低日志的输出效率。实际上过滤关键词功能交给上位机做会更轻松，所以后期的跨平台日志助手开发完成后，就无需该功能。
### 2.4 输出格式
输出格式支持：级别、时间、标签、进程信息、线程信息、文件路径、行号、方法名
> 注：默认为 **RAW格式**，RAW格式日志不支持标签过滤
### 2.5 输出方式
通过用户的移植，可以支持任何一种输出方式。只不过对于某种输出方式可能引入的新功能，目前需要用户自己实现，例如：文件转存，检索Flash日志等等。这些属于日志功能附带小工具，后期会以插件的形式逐步开源出来。下面简单对比下部分输出方式使用场景：
- 终端：方便用户动态查看，不具有存储功能；
- 文件与Flash：都具有存储功能，用户可以查看历史日志。但是文件方式需要文件系统的支持，而Flash方式更加适合应用在无文件系统的小型嵌入式设备中。
> 注：
1、文件与Flash输出方式的插件优先级较低，会在后期实现；
2、以上内容对应的API，可以打开[思维导图](http://naotu.baidu.com/viewshare.html?shareId=ausqm3j44f4k)看到更清晰的逻辑。
# 3. 后期
- 1、Flash存储：在[EasyFlash](https://github.com/armink/EasyFlash)[^EasyFlash]中增加日志存储、读取功能，让EasyLogger与其无缝对接。使日志可以更加容易的存储在 **非文件系统** 中，并具有历史日检索的功能；
- 2、异步输出：目前日志输出与用户代码之间是同步的方式，这种方式虽然软件简单，也不存在日志覆盖的问题。但在输出速度较低的平台下，会由于增加日志功能，而降低软件运行速度。所以后期会增加 **异步输出** 方式，关键字过滤也会放到异步输出中去；
- 3、日志助手：开发跨平台的日志助手，兼容Linux、Windows、Mac系统，打开助手即可查看、过滤（支持正则表达式）、排序、保存日志等，计划使用[NW.js](http://www.oschina.net/p/nwjs)框架；
- 4、文件转档：文件系统下支持文件按容量转档，按时间区分；
- 5、配置文件：文件系统下的配置文件；
- 6、Arduino：增加Arduino lib，并提供其Demo；
# 4. 许可
GPL v3.0 Copyright (c) armink.ztl@gmail.com
[^raw]:未经过格式化的原始日志。
[^tag]:在软件中可以按照文件、模块、功能等方面，对需要打印的日志设定标签，实现日志分类。
[^EasyFlash]:一个我开源的轻量级嵌入式Flash闪存库([Github](https://github.com/armink/EasyFlash)|[OSChina](http://git.oschina.net/armink/EasyFlash)|[Coding](https://coding.net/u/armink/p/EasyFlash/git))。

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/*
* This file is part of the EasyLogger Library.
*
* Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Function: Is is an head file for this library. You can see all be called functions.
