Function _bindkey

crawl-ref/source/initfile.cc:3586–3665

Not a method of the game_options class since keybindings aren't stored in that class.

// Not a method of the game_options class since keybindings aren't
// stored in that class.
static void _bindkey(string field)
{
    const size_t start_bracket = field.find_first_of('[');
    const size_t end_bracket   = field.find_last_of(']');

    if (start_bracket == string::npos
        || end_bracket == string::npos
        || start_bracket > end_bracket)
    {
        mprf(MSGCH_ERROR, "Bad bindkey bracketing in '%s'",
             field.c_str());
        return;
    }

    const string key_str = field.substr(start_bracket + 1,
                                        end_bracket - start_bracket - 1);
    const char *s = key_str.c_str();

    char32_t wc;
    vector<char32_t> wchars;
    while (int l = utf8towc(&wc, s))
    {
        s += l;
        wchars.push_back(wc);
    }


    int key;

    if (wchars.size() == 0)
    {
        mprf(MSGCH_ERROR, "No key in bindkey directive '%s'",
             field.c_str());
        return;
    }
    else if (wchars.size() == 1)
        key = wchars[0];
    else if (wchars[0] == '\\')
    {
        // does this need to validate non-widechars?
        keyseq ks = parse_keyseq(key_str);
        if (ks.size() != 1)
        {
            mprf(MSGCH_ERROR, "Invalid keyseq '%s' in bindkey directive '%s'",
                key_str.c_str(), field.c_str());
        }
        key = ks[0];
    }
    else // if (wchars.size() > 1)
    {
        // XX probably would be safe to directly check for numbers?
        // don't use the wide char version for this part
        // Try to read a human-readable keycode. `^` sequences handled here.
        key = read_key_code(key_str);
        if (key == CK_NO_KEY)
        {
            mprf(MSGCH_ERROR, "Invalid key '%s' in bindkey directive '%s'",
                 key_str.c_str(), field.c_str());