reifydb_codec/key/
serializer.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2026 ReifyDB
3
4use arrow_buffer::i256;
5use reifydb_value::{
6	Result,
7	error::{Error, TypeError},
8	value::{
9		Value,
10		blob::Blob,
11		constraint::{precision::Precision, scale::Scale},
12		date::Date,
13		datetime::DateTime,
14		decimal::Decimal,
15		dictionary::DictionaryEntryId,
16		duration::Duration,
17		identity::IdentityId,
18		row_number::RowNumber,
19		time::Time,
20		uuid::{Uuid4, Uuid7},
21		value_type::ValueType,
22	},
23};
24
25use super::{
26	ByteSink, CONTAINER_END, encode_bool, encode_bytes, encode_f32, encode_f64, encode_fixed, encode_i8,
27	encode_i16, encode_i32, encode_i64, encode_i128, encode_i256, encode_u8, encode_u16, encode_u32, encode_u64,
28	encode_u128, encode_u128_varint,
29};
30use crate::{
31	key::{buf::KeyBuf, encoded::EncodedKey},
32	tag::{TypeTag, ValueKind},
33	unscaled::{NARROW, decimal_unscaled, width},
34};
35
36pub(super) fn keycode_type_descending(ty: &ValueType) -> bool {
37	matches!(
38		ty,
39		ValueType::Boolean
40			| ValueType::Float4 | ValueType::Float8
41			| ValueType::Int1 | ValueType::Int2
42			| ValueType::Int4 | ValueType::Int8
43			| ValueType::Int16 | ValueType::Uint1
44			| ValueType::Uint2 | ValueType::Uint4
45			| ValueType::Uint8 | ValueType::Uint16
46			| ValueType::Date | ValueType::DateTime
47			| ValueType::Time | ValueType::Duration
48			| ValueType::Utf8 | ValueType::Blob
49			| ValueType::Uuid4 | ValueType::Uuid7
50			| ValueType::IdentityId
51			| ValueType::Decimal { .. }
52			| ValueType::DictionaryId
53			| ValueType::List(_) | ValueType::Record(_)
54			| ValueType::Tuple(_)
55	)
56}
57
58pub struct KeySerializer {
59	buffer: KeyBuf,
60}
61
62impl KeySerializer {
63	pub fn new() -> Self {
64		Self {
65			buffer: KeyBuf::new(),
66		}
67	}
68
69	pub fn with_capacity(capacity: usize) -> Self {
70		Self {
71			buffer: KeyBuf::with_capacity(capacity),
72		}
73	}
74
75	pub fn extend_bool(&mut self, value: bool) -> &mut Self {
76		self.buffer.push(encode_bool(value));
77		self
78	}
79
80	pub fn extend_f32(&mut self, value: f32) -> &mut Self {
81		self.buffer.extend_from_slice(&encode_f32(value));
82		self
83	}
84
85	pub fn extend_f64(&mut self, value: f64) -> &mut Self {
86		self.buffer.extend_from_slice(&encode_f64(value));
87		self
88	}
89
90	pub fn extend_i8<T: Into<i8>>(&mut self, value: T) -> &mut Self {
91		self.buffer.extend_from_slice(&encode_i8(value.into()));
92		self
93	}
94
95	pub fn extend_i16<T: Into<i16>>(&mut self, value: T) -> &mut Self {
96		self.buffer.extend_from_slice(&encode_i16(value.into()));
97		self
98	}
99
100	pub fn extend_i32<T: Into<i32>>(&mut self, value: T) -> &mut Self {
101		self.buffer.extend_from_slice(&encode_i32(value.into()));
102		self
103	}
104
105	pub fn extend_i64<T: Into<i64>>(&mut self, value: T) -> &mut Self {
106		self.buffer.extend_from_slice(&encode_i64(value.into()));
107		self
108	}
109
110	pub fn extend_i128<T: Into<i128>>(&mut self, value: T) -> &mut Self {
111		self.buffer.extend_from_slice(&encode_i128(value.into()));
112		self
113	}
114
115	pub fn extend_u8<T: Into<u8>>(&mut self, value: T) -> &mut Self {
