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C--------------------------------------------------------------------------
subroutine ftgbcl(iunit,colnum,xtype,xunit,dtype,rcount,
& xscal,xzero,xnull,xdisp,status)
C Get information about a Binary table CoLumn
C returns the parameters which define the column
C iunit i Fortran i/o unit number
C colnum i number of the column (first column = 1)
C xtype c name of the column
C xunit c physical units of the column
C dtype c datatype of the column
C rcount i repeat count of the column
C xscal d scaling factor for the column values
C xzero d scaling zero point for the column values
C xnull i value used to represent undefined values in integer column
C xdisp c display format for the column
C status i returned error status
integer iunit,colnum,rcount,xnull,status
double precision xscal,xzero
character*(*) xtype,xunit,dtype,xdisp
C COMMON BLOCK DEFINITIONS:--------------------------------------------
integer nf,nb,ne
parameter (nb = 20)
parameter (nf = 3000)
parameter (ne = 200)
integer bufnum,chdu,hdutyp,maxhdu,hdstrt,hdend,nxthdr,dtstrt
integer nxtfld
logical wrmode
common/ft0001/bufnum(199),chdu(nb),hdutyp(nb),maxhdu(nb),
& wrmode(nb),hdstrt(nb,ne),hdend(nb),nxthdr(nb),dtstrt(nb),nxtfld
integer tfield,tstart,tbcol,rowlen,tdtype,trept,tnull,scount
integer theap,nxheap
double precision tscale,tzero
common/ft0002/tfield(nb),tstart(nb),tbcol(nf),rowlen(nb),
& tdtype(nf),trept(nf),tscale(nf),tzero(nf),tnull(nf),scount(nb)
& ,theap(nb),nxheap(nb)
C END OF COMMON BLOCK DEFINITIONS------------------------------------
integer ibuff,nfound,tcode
logical descrp
character ctemp*2,fwide*4
if (status .gt. 0)return
if (colnum .lt. 1 .or. colnum .gt. 999)then
C illegal column number
status=302
return
end if
ibuff=bufnum(iunit)
C get the parameters which are stored in the common block
rcount=trept(colnum+tstart(ibuff))
xscal=tscale(colnum+tstart(ibuff))
xzero=tzero(colnum+tstart(ibuff))
xnull=tnull(colnum+tstart(ibuff))
C translate the numeric data type code
dtype=' '
tcode=tdtype(colnum+tstart(ibuff))
if (tcode .lt. 0)then
descrp=.true.
tcode=-tcode
else
descrp=.false.
end if
if (tcode .eq. 21)then
dtype='I'
else if (tcode .eq. 41)then
dtype='J'
else if (tcode .eq. 42)then
dtype='E'
else if (tcode .eq. 82)then
dtype='D'
else if (tcode .eq. 16)then
C this is an ASCII field; width of field is stored in TNULL
write(fwide,1000)tnull(colnum+tstart(ibuff))
1000 format(i4)
if (tnull(colnum+tstart(ibuff)) .gt. 999)then
dtype='A'//fwide
else if (tnull(colnum+tstart(ibuff)) .gt. 99)then
dtype='A'//fwide(2:4)
else if (tnull(colnum+tstart(ibuff)) .gt. 9)then
dtype='A'//fwide(3:4)
else if (tnull(colnum+tstart(ibuff)) .gt. 0)then
dtype='A'//fwide(4:4)
else
dtype='A'
end if
else if (tcode .eq. 14)then
dtype='L'
else if (tcode .eq. 1)then
dtype='X'
else if (tcode .eq. 11)then
dtype='B'
else if (tcode .eq. 83)then
dtype='C'
else if (tcode .eq. 163)then
dtype='M'
end if
if (descrp)then
ctemp='P'//dtype(1:1)
dtype=ctemp
end if
C read remaining values from the header keywords
xtype=' '
call ftgkns(iunit,'TTYPE',colnum,1,xtype,nfound,status)
xunit=' '
call ftgkns(iunit,'TUNIT',colnum,1,xunit,nfound,status)
xdisp=' '
call ftgkns(iunit,'TDISP',colnum,1,xdisp,nfound,status)
end
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