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include defs
# dsget --- get pointer to block of at least w available words
pointer function dsget (w)
integer w
DS_DECL(Mem, 1)
pointer p, q, l
integer n, k, junk
integer getlin
character c (10)
n = w + DS_OHEAD
q = DS_AVAIL
repeat {
p = Mem (q + DS_LINK)
if (p == LAMBDA) {
call remark ("in dsget: out of storage space.")
call remark ("type 'c' or 'i' for char or integer dump.")
junk = getlin (c, STDIN)
if (c (1) == LETC | c (1) == BIGC)
call dsdump (LETTER)
else if (c (1) == LETI | c (1) == BIGI)
call dsdump (DIGIT)
call error ("program terminated.")
}
if (Mem (p + DS_SIZE) >= n)
break
q = p
}
k = Mem (p + DS_SIZE) - n
if (k >= DS_CLOSE) {
Mem (p + DS_SIZE) = k
l = p + k
Mem (l + DS_SIZE) = n
}
else {
Mem (q + DS_LINK) = Mem (p + DS_LINK)
l = p
}
return (l + DS_OHEAD)
end
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