phares3757/gatus
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

#136: Start working on database persistence

Browse Source
This commit is contained in:
TwinProduction
2021-07-12 00:56:30 -04:00
committed by Chris
parent e6335da94f
commit bd1eb7c61b
657 changed files with 2190821 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
vendor/lukechampine.com/uint128/LICENSE generated vendored Normal file
View File

@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2019 Luke Champine
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

46
vendor/lukechampine.com/uint128/README.md generated vendored Normal file
View File

@ -0,0 +1,46 @@
uint128
-------
[![GoDoc](https://godoc.org/github.com/lukechampine/uint128?status.svg)](https://godoc.org/github.com/lukechampine/uint128)
[![Go Report Card](http://goreportcard.com/badge/github.com/lukechampine/uint128)](https://goreportcard.com/report/github.com/lukechampine/uint128)
```
go get lukechampine.com/uint128
```
`uint128` provides a high-performance `Uint128` type that supports standard arithmetic
operations. Unlike `math/big`, operations on `Uint128` values always produce new values
instead of modifying a pointer receiver. A `Uint128` value is therefore immutable, just
like `uint64` and friends.
The name `uint128.Uint128` stutters, so I recommend either using a "dot import"
or aliasing `uint128.Uint128` to give it a project-specific name. Embedding the type
is not recommended, because methods will still return `uint128.Uint128`; this means that,
if you want to extend the type with new methods, your best bet is probably to copy the
source code wholesale and rename the identifier. ¯\\\_(ツ)\_/¯
# Benchmarks
Addition, multiplication, and subtraction are on par with their native 64-bit
equivalents. Division is slower: ~20x slower when dividing a `Uint128` by a
`uint64`, and ~100x slower when dividing by a `Uint128`. However, division is
still faster than with `big.Int` (for the same operands), especially when
dividing by a `uint64`.
```
BenchmarkArithmetic/Add-4 2000000000 0.45 ns/op 0 B/op 0 allocs/op
BenchmarkArithmetic/Sub-4 2000000000 0.67 ns/op 0 B/op 0 allocs/op
BenchmarkArithmetic/Mul-4 2000000000 0.42 ns/op 0 B/op 0 allocs/op
BenchmarkArithmetic/Lsh-4 2000000000 1.06 ns/op 0 B/op 0 allocs/op
BenchmarkArithmetic/Rsh-4 2000000000 1.06 ns/op 0 B/op 0 allocs/op
BenchmarkDivision/native_64/64-4 2000000000 0.39 ns/op 0 B/op 0 allocs/op
BenchmarkDivision/Div_128/64-4 2000000000 6.28 ns/op 0 B/op 0 allocs/op
BenchmarkDivision/Div_128/128-4 30000000 45.2 ns/op 0 B/op 0 allocs/op
BenchmarkDivision/big.Int_128/64-4 20000000 98.2 ns/op 8 B/op 1 allocs/op
BenchmarkDivision/big.Int_128/128-4 30000000 53.4 ns/op 48 B/op 1 allocs/op
BenchmarkString/Uint128-4 10000000 173 ns/op 48 B/op 1 allocs/op
BenchmarkString/big.Int-4 5000000 350 ns/op 144 B/op 3 allocs/op
```

3
vendor/lukechampine.com/uint128/go.mod generated vendored Normal file
View File

@ -0,0 +1,3 @@
module lukechampine.com/uint128
go 1.12

417
vendor/lukechampine.com/uint128/uint128.go generated vendored Normal file
View File

