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hlog.c
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#include "hlog.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
//#include "hmutex.h"
#ifdef _WIN32
#include <windows.h>
#define hmutex_t CRITICAL_SECTION
#define hmutex_init InitializeCriticalSection
#define hmutex_destroy DeleteCriticalSection
#define hmutex_lock EnterCriticalSection
#define hmutex_unlock LeaveCriticalSection
#else
#include <sys/time.h> // for gettimeofday
#include <pthread.h>
#define hmutex_t pthread_mutex_t
#define hmutex_init(mutex) pthread_mutex_init(mutex, NULL)
#define hmutex_destroy pthread_mutex_destroy
#define hmutex_lock pthread_mutex_lock
#define hmutex_unlock pthread_mutex_unlock
#endif
//#include "htime.h"
#define SECONDS_PER_HOUR 3600
#define SECONDS_PER_DAY 86400 // 24*3600
#define SECONDS_PER_WEEK 604800 // 7*24*3600;
static int s_gmtoff = 28800; // 8*3600
struct logger_s {
logger_handler handler;
unsigned int bufsize;
char* buf;
int level;
int enable_color;
// for file logger
char filepath[256];
unsigned long long max_filesize;
int remain_days;
int enable_fsync;
FILE* fp_;
char cur_logfile[256];
time_t last_logfile_ts;
int can_write_cnt;
hmutex_t mutex_; // thread-safe
};
static void logger_init(logger_t* logger) {
logger->handler = NULL;
logger->bufsize = DEFAULT_LOG_MAX_BUFSIZE;
logger->buf = (char*)malloc(logger->bufsize);
logger->level = DEFAULT_LOG_LEVEL;
logger->enable_color = 0;
logger->fp_ = NULL;
logger->max_filesize = DEFAULT_LOG_MAX_FILESIZE;
logger->remain_days = DEFAULT_LOG_REMAIN_DAYS;
logger->enable_fsync = 1;
logger_set_file(logger, DEFAULT_LOG_FILE);
logger->last_logfile_ts = 0;
logger->can_write_cnt = -1;
hmutex_init(&logger->mutex_);
}
logger_t* logger_create() {
// init gmtoff here
time_t ts = time(NULL);
struct tm* local_tm = localtime(&ts);
int local_hour = local_tm->tm_hour;
struct tm* gmt_tm = gmtime(&ts);
int gmt_hour = gmt_tm->tm_hour;
s_gmtoff = (local_hour - gmt_hour) * SECONDS_PER_HOUR;
logger_t* logger = (logger_t*)malloc(sizeof(logger_t));
logger_init(logger);
return logger;
}
void logger_destroy(logger_t* logger) {
if (logger) {
if (logger->buf) {
free(logger->buf);
logger->buf = NULL;
}
if (logger->fp_) {
fclose(logger->fp_);
logger->fp_ = NULL;
}
hmutex_destroy(&logger->mutex_);
free(logger);
}
}
void logger_set_handler(logger_t* logger, logger_handler fn) {
logger->handler = fn;
}
void logger_set_level(logger_t* logger, int level) {
logger->level = level;
}
void logger_set_level_by_str(logger_t* logger, const char* szLoglevel) {
int loglevel = DEFAULT_LOG_LEVEL;
if (strcmp(szLoglevel, "VERBOSE") == 0) {
loglevel = LOG_LEVEL_VERBOSE;
} else if (strcmp(szLoglevel, "DEBUG") == 0) {
loglevel = LOG_LEVEL_DEBUG;
} else if (strcmp(szLoglevel, "INFO") == 0) {
loglevel = LOG_LEVEL_INFO;
} else if (strcmp(szLoglevel, "WARN") == 0) {
loglevel = LOG_LEVEL_WARN;
} else if (strcmp(szLoglevel, "ERROR") == 0) {
loglevel = LOG_LEVEL_ERROR;
} else if (strcmp(szLoglevel, "FATAL") == 0) {
loglevel = LOG_LEVEL_FATAL;
} else if (strcmp(szLoglevel, "SILENT") == 0) {
loglevel = LOG_LEVEL_SILENT;
} else {
loglevel = DEFAULT_LOG_LEVEL;
}
logger->level = loglevel;
}
void logger_set_remain_days(logger_t* logger, int days) {
logger->remain_days = days;
}
void logger_set_max_bufsize(logger_t* logger, unsigned int bufsize) {
logger->bufsize = bufsize;
logger->buf = (char*)realloc(logger->buf, bufsize);
}
void logger_enable_color(logger_t* logger, int on) {
logger->enable_color = on;
}
void logger_set_file(logger_t* logger, const char* filepath) {
strncpy(logger->filepath, filepath, sizeof(logger->filepath));
// remove suffix .log
char* suffix = strrchr(logger->filepath, '.');
if (suffix && strcmp(suffix, ".log") == 0) {
*suffix = '\0';
}
}
void logger_set_max_filesize(logger_t* logger, unsigned long long filesize) {
logger->max_filesize = filesize;
}
void logger_set_max_filesize_by_str(logger_t* logger, const char* str) {
int num = atoi(str);
if (num <= 0) return;
// 16 16M 16MB
const char* e = str;
while (*e != '\0') ++e;
--e;
char unit;
if (*e >= '0' && *e <= '9') unit = 'M';
else if (*e == 'B') unit = *(e-1);
else unit = *e;
unsigned long long filesize = num;
switch (unit) {
case 'K': filesize <<= 10; break;
case 'M': filesize <<= 20; break;
case 'G': filesize <<= 30; break;
default: filesize <<= 20; break;
