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【C】打印调试信息的宏
作者:LSGX / 发布于2015/1/22/ 672

	/* ************************************************************************
	* Filename: debug_pos.h
	* Description: Debugging error message positioning
	* Version: 1.0
	* Created: 2014-11-14 22:55:26
	* Revision: none
	* Compiler: gcc
	* Author: lsgx
	* Company: lsgx
	* ************************************************************************/
	
	#ifndef __DEBUG_POS_H__
	#define __DEBUG_POS_H__
	
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <ctype.h>
	#include <sys/types.h>
	#include <time.h>
	
	enum DEBUG_LEVEL_ENUM {
	 DEBUG_EMERG = 0,
	 DEBUG_ALERT,
	 DEBUG_CRIT,
	 DEBUG_ERR,
	 DEBUG_WARNING,
	 DEBUG_NOTICE,
	 DEBUG_INFO,
	 DEBUG_DEBUG
	};
	
	#define DEBUG_EMERG_TITLE "DEBUG_EMERG" /* system is unusable */ /* 紧急事件消息，系统崩溃之前提示，表示系统不可用 */
	#define DEBUG_ALERT_TITLE "DEBUG_ALERT" /* action must be taken immediately */ /* 报告消息，表示必须立即采取措施 */
	#define DEBUG_CRIT_TITLE "DEBUG_CRIT" /* critical conditions */ /* 临界条件，通常涉及严重的硬件或软件操作失败 */
	#define DEBUG_ERR_TITLE "DEBUG_ERR" /* error conditions */ /* 错误条件，驱动程序常用KERN_ERR来报告硬件的错误 */
	#define DEBUG_WARNING_TITLE "DEBUG_WARNING" /* warning conditions */ /* 警告条件，对可能出现问题的情况进行警告 */
	#define DEBUG_NOTICE_TITLE "DEBUG_NOTICE" /* normal but significant condition */ /* 正常但又重要的条件，用于提醒 */
	#define DEBUG_INFO_TITLE "DEBUG_INFO" /* informational */ /* 提示信息，如驱动程序启动时，打印硬件信息 */
	#define DEBUG_DEBUG_TITLE "DEBUG_DEBUG" /* debug-level messages */ /* 调试级别的消息 */
	
	#define MAX_TITLE_LEN 20
	#define MIN_TIME_LEN 20
	#define MAX_DEBUG_LEVEL DEBUG_DEBUG
	#define MIN_DEBUG_LEVEL DEBUG_EMERG
	#define MAX_DEBUG_COUNT (MAX_DEBUG_LEVEL - MIN_DEBUG_LEVEL + 1)
	#define DEBUG_POS_LOG "debug_pos.log"
	#define DEBUG_SER_NAME "DEBUG"
	#define DEBUG_KILL_STAT 1
	#define LIMIT_KILL_TITLE DEBUG_ERR_TITLE
	#define LIMIT_KILL_LEVEL DEBUG_ERR
	
	static struct DEBUG_STR {
	 enum DEBUG_LEVEL_ENUM level;
	 const char title[MAX_TITLE_LEN];
	} DEBUG_STR_ITEM[MAX_DEBUG_COUNT] = {
	 {DEBUG_EMERG, DEBUG_EMERG_TITLE},
	 {DEBUG_ALERT, DEBUG_ALERT_TITLE},
	 {DEBUG_CRIT, DEBUG_CRIT_TITLE},
	 {DEBUG_ERR, DEBUG_ERR_TITLE},
	 {DEBUG_WARNING, DEBUG_WARNING_TITLE},
	 {DEBUG_NOTICE, DEBUG_NOTICE_TITLE},
	 {DEBUG_INFO, DEBUG_INFO_TITLE},
	 {DEBUG_DEBUG, DEBUG_DEBUG_TITLE}
	};
	
	static int system_digital_time(char * time_str, size_t str_len)
	{
	 if (str_len < MIN_TIME_LEN) {
	 perror("time_str buffer size to low\n");
	 return -1;
	 }
	
	 time_t now = time((time_t *)NULL);
	 struct tm * time_now = localtime(&now);
	
	 memset(time_str, '\0', str_len);
	 snprintf(time_str, str_len, "%4d-%02d-%02d %02d:%02d:%02d",
	 time_now->tm_year + 1900,
	 time_now->tm_mon + 1,
	 time_now->tm_mday,
	 time_now->tm_hour,
	 time_now->tm_min,
	 time_now->tm_sec);
	
