Hi,
I can't seem to get a hang of how to call a C function that essentially
needs a string containing the path to a file as input, but it is declared
as a structure containing a const char. The setup is the following (SPICE
library):
I want to call the function:
void furnsh_c ( ConstSpiceChar * file ) { ... }
with the structure ConstSpiceChar being defined as:
typedef const char ConstSpiceChar;
I don't know how to call that from Julia. What I have tried and modified in
many ways is the following:
immutable ConstSpiceChar
x::Ptr{UInt8}
end
kernel = ConstSpiceChar(pointer("../../../../cspice/kernels/sat317.bsp"))
ccall((:furnsh_c , spicelib), Void, (Ptr{ConstSpiceChar},) , pointer(kernel
))
Which ends up in an error:
LoadError: TypeError: anonymous: in ccall: first argument not a pointer or
valid constant expression, expected Ptr{T}, got Tuple{Symbol,ASCIIString}
I hope there is an easy solution to this. I am not very skilled in C.
Thanks, Felix.
