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Liam Healy authored
Made the generic function #'contents-from-pointer that takes a pointer to a GSL struct and produces a list of the contents suitable for the :initial-contents argument to #'make-marray. Added an argument :from-pointer to #'make-marray that then creates a new marray with the same contents. Some functions in solve-minimize-fit return a pointer to a GSL vector with double-floats. Copying in this way is necessary because GSL has malloced the data in a non-CL place. Sometimes, this results in the copying of data whose only further use will be to extract a pointer to pass to another GSL function. Added a method to #'mpointer that permits directly passing a pointer, but this isn't useful for arrays because there are many element types so the functions have been defined as methods.
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