diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/strconv/atof_test.go')
| -rw-r--r-- | gcc-4.8.1/libgo/go/strconv/atof_test.go | 429 |
1 files changed, 0 insertions, 429 deletions
diff --git a/gcc-4.8.1/libgo/go/strconv/atof_test.go b/gcc-4.8.1/libgo/go/strconv/atof_test.go deleted file mode 100644 index b4f3a6f08..000000000 --- a/gcc-4.8.1/libgo/go/strconv/atof_test.go +++ /dev/null @@ -1,429 +0,0 @@ -// 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 ( - "math" - "math/rand" - "reflect" - . "strconv" - "strings" - "testing" - "time" -) - -type atofTest struct { - in string - out string - err error -} - -var atoftests = []atofTest{ - {"", "0", ErrSyntax}, - {"1", "1", nil}, - {"+1", "1", nil}, - {"1x", "0", ErrSyntax}, - {"1.1.", "0", ErrSyntax}, - {"1e23", "1e+23", nil}, - {"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}, - {"-0.1", "-0.1", 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}, - {"-Infinity", "-Inf", nil}, - {"+INFINITY", "+Inf", nil}, - {"Infinity", "+Inf", nil}, - - // largest float64 - {"1.7976931348623157e308", "1.7976931348623157e+308", nil}, - {"-1.7976931348623157e308", "-1.7976931348623157e+308", nil}, - // next float64 - too large - {"1.7976931348623159e308", "+Inf", ErrRange}, - {"-1.7976931348623159e308", "-Inf", ErrRange}, - // the border is ...158079 - // borderline - okay - {"1.7976931348623158e308", "1.7976931348623157e+308", nil}, - {"-1.7976931348623158e308", "-1.7976931348623157e+308", nil}, - // borderline - too large - {"1.797693134862315808e308", "+Inf", ErrRange}, - {"-1.797693134862315808e308", "-Inf", ErrRange}, - - // a little too large - {"1e308", "1e+308", nil}, - {"2e308", "+Inf", ErrRange}, - {"1e309", "+Inf", ErrRange}, - - // way too large - {"1e310", "+Inf", ErrRange}, - {"-1e310", "-Inf", ErrRange}, - {"1e400", "+Inf", ErrRange}, - {"-1e400", "-Inf", ErrRange}, - {"1e400000", "+Inf", ErrRange}, - {"-1e400000", "-Inf", ErrRange}, - - // 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", ErrRange}, - {"1e-18446744073709551616", "0", nil}, - {"1e+18446744073709551616", "+Inf", ErrRange}, - - // Parse errors - {"1e", "0", ErrSyntax}, - {"1e-", "0", ErrSyntax}, - {".e-1", "0", ErrSyntax}, - - // http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/ - {"2.2250738585072012e-308", "2.2250738585072014e-308", nil}, - // http://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/ - {"2.2250738585072011e-308", "2.225073858507201e-308", nil}, - - // A very large number (initially wrongly parsed by the fast algorithm). - {"4.630813248087435e+307", "4.630813248087435e+307", nil}, - - // A different kind of very large number. - {"22.222222222222222", "22.22222222222222", nil}, - {"2." + strings.Repeat("2", 4000) + "e+1", "22.22222222222222", nil}, - - // Exactly halfway between 1 and math.Nextafter(1, 2). - // Round to even (down). - {"1.00000000000000011102230246251565404236316680908203125", "1", nil}, - // Slightly lower; still round down. - {"1.00000000000000011102230246251565404236316680908203124", "1", nil}, - // Slightly higher; round up. - {"1.00000000000000011102230246251565404236316680908203126", "1.0000000000000002", nil}, - // Slightly higher, but you have to read all the way to the end. - {"1.00000000000000011102230246251565404236316680908203125" + strings.Repeat("0", 10000) + "1", "1.0000000000000002", nil}, -} - -var atof32tests = []atofTest{ - // Exactly halfway between 1 and the next float32. - // Round to even (down). - {"1.000000059604644775390625", "1", nil}, - // Slightly lower. - {"1.000000059604644775390624", "1", nil}, - // Slightly higher. - {"1.000000059604644775390626", "1.0000001", nil}, - // Slightly higher, but you have to read all the way to the end. - {"1.000000059604644775390625" + strings.Repeat("0", 