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Merge pull request #499 from benjaminbollen/release-0.16-remove-tende…
…rmint-common Cleanup: introduce word256 and remove dependency on tendermint/go-common
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| // Copyright 2015-2017 Monax Industries Limited. | ||
| // This file is part of the Monax platform (Monax) | ||
|
|
||
| // Monax is free software: you can use, redistribute it and/or modify | ||
| // it only under the terms of the GNU General Public License, version | ||
| // 3, as published by the Free Software Foundation. | ||
|
|
||
| // Monax is distributed WITHOUT ANY WARRANTY pursuant to | ||
| // the terms of the Gnu General Public Licence, version 3, including | ||
| // (but not limited to) Clause 15 thereof. See the text of the | ||
| // GNU General Public License, version 3 for full terms. | ||
|
|
||
| // You should have received a copy of the GNU General Public License, | ||
| // version 3, with Monax. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package random | ||
|
|
||
| import ( | ||
| crand "crypto/rand" | ||
| "math/rand" | ||
| "time" | ||
|
|
||
| "github.com/eris-ltd/eris-db/common/sanity" | ||
| ) | ||
|
|
||
| const ( | ||
| strChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" // 62 characters | ||
| ) | ||
|
|
||
| func init() { | ||
| b := cRandBytes(8) | ||
| var seed uint64 | ||
| for i := 0; i < 8; i++ { | ||
| seed |= uint64(b[i]) | ||
| seed <<= 8 | ||
| } | ||
| rand.Seed(int64(seed)) | ||
| } | ||
|
|
||
| // Constructs an alphanumeric string of given length. | ||
| func RandStr(length int) string { | ||
| chars := []byte{} | ||
| MAIN_LOOP: | ||
| for { | ||
| val := rand.Int63() | ||
| for i := 0; i < 10; i++ { | ||
| v := int(val & 0x3f) // rightmost 6 bits | ||
| if v >= 62 { // only 62 characters in strChars | ||
| val >>= 6 | ||
| continue | ||
| } else { | ||
| chars = append(chars, strChars[v]) | ||
| if len(chars) == length { | ||
| break MAIN_LOOP | ||
| } | ||
| val >>= 6 | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return string(chars) | ||
| } | ||
|
|
||
| func RandUint16() uint16 { | ||
| return uint16(rand.Uint32() & (1<<16 - 1)) | ||
| } | ||
|
|
||
| func RandUint32() uint32 { | ||
| return rand.Uint32() | ||
| } | ||
|
|
||
| func RandUint64() uint64 { | ||
| return uint64(rand.Uint32())<<32 + uint64(rand.Uint32()) | ||
| } | ||
|
|
||
| func RandUint() uint { | ||
| return uint(rand.Int()) | ||
| } | ||
|
|
||
| func RandInt16() int16 { | ||
| return int16(rand.Uint32() & (1<<16 - 1)) | ||
| } | ||
|
|
||
| func RandInt32() int32 { | ||
| return int32(rand.Uint32()) | ||
| } | ||
|
|
||
| func RandInt64() int64 { | ||
| return int64(rand.Uint32())<<32 + int64(rand.Uint32()) | ||
| } | ||
|
|
||
| func RandInt() int { | ||
| return rand.Int() | ||
| } | ||
|
|
||
| // Distributed pseudo-exponentially to test for various cases | ||
| func RandUint16Exp() uint16 { | ||
| bits := rand.Uint32() % 16 | ||
| if bits == 0 { | ||
| return 0 | ||
| } | ||
| n := uint16(1 << (bits - 1)) | ||
| n += uint16(rand.Int31()) & ((1 << (bits - 1)) - 1) | ||
| return n | ||
| } | ||
|
|
||
| // Distributed pseudo-exponentially to test for various cases | ||
| func RandUint32Exp() uint32 { | ||
| bits := rand.Uint32() % 32 | ||
| if bits == 0 { | ||
| return 0 | ||
| } | ||
| n := uint32(1 << (bits - 1)) | ||
| n += uint32(rand.Int31()) & ((1 << (bits - 1)) - 1) | ||
