validate.c

static int performance_file_is_complete_if(char *filename_cp)
{
    int bytes = 0;
    int nl = 0;
    int first_character = TRUE;
    char c;
    char line[READ_BUFFER_SIZE];
    FILE *fh_tp;

    fh_tp = fopen(filename_cp, "r");
    if(!fh_tp)
    {
      printf("INVALID FILE\n");
      return 0;
    }

    /* Rewind from end of file until we see 2 x '\n'. */
    fseek(fh_tp, -1, SEEK_END);
    while(fseek(fh_tp, -2, SEEK_CUR) == 0) {
      first_character = FALSE;
      bytes++;
      c = fgetc(fh_tp);
      if ((c == '\n' && ++nl > 0) || READ_BUFFER_SIZE - bytes == 0) {
        break;
      }
    }

    /* If last character read not '\n' then we need one more for this to be a valid line. */
    if (c != '\n') {
      fseek(fh_tp, -1, SEEK_CUR);
    }

    fgets(line, sizeof line, fh_tp);
    printf("LINE: %s\n", line);
    fclose(fh_tp);

    return(
           line[0] == '"'
        && line[1] == 'Z'
        && line[2] == 'Z'
        && line[3] == '"'
    );
}