@ -0,0 +1,417 @@
package uint128 // import "lukechampine.com/uint128"
import (
"encoding/binary"
"math"
"math/big"
"math/bits"
)
// Zero is a zero-valued uint128.
var Zero Uint128
// Max is the largest possible uint128 value.
var Max = New(math.MaxUint64, math.MaxUint64)
// A Uint128 is an unsigned 128-bit number.
type Uint128 struct {
Lo, Hi uint64
}
// IsZero returns true if u == 0.
func (u Uint128) IsZero() bool {
// NOTE: we do not compare against Zero, because that is a global variable
// that could be modified.
return u == Uint128{}
}
// Equals returns true if u == v.
//
// Uint128 values can be compared directly with ==, but use of the Equals method
// is preferred for consistency.
func (u Uint128) Equals(v Uint128) bool {
return u == v
}
// Equals64 returns true if u == v.
func (u Uint128) Equals64(v uint64) bool {
return u.Lo == v && u.Hi == 0
}
// Cmp compares u and v and returns:
//
// -1 if u < v
// 0 if u == v
// +1 if u > v
//
func (u Uint128) Cmp(v Uint128) int {
if u == v {
return 0
} else if u.Hi < v.Hi || (u.Hi == v.Hi && u.Lo < v.Lo) {
return -1
} else {
return 1
}
}
// Cmp64 compares u and v and returns:
//
// -1 if u < v
// 0 if u == v
// +1 if u > v
//
func (u Uint128) Cmp64(v uint64) int {
if u.Hi == 0 && u.Lo == v {
return 0
} else if u.Hi == 0 && u.Lo < v {
return -1
} else {
return 1
}
}
// And returns u&v.
func (u Uint128) And(v Uint128) Uint128 {
return Uint128{u.Lo & v.Lo, u.Hi & v.Hi}
}
// And64 returns u&v.
func (u Uint128) And64(v uint64) Uint128 {
return Uint128{u.Lo & v, u.Hi & 0}
}
// Or returns u|v.
func (u Uint128) Or(v Uint128) Uint128 {
return Uint128{u.Lo | v.Lo, u.Hi | v.Hi}
}
// Or64 returns u|v.
func (u Uint128) Or64(v uint64) Uint128 {
return Uint128{u.Lo | v, u.Hi | 0}
}
// Xor returns u^v.
func (u Uint128) Xor(v Uint128) Uint128 {
return Uint128{u.Lo ^ v.Lo, u.Hi ^ v.Hi}
}
// Xor64 returns u^v.
func (u Uint128) Xor64(v uint64) Uint128 {
return Uint128{u.Lo ^ v, u.Hi ^ 0}
}
// Add returns u+v.
func (u Uint128) Add(v Uint128) Uint128 {
lo, carry := bits.Add64(u.Lo, v.Lo, 0)
hi, carry := bits.Add64(u.Hi, v.Hi, carry)
if carry != 0 {
panic("overflow")
}
return Uint128{lo, hi}
}
// AddWrap returns u+v with wraparound semantics; for example,
// Max.AddWrap(From64(1)) == Zero.
func (u Uint128) AddWrap(v Uint128) Uint128 {
lo, carry := bits.Add64(u.Lo, v.Lo, 0)
hi, _ := bits.Add64(u.Hi, v.Hi, carry)
return Uint128{lo, hi}
}
// Add64 returns u+v.
func (u Uint128) Add64(v uint64) Uint128 {
lo, carry := bits.Add64(u.Lo, v, 0)
hi, carry := bits.Add64(u.Hi, 0, carry)
if carry != 0 {
panic("overflow")
}
return Uint128{lo, hi}
}
// AddWrap64 returns u+v with wraparound semantics; for example,
// Max.AddWrap64(1) == Zero.
func (u Uint128) AddWrap64(v uint64) Uint128 {
lo, carry := bits.Add64(u.Lo, v, 0)
hi := u.Hi + carry
return Uint128{lo, hi}
}
// Sub returns u-v.
func (u Uint128) Sub(v Uint128) Uint128 {
lo, borrow := bits.Sub64(u.Lo, v.Lo, 0)
hi, borrow := bits.Sub64(u.Hi, v.Hi, borrow)
if borrow != 0 {
panic("underflow")
}
return Uint128{lo, hi}
}
// SubWrap returns u-v with wraparound semantics; for example,