10000) + "1", "1.0000001", nil}, - - // largest float32: (1<<128) * (1 - 2^-24) - {"340282346638528859811704183484516925440", "3.4028235e+38", nil}, - {"-340282346638528859811704183484516925440", "-3.4028235e+38", nil}, - // next float32 - too large - {"3.4028236e38", "+Inf", ErrRange}, - {"-3.4028236e38", "-Inf", ErrRange}, - // the border is 3.40282356779...e+38 - // borderline - okay - {"3.402823567e38", "3.4028235e+38", nil}, - {"-3.402823567e38", "-3.4028235e+38", nil}, - // borderline - too large - {"3.4028235678e38", "+Inf", ErrRange}, - {"-3.4028235678e38", "-Inf", ErrRange}, - - // Denormals: less than 2^-126 - {"1e-38", "1e-38", nil}, - {"1e-39", "1e-39", nil}, - {"1e-40", "1e-40", nil}, - {"1e-41", "1e-41", nil}, - {"1e-42", "1e-42", nil}, - {"1e-43", "1e-43", nil}, - {"1e-44", "1e-44", nil}, - {"6e-45", "6e-45", nil}, // 4p-149 = 5.6e-45 - {"5e-45", "6e-45", nil}, - // Smallest denormal - {"1e-45", "1e-45", nil}, // 1p-149 = 1.4e-45 - {"2e-45", "1e-45", nil}, - - // 2^92 = 8388608p+69 = 4951760157141521099596496896 (4.9517602e27) - // is an exact power of two that needs 8 decimal digits to be correctly - // parsed back. - // The float32 before is 16777215p+68 = 4.95175986e+27 - // The halfway is 4.951760009. A bad algorithm that thinks the previous - // float32 is 8388607p+69 will shorten incorrectly to 4.95176e+27. - {"4951760157141521099596496896", "4.9517602e+27", nil}, -} - -type atofSimpleTest struct { - x float64 - s string -} - -var ( - atofRandomTests []atofSimpleTest - benchmarksRandomBits [1024]string - benchmarksRandomNormal [1024]string -) - -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{"ParseFloat", test.in, test.err} - } - } - for i := range atof32tests { - test := &atof32tests[i] - if test.err != nil { - test.err = &NumError{"ParseFloat", test.in, test.err} - } - } - - // Generate random inputs for tests and benchmarks - rand.Seed(time.Now().UnixNano()) - if testing.Short() { - atofRandomTests = make([]atofSimpleTest, 100) - } else { - atofRandomTests = make([]atofSimpleTest, 10000) - } - for i := range atofRandomTests { - n := uint64(rand.Uint32())<<32 | uint64(rand.Uint32()) - x := math.Float64frombits(n) - s := FormatFloat(x, 'g', -1, 64) - atofRandomTests[i] = atofSimpleTest{x, s} - } - - for i := range benchmarksRandomBits { - bits := uint64(rand.Uint32())<<32 | uint64(rand.Uint32()) - x := math.Float64frombits(bits) - benchmarksRandomBits[i] = FormatFloat(x, 'g', -1, 64) - } - - for i := range benchmarksRandomNormal { - x := rand.NormFloat64() - benchmarksRandomNormal[i] = FormatFloat(x, 'g', -1, 64) - } -} - -func testAtof(t *testing.T, opt bool) { - oldopt := SetOptimize(opt) - for i := 0; i < len(atoftests); i++ { - test := &atoftests[i] - out, err := ParseFloat(test.in, 64) - outs := FormatFloat(out, 'g', -1, 64) - if outs != test.out || !reflect.DeepEqual(err, test.err) { - t.Errorf("ParseFloat(%v, 64) = %v, %v want %v, %v", - test.in, out, err, test.out, test.err) - } - - if float64(float32(out)) == out { - out, err := ParseFloat(test.in, 32) - out32 := float32(out) - if float64(out32) != out { - t.Errorf("ParseFloat(%v, 32) = %v, not a float32 (closest is %v)", test.in, out, float64(out32)) - continue - } - outs := FormatFloat(float64(out32), 'g', -1, 32) - if outs != test.out || !reflect.DeepEqual(err, test.err) { - t.Errorf("ParseFloat(%v, 32) = %v, %v want %v, %v # %v", - test.in, out32, err, test.out, test.err, out) - } - } - } - for _, test := range atof32tests { - out, err := ParseFloat(test.in, 32) - out32 := float32(out) - if float64(out32) != out { - t.Errorf("ParseFloat(%v, 32) = %v, not a float32 (closest is %v)", test.in, out, float64(out32)) - continue - } - outs := FormatFloat(float64(out32), 'g', -1, 32) - if outs != test.out || !reflect.DeepEqual(err, test.err) { - t.Errorf("ParseFloat(%v, 