I have some ANSI standard C code which is authoritative. What that means is that although I have the source, I can not translate to another language nor modify calling arguments, as those actions would invalidate the authority. There are over 150 functions.<\/p>\n
I can make incidental changes, such as change the file names from .C to .CPP so that it compiles using Visual Studio 2009’s C++ compiler, which I have done. Compiler directives and such can also be added. I can also go through a wrapper layer, if necessary.<\/p>\n
Another restriction is my company does not<\/b> want me to use the unsafe<\/b> key word in any C# code.<\/p>\n
I need to get at these functions from a C# program.<\/b><\/p>\n
A typical C\/C++ function looks like this: I first tried making an unmanaged DLL (with the functions marked Extern C). Functions with only simple arguments (int, double) worked fine, but I could not determine how to Marshal the arrays. (Actually, I did find some sample code, but it was extremely complex and unreasonable to duplicate 150 times.)<\/p>\n I then tried two projects within the same solution, one in C++ and the other in C#. In the C++ project, I created a managed function which just called the original function which was marked as unmanaged. This was extremely clean and simple, and again, simple arguments worked fine. But for arrays, I couldn’t find how to make the argument types match across the C# to C++ boundary: Certainly what I am trying to do must be possible. What is the best way to get at these functions?<\/p>\n (Sample code using the above function would be really cool.)<\/p>\n","protected":false},"excerpt":{"rendered":" I have some ANSI standard C code which is authoritative. What that means is that although I have the source, I can not translate to another language nor modify calling arguments, as those actions would invalidate the authority. There are over 150 functions. I can make incidental changes, such as change the file names from […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3741","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3741"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3741\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\ndouble SomeFunction(double a, double[3] vec, double[3][3] mat);<\/code>
\nWhere the array contents are sometimes input, sometimes output, and rarely both.<\/p>\n
\nArgument '2': cannot convert from 'double[]' to 'double*'<\/i><\/code>
\n(and as mentioned above, I can’t use unsafe to get a pointer).<\/p>\n