// Zero.SubWrap(From64(1)) == Max.
func (u Uint128) SubWrap(v Uint128) Uint128 {
lo, borrow := bits.Sub64(u.Lo, v.Lo, 0)
hi, _ := bits.Sub64(u.Hi, v.Hi, borrow)
return Uint128{lo, hi}
}
// Sub64 returns u-v.
func (u Uint128) Sub64(v uint64) Uint128 {
lo, borrow := bits.Sub64(u.Lo, v, 0)
hi, borrow := bits.Sub64(u.Hi, 0, borrow)
if borrow != 0 {
panic("underflow")
}
return Uint128{lo, hi}
}
// SubWrap64 returns u-v with wraparound semantics; for example,
// Zero.SubWrap64(1) == Max.
func (u Uint128) SubWrap64(v uint64) Uint128 {
lo, borrow := bits.Sub64(u.Lo, v, 0)
hi := u.Hi - borrow
return Uint128{lo, hi}
}
// Mul returns u*v, panicking on overflow.
func (u Uint128) Mul(v Uint128) Uint128 {
hi, lo := bits.Mul64(u.Lo, v.Lo)
p0, p1 := bits.Mul64(u.Hi, v.Lo)
p2, p3 := bits.Mul64(u.Lo, v.Hi)
hi, c0 := bits.Add64(hi, p1, 0)
hi, c1 := bits.Add64(hi, p3, c0)
if (u.Hi != 0 && v.Hi != 0) || p0 != 0 || p2 != 0 || c1 != 0 {
panic("overflow")
}
return Uint128{lo, hi}
}
// MulWrap returns u*v with wraparound semantics; for example,
// Max.MulWrap(Max) == 1.
func (u Uint128) MulWrap(v Uint128) Uint128 {
hi, lo := bits.Mul64(u.Lo, v.Lo)
hi += u.Hi*v.Lo + u.Lo*v.Hi
return Uint128{lo, hi}
}
// Mul64 returns u*v, panicking on overflow.
func (u Uint128) Mul64(v uint64) Uint128 {
hi, lo := bits.Mul64(u.Lo, v)
p0, p1 := bits.Mul64(u.Hi, v)
hi, c0 := bits.Add64(hi, p1, 0)
if p0 != 0 || c0 != 0 {
panic("overflow")
}
return Uint128{lo, hi}
}
// MulWrap64 returns u*v with wraparound semantics; for example,
// Max.MulWrap64(2) == Max.Sub64(1).
func (u Uint128) MulWrap64(v uint64) Uint128 {
hi, lo := bits.Mul64(u.Lo, v)
hi += u.Hi * v
return Uint128{lo, hi}
}
// Div returns u/v.
func (u Uint128) Div(v Uint128) Uint128 {
q, _ := u.QuoRem(v)
return q
}
// Div64 returns u/v.
func (u Uint128) Div64(v uint64) Uint128 {
q, _ := u.QuoRem64(v)
return q
}
// QuoRem returns q = u/v and r = u%v.
func (u Uint128) QuoRem(v Uint128) (q, r Uint128) {
if v.Hi == 0 {
var r64 uint64
q, r64 = u.QuoRem64(v.Lo)
r = From64(r64)
} else {
// generate a "trial quotient," guaranteed to be within 1 of the actual
// quotient, then adjust.
n := uint(bits.LeadingZeros64(v.Hi))
v1 := v.Lsh(n)
u1 := u.Rsh(1)
tq, _ := bits.Div64(u1.Hi, u1.Lo, v1.Hi)
tq >>= 63 - n
if tq != 0 {
tq--
}
q = From64(tq)
// calculate remainder using trial quotient, then adjust if remainder is
// greater than divisor
r = u.Sub(v.Mul64(tq))
if r.Cmp(v) >= 0 {
q = q.Add64(1)
r = r.Sub(v)
}
}
return
}
// QuoRem64 returns q = u/v and r = u%v.
func (u Uint128) QuoRem64(v uint64) (q Uint128, r uint64) {
if u.Hi < v {
q.Lo, r = bits.Div64(u.Hi, u.Lo, v)
} else {
q.Hi, r = bits.Div64(0, u.Hi, v)
q.Lo, r = bits.Div64(r, u.Lo, v)
}
return
}
// Mod returns r = u%v.
func (u Uint128) Mod(v Uint128) (r Uint128) {
_, r = u.QuoRem(v)
return
}
// Mod64 returns r = u%v.
func (u Uint128) Mod64(v uint64) (r uint64) {
_, r = u.QuoRem64(v)
return
}
// Lsh returns u<<n.
func (u Uint128) Lsh(n uint) (s Uint128) {
if n > 64 {
s.Lo = 0
s.Hi = u.Lo << (n - 64)
} else {
s.Lo = u.Lo << n
s.Hi = u.Hi<<n | u.Lo>>(64-n)
}
return
}
// Rsh returns u>>n.
