From fc6074ea9fba9684aaad1ab6d43a0ec23db8c5d3 Mon Sep 17 00:00:00 2001 From: Wim Date: Sun, 27 May 2018 21:48:57 +0200 Subject: Add vendor github.com/rs/xid --- vendor/github.com/rs/xid/LICENSE | 19 ++ vendor/github.com/rs/xid/hostid_darwin.go | 9 + vendor/github.com/rs/xid/hostid_fallback.go | 9 + vendor/github.com/rs/xid/hostid_freebsd.go | 9 + vendor/github.com/rs/xid/hostid_linux.go | 10 + vendor/github.com/rs/xid/hostid_windows.go | 39 +++ vendor/github.com/rs/xid/id.go | 361 ++++++++++++++++++++++++++++ 7 files changed, 456 insertions(+) create mode 100644 vendor/github.com/rs/xid/LICENSE create mode 100644 vendor/github.com/rs/xid/hostid_darwin.go create mode 100644 vendor/github.com/rs/xid/hostid_fallback.go create mode 100644 vendor/github.com/rs/xid/hostid_freebsd.go create mode 100644 vendor/github.com/rs/xid/hostid_linux.go create mode 100644 vendor/github.com/rs/xid/hostid_windows.go create mode 100644 vendor/github.com/rs/xid/id.go (limited to 'vendor/github.com/rs/xid') diff --git a/vendor/github.com/rs/xid/LICENSE b/vendor/github.com/rs/xid/LICENSE new file mode 100644 index 00000000..47c5e9d2 --- /dev/null +++ b/vendor/github.com/rs/xid/LICENSE @@ -0,0 +1,19 @@ +Copyright (c) 2015 Olivier Poitrey + +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. diff --git a/vendor/github.com/rs/xid/hostid_darwin.go b/vendor/github.com/rs/xid/hostid_darwin.go new file mode 100644 index 00000000..abd06840 --- /dev/null +++ b/vendor/github.com/rs/xid/hostid_darwin.go @@ -0,0 +1,9 @@ +// +build darwin + +package xid + +import "golang.org/x/sys/unix" + +func readPlatformMachineID() (string, error) { + return unix.Sysctl("kern.uuid") +} diff --git a/vendor/github.com/rs/xid/hostid_fallback.go b/vendor/github.com/rs/xid/hostid_fallback.go new file mode 100644 index 00000000..7fbd3c00 --- /dev/null +++ b/vendor/github.com/rs/xid/hostid_fallback.go @@ -0,0 +1,9 @@ +// +build !darwin,!linux,!freebsd,!windows + +package xid + +import "errors" + +func readPlatformMachineID() (string, error) { + return "", errors.New("not implemented") +} diff --git a/vendor/github.com/rs/xid/hostid_freebsd.go b/vendor/github.com/rs/xid/hostid_freebsd.go new file mode 100644 index 00000000..df2bd13c --- /dev/null +++ b/vendor/github.com/rs/xid/hostid_freebsd.go @@ -0,0 +1,9 @@ +// +build freebsd + +package xid + +import "golang.org/x/sys/unix" + +func readPlatformMachineID() (string, error) { + return unix.Sysctl("kern.hostuuid") +} diff --git a/vendor/github.com/rs/xid/hostid_linux.go b/vendor/github.com/rs/xid/hostid_linux.go new file mode 100644 index 00000000..7d0c4a9e --- /dev/null +++ b/vendor/github.com/rs/xid/hostid_linux.go @@ -0,0 +1,10 @@ +// +build linux + +package xid + +import "io/ioutil" + +func readPlatformMachineID() (string, error) { + b, err := ioutil.ReadFile("/sys/class/dmi/id/product_uuid") + return string(b), err +} diff --git a/vendor/github.com/rs/xid/hostid_windows.go b/vendor/github.com/rs/xid/hostid_windows.go new file mode 100644 index 00000000..b8e1c2cb --- /dev/null +++ b/vendor/github.com/rs/xid/hostid_windows.go @@ -0,0 +1,39 @@ +// +build windows + +package xid + +import ( + "fmt" + "unsafe" + + "golang.org/x/sys/windows" +) + +func readPlatformMachineID() (string, error) { + // source: https://github.com/shirou/gopsutil/blob/master/host/host_windows.go + var h windows.Handle + err := windows.RegOpenKeyEx(windows.HKEY_LOCAL_MACHINE, windows.StringToUTF16Ptr(`SOFTWARE\Microsoft\Cryptography`), 0, windows.KEY_READ|windows.KEY_WOW64_64KEY, &h) + if err != nil { + return "", err + } + defer windows.RegCloseKey(h) + + const windowsRegBufLen = 74 // len(`{`) + len(`abcdefgh-1234-456789012-123345456671` * 2) + len(`}`) // 2 == bytes/UTF16 + const uuidLen = 36 + + var regBuf [windowsRegBufLen]uint16 + bufLen := uint32(windowsRegBufLen) + var valType uint32 + err = windows.RegQueryValueEx(h, windows.StringToUTF16Ptr(`MachineGuid`), nil, &valType, (*byte)(unsafe.Pointer(®Buf[0])), &bufLen) + if err != nil { + return "", err + } + + hostID := windows.UTF16ToString(regBuf[:]) + hostIDLen := len(hostID) + if hostIDLen != uuidLen { + return "", fmt.Errorf("HostID incorrect: %q\n", hostID) + } + + return hostID, nil +} diff --git a/vendor/github.com/rs/xid/id.go b/vendor/github.com/rs/xid/id.go new file mode 100644 index 00000000..51b8d7fa --- /dev/null +++ b/vendor/github.com/rs/xid/id.go @@ -0,0 +1,361 @@ +// Package xid is a globally unique id generator suited for web scale +// +// Xid is using Mongo Object ID algorithm to generate globally unique ids: +// https://docs.mongodb.org/manual/reference/object-id/ +// +// - 4-byte value representing the seconds since the Unix epoch, +// - 3-byte machine identifier, +// - 2-byte process id, and +// - 3-byte counter, starting with a random value. +// +// The binary representation of the id is compatible with Mongo 12 bytes Object IDs. +// The string representation is using base32 hex (w/o padding) for better space efficiency +// when stored in that form (20 bytes). The hex variant of base32 is used to retain the +// sortable property of the id. +// +// Xid doesn't use base64 because case sensitivity and the 2 non alphanum chars may be an +// issue when transported as a string between various systems. Base36 wasn't retained either +// because 1/ it's not standard 2/ the resulting size is not predictable (not bit aligned) +// and 3/ it would not remain sortable. To validate a base32 `xid`, expect a 20 chars long, +// all lowercase sequence of `a` to `v` letters and `0` to `9` numbers (`[0-9a-v]{20}`). +// +// UUID is 16 bytes (128 bits), snowflake is 8 bytes (64 bits), xid stands in between +// with 12 bytes with a more compact string representation ready for the web and no +// required configuration or central generation server. +// +// Features: +// +// - Size: 12 bytes (96 bits), smaller than UUID, larger than snowflake +// - Base32 hex encoded by default (16 bytes storage when transported as printable string) +// - Non configured, you don't need set a unique machine and/or data center id +// - K-ordered +// - Embedded time with 1 second precision +// - Unicity guaranteed for 16,777,216 (24 bits) unique ids per second and per host/process +// +// Best used with xlog's RequestIDHandler (https://godoc.org/github.com/rs/xlog#RequestIDHandler). +// +// References: +// +// - http://www.slideshare.net/davegardnerisme/unique-id-generation-in-distributed-systems +// - https://en.wikipedia.org/wiki/Universally_unique_identifier +// - https://blog.twitter.com/2010/announcing-snowflake +package xid + +import ( + "crypto/md5" + "crypto/rand" + "database/sql/driver" + "encoding/binary" + "errors" + "fmt" + "hash/crc32" + "io/ioutil" + "os" + "sync/atomic" + "time" + "bytes" + "sort" +) + +// Code inspired from mgo/bson ObjectId + +// ID represents a unique request id +type ID [rawLen]byte + +const ( + encodedLen = 20 // string encoded len + rawLen = 12 // binary raw len + + // encoding stores a custom version of the base32 encoding with lower case + // letters. + encoding = "0123456789abcdefghijklmnopqrstuv" +) + +var ( + // ErrInvalidID is returned when trying to unmarshal an invalid ID + ErrInvalidID = errors.New("xid: invalid ID") + + // objectIDCounter is atomically incremented when generating a new ObjectId + // using NewObjectId() function. It's used as a counter part of an id. + // This id is initialized with a random value. + objectIDCounter = randInt() + + // machineId stores machine id generated once and used in subsequent calls + // to NewObjectId function. + machineID = readMachineID() + + // pid stores the current process id + pid = os.Getpid() + + nilID ID + + // dec is the decoding map for base32 encoding + dec [256]byte +) + +func