* Created on: 2015-04-28
*/
#ifndef __ELOG_H__
#define __ELOG_H__
#include "types.h"
/* output log's level */
#define ELOG_LVL_ASSERT 0
#define ELOG_LVL_ERROR 1
#define ELOG_LVL_WARN 2
#define ELOG_LVL_INFO 3
#define ELOG_LVL_DEBUG 4
#define ELOG_LVL_VERBOSE 5
/* setting static output log level. default is verbose */
#define ELOG_OUTPUT_LVL ELOG_LVL_VERBOSE
/* enable log output. default open this macro */
#define ELOG_OUTPUT_ENABLE
/* using output to file mode */
#define ELOG_USING_OUTPUT_FILE
/* output line number max length */
#define ELOG_LINE_NUM_MAX_LEN 5
/* log buffer size */
#define ELOG_BUF_SIZE 256
/* output filter's tag max length */
#define ELOG_FILTER_TAG_MAX_LEN 16
/* output filter's keyword max length */
#define ELOG_FILTER_KW_MAX_LEN 16
/* EasyLogger software version number */
#define ELOG_SW_VERSION "0.05.02"
/* EasyLogger assert for developer. */
#define ELOG_ASSERT(EXPR) \
if (!(EXPR)) \
{ \
elog_a("ELOG", "(%s) has assert failed at %s.\n", #EXPR, __FUNCTION__); \
while (1); \
}
/* all formats index */
typedef enum {
ELOG_FMT_LVL = 1 << 0, /**< level */
ELOG_FMT_TAG = 1 << 1, /**< tag */
ELOG_FMT_TIME = 1 << 2, /**< current time */
ELOG_FMT_P_INFO = 1 << 3, /**< process info */
ELOG_FMT_T_INFO = 1 << 4, /**< thread info */
ELOG_FMT_DIR = 1 << 5, /**< file directory and name */
ELOG_FMT_FUNC = 1 << 6, /**< function name */
ELOG_FMT_LINE = 1 << 7, /**< line number */
} ElogFmtIndex;
/* EasyLogger error code */
typedef enum {
ELOG_NO_ERR,
} ElogErrCode;
/* elog.c */
ElogErrCode elog_init(void);
void elog_set_output_enabled(bool_t enabled);
bool_t elog_get_output_enabled(void);
void elog_set_fmt(size_t set);
void elog_set_filter(uint8_t level, const char *tag, const char *keyword);
void elog_set_filter_lvl(uint8_t level);
void elog_set_filter_tag(const char *tag);
void elog_set_filter_kw(const char *keyword);
void elog_raw(const char *format, ...);
void elog_output(uint8_t level, const char *tag, const char *file, const char *func,
const long line, const char *format, ...);
#ifndef ELOG_OUTPUT_ENABLE
#define elog_a(tag, ...)
#define elog_e(tag, ...)
#define elog_w(tag, ...)
#define elog_i(tag, ...)
#define elog_d(tag, ...)
#define elog_v(tag, ...)
#else /* ELOG_OUTPUT_ENABLE */
#if ELOG_OUTPUT_LVL >= ELOG_LVL_ASSERT
#define elog_a(tag, ...) \
elog_output(ELOG_LVL_ASSERT, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#else
#define elog_a(tag, ...)
#endif
#if ELOG_OUTPUT_LVL >= ELOG_LVL_ERROR
#define elog_e(tag, ...) \
elog_output(ELOG_LVL_ERROR, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#else
#define elog_e(tag, ...)
#endif
#if ELOG_OUTPUT_LVL >= ELOG_LVL_WARN
#define elog_w(tag, ...) \
elog_output(ELOG_LVL_WARN, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#else
#define elog_w(tag, ...)
#endif
#if ELOG_OUTPUT_LVL >= ELOG_LVL_INFO
#define elog_i(tag, ...) \
elog_output(ELOG_LVL_INFO, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#else
#define elog_i(tag, ...)
#endif
#if ELOG_OUTPUT_LVL >= ELOG_LVL_DEBUG
#define elog_d(tag, ...) \
elog_output(ELOG_LVL_DEBUG, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#else
#define elog_d(tag, ...)
#endif
#if ELOG_OUTPUT_LVL == ELOG_LVL_VERBOSE
#define elog_v(tag, ...) \
elog_output(ELOG_LVL_VERBOSE, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
#endif
#endif /* ELOG_OUTPUT_ENABLE */
/* elog_utils.c */
size_t elog_strcpy(size_t cur_len, char *dst, const char *src);
/* elog_port.c */
ElogErrCode elog_port_init(void);
void elog_port_output(const char *output, size_t size);
void elog_port_output_lock(void);
void elog_port_output_unlock(void);
const char *elog_port_get_time(void);
const char *elog_port_get_p_info(void);
const char *elog_port_get_t_info(void);
#endif /* __ELOG_H__ */

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/*
* This file is part of the EasyLogger Library.
*
* Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Function: Portable interface for each platform.
