| // 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 crc32 |
| |
| import ( |
| "io" |
| "testing" |
| ) |
| |
| type _Crc32Test struct { |
| out uint32 |
| in string |
| } |
| |
| var golden = []_Crc32Test{ |
| _Crc32Test{0x0, ""}, |
| _Crc32Test{0xe8b7be43, "a"}, |
| _Crc32Test{0x9e83486d, "ab"}, |
| _Crc32Test{0x352441c2, "abc"}, |
| _Crc32Test{0xed82cd11, "abcd"}, |
| _Crc32Test{0x8587d865, "abcde"}, |
| _Crc32Test{0x4b8e39ef, "abcdef"}, |
| _Crc32Test{0x312a6aa6, "abcdefg"}, |
| _Crc32Test{0xaeef2a50, "abcdefgh"}, |
| _Crc32Test{0x8da988af, "abcdefghi"}, |
| _Crc32Test{0x3981703a, "abcdefghij"}, |
| _Crc32Test{0x6b9cdfe7, "Discard medicine more than two years old."}, |
| _Crc32Test{0xc90ef73f, "He who has a shady past knows that nice guys finish last."}, |
| _Crc32Test{0xb902341f, "I wouldn't marry him with a ten foot pole."}, |
| _Crc32Test{0x42080e8, "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"}, |
| _Crc32Test{0x154c6d11, "The days of the digital watch are numbered. -Tom Stoppard"}, |
| _Crc32Test{0x4c418325, "Nepal premier won't resign."}, |
| _Crc32Test{0x33955150, "For every action there is an equal and opposite government program."}, |
| _Crc32Test{0x26216a4b, "His money is twice tainted: 'taint yours and 'taint mine."}, |
| _Crc32Test{0x1abbe45e, "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"}, |
| _Crc32Test{0xc89a94f7, "It's a tiny change to the code and not completely disgusting. - Bob Manchek"}, |
| _Crc32Test{0xab3abe14, "size: a.out: bad magic"}, |
| _Crc32Test{0xbab102b6, "The major problem is with sendmail. -Mark Horton"}, |
| _Crc32Test{0x999149d7, "Give me a rock, paper and scissors and I will move the world. CCFestoon"}, |
| _Crc32Test{0x6d52a33c, "If the enemy is within range, then so are you."}, |
| _Crc32Test{0x90631e8d, "It's well we cannot hear the screams/That we create in others' dreams."}, |
| _Crc32Test{0x78309130, "You remind me of a TV show, but that's all right: I watch it anyway."}, |
| _Crc32Test{0x7d0a377f, "C is as portable as Stonehedge!!"}, |
| _Crc32Test{0x8c79fd79, "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"}, |
| _Crc32Test{0xa20b7167, "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction. Lewis-Randall Rule"}, |
| _Crc32Test{0x8e0bb443, "How can you write a big system without C++? -Paul Glick"}, |
| } |
| |
| func TestGolden(t *testing.T) { |
| for i := 0; i < len(golden); i++ { |
| g := golden[i] |
| c := NewIEEE() |
| io.WriteString(c, g.in) |
| s := c.Sum32() |
| if s != g.out { |
| t.Errorf("crc32(%s) = 0x%x want 0x%x", g.in, s, g.out) |
| t.FailNow() |
| } |
| } |
| } |
| |
| func BenchmarkCrc32KB(b *testing.B) { |
| b.StopTimer() |
| data := make([]uint8, 1024) |
| for i := 0; i < 1024; i++ { |
| data[i] = uint8(i) |
| } |
| c := NewIEEE() |
| b.StartTimer() |
| |
| for i := 0; i < b.N; i++ { |
| c.Write(data) |
| } |
| } |