func (u Uint128) Rsh(n uint) (s Uint128) {
if n > 64 {
s.Lo = u.Hi >> (n - 64)
s.Hi = 0
} else {
s.Lo = u.Lo>>n | u.Hi<<(64-n)
s.Hi = u.Hi >> n
}
return
}
// LeadingZeros returns the number of leading zero bits in u; the result is 128
// for u == 0.
func (u Uint128) LeadingZeros() int {
if u.Hi > 0 {
return bits.LeadingZeros64(u.Hi)
}
return 64 + bits.LeadingZeros64(u.Lo)
}
// TrailingZeros returns the number of trailing zero bits in u; the result is
// 128 for u == 0.
func (u Uint128) TrailingZeros() int {
if u.Lo > 0 {
return bits.TrailingZeros64(u.Lo)
}
return 64 + bits.TrailingZeros64(u.Hi)
}
// OnesCount returns the number of one bits ("population count") in u.
func (u Uint128) OnesCount() int {
return bits.OnesCount64(u.Hi) + bits.OnesCount64(u.Lo)
}
// RotateLeft returns the value of u rotated left by (k mod 128) bits.
func (u Uint128) RotateLeft(k int) Uint128 {
const n = 128
s := uint(k) & (n - 1)
return u.Lsh(s).Or(u.Rsh(n - s))
}
// RotateRight returns the value of u rotated left by (k mod 128) bits.
func (u Uint128) RotateRight(k int) Uint128 {
return u.RotateLeft(-k)
}
// Reverse returns the value of u with its bits in reversed order.
func (u Uint128) Reverse() Uint128 {
return Uint128{bits.Reverse64(u.Hi), bits.Reverse64(u.Lo)}
}
// ReverseBytes returns the value of u with its bytes in reversed order.
func (u Uint128) ReverseBytes() Uint128 {
return Uint128{bits.ReverseBytes64(u.Hi), bits.ReverseBytes64(u.Lo)}
}
// Len returns the minimum number of bits required to represent u; the result is
// 0 for u == 0.
func (u Uint128) Len() int {
return 128 - u.LeadingZeros()
}
// String returns the base-10 representation of u as a string.
func (u Uint128) String() string {
if u.IsZero() {
return "0"
}
buf := []byte("0000000000000000000000000000000000000000") // log10(2^128) < 40
for i := len(buf); ; i -= 19 {
q, r := u.QuoRem64(1e19) // largest power of 10 that fits in a uint64
var n int
for ; r != 0; r /= 10 {
n++
buf[i-n] += byte(r % 10)
}
if q.IsZero() {
return string(buf[i-n:])
}
u = q
}
}
// PutBytes stores u in b in little-endian order. It panics if len(b) < 16.
func (u Uint128) PutBytes(b []byte) {
binary.LittleEndian.PutUint64(b[:8], u.Lo)
binary.LittleEndian.PutUint64(b[8:], u.Hi)
}
// Big returns u as a *big.Int.
func (u Uint128) Big() *big.Int {
i := new(big.Int).SetUint64(u.Hi)
i = i.Lsh(i, 64)
i = i.Xor(i, new(big.Int).SetUint64(u.Lo))
return i
}
// New returns the Uint128 value (lo,hi).
func New(lo, hi uint64) Uint128 {
return Uint128{lo, hi}
}
// From64 converts v to a Uint128 value.
func From64(v uint64) Uint128 {
return New(v, 0)
}
// FromBytes converts b to a Uint128 value.
func FromBytes(b []byte) Uint128 {
return New(
binary.LittleEndian.Uint64(b[:8]),
binary.LittleEndian.Uint64(b[8:]),
)
}
// FromBig converts i to a Uint128 value. It panics if i is negative or
// overflows 128 bits.
func FromBig(i *big.Int) (u Uint128) {
if i.Sign() < 0 {
panic("value cannot be negative")
} else if i.BitLen() > 128 {
panic("value overflows Uint128")
}
u.Lo = i.Uint64()
u.Hi = new(big.Int).Rsh(i, 64).Uint64()
return u
}