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include defs
# ctoi - convert string at in(i) to integer, increment i
integer function ctoi(in, i)
character in (ARB)
integer i
integer d
external index
integer index
# string digits "0123456789"
character digits(11)
data digits (1) /DIG0/,
digits (2) /DIG1/,
digits (3) /DIG2/,
digits (4) /DIG3/,
digits (5) /DIG4/,
digits (6) /DIG5/,
digits (7) /DIG6/,
digits (8) /DIG7/,
digits (9) /DIG8/,
digits (10) /DIG9/,
digits (11) /EOS/
while (in (i) == BLANK | in (i) == TAB)
i = i + 1
for (ctoi = 0; in (i) != EOS; i = i + 1) {
d = index (digits, in (i))
if (d == 0) # non-digit
break
ctoi = 10 * ctoi + d - 1
}
return
end
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