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include <error.h>
include <math.h>
# Group type definitions.
define GROUPS "|position|title|date|ccdtype|subset|"
define POSITION 1 # Group by position
define TITLE 2 # Group by title
define DATE 3 # Group by date
define CCDTYPE 4 # Group by ccdtype
define SUBSET 5 # Group by subset
define NALLOC 10 # Allocate memory in this size block
# T_CCDGROUPS -- Group images into files based on parameters with common values.
# The output consists of files containing the image names of images from the
# input image list which have the same group type such as position, date,
# or title.
procedure t_ccdgroups ()
int images # List of images
pointer root # Output group root name
int group # Group type
real radius # Position radius
bool verbose # Verbose output (package parameter)
int ngroup, fd, ntitles, npositions, ndates, ccdtype
pointer im, sp, image, output, suffix, titles, positions, dates
bool clgetb()
real clgetr()
int position_group(), title_group(), date_group()
int imtopenp(), imtgetim(), open(), clgwrd()
errchk set_input, position_group, title_group, date_group, open
begin
call smark (sp)
call salloc (image, SZ_FNAME, TY_CHAR)
call salloc (root, SZ_FNAME, TY_CHAR)
call salloc (output, SZ_FNAME, TY_CHAR)
call salloc (suffix, SZ_FNAME, TY_CHAR)
# Get the task parameters.
images = imtopenp ("images")
call clgstr ("output", Memc[root], SZ_FNAME)
group = clgwrd ("group", Memc[image], SZ_FNAME, GROUPS)
radius = clgetr ("radius")
call clgstr ("instrument", Memc[image], SZ_FNAME)
if (Memc[image] == EOS)
call error (1, "No 'instrument' translation file specified.")
call hdmopen (Memc[image])
verbose = clgetb ("verbose")
# Loop through the images and place them into groups.
positions = NULL
npositions = 0
titles = NULL
ntitles = 0
dates = NULL
ndates = 0
while (imtgetim (images, Memc[image], SZ_FNAME) != EOF) {
call set_input (Memc[image], im, ccdtype)
if (im == NULL)
next
iferr {
switch (group) {
case POSITION:
ngroup = position_group (im, positions, npositions, radius)
case TITLE:
ngroup = title_group (im, titles, ntitles)
case DATE:
ngroup = date_group (im, dates, ndates)
}
# Define the output group file.
switch (group) {
case POSITION, TITLE, DATE:
call sprintf (Memc[output], SZ_FNAME, "%s%d")
call pargstr (Memc[root])
call pargi (ngroup)
case CCDTYPE:
call ccdtypes (im, Memc[suffix], SZ_FNAME)
call sprintf (Memc[output], SZ_FNAME, "%s%d")
call pargstr (Memc[root])
call pargstr (Memc[suffix])
case SUBSET:
call ccdsubset (im, Memc[suffix], SZ_FNAME)
call sprintf (Memc[output], SZ_FNAME, "%s%d")
call pargstr (Memc[root])
call pargstr (Memc[suffix])
}
# Print the operation if verbose.
if (verbose) {
call printf ("%s --> %s\n")
call pargstr (Memc[image])
call pargstr (Memc[output])
}
# Enter the image in the appropriate group file.
fd = open (Memc[output], APPEND, TEXT_FILE)
call fprintf (fd, "%s\n")
call pargstr (Memc[image])
call close (fd)
} then
call erract (EA_WARN)
call imunmap (im)
}
# Finish up.
call imtclose (images)
if (positions != NULL)
call mfree (positions, TY_REAL)
if (titles != NULL)
call mfree (titles, TY_CHAR)
if (dates != NULL)
call mfree (dates, TY_CHAR)
call sfree (sp)
end
# TITLE_GROUP -- Group images by title.
int procedure title_group (im, titles, ntitles)
pointer im # Image
pointer titles # Pointer to title strings
int ntitles # Number of titles
int i, nalloc
pointer sp, title, ptr
bool streq()
errchk hdmgstr
begin
call smark (sp)
call salloc (title, SZ_LINE, TY_CHAR)
call hdmgstr (im, "title", Memc[title], SZ_LINE)
for (i=1; i<=ntitles; i=i+1) {
ptr = titles + (i - 1) * SZ_LINE
if (streq (Memc[title], Memc[ptr]))
break
}
if (i > ntitles) {
if (i == 1) {
nalloc = NALLOC
call malloc (titles, nalloc * SZ_LINE, TY_CHAR)
} else if (i > nalloc) {
nalloc = nalloc + NALLOC
call realloc (titles, nalloc * SZ_LINE, TY_CHAR)
}
ptr = titles + (i - 1) * SZ_LINE
call strcpy (Memc[title], Memc[ptr], SZ_LINE-1)
ntitles = i
}
call sfree (sp)
return (i)
end
# POSITION_GROUP -- Group by RA and DEC position. The RA is in hours and
# the DEC is in degrees. The radius is in seconds of arc.
int procedure position_group (im, positions, npositions, radius)
pointer im # Image
pointer positions # Positions
int npositions # Number of positions
real radius # Matching radius
real ra, dec, dra, ddec, r, hdmgetr()
int i, nalloc
pointer ptr
errchk hdmgetr
begin
ra = hdmgetr (im, "ra")
dec = hdmgetr (im, "dec")
for (i=1; i<=npositions; i=i+1) {
ptr = positions + 2 * i - 2
dra = ra - Memr[ptr]
ddec = dec - Memr[ptr+1]
if (dra > 12.)
dra = dra - 24.
if (dra < -12.)
dra = dra + 24.
dra = dra * cos (DEGTORAD (dec)) * 15.
r = sqrt (dra ** 2 + ddec ** 2) * 3600.
if (r < radius)
break
}
if (i > npositions) {
if (i == 1) {
nalloc = NALLOC
call malloc (positions, nalloc * 2, TY_REAL)
} else if (i > nalloc) {
nalloc = nalloc + NALLOC
call realloc (positions, nalloc * 2, TY_REAL)
}
ptr = positions + 2 * i - 2
Memr[ptr] = ra
Memr[ptr+1] = dec
npositions = i
}
return (i)
end
# DATE_GROUP -- Group by date.
int procedure date_group (im, dates, ndates)
pointer im # Image
pointer dates # Pointer to date strings
int ndates # Number of dates
int i, nalloc, stridxs()
pointer sp, date, ptr
bool streq()
errchk hdmgstr
begin
call smark (sp)
call salloc (date, SZ_LINE, TY_CHAR)
call hdmgstr (im, "date-obs", Memc[date], SZ_LINE)
# Strip time if present.
i = stridxs ("T", Memc[date])
if (i > 0)
Memc[date+i-1] = EOS
for (i=1; i<=ndates; i=i+1) {
ptr = dates + (i - 1) * SZ_LINE
if (streq (Memc[date], Memc[ptr]))
break
}
if (i > ndates) {
if (i == 1) {
nalloc = NALLOC
call malloc (dates, nalloc * SZ_LINE, TY_CHAR)
} else if (i > nalloc) {
nalloc = nalloc + NALLOC
call realloc (dates, nalloc * SZ_LINE, TY_CHAR)
}
ptr = dates + (i - 1) * SZ_LINE
call strcpy (Memc[date], Memc[ptr], SZ_LINE-1)
ndates = i
}
call sfree (sp)
return (i)
end
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