blob: 2f173b1c9da6f6510da0741a43dda6c849811b4d (
plain) (
blame)
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
|
include defs
# stlu --- symbol table lookup primitive
integer function stlu (symbol, node, pred, st)
character symbol (ARB)
pointer node, pred, st
DS_DECL(Mem, 1)
integer hash, i, j, nodsiz
nodsiz = Mem (st)
hash = 0
for (i = 1; symbol (i) != EOS; i = i + 1)
hash = hash + symbol (i)
hash = mod (hash, ST_HTABSIZE) + 1
pred = st + hash
node = Mem (pred)
while (node != LAMBDA) {
i = 1
j = node + ST_DATA + nodsiz
while (symbol (i) == Mem (j)) {
if (symbol (i) == EOS)
return (YES)
i = i + 1
j = j + 1
}
pred = node
node = Mem (pred + ST_LINK)
}
return (NO)
end
|