}
logger->max_filesize = filesize;
}
void logger_enable_fsync(logger_t* logger, int on) {
logger->enable_fsync = on;
}
void logger_fsync(logger_t* logger) {
hmutex_lock(&logger->mutex_);
if (logger->fp_) {
fflush(logger->fp_);
}
hmutex_unlock(&logger->mutex_);
}
const char* logger_get_cur_file(logger_t* logger) {
return logger->cur_logfile;
}
static void logfile_name(const char* filepath, time_t ts, char* buf, int len) {
struct tm* tm = localtime(&ts);
snprintf(buf, len, "%s.%04d%02d%02d.log",
filepath,
tm->tm_year+1900,
tm->tm_mon+1,
tm->tm_mday);
}
static FILE* logfile_shift(logger_t* logger) {
time_t ts_now = time(NULL);
int interval_days = logger->last_logfile_ts == 0 ? 0 : (ts_now+s_gmtoff) / SECONDS_PER_DAY - (logger->last_logfile_ts+s_gmtoff) / SECONDS_PER_DAY;
if (logger->fp_ == NULL || interval_days > 0) {
// close old logfile
if (logger->fp_) {
fclose(logger->fp_);
logger->fp_ = NULL;
}
else {
interval_days = 30;
}
if (logger->remain_days >= 0) {
char rm_logfile[256] = {0};
if (interval_days >= logger->remain_days) {
// remove [today-interval_days, today-remain_days] logfile
for (int i = interval_days; i >= logger->remain_days; --i) {
time_t ts_rm = ts_now - i * SECONDS_PER_DAY;
logfile_name(logger->filepath, ts_rm, rm_logfile, sizeof(rm_logfile));
remove(rm_logfile);
}
}
else {
// remove today-remain_days logfile
time_t ts_rm = ts_now - logger->remain_days * SECONDS_PER_DAY;
logfile_name(logger->filepath, ts_rm, rm_logfile, sizeof(rm_logfile));
remove(rm_logfile);
}
}
}
// open today logfile
if (logger->fp_ == NULL) {
logfile_name(logger->filepath, ts_now, logger->cur_logfile, sizeof(logger->cur_logfile));
logger->fp_ = fopen(logger->cur_logfile, "a");
logger->last_logfile_ts = ts_now;
}
// NOTE: estimate can_write_cnt to avoid frequent fseek/ftell
if (logger->fp_ && --logger->can_write_cnt < 0) {
fseek(logger->fp_, 0, SEEK_END);
long filesize = ftell(logger->fp_);
if (filesize > logger->max_filesize) {
fclose(logger->fp_);
logger->fp_ = NULL;
// ftruncate
logger->fp_ = fopen(logger->cur_logfile, "w");
// reopen with O_APPEND for multi-processes
if (logger->fp_) {
fclose(logger->fp_);
logger->fp_ = fopen(logger->cur_logfile, "a");
}
}
else {
logger->can_write_cnt = (logger->max_filesize - filesize) / logger->bufsize;
}
}
return logger->fp_;
}
static void logfile_write(logger_t* logger, const char* buf, int len) {
FILE* fp = logfile_shift(logger);
if (fp) {
fwrite(buf, 1, len, fp);
if (logger->enable_fsync) {
fflush(fp);
}
}
}
int logger_print(logger_t* logger, int level, const char* fmt, ...) {
if (level < logger->level)
return -10;
int year,month,day,hour,min,sec,ms;
#ifdef _WIN32
SYSTEMTIME tm;
GetLocalTime(&tm);
year = tm.wYear;
month = tm.wMonth;
day = tm.wDay;
hour = tm.wHour;
min = tm.wMinute;
sec = tm.wSecond;
ms = tm.wMilliseconds;
#else
struct timeval tv;
struct tm* tm = NULL;
gettimeofday(&tv, NULL);
time_t tt = tv.tv_sec;
tm = localtime(&tt);
year = tm->tm_year + 1900;
month = tm->tm_mon + 1;
day = tm->tm_mday;
hour = tm->tm_hour;
min = tm->tm_min;
sec = tm->tm_sec;
ms = tv.tv_usec/1000;
#endif
const char* pcolor = "";
const char* plevel = "";
#define XXX(id, str, clr) \
case id: plevel = str; pcolor = clr; break;
switch (level) {
LOG_LEVEL_MAP(XXX)
}
#undef XXX
// lock logger->buf
hmutex_lock(&logger->mutex_);
char* buf = logger->buf;
int bufsize = logger->bufsize;
int len = 0;
if (logger->enable_color) {
len = snprintf(buf, bufsize, "%s", pcolor);
}
len += snprintf(buf + len, bufsize - len, "%04d-%02d-%02d %02d:%02d:%02d.%03d %s ",
year, month, day, hour, min, sec, ms,
plevel);
va_list ap;
va_start(ap, fmt);
len += vsnprintf(buf + len, bufsize - len, fmt, ap);
va_end(ap);
if (logger->enable_color) {
len += snprintf(buf + len, bufsize - len, "%s", CLR_CLR);
}
if (logger->handler) {
logger->handler(level, buf, len);
}
else {
logfile_write(logger, buf, len);
}
hmutex_unlock(&logger->mutex_);
return len;
}
logger_t* hv_default_logger() {
static logger_t* s_logger = NULL;
if (s_logger == NULL) {
s_logger = logger_create();
}
return s_logger;
}
void stdout_logger(int loglevel, const char* buf, int len) {
fprintf(stdout, "%.*s", len, buf);
}
void stderr_logger(int loglevel, const char* buf, int len) {
fprintf(stderr, "%.*s", len, buf);
}
void file_logger(int loglevel, const char* buf, int len) {
logfile_write(hv_default_logger(), buf, len);
}