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|
subroutine fact
c ======================================================================
c analyseur de facteurs
c ======================================================================
c
c Copyright INRIA
include '../stack.h'
c
parameter (nz1=nsiz-1,nz2=nsiz-2)
logical eqid,eptover
integer semi,eol,blank,r,excnt,lparen,rparen,num,name
integer id(nsiz),eye(nsiz),rand(nsiz),ones(nsiz),op,fun1
integer star,dstar,comma,quote,cconc,extrac,rconc
integer left,right,hat,dot,equal
logical recurs,compil
integer setgetmode
data star/47/,dstar/62/,semi/43/,eol/99/,blank/40/
data num/0/,name/1/,comma/52/,lparen/41/,rparen/42/
data quote/53/,left/54/,right/55/,cconc/1/,extrac/3/,rconc/4/
data hat/62/,dot/51/,equal/50/
c
data eye/672014862,nz1*673720360/
data rand/219613723,nz1*673720360/
data ones/470685464,nz1*673720360/
c
c
r = rstk(pt)
c
if (ddt .eq. 4) then
write(buf(1:12),'(3i4)') pt,r,sym
call basout(io,wte,' factor pt:'//buf(1:4)//' rstk(pt):'//
& buf(5:8)//' sym:'//buf(9:12))
endif
c
ir=r/100
if(ir.ne.3) goto 01
goto(25,26,99,29,99,51,43,48,55,62,65,66,41),r-300
goto 99
c
01 if (sym.eq.left) go to 20
if (sym.eq.quote) go to 15
if (sym.eq.num) go to 10
excnt = 0
if (sym .eq. name) go to 30
id(1) = blank
if (sym .eq. lparen) go to 36
if(err1.gt.0) then
pt=pt+1
02 pt=pt-1
r=rstk(pt)
if(int(r/100).ne.3) goto 02
goto(25,26,99,29,99,51,43,48,55,62,65,66),r-300
endif
call error(2)
c if (err .gt. 0) return
return
c
c put something on the stack
c --- single number, getsym stored it in stk(vsiz)
c
10 call getnum
if(err.gt.0) return
call getsym
go to 60
c
c --- string
c
15 call getstr
if(err.gt.0) return
call getsym
go to 60
c
c --- matrix defined by bracket operators
c
20 if(char1.eq.right) then
c create an empty matrix
call getsym
call defmat
if(err.gt.0) return
call getsym
goto 60
endif
201 if(char1.eq.eol.or.char1.eq.semi) then
call getsym
if(sym.eq.eol) then
if(lpt(4).eq.lpt(6)) then
if(comp(1).ne.0) call seteol
call getlin(0)
else
lpt(4)=lpt(4)+1
call getsym
endif
endif
if(char1.eq.right) then
c create an empty matrix
call getsym
call defmat
if(err.gt.0) return
call getsym
goto 60
endif
goto 201
endif
if (eptover(0,psiz-3)) return
pt=pt+1
rstk(pt)=0
pstk(pt)=0
c
21 continue
pt=pt+1
pstk(pt)=0
call getsym
c
22 if (sym.eq.semi .or. sym.eq.eol .or.sym.eq.right) go to 27
if (sym .eq. comma) call getsym
rstk(pt) = 301
c get next entry or block
icall=1
c *call* expr
return
c catenate entry or block with previous on the same row
25 continue
if(err1.ne.0) goto 22
pstk(pt)=pstk(pt)+1
if(pstk(pt).le.1) goto 22
pstk(pt)=1
rstk(pt)= 302
fin=cconc
rhs=2
icall=4
c *call* allops(cconc)
return
26 go to 22
27 pt=pt-1
if (sym.eq.semi .and. char1.eq.eol) call getsym
c catenate row with previous rows
if(err1.ne.0) goto 29
if(pstk(pt+1).gt.0) pstk(pt)=pstk(pt)+1
if(pstk(pt).le.1) goto 29
pstk(pt)=1
rstk(pt)= 304
fin=rconc
rhs=2
icall=4
c *call* allops(rconc)
return
29 if (sym .eq. eol) then
if(lpt(4).eq.lpt(6)) then
if(comp(1).ne.0) call seteol
call getlin(0)
else
lpt(4)=lpt(4)+1
call getsym
endif
endif
if (sym.eq.eol.and.err1.ne.0) then
pt=pt-1
go to 60
endif
if (sym .ne. right) go to 21
pt=pt-1
call getsym
go to 60
c
c --- named variable, function evaluation or matrix element x(...)