* Created on: 2015-04-28
*/
#include "elog.h"
/**
* EasyLogger port initialize
*
* @return result
*/
ElogErrCode elog_port_init(void) {
ElogErrCode result = ELOG_NO_ERR;
//add your code here
return result;
}
/**
* output log port interface
*/
void elog_port_output(const char *output, size_t size) {
//add your code here
}
/**
* output lock
*/
void elog_port_output_lock(void) {
//add your code here
}
/**
* output unlock
*/
void elog_port_output_unlock(void) {
//add your code here
}
/**
* get current time interface
*
* @return current time
*/
const char *elog_port_get_time(void) {
//add your code here
}
/**
* get current process name interface
*
* @return current process name
*/
const char *elog_port_get_p_info(void) {
//add your code here
}
/**
* get current thread name interface
*
* @return current thread name
*/
const char *elog_port_get_t_info(void) {
//add your code here
}

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/*
* This file is part of the EasyLogger Library.
*
* Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Function: Initialize function and other general function.
* Created on: 2015-04-28
*/
#include "elog.h"
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
/* output log's filter */
typedef struct {
uint8_t level;
char tag[ELOG_FILTER_TAG_MAX_LEN + 1];
char keyword[ELOG_FILTER_KW_MAX_LEN + 1];
} ElogFilter, *ElogFilter_t;
/* easy logger */
typedef struct {
ElogFilter filter;
size_t enabled_fmt_set;
bool_t output_enabled;
}EasyLogger, *EasyLogger_t;
/* EasyLogger object */
static EasyLogger elog;
/* log buffer */
static char log_buf[ELOG_BUF_SIZE] = { 0 };
/* log tag */
static const char *tag = "ELOG";
/* level output info */
static const char *level_output_info[] = {
"A/",
"E/",
"W/",
"I/",
"D/",
"V/",
};
static bool_t get_fmt_enabled(size_t set);
/**
* EasyLogger initialize.
*
* @return result
*/
ElogErrCode elog_init(void) {
ElogErrCode result = ELOG_NO_ERR;
/* port initialize */
result = elog_port_init();
/* set level is ELOG_LVL_VERBOSE */
elog_set_filter_lvl(ELOG_LVL_VERBOSE);
/* enable output */
elog_set_output_enabled(TRUE);
if (result == ELOG_NO_ERR) {
elog_d(tag, "EasyLogger V%s is initialize success.", ELOG_SW_VERSION);
} else {
elog_d(tag, "EasyLogger V%s is initialize fail.", ELOG_SW_VERSION);
}
return result;
}
/**
* set output enable or disable
*
* @param enabled TRUE: enable FALSE: disable
*/
void elog_set_output_enabled(bool_t enabled) {
ELOG_ASSERT((enabled == FALSE) || (enabled == TRUE));
elog.output_enabled = enabled;
}
/**
* get output is enable or disable
*
* @return enable or disable
*/
bool_t elog_get_output_enabled(void) {
return elog.output_enabled;
}
/**
* set log output format. only enable or disable
*
* @param set format set
*/
void elog_set_fmt(size_t set) {
elog.enabled_fmt_set = set;
}
/**
* set log filter all parameter
*
* @param level level
* @param tag tag
* @param keyword keyword
*/
void elog_set_filter(uint8_t level, const char *tag, const char *keyword) {
ELOG_ASSERT(level <= ELOG_LVL_VERBOSE);
elog_set_filter_lvl(level);
elog_set_filter_tag(tag);
elog_set_filter_kw(keyword);
}
/**
* set log filter's level
*
* @param level level
*/
void elog_set_filter_lvl(uint8_t level) {
ELOG_ASSERT(level <= ELOG_LVL_VERBOSE);
elog.filter.level = level;
}
/**
* set log filter's tag
