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#include "stack-c.h"
extern int ex1c __PARAMS((char *ch, int *a, int *ia, float *b, int *ib, double *c, int *mc, int *nc, double *d, double *w, int *err));
/**************************************************
* An example of an hand written interface
* the function to be interfaced is ex1c (see below)
* the interface program is intex1c
* the associated scilab function is ex1c (see file ex01.sce)
*
* Shows how to pass
* - Scilab scalar matrices as int,float or double arrays
* - Scilab string as C-string
* how to create and return new scalar matrices
**************************************************/
int intex1c(fname)
char *fname;
{
int i1, i2;
static int ierr;
static int l1, m1, n1, m2, n2, l2, m3, n3, l3, m4, n4, l4, l5, l6;
static int minlhs=1, minrhs=4, maxlhs=5, maxrhs=4;
CheckRhs(minrhs,maxrhs) ;
CheckLhs(minlhs,maxlhs) ;
/* 1-Get the 4 input variables of ex1f:
*
* Variable #1 is a chain ("c") , GetRhsVar returns its
* dimensions: m1 = # of rows = length of the chain,
* n1 = # of columns = 1 default value for chains.
* The chain starts at cstk(l1)
*/
GetRhsVar(1, "c", &m1, &n1, &l1);
/* a=variable #2 is an integer ('i') matrix, getrhsvar returns its
* dimensions: m2 = # of rows , n2 = # of columns
* values in matrix a are istk(l2), istk(l2+1), ... (columnwise)
*/
GetRhsVar(2, "i", &m2, &n2, &l2);
/* b=variable #3 is an real ('r') matrix, getrhsvar returns its
* dimensions: m3 = # of rows , n3 = # of columns
* values in matrix a are sstk(l2), sstk(l2+1), ... (columnwise)
*/
GetRhsVar(3, "r", &m3, &n3, &l3);
/* c=variable #4 is an double ('d') matrix, getrhsvar returns its
* dimensions: m4 = # of rows , n4 = # of columns
* values in matrix a are stk(l2), stk(l2+1), ... (columnwise)
*/
GetRhsVar(4, "d", &m4, &n4, &l4);
/* 2-Create Scilab variable #5 as double matrix of
* dimensions m4 x n4. The first fourth parameters of
* Createvar are input parameters. Createvar returns the adress l5
* as output.
* The values of stk(l5), stk(l5+1), ... should be set
* to desired values.
*/
CreateVar(5, "d", &m4, &n4, &l5);
CreateVar(6, "d", &m4, &n4, &l6);
i1 = n2 * m2;
i2 = n3 * m3;
ex1c( cstk(l1),istk(l2), &i1, sstk(l3), &i2, stk(l4),
&m4, &n4, stk(l5),stk(l6), &ierr);
if (ierr > 0)
{
Scierror(999,"%s: Internal error \r\n",fname);
return 0;
}
/* Variables #5, #4, #3, #2, #1 are returned in that
* order. For instance, w=ex1f('chain',a,b,c) puts
* in w the variable #5 and [w,r]=ex1f('chain',a,b,c)
* puts in w the variable #5 and in r the variable #4
*/
LhsVar(1) = 5;
LhsVar(2) = 4;
LhsVar(3) = 3;
LhsVar(4) = 2;
LhsVar(5) = 1;
return 0;
}
/**************************************************
* inputs: ch, a,b and c; ia,ib and mc,nc
* ch=character, a=integer, b=float and c=double
* ia,ib and [mc,nc] are the dimensions of a,b and c resp.
* outputs: a,b,c,d
* if ch='mul' a,b and c = 2 * (a,b and c)
* and d of same dimensions as c with
* d(i,j)=(i+j)*c(i,j)
* if ch='add' a,b and c = 2 + (a,b and c)
* d(i,j)=(i+j)+c(i,j)
* w is a working array of size [mc,nc]
*********************************************/
int ex1c(ch, a, ia, b, ib, c, mc, nc, d, w, err)
char *ch; int *a, *ia; float *b;
int *ib; double *c; int *mc, *nc;
double *d, *w; int *err;
{
static int i, j, k;
*err = 0;
if (strcmp(ch, "mul") == 0)
{
for (k = 0 ; k < *ib; ++k)
a[k] <<= 1;
for (k = 0; k < *ib ; ++k)
b[k] *= (float)2.;
for (i = 0 ; i < *mc ; ++i)
for (j = 0 ; j < *nc ; ++j)
c[i + j *(*mc) ] *= 2.;
for (i = 0 ; i < *mc ; ++i)
for (j = 0 ; j < *nc ; ++j)
{
w[i + j * (*mc) ] = (double) (i + j);
d[i + j * (*mc) ] = w[i + j *(*mc)] * c[i + j *(*mc)];
}
}
else if (strcmp(ch, "add") == 0)
{
for (k = 0; k < *ia ; ++k)
a[k] += 2;
for (k = 0 ; k < *ib ; ++k)
b[k] += (float)2.;
for (i = 0 ; i < *mc ; ++i)
for (j = 0 ; j < *nc ; ++j)
c[i + j *(*mc) ] += 2.;
for (i = 0 ; i < *mc ; ++i)
for (j = 0 ; j < *nc ; ++j)
{
w[i + j * (*mc) ] = (double) (i + j);
d[i + j * (*mc) ] = w[i + j *(*mc)] + c[i + j *(*mc)];
}
}
else
{
*err = 1;
}
return(0);
}
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