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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include "wfits.h"
# WFT_STANDARD_CARD -- Procedure for fetching the minimum header
# parameters required by fits. The end card is encoded separately.
int procedure wft_standard_card (cardno, im, fits, axisno, card)
int cardno # number of FITS standard card
pointer im # pointer to the IRAF image
pointer fits # pointer to the FITS structure
int axisno # axis number
char card[ARB] # FITS card image
char keyword[LEN_KEYWORD]
errchk wft_encodeb, wft_encodei, wft_encodel, wft_encode_axis
include "wfits.com"
begin
# Get mandatory keywords.
switch (cardno) {
case FIRST_CARD:
call wft_encodeb ("SIMPLE", YES, card, "FITS STANDARD")
case SECOND_CARD:
call wft_encodei ("BITPIX", FITS_BITPIX(fits), card,
"FITS BITS/PIXEL")
case THIRD_CARD:
call wft_encodei ("NAXIS", NAXIS(im), card, "NUMBER OF AXES")
default:
call wft_encode_axis ("NAXIS", keyword, axisno)
call wft_encodel (keyword, NAXISN(im, axisno), card, "")
axisno = axisno + 1
}
return (YES)
end
# WFT_OPTION_CARD -- Procedure for fetching optional FITS header parameters.
# At present these are bscale, bzero, bunit, blank, object, origin, date,
# irafmax, irafmin, iraf type and iraf bits per pixel. Blank is only encoded
# if there are a nonzero number of blanks in the IRAF image. Bunit and object
# are only encoded if the appropriate IRAF strings are defined. Bzero, bscale,
# irafmax, irafmin, iraf type and iraf bits per pixel are only encoded if
# there is a pixel file.
int procedure wft_option_card (im, fits, optiono, card)
pointer im # pointer to the IRAF image
pointer fits # pointer to FITS structure
int optiono # number of the option card
char card[ARB] # FITS card image
char datestr[LEN_STRING]
int len_object, stat
int strlen()
errchk wft_encoded, wft_encodec, wft_encode_blank, wft_encoder, wft_encodei
errchk wft_encode_date
begin
stat = YES
# get optional keywords
switch (optiono) {
case KEY_BSCALE:
if ((NAXIS(im) <= 0) || (FITS_BITPIX(fits) < 0))
stat = NO
else {
call wft_encoded ("BSCALE", BSCALE(fits), card,
"REAL = TAPE*BSCALE + BZERO", NDEC_DOUBLE)
}
case KEY_BZERO:
if ((NAXIS(im) <= 0) || (FITS_BITPIX(fits) < 0))
stat = NO
else
call wft_encoded ("BZERO", BZERO(fits), card, "", NDEC_DOUBLE)
case KEY_BUNIT:
stat = NO
case KEY_BLANK:
stat = NO
#if (NBPIX(im) == 0)
#stat = NO
#else
#call wft_encode_blank ("BLANK", BLANK_STRING(fits), card,
#"TAPE VALUE OF BLANK PIXEL")
case KEY_OBJECT:
if (OBJECT(im) == EOS)
stat = NO
else {
len_object = max (min (LEN_OBJECT, strlen (OBJECT(im))),
LEN_STRING)
call wft_encodec ("OBJECT", OBJECT(im), len_object, card, "")
}
case KEY_ORIGIN:
call wft_encodec ("ORIGIN", "KPNO-IRAF", LEN_ORIGIN, card, "")
case KEY_DATE:
call wft_encode_date (datestr, LEN_STRING)
call wft_encodec ("DATE", datestr, LEN_STRING, card, "")
case KEY_IRAFNAME:
len_object = max (min (LEN_OBJECT, strlen (IRAFNAME(fits))),
LEN_STRING)
call wft_encodec ("IRAFNAME", IRAFNAME(fits), len_object, card,
"NAME OF IRAF IMAGE FILE")
case KEY_IRAFMAX:
if (NAXIS(im) <= 0)
stat = NO
else
call wft_encoder ("IRAF-MAX", IRAFMAX(fits), card, "DATA MAX",
NDEC_REAL)
case KEY_IRAFMIN:
if (NAXIS(im) <= 0)
stat = NO
else
call wft_encoder ("IRAF-MIN", IRAFMIN(fits), card, "DATA MIN",
NDEC_REAL)
case KEY_IRAFBP:
if (NAXIS(im) <= 0)
stat = NO
else
call wft_encodei ("IRAF-BPX", DATA_BITPIX(fits), card,
"DATA BITS/PIXEL")
case KEY_IRAFTYPE:
if (NAXIS(im) <= 0)
stat = NO
else
call wft_encodec ("IRAFTYPE", TYPE_STRING(fits), LEN_STRING,
card, "PIXEL TYPE")
default:
stat = NO
}
optiono = optiono + 1
return (stat)
