# include "scicos_block4.h" # include "../machine.h" #include <stdio.h> #if WIN32 #define NULL 0 #endif extern int C2F(dgetrf)(); typedef struct { int *ipiv; double *wrk; } mat_det_struct ; void mat_det(scicos_block *block,int flag) { double *u; double *y; int nu; int info; int i; double D,l; mat_det_struct *mdet; nu =GetInPortRows(block,1); u=GetRealInPortPtrs(block,1); y=GetRealOutPortPtrs(block,1); /*init : initialization*/ if (flag==4) {if((*(block->work)=(mat_det_struct*) scicos_malloc(sizeof(mat_det_struct)))==NULL) {set_block_error(-16); return;} mdet=*(block->work); if((mdet->ipiv=(int*) scicos_malloc(sizeof(int)*nu))==NULL) {set_block_error(-16); scicos_free(mdet); return;} if((mdet->wrk=(double*) scicos_malloc(sizeof(double)*(nu*nu)))==NULL) {set_block_error(-16); scicos_free(mdet->ipiv); scicos_free(mdet); return;} } /* Terminaison */ else if (flag==5) {mdet=*(block->work); if(mdet->wrk!=NULL) { scicos_free(mdet->ipiv); scicos_free(mdet->wrk); scicos_free(mdet); return;} } else { mdet=*(block->work); for (i=0;i<(nu*nu);i++) mdet->wrk[i]=u[i]; C2F(dgetrf)(&nu,&nu,mdet->wrk,&nu,mdet->ipiv,&info); if (info !=0) {if (flag!=6) {set_block_error(-7); return;}} D=1; for (i=0;i<nu;i++) {if((*(mdet->ipiv+i))!=i+1) D=-D; l=*(mdet->wrk+i*(nu+1)); D=D*l; }; *y=D; } }