The point is that J does not _allow_ the user to make a specific step to load
the library and ....
I agree that J works 99%, my point of discussion is what that cannot be done
rather than what that can be done in current J.
FYI, Linux api similar to that in win32's GetProcAddress cannot be called using
15!:0 directly.
Oleg Kobchenko wrote:
There point is that J does not require the user to make
a specific step to load the library and then
to pass the ID around. Instead the name (path to)
library is included in every function definition.
Whereas R closely models system api requiring
GetProcAddress to be done separately.
Other than that any DLL that R call call, J can call too.
--- bill lam <[EMAIL PROTECTED]> wrote:
I meant to say J cannot load a dll or so and return the pointer of the loaded
library similar to the example provided by Kamakura
dyn.load("directory/foo.so")
This is different from calling a function inside that library.
Raul Miller wrote:
On 4/7/07, bill lam <[EMAIL PROTECTED]> wrote:
kamakura wrote:
Does J support dynamic loading C or Fortran object file? If so, I
would
like to know the syntax for invoking C or Fortran subprograms. I
want a
simple J function with arguments of 'function name' and function
arguments.
I think that J does not support dynamic loading dll or so directly and
I wish
that this can be supported in the next beta.
I believe you intended to say that J does not directly support dynamic
loading of object file formats other than shared library formats.
Of course, as you indicated, the 15!: series
(http://www.jsoftware.com/help/dictionary/dx015.htm) do support dynamic
loading of PEX .DLLs (windows) or ELF .SOs (linux and perhaps mac).
If you have code from some other language which dynamically loads other
file formats (such as COFF .Os), you could have that code made available
to J in an appropriate PEX or ELF file and then your code could dynamically
load whatever other formats for J (presumably implementinging a system
modeled after 15!:).
If you have a good candidate for inclusion in some future version of J
(plausibly simple, and at least hinting at a model for clean interfaces),
send it to Roger Hui -- I'm sure he'd be happy with your participation.
--
regards,
bill
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--
regards,
bill
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