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C
C keyparse.f: high-level interface to CCP4 parser functions
C Copyright (C) 1995 Dave Love, Kevin Cowtan
C
C This library is free software: you can redistribute it and/or
C modify it under the terms of the GNU Lesser General Public License
C version 3, modified in accordance with the provisions of the
C license to address the requirements of UK law.
C
C You should have received a copy of the modified GNU Lesser General
C Public License along with this library. If not, copies may be
C downloaded from http://www.ccp4.ac.uk/ccp4license.php
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU Lesser General Public License for more details.
C
C A simplified interface to the %$!$#@$ (so-called) parser:
C
C The idea is to call a routine (MEMOPARSE) to read a keyworded line
C into a hidden internal buffer and then have a simple chain of
C calls to a set of routines which check the appropriate keyword,
C look for any extra arguments associated with it, and set values in
C their arguments as appropriate. No if ... then ... else (or, much
C worse, assigned goto) is necessary, nor maintaining the parser
C arrays -- the relevant checking is done internally. At the end of
C the checks, call PARSEDIAGNOSE to print any appropriate messages
C and loop back to MEMOPARSE if PARSEDIAGNOSE's argument is true
C (otherwise continue and process the data read in). You don't need
C to check for `END' or end-of-file. Geddit?
C
C Escape hatch: use PARSEKEYARG to get all the tokens after a random
C keyword and call PARSE (or whatever) to deal with them as
C necessary. This is usually deprecated, however -- go for
C simply-structured input.
C
C 10 call memoparse (.true.) ! setup and echo i/p
C call parseint ('IVAL', ival) ! ival.eq.3 after `IVAL 3'
C call parsecell (cell) ! assign cell from `CELL 20 30 40' etc.
C call parsekeyarg ('FRED', rest) ! the full horror in REST
C call parse (rest, ....)
C [firkle with the `parse'd arrays]
C ...
C call parsediagnose (cont) ! check
C if (cont) goto 10
C c now do something useful...
C
C Fixme: the set of routines below might need extending...
C Fixme: consider whether more obscure names worthwhile to avoid
C possible clashes.
C
C Dave Love $Date: 2008-06-09 10:41:02 $
C Additions by Kevin Cowtan
C
subroutine memoparse (echo)
C
C Call PARSER and stash the returned values away for later testing
C when the other entrypoints are called. (OK, so it's not really
C memoisation...).
C
C ECHO is set to echo the parser i/p.
implicit none
C Args
character*(*) key, subkey, spgnam, pgname, rest
character*30 prglab(*)
character*1 chnam
logical echo, flag, cont
integer ival, nsym, numsgp, nsymp, n, ivals (n), nth, mtznum,
+ nprglab, toks, inat0, inat1, ires0, ires1, imode, ifail
real rval, cell (6), rsym (4,4,*), resmin, resmax, smin, smax,
+ rvals(n)
C Stores for parser stuff
integer maxtoks, maxline
C Let's not mess around...
parameter (maxtoks = 500, maxline=2000)
integer ibeg(maxtoks), iend(maxtoks), ityp(maxtoks), idec(maxtoks)
real fvalue (maxtoks)
character*4 cvalue (maxtoks), memokey, memosubkey
character line*(maxline)
integer ntok
C locals
logical someerr, eof, argerr, success(maxtoks)
integer i, k
save
data someerr, eof /2*.false./
ntok=maxtoks
argerr = .false.
line = ' '
C in case of immediate EOF:
success(1) = .true.
call parser(memokey, line, ibeg, iend, ityp, fvalue, cvalue, idec,
+ ntok, eof, echo)
C END == EOF always
if (memokey.eq.'END') eof = .true.
C not sure if necessary:
if (eof) memokey = ' '
do i=1,ntok
success(i) = .false.
enddo
return
entry parsekey (key, flag)
C bare KEY -- set FLAG if found
if (memokey.eq.key) then
C matched key
if (ntok.eq.1) then
success(1) = .true.
flag = .true.
else
argerr = .true.
call lerror (1, 0, 'No argument expected')
end if
end if
return
entry parsekeyarg (key, rest)
C KEY + rest of line -- rest of line returned in REST
if (memokey.eq.key) then
C matched key
if (ntok.gt.1) then
do i=1,ntok
success(i) = .true.
enddo
rest = line (ibeg(2):iend(ntok))
else
rest = ' '
success(1) = .true.
C argerr = .true.
