From 404aeae4545d2426c089a5f8d5e82dae56f5212b Mon Sep 17 00:00:00 2001 From: Rutger Broekhoff Date: Fri, 29 Dec 2023 21:31:53 +0100 Subject: Make Nix builds work --- vendor/github.com/google/uuid/uuid.go | 365 ++++++++++++++++++++++++++++++++++ 1 file changed, 365 insertions(+) create mode 100644 vendor/github.com/google/uuid/uuid.go (limited to 'vendor/github.com/google/uuid/uuid.go') diff --git a/vendor/github.com/google/uuid/uuid.go b/vendor/github.com/google/uuid/uuid.go new file mode 100644 index 0000000..5232b48 --- /dev/null +++ b/vendor/github.com/google/uuid/uuid.go @@ -0,0 +1,365 @@ +// Copyright 2018 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package uuid + +import ( + "bytes" + "crypto/rand" + "encoding/hex" + "errors" + "fmt" + "io" + "strings" + "sync" +) + +// A UUID is a 128 bit (16 byte) Universal Unique IDentifier as defined in RFC +// 4122. +type UUID [16]byte + +// A Version represents a UUID's version. +type Version byte + +// A Variant represents a UUID's variant. +type Variant byte + +// Constants returned by Variant. +const ( + Invalid = Variant(iota) // Invalid UUID + RFC4122 // The variant specified in RFC4122 + Reserved // Reserved, NCS backward compatibility. + Microsoft // Reserved, Microsoft Corporation backward compatibility. + Future // Reserved for future definition. +) + +const randPoolSize = 16 * 16 + +var ( + rander = rand.Reader // random function + poolEnabled = false + poolMu sync.Mutex + poolPos = randPoolSize // protected with poolMu + pool [randPoolSize]byte // protected with poolMu +) + +type invalidLengthError struct{ len int } + +func (err invalidLengthError) Error() string { + return fmt.Sprintf("invalid UUID length: %d", err.len) +} + +// IsInvalidLengthError is matcher function for custom error invalidLengthError +func IsInvalidLengthError(err error) bool { + _, ok := err.(invalidLengthError) + return ok +} + +// Parse decodes s into a UUID or returns an error if it cannot be parsed. Both +// the standard UUID forms defined in RFC 4122 +// (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and +// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx) are decoded. In addition, +// Parse accepts non-standard strings such as the raw hex encoding +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx and 38 byte "Microsoft style" encodings, +// e.g. {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}. Only the middle 36 bytes are +// examined in the latter case. Parse should not be used to validate strings as +// it parses non-standard encodings as indicated above. +func Parse(s string) (UUID, error) { + var uuid UUID + switch len(s) { + // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + case 36: + + // urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + case 36 + 9: + if !strings.EqualFold(s[:9], "urn:uuid:") { + return uuid, fmt.Errorf("invalid urn prefix: %q", s[:9]) + } + s = s[9:] + + // {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} + case 36 + 2: + s = s[1:] + + // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + case 32: + var ok bool + for i := range uuid { + uuid[i], ok = xtob(s[i*2], s[i*2+1]) + if !ok { + return uuid, errors.New("invalid UUID format") + } + } + return uuid, nil + default: + return uuid, invalidLengthError{len(s)} + } + // s is now at least 36 bytes long + // it must be of the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' { + return uuid, errors.New("invalid UUID format") + } + for i, x := range [16]int{ + 0, 2, 4, 6, + 9, 11, + 14, 16, + 19, 21, + 24, 26, 28, 30, 32, 34, + } { + v, ok := xtob(s[x], s[x+1]) + if !ok { + return uuid, errors.New("invalid UUID format") + } + uuid[i] = v + } + return uuid, nil +} + +// ParseBytes is like Parse, except it parses a byte slice instead of a string. +func ParseBytes(b []byte) (UUID, error) { + var uuid UUID + switch len(b) { + case 36: // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + case 36 + 9: // urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + if !bytes.EqualFold(b[:9], []byte("urn:uuid:")) { + return uuid, fmt.Errorf("invalid urn prefix: %q", b[:9]) + } + b = b[9:] + case 36 + 2: // {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} + b = b[1:] + case 32: // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + var ok bool + for i := 0; i < 32; i += 2 { + uuid[i/2], ok = xtob(b[i], b[i+1]) + if !ok { + return uuid, errors.New("invalid UUID format") + } + } + return uuid, nil + default: + return uuid, invalidLengthError{len(b)} + } + // s is now at least 36 bytes long + // it must be of the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + if b[8] != '-' || b[13] != '-' || b[18] != '-' || b[23] != '-' { + return uuid, errors.New("invalid UUID format") + } + for i, x := range [16]int{ + 0, 2, 4, 6, + 9, 11, + 14, 16, + 19, 21, + 24, 26, 28, 30, 32, 34, + } { + v, ok := xtob(b[x], b[x+1]) + if !ok { + return uuid, errors.New("invalid UUID format") + } + uuid[i] = v + } + return uuid, nil +} + +// MustParse is like Parse but panics if the string cannot be parsed. +// It simplifies safe initialization of global variables holding compiled UUIDs. +func MustParse(s string) UUID { + uuid, err := Parse(s) + if err != nil { + panic(`uuid: Parse(` + s + `): ` + err.Error()) + } + return uuid +} + +// FromBytes creates a new UUID from a byte slice. Returns an error if the slice +// does not have a length of 16. The bytes are copied from the slice. +func FromBytes(b []byte) (uuid UUID, err error) { + err = uuid.UnmarshalBinary(b) + return uuid, err +} + +// Must returns uuid if err is nil and panics otherwise. +func Must(uuid UUID, err error) UUID { + if err != nil { + panic(err) + } + return uuid +} + +// Validate returns an error if s is not a properly formatted UUID in one of the following formats: +// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx +// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} +// It returns an error if the format is invalid, otherwise nil. +func Validate(s string) error { + switch len(s) { + // Standard UUID format + case 36: + + // UUID with "urn:uuid:" prefix + case 36 + 9: + if !strings.EqualFold(s[:9], "urn:uuid:") { + return fmt.Errorf("invalid urn prefix: %q", s[:9]) + } + s = s[9:] + + // UUID enclosed in braces + case 36 + 2: + if s[0] != '{' || s[len(s)-1] != '}' { + return fmt.Errorf("invalid bracketed UUID format") + } + s = s[1 : len(s)-1] + + // UUID without hyphens + case 32: + for i := 0; i < len(s); i += 2 { + _, ok := xtob(s[i], s[i+1]) + if !ok { + return errors.New("invalid UUID format") + } + } + + default: + return invalidLengthError{len(s)} + } + + // Check for standard UUID format + if len(s) == 36 { + if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' { + return errors.New("invalid UUID format") + } + for _, x := range []int{0, 2, 4, 6, 9, 11, 14, 16, 19, 21, 24, 26, 28, 30, 32, 34} { + if _, ok := xtob(s[x], s[x+1]); !ok { + return errors.New("invalid UUID format") + } + } + } + + return nil +} + +// String returns the string form of uuid, xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx +// , or "" if uuid is invalid. +func (uuid UUID) String() string { + var buf [36]byte + encodeHex(buf[:], uuid) + return string(buf[:]) +} + +// URN returns the RFC 2141 URN form of uuid, +// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, or "" if uuid is invalid. +func (uuid UUID) URN() string { + var buf [36 + 9]byte + copy(buf[:], "urn:uuid:") + encodeHex(buf[9:], uuid) + return string(buf[:]) +} + +func encodeHex(dst []byte, uuid UUID) { + hex.Encode(dst, uuid[:4]) + dst[8] = '-' + hex.Encode(dst[9:13], uuid[4:6]) + dst[13] = '-' + hex.Encode(dst[14:18], uuid[6:8]) + dst[18] = '-' + hex.Encode(dst[19:23], uuid[8:10]) + dst[23] = '-' + hex.Encode(dst[24:], uuid[10:]) +} + +// Variant returns the variant encoded in uuid. +func (uuid UUID) Variant() Variant { + switch { + case (uuid[8] & 0xc0) == 0x80: + return RFC4122 + case (uuid[8] & 0xe0) == 0xc0: + return Microsoft + case (uuid[8] & 0xe0) == 0xe0: + return Future + default: + return Reserved + } +} + +// Version returns the version of uuid. +func (uuid UUID) Version() Version { + return Version(uuid[6] >> 4) +} + +func (v Version) String() string { + if v > 15 { + return fmt.Sprintf("BAD_VERSION_%d", v) + } + return fmt.Sprintf("VERSION_%d", v) +} + +func (v Variant) String() string { + switch v { + case RFC4122: + return "RFC4122" + case Reserved: + return "Reserved" + case Microsoft: + return "Microsoft" + case Future: + return "Future" + case Invalid: + return "Invalid" + } + return fmt.Sprintf("BadVariant%d", int(v)) +} + +// SetRand sets the random number generator to r, which implements io.Reader. +// If r.Read returns an error when the package requests random data then +// a panic will be issued. +// +// Calling SetRand with nil sets the random number generator to the default +// generator. +func SetRand(r io.Reader) { + if r == nil { + rander = rand.Reader + return + } + rander = r +} + +// EnableRandPool enables internal randomness pool used for Random +// (Version 4) UUID generation. The pool contains random bytes read from +// the random number generator on demand in batches. Enabling the pool +// may improve the UUID generation throughput significantly. +// +// Since the pool is stored on the Go heap, this feature may be a bad fit +// for security sensitive applications. +// +// Both EnableRandPool and DisableRandPool are not thread-safe and should +// only be called when there is no possibility that New or any other +// UUID Version 4 generation function will be called concurrently. +func EnableRandPool() { + poolEnabled = true +} + +// DisableRandPool disables the randomness pool if it was previously +// enabled with EnableRandPool. +// +// Both EnableRandPool and DisableRandPool are not thread-safe and should +// only be called when there is no possibility that New or any other +// UUID Version 4 generation function will be called concurrently. +func DisableRandPool() { + poolEnabled = false + defer poolMu.Unlock() + poolMu.Lock() + poolPos = randPoolSize +} + +// UUIDs is a slice of UUID types. +type UUIDs []UUID + +// Strings returns a string slice containing the string form of each UUID in uuids. +func (uuids UUIDs) Strings() []string { + var uuidStrs = make([]string, len(uuids)) + for i, uuid := range uuids { + uuidStrs[i] = uuid.String() + } + return uuidStrs +} -- cgit v1.2.3