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External development: Populating a complex array in C [message #91532]

Sat, 25 July 2015 11:08

dg86
Messages: 118
Registered: September 2012

Senior Member

Dear Folks,

I'm trying to write a DLL in C that returns a complex array to IDL.
I can create the (temporary) array with no trouble:

char * pd;
IDL_VPTR idl_array;
IDL_MEMINT dim[IDL_MAX_ARRAY_DIM];

dim[0] = 512;
dim[1] = 512;
pd = IDL_MakeTempArray(IDL_TYP_COMPLEX, 2, dim, IDL_ARR_INI_ZERO, &idl_array);

Next, I'd like to populate the idl_array with values, ideally using memcpy for
speed and clarity. Attempts resembling

memcpy(pd, src, 512*512*sizeof(float));

seem not to change the data in idl_array. Does anyone know the right way
to copy floating point data from the C src array to the idl_array?

Alternatively, does anyone know how to convert two IDL_TYPE_FLOAT arrays
into one IDL_TYPE_COMPLEX array along the lines of the COMPLEX(real,imag)
function in IDL?

Many thanks,

David

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[Message index]

		External development: Populating a complex array in C By: dg86 on Sat, 25 July 2015 11:08
		Re: External development: Populating a complex array in C By: Heinz Stege on Sat, 25 July 2015 14:18
		Re: External development: Populating a complex array in C By: Heinz Stege on Sun, 26 July 2015 03:51
		Re: External development: Populating a complex array in C By: dg86 on Sun, 26 July 2015 04:54

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