117 lines
2.8 KiB
Scheme
117 lines
2.8 KiB
Scheme
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(library (tests fixnums)
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(export test-fxdiv-and-mod test-fxdiv0-and-mod0
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test-fxlength)
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(import (ikarus))
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(define (test-fxdiv-and-mod)
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(define (test x1 x2)
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(let-values ([(d m) (fxdiv-and-mod x1 x2)])
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(printf "(fxdiv-and-mod ~s ~s) = ~s ~s\n" x1 x2 d m)
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(assert (= d (fxdiv x1 x2)))
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(assert (= m (fxmod x1 x2)))
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(assert (<= 0 m))
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(assert (< m (abs x2)))
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(assert (= x1 (+ (* d x2) m)))))
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(test +17 +3)
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(test +17 -3)
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(test -17 +3)
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(test -17 -3)
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(test +16 +3)
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(test +16 -3)
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(test -16 +3)
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(test -16 -3)
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(test +15 +3)
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(test +15 -3)
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(test -15 +3)
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(test -15 -3)
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(test +10 +4)
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(test +10 -4)
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(test -10 +4)
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(test -10 -4))
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(define (test-fxdiv0-and-mod0)
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(define (test x1 x2)
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(let-values ([(d m) (fxdiv0-and-mod0 x1 x2)])
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(printf "(fxdiv0-and-mod0 ~s ~s) = ~s ~s\n" x1 x2 d m)
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(assert (= d (fxdiv0 x1 x2)))
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(assert (= m (fxmod0 x1 x2)))
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(assert (<= (- (abs (/ x2 2))) m))
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(assert (< m (abs (/ x2 2))))
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(assert (= x1 (+ (* d x2) m)))))
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(test +17 +3)
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(test +17 -3)
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(test -17 +3)
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(test -17 -3)
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(test +16 +3)
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(test +16 -3)
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(test -16 +3)
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(test -16 -3)
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(test +15 +3)
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(test +15 -3)
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(test -15 +3)
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(test -15 -3)
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(test +10 +4)
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(test +10 -4)
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(test -10 +4)
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(test -10 -4)
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(test (least-fixnum) +1)
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;(test (least-fixnum) -1) ;; overflows
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(test (greatest-fixnum) +1)
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(test (greatest-fixnum) -1)
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(test (least-fixnum) +2)
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(test (least-fixnum) -2)
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(test (greatest-fixnum) +2)
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(test (greatest-fixnum) -2)
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(test 0 (least-fixnum))
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(test 0 (greatest-fixnum))
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(test +1 (least-fixnum))
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(test +1 (greatest-fixnum))
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(test -1 (least-fixnum))
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(test -1 (greatest-fixnum))
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(test +2 (least-fixnum))
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(test +2 (greatest-fixnum))
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(test -2 (least-fixnum))
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(test -2 (greatest-fixnum))
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(test (least-fixnum) (least-fixnum))
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(test (greatest-fixnum) (least-fixnum))
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(test (least-fixnum) (greatest-fixnum))
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(test (greatest-fixnum) (greatest-fixnum)))
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(define (test-fxlength)
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(define (test x)
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(define (bitlen x)
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(if (zero? x)
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0
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(+ 1 (bitlen (bitwise-arithmetic-shift-right x 1)))))
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(define (len x)
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(if (< x 0)
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(bitlen (bitwise-not x))
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(bitlen x)))
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(let ([c0 (len x)]
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[c1 (fxlength x)])
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(unless (= c0 c1)
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(error 'test-fxlength "failed/expected/got" x c0 c1))))
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(define (fxtest x)
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(when (fixnum? x)
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(when (zero? (bitwise-and x #xFFFFFFF))
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(printf "fxlength ~s\n" x))
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(test x)
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(fxtest (+ x #x100))))
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(test 0)
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(test 1)
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(test 2)
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(test 3)
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(test -1)
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(test -2)
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(test -3)
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(fxtest (least-fixnum)))
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)
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