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subroutine showstack()
c -------------------------
c this routines handle display of calling tree
c!
c Copyright INRIA
include '../stack.h'
c
integer sadr
c
character mg*9
integer lunit,lpt1(6),top1
integer l1,ilk,m,lk,km,k,ll,r,p
logical first
data mg /' ! '/
c
sadr(l)=(l/2)+1
c
ll=lct(5)
first=.true.
lunit=wte
top1=top
call icopy(6,lpt,1,lpt1,1)
lct4=lct(4)
c
m1=lpt(2)-lpt(1)
if(m1.lt.1) m1=1
c
if(macr.eq.0.and.rio.eq.rte) goto 1000
call whatln(lpt(1),lpt(2),lpt(6),nlc,l1,ifin)
m=ifin-l1+1
if(m.gt.ll) then
l1=max(l1,lpt(2)-ll/2)
m=min(ifin-l1,ll)
endif
m1=lpt(2)-l1
if(m.gt.0) then
call cvstr(m,lin(l1),buf,1)
call basout(io,lunit,buf(1:max(m,1)))
endif
1000 buf=' '
buf(m1+1:m1+9)=mg
call basout(io,lunit,buf(1:m1+9))
if(hio.gt.0) call basout(io,hio,buf(1:m1+9))
c depilement de l'environnement
lct(4)=2
p=pt+1
1501 p=p-1
if(p.eq.0) goto 1510
r=rstk(p)
goto(1502,1502,1504) r-500
goto 1501
c
c on depile une function
1502 k=lpt1(1)-(13+nsiz)
lpt1(1)=lin(k+1)
lpt1(2)=lin(k+2)
lpt1(6)=k
c
c recherche du nom de la function correspondant a ce niveau
lk=sadr(lin(k+6))
if(lk.le.lstk(top1+1)) then
km=0
else
km=lin(k+5)-1
endif
1503 km=km+1
if(km.gt.isiz)goto 1513
if(lstk(km).ne.lk) goto 1503
c
1513 continue
ilk=lin(k+6)
if(istk(ilk).ne.10) then
if(first) then
buf='at line '
m=11
first=.false.
nlc=0
else
buf='line '
m=6
call whatln(lpt1(1),lpt1(2),lpt1(6),nlc,l1,ifin)
endif
write(buf(m+1:m+5),'(i4)') lct(8)-nlc
m=m+4
buf(m+1:m+18)=' of function '
m=m+13
if (km.le.isiz) call cvname(idstk(1,km),buf(m+1:m+nlgh),1)
m=m+nlgh
else
buf='in execstr instruction'
m=26
endif
buf(m+1:m+14)=' called by :'
m=m+14
call basout(io,lunit,buf(1:m))
if(hio.gt.0) call basout(io,hio,buf(1:m))
lct(8)=lin(k+12+nsiz)
c
call whatln(lpt1(1),lpt1(2),lpt1(6),nlc,l1,ifin)
m=ifin-l1+1
if(m.gt.ll) then
l1=max(l1,lpt1(2)-ll/2)
m=min(ifin-l1,ll)
endif
if(l1.gt.0.and.m.gt.0.and.m+l1-1.le.lsiz) then
call cvstr(m,lin(l1),buf(1:m),1)
call basout(io,lunit,buf(1:m))
if(hio.gt.0) call basout(io,hio,buf(1:m))
endif
c
goto 1501
c
c on depile un exec ou une pause
1504 if(rio.ne.rte) then
c exec
k=lpt1(1)-(13+nsiz)
lpt1(1)=lin(k+1)
lpt1(2)=lin(k+4)
lpt1(6)=k
c
if(first) then
buf='at line '
m=11
first=.false.
nlc=0
else
buf='line '
m=6
endif
write(buf(m+1:m+5),'(i4)') lct(8)-nlc
m=m+4
buf(m+1:m+29)=' of exec file called by :'
m=m+29
call basout(io,lunit,buf(1:m))
if(hio.gt.0) call basout(io,hio,buf(1:m))
lct(8)=lin(k+12+nsiz)
c
call whatln(lpt1(1),lpt1(2),lpt1(6),nlc,l1,ifin)
m=ifin-l1+1
if(m.gt.ll) then
l1=max(l1,lpt1(2)-ll/2)
m=min(ifin-l1,ll)
endif
call cvstr(m,lin(l1),buf,1)
call basout(io,lunit,buf(1:m))
if(hio.gt.0) call basout(io,hio,buf(1:m))
1505 p=p-1
if(rstk(p).ne.902) goto 1505
goto 1501
else
c pause
top1=ids(2,p-1)
goto 1510
endif
c
1510 continue
call basout(io,lunit,' ')
if(hio.gt.0) call basout(io,hio,' ')
lct(4)=lct4
c
return
end
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