Computational routine
eng

##
matz_bksl

### File content

    # include "scicos_block4.h"
    # include "../machine.h"
    #include <stdio.h>
    #include <math.h>
    extern int C2F(zlacpy)();
    extern int C2F(zgetrf)();
    extern double C2F(dlamch)();
    extern double C2F(zlange)();
    extern int C2F(zgecon)();
    extern int C2F(zgetrs)();
    extern int C2F(zgelsy1)();

    #if WIN32
    #define NULL    0
    #endif

    #ifndef min
    #define min(a,b) ((a) <= (b) ? (a) : (b))
    #endif

    #ifndef max
    #define max(a,b) ((a) >= (b) ? (a) : (b))
    #endif

    typedef struct
    {         int *ipiv;
              int *rank;
              int *jpvt;
              double *iwork;
              double *dwork;
    	  double *IN1F;
    	  double *IN1;
    	  double *IN2X;
    	  double *IN2;
    } mat_bksl_struct ;
    void matz_bksl(scicos_block *block,int flag)
    {
     double *u1r,*u1i;
     double *u2r,*u2i;
     double *yr,*yi;
     int mu,vu,wu;
     int nu1;
     int nu2;
     int info;
     int i,j,l,lw,lu,rw,ij,k;
     mat_bksl_struct *ptr;
     double rcond, ANORM, EPS;
     vu =GetOutPortRows(block,1);
     wu =GetOutPortCols(block,1);
     mu =GetInPortRows(block,1);
     nu1 =GetInPortCols(block,1);
     nu2 =GetInPortCols(block,2);
     u1r=GetRealInPortPtrs(block,1);
     u1i=GetImagInPortPtrs(block,1);
     u2r=GetRealInPortPtrs(block,2);
     u2i=GetImagInPortPtrs(block,2);
     yr=GetRealOutPortPtrs(block,1);
     yi=GetImagOutPortPtrs(block,1);
     l=max(mu,nu1);
     lw=max(2*min(mu,nu1),nu1+1);
     lu=max(lw,min(mu,nu1)+nu2);
     lw=max(2*nu1,min(mu,nu1)+lu);
     rw=2*nu1;
                 /*init : initialization*/
    if (flag==4)
       {if((*(block->work)=(mat_bksl_struct*) scicos_malloc(sizeof(mat_bksl_struct)))==NULL)
    	{set_block_error(-16);
    	 return;}
        ptr=*(block->work);
        if((ptr->ipiv=(int*) scicos_malloc(sizeof(int)*nu1))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->rank=(int*) scicos_malloc(sizeof(int)))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->jpvt=(int*) scicos_malloc(sizeof(int)*nu1))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->iwork=(double*) scicos_malloc(sizeof(double)*2*nu1))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->dwork=(double*) scicos_malloc(sizeof(double)*2*lw))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->iwork);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->IN1F=(double*) scicos_malloc(sizeof(double)*(2*mu*nu1)))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->dwork);
    	 scicos_free(ptr->iwork);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->IN1=(double*) scicos_malloc(sizeof(double)*(2*mu*nu1)))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->IN1F);
    	 scicos_free(ptr->dwork);
    	 scicos_free(ptr->iwork);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->IN2X=(double*) scicos_malloc(sizeof(double)*(2*l*nu2)))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->IN1);
    	 scicos_free(ptr->IN1F);
    	 scicos_free(ptr->dwork);
    	 scicos_free(ptr->iwork);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
        if((ptr->IN2=(double*) scicos_malloc(sizeof(double)*(2*mu*nu2)))==NULL)
    	{set_block_error(-16);
    	 scicos_free(ptr->IN2);
    	 scicos_free(ptr->IN1);
    	 scicos_free(ptr->IN1F);
    	 scicos_free(ptr->dwork);
    	 scicos_free(ptr->iwork);
    	 scicos_free(ptr->jpvt);
    	 scicos_free(ptr->rank);
    	 scicos_free(ptr->ipiv);
    	 scicos_free(ptr);
    	 return;}
       }

           /* Terminaison */
    else if (flag==5)
       {ptr=*(block->work);
        if((ptr->IN2)!=NULL){
        	scicos_free(ptr->ipiv);
        	scicos_free(ptr->rank);
        	scicos_free(ptr->jpvt);
        	scicos_free(ptr->iwork);
        	scicos_free(ptr->IN1F);
        	scicos_free(ptr->IN1);
        	scicos_free(ptr->IN2X);
        	scicos_free(ptr->IN2);
        	scicos_free(ptr->dwork);
        	scicos_free(ptr);
        	return;}
       }

    else
       {
        ptr=*(block->work);
        for (i=0;i<(mu*nu1);i++)
    	{ptr->IN1[2*i]=u1r[i];
    	 ptr->IN1[2*i+1]=u1i[i];}
        for (i=0;i<(mu*nu2);i++)
    	{ptr->IN2[2*i]=u2r[i];
    	 ptr->IN2[2*i+1]=u2i[i];}
        EPS=C2F(dlamch)("e",1L);
        ANORM=C2F(zlange)("1",&mu,&nu1,ptr->IN1,&mu,ptr->dwork);
        if (mu==nu1)
    	{C2F(zlacpy)("F",&mu,&nu1,ptr->IN1,&mu,ptr->IN1F,&mu);
    	 C2F(zgetrf)(&nu1,&nu1,ptr->IN1F,&nu1,ptr->ipiv,&info);
    	 rcond=0;
     	 if (info==0)
    	    {C2F(zgecon)("1",&nu1,ptr->IN1F,&nu1,&ANORM,&rcond,ptr->dwork,ptr->iwork,&info);
    	     if (rcond>pow(EPS,0.5))
    		{
    		 C2F(zgetrs)("N",&nu1,&nu2,ptr->IN1F,&nu1,ptr->ipiv,ptr->IN2,&nu1,&info);
    		 for (i=0;i<(mu*nu2);i++)
    	   	 {*(yr+i)=*(ptr->IN2+2*i);
    	    	  *(yi+i)=*(ptr->IN2+(2*i)+1);}
    		 return;
    		}
    	    }
    	}
        rcond=pow(EPS,0.5);
        for (i=0;i<nu1;i++)    *(ptr->jpvt+i)=0;
        C2F(zlacpy)("F",&mu,&nu2,ptr->IN2,&mu,ptr->IN2X,&l);
        C2F(zgelsy1)(&mu,&nu1,&nu2,ptr->IN1,&mu,ptr->IN2X,&l,ptr->jpvt,&rcond,ptr->rank,ptr->dwork,&lw,ptr->iwork,&info);
        if (info!=0)
    	{if (flag!=6)
    	    {set_block_error(-7);
                 return;
    	    }
    	}
    	k=0;
    	for(j=0;j<wu;j++)
    	    {for(i=0;i<vu;i++)
    		{ij=i+j*l;
    		 *(yr+k)=*(ptr->IN2X+2*ij);
    	 	 *(yi+k)=*(ptr->IN2X+(2*ij)+1);
    		k++;}}
        }
    }