32) = %v, %v want %v, %v # %v", - test.in, out32, 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 TestAtofRandom(t *testing.T) { - for _, test := range atofRandomTests { - x, _ := ParseFloat(test.s, 64) - switch { - default: - t.Errorf("number %s badly parsed as %b (expected %b)", test.s, x, test.x) - case x == test.x: - case math.IsNaN(test.x) && math.IsNaN(x): - } - } - t.Logf("tested %d random numbers", len(atofRandomTests)) -} - -var roundTripCases = []struct { - f float64 - s string -}{ - // Issue 2917. - // This test will break the optimized conversion if the - // FPU is using 80-bit registers instead of 64-bit registers, - // usually because the operating system initialized the - // thread with 80-bit precision and the Go runtime didn't - // fix the FP control word. - {8865794286000691 << 39, "4.87402195346389e+27"}, - {8865794286000692 << 39, "4.8740219534638903e+27"}, -} - -func TestRoundTrip(t *testing.T) { - for _, tt := range roundTripCases { - old := SetOptimize(false) - s := FormatFloat(tt.f, 'g', -1, 64) - if s != tt.s { - t.Errorf("no-opt FormatFloat(%b) = %s, want %s", tt.f, s, tt.s) - } - f, err := ParseFloat(tt.s, 64) - if f != tt.f || err != nil { - t.Errorf("no-opt ParseFloat(%s) = %b, %v want %b, nil", tt.s, f, err, tt.f) - } - SetOptimize(true) - s = FormatFloat(tt.f, 'g', -1, 64) - if s != tt.s { - t.Errorf("opt FormatFloat(%b) = %s, want %s", tt.f, s, tt.s) - } - f, err = ParseFloat(tt.s, 64) - if f != tt.f || err != nil { - t.Errorf("opt ParseFloat(%s) = %b, %v want %b, nil", tt.s, f, err, tt.f) - } - SetOptimize(old) - } -} - -// TestRoundTrip32 tries a fraction of all finite positive float32 values. -func TestRoundTrip32(t *testing.T) { - step := uint32(997) - if testing.Short() { - step = 99991 - } - count := 0 - for i := uint32(0); i < 0xff<<23; i += step { - f := math.Float32frombits(i) - if i&1 == 1 { - f = -f // negative - } - s := FormatFloat(float64(f), 'g', -1, 32) - - parsed, err := ParseFloat(s, 32) - parsed32 := float32(parsed) - switch { - case err != nil: - t.Errorf("ParseFloat(%q, 32) gave error %s", s, err) - case float64(parsed32) != parsed: - t.Errorf("ParseFloat(%q, 32) = %v, not a float32 (nearest is %v)", s, parsed, parsed32) - case parsed32 != f: - t.Errorf("ParseFloat(%q, 32) = %b (expected %b)", s, parsed32, f) - } - count++ - } - t.Logf("tested %d float32's", count) -} - -func BenchmarkAtof64Decimal(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("33909", 64) - } -} - -func BenchmarkAtof64Float(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("339.7784", 64) - } -} - -func BenchmarkAtof64FloatExp(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("-5.09e75", 64) - } -} - -func BenchmarkAtof64Big(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("123456789123456789123456789", 64) - } -} - -func BenchmarkAtof64RandomBits(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat(benchmarksRandomBits[i%1024], 64) - } -} - -func BenchmarkAtof64RandomFloats(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat(benchmarksRandomNormal[i%1024], 64) - } -} - -func BenchmarkAtof32Decimal(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("33909", 32) - } -} - -func BenchmarkAtof32Float(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("339.778", 32) - } -} - -func BenchmarkAtof32FloatExp(b *testing.B) { - for i := 0; i < b.N; i++ { - ParseFloat("12.3456e32", 32) - } -} - -var float32strings [4096]string - -func BenchmarkAtof32Random(b *testing.B) { - n := uint32(997) - for i := range float32strings { - n = (99991*n + 42) % (0xff << 23) - float32strings[i] = FormatFloat(float64(math.Float32frombits(n)), 'g', -1, 32) - } - b.ResetTimer() - for i := 0; i < b.N; i++ { - ParseFloat(float32strings[i%4096], 32) - } -} |