Function permutateObjectFilename

src/OpenLoco/src/Objects/ObjectManager.cpp:678–705

    }

    static void permutateObjectFilename(std::string& filename)
    {
        auto* firstChar = filename.c_str();
        auto* endChar = &filename[filename.size()];
        auto* c = endChar;
        do
        {
            c--;
            if (c == firstChar)
            {
                filename = "00000000";
                break;
            }
            if (*c < '0')
            {
                *c = '/';
            }
            if (*c == '9')
            {
                *c = '@';
            }
            if (*c == 'Z')
            {
                *c = '/';
            }
            *c = *c + 1;
        } while (*c == '0');
    }

    // All object files are based on their internal object header name but
    // there is a chance of a name collision this function works out if the name