c
30 call putid(id,syn(1))
call getsym
if (sym .eq. lparen) then
c . check for blank separator in matrix definition
if(abs(lin(lpt(3)-2)).ne.blank.or.rstk(pt-2).ne.301) then
c . it is really x(....)
goto 36
endif
endif
fin=0
rhs = 0
c
if(comp(1).eq.0) then
c -- put a named variable in the stack
c check for indirect loading
fin=setgetmode(id)
call stackg(id)
if (err .gt. 0) return
if(fin.ne.0.or.err1.ne.0) goto 60
endif
c
c -- check for eye, rand ones function special call
fun1=fun
call funs(id)
if(err.gt.0) return
if(fun.eq.6.and.(fin.eq.14.or.fin.eq.13.or.fin.eq.15)) goto 53
if (fun .gt. 0) then
call putid(ids(1,pt+1),id)
call error(25)
if (err .gt. 0) return
endif
c this should never happen???
if (eqid(id,eye).or.eqid(id,rand)) then
call funs(id)
goto 53
endif
fun=fun1
c fin=0
fin=setgetmode(id)
call stackg(id)
if (err .gt. 0) return
if (fin .eq. 0) then
if(err1.ne.0) goto 60
call putid(ids(1,pt+1),id)
call error(4)
if (err .gt. 0) return
endif
go to 60
c
36 continue
c --- function evaluation or matrix element x(...)
if ( eptover(1,psiz-1)) return
c x(...) :store object or function name
rstk(pt)=0
pstk(pt)=lhs
call putid(ids(1,pt),id)
c modif ss
fun1=fun
fun=0
if(id(1).ne.blank) then
fin=-2
call funs(id)
if (fun .ne. 0) then
c name is a function name check if it is a call or a reference
else
c . allow indirect reference to variables
fun=-1
endif
endif
if(id(1).ne.blank) lhs=1
c
c eval function or variable arguments
38 call getsym
c
if(sym.eq.rparen) then
c . function has no input parameter
excnt=-1
goto 45
endif
c
fun1=fun
if(sym.eq.name.and.char1.eq.lparen) then
c . check for a function name
fun=0
fin=-2
call funs(syn)
if (fun .ne. 0) then
c name is a function name check if it is a call or a reference
else
fun=fun1
endif
endif
excnt = excnt+1
if(char1.ne.equal) goto 42
c next lines to manage named arguments (..,a=..)
fun=fun1
lpt4=lpt(4)
call getch
if(char1.eq.equal) then
c check for a==
lpt(4)=lpt4
goto 42
endif
if ( eptover(1,psiz-1)) return
ids(1,pt)=rhs
ids(2,pt)=lhs
ids(3,pt)=lct(4)
ids(4,pt)=fun
lct(4)=-1
rstk(pt)=313
lpt(4)=lpt(2)
pstk(pt)=excnt
char1=blank
icall=7
return
c *call* parse
41 continue
rhs=ids(1,pt)
lhs=ids(2,pt)
lct(4)=ids(3,pt)
excnt = pstk(pt)
fun=ids(4,pt)
pt = pt-1
c end of special code to manage named argument
goto 44
c
42 continue
c argument is a standard expression
if ( eptover(1,psiz-1)) return
pstk(pt) = excnt
ids(1,pt)=fun
ids(2,pt)=fun1
rstk(pt) = 307
icall=1
c *call* expr
return
43 excnt = pstk(pt)
fun=ids(2,pt)
pt = pt-1
c
44 continue
c one more argument ?
if (sym .eq. comma) go to 38
c end of argument sequence or recursive extraction ?
if (sym .ne. rparen) then
call error(3)
c if (err .gt. 0) return
return
endif
c
45 continue
c end of argument sequence or recursive extraction
recurs=.false.
