#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include "tools.h"

char powerToChar(int power)
{
  switch(power)
  {
    case 0:
      return 'b';
    case 1:
      return 'k';
    case 2:
      return 'M';
    case 3:
      return 'G';
    case 4:
      return 'T';
    case 5:
      return 'P';
    case 6:
      return 'E';
  }

  return '?';
}


void statusError(char *where, char *what, char *extra)
{
  fprintf(stderr, "%s: %s", where, what);
  if (extra) {
    fprintf(stderr, " -- %s", extra);
  }
  fputs("\n", stderr);
}


ssize_t fileRead(char *buf, size_t bufsize, char *file)
{
  int fd;
  int readbytes;

  fd = open(file, 0);
  if (fd < 0) {
    return -1;
  }

  readbytes = read(fd, buf, bufsize - 1);
  close(fd);

  if (readbytes > 0) {
    buf[readbytes] = '\0';
  } else {
    buf[0] = '\0';
  }

  return readbytes;
}