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include "../ptkeysdef.h"
# PT_CHOOSE -- Determine which fields are to be selected.
int procedure pt_choose (key, fields)
pointer key # pointer to key structure
char fields[ARB] # fields to be evaluated
int max_nkeys, nkeys, index, elems, nelems, element, len
pointer list, sp, kname, uname, fname, aranges, ranges, rangeset
pointer nop, uop, fop
int pt_gnfn(), pt_ranges(), strdic(), decode_ranges(), get_next_number()
int pt_kstati()
pointer pt_ofnl()
real asumi()
begin
# Allocate buffer space
call smark (sp)
call salloc (kname, KY_SZPAR, TY_CHAR)
call salloc (uname, KY_SZPAR, TY_CHAR)
call salloc (fname, KY_SZPAR, TY_CHAR)
call salloc (aranges, SZ_FNAME, TY_CHAR)
call salloc (ranges, SZ_FNAME, TY_CHAR)
call salloc (rangeset, 3 * KY_MAXNRANGES + 1, TY_INT)
# Allocate space for the select buffers. Space equal to the number
# of keys in the database is allocated. Allowance must be made for
# array subsripts.
max_nkeys = int (asumi (Memi[KY_NELEMS(key)], KY_NKEYS(key))) + 1
if (KY_SELECT(key) != NULL)
call mfree (KY_SELECT(key), TY_INT)
call malloc (KY_SELECT(key), max_nkeys, TY_INT)
if (KY_ELEM_SELECT(key) != NULL)
call mfree (KY_ELEM_SELECT(key), TY_INT)
call malloc (KY_ELEM_SELECT(key), max_nkeys, TY_INT)
if (KY_LEN_SELECT(key) != NULL)
call mfree (KY_LEN_SELECT(key), TY_INT)
call malloc (KY_LEN_SELECT(key), max_nkeys, TY_INT)
if (KY_NAME_SELECT(key) != NULL)
call mfree (KY_NAME_SELECT(key), TY_CHAR)
call malloc (KY_NAME_SELECT(key), max_nkeys * KY_SZPAR, TY_CHAR)
if (KY_UNIT_SELECT(key) != NULL)
call mfree (KY_UNIT_SELECT(key), TY_CHAR)
call malloc (KY_UNIT_SELECT(key), max_nkeys * KY_SZPAR, TY_CHAR)
if (KY_FMT_SELECT(key) != NULL)
call mfree (KY_FMT_SELECT(key), TY_CHAR)
call malloc (KY_FMT_SELECT(key), max_nkeys * KY_SZPAR, TY_CHAR)
nop = KY_NAME_SELECT(key)
uop = KY_UNIT_SELECT(key)
fop = KY_FMT_SELECT(key)
nkeys = 0
# Loop through the fields list.
list = pt_ofnl (key, fields)
while (pt_gnfn (list, Memc[kname], Memc[aranges], KY_SZPAR) != EOF) {
# Find the field name and the ranges.
index = strdic (Memc[kname], Memc[kname], KY_SZPAR,
Memc[KY_WORDS(key)])
if (pt_ranges (Memc[aranges], Memc[ranges], element,
SZ_FNAME) == ERR)
call error (0, "Cannot decode apphot range string")
if (index == 0)
next
# Get the length, format and the units strings.
nelems = pt_kstati (key, Memc[kname], KY_NUMELEMS)
len = pt_kstati (key, Memc[kname], KY_LENGTH)
call pt_kstats (key, Memc[kname], KY_UNITSTR, Memc[uname],
KY_SZPAR)
call pt_kstats (key, Memc[kname], KY_FMTSTR, Memc[fname],
KY_SZPAR)
# Load the fields.
if (nelems == 1) {
Memi[KY_SELECT(key)+nkeys] = index
Memi[KY_ELEM_SELECT(key)+nkeys] = 1
Memi[KY_LEN_SELECT(key)+nkeys] = len
call sprintf (Memc[nop], len, "%*.*s")
call pargi (-len)
call pargi (len)
call pargstr (Memc[kname])
nop = nop + len
call sprintf (Memc[uop], len, "%*.*s")
call pargi (-len)
call pargi (len)
call pargstr (Memc[uname])
uop = uop + len
call sprintf (Memc[fop], len, "%*.*s")
call pargi (-len)
call pargi (len)
call pargstr (Memc[fname])
fop = fop + len
nkeys = nkeys + 1
} else {
if (Memc[ranges] == EOS) {
call sprintf (Memc[ranges], SZ_FNAME, "1-%d")
call pargi (nelems)
}
if (decode_ranges (Memc[ranges], Memi[rangeset], KY_MAXNRANGES,
elems) == ERR)
call error (0, "Cannot decode ranges string")
elems = 0
while (get_next_number (Memi[rangeset], elems) != EOF) {
if (elems < 1 || elems > nelems)
break
Memi[KY_SELECT(key)+nkeys] = index
Memi[KY_ELEM_SELECT(key)+nkeys] = elems
Memi[KY_LEN_SELECT(key)+nkeys] = len
call sprintf (Memc[nop], max_nkeys * KY_SZPAR, "%s%*.*d")
call pargstr (Memc[kname])
call pargi (-len)
call pargi (len)
call pargi (elems)
nop = nop + len
call sprintf (Memc[uop], len, "%*.*s")
call pargi (-len)
call pargi (len)
call pargstr (Memc[uname])
uop = uop + len
call sprintf (Memc[fop], len, "%*.*s")
call pargi (-len)
call pargi (len)
call pargstr (Memc[fname])
fop = fop + len
nkeys = nkeys + 1
}
}
}
# Reallocate the select buffer space.
KY_NSELECT(key) = nkeys
call realloc (KY_SELECT(key), KY_NSELECT(key), TY_INT)
call realloc (KY_ELEM_SELECT(key), KY_NSELECT(key), TY_INT)
call realloc (KY_LEN_SELECT(key), KY_NSELECT(key), TY_INT)
call realloc (KY_NAME_SELECT(key), KY_NSELECT(key) * KY_SZPAR, TY_CHAR)
call realloc (KY_UNIT_SELECT(key), KY_NSELECT(key) * KY_SZPAR, TY_CHAR)
call realloc (KY_FMT_SELECT(key), KY_NSELECT(key) * KY_SZPAR, TY_CHAR)
# Free list storage space.
call pt_cfnl (list)
call sfree (sp)
return (nkeys)
end
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