*
* @param tag tag
*/
void elog_set_filter_tag(const char *tag) {
strncpy(elog.filter.tag, tag, ELOG_FILTER_TAG_MAX_LEN);
}
/**
* set log filter's keyword
*
* @param keyword keyword
*/
void elog_set_filter_kw(const char *keyword) {
strncpy(elog.filter.keyword, keyword, ELOG_FILTER_KW_MAX_LEN);
}
/**
* output RAW format log
*
* @param format output format
* @param ... args
*/
void elog_raw(const char *format, ...) {
va_list args;
int fmt_result;
/* check output enabled */
if (!elog.output_enabled) {
return;
}
/* args point to the first variable parameter */
va_start(args, format);
/* lock output */
elog_port_output_lock();
/* package log data to buffer */
fmt_result = vsnprintf(log_buf, ELOG_BUF_SIZE, format, args);
/* output converted log */
if ((fmt_result > -1) && (fmt_result <= ELOG_BUF_SIZE)) {
/* output log */
elog_port_output(log_buf, fmt_result);
} else {
/* output log */
elog_port_output(log_buf, ELOG_BUF_SIZE);
}
/* unlock output */
elog_port_output_unlock();
va_end(args);
}
/**
* output the log
*
* @param level level
* @param tag tag
* @param file file name
* @param func function name
* @param line line number
* @param format output format
* @param ... args
*
*/
void elog_output(uint8_t level, const char *tag, const char *file, const char *func,
const long line, const char *format, ...) {
size_t tag_len = strlen(tag), log_len = 0;
char line_num[ELOG_LINE_NUM_MAX_LEN] = { 0 };
va_list args;
int fmt_result;
ELOG_ASSERT(level <= ELOG_LVL_VERBOSE);
/* check output enabled */
if (!elog.output_enabled) {
return;
}
/* level filter */
if (level > elog.filter.level) {
return;
} else if (!strstr(tag, elog.filter.tag)) { /* tag filter */
//TODO <20><><EFBFBD>Կ<EFBFBD><D4BF>Dz<EFBFBD><C7B2><EFBFBD>KMP<4D><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽƥ<CABD><C6A5><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
return;
}
/* args point to the first variable parameter */
va_start(args, format);
/* lock output */
elog_port_output_lock();
/* package level info */
if (get_fmt_enabled(ELOG_FMT_LVL)) {
log_len += elog_strcpy(log_len, log_buf + log_len, level_output_info[level]);
}
/* package tag info */
if (get_fmt_enabled(ELOG_FMT_TAG)) {
log_len += elog_strcpy(log_len, log_buf + log_len, tag);
/* if the tag length is less than 50% ELOG_FILTER_TAG_MAX_LEN, then fill space */
if (tag_len <= ELOG_FILTER_TAG_MAX_LEN / 2) {
// memset(log_buf + log_len, ' ', ELOG_FILTER_TAG_MAX_LEN / 2 - tag_len);
// log_len += ELOG_FILTER_TAG_MAX_LEN / 2 - tag_len;
}
log_len += elog_strcpy(log_len, log_buf + log_len, " ");
}
/* package time, process and thread info */
if (get_fmt_enabled(ELOG_FMT_TIME) || get_fmt_enabled(ELOG_FMT_P_INFO)
|| get_fmt_enabled(ELOG_FMT_T_INFO)) {
log_len += elog_strcpy(log_len, log_buf + log_len, "[");
/* package time info */
if (get_fmt_enabled(ELOG_FMT_TIME)) {
log_len += elog_strcpy(log_len, log_buf + log_len, elog_port_get_time());
if (get_fmt_enabled(ELOG_FMT_P_INFO) || get_fmt_enabled(ELOG_FMT_T_INFO)) {
log_len += elog_strcpy(log_len, log_buf + log_len, " ");
}
}
/* package process info */
if (get_fmt_enabled(ELOG_FMT_P_INFO)) {
log_len += elog_strcpy(log_len, log_buf + log_len, elog_port_get_p_info());
if (get_fmt_enabled(ELOG_FMT_T_INFO)) {
log_len += elog_strcpy(log_len, log_buf + log_len, " ");
}
}
