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subroutine createref(il,topk,sz)
c =============================================================
c create a reference to a variable at the top of the stack
c =============================================================
c
c Copyright INRIA
include '../stack.h'
c
c il : pointer on the beginning of the variable
c topk : index of the variable in lstk if any
c sz : mem size of the variable
c
integer topk,sz
integer iadr,sadr
c
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
top=top+1
if(top.ge.bot) then
call error(18)
return
endif
c
ilv=iadr(lstk(top))
err=sadr(ilv+4)-lstk(bot)
if(err.gt.0) then
call error(17)
return
endif
if(istk(il).lt.0) then
call icopy(4,istk(il),1,istk(ilv),1)
else
istk(ilv)=-istk(il)
istk(ilv+1)=sadr(il)
istk(ilv+2)=topk
istk(ilv+3)=sz
endif
lstk(top+1)=sadr(ilv+4)
return
end
subroutine setref(topk)
c =============================================================
c creates a variable on the top of stack to inform stackp that
c corresponding variable as already been stored
c =============================================================
c
c Copyright INRIA
include '../stack.h'
c
c topk : index of the stored variable in lstk
c
integer topk
integer iadr,sadr
c
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
top=top+1
if(top.ge.bot) then
call error(18)
return
endif
c
ilv=iadr(lstk(top))
err=sadr(ilv+4)-lstk(bot)
if(err.gt.0) then
call error(17)
return
endif
istk(ilv)=-1
istk(ilv+1)=-1
istk(ilv+2)=topk
if(topk.gt.0) then
istk(ilv+3)=lstk(topk+1)-lstk(topk)
else
istk(ilv+3)=0
endif
lstk(top+1)=sadr(ilv+4)
return
end
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