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subroutine intexec
c interface of exec function
c Copyright INRIA/ENPC
INCLUDE '../stack.h'
c
integer flag,semi,typ
integer mode(2),retu(6)
logical opened
integer iadr,sadr
c
save opened,lunit
c
data semi/43/
data retu/27,14,29,30,27,23/
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
if (ddt .eq. 4) then
write(buf(1:4),'(i4)') fin
call basout(io,wte,' matio '//buf(1:4))
endif
c
if(int(rstk(pt)/100).ne.9) goto 01
if(rstk(pt).eq.902) goto 12
if(rstk(pt).eq.909) goto 16
01 lw=lstk(top+1)
if(rhs.gt.3.or.rhs.lt.1) then
call error(42)
return
endif
if(lhs.gt.1) then
call error(41)
return
endif
c options handling
c---------------------
c default options values
flag = 3
if (sym .eq. semi) flag = 0
icheck=0
c
if(rhs.gt.1) then
c . specified options
do 11 ir=2,rhs
ilopt=iadr(lstk(top))
if(istk(ilopt).lt.0) ilopt=iadr(istk(ilopt+1))
if(istk(ilopt).eq.1) then
c . mode given
flag = int(stk(sadr(ilopt+4)))
elseif(istk(ilopt).eq.10) then
c . error control
icheck=1
else
call error(44)
return
endif
top=top-1
11 continue
endif
if(flag.ge.4) then
call basout(io,wte,
$ 'step-by-step mode: enter carriage return to proceed')
endif
il=iadr(lstk(top))
typ=abs(istk(il))
if(typ.eq.1.or.typ.eq.10) then
c . exec of a file , opening file
call v2cunit(top,'rb',lunit,opened,ierr)
if(ierr.gt.0) return
top=top-1
typ=1
elseif(typ.eq.11.or.typ.eq.13) then
c . exec of a function
typ=0
else
err=1
call error(44)
return
endif
c
pt=pt+1
c preserve current error recovery modes
ids(2,pt)=errct
ids(3,pt)=err2
ids(4,pt)=err1
ids(5,pt)=errpt
c set error recovery modes
if(icheck.eq.0) then
ids(1,pt)=0
else
c ids(1,pt)=1+toperr
c toperr=top
ids(1,pt)=1+top
errpt=pt
imode=1
imess=1
num=-1
errct=(8*imess+imode)*100000+abs(num)
if(num.lt.0) errct=-errct
endif
if(typ.eq.0) goto 15
c exec of a file
c ---------------
pstk(pt)=rio
rio = lunit
rstk(pt)=902
ids(6,pt)=0
if(opened) ids(6,pt)=1
icall=5
fin=flag
c *call* macro
go to 999
12 continue
opened=ids(6,pt).eq.1
if(.not.opened) call clunit(-rio,buf,mode)
rio=pstk(pt)
top=top+1
lhs=1
if(ids(1,pt).gt.0) then
c return error number
top=ids(1,pt)
il=iadr(lstk(top))
istk(il)=1
istk(il+1)=1
istk(il+2)=1
istk(il+3)=0
l=sadr(il+4)
stk(l)=max(err1,err2)
lstk(top+1)=l+1
fun=0
err1=0
err2=0
c toperr=ids(1,pt)-1
else
il=iadr(lstk(top))
istk(il)=0
lstk(top+1)=lstk(top)+1
err2=max(ids(3,pt),err2)
err1=max(ids(4,pt),err1)
endif
c restore error recovery modes
errct=ids(2,pt)
errpt=ids(5,pt)
pt=pt-1
goto 999
c exec of a function
c ------------------
15 continue
fin=lstk(top)
pstk(pt)=flag
rstk(pt)=909
icall=5
c *call* macro
go to 999
16 lhs=1
17 if(ids(1,pt).gt.0) then
c return error number
top=ids(1,pt)-1
il=iadr(lstk(top))
istk(il)=1
istk(il+1)=1
istk(il+2)=1
istk(il+3)=0
l=sadr(il+4)
stk(l)=max(err1,err2)
lstk(top+1)=l+1
fun=0
c toperr=ids(1,pt)-1
else
il=iadr(lstk(top))
istk(il)=0
lstk(top+1)=lstk(top)+1
endif
c restore error recovery modes
errct=ids(2,pt)
err2=ids(3,pt)
err1=ids(4,pt)
errpt=ids(5,pt)
pt=pt-1
goto 999
c
999 return
end
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