/* package thread info */
if (get_fmt_enabled(ELOG_FMT_T_INFO)) {
log_len += elog_strcpy(log_len, log_buf + log_len, elog_port_get_t_info());
}
log_len += elog_strcpy(log_len, log_buf + log_len, "] ");
}
/* package file directory and name, function name and line number info */
if (get_fmt_enabled(ELOG_FMT_DIR) || get_fmt_enabled(ELOG_FMT_FUNC)
|| get_fmt_enabled(ELOG_FMT_LINE)) {
log_len += elog_strcpy(log_len, log_buf + log_len, "(");
/* package time info */
if (get_fmt_enabled(ELOG_FMT_DIR)) {
log_len += elog_strcpy(log_len, log_buf + log_len, file);
if (get_fmt_enabled(ELOG_FMT_FUNC)) {
log_len += elog_strcpy(log_len, log_buf + log_len, " ");
} else if (get_fmt_enabled(ELOG_FMT_LINE)) {
log_len += elog_strcpy(log_len, log_buf + log_len, ":");
}
}
/* package process info */
if (get_fmt_enabled(ELOG_FMT_FUNC)) {
log_len += elog_strcpy(log_len, log_buf + log_len, func);
if (get_fmt_enabled(ELOG_FMT_LINE)) {
log_len += elog_strcpy(log_len, log_buf + log_len, ":");
}
}
/* package thread info */
if (get_fmt_enabled(ELOG_FMT_LINE)) {
//TODO snprintf<74><66>Դռ<D4B4>ÿ<EFBFBD><C3BF>ܽϸߣ<CFB8><DFA3><EFBFBD><EFBFBD>Ż<EFBFBD>
snprintf(line_num, ELOG_LINE_NUM_MAX_LEN, "%ld", line);
log_len += elog_strcpy(log_len, log_buf + log_len, line_num);
}
log_len += elog_strcpy(log_len, log_buf + log_len, ") ");
}
/* add space and colon sign */
if (log_len != 0) {
log_len += elog_strcpy(log_len, log_buf + log_len, ": ");
}
/* package other log data to buffer. CRLF length is 2. */
fmt_result = vsnprintf(log_buf + log_len, ELOG_BUF_SIZE - log_len - 2, format, args);
/* keyword filter */
if (!strstr(log_buf, elog.filter.keyword)) {
//TODO <20><><EFBFBD>Կ<EFBFBD><D4BF>Dz<EFBFBD><C7B2><EFBFBD>KMP<4D><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽƥ<CABD><C6A5><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
return;
}
/* package end sign( CRLF and '\0' ) */
if ((fmt_result > -1) && (fmt_result + log_len + 2 < ELOG_BUF_SIZE)) {
log_len += fmt_result;
/* add CRLF */
log_len += elog_strcpy(log_len, log_buf + log_len, "\r\n");
/* add '\0' */
log_buf[log_len++] = '\0';
} else {
/* add CRLF */
log_buf[ELOG_BUF_SIZE - 3] = '\r';
log_buf[ELOG_BUF_SIZE - 2] = '\n';
/* add log end sign */
log_buf[ELOG_BUF_SIZE - 1] = '\0';
}
/* output log */
elog_port_output(log_buf, log_len);
/* unlock output */
elog_port_output_unlock();
va_end(args);
}
/**
* get format enabled
*
* @param set format set
*
* @return enable or disable
*/
static bool_t get_fmt_enabled(size_t set) {
if (elog.enabled_fmt_set & set) {
return TRUE;
} else {
return FALSE;
}
}

45
easylogger/src/elog_utils.c Normal file
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@ -0,0 +1,45 @@
/*
* This file is part of the EasyLogger Library.
*
* Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Function: Some utils for this library.
* Created on: 2015-04-28
*/
#include "elog.h"
/**
* another copy string function
*
* @param cur_len current copied log length, max size is ELOG_BUF_SIZE
* @param dst destination
* @param src source
*
* @return copied length
*/
size_t elog_strcpy(size_t cur_len, char *dst, const char *src) {
const char *src_old = src;
while (*src != 0) {
/* make sure destination has enough space */
if (cur_len++ < ELOG_BUF_SIZE) {
*dst++ = *src++;
} else {
break;
}
}
return src - src_old;
}