IsValidRoleplayName

stock IsValidRoleplayName(const vname[]) {
    if (!vname[0] || strfind(vname, "_") == -1)
        return 0;

    else for (new a = 0, len = strlen(vname); a != len; a ++) {
        if ((a == 0) && (vname[a] < 'A' || vname[a] > 'Z'))
            return 0;

        else if ((a != 0 && a < len  && vname[a] == '_') && (vname[a + 1] < 'A' || vname[a + 1] > 'Z'))
            return 0;

        else if ((vname[a] < 'A' || vname[a] > 'Z') && (vname[a] < 'a' || vname[a] > 'z') && vname[a] != '_' && vname[a] != '.')
            return 0;
    }
    return 1;
}