log test

test_log.cpp

#include <bits/stdc++.h>

#define LOG_LEVEL_VERBOSE   0
#define LOG_LEVEL_DEBUG     1
#define LOG_LEVEL_INFO      2
#define LOG_LEVEL_WARNING   3
#define LOG_LEVEL_ERROR     4

#define DEBUG_LEVEL LOG_LEVEL_INFO
#define LOG_TAG "TEST_LOG"

#define TRIM_STR(n, str) str[n]

#define TS_PRINTF(fmt, x...)                                                            \
{                                                                                       \
    auto tt = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());   \
    struct tm* ptm = localtime(&tt);                                                    \
    fprintf(stdout, "%d-%02d-%02d | %02d:%02d:%02d  |  " fmt "\n",                      \
        (int)ptm->tm_year + 1900,(int)ptm->tm_mon + 1,(int)ptm->tm_mday,                \
        (int)ptm->tm_hour,(int)ptm->tm_min,(int)ptm->tm_sec,                            \
        ##x);                                                                           \
}

#define LOG(level, fmt, x...)                                                                            \
{                                                                                                        \
    if (level >= DEBUG_LEVEL)                                                                            \
        TS_PRINTF("%c: %s : %s: %d  |  " fmt, TRIM_STR(10, #level), LOG_TAG, __func__, __LINE__, ##x);   \
}

#define LOGV(fmt, x...) LOG(LOG_LEVEL_VERBOSE, fmt, ##x)
#define LOGD(fmt, x...) LOG(LOG_LEVEL_DEBUG, fmt, ##x)
#define LOGI(fmt, x...) LOG(LOG_LEVEL_INFO, fmt, ##x)
#define LOGW(fmt, x...) LOG(LOG_LEVEL_WARNING, fmt, ##x)
#define LOGE(fmt, x...) LOG(LOG_LEVEL_ERROR, fmt, ##x)

int main() {
    LOGV("This is a test log, %s", "verbose");  // < default, won't print
    LOGD("This is a test log, %s", "debug");    // < default, won't print
    LOGI("This is a test log, %s", "info");     // = default, print
    LOGW("This is a test log, %s", "warning");  // > default, print
    LOGE("This is a test log, %s", "error");    // > default, print

    return 0;
}