Good point. I'll do that.
Another question,
In C I do this:
typedef struct pst_file {
pst_desc_tree *d_head
} pst_file;
pst_desc_tree *d_ptr; //this is another struct
d_ptr = pstfile.d_head;
How do I make this assignment with ref-struct?
On Thursday, August 23, 2012 12:34:26 PM UTC-4, Nathan Rajlich wrote:
>
> So basically when you're calling "ref.refType(pst_block_recorder)",
> pst_block_recorder is still undefined. I ran into this problem with a
> struct that libffi uses, and the solution is to progressively create
> the struct instance using the "defineProperty()" function. Try
> something like this:
>
> var pst_block_recorder = Struct();
> pst_block_recorder.defineProperty('next',
> ref.refType(pst_block_recorder));
> pst_block_recorder.defineProperty('offset', 'int64');
> pst_block_recorder.defineProperty('size', 'size_t');
> pst_block_recorder.defineProperty('readcount', 'int');
>
> On Thu, Aug 23, 2012 at 7:53 AM, rhasson <[email protected] <javascript:>>
> wrote:
> > Nathan,
> >
> > I started using node-ffi which works great. I need to create some
> structs
> > so I'm using ref-struct. Now some of my structs have pointers to
> themselves
> > like this:
> >
> > typedef struct pst_block_recorder {
> > struct pst_block_recorder *next;
> > int64_t offset;
> > size_t size;
> > int readcount;
> > } pst_block_recorder;
> >
> > I tried to recreate this with ref-struct like this:
> > var pst_block_recorder = Struct ({
> > //struct pst_block_recorder *next;
> > 'next': ref.refType(pst_block_recorder),
> > //int64_t offset;
> > 'offset': 'int64',
> > //size_t size;
> > 'size': 'size_t',
> > //int readcount;
> > 'readcount': 'int'
> > });
> >
> > But I get the following error:
> > assert.js:102
> > throw new assert.AssertionError({
> > ^
> > AssertionError: could not determine a proper "type" from: undefined
> > at Object.coerceType (/home/roy/node_modules/ref/lib/ref.js:389:3)
> > at Object.refType (/home/roy/node_modules/ref/lib/ref.js:304:23)
> >
> >
> > I also tried making those struct fields "pointer" types but the C
> library
> > doesn't seem to populate them correctly.
> >
> > Any thoughts?
> >
> > Thanks,
> > Roy
> >
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