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subroutine stackg(id)
c =============================================================
c get variables from storage
c
c action realisees selon que la variable existe ou non :
c
c fin=0 : oui retour de la variable fin=-1
c non fin=0
c fin=-1 : oui fin=numero de la variable
c non fin=0
c fin=-2 : extraction ou recherche d'une macro pour execution
c oui retour d'une variable de type indirect fin=-1
c non fin=0
c fin=-3 : recherche dans l'environnement propre au niveau courant
c uniquement (insertion)
c oui : retour d'une variable de type indirect fin=-1
c non : retour d'une matrice vide fin=-1
c fin=-4 : demande de retour d'une variable de type indirect
c =============================================================
c
c Copyright INRIA
INCLUDE '../stack.h'
logical compil,vcopyobj
integer id(nsiz),fun1,vol,vk
c
logical eqid,local
integer iadr,sadr
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
if (ddt .eq. 4) then
call cvname(id,buf,1)
write(buf(nlgh+1:),'(i8)') fin
call basout(io,wte,' stackg '//buf(1:nlgh+9))
endif
c
if(err1.gt.0) return
c
if ( compil(2,id,fin,rhs,0)) goto 99
c
if(top+1.ge.bot) then
call error(18)
if(err.gt.0) return
endif
c
c set environnement where variable is searched
if(fin.eq.-3.and.(macr.ne.0.or.paus.ne.0)) then
k=lpt(1)-(13+nsiz)
last=lin(k+5)-1
local=.true.
else
last=isiz-1
local=.false.
endif
c
c look for id in the defined variables
k=bot-1
21 k = k+1
if(k.gt.last) then
c variable has not been found in the variables
k = 0
if(fin.eq.-3) then
call defmat
fin = -1
fun = 0
else
fin=0
endif
return
endif
if (.not.eqid(idstk(1,k), id)) go to 21
c
c variable has been found in position k
if(fin.eq.-1) then
fin=k
fun=0
return
endif
lk = lstk(k)
ilk=iadr(lk)
c
c perform operation on the found variable
if(fin.eq.-4) goto 31
if(fin.eq.-2) then
c extraction or macro call
if(abs(istk(ilk)).eq.11.or.abs(istk(ilk)).eq.13) then
c . macro call
if(istk(ilk).lt.0) lk=istk(ilk+1)
fin=lk
fun=0
return
endif
if(istk(ilk).gt.0) then
goto 31
else
goto 25
endif
elseif(fin.eq.-3) then
c insertion
if(istk(ilk).lt.0.and.local) then
c . insertion in a local indirect variable
c . replace indirect variable by its value
k1=istk(ilk+2)
if (k .ne. bot) then
c . shift storage down
vk=lstk(k+1)-lstk(k)
ls = lstk(bot)
call dcopy(lstk(k)-lstk(bot),stk(ls),-1,stk(ls+vk),-1)
do 26 i = k-1,bot,-1
call putid(idstk(1,i+1),idstk(1,i))
infstk(i+1)=infstk(i)
lstk(i+1) = lstk(i)+vk
26 continue
endif
c . destroy old variable
bot = bot+1
c . copy the value
vol=lstk(k1+1)-lstk(k1)
k=bot-1
lstk(k)=lstk(k+1)-vol
call dcopy(vol,stk(lstk(k1)),1,stk(lstk(k)),1)
call putid(idstk(1,k), id)
infstk(k)=0
bot=k
lk = lstk(k)
ilk=iadr(lk)
endif
goto 31
endif
c
c copy the variable at the top of the stack
if(istk(ilk).lt.0) then
c if indirect variable copy the variable pointed by
k=istk(ilk+2)
endif
25 top = top+1
if (.not.vcopyobj(' ',k,top)) return
infstk(top)=0
call putid(idstk(1,top),id)
go to 99
c
31 continue
c return indirect variable
top=top+1
il=iadr(lstk(top))
infstk(top)=0
call putid(idstk(1,top),id)
if(istk(ilk).gt.0) then
istk(il)=-istk(ilk)
istk(il+1)=lk
istk(il+2)=k
else
istk(il)=istk(ilk)
istk(il+1)=istk(ilk+1)
istk(il+2)=istk(ilk+2)
endif
lstk(top+1)=sadr(il+3)
goto 99
c
99 fin = -1
fun = 0
return
end
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