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subroutine ext1f(n,a,b,c)
c (very) simple example 1
c -->link('ext1f.o','ext1f');
c -->a=[1,2,3];b=[4,5,6];n=3;
c -->c=call('ext1f',n,1,'i',a,2,'d',b,3,'d','out',[1,3],4,'d')
c c=a+b
double precision a(*),b(*),c(*)
do 1 k=1,n
c(k)=a(k)+b(k)
1 continue
return
end
subroutine ext2f(n,a,b,c)
c simple example 2 (using sin and cos)
c -->link('ext2f.o','ext2f');
c -->a=[1,2,3];b=[4,5,6];n=3;
c -->c=call('ext2f',n,1,'i',a,2,'d',b,3,'d','out',[1,3],4,'d')
c -->c=sin(a)+cos(b)
double precision a(*),b(*),c(*)
do 1 k=1,n
c(k)=sin(a(k))+cos(b(k))
1 continue
return
end
subroutine ext3f(ch,n,a,b,c)
c ----------------------------
c example 3 (passing a chain)
c -->link('ext3f.o','ext3f');
c -->a=[1,2,3];b=[4,5,6];n=3;
c -->c=call('ext3f','yes',1,'c',n,2,'i',a,3,'d',b,4,'d','out',[1,3],5,'d')
c -->c=sin(a)+cos(b)
c -------------------------------------
double precision a(*),b(*),c(*)
character*(*) ch
if(ch(1:3).eq.'yes') then
do 1 k=1,n
c(k)=sin(a(k))+cos(b(k))
1 continue
else
do 2 k=1,n
c(k)=a(k)+b(k)
2 continue
endif
return
end
subroutine ext4f(n,a,b,c)
c example 4 (reading a chain)
c -->link('ext4f.o','ext4f');
c -->a=[1,2,3];b=[4,5,6];n=3;yes='yes'
c -->c=call('ext4f',n,1,'i',a,2,'d',b,3,'d','out',[1,3],4,'d')
c -->c=sin(a)+cos(b)
c -->yes='no'
c -->c=a+b
c -->clear yes --> undefined variable : yes
double precision a(*),b(*),c(*)
logical creadchain
parameter (ichmax=10)
character ch*(ichmax)
c If chain named yes exists reads it in ch else return
lch=ichmax
if(.not.creadchain('yes'//char(0),lch,ch)) return
c *********************************
if(ch(1:lch).eq.'yes') then
do 1 k=1,n
c(k)=sin(a(k))+cos(b(k))
1 continue
else
do 2 k=1,n
c(k)=a(k)+b(k)
2 continue
endif
return
end
subroutine ext5f(b,c)
c example 5
c reading a vector in scilab internal stack using creadmat
c (see SCIDIR/system2/creadmat.f)
c -->link('ext5f.o','ext5f')
c -->a=[1,2,3];b=[2,3,4];
c -->c=call('ext5f',b,1,'d','out',[1,3],2,'d')
c -->c=a+2*b
double precision a(3),b(*),c(*)
logical creadmat
c If 'a' exists reads it else return
if(.not.creadmat('a'//char(0),m,n,a)) then
write(6,*) 'ext5', m,n,a(1),a(2),a(3)
return
endif
do 1 k=1,n
c(k)=a(k)+2.0d0*b(k)
1 continue
return
end
subroutine ext6f(aname,b,c)
c example 6
c reading a vector in scilab internal stack using readmat interface
c -->link('ext6f.o','ext6f')
c -->a=[1,2,3];b=[2,3,4];
c -->c=call('ext6f','a',1,'c',b,2,'d','out',[1,3],3,'d')
c -->c=a+2*b
double precision a(3),b(*),c(*)
logical creadmat
character*(*) aname
c If aname exists reads it (in a) else return
if(.not.creadmat(aname,m,n,a)) return
c
c [m,n]=size(a) here m=1 n=3
do 1 k=1,n
c(k)=a(k)+2.0d0*b(k)
1 continue
return
end
subroutine ext7f(a,b)
c example 7
c creating vector c in scilab internal stack
c -->link('ext7f.o','ext7f')
c -->a=[1,2,3]; b=[2,3,4];
c c does not exist (c made by the call to matz)
c -->call('ext7f',a,1,'d',b,2,'d','out',1);
c c now exists
c -->c=a+2*b
double precision a(3),b(3),c(3),w
logical cwritemat,cwritechain
do 1 k=1,3
c(k)=a(k)+2.0d0*b(k)
1 continue
c sending c array values to c Scilab variable
c of size [1,3]
if (.not.cwritemat('c'//char(0),1,3,c)) return
c sending string 'test' (size 4) to Scilab variable d
if (.not.cwritechain('d'//char(0),4,'test')) return
return
end
subroutine ext8f(y)
c -------------------------------------------
c same example with call to cmatptr
c -->param=[1,2,3];
c -->link('ext8c.o','ext8c','C');
c -->y=call('ext8c','out',size(param),1,'d');
logical cmatptr
double precision y(*)
include '../routines/stack.h'
c If variable 'param' exists gets its pointer in
c internal stack else return
if(.not.cmatptr('param'//char(0),m,n,lp)) return
c ********************************
c param entries are in stk(lp+i),i=0,m*n
do 10 i=1,m*n
y(i) = stk(lp+i-1)
10 continue
return
end
subroutine ext9f(n, t, y, ydot)
c argument function for ode
c input variables n, t, y
c n = dimension of state vector y
c t = time
c y = state variable
c output variable = ydot
c
c external routine must
c load ydot(1) with d/dt ( y(1)(t) )
c ydot(2) with d/dt ( y(2)(t) )
c ...
