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#include <assert.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#define LOG_LINE_SIZE 1024
enum LogLevel {
INFO,
WARN,
};
char g_log_buff[LOG_LINE_SIZE];
void log_msg_to_buff(char *out, int size, enum LogLevel level, bool colored, const char *format, va_list args) {
assert(out);
assert(size);
assert(level == INFO || level == WARN);
assert(format);
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
long msec = ts.tv_nsec / 1000000;
struct tm tm = *localtime(&ts.tv_sec);
pid_t pid = getpid();
const char *level_str = NULL;
switch (level) {
case INFO:
level_str = "INFO";
break;
case WARN:
level_str = "WARN";
break;
default:
assert(false);
}
const char *color_code = NULL;
if (colored) {
switch (level) {
case INFO:
color_code = "\033[1;32m";
break;
case WARN:
color_code = "\033[1;33m";
break;
default:
assert(false);
}
}
// Imitate formatting style configured in 'salis.py'
int col = snprintf(
out,
size,
"%s%d-%02d-%02d %02d:%02d:%02d,%03ld %07d [%s]%s ",
colored ? color_code : "",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec,
msec,
pid,
level_str,
colored ? "\033[0m" : ""
);
vsnprintf(out + col, size - col, format, args);
}
void log_msg(enum LogLevel level, bool colored, const char *format, va_list args) {
assert(level == INFO || level == WARN);
assert(format);
log_msg_to_buff(g_log_buff, LOG_LINE_SIZE, level, colored, format, args);
printf("\r%s\n", g_log_buff);
}
void log_info(const char *format, ...) {
assert(format);
va_list args;
va_start(args, format);
log_msg(INFO, true, format, args);
va_end(args);
}
void log_warn(const char *format, ...) {
assert(format);
va_list args;
va_start(args, format);
log_msg(WARN, true, format, args);
va_end(args);
}
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