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C--------------------------------------------------------------------------
subroutine ftbdef(ounit,nfield,tform,pcount,nrows,status)
C Binary table data DEFinition
C define the structure of the binary table data unit
C
C ounit i Fortran I/O unit number
C nfield i number of fields in the table
C tform C the data format of the column
C nrows i number of rows in the table
C pcount i size in bytes of the special data block following the table
C status i output error status (0 = ok)
C
C written by Wm Pence, HEASARC/GSFC, June 1991
integer ounit,nfield,nrows,pcount,status
character*(*) tform(*)
C-------COMMON BLOCK DEFINITIONS:--------------------------------------------
integer nb,ne,nf
parameter (nb = 20)
parameter (ne = 200)
parameter (nf = 3000)
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)
character cnull*16, cform*8
common/ft0003/cnull(nf),cform(nf)
C-------END OF COMMON BLOCK DEFINITIONS-----------------------------------
integer ibuff,i,j,width
if (status .gt. 0)return
ibuff=bufnum(ounit)
if (dtstrt(ibuff) .lt. 0)then
C freeze the header at its current size
call fthdef(ounit,0,status)
if (status .gt. 0)return
end if
hdutyp(ibuff)=2
tfield(ibuff)=nfield
if (nxtfld + nfield .gt. nf)then
C too many columns open at one time; exceeded array dimensions
status=111
return
end if
tstart(ibuff)=nxtfld
nxtfld=nxtfld+nfield
if (nfield .eq. 0)then
C no data; the next HDU begins in the next logical block
hdstrt(ibuff,chdu(ibuff)+1)=dtstrt(ibuff)
scount(ibuff)=0
theap(ibuff)=0
nxheap(ibuff)=0
else
C initialize the table column parameters
do 5 i=1,nfield
tscale(i+tstart(ibuff))=1.
tzero(i+tstart(ibuff))=0.
C choose special value to indicate that null value is not defined
tnull(i+tstart(ibuff))=123454321
C reset character NUL string, in case it has been
C previously defined from an ASCII table extension
cnull(i+tstart(ibuff))=char(0)
C parse the tform strings to get the data type and repeat count
call ftbnfm(tform(i),tdtype(i+tstart(ibuff)),
& trept(i+tstart(ibuff)),width,status)
if (tdtype(i+tstart(ibuff)) .eq. 1)then
C treat Bit datatype as if it were a Byte datatype
tdtype(i+tstart(ibuff))=11
trept(i+tstart(ibuff))=(trept(i+tstart(ibuff))+7)/8
else if (tdtype(i+tstart(ibuff)) .eq. 16)then
C store ASCII unit string length in TNULL parameter
tnull(i+tstart(ibuff))=width
end if
if (status .gt. 0)return
5 continue
C determine byte offset of the beginning of each field and row length
call ftgtbc(nfield,tdtype(1+tstart(ibuff)),trept(1+
& tstart(ibuff)),tbcol(1+tstart(ibuff)),rowlen(ibuff),
& status)
C FITSIO deals with ASCII columns as arrays of strings, not
C arrays of characters, so need to change the repeat count
C to indicate the number of strings in the field, not the
C total number of characters in the field.
do 10 i=1,nfield
if (tdtype(i+tstart(ibuff)) .eq. 16)then
j=trept(i+tstart(ibuff))/tnull(i+tstart(ibuff))
trept(i+tstart(ibuff))=max(j,1)
end if
10 continue
C initialize the heap offset (=nrows x ncolumns)
C store the size of the special data area, if any
scount(ibuff)=pcount
theap(ibuff)=nrows*rowlen(ibuff)
nxheap(ibuff)=0
C calculate the start of the next header unit, based on the
C size of the data unit (table + special data)
hdstrt(ibuff,chdu(ibuff)+1)=
& dtstrt(ibuff)+(rowlen(ibuff)*nrows+pcount+2879)/2880*2880
end if
end
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