c i.e. ydot vector of derivative of state y
c
c Example:
c call this ext9f routine:
c ode([1;0;0],0,[0.4,4],'ext9f')
c
c With dynamic link:
c -->link('ext9f.o','ext9f')
c -->ode([1;0;0],0,[0.4,4],'ext9f')
c
double precision t, y, ydot
dimension y(3), ydot(3)
ydot(1) = -.0400d+0*y(1) + 1.0d+4*y(2)*y(3)
ydot(3) = 3.0d+7*y(2)*y(2)
ydot(2) = -ydot(1) - ydot(3)
end
subroutine ext10f(n, t, y, ydot)
c external fonction for ode
c input variables n, t, y
c n = dimension of state vector y
c t = time
c y = state variable
c output variable = ydot
c
c external routine must
c load ydot(1) with d/dt ( y(1)(t) )
c ydot(2) with d/dt ( y(2)(t) )
c ...
c i.e. ydot vector of derivative of state y
c
c With dynamic link:
c link('ext10f.o','ext10f')
c
c passing a parameter to ext10f routine by a list:
c -->param=[0.04,10000,3d+7];
c -->y=ode([1;0;0],0,[0.4,4],list('ext10f',param))
c param is retrieved in ext10f by:
c param(1)=y(n+1) , param(2)=y(n+2) etc
c with this calling sequence y is a n+np vector
c where np=dimension of scilab variable param
c
double precision t, y, ydot, param
dimension y(3), ydot(3),param(3)
param(1)=y(n+1)
param(2)=y(n+2)
param(3)=y(n+3)
ydot(1) = -param(1)*y(1) + param(2)*y(2)*y(3)
ydot(3) = param(3)*y(2)*y(2)
ydot(2) = -ydot(1) - ydot(3)
end
subroutine ext11f(neq, t, y, ydot)
c -------------------------------------------
c exemple with a call to readmat routine
c -->param=[0.04,10000,3d+7];
c -->link('ext11f.o','ext11f')
c -->y=ode([1;0;0],0,[0.4,4],'ext11f')
c param must be defined as a scilab variable
double precision t, y, ydot, param
logical creadmat
dimension y(3), ydot(3), param(3)
c If "param" does not exists return else loads param
if(.not.creadmat('param'//char(0),m,n,param)) return
c ***********************************
ydot(1) = -param(1)*y(1) + param(2)*y(2)*y(3)
ydot(3) = param(3)*y(2)*y(2)
ydot(2) = -ydot(1) - ydot(3)
return
end
subroutine ext12f(neq, t, y, ydot)
c -------------------------------------------
c same example with call to cmatptr
c param must be defined as a scilab variable
c exemple with a call to cmatptr function
c -->param=[0.04,10000,3d+7];
c -->link('ext12f.o','ext12f')
c -->y=ode([1;0;0],0,[0.4,4],'ext12f')
double precision t, y, ydot
logical cmatptr
dimension y(3), ydot(3)
c
include '../routines/stack.h'
c
c If variable 'param' exists gets its pointer in
c internal stack else return
if(.not.cmatptr('param'//char(0),m,n,lp)) return
c ********************************
c param entries are in stk(lp),stk(lp+1),stk(lp+2)
c i.e. param(1)= stk(lp), ...
c m,n = dimensions of param = 3,1 (or 1,3 if row v.)
c (note that vector param not used in this example)
ydot(1) = -stk(lp)*y(1) + stk(lp+1)*y(2)*y(3)
ydot(3) = stk(lp+2)*y(2)*y(2)
ydot(2) = -ydot(1) - ydot(3)
return
end
subroutine ext13f(n,a)
common/cmntest/b(10)
real a(*)
do 1 k=1,max(n,10)
1 b(k)=a(k)
end
subroutine ext14f(n,c)
common/cmntest/b(10)
real c(*)
do 1 k=1,max(n,10)
1 c(k)=b(k)
end
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