end
# WFT_HISTORY_CARD -- Procedure to fetch a single history line, trim newlines
# and pad with blanks to size LEN_CARD in order to create a FITS HISTORY card.
int procedure wft_history_card (im, hp, card)
pointer im # pointer to the IRAF image
int hp # pointer to first character to extract from string
char card[ARB] # FITS card image
char cval
char chfetch()
begin
if (chfetch (HISTORY(im), hp, cval) == EOS)
return (NO)
else {
hp = hp - 1
call strcpy ("HISTORY ", card, LEN_KEYWORD)
call wft_fits_card (HISTORY(im), hp, card, COL_VALUE - 2, LEN_CARD,
'\n')
return (YES)
}
end
# WFT_UNKNOWN_CARD -- Procedure to fetch a single unknown
# "line", trim newlines and pad blanks to size LEN_CARD in order to
# create an unknown keyword card. At present user area information is
# assumed to be in the form of FITS card images, less then or equal to
# 80 characters and delimited by a newline.
int procedure wft_unknown_card (im, up, card)
pointer im # pointer to the IRAF image
int up # pointer to next character in the unknown string
char card[ARB] # FITS card image
char cval
int stat, axis, index
char chfetch()
int strmatch(), ctoi()
begin
if (chfetch (UNKNOWN(im), up, cval) == EOS)
return (NO)
else {
up = up - 1
stat = NO
while (stat == NO) {
call wft_fits_card (UNKNOWN(im), up, card, 1, LEN_CARD, '\n')
if (card[1] == EOS)
break
if (strmatch (card, "^GROUPS ") != 0) {
stat = NO
} else if (strmatch (card, "^SIMPLE ") != 0) {
stat = NO
} else if (strmatch (card, "^BITPIX ") != 0) {
stat = NO
} else if (strmatch (card, "^NAXIS ") != 0) {
stat = NO
} else if (strmatch (card, "^NAXIS") != 0) {
index = LEN_NAXIS_KYWRD + 1
if (ctoi (card, index, axis) > 0)
stat = NO
else
stat = YES
} else if (strmatch (card, "^GCOUNT ") != 0) {
stat = NO
} else if (strmatch (card, "^PCOUNT ") != 0) {
stat = NO
} else if (strmatch (card, "^PSIZE ") != 0) {
stat = NO
} else if (strmatch (card, "^BSCALE ") != 0) {
stat = NO
} else if (strmatch (card, "^BZERO ") != 0) {
stat = NO
} else if (strmatch (card, "^BLANK ") != 0) {
stat = NO
} else if (strmatch (card, "^IRAF-MAX") != 0) {
stat = NO
} else if (strmatch (card, "^IRAF-MIN") != 0) {
stat = NO
} else if (strmatch (card, "^IRAFTYPE") != 0) {
stat = NO
} else if (strmatch (card, "^IRAF-B/P") != 0) {
stat = NO
} else if (strmatch (card, "^IRAF-BPX") != 0) {
stat = NO
} else if (strmatch (card, "^END ") != 0) {
stat = NO
} else
stat = YES
}
return (stat)
}
end
# WFT_LAST_CARD -- Procedure to encode the FITS end card.
int procedure wft_last_card (card)
char card[ARB] # FITS card image
begin
call sprintf (card, LEN_CARD, "%-8.8s %70w")
call pargstr ("END")
return (YES)
end
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