gildor changed the topic of #ocaml to: Discussions about the OCaml programming language | http://caml.inria.fr/ | OCaml 3.11.2 released
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<adrien>
would anyone have conversion macros/functions for the C interface? like 'a array conversion to/from C?
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<thelema>
adrien: ocaml arrays don't have to be converted to c arrays - an ocaml [value] representing an array is either a pointer to a C array of doubles or [value]s. The tag info is stored at array index -1.
<adrien>
thelema: yeah, but sometimes I need to null-terminate the arrays and maybe prepend them with their length (not in the same way as ocaml of course), and I'll still need to turn C arrays into ocaml ones
<thelema>
that's dangerous to do, as the memory location just past the end of the array is possibly used. You're copying the array, no?
<adrien>
yeah, will do
<mrvn>
Use an Bigarray
<mrvn>
or string if you can live with the GC moving the string.
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<adrien>
hmmm, I had forgotten about bigarrays, I need to look more at the C APIs
<eelte>
we use this kind of conversion for prologin contest
<eelte>
but we have segfault sometimes :( I don't understant why
<mrvn>
eelte: Did you declare the value to the GC? Usualy segfaults with C functions are because the GC compacts the heap and moves something and you forgot to declare some value.
<eelte>
I don't know, I'm not the author of the Cpp/caml interface
<eelte>
I made the Cpp/ruby interface, the Cpp/pascal interface, the Cpp/C interface, a part of the Cpp/java interface, and the Cpp/prolog interface, but the Cpp/prolog interface does not work :(
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<flux>
adrien, ocamlidl does something like that?
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<gildor>
sgnb: ping ?
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<gildor>
sgnb: have you have time to look for a SSL cert ?
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