C call lerror (1, 0, 'Argument expected')
end if
end if
return
entry parseint (key, ival)
C KEY + integer -- returned in IVAL
if (memokey.eq.key) then
C matched key
if (ntok.eq.2 .and. ityp (2).eq.2) then
ival = nint (fvalue(2))
do i=1,2
success(i) = .true.
enddo
else
argerr = .true.
call lerror (1, 0, 'Integer argument expected')
end if
end if
return
entry parsereal (key, rval)
C KEY + real -- returned in RVAL
if (memokey.eq.key) then
C matched key
if (ntok.eq.2 .and. ityp (2).eq.2) then
rval = fvalue(2)
do i=1,2
success(i) = .true.
enddo
else
argerr = .true.
call lerror (1, 0, 'Real argument expected')
end if
end if
return
entry parsenargs(key, toks)
toks = 0
if (memokey .eq. key) toks = ntok
return
entry parsenints (key, n, ivals)
C KEY + upto N integers -- N reset to number found, returned in IVALS
if (memokey.eq.key) then
success(1)=.true.
if (ntok.ge.2 .and. ntok.le. n+1) then
do i = 1, min (n, ntok-1)
if (ityp (i+1).ne.2) return
ivals (i) = nint (fvalue (i+1))
n = i
success(i+1) = .true.
end do
else
argerr = .true.
n = ntok
call lerror (1, 0, 'Incorrect number of integer arguments')
end if
end if
return
entry parsenreals (key, n, rvals)
C KEY + upto N reals -- N reset to number found, returned in RVALS
if (memokey.eq.key) then
success(1)=.true.
if (ntok.ge.2 .and. ntok.le. n+1) then
do i = 1, min (n, ntok-1)
if (ityp (i+1).ne.2) return
rvals (i) = fvalue (i+1)
n = i
success(i+1) = .true.
end do
else
argerr = .true.
n = ntok
call lerror (1, 0, 'Incorrect number of real arguments')
end if
end if
return
entry parsesubkey (key, subkey, flag)
C KEY + subkeyword SUB -- set FLAG if found
if (memokey.eq.key) then
C matched key
success(1) = .true.
if (subkey.ne.' ') then
do k=2,ntok
memosubkey=cvalue(k)
call ccpupc(memosubkey)
if (memosubkey.eq.subkey) then
flag=.true.
success(k)=.true.
endif
enddo
else
flag=.true.
end if
end if
return
entry parsesubkeyarg (key, subkey, nth, rest)
C KEY + subkey + rest of line -- rest of line returned in REST
if (memokey.eq.key) then
C matched key
success(1) = .true.
k = 1
if (subkey .ne. ' ') then
k = 9999
do i=2,ntok
memosubkey=cvalue(i)
call ccpupc(memosubkey)
if (memosubkey.eq.subkey) then
k = i
goto 90
endif
enddo
endif
90 if (k.le.ntok) then
if (ntok.ge.k+nth) then
rest = line (ibeg(k+nth):iend(ntok))
do i=2,ntok
success(i) = .true.
enddo
else
argerr = .true.
call lerror (1, 0, 'Argument expected after sub-keyword')
end if
end if
end if
return
entry parsesubint (key, subkey, nth, flag, ival)
C KEY + n'th integer after subkey -- returned in IVAL
C ERROR only if flag=true
if (memokey.eq.key) then
C ... matched key
success(1) = .true.
k=1
if (subkey.ne.' ') then
k=9999
do i=2,ntok
memosubkey=cvalue(i)
call ccpupc(memosubkey)
if (memosubkey.eq.subkey) then
k=i
goto 100
endif
enddo
endif
100 if (k.le.ntok) then
C .... matched subkey (if set)
success(k) = .true.
if (ntok.ge.nth+k .and. ityp(nth+k).eq.2) then
ival = nint (fvalue(nth+k))
success(nth+k) = .true.
else if (flag) then
argerr = .true.
call lerror (1, 0, 'Integer sub-argument expected')
endif
endif
endif
return
entry parsesubreal (key, subkey, nth, flag, rval)
C KEY + n'th real after subkey -- returned in RVAL
C ERROR only if flag=true
if (memokey.eq.key) then
C ... matched key
success(1) = .true.
k=1
if (subkey.ne.' ') then
k=9999
do i=2,ntok
memosubkey=cvalue(i)
call ccpupc(memosubkey)
if (memosubkey.eq.subkey) then
k=i
goto 110
endif
end do
endif
110 if (k.le.ntok) then
C .... matched subkey (if set)
success(k) = .true.
