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SeungheonOh/logger.h

Last active June 27, 2020 04:09
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  1. SeungheonOh revised this gist Jun 27, 2020. 1 changed file with 0 additions and 1 deletion.
    1 change: 0 additions & 1 deletion logger.h
    View file
    Original file line number Diff line number Diff line change
    @@ -25,7 +25,6 @@ enum LogLevel {
    #define LOG_BUFFER_MAX 16000

    // Print all logs higher than log level
    //static unsigned long _LogLevel = DISCORD_LOG_ERROR | DISCORD_LOG_WARNING | DISCORD_LOG_NOTICE;
    static unsigned long _loglevel = LOG_ALL;

    void set_loglevel(enum LogLevel ll) { _loglevel= ll; }
  2. SeungheonOh created this gist Jun 22, 2020.
    87 changes: 87 additions & 0 deletions logger.h
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,87 @@
    #include <stdio.h>
    #include <stdlib.h>
    #include <stdarg.h>
    #include <time.h>

    #define __LOG(ll) \
    va_list args;\
    va_start(args, format);\
    _print_log(ll, format, args);\
    va_end(args);

    // Log levels
    enum LogLevel {
    LOG_ERROR = 1 << 0,
    LOG_WARNING = 1 << 1,
    LOG_NOTICE = 1 << 2,
    LOG_INFO = 1 << 3,
    LOG_DEBUG = 1 << 4,
    LOG_ALL = ~0,
    };

    // sequences can be found here: http://man7.org/linux/man-pages/man3/strftime.3.html
    #define LOG_TIMESTAMP_FORMAT "%X"
    #define LOG_TIMESTAMP_BUFFER_MAX 50
    #define LOG_BUFFER_MAX 16000

    // Print all logs higher than log level
    //static unsigned long _LogLevel = DISCORD_LOG_ERROR | DISCORD_LOG_WARNING | DISCORD_LOG_NOTICE;
    static unsigned long _loglevel = LOG_ALL;

    void set_loglevel(enum LogLevel ll) { _loglevel= ll; }

    // Simple enum to string
    char *_log_level_name(enum LogLevel ll) {
    switch(ll) {
    case LOG_ERROR: return "ERROR"; break;
    case LOG_WARNING: return "WARNING"; break;
    case LOG_NOTICE: return "NOTICE"; break;
    case LOG_INFO: return "INFO"; break;
    case LOG_DEBUG: return "DEBUG"; break;
    default: return "UNKOWNN"; break;
    }
    }

    /*
    * Number of things:
    * 1: Check if it should print the following log or not according to the global log level
    * 2: Generate timestamp with LOG_TIMESTAMP_FORMAT
    * 3: Compile raw message from format and args
    * $: Print log
    */
    void _print_log(enum LogLevel ll, const char *format, va_list args) {
    // No log that is not on LogLevel
    if(!(ll & _loglevel)) return;

    // Create time stamp
    char timestamp[LOG_TIMESTAMP_BUFFER_MAX];
    time_t rawtime;
    struct tm *timeinfo;
    time(&rawtime);
    timeinfo = localtime(&rawtime);
    strftime(timestamp, LOG_TIMESTAMP_BUFFER_MAX, LOG_TIMESTAMP_FORMAT, timeinfo);

    // Create Message
    char message[LOG_BUFFER_MAX];
    vsprintf(message, format, args);

    // Compile and print
    fprintf(stderr, "[%s][%s] %s\n", timestamp, _log_level_name(ll), message);
    }

    // Functions for faster access to logger
    void logger(enum LogLevel ll, const char *format, ...) { __LOG(ll); }
    void log_error(const char *format, ...) { __LOG(LOG_ERROR); }
    void log_warn(const char *format, ...) { __LOG(LOG_WARNING); }
    void log_notice(const char *format, ...) { __LOG(LOG_NOTICE); }
    void log_info(const char *format, ...) { __LOG(LOG_INFO); }
    void log_debug(const char *format, ...) { __LOG(LOG_DEBUG); }

    // Simple die function
    void die(int code, const char *format, ...) {
    va_list args;
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
    exit(code);
    }