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use "auxil.sml";
load "PackRealLittle";
local
structure P = PackRealLittle
fun hex w = StringCvt.padLeft #"0" 2 (Word8.fmt StringCvt.HEX w)
fun pow n i =
let fun loop 0 acc = acc
| loop i acc = loop (i-1) (n * acc)
in loop i 1
end
in
fun roundtrip r =
let val packed = P.toBytes r
val endian = if P.isBigEndian then "(big endian)\n"
else "(little endian)\n"
in app print [" ", Real.fmt (StringCvt.FIX NONE) r, " is enconded as "]
; Word8Vector.app (fn w => app print [hex w, " "]) packed
; print endian
; Real.== (r, P.fromBytes packed)
end
val test_roundtrip =
check'(fn _ =>
List.all roundtrip
[~420.0,
~1.1,
~0.123456789,
~0.0,
0.0,
1.0,
1.1,
2.0,
420E6,
real (valOf Int.maxInt),
real (pow 2 53 - 1),
real (pow 2 53),
real (pow 2 53 + 1),
Math.pi,
Math.e]);
val encoded =
[0wx40, 0wx09, 0wx21, 0wxFB, 0wx54, 0wx44, 0wx2D, 0wx18,
0wx40, 0wx09, 0wx21, 0wxFB, 0wx54, 0wx44, 0wx2D, 0wx18]
val test_subvec =
let val encoded = Word8Vector.fromList encoded
in check'(fn _ => Real.== (P.subVec(encoded, 0),
P.subVec(encoded, 1)))
end;
val test_subarr =
let val encoded = Word8Array.fromList encoded
in check'(fn _ => Real.== (P.subArr(encoded, 0),
P.subArr(encoded, 1)))
end;
val test_update0 =
let val encoded = Word8Array.fromList encoded
in check'(fn _ =>
( P.update(encoded, 0, 0.0)
; Real.== (P.subArr(encoded, 0),
0.0)
))
end;
val test_update1 =
let val encoded = Word8Array.fromList encoded
in check'(fn _ =>
( P.update(encoded, 1, 1.0)
; Real.== (P.subArr(encoded, 1),
1.0)
))
end;
end
|
