diff options
Diffstat (limited to 'src/mochiweb/mochinum.erl')
| -rw-r--r-- | src/mochiweb/mochinum.erl | 82 |
1 files changed, 62 insertions, 20 deletions
diff --git a/src/mochiweb/mochinum.erl b/src/mochiweb/mochinum.erl index 6a866042..a7e2bfbc 100644 --- a/src/mochiweb/mochinum.erl +++ b/src/mochiweb/mochinum.erl @@ -11,7 +11,7 @@ -module(mochinum). -author("Bob Ippolito <bob@mochimedia.com>"). --export([digits/1, frexp/1, int_pow/2, int_ceil/1, test/0]). +-export([digits/1, frexp/1, int_pow/2, int_ceil/1]). %% IEEE 754 Float exponent bias -define(FLOAT_BIAS, 1022). @@ -120,7 +120,7 @@ digits1(Float, Exp, Frac) -> case Exp >= 0 of true -> BExp = 1 bsl Exp, - case (Frac /= ?BIG_POW) of + case (Frac =/= ?BIG_POW) of true -> scale((Frac * BExp * 2), 2, BExp, BExp, Round, Round, Float); @@ -129,7 +129,7 @@ digits1(Float, Exp, Frac) -> Round, Round, Float) end; false -> - case (Exp == ?MIN_EXP) orelse (Frac /= ?BIG_POW) of + case (Exp =:= ?MIN_EXP) orelse (Frac =/= ?BIG_POW) of true -> scale((Frac * 2), 1 bsl (1 - Exp), 1, 1, Round, Round, Float); @@ -228,14 +228,13 @@ log2floor(Int, N) -> log2floor(Int bsr 1, 1 + N). -test() -> - ok = test_frexp(), - ok = test_int_ceil(), - ok = test_int_pow(), - ok = test_digits(), - ok. +%% +%% Tests +%% +-include_lib("eunit/include/eunit.hrl"). +-ifdef(TEST). -test_int_ceil() -> +int_ceil_test() -> 1 = int_ceil(0.0001), 0 = int_ceil(0.0), 1 = int_ceil(0.99), @@ -244,7 +243,7 @@ test_int_ceil() -> -2 = int_ceil(-2.0), ok. -test_int_pow() -> +int_pow_test() -> 1 = int_pow(1, 1), 1 = int_pow(1, 0), 1 = int_pow(10, 0), @@ -253,17 +252,58 @@ test_int_pow() -> 1000 = int_pow(10, 3), ok. -test_digits() -> - "0" = digits(0), - "0.0" = digits(0.0), - "1.0" = digits(1.0), - "-1.0" = digits(-1.0), - "0.1" = digits(0.1), - "0.01" = digits(0.01), - "0.001" = digits(0.001), +digits_test() -> + ?assertEqual("0", + digits(0)), + ?assertEqual("0.0", + digits(0.0)), + ?assertEqual("1.0", + digits(1.0)), + ?assertEqual("-1.0", + digits(-1.0)), + ?assertEqual("0.1", + digits(0.1)), + ?assertEqual("0.01", + digits(0.01)), + ?assertEqual("0.001", + digits(0.001)), + ?assertEqual("1.0e+6", + digits(1000000.0)), + ?assertEqual("0.5", + digits(0.5)), + ?assertEqual("4503599627370496.0", + digits(4503599627370496.0)), + %% small denormalized number + %% 4.94065645841246544177e-324 + <<SmallDenorm/float>> = <<0,0,0,0,0,0,0,1>>, + ?assertEqual("4.9406564584124654e-324", + digits(SmallDenorm)), + ?assertEqual(SmallDenorm, + list_to_float(digits(SmallDenorm))), + %% large denormalized number + %% 2.22507385850720088902e-308 + <<BigDenorm/float>> = <<0,15,255,255,255,255,255,255>>, + ?assertEqual("2.225073858507201e-308", + digits(BigDenorm)), + ?assertEqual(BigDenorm, + list_to_float(digits(BigDenorm))), + %% small normalized number + %% 2.22507385850720138309e-308 + <<SmallNorm/float>> = <<0,16,0,0,0,0,0,0>>, + ?assertEqual("2.2250738585072014e-308", + digits(SmallNorm)), + ?assertEqual(SmallNorm, + list_to_float(digits(SmallNorm))), + %% large normalized number + %% 1.79769313486231570815e+308 + <<LargeNorm/float>> = <<127,239,255,255,255,255,255,255>>, + ?assertEqual("1.7976931348623157e+308", + digits(LargeNorm)), + ?assertEqual(LargeNorm, + list_to_float(digits(LargeNorm))), ok. -test_frexp() -> +frexp_test() -> %% zero {0.0, 0} = frexp(0.0), %% one @@ -287,3 +327,5 @@ test_frexp() -> <<LargeNorm/float>> = <<127,239,255,255,255,255,255,255>>, {0.99999999999999989, 1024} = frexp(LargeNorm), ok. + +-endif. |