| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package strconv_test |
| |
| import ( |
| "os" |
| "reflect" |
| . "strconv" |
| "testing" |
| ) |
| |
| type atofTest struct { |
| in string |
| out string |
| err os.Error |
| } |
| |
| var atoftests = []atofTest{ |
| {"", "0", os.EINVAL}, |
| {"1", "1", nil}, |
| {"+1", "1", nil}, |
| {"1x", "0", os.EINVAL}, |
| {"1.1.", "0", os.EINVAL}, |
| {"1e23", "1e+23", nil}, |
| {"100000000000000000000000", "1e+23", nil}, |
| {"1e-100", "1e-100", nil}, |
| {"123456700", "1.234567e+08", nil}, |
| {"99999999999999974834176", "9.999999999999997e+22", nil}, |
| {"100000000000000000000001", "1.0000000000000001e+23", nil}, |
| {"100000000000000008388608", "1.0000000000000001e+23", nil}, |
| {"100000000000000016777215", "1.0000000000000001e+23", nil}, |
| {"100000000000000016777216", "1.0000000000000003e+23", nil}, |
| {"-1", "-1", nil}, |
| {"-0", "-0", nil}, |
| {"1e-20", "1e-20", nil}, |
| {"625e-3", "0.625", nil}, |
| |
| // NaNs |
| {"nan", "NaN", nil}, |
| {"NaN", "NaN", nil}, |
| {"NAN", "NaN", nil}, |
| |
| // Infs |
| {"inf", "+Inf", nil}, |
| {"-Inf", "-Inf", nil}, |
| {"+INF", "+Inf", nil}, |
| |
| // largest float64 |
| {"1.7976931348623157e308", "1.7976931348623157e+308", nil}, |
| {"-1.7976931348623157e308", "-1.7976931348623157e+308", nil}, |
| // next float64 - too large |
| {"1.7976931348623159e308", "+Inf", os.ERANGE}, |
| {"-1.7976931348623159e308", "-Inf", os.ERANGE}, |
| // the border is ...158079 |
| // borderline - okay |
| {"1.7976931348623158e308", "1.7976931348623157e+308", nil}, |
| {"-1.7976931348623158e308", "-1.7976931348623157e+308", nil}, |
| // borderline - too large |
| {"1.797693134862315808e308", "+Inf", os.ERANGE}, |
| {"-1.797693134862315808e308", "-Inf", os.ERANGE}, |
| |
| // a little too large |
| {"1e308", "1e+308", nil}, |
| {"2e308", "+Inf", os.ERANGE}, |
| {"1e309", "+Inf", os.ERANGE}, |
| |
| // way too large |
| {"1e310", "+Inf", os.ERANGE}, |
| {"-1e310", "-Inf", os.ERANGE}, |
| {"1e400", "+Inf", os.ERANGE}, |
| {"-1e400", "-Inf", os.ERANGE}, |
| {"1e400000", "+Inf", os.ERANGE}, |
| {"-1e400000", "-Inf", os.ERANGE}, |
| |
| // denormalized |
| {"1e-305", "1e-305", nil}, |
| {"1e-306", "1e-306", nil}, |
| {"1e-307", "1e-307", nil}, |
| {"1e-308", "1e-308", nil}, |
| {"1e-309", "1e-309", nil}, |
| {"1e-310", "1e-310", nil}, |
| {"1e-322", "1e-322", nil}, |
| // smallest denormal |
| {"5e-324", "5e-324", nil}, |
| {"4e-324", "5e-324", nil}, |
| {"3e-324", "5e-324", nil}, |
| // too small |
| {"2e-324", "0", nil}, |
| // way too small |
| {"1e-350", "0", nil}, |
| {"1e-400000", "0", nil}, |
| |
| // try to overflow exponent |
| {"1e-4294967296", "0", nil}, |
| {"1e+4294967296", "+Inf", os.ERANGE}, |
| {"1e-18446744073709551616", "0", nil}, |
| {"1e+18446744073709551616", "+Inf", os.ERANGE}, |
| |
| // Parse errors |
| {"1e", "0", os.EINVAL}, |
| {"1e-", "0", os.EINVAL}, |
| {".e-1", "0", os.EINVAL}, |
| } |
| |
| func init() { |
| // The atof routines return NumErrors wrapping |
| // the error and the string. Convert the table above. |
| for i := range atoftests { |
| test := &atoftests[i] |
| if test.err != nil { |
| test.err = &NumError{test.in, test.err} |
| } |
| } |
| } |
| |
| func testAtof(t *testing.T, opt bool) { |
| oldopt := SetOptimize(opt) |
| for i := 0; i < len(atoftests); i++ { |
| test := &atoftests[i] |
| out, err := Atof64(test.in) |
| outs := Ftoa64(out, 'g', -1) |
| if outs != test.out || !reflect.DeepEqual(err, test.err) { |
| t.Errorf("Atof64(%v) = %v, %v want %v, %v", |
| test.in, out, err, test.out, test.err) |
| } |
| |
| out, err = AtofN(test.in, 64) |
| outs = FtoaN(out, 'g', -1, 64) |
| if outs != test.out || !reflect.DeepEqual(err, test.err) { |
| t.Errorf("AtofN(%v, 64) = %v, %v want %v, %v", |
| test.in, out, err, test.out, test.err) |
| } |
| |
| if float64(float32(out)) == out { |
| out32, err := Atof32(test.in) |
| outs := Ftoa32(out32, 'g', -1) |
| if outs != test.out || !reflect.DeepEqual(err, test.err) { |
| t.Errorf("Atof32(%v) = %v, %v want %v, %v # %v", |
| test.in, out32, err, test.out, test.err, out) |
| } |
| |
| out, err := AtofN(test.in, 32) |
| out32 = float32(out) |
| outs = FtoaN(float64(out32), 'g', -1, 32) |
| if outs != test.out || !reflect.DeepEqual(err, test.err) { |
| t.Errorf("AtofN(%v, 32) = %v, %v want %v, %v # %v", |
| test.in, out32, err, test.out, test.err, out) |
| } |
| } |
| |
| if FloatSize == 64 || float64(float32(out)) == out { |
| outf, err := Atof(test.in) |
| outs := Ftoa(outf, 'g', -1) |
| if outs != test.out || !reflect.DeepEqual(err, test.err) { |
| t.Errorf("Ftoa(%v) = %v, %v want %v, %v # %v", |
| test.in, outf, err, test.out, test.err, out) |
| } |
| } |
| } |
| SetOptimize(oldopt) |
| } |
| |
| func TestAtof(t *testing.T) { testAtof(t, true) } |
| |
| func TestAtofSlow(t *testing.T) { testAtof(t, false) } |
| |
| func BenchmarkAtofDecimal(b *testing.B) { |
| for i := 0; i < b.N; i++ { |
| Atof("33909") |
| } |
| } |
| |
| func BenchmarkAtofFloat(b *testing.B) { |
| for i := 0; i < b.N; i++ { |
| Atof("339.7784") |
| } |
| } |
| |
| func BenchmarkAtofFloatExp(b *testing.B) { |
| for i := 0; i < b.N; i++ { |
| Atof("-5.09e75") |
| } |
| } |
| |
| func BenchmarkAtofBig(b *testing.B) { |
| for i := 0; i < b.N; i++ { |
| Atof("123456789123456789123456789") |
| } |
| } |