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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include <error.h>
include <mach.h>
include <fset.h>
include "qpoe.h"
include "qpio.h"
define SZ_CODE 7
# QPIO_MKINDEX -- Make an index for the event list associated with the QPIO
# descriptor. The event list must have been already written out, in sorted
# order according to the given key. Once an event list is indexed it cannot
# be further extended or otherwise modified. The key fields are specified
# as, e.g., "s10,s8" or "(s10,s8)" (Y // X), where the field name is the
# datatype code (silrd for short, int, long, real, or double) followed by the
# decimal byte offset of the field in the event struct.
procedure qpio_mkindex (io, key)
pointer io #I QPIO descriptor
char key[ARB] #I list of key fields
pointer sp, tokbuf, ip, in, ev, ev_p, ov, lv, oo, bp
int ox, line, nevents, szs_event, ncols, nlines, nout, x, y, i, ch
int token, offset, xoff, yoff, len_index, nev, fd, sv_evi, firstev
int dtype, ntype
long note()
pointer qp_opentext()
int qp_gettok(), ctoi(), qpio_rbucket(), pl_p2li(), sizeof()
errchk qp_opentext, qpio_rbucket, qpio_sync, write, calloc, syserrs
define nosort_ 91
begin
call smark (sp)
call salloc (tokbuf, SZ_TOKBUF, TY_CHAR)
call malloc (oo, IO_NLINES(io) * 3 + 32, TY_SHORT)
ncols = IO_NCOLS(io)
nlines = IO_NLINES(io)
sv_evi = IO_EVI(io)
# Key defaults to sort x/y.
xoff = IO_EVXOFF(io)
yoff = IO_EVYOFF(io)
dtype = IO_EVXTYPE(io)
# Parse key list (macro references are permitted) to get offsets of
# the X and Y coordinate fields to be used as the index key.
in = qp_opentext (IO_QP(io), key)
do i = 1, 2 {
# Get next field token.
repeat {
token = qp_gettok (in, Memc[tokbuf], SZ_TOKBUF)
} until (token == EOF || token == TOK_IDENTIFIER)
if (token == EOF)
break
# Determine field type.
call strlwr (Memc[tokbuf])
ch = Memc[tokbuf]
switch (ch) {
case 's':
ntype = TY_SHORT
case 'i':
ntype = TY_INT
case 'l':
ntype = TY_LONG
case 'r':
ntype = TY_REAL
case 'd':
ntype = TY_DOUBLE
default:
call syserrs (SYS_QPXYFNS, key)
}
# Both X and Y must be the same type.
if (i == 1)
dtype = ntype
else if (ntype != dtype)
call syserrs (SYS_QPINVEVT, key)
ip = tokbuf + 1
if (ctoi (Memc, ip, offset) <= 0)
call syserrs (SYS_QPBADKEY, key)
else
offset = offset / (sizeof(dtype) * SZB_CHAR)
if (i == 1)
yoff = offset
else
xoff = offset
while (qp_gettok (in, Memc[tokbuf], SZ_TOKBUF) != EOF)
if (Memc[tokbuf] == ',')
break
}
call qp_closetext (in)
# Sync the event list to ensure that the bucket is flushed.
call qpio_sync (io)
fd = IO_FD(io)
bp = IO_BP(io)
len_index = nlines
szs_event = IO_EVENTLEN(io)
if (IO_DEBUG(io) > 1) {
call eprintf ("qpio_mkindex (%xX, `%s')\n")
call pargi (io)
call pargstr (key)
call eprintf ("nevents=%d, evsize=%d, xkey=%c%d, ykey=%c%d\n")
call pargi (IO_NEVENTS(io))
call pargi (szs_event)
call pargi (ch)
call pargi (xoff)
call pargi (ch)
call pargi (yoff)
