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subroutine intreadb
c Copyright INRIA/ENPC
INCLUDE '../stack.h'
integer top2
integer mode(2)
logical opened
integer iadr,sadr
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
lw=lstk(top+1)
il=iadr(lstk(top))
if(lhs.ne.1) then
call error(42)
return
endif
iacces=0
mode(2)=0
if(rhs.eq.4) then
iacces=top
ilb=iadr(lstk(iacces))
if(istk(ilb+3).ne.0) then
err=top
call error(52)
return
endif
nb=istk(ilb+1)*istk(ilb+2)
lb=sadr(ilb+4)
top=top-1
rhs=rhs-1
mode(1)=-111
elseif(rhs.eq.3) then
mode(1)=-101
else
call error(39)
return
endif
c opening file
top2 = top
top = top-rhs+1
il=iadr(lstk(top))
call v2unit(top,mode,lunit,opened,ierr)
if(ierr.gt.0) return
c
if(lunit.eq.wte) then
call error(49)
goto 996
endif
c
il=iadr(lstk(top2))
if(istk(il).ne.1) then
err=3
call error(53)
goto 996
endif
if(istk(il+3).ne.0) then
err=3
call error(52)
return
endif
if(istk(il+1)*istk(il+2).ne.1) then
err=3
call error(89)
goto 996
endif
l=sadr(il+4)
n=int(stk(l))
c
top2=top2-1
il=iadr(lstk(top2))
if(istk(il).ne.1) then
err=2
call error(53)
goto 996
endif
if(istk(il+3).ne.0) then
err=2
call error(52)
goto 996
endif
if(istk(il+1)*istk(il+2).ne.1) then
err=2
call error(89)
goto 996
endif
l=sadr(il+4)
m=int(stk(l))
if(iacces.ne.0) then
if(m.ne.nb) then
call error(42)
goto 996
endif
endif
c
il=iadr(lstk(top))
if(m.eq.0.or.n.le.0) then
istk(il)=1
istk(il+1)=0
istk(il+2)=0
istk(il+3)=0
lstk(top+1)=sadr(il+4)
if(.not.opened) call clunit(-lunit,buf,mode)
goto 999
endif
l=sadr(il+4)
istk(il)=1
istk(il+1)=m
istk(il+2)=n
istk(il+3)=0
if(m.gt.0) then
lw=l+m*n
if(iacces.ne.0) then
ilb=iadr(lw)
lw=sadr(ilb+nb)
endif
err=lw-lstk(bot)
if(err.gt.0) then
call error(17)
goto 996
endif
endif
c
if(iacces.eq.0) then
c . sequential acces
if(m.gt.0) then
do 191 i=0,m-1
read(lunit,end=997,err=998) (stk(l+i+j*m),j=0,n-1)
191 continue
else
i=-1
192 i=i+1
li=l+n*i
err=li+n-lstk(bot)
if(err.gt.0) then
call error(17)
goto 996
endif
read(lunit,end=193,err=998) (stk(li+j),j=0,n-1)
goto 192
193 m=i
lstk(top+1)=l+m*n
err=lstk(top+1)+m*n-lstk(bot)
if(err.gt.0) then
call error(17)
goto 996
endif
l1=l+m*n
call unsfdcopy(m*n,stk(l),1,stk(l1),1)
call mtran(stk(l1),n,stk(l),m,n,m)
istk(il+1)=m
endif
else
c . direct access
call entier(nb,stk(lb),istk(ilb))
do 194 i=0,m-1
read(lunit,rec=istk(ilb+i),err=998)
$ (stk(l+i+j*m),j=0,n-1)
194 continue
endif
lstk(top+1)=l+m*n
if(.not.opened) call clunit(-lunit,buf,mode)
goto 999
996 if(.not.opened) call clunit(-lunit,buf,mode)
return
997 err=i
call error(62)
if(.not.opened) call clunit(-lunit,buf,mode)
return
998 call error(49)
if(.not.opened) call clunit(-lunit,buf,mode)
return
999 return
end
|