	 return (strlen(time_str));
	}
	
	static int get_process_name(char *process_name, size_t name_len)
	{
	 int ret = -1;
	 FILE *fp = NULL;
	 char cmd[32] = {'\0'};
	 char *buffer = NULL;
	 long int len = -1;
	 int pid_real = -1;
	 int pid_cmp = -1;
	
	 pid_real = getpid();
	 memset(cmd, '\0', sizeof(cmd));
	 snprintf(cmd, sizeof(cmd)-1, "ps -wax | grep %d", pid_real);
	 fp = popen(cmd, "r");
	 if (fp == NULL) {
	 perror("popen fail!\n");
	 ret = -1;
	 goto OUT;
	 }
	
	 len = 510;
	 buffer = (char *)malloc(sizeof(char) * (len + 2));
	 if (buffer == NULL) {
	 perror("malloc fail!\n");
	 ret = -1;
	 goto OUT;
	 }
	
	 memset(buffer, '\0', len + 2);
	 while(fgets(buffer, len + 2, fp) != NULL) {
	 if (sscanf(buffer, "%d", &pid_cmp) == EOF) {
	 perror("sscanf pid_cmp fail!\n");
	 ret = -1;
	 goto OUT;
	 }
	 if (pid_real == pid_cmp) {
	 char *temp1 = buffer;
	 char *temp2 = NULL;
	 while((temp2 = strchr(temp1, ' ')) != NULL) {
	 temp1 = temp2 + 1;
	 }
	 if (name_len < strlen(temp1)) {
	 perror("process_name size to low!\n");
	 ret = -1;
	 goto OUT;
	 }
	 strncpy(process_name, temp1, strlen(temp1) - 1);
	 ret = strlen(process_name);
	 break;
	 }
	 pid_cmp = -1;
	 memset(buffer, '\0', len + 1);
	 }
	
	OUT:
	 if (buffer != NULL) {
	 free(buffer);
	 buffer = NULL;
	 }
	 if (fp != NULL) {
	 pclose(fp);
	 fp = NULL;
	 }
	 return ret;
	}
	
	static unsigned long int debug_count = 0;
	
	// #define DEBUG_POS_HIDE
	#ifndef DEBUG_POS_HIDE
	
	#define DEBUG_POS(debug_level, ...) do { \
	 if (debug_level >= MIN_DEBUG_LEVEL && debug_level <= MAX_DEBUG_LEVEL) { \
	 unsigned int debug_exit_stat = 0; \
	 FILE * debug_pos_fp = NULL; \
	 debug_pos_fp = fopen(DEBUG_POS_LOG, "a+"); \
	 char time_str[20] = {'\0'}; \
	 system_digital_time(time_str, sizeof(time_str)); \
	 char process_name[20] = {'\0'}; \
	 get_process_name(process_name, sizeof(process_name)); \
	 debug_count++; \
	 fprintf(debug_pos_fp, "[***|%s|***] [title: %s, time: %s, count: %lu]\n\t[file_name: %s, function_name: %s, line_no: %d]\n\t>>>>", \
	 process_name, DEBUG_STR_ITEM[debug_level].title, time_str, debug_count, __FILE__, __FUNCTION__, __LINE__); \
	 fprintf(debug_pos_fp, __VA_ARGS__); \
	 fputc('\n', debug_pos_fp); \
	 if (debug_level <= LIMIT_KILL_LEVEL) { \
	 fprintf(debug_pos_fp, "%s", "\t>>>>******|debug exit abort process|******\n"); \
	 debug_exit_stat = DEBUG_KILL_STAT; \
	 } \
	 fclose(debug_pos_fp); \
	 if (debug_exit_stat == DEBUG_KILL_STAT) { \
	 abort(); \
	 } \
	 } \
	} while(0)
	
	#else
	
	#define DEBUG_POS(debug_level, ...) NULL
	
	#endif // DEBUG_POS_HIDE
	
	
	#define DEBUG_ASSERT(condition, ...) do { \
	 if (condition) { \
	 NULL; \
	 } else { \
	 DEBUG_POS(DEBUG_ERR, __VA_ARGS__); \
	 } \
	} while(0)
	
	#endif // __DEBUG_POS_H__

	

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	
	// #define DEBUG_POS_HIDE
	#include "debug_pos.h"
	
	
	int main(int argc, char *argv[])
	{
	 DEBUG_POS(DEBUG_INFO, "调试打印消息");
	 DEBUG_POS(DEBUG_WARNING, "调试警告消息");
	 DEBUG_ASSERT(1, "断言成功消息");
	 DEBUG_ASSERT(0, "断言失败消息");
	
	 return 0;
	}
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