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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| // Package uuid provides functions to generate RFC 4122 UUIDs. | ||
| // | ||
| // https://sqlite.org/src/file/ext/misc/uuid.c | ||
| package uuid | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
|
|
||
| "github.com/google/uuid" | ||
| "github.com/ncruces/go-sqlite3" | ||
| "github.com/ncruces/go-sqlite3/internal/util" | ||
| ) | ||
|
|
||
| // Register registers the SQL functions: | ||
| // | ||
| // uuid([version], [domain/namespace], [id/data]) | ||
| // | ||
| // Generates a UUID as a string. | ||
| // | ||
| // uuid_str(u) | ||
| // | ||
| // Converts a UUID into a well-formed UUID string. | ||
| // | ||
| // uuid_blob(u) | ||
| // | ||
| // Converts a UUID into a 16-byte blob. | ||
| func Register(db *sqlite3.Conn) { | ||
| flags := sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS | ||
| db.CreateFunction("uuid", 0, sqlite3.INNOCUOUS, generate) | ||
| db.CreateFunction("uuid", 1, sqlite3.INNOCUOUS, generate) | ||
| db.CreateFunction("uuid", 2, sqlite3.INNOCUOUS, generate) | ||
| db.CreateFunction("uuid", 3, sqlite3.INNOCUOUS, generate) | ||
| db.CreateFunction("uuid_str", 1, flags, toString) | ||
| db.CreateFunction("uuid_blob", 1, flags, toBLOB) | ||
| } | ||
|
|
||
| func generate(ctx sqlite3.Context, arg ...sqlite3.Value) { | ||
| var ( | ||
| ver int | ||
| err error | ||
| u uuid.UUID | ||
| ) | ||
|
|
||
| if len(arg) > 0 { | ||
| ver = arg[0].Int() | ||
| } else { | ||
| ver = 4 | ||
| } | ||
|
|
||
| switch ver { | ||
| case 1: | ||
| u, err = uuid.NewUUID() | ||
| case 4: | ||
| u, err = uuid.NewRandom() | ||
| case 6: | ||
| u, err = uuid.NewV6() | ||
| case 7: | ||
| u, err = uuid.NewV7() | ||
|
|
||
| case 2: | ||
| var domain uuid.Domain | ||
| if len(arg) > 1 { | ||
| domain = uuid.Domain(arg[1].Int64()) | ||
| if domain == 0 { | ||
| if txt := arg[1].RawText(); len(txt) > 0 { | ||
| switch txt[0] | 0x20 { | ||
| case 'g': // group | ||
| domain = 1 | ||
| case 'o': // org | ||
| domain = 2 | ||
| } | ||
| } | ||
| } | ||
| } | ||
| if len(arg) > 2 { | ||
| id := uint32(arg[2].Int64()) | ||
| u, err = uuid.NewDCESecurity(domain, id) | ||
| } else if domain == uuid.Person { | ||
| u, err = uuid.NewDCEPerson() | ||
| } else if domain == uuid.Group { | ||
| u, err = uuid.NewDCEGroup() | ||
| } else { | ||
| err = util.ErrorString("missing id") | ||
| } | ||
|
|
||
| case 3, 5: | ||
| if len(arg) < 2 { | ||
| err = util.ErrorString("missing data") | ||
| break | ||
| } | ||
| ns, err := fromValue(arg[1]) | ||
| if err != nil { | ||
| space := arg[1].RawText() | ||
| switch { | ||
| case bytes.EqualFold(space, []byte("url")): | ||
| ns = uuid.NameSpaceURL | ||
| case bytes.EqualFold(space, []byte("oid")): | ||
| ns = uuid.NameSpaceOID | ||
| case bytes.EqualFold(space, []byte("dns")): | ||
| ns = uuid.NameSpaceDNS | ||
| case bytes.EqualFold(space, []byte("fqdn")): | ||
| ns = uuid.NameSpaceDNS | ||
| case bytes.EqualFold(space, []byte("x500")): | ||
| ns = uuid.NameSpaceX500 | ||
| default: | ||
| ctx.ResultError(err) | ||
| return | ||
| } | ||
| } | ||
| if ver == 3 { | ||
| u = uuid.NewMD5(ns, arg[2].RawBlob()) | ||
| } else { | ||
| u = uuid.NewSHA1(ns, arg[2].RawBlob()) | ||
| } | ||
|
|
||
| default: | ||
| err = fmt.Errorf("invalid version: %d", ver) | ||
| } | ||
|
|
||
| if err != nil { | ||
| ctx.ResultError(fmt.Errorf("uuid: %w", err)) | ||
| } else { | ||
| ctx.ResultText(u.String()) | ||
| } | ||
| } | ||
|
|
||
| func fromValue(arg sqlite3.Value) (u uuid.UUID, err error) { | ||
| switch t := arg.Type(); t { | ||
| case sqlite3.TEXT: | ||
| u, err = uuid.ParseBytes(arg.RawText()) | ||
| if err != nil { | ||
| err = fmt.Errorf("uuid: %w", err) | ||
| } | ||
|
|
||
| case sqlite3.BLOB: | ||
| blob := arg.RawBlob() | ||
| if len := len(blob); len != 16 { | ||
| err = fmt.Errorf("uuid: invalid BLOB length: %d", len) | ||
| } else { | ||
| copy(u[:], blob) | ||
| } | ||
|
|
||
| default: | ||
| err = fmt.Errorf("uuid: invalid type: %v", t) | ||
| } | ||
| return u, err | ||
| } | ||
|
|
||
| func toBLOB(ctx sqlite3.Context, arg ...sqlite3.Value) { | ||
| u, err := fromValue(arg[0]) | ||
| if err != nil { | ||
| ctx.ResultError(err) | ||
| } else { | ||
| ctx.ResultBlob(u[:]) | ||
| } | ||
| } | ||
|
|
||
| func toString(ctx sqlite3.Context, arg ...sqlite3.Value) { | ||
| u, err := fromValue(arg[0]) | ||
| if err != nil { | ||
| ctx.ResultError(err) | ||
| } else { | ||
| ctx.ResultText(u.String()) | ||
| } | ||
| } |
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