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author | Wim <wim@42.be> | 2021-12-12 00:05:15 +0100 |
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committer | GitHub <noreply@github.com> | 2021-12-12 00:05:15 +0100 |
commit | 3893a035be347a7687a41d2054dd1b274d3a0504 (patch) | |
tree | dfe4a3bf72a0a6356e51bd8fc2e88e9a26e52331 /vendor/github.com/google/uuid/null.go | |
parent | 658bdd9faa835660ae407331732e9d93d8f6443b (diff) | |
download | matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.tar.gz matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.tar.bz2 matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.zip |
Update dependencies/vendor (#1659)
Diffstat (limited to 'vendor/github.com/google/uuid/null.go')
-rw-r--r-- | vendor/github.com/google/uuid/null.go | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/vendor/github.com/google/uuid/null.go b/vendor/github.com/google/uuid/null.go new file mode 100644 index 00000000..d7fcbf28 --- /dev/null +++ b/vendor/github.com/google/uuid/null.go @@ -0,0 +1,118 @@ +// Copyright 2021 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" + "database/sql/driver" + "encoding/json" + "fmt" +) + +var jsonNull = []byte("null") + +// NullUUID represents a UUID that may be null. +// NullUUID implements the SQL driver.Scanner interface so +// it can be used as a scan destination: +// +// var u uuid.NullUUID +// err := db.QueryRow("SELECT name FROM foo WHERE id=?", id).Scan(&u) +// ... +// if u.Valid { +// // use u.UUID +// } else { +// // NULL value +// } +// +type NullUUID struct { + UUID UUID + Valid bool // Valid is true if UUID is not NULL +} + +// Scan implements the SQL driver.Scanner interface. +func (nu *NullUUID) Scan(value interface{}) error { + if value == nil { + nu.UUID, nu.Valid = Nil, false + return nil + } + + err := nu.UUID.Scan(value) + if err != nil { + nu.Valid = false + return err + } + + nu.Valid = true + return nil +} + +// Value implements the driver Valuer interface. +func (nu NullUUID) Value() (driver.Value, error) { + if !nu.Valid { + return nil, nil + } + // Delegate to UUID Value function + return nu.UUID.Value() +} + +// MarshalBinary implements encoding.BinaryMarshaler. +func (nu NullUUID) MarshalBinary() ([]byte, error) { + if nu.Valid { + return nu.UUID[:], nil + } + + return []byte(nil), nil +} + +// UnmarshalBinary implements encoding.BinaryUnmarshaler. +func (nu *NullUUID) UnmarshalBinary(data []byte) error { + if len(data) != 16 { + return fmt.Errorf("invalid UUID (got %d bytes)", len(data)) + } + copy(nu.UUID[:], data) + nu.Valid = true + return nil +} + +// MarshalText implements encoding.TextMarshaler. +func (nu NullUUID) MarshalText() ([]byte, error) { + if nu.Valid { + return nu.UUID.MarshalText() + } + + return jsonNull, nil +} + +// UnmarshalText implements encoding.TextUnmarshaler. +func (nu *NullUUID) UnmarshalText(data []byte) error { + id, err := ParseBytes(data) + if err != nil { + nu.Valid = false + return err + } + nu.UUID = id + nu.Valid = true + return nil +} + +// MarshalJSON implements json.Marshaler. +func (nu NullUUID) MarshalJSON() ([]byte, error) { + if nu.Valid { + return json.Marshal(nu.UUID) + } + + return jsonNull, nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (nu *NullUUID) UnmarshalJSON(data []byte) error { + if bytes.Equal(data, jsonNull) { + *nu = NullUUID{} + return nil // valid null UUID + } + err := json.Unmarshal(data, &nu.UUID) + nu.Valid = err == nil + return err +} |