Method putFile

lib/vfs/cpmfs.cc:398–477

public:
    void putFile(const Path& path, const Bytes& bytes) override
    {
        mount();
        if (path.size() != 1)
            throw BadPathException();

        /* Test to see if the file already exists. */

        for (int d = 0; d < _config.dir_entries(); d++)
        {
            std::unique_ptr<Entry> entry = getEntry(d);
            if (entry->deleted)
                continue;
            if (path[0] == entry->combinedFilename())
                throw CannotWriteException();
        }

        /* Write blocks, one at a time. */

        std::unique_ptr<Entry> entry;
        ByteReader br(bytes);
        while (!br.eof())
        {
            unsigned extent = br.pos / 0x4000;
            Bytes block = br.read(_config.block_size());

            /* Allocate a block and write it. */

            auto bit = std::find(_bitmap.begin(), _bitmap.end(), false);
            if (bit == _bitmap.end())
                throw DiskFullException();
            *bit = true;
            unsigned blocknum = bit - _bitmap.begin();
            putCpmBlock(blocknum, block);

            /* Do we need a new directory entry? */

            if (!entry ||
                entry->allocation_map[std::size(entry->allocation_map) - 1])
            {
                if (entry)
                {
                    entry->records = 0x80;
                    putEntry(entry);
                }

                entry.reset();
                for (int d = 0; d < _config.dir_entries(); d++)
                {
                    entry = getEntry(d);
                    if (entry->deleted)
                        break;
                    entry.reset();
                }

                if (!entry)
                    throw DiskFullException();
                entry->deleted = false;