smol-gilbraltar/kernel/log.c

#include <log.h>
#include <serial.h>
#include <stdio.h>

static enum log_level actual_level = INFO;

size_t gilbraltar_log(enum log_level level, const char *fmt, ...) {
  if (actual_level < level)
    return 0;

  va_list args;
  size_t size;
  char buffer[320];

  va_start(args, fmt);
  size = vsnprintf(buffer, sizeof buffer, fmt, args);
  va_end(args);

  if (size >= sizeof buffer) {
    const char trunc[] = "(truncated)\n";
    gilbraltar_serial_write(buffer, sizeof buffer - 1);
    gilbraltar_serial_write(trunc, sizeof buffer - 1);
    return (sizeof buffer - 1);
  } else {
    gilbraltar_serial_write(buffer, size);
    return size;
  }
}

void gilbraltar_log_set(enum log_level level) { actual_level = level; }