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|
subroutine parse
common /cdefio/ bp, buf (4096)
integer bp
integer buf
common /cfname/ fcname (30)
integer fcname
common /cfor/ fordep, forstk (200)
integer fordep
integer forstk
common /cgoto/ xfer
integer xfer
common /clabel/ label, retlab, memflg, col, logic0
integer label
integer retlab
integer memflg
integer col
integer logic0
common /cline/ dbgout, dbglev, level, linect (5), infile (5), fnam
*p, fnames ( 150)
integer dbgout
integer dbglev
integer level
integer linect
integer infile
integer fnamp
integer fnames
common /cmacro/ cp, ep, evalst (500), deftbl
integer cp
integer ep
integer evalst
integer deftbl
common /coutln/ outp, outbuf (74)
integer outp
integer outbuf
common /csbuf/ sbp, sbuf(2048), smem(240)
integer sbp
integer sbuf
integer smem
common /cswtch/ swtop, swlast, swstak(1000), swvnum, swvlev, swvst
*k(10), swinrg
integer swtop
integer swlast
integer swstak
integer swvnum
integer swvlev
integer swvstk
integer swinrg
common /ckword/ rkwtbl
integer rkwtbl
common /clname/ fkwtbl, namtbl, gentbl, errtbl, xpptbl
integer fkwtbl
integer namtbl
integer gentbl
integer errtbl
integer xpptbl
common /erchek/ ername, body, esp, errstk(30)
integer ername
integer body
integer esp
integer errstk
integer mem( 60000)
common/cdsmem/mem
integer lexstr(100)
integer lab, labval(100), lextyp(100), sp, token, i, t
integer lex
logical pushs0
sp = 1
lextyp(1) = -1
token = lex(lexstr)
23000 if (.not.(token .ne. -1))goto 23002
pushs0 = .false.
I23003=(token)
goto 23003
23005 continue
call ifcode (lab)
pushs0 = .true.
goto 23004
23006 continue
call iferrc (lab, 1)
pushs0 = .true.
goto 23004
23007 continue
call iferrc (lab, 0)
pushs0 = .true.
goto 23004
23008 continue
call docode (lab)
pushs0 = .true.
goto 23004
23009 continue
call whilec (lab)
pushs0 = .true.
goto 23004
23010 continue
call forcod (lab)
pushs0 = .true.
goto 23004
23011 continue
call repcod (lab)
pushs0 = .true.
goto 23004
23012 continue
call swcode (lab)
pushs0 = .true.
goto 23004
23013 continue
i=sp
23014 if (.not.(i .gt. 0))goto 23016
if (.not.(lextyp(i) .eq. -92))goto 23017
goto 23016
23017 continue
23015 i=i-1
goto 23014
23016 continue
if (.not.(i .eq. 0))goto 23019
call synerr (24Hillegal case or default.)
goto 23020
23019 continue
call cascod (labval (i), token)
23020 continue
goto 23004
23021 continue
call labelc (lexstr)
pushs0 = .true.
goto 23004
23022 continue
t = lextyp(sp)
if (.not.(t .eq. -99 .or. t .eq. -98 .or. t .eq. -97))goto 23023
call elseif (labval(sp))
goto 23024
23023 continue
call synerr (13HIllegal else.)
23024 continue
t = lex (lexstr)
call pbstr (lexstr)
if (.not.(t .eq. -99 .or. t .eq. -98 .or. t .eq. -97))goto 23025
call indent (-1)
token = -72
23025 continue
pushs0 = .true.
goto 23004
23027 continue
if (.not.(lextyp(sp) .eq. -98 .or. lextyp(sp) .eq. -97))goto 23028
call thenco (lextyp(sp), labval(sp))
lab = labval(sp)
token = lextyp(sp)
sp = sp - 1
goto 23029
23028 continue
call synerr (41HIllegal 'then' clause in iferr statement.)
23029 continue
pushs0 = .true.
goto 23004
23030 continue
call litral
goto 23004
23031 continue
call errchk
goto 23004
23032 continue
call beginc
goto 23004
23033 continue
call endcod (lexstr)
if (.not.(sp .ne. 1))goto 23034
call synerr (31HMissing right brace or 'begin'.)
sp = 1
23034 continue
goto 23004
23036 continue
if (.not.(token .eq. 123))goto 23037
pushs0 = .true.
goto 23038
23037 continue
if (.not.(token .eq. -67))goto 23039
call declco (lexstr)
23039 continue
23038 continue
goto 23004
23003 continue
I23003=I23003+100
if (I23003.lt.1.or.I23003.gt.18)goto 23036
goto (23005,23006,23007,23008,23009,23010,23011,23012,23013,23013,
*23021,23036,23022,23027,23030,23031,23032,23033),I23003
23004 continue
if (.not.(pushs0))goto 23041
if (.not.(body .eq. 0))goto 23043
call synerr (24HMissing 'begin' keyword.)
call beginc
23043 continue
sp = sp + 1
if (.not.(sp .gt. 100))goto 23045
call baderr (25HStack overflow in parser.)
23045 continue
lextyp(sp) = token
labval(sp) = lab
goto 23042
23041 continue
if (.not.(token .ne. -91 .and. token .ne. -90))goto 23047
if (.not.(token .eq. 125))goto 23049
token = -74
23049 continue
I23051=(token)
goto 23051
23053 continue
call otherc (lexstr)
goto 23052
23054 continue
call brknxt (sp, lextyp, labval, token)
goto 23052
23055 continue
call retcod
goto 23052
23056 continue
call gocode
goto 23052
23057 continue
if (.not.(body .eq. 0))goto 23058
call strdcl
goto 23059
23058 continue
call otherc (lexstr)
23059 continue
goto 23052
23060 continue
if (.not.(lextyp(sp) .eq. 123))goto 23061
sp = sp - 1
goto 23062
23061 continue
if (.not.(lextyp(sp) .eq. -92))goto 23063
call swend (labval(sp))
sp = sp - 1
goto 23064
23063 continue
call synerr (20HIllegal right brace.)
23064 continue
23062 continue
goto 23052
23051 continue
I23051=I23051+81
if (I23051.lt.1.or.I23051.gt.7)goto 23052
goto (23053,23054,23054,23055,23056,23057,23060),I23051
23052 continue
token = lex (lexstr)
call pbstr (lexstr)
call unstak (sp, lextyp, labval, token)
23047 continue
23042 continue
23001 token = lex(lexstr)
goto 23000
23002 continue
if (.not.(sp .ne. 1))goto 23065
call synerr (15Hunexpected EOF.)
23065 continue
end
c pushs0 push_stack
c logic0 logical_column
|
