Call C/C++ Code from MATLAB Code

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Tareg Mohammed
Tareg Mohammed 2021-11-9
评论： Tareg Mohammed 2021-11-13
I am trying to implement the following example:
Integrate External Code that Uses Custom Data Types
This example shows how to call a C function that uses data types that are not natively defined within MATLAB®.
consider the MATLAB function addCTypes.m:
function [out] = addCTypes(a,b)
%#codegen
% generate include statements for header files
coder.cinclude('MyStruct.h');
coder.cinclude('createStruct.h');
coder.cinclude('useStruct.h');
% initialize variables before use
in = coder.opaque('MyStruct');
out = 0;
% call C functions
in = coder.ceval('createStruct',a,b);
out = coder.ceval('useStruct',in);
end
The createStruct function outputs a C structure type:
#include <stdio.h>
#include <stdlib.h>
#include "MyStruct.h"
#include "createStruct.h"
struct MyStruct createStruct(double a, double b) {
struct MyStruct out;
out.p1 = a;
out.p2 = b;
return out;
}
The useStruct function performs an operation on the C type:
#include "MyStruct.h"
#include "useStruct.h"
double useStruct(struct MyStruct in) {
return in.p1 + in.p2;
}
To generate code, specify the source (.c) files as inputs:
codegen addCTypes -args {1,2} -report createStruct.c useStruct.c
and I get the follwong result:
------------------------------------------------------------------------
??? Build error: C compiler produced errors. See the Build Log for further details.
More information
Code generation failed: View Error Report
Error using codegen
Error in run (line 1)
codegen addCTypes -args {1,2} -report createStruct.c useStruct.c
should I make a file 'MyStruct.h', and how I should define it ?

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回答（1 个）

James Tursa
James Tursa 2021-11-12
编辑：James Tursa 2021-11-12
If your code includes a file called MyStruct.h, then yes you should have such a file. I would expect it to be something like this:
/* File: MyStruct.h */
struct MyStruct {
double p1;
double p2;
};
You need the other header files also. These files need to be in a directory that is visible to the compiler when it sees the #include lines.
  1 个评论
Tareg Mohammed
Tareg Mohammed 2021-11-13
I included all relavent files in same directory, with MyStruct.h. and it still shows the following error.

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