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yobot_log.c
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yobot_log.c
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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "yobot_log.h"
#if defined(unix) || defined(__unix) || defined(__unix__)
#include <curses.h>
#include <term.h>
#include <unistd.h>
#define HAVE_CURSES 1
#endif
/*just some macros*/
#define _FG "3"
#define _BG "4"
#define _BRIGHT_FG "1"
#define _INTENSE_FG "9"
#define _DIM_FG "2"
#define _YELLOW "3"
#define _WHITE "7"
#define _MAGENTA "5"
#define _CYAN "6"
#define _BLUE "4"
#define _GREEN "2"
#define _RED "1"
#define _BLACK "0"
/*Logging subsystem*/
#define __loggerlogwrap(level, fmt, ...) yobot_logger(loggerparams_internal, level, \
__LINE__, __func__, fmt, ## __VA_ARGS__)
static yobot_log_s loggerparams_internal = {
"logger",
1
};
static char *title_fmt = "", *reset_fmt = "";
#ifdef HAVE_CURSES
static int use_escapes = -1;
static void _init_color_logging(void) {
if (use_escapes < 0) {
if (!isatty(STDOUT_FILENO)) {
use_escapes = 0;
__loggerlogwrap(YOBOT_LOG_WARN, "no tty detected");
return;
}
int erret;
if (setupterm(NULL, STDOUT_FILENO, &erret) != OK) {
use_escapes = 0;
__loggerlogwrap(YOBOT_LOG_ERROR, "setupterm returned ERR");
return;
}
erret = tigetnum("colors");
if (erret <= 0) {
use_escapes = 0;
__loggerlogwrap(YOBOT_LOG_WARN, "couldn't find color caps for terminal");
return;
} else {
if (erret >= 16) {
title_fmt = "\033[" _INTENSE_FG _MAGENTA "m";
use_escapes = 1;
} else if (erret >= 8) {
title_fmt = "\033[" _BRIGHT_FG ";" _FG _MAGENTA "m";
use_escapes = 1;
} else /*less than eight colors*/ {
use_escapes = 0;
__loggerlogwrap(YOBOT_LOG_WARN, "too few colors supported by terminal. not doing logging");
}
}
if(use_escapes) {
reset_fmt = "\033[0m";
__loggerlogwrap(YOBOT_LOG_INFO, "using color escapes for logging");
}
}
}
#else
#define _init_color_logging() ;
static int use_escapes = 0;
#endif
void yobot_logger(yobot_log_s logparams, yobot_log_level level, int line,
const char *fn, const char *fmt, ...) {
if (logparams.level > level) {
printf("level failed");
return;
}
if(use_escapes < 0) {
_init_color_logging();
}
va_list ap;
va_start(ap, fmt);
char *line_fmt = "";
if (use_escapes) {
switch (level) {
case YOBOT_LOG_CRIT:
case YOBOT_LOG_ERROR: {
line_fmt = "\033[" _BRIGHT_FG ";" _FG _RED "m";
break;
}
case YOBOT_LOG_WARN: {
line_fmt = "\033[" _FG _YELLOW "m";
break;
}
case YOBOT_LOG_DEBUG: {
line_fmt = "\033[" _DIM_FG ";" _FG _WHITE "m";
break;
}
default:
line_fmt = "";
break;
}
}
printf("[%s%s%s] ", title_fmt, logparams.prefix, reset_fmt);
printf("%s", line_fmt);
printf("%s:%d ", fn, line);
vprintf(fmt, ap);
printf("%s", reset_fmt);
printf("\n");
fflush(NULL);
va_end(ap);
}