if (ntok.ge.nth+k .and. ityp(nth+k).eq.2) then
rval = fvalue(nth+k)
success(nth+k) = .true.
else if (flag) then
argerr = .true.
call lerror (1, 0, 'Real sub-argument expected')
endif
endif
endif
return
entry parsesubchar (key, subkey, nth, flag, rest)
C KEY + n'th string after subkey -- returned in REST
if (memokey.eq.key) then
C ... matched key
success(1) = .true.
k=1
if (subkey.ne.' ') then
k=9999
do i=2,ntok
memosubkey=cvalue(i)
call ccpupc(memosubkey)
if (memosubkey.eq.subkey) then
k=i
goto 120
endif
end do
endif
120 if (k.le.ntok) then
C .... matched subkey (if set)
success(k) = .true.
if (ntok.ge.nth+k .and. (ityp(nth+k).ne.0 .or. .not.flag) ) then
rest = line(ibeg(nth+k):iend(nth+k))
success(nth+k) = .true.
else if (flag) then
argerr = .true.
call lerror (1, 0, 'Character sub-argument expected')
endif
endif
endif
return
entry parsecell (cell)
C CELL -- returned in CELL
if (memokey.eq.'CELL') then
call rdcell (2, ityp, fvalue, ntok, cell)
do i=1,ntok
success(i) = .true.
enddo
end if
return
entry parsesymm (spgnam, numsgp, pgname, nsym, nsymp, rsym)
C SYMMetry -- usual values returned
if (memokey.eq.'SYMM') then
nsym = 0
call rdsymm(2, line, ibeg, iend, ityp, fvalue, ntok, spgnam,
+ numsgp, pgname, nsym, nsymp, rsym)
do i=1,ntok
success(i) = .true.
enddo
end if
return
entry parseatomselect(key, inat0, inat1, ires0, ires1, chnam,
+ imode)
C KEYword followed by atom/residue selection syntax
C key atom <ai> [[to] <aj>] |
C residue [all|ons|ca] [chain <chn>] <ri> [[to] <rj>]
C Returns values of <ai>,<aj>,imode...
if (memokey.eq.key) then
C matched key
ifail = -1
call rdatomselect(2, inat0, inat1, ires0, ires1, chnam, imode,
+ ntok, line, ibeg, iend, ityp, idec, fvalue,
+ ifail)
do i=1,ntok
if (i.ne.ifail) success(i)=.true.
enddo
endif
return
entry parsereso (resmin, resmax, smin, smax)
C RESOlution -- usual values returned
if (memokey.eq.'RESO') then
call rdreso (2, ityp, fvalue, ntok, resmin, resmax, smin, smax)
do i=1,ntok
success(i) = .true.
enddo
end if
return
entry parselabin(mtznum,prglab,nprglab)
C LABIn -- requires mtz file number, program labels, and number of.
if (memokey.eq.'LABI') then
call lkyin(mtznum,prglab,nprglab,ntok,line,ibeg,iend)
do i=1,ntok
success(i) = .true.
enddo
end if
return
entry parselabout(mtznum,prglab,nprglab)
C LABOut -- requires mtz file number, program labels, and number of.
if (memokey.eq.'LABO') then
call lkyout(mtznum,prglab,nprglab,ntok,line,ibeg,iend)
do i=1,ntok
success(i) = .true.
enddo
end if
return
entry parsefail()
do i=1,ntok
success(i) = .false.
enddo
return
entry parseend(key)
C KEY -- is treated as input terminator as same as END
if (memokey .eq. key) eof = .true.
return
entry parsediagnose (cont)
C Call at end of tests for possible 'Invalid keyword' diagnostic or
C abort if at EOF and had an error. Continue processing (no EOF)
C if (cont).
if (.not.argerr .and. .not.eof) then
if (.not.success(1)) then
call lerror (1, 0, 'Invalid keyword')
someerr = .true.
endif
do i=2,ntok
if (.not.success(i)) then
write (line,950)i
950 format ('Invalid sub-keyword in position ',i2)
call lerror (1, 0, line)
someerr = .true.
endif
enddo
endif
if (argerr) then
someerr = .true.
end if
argerr = .false.
if (eof) then
cont = .false.
if(someerr) call ccperr (1, 'Input error (see above)')
else
cont = .true.
end if
do i=1,ntok
success(i) = .false.
enddo
return
C
end
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