}
# Allocate the offset and length vectors (comprising the index).
# These are deallocated at qpio_close time.
call calloc (ov, len_index, TY_INT)
call calloc (lv, len_index, TY_INT)
ox = -1
line = 1
firstev = 1
nevents = 0
# Rewind the list.
i = qpio_rbucket (io, 1)
# For each event in the event list...
for (IO_EVI(io)=1; IO_EVI(io) <= IO_NEVENTS(io); ) {
# Refill the event bucket?
if (IO_EVI(io) > IO_BKLASTEV(io))
if (qpio_rbucket (io, IO_EVI(io)) == EOF)
break
# Process all events in the bucket.
ev = bp + (IO_EVI(io) - IO_BKFIRSTEV(io)) * szs_event
nev = min (IO_NEVENTS(io), IO_BKLASTEV(io)) - IO_EVI(io) + 1
nout = 0
do i = 1, nev {
ev_p = (ev - 1) * SZ_SHORT / sizeof(dtype) + 1
switch (dtype) {
case TY_SHORT:
x = Mems[ev_p+xoff]
y = Mems[ev_p+yoff]
case TY_INT:
x = Memi[ev_p+xoff]
y = Memi[ev_p+yoff]
case TY_LONG:
x = Meml[ev_p+xoff]
y = Meml[ev_p+yoff]
case TY_REAL:
x = Memr[ev_p+xoff] + 0.5
y = Memr[ev_p+yoff] + 0.5
case TY_DOUBLE:
x = Memd[ev_p+xoff] + 0.5
y = Memd[ev_p+yoff] + 0.5
}
x = max(1, min(ncols, x))
y = max(1, min(nlines, y))
if (IO_DEBUG(io) > 4) {
# Egads! Dump every photon.
call eprintf ("(%04d,%04d) ")
call pargi (x)
call pargi (y)
nout = nout + 1
if (nout >= 6) {
call eprintf ("\n")
nout = 0
}
}
if (y > line) {
# Add index entry.
if (nevents > 0) {
Memi[ov+line-1] = firstev
Memi[lv+line-1] = nevents
if (IO_DEBUG(io) > 3 && nevents > 0) {
if (nout > 0) {
call eprintf ("\n")
nout = 0
}
call eprintf ("%4d: ev=%d, nev=%d\n")
call pargi (line)
call pargi (firstev)
call pargi (nevents)
}
}
# Set up the new line.
firstev = IO_EVI(io) + i - 1
nevents = 1
line = y
ox = x
} else if (y == line) {
# Add another event to the current line.
nevents = nevents + 1
if (x < ox)
goto nosort_
else
ox = x
} else
goto nosort_
ev = ev + szs_event
}
IO_EVI(io) = IO_EVI(io) + nev
if (nout > 0) {
call eprintf ("\n")
nout = 0
}
}
# Output final index entry.
if (nevents > 0) {
Memi[ov+line-1] = firstev
Memi[lv+line-1] = nevents
}
# Apply data compression to the index arrays and append to the event
# list lfile.
call fseti (fd, F_BUFSIZE, len_index * SZ_INT)
call seek (fd, EOF)
IO_YOFFVOFF(io) = note (fd)
IO_YOFFVLEN(io) = pl_p2li (Memi[ov], 1, Mems[oo], len_index)
call write (fd, Mems[oo], IO_YOFFVLEN(io) * SZ_SHORT)
IO_YLENVOFF(io) = note (fd)
IO_YLENVLEN(io) = pl_p2li (Memi[lv], 1, Mems[oo], len_index)
call write (fd, Mems[oo], IO_YLENVLEN(io) * SZ_SHORT)
call flush (fd)
call fseti (fd, F_BUFSIZE, 0)
# Update the remaining index related fields of the QPIO descriptor.
IO_INDEXLEN(io) = len_index
IO_YOFFVP(io) = ov
IO_YLENVP(io) = lv
IO_IXXOFF(io) = xoff
IO_IXYOFF(io) = yoff
IO_IXXTYPE(io) = dtype
IO_IXYTYPE(io) = dtype
if (IO_DEBUG(io) > 1) {
call eprintf ("index.offv %d words at offset %d\n")
call pargi (IO_YOFFVLEN(io))
call pargi (IO_YOFFVOFF(io))
call eprintf ("index.lenv %d words at offset %d\n")
call pargi (IO_YLENVLEN(io))
call pargi (IO_YLENVOFF(io))
}
# Update the event list header.
call qpio_sync (io)
IO_EVI(io) = sv_evi
call sfree (sp)
return
nosort_
# A nonsorted event list has been detected, hence we cannot build
# an index, but we need not abort since nonindexed event lists are
# still usable.
if (nout > 0)
call eprintf ("\n")
iferr (call syserrs (SYS_QPEVNSORT, Memc[IO_PARAM(io)]))
call erract (EA_WARN)
IO_INDEXLEN(io) = 0
call mfree (ov, TY_INT)
call mfree (lv, TY_INT)
IO_EVI(io) = sv_evi
call sfree (sp)
end
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