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#include <string.h>
#include "stack-c.h"
typedef void (*voidf)();
typedef struct {
char *name;
voidf f;
} FTAB;
/*******************************************
* Table of predefined functions f1c and f2c
*******************************************/
#define ARGS_ex15c double,double, double *
typedef int (*funcex) __PARAMS((ARGS_ex15c));
extern int f1c __PARAMS((ARGS_ex15c));
extern int f2c __PARAMS((ARGS_ex15c));
extern int ex15c __PARAMS((double *,integer ,double *,integer,double *, funcex));
FTAB FTab_ex15c[] ={
{"f1c", (voidf) f1c},
{"f2c", (voidf) f2c},
{(char *) 0, (voidf) 0}};
/***************************************************
* deal with errors in scilab functions
***************************************************/
#include <setjmp.h>
static jmp_buf ex15cenv;
/***************************************************
* data for interface
***************************************************/
static int sci_f, lhs_f, rhs_f;
/***************************************************
* Functions
***************************************************/
static int sciex15c __PARAMS((ARGS_ex15c));
static funcex Argex15c;
/***************************************************
* intex15c interface for ex15c
***************************************************/
int intex15c(fname)
char *fname;
{
int returned_from_longjump ;
int m_X,n_X,l_X,m_Y,n_Y,l_Y,m_Z,n_Z,l_Z;
static int minlhs=1, minrhs=3, maxlhs=1, maxrhs=3;
/* Check rhs and lhs */
CheckRhs(minrhs,maxrhs) ;
CheckLhs(minlhs,maxlhs) ;
/* Variable #1 (X = real vector) */
GetRhsVar(1, "d", &m_X, &n_X, &l_X);
/* Variable #2 (Y = real vector) */
GetRhsVar(2, "d", &m_Y, &n_Y, &l_Y);
/* Variable #3 (f = "argument function") */
/* ex15c(X,Y,f)
* if f is a string we search for f in Tables and on succes
* Argex15c will be the function to be called
* if f is a macro then sciex15c will be called (see its definition bellow)
* returned arguments are sci_f, lhs_f, rhs_f
* function position in the stack sci_f required lhs and rhs in lhs_f, rhs_f
* (we do not use lhs_f and rhs_f in this example)
*/
Argex15c = (funcex) GetFuncPtr("ex15c", 3, FTab_ex15c, (voidf) sciex15c, &sci_f, &lhs_f, &rhs_f);
if ( Argex15c == (funcex) 0 ) return 0;
m_Z= m_X*n_X; n_Z= m_Y*n_Y;
/* Creating the output variable Z (#4) , real matrix variable with m_Z rows and n_Z columns */
CreateVar(4, "d", &m_Z, &n_Z, &l_Z);
/* If an error occurs while Z is calculated ... */
if (( returned_from_longjump = setjmp(ex15cenv)) != 0 )
{
Scierror(999,"%s: Internal error \r\n",fname);
return 0;
}
/* Now matrix Z is populated i.e. appropriate values are
* assigned to stk(l_Z)[0] ( = Z(1,1) ), stk(l_Z)[1] ( = Z(2,1) ), ...
*/
ex15c(stk(l_X), m_X*n_X, stk(l_Y), m_Y*n_Y, stk(l_Z), Argex15c);
/* Variable #4 is returned to Scilab */
LhsVar(1) = 4;
return 0;
}
/*---------------------------------------------------------------
* Computing z=f(x,y), f being the Scilab argument function
* C function emulating the Scilab function pointed to by sci_f
*---------------------------------------------------------------*/
static int sciex15c(x, y, z)
double x, y, *z;
{
static int lhs=1,rhs=2;
int scilab_i,scilab_j, un=1;
/* Inputs (x(i),y(j)) at positions (5,6) */
CreateVar(5, "d", &un, &un, &scilab_i);
stk(scilab_i)[0] = x;
CreateVar(6, "d", &un, &un, &scilab_j);
stk(scilab_j)[0] = y;
/* executes the Scilab function (f) pointed to by sci_f.
* we provide a rhs=2 and expect lhs = 1
*/
PExecSciFunction(5, &sci_f, &lhs, &rhs, "ArgFex", ex15cenv);
/* One output at position of first input (5) */
*z = *stk(scilab_i);
return 0;
}
/*---------------------------------------------------------------
* function which calculates Z=ex15c(X,Y,f) : given x, y and f,
* the array z is such that z[i,j]=f(x[i],y[j])
*---------------------------------------------------------------*/
int ex15c(x, nx, y, ny, z, f)
double *x,*y,*z;
int nx,ny;
funcex f;
{
int i,j;
for ( i = 0 ; i < nx ; i++ )
for ( j = 0 ; j < ny ; j++)
(*f)(x[i], y[j], &z[i+nx*j]);
return 0;
}
/*---------------------------------------------------------------
* Two examples of argument functions f. Scilab usage:
* Z=ex15c(X,Y,"f1c")
* or
* Z=ex15c(X,Y,"f2c")
*---------------------------------------------------------------*/
int f1c(x,y,z)
double x,y,*z;
{
*z= x+y;
return 0;
}
int f2c(x,y,z)
double x,y,*z;
{
*z= x*x+y*y;
return 0;
}
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