call getsym
if(sym.eq.lparen) then
c . check for blank separator in matrix definition
if(abs(lin(lpt(3)-2)).eq.blank.and.rstk(pt-3).eq.301) then
c . end of argument sequence
goto 46
endif
c . recursive extraction
if(excnt.gt.1) then
c call error(3)
c return
if(comp(1).eq.0) then
c . form list with individual indexes
call mkindx(0,excnt)
if(err.gt.0) return
else
if (compil(19,0,excnt,0,0)) then
if (err.gt.0) return
endif
endif
excnt=1
recurs=.true.
endif
rstk(pt)=rstk(pt)-1
excnt=0
c . get one more argument of the recursive extraction
goto 38
elseif(rstk(pt).lt.0) then
c . all args of the recursive extraction have been computed
c . store them into a list
if(comp(1).eq.0) then
c . form list with individual indexes
call mkindx(1-rstk(pt),excnt)
if(err.gt.0) return
excnt=1
recurs=.true.
else
if (compil(19,1-rstk(pt),excnt,0,0)) then
if (err.gt.0) return
excnt=1
endif
endif
endif
46 continue
c all arguments evaluated
call putid(id,ids(1,pt))
lhs=pstk(pt)
pt=pt-1
if (id(1) .eq. blank) then
if(lhs.ne.excnt) then
call error(41)
if(err.gt.0) return
endif
if (recurs) then
call error(250)
return
endif
go to 60
endif
rhs = excnt
47 continue
c get function or variable to be evaluated for computed arguments
fin=0
if(comp(1).eq.0) then
fin=-2
call stackg(id)
if(err.gt.0) return
endif
if(fin.eq.0) then
c . id is not a standard variable
if (recurs) then
call error(250)
return
endif
if(err1.gt.0) goto 60
call funs(id)
if(err.gt.0) return
if(fun.gt.0) goto 53
fin=-2
call stackg(id)
if(err.gt.0) return
if(fin.eq.0) then
if(err1.gt.0) goto 60
call error(4)
if(err.gt.0) return
endif
endif
if(fin.gt.0) goto 50
if(rhs.eq.0) goto 60
c
c --- variable is a matrix or list :extraction
c
rhs=rhs+1
if ( eptover(1,psiz-1)) return
rstk(pt)=308
fin=extrac
icall=4
c *call* allops(extrac)
return
48 pt=pt-1
goto 60
c
c --- variable is macro : execution
c
50 if ( eptover(1,psiz-1)) return
call putid(id,ids(1,pt))
rstk(pt)=306
pstk(pt)=wmac
icall=5
c *call* macro
return
51 wmac=pstk(pt)
pt=pt-1
go to 60
c
c evaluate matrix function
53 if ( eptover(1,psiz-1)) return
rstk(pt) = 309
icall=9
c *call* matfns
return
55 pt = pt-1
go to 60
c
60 continue
c check for ', .' **, ^ and .^
if (sym .ne. quote) go to 63
i = lpt(3) - 2
if (abs(lin(i)) .eq. blank) go to 90
fin=quote
61 rhs=1
if ( eptover(1,psiz-1)) return
rstk(pt)=310
icall=4
c *call* allops(quote) or allops(dot+quote)
return
62 pt=pt-1
call getsym
63 if(sym.eq.hat) then
op=dstar
elseif(sym.eq.dot.and.char1.eq.hat) then
call getsym
op=dstar+dot
elseif(sym.eq.star.and.char1.eq.star) then
call getsym
op=dstar
elseif(sym.eq.dot.and.char1.eq.quote) then
call getsym
fin=dot+quote
goto 61
else
goto 90
endif
call getsym
if ( eptover(1,psiz-1)) return
rstk(pt) = 311
pstk(pt) = op
icall=3
c *call* factor
go to 01
65 rstk(pt)=312
fin=pstk(pt)
rhs=2
icall=4
c *call* allops(dstar)
return
66 pt=pt-1
goto 90
90 return
c
99 call error(22)
if (err .gt. 0) return
return
end
|
