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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=-6 : similaire a fin=-1, pour la fonction global uniquement
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 fin=-5 : recherche dans la zone globale
c oui : fin=numero de la variable
c non fin=0
c =============================================================
c
c Copyright INRIA
INCLUDE '../stack.h'
logical compil,vcopyobj
integer id(nsiz),fun1,vol,vk
integer cbot
c
logical eqid,local
integer iadr
c
iadr(l)=l+l-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
cbot=bot
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.
elseif(fin.ne.-5) then
last=isiz-1
local=.false.
else
last=gtop
cbot=isiz+2
local=.false.
endif
c
c look for id in the defined variables
k=cbot-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(infstk(k).eq.2) then
c . found a pointer on a global variable
kg=istk(iadr(lstk(k))+2)
c . does global variable variable really exists
if (kg.gt.gtop.or.(.not.eqid(idstk(1,kg),id))) then
if (fin.ne.-6) then
call putid(ids(1,pt+1),id)
call error(228)
endif
fin=0
return
endif
if(fin.eq.-3.or.fin.eq.-2) k=kg
endif
if(fin.eq.-1.or.fin.eq.-5.or.fin.eq.-6) 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 unsfdcopy(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
ilk1=iadr(lstk(k1))
vol=lstk(k1+1)-lstk(k1)
k=bot-1
if (lstk(k+1)-vol.lt.lstk(1)) then
err=-(lstk(k+1)-vol-lstk(1))
call error(17)
return
endif
lstk(k)=lstk(k+1)-vol
call unsfdcopy(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)
if(k.eq.0) then
c . indirection to a list entry
top = top+1
lt=lstk(top)
is=istk(ilk+3)
err=lt+is-lstk(bot)
if(err.gt.0) then
call error(17)
return
endif
call dcopy(is,stk(istk(ilk+1)),1,stk(lt),1)
lstk(top+1)=lstk(top)+is
infstk(top)=0
goto 27
endif
endif
25 top = top+1
if (.not.vcopyobj(' ',k,top)) return
infstk(top)=infstk(k)
if(infstk(top).ne.2) infstk(top)=0
27 call putid(idstk(1,top),id)
go to 99
c
31 continue
c return indirect variable
call createref(ilk,k,lstk(k+1)-lstk(k))
infstk(top)=infstk(k)
if(infstk(top).ne.2) infstk(top)=0
call putid(idstk(1,top),id)
goto 99
c
99 fin = -1
fun = 0
return
end
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