#ifndef _DEBUG_MANAGE_H_
#define _DEBUG_MANAGE_H_/* 信息的调试级别,数值起小级别越高 */
#define APP_EMERG   "<0>"   /* system is unusable */
#define APP_ALERT   "<1>"   /* action must be taken immediately */
#define APP_CRIT    "<2>"   /* critical conditions */
#define APP_ERR     "<3>"   /* error conditions */
#define APP_WARNING "<4>"   /* warning conditions */
#define APP_NOTICE  "<5>"   /* normal but significant condition */
#define APP_INFO    "<6>"   /* informational */
#define APP_DEBUG   "<7>"   /* debug-level messages *//* 信息的默认调试级别 */
#define DEFAULT_DBGLEVEL  4typedef struct debug_opt
{char *name;int is_can_use;int (*debug_init)(void); /* 调试模块的初始化函数 */int (*debug_exit)(void); /* 退出函数 */int (*debug_print)(char *data); /* 输出函数 */struct debug_opt *next;
} debug_opt_t, *debug_t;int DebugRegister(debug_t node);
void DebugShow(void);
debug_t DebugGet(char *name);
int DebugSetLevel(char *buffer);
int DebugSetChannel(char *buffer);
int DebugInit(void);
int DebugPrint(const char *format, ...);
int DebugChannelInit(void);
int StdoutInit(void);#endif /* _DEBUG_MANAGE_H_ */

#include "debug_manage.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>static debug_t head;
static int debug_leval_limit = DEFAULT_DBGLEVEL;int DebugRegister(debug_t node)
{debug_t point;if(!head){head = node;head->next = NULL;}else{point = head;while(point->next){point = point->next;}point->next = node;node->next = NULL;}return 1;
}void DebugShow(void)
{int i = 0;debug_t point = head;while(point){DebugPrint("%02d %s\n", i++, point->name);point = point->next;}
}debug_t DebugGet(char * name)
{debug_t point = head;while(point){if(strcmp(point->name, name) == 0){return point;}point = point->next;}return NULL;
}int DebugSetLevel(char * buffer)
{debug_leval_limit = buffer[9] - '0';printf("debug_leval_limit = %d\r\n", debug_leval_limit);return 0;
}int DebugSetChannel(char * buffer)
{char *temp, name[100];debug_t point;temp = strchr(buffer, '=');if(!temp){return -1;}else{strncpy(name, buffer, temp - buffer);name[temp - buffer] = '\0';point = DebugGet(name);if(!point){return -1;}if(temp[1] == '0'){point->is_can_use = 0;}else{point->is_can_use = 1;}return 0;}
}int DebugPrint(const char * format, ...)
{char buffer[1000];char *temp;va_list list;int num;debug_t point = head;int debug_level = DEFAULT_DBGLEVEL;/* 可变参数的处理, 抄自glibc的printf函数 */va_start (list, format);num = vsprintf (buffer, format, list);va_end (list);buffer[num] = '\0';temp = buffer;/* 根据打印级别决定是否打印 */if ((buffer[0] == '<') && (buffer[2] == '>')){debug_level = buffer[1] - '0';if (debug_level >= 0 && debug_level <= 9){temp = buffer + 3;}else{debug_level = DEFAULT_DBGLEVEL;}}if (debug_level >= debug_leval_limit){return -1;}/* 调用链表中所有isCanUse为1的结构体的DebugPrint函数* 用来输出调试信息*/while (point){if (point->is_can_use){point->debug_print(temp);}point = point->next;}return 0;
}int DebugChannelInit(void)
{debug_t point = head;while(point){if(point->is_can_use && point->debug_init){point->debug_init();}point = point->next;}return 0;
}static int stdout_debug_print(char *data)
{printf("%s", data);return strlen(data);
}static debug_opt_t debug_stdout =
{.name = "stdout",.is_can_use = 1,.debug_print = stdout_debug_print,
};int StdoutInit(void)
{return DebugRegister(&debug_stdout);
}int DebugInit(void)
{int error;error = StdoutInit();
// error |= NetPrintInit();return error;
}int main(void)
{int error = DebugInit();printf("error: %d\n", error);DebugPrint("---------------\n");return 0;
}