init() { + for i := 0; i < len(dec); i++ { + dec[i] = 0xFF + } + for i := 0; i < len(encoding); i++ { + dec[encoding[i]] = byte(i) + } + + // If /proc/self/cpuset exists and is not /, we can assume that we are in a + // form of container and use the content of cpuset xor-ed with the PID in + // order get a reasonable machine global unique PID. + b, err := ioutil.ReadFile("/proc/self/cpuset") + if err == nil && len(b) > 1 { + pid ^= int(crc32.ChecksumIEEE(b)) + } +} + +// readMachineId generates machine id and puts it into the machineId global +// variable. If this function fails to get the hostname, it will cause +// a runtime error. +func readMachineID() []byte { + id := make([]byte, 3) + hid, err := readPlatformMachineID() + if err != nil || len(hid) == 0 { + hid, err = os.Hostname() + } + if err == nil && len(hid) != 0 { + hw := md5.New() + hw.Write([]byte(hid)) + copy(id, hw.Sum(nil)) + } else { + // Fallback to rand number if machine id can't be gathered + if _, randErr := rand.Reader.Read(id); randErr != nil { + panic(fmt.Errorf("xid: cannot get hostname nor generate a random number: %v; %v", err, randErr)) + } + } + return id +} + +// randInt generates a random uint32 +func randInt() uint32 { + b := make([]byte, 3) + if _, err := rand.Reader.Read(b); err != nil { + panic(fmt.Errorf("xid: cannot generate random number: %v;", err)) + } + return uint32(b[0])<<16 | uint32(b[1])<<8 | uint32(b[2]) +} + +// New generates a globally unique ID +func New() ID { + var id ID + // Timestamp, 4 bytes, big endian + binary.BigEndian.PutUint32(id[:], uint32(time.Now().Unix())) + // Machine, first 3 bytes of md5(hostname) + id[4] = machineID[0] + id[5] = machineID[1] + id[6] = machineID[2] + // Pid, 2 bytes, specs don't specify endianness, but we use big endian. + id[7] = byte(pid >> 8) + id[8] = byte(pid) + // Increment, 3 bytes, big endian + i := atomic.AddUint32(&objectIDCounter, 1) + id[9] = byte(i >> 16) + id[10] = byte(i >> 8) + id[11] = byte(i) + return id +} + +// FromString reads an ID from its string representation +func FromString(id string) (ID, error) { + i := &ID{} + err := i.UnmarshalText([]byte(id)) + return *i, err +} + +// String returns a base32 hex lowercased with no padding representation of the id (char set is 0-9, a-v). +func (id ID) String() string { + text := make([]byte, encodedLen) + encode(text, id[:]) + return string(text) +} + +// MarshalText implements encoding/text TextMarshaler interface +func (id ID) MarshalText() ([]byte, error) { + text := make([]byte, encodedLen) + encode(text, id[:]) + return text, nil +} + +// MarshalJSON implements encoding/json Marshaler interface +func (id ID) MarshalJSON() ([]byte, error) { + if id.IsNil() { + return []byte("null"), nil + } + text, err := id.MarshalText() + return []byte(`"` + string(text) + `"`), err +} + +// encode by unrolling the stdlib base32 algorithm + removing all safe checks +func encode(dst, id []byte) { + dst[0] = encoding[id[0]>>3] + dst[1] = encoding[(id[1]>>6)&0x1F|(id[0]<<2)&0x1F] + dst[2] = encoding[(id[1]>>1)&0x1F] + dst[3] = encoding[(id[2]>>4)&0x1F|(id[1]<<4)&0x1F] + dst[4] = encoding[id[3]>>7|(id[2]<<1)&0x1F] + dst[5] = encoding[(id[3]>>2)&0x1F] + dst[6] = encoding[id[4]>>5|(id[3]<<3)&0x1F] + dst[7] = encoding[id[4]&0x1F] + dst[8] = encoding[id[5]>>3] + dst[9] = encoding[(id[6]>>6)&0x1F|(id[5]<<2)&0x1F] + dst[10] = encoding[(id[6]>>1)&0x1F] + dst[11] = encoding[(id[7]>>4)&0x1F|(id[6]<<4)&0x1F] + dst[12] = encoding[id[8]>>7|(id[7]<<1)&0x1F] + dst[13] = encoding[(id[8]>>2)&0x1F] + dst[14] = encoding[(id[9]>>5)|(id[8]<<3)&0x1F] + dst[15] = encoding[id[9]&0x1F] + dst[16] = encoding[id[10]>>3] + dst[17] = encoding[(id[11]>>6)&0x1F|(id[10]<<2)&0x1F] + dst[18] = encoding[(id[11]>>1)&0x1F] + dst[19] = encoding[(id[11]<<4)&0x1F] +} + +// UnmarshalText implements encoding/text TextUnmarshaler interface +func (id *ID) UnmarshalText(text []byte) error { + if len(text) != encodedLen { + return ErrInvalidID + } + for _, c := range text { + if dec[c] == 0xFF { + return ErrInvalidID + } + } + decode(id, text) + return nil +} + +// UnmarshalJSON implements encoding/json Unmarshaler interface +func (id *ID) UnmarshalJSON(b []byte) error { + s := string(b) + if s == "null" { + *id = nilID + return nil + } + return id.UnmarshalText(b[1 : len(b)-1]) +} + +// decode by unrolling the stdlib base32 algorithm + removing all safe checks +func decode(id *ID, src []byte) { + id[0] = dec[src[0]]<<3 | dec[src[1]]>>2 + id[1] = dec[src[1]]<<6 | dec[src[2]]<<1 | dec[src[3]]>>4 + id[2] = dec[src[3]]<<4 | dec[src[4]]>>1 + id[3] = dec[src[4]]<<7 | dec[src[5]]<<2 | dec[src[6]]>>3 + id[4] = dec[src[6]]<<5 | dec[src[7]] + id[5] = dec[src[8]]<<3 | dec[src[9]]>>2 + id[6] = dec[src[9]]<<6 | dec[src[10]]<<1 | dec[src[11]]>>4 + id[7] = dec[src[11]]<<4 | dec[src[12]]>>1 + id[8] = dec[src[12]]<<7 | dec[src[13]]<<2 | dec[src[14]]>>3 + id[9] = dec[src[14]]<<5 | dec[src[15]] + id[10] = dec[src[16]]<<3 | dec[src[17]]>>2 + id[11] = dec[src[17]]<<6 | dec[src[18]]<<1 | dec[src[19]]>>4 +} + +// Time returns the timestamp part of the id. +// It's a runtime error to call this method with an invalid id. +func (id ID) Time() time.Time { + // First 4 bytes of ObjectId is 32-bit big-endian seconds from epoch. + secs := int64(binary.BigEndian.Uint32(id[0:4])) + return time.Unix(secs, 0) +} + +// Machine returns the 3-byte machine id part of the id. +// It's a runtime error to call this method with an invalid id. +func (id ID) Machine() []byte { + return id[4:7] +} + +// Pid returns the process id part of the id. +// It's a runtime error to call this method with an invalid id. +func (id ID) Pid() uint16 { + return binary.BigEndian.Uint16(id[7:9]) +} + +// Counter returns the incrementing value part of the id. +// It's a runtime error to call this method with an invalid id. +func (id ID) Counter() int32 { + b := id[9:12] + // Counter is stored as big-endian 3-byte value + return int32(uint32(b[0])<<16 | uint32(b[1])<<8 | uint32(b[2])) +} + +// Value implements the driver.Valuer interface. +func (id ID) Value() (driver.Value, error) { + if id.IsNil() { + return nil, nil + } + b, err := id.MarshalText() + return string(b), err +} + +// Scan implements the sql.Scanner interface. +func (id *ID) Scan(value interface{}) (err error) { + switch val := value.(type) { + case string: + return id.UnmarshalText([]byte(val)) + case []byte: + return id.UnmarshalText(val) + case nil: + *id = nilID + return nil + default: + return fmt.Errorf("xid: scanning unsupported type: %T", value) + } +} + +// IsNil Returns true if this is a "nil" ID +func (id ID) IsNil() bool { + return id == nilID +} + +// NilID returns a zero value for `xid.ID`. +func NilID() ID { + return nilID +} + +// Bytes returns the byte array representation of `ID` +func (id ID) Bytes() []byte { + return id[:] +} + +// FromBytes convert the byte array representation of `ID` back to `ID` +func FromBytes(b []byte) (ID, error) { + var id ID + if len(b) != rawLen { + return id, ErrInvalidID + } + copy(id[:], b) + return id, nil +} + +// Compare returns an integer comparing two IDs. It behaves just like `bytes.Compare`. +// The result will be 0 if two IDs are identical, -1 if current id is less than the other one, +// and 1 if current id is greater than the other. +func (id ID) Compare(other ID) int { + return bytes.Compare(id[:], other[:]) +} + + +type sorter []ID + +func (s sorter) Len() int { + return len(s) +} + +func (s sorter) Less(i, j int) bool { + return s[i].Compare(s[j]) < 0 +} + +func (s sorter) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +// Sort sorts an array of IDs inplace. +// It works by wrapping `[]ID` and use `sort.Sort`. +func Sort(ids []ID) { + sort.Sort(sorter(ids)) +} -- cgit v1.2.3