1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
# 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]
int len_object
int strlen()
errchk wft_encodeb, wft_encodei, wft_encodel, wft_encode_axis
begin
# Get mandatory keywords.
switch (cardno) {
case FIRST_CARD:
if (XTENSION(fits) == EXT_PRIMARY) {
call wft_encodeb ("SIMPLE", YES, card, "FITS STANDARD")
} else {
len_object = max (min (LEN_OBJECT, strlen ("IMAGE")),
LEN_STRING)
call wft_encodec ("XTENSION", "IMAGE", len_object, card,
"IMAGE EXTENSION")
}
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_DATE]
int len_object, stat
int strlen()
errchk wft_encoded, wft_encodec, wft_encode_blank, wft_encoder, wft_encodei
errchk wft_encode_date
include "wfits.com"
begin
stat = YES
# get optional keywords
switch (optiono) {
case KEY_EXTEND:
if (XTENSION(fits) == EXT_IMAGE || wextensions == NO)
stat = NO
else
call wft_encodeb ("EXTEND", YES, card,
"STANDARD EXTENSIONS MAY BE PRESENT")
case KEY_PCOUNT:
if (XTENSION(fits) == EXT_PRIMARY)
stat = NO
else
call wft_encodei ("PCOUNT", 0, card, "NO RANDOM PARAMETERS")
case KEY_GCOUNT:
if (XTENSION(fits) == EXT_PRIMARY)
stat = NO
else
call wft_encodei ("GCOUNT", 1, card, "ONLY ONE GROUP")
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_DATE)
len_object = max (min (LEN_OBJECT, strlen (datestr)), LEN_STRING)
call wft_encodec ("DATE", datestr, len_object, 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, "^FILENAME") != 0) {
stat = NO
} else if (strmatch (card, "^IRAFNAME") != 0) {
stat = NO
} else if (strmatch (card, "^EXTEND ") != 0) {
stat = NO
} else if (strmatch (card, "^EXTNAME ") != 0) {
stat = NO
} else if (strmatch (card, "^EXTVER ") != 0) {
stat = NO
} else if (strmatch (card, "^INHERIT ") != 0) {
stat = NO
} else if (strmatch (card, "^IRAF-TLM") != 0) {
stat = NO
} else if (strmatch (card, "^OBJECT ") != 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
|
