int _expand_format_str(char *restrict buffer, const char *restrict format)
{
    const char *fpos;
    char *bpos;
    int is_bold = 0;
    int len = strlen(format)+20;

    if (!buffer)
        return len;

    for (fpos = format, bpos = buffer; *fpos != '\0'; ++fpos)
    {
        switch (*fpos)
        {
            case '*':
                if (!is_bold)
                {
                    *bpos++ = 0x1b;
                    *bpos++ = 0x5b;
                    *bpos++ = 0x31;
                    *bpos++ = 0x6d;
                } else
                {
                    *bpos++ = 0x1b;
                    *bpos++ = 0x28;
                    *bpos++ = 0x42;
                    *bpos++ = 0x1b;
                    *bpos++ = 0x5b;
                    *bpos++ = 0x6d;
                }
                is_bold = !is_bold;
                break;

            default:
                *bpos = *fpos;
                bpos++;
                break;
        }
    }

    return len;
}