Thanks! I did something very similar and am about to check it out.
Oh, packing handlers. I better check them out. Dar > On Apr 18, 2016, at 1:57 AM, Peter TB Brett <[email protected]> wrote: > > > > On 17/04/2016 16:14, Dar Scott wrote: >> I'm using LiveCode 8.0.0 RC 1 on the Mac. I'm tinkering with LiveCode >> Builder to make library extensions. >> >> I want to pass a buffer pointer to a foreign handler, in a hardware vendor >> supplied dynamic library Then I want to access the bytes/words in that >> buffer. >> >> What's the best way to do this? >> >> I thought about building up a value of type data of the right length. Is >> the data value contiguous? Does it stay in one place? Is the value allowed >> to change? I think breaking equality is OK. How do I get the pointer to >> the underlying first byte? (MCDataGetBytePtr()?) Or is a data ref >> automatically converted to pointer as needed? >> >> Or do I need to allocate my own memory? Are any <builtin> functions are >> available to do this? How do I get to the bytes after I make the call to >> the foreign function? (MCMemoryAllocate()?) > > If you want a particularly horrible example, check out my wrapper for the > poll(2) system call: > > https://github.com/peter-b/undergrowth/blob/master/_poll.lcb > > I won't claim it's the "best way to do this" but it appears to mostly work! > >> Is this noise on this list? Should this question be elsewhere? > > No, it's completely on-topic. > > Peter > > -- > Dr Peter Brett <[email protected]> > LiveCode Open Source Team > > LiveCode 2016 Conference: https://livecode.com/edinburgh-2016/ > > _______________________________________________ > use-livecode mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
