CheckLhs

Arguments

nb_min_params

the minimum number of output arguments which must be present in the calling Scilab function

nb_max_params

the maximum number of output arguments which must be present in the calling Scilab function

Description

C macro which checks the number of output arguments present in the calling Scilab function. You must include stack-c.h to benefit from this function.

If the number of arguments is not between nb_min_params and nb_max_params, we quit the C interface (return 0;) and an error is returned in the Scilab console.

Since CheckLhs is doing a return 0; within the gateway function, it is important to call this macro before any memory allocation in order to avoid any memory leak.

WARNING: This API is deprecated from Scilab 5.2.0 and is going to be removed with Scilab 6.0. Please use API Scilab (the new Scilab API).

Examples

In this example, the C gateway function checks for a number of output arguments which must be between 2 and 3.

#include <stack-c.h>

int sci_mychecklhs(char * fname)
{
  CheckLhs(2,3);

  return 0;
}

Now, some functions testing this interface:

[A,B] = mychecklhs(); // OK, 2 output arguments
[A,B,C] = mychecklhs(); // OK, 3 output arguments
[A] = mychecklhs(); // ERROR, 1 output argument
[A,B,C,D] = mychecklhs(); // ERROR, 4 output arguments

See Also

• CheckRhs — C macro which checks the number of input arguments present in the calling Scilab function.