MATLAB COMPILER 4 Manuale Utente Scaricare il pdf (Pagina 15)

fun cti on [C , D ] = simple (A , B , T e stStr )

f p r i n t f ([ TestStr , ’\ n\ n ’]);

C = A + B ;

D = A * B ;

return ;

Listing 3: simple.m

This is a Test String .

Output by C API In t erface Function

Output by C Native Function

2.000000 3.000000

5.000000 6.000000

Listing 4: Output of the Test Program

5.2.1 Additional Explanation for the Example Source Code

line 1: The include ﬁle matlab.h provides the interfaces for the MATLAB C Interface API.

line 2: The include ﬁle libsimple.h is created by the mcc compiler and must be include d

in the beginning of the C-source code.

line 11: The data interface between any MATLAB functions and the C-source Code is

deﬁned by a pointer to the data type mxArray (for more details see: [6]).

line 24: A more general way to convert double values to mxArrays, is to use a

mxCreateDoubleMatrix (see: line 20) and then make a memcpy operation. This

would be valid for all arrays:

memcpy(mxGetP r(pmxDoubleVar), &DoubleVar, n∗sizeof(double));

line 28: When working with MATLAB-functions the equal operator should be replaced by

the function mlfAssign. This ensures a robust memory management. mlfAssign

returns a pointer to the target array.

line 29: If a function has more than one output parameter, these parameters are passed to

the function as the ﬁrst input parameter of the type **mxArray. All other input

parameters are of the type *mxArray.

Some other examples for mixing M-ﬁles and C-code can be ﬁnd in [4]. For a complete list

of MATALB C/C++ API Functions with detailed short examples refer to [5, 7].

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 21

Nessun commento

MATLAB COMPILER 4 Manuale Utente Pagina 15