Function add_data_in_datablock

extlibs/minizip/src/zip.c:224–273

local int add_data_in_datablock(linkedlist_data* ll, const void* buf, uLong len)
{
    linkedlist_datablock_internal* ldi;
    const unsigned char* from_copy;

    if (ll == NULL)
        return ZIP_INTERNALERROR;

    if (ll->last_block == NULL)
    {
        ll->first_block = ll->last_block = allocate_new_datablock();
        if (ll->first_block == NULL)
            return ZIP_INTERNALERROR;
    }

    ldi = ll->last_block;
    from_copy = (unsigned char*)buf;

    while (len > 0)
    {
        uInt copy_this;
        uInt i;
        unsigned char* to_copy;

        if (ldi->avail_in_this_block == 0)
        {
            ldi->next_datablock = allocate_new_datablock();
            if (ldi->next_datablock == NULL)
                return ZIP_INTERNALERROR;
            ldi = ldi->next_datablock;
            ll->last_block = ldi;
        }

        if (ldi->avail_in_this_block < len)
            copy_this = (uInt)ldi->avail_in_this_block;
        else
            copy_this = (uInt)len;

        to_copy = &(ldi->data[ldi->filled_in_this_block]);

        for (i = 0; i < copy_this; i++)
            *(to_copy + i) = *(from_copy + i);

        ldi->filled_in_this_block += copy_this;
        ldi->avail_in_this_block -= copy_this;
        from_copy += copy_this;
        len -= copy_this;
    }
    return ZIP_OK;
}


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