Computational routine
eng


mat_sing

File content


# include "scicos_block4.h"
# include "../machine.h"
#include <stdio.h>
extern int C2F(dgesvd)();
extern int C2F(dlaset)();
extern int C2F(dlacpy)();

#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
{	  double *LA;
          double *LU;
          double *LVT;
          double *dwork;
} mat_sing_struct ;
void mat_sing(scicos_block *block,int flag)
{
 double *u;
 double *y;
 int nu,mu;
 int info;
 int lwork;
 mat_sing_struct *ptr;
 mu=GetInPortRows(block,1);
 nu=GetInPortCols(block,1);
 u=GetRealInPortPtrs(block,1);
 y=GetRealOutPortPtrs(block,1);
 lwork=max(3*min(mu,nu)+max(mu,nu),5*min(mu,nu)-4); 
             /*init : initialization*/
if (flag==4)
   {if((*(block->work)=(mat_sing_struct*) scicos_malloc(sizeof(mat_sing_struct)))==NULL)
	{set_block_error(-16);
	 return;}
    ptr=*(block->work);
    if((ptr->LA=(double*) scicos_malloc(sizeof(double)*(mu*nu)))==NULL)
	{set_block_error(-16);
	 scicos_free(ptr);
	 return;}
    if((ptr->LU=(double*) scicos_malloc(sizeof(double)*(mu*mu)))==NULL)
	{set_block_error(-16);
	 scicos_free(ptr->LA);
	 scicos_free(ptr);
	 return;}
    if((ptr->LVT=(double*) scicos_malloc(sizeof(double)*(nu*nu)))==NULL)
	{set_block_error(-16);
	 scicos_free(ptr->LU);
	 scicos_free(ptr->LA);
	 scicos_free(ptr);
	 return;}
    if((ptr->dwork=(double*) scicos_malloc(sizeof(double)*lwork))==NULL)
	{set_block_error(-16);
	 scicos_free(ptr->LVT);
	 scicos_free(ptr->LU);
	 scicos_free(ptr->LA);
	 scicos_free(ptr);
	 return;}
   }

       /* Terminaison */
else if (flag==5)
   {ptr=*(block->work);
    if(ptr->dwork!=0) {
    	scicos_free(ptr->LA);
    	scicos_free(ptr->LU);
    	scicos_free(ptr->LVT);
    	scicos_free(ptr->dwork);
    	scicos_free(ptr);
    	return;}
   }

else
   {
    ptr=*(block->work);
    C2F(dlacpy)("F",&mu,&nu,u,&mu,ptr->LA,&mu);
    C2F(dgesvd)("A","A",&mu,&nu,ptr->LA,&mu,y,ptr->LU,&mu,ptr->LVT,&nu,ptr->dwork,&lwork,&info);
     if (info !=0)
       {if (flag!=6)
   	{set_block_error(-7);
         return;}}
   }
}