Hi Markus,
> On Aug 26, 2017, at 2:51 AM, Krug, Markus <[email protected]> wrote:
>
> Dear all,
>
> Because I adapt the HDF file standard to an embedded system I cannot use the
> HDF lib sources and have to build a very simplified version on base of the
> HDF 3.0 file spec.
Ah, good - it’s always useful to have people verify how clear and
correct the file format spec is. :-)
> I find out that HDFview and also Matlab is using the local heap for storing
> the name of elements in that belong to a group. When I look into the HDF3.0
> file spec I couldn’t find a description of objects that are placed in the
> local heap. The description ends with the description of the local heap
> header (https://support.hdfgroup.org/HDF5/doc/H5.format.html#LocalHeap).
>
> The local heap objects seems to be something like
> - 8 Byte of 0x00 (probably something like reserved or a flag field that
> equals to 0x00)
> - Name of the elements in ASCII codes and 0x00 terminated and also aligned to
> 8byte borders
> - 2 times unknown information to me each of them aligned to the next 8byte
> border - especially this is something I need to know
>
> I also looked into the heap object description of the global heap. However,
> the file specification says:
> The object data is treated as a one-dimensional array of bytes to be
> interpreted by the caller.
> So I considered this as ‘not defined by the HDF standard’
>
> So finally my question is where can I find the layout and description of a
> local heap object
I believe you want this section of the file format:
https://support.hdfgroup.org/HDF5/doc/H5.format.html#SymbolTableEntry
<https://support.hdfgroup.org/HDF5/doc/H5.format.html#SymbolTableEntry>
Let me know if that isn’t clear enough for you to work from,
Quincey
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