| return n | ||
| } | ||
|
|
||
| // Distributed pseudo-exponentially to test for various cases | ||
| func RandUint64Exp() uint64 { | ||
| bits := rand.Uint32() % 64 | ||
| if bits == 0 { | ||
| return 0 | ||
| } | ||
| n := uint64(1 << (bits - 1)) | ||
| n += uint64(rand.Int63()) & ((1 << (bits - 1)) - 1) | ||
| return n | ||
| } | ||
|
|
||
| func RandFloat32() float32 { | ||
| return rand.Float32() | ||
| } | ||
|
|
||
| func RandTime() time.Time { | ||
| return time.Unix(int64(RandUint64Exp()), 0) | ||
| } | ||
|
|
||
| func RandBytes(n int) []byte { | ||
| bs := make([]byte, n) | ||
| for i := 0; i < n; i++ { | ||
| bs[i] = byte(rand.Intn(256)) | ||
| } | ||
| return bs | ||
| } | ||
|
|
||
| // NOTE: This relies on the os's random number generator. | ||
| // For real security, we should salt that with some seed. | ||
| // See github.com/tendermint/go-crypto for a more secure reader. | ||
| func cRandBytes(numBytes int) []byte { | ||
| b := make([]byte, numBytes) | ||
| _, err := crand.Read(b) | ||
| if err != nil { | ||
| sanity.PanicCrisis(err) | ||
| } | ||
| return b | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| // Copyright 2015-2017 Monax Industries Limited. | ||
| // This file is part of the Monax platform (Monax) | ||
|
|
||
| // Monax is free software: you can use, redistribute it and/or modify | ||
| // it only under the terms of the GNU General Public License, version | ||
| // 3, as published by the Free Software Foundation. | ||
|
|
||
| // Monax is distributed WITHOUT ANY WARRANTY pursuant to | ||
| // the terms of the Gnu General Public Licence, version 3, including | ||
| // (but not limited to) Clause 15 thereof. See the text of the | ||
| // GNU General Public License, version 3 for full terms. | ||
|
|
||
| // You should have received a copy of the GNU General Public License, | ||
| // version 3, with Monax. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package sanity | ||
|
|
||
| import ( | ||
| "fmt" | ||
| ) | ||
|
|
||
| //-------------------------------------------------------------------------------------------------- | ||
| // panic wrappers | ||
| // NOTE: [ben] Fail fast and fail hard, these are wrappers that point to code that needs | ||
| // to be addressed, but simplify finding them in the code; | ||
|
|
||
| // A panic resulting from a sanity check means there is a programmer error | ||
| // and some gaurantee is not satisfied. | ||
| func PanicSanity(v interface{}) { | ||
| panic(fmt.Sprintf("Paniced on a Sanity Check: %v", v)) | ||
| } | ||
|
|
||
| // A panic here means something has gone horribly wrong, in the form of data corruption or | ||
| // failure of the operating system. In a correct/healthy system, these should never fire. | ||
| // If they do, it's indicative of a much more serious problem. | ||
| func PanicCrisis(v interface{}) { | ||
| panic(fmt.Sprintf("Paniced on a Crisis: %v", v)) | ||
| } | ||
|
|
||
| // Indicates a failure of consensus. Someone was malicious or something has | ||
| // gone horribly wrong. These should really boot us into an "emergency-recover" mode | ||
| func PanicConsensus(v interface{}) { | ||
| panic(fmt.Sprintf("Paniced on a Consensus Failure: %v", v)) | ||
| } | ||
|
|
||
| // For those times when we're not sure if we should panic | ||
| func PanicQ(v interface{}) { | ||
| panic(fmt.Sprintf("Paniced questionably: %v", v)) | ||
| } |
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