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logical function getspmat(fname,topk,lw,type,m,n,nnz,lr)
C ==================================================
C verifie qu'il y a une matrice creuse scalaire
C a la position lw en renvoyant .true. ou .false.
C suivant la reponse
C Entree :
C lw : position (entier)
C Sortie :
C m, n dimensions
C lr : pointe sur le element de la matrice creuse
C ==================================================
C!
C implicit undefined (a-z)
character fname*(*)
integer topk,lw,m,n,lr
integer il
integer iadr
include '../stack.h'
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
il=iadr(lstk(lw))
C test particulier decouvert ds logic.f
if(istk(il).lt.0) il=iadr(istk(il+1))
if(istk(il).ne.5) then
getspmat=.false.
call cvname(ids(1,pt+1),fname,0)
err=rhs+(lw-topk)
call error(217)
else
m=istk(il+1)
n=istk(il+2)
type=istk(il+3)
nnz=istk(il+4)
lr=il+5+m+nnz
getspmat=.true.
endif
return
end
logical function mycspmatptr(name,m,n,type,nnz,lp)
c!purpose
c mycspmatptr returns the adress of real/complex sparse matrix "name"
c in scilab's internal stack
c m=number of rows
c n=number of columns
c type= 0 for double and 1 for complex
c stk(lp),stk(lp+1),...,stk(lp+nnz-1)= entries
c If matrix "name" not in Scilab stack, returns m=n=-1.
c
character*(*) name
integer type
c
include '../stack.h'
integer iadr,sadr
integer id(nsiz)
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
mycspmatptr=.false.
lon=0
do 100 i=1,csiz
if(name(i:i).eq.char(0)) goto 200
lon=lon+1
100 continue
200 continue
lon1=len(name)
if((lon1.gt.0).and.(lon1.lt.lon)) then
ln=lon1
else
ln=lon
endif
if(lon.eq.lon1) ln=lon
ln=min(nlgh,ln)
call cvname(id,name(1:ln),0)
c
fin=-1
call stackg(id)
if (fin .eq. 0) then
call putid(ids(1,pt+1),id)
call error(4)
m=-1
n=-1
return
endif
il=iadr(lstk(fin))
if(istk(il).ne.5)
$ call error(44)
if(err.gt.0) return
m=istk(il+1)
n=istk(il+2)
type=istk(il+3)
nnz=istk(il+4)
lp=sadr(il+5+m+nnz)
mycspmatptr=.true.
end
logical function mycspbmatptr(name,m,n,type,nnz,lp)
c!purpose
c mycspmatptr returns the adress of real/complex sparse matrix "name"
c in scilab's internal stack
c m=number of rows
c n=number of columns
c type= 0 for double and 1 for complex
c stk(lp),stk(lp+1),...,stk(lp+nnz-1)= entries
c If matrix "name" not in Scilab stack, returns m=n=-1.
c
character*(*) name
integer type
c
include '../stack.h'
integer iadr,sadr
integer id(nsiz)
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
mycspbmatptr=.false.
lon=0
do 100 i=1,csiz
if(name(i:i).eq.char(0)) goto 200
lon=lon+1
100 continue
200 continue
lon1=len(name)
if((lon1.gt.0).and.(lon1.lt.lon)) then
ln=lon1
else
ln=lon
endif
if(lon.eq.lon1) ln=lon
ln=min(nlgh,ln)
call cvname(id,name(1:ln),0)
c
fin=-1
call stackg(id)
if (fin .eq. 0) then
call putid(ids(1,pt+1),id)
call error(4)
m=-1
n=-1
return
endif
il=iadr(lstk(fin))
if(istk(il).ne.6)
$ call error(44)
if(err.gt.0) return
m=istk(il+1)
n=istk(il+2)
type=istk(il+3)
nnz=istk(il+4)
lp=sadr(il+5+m+nnz)
mycspbmatptr=.true.
end
logical function mycmatptr(name,m,n,type,lp)
c!purpose
c matptr returns the adress of real matrix "name"
c in scilab's internal stack
c m=number of rows
c n=number of columns
c type= 0 for double and 1 for complex
c stk(lp),stk(lp+1),...,stk(lp+m*n-1)= entries (columnwise)
c If matrix "name" not in Scilab stack, returns m=n=-1.
c
c Example of use:
c Amat is a real 2 x 3 scilab matrix
c your subroutine should be as follows:
c
c subroutine mysubr(...)
c include '../stack.h'
c ...
c logic= cmatptr('Amat',m,n,lp)
c => m=3 , n=2, and stk(lp)=Amat(1,1)
c stk(lp+1)=Amat(2,1)
c stk(lp+2)=Amat(3,1)
c stk(lp+3)=Amat(1,2) ...
c stk(lp+5)=Amat(3,2)
c see example in fydot.f file
c see also readmat.f, matz.f
character*(*) name
integer type
c
include '../stack.h'
integer iadr,sadr
integer id(nsiz)
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
mycmatptr=.false.
lon=0
do 100 i=1,csiz
if(name(i:i).eq.char(0)) goto 200
lon=lon+1
100 continue
200 continue
lon1=len(name)
if((lon1.gt.0).and.(lon1.lt.lon)) then
ln=lon1
else
ln=lon
endif
if(lon.eq.lon1) ln=lon
ln=min(nlgh,ln)
call cvname(id,name(1:ln),0)
c
fin=-1
call stackg(id)
if (fin .eq. 0) then
call putid(ids(1,pt+1),id)
call error(4)
m=-1
n=-1
return
endif
il=iadr(lstk(fin))
if(istk(il).ne.1.or.(istk(il+3).ne.0.and.istk(il+3).ne.1))
$ call error(44)
if(err.gt.0) return
m=istk(il+1)
n=istk(il+2)
type = istk(il+3)
lp=sadr(il+4)
mycmatptr=.true.
end
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