116		self.buffer.push(encode_u8(value.into()));
117		self
118	}
119
120	pub fn extend_u16<T: Into<u16>>(&mut self, value: T) -> &mut Self {
121		self.buffer.extend_from_slice(&encode_u16(value.into()));
122		self
123	}
124
125	pub fn extend_u32<T: Into<u32>>(&mut self, value: T) -> &mut Self {
126		self.buffer.extend_from_slice(&encode_u32(value.into()));
127		self
128	}
129
130	pub fn extend_u64<T: Into<u64>>(&mut self, value: T) -> &mut Self {
131		self.buffer.extend_from_slice(&encode_u64(value.into()));
132		self
133	}
134
135	pub fn extend_u128<T: Into<u128>>(&mut self, value: T) -> &mut Self {
136		self.buffer.extend_from_slice(&encode_u128(value.into()));
137		self
138	}
139
140	pub fn extend_fixed<const N: usize>(&mut self, value: [u8; N]) -> &mut Self {
141		self.buffer.extend_from_slice(&encode_fixed(value));
142		self
143	}
144
145	pub fn extend_u128_varint<T: Into<u128>>(&mut self, value: T) -> &mut Self {
146		encode_u128_varint(value.into(), &mut self.buffer);
147		self
148	}
149
150	pub fn extend_bytes<T: AsRef<[u8]>>(&mut self, bytes: T) -> &mut Self {
151		encode_bytes(bytes.as_ref(), &mut self.buffer);
152		self
153	}
154
155	pub fn extend_str<T: AsRef<str>>(&mut self, s: T) -> &mut Self {
156		self.extend_bytes(s.as_ref().as_bytes())
157	}
158
159	pub fn finish(self) -> EncodedKey {
160		self.buffer.finish()
161	}
162
163	pub fn to_encoded_key(self) -> EncodedKey {
164		self.buffer.finish()
165	}
166
167	pub fn extend_raw(&mut self, bytes: &[u8]) -> &mut Self {
168		self.buffer.extend_from_slice(bytes);
169		self
170	}
171
172	pub fn extend_kind(&mut self, kind: ValueKind) -> &mut Self {
173		self.buffer.push(kind.byte());
174		self
175	}
176
177	pub fn len(&self) -> usize {
178		self.buffer.len()
179	}
180
181	pub(crate) fn complement_from(&mut self, start: usize) {
182		for byte in &mut self.buffer.as_mut_slice()[start..] {
183			*byte = !*byte;
184		}
185	}
186
187	pub fn is_empty(&self) -> bool {
188		self.buffer.is_empty()
189	}
190
191	pub fn extend_date(&mut self, date: &Date) -> &mut Self {
192		self.extend_i32(date.to_days_since_epoch())
193	}
194
195	pub fn extend_datetime(&mut self, datetime: &DateTime) -> &mut Self {
196		self.extend_i64(datetime.to_nanos())
197	}
198
199	pub fn extend_time(&mut self, time: &Time) -> &mut Self {
200		self.extend_u64(time.to_nanos_since_midnight())
201	}
202
203	pub fn extend_duration(&mut self, duration: &Duration) -> &mut Self {
204		self.extend_i32(duration.get_months()).extend_i32(duration.get_days()).extend_i64(duration.get_nanos())
205	}
206
207	pub fn extend_row_number(&mut self, row_number: &RowNumber) -> &mut Self {
208		self.extend_u64(row_number.0)
209	}
210
211	pub fn extend_identity_id(&mut self, id: &IdentityId) -> &mut Self {
212		self.extend_bytes(id.as_bytes())
213	}
214
215	pub fn extend_uuid4(&mut self, uuid: &Uuid4) -> &mut Self {
216		self.extend_bytes(uuid.as_bytes())
217	}
218
219	pub fn extend_uuid7(&mut self, uuid: &Uuid7) -> &mut Self {
220		self.extend_bytes(uuid.as_bytes())
221	}
222
223	pub fn extend_blob(&mut self, blob: &Blob) -> &mut Self {
224		self.extend_bytes(blob.as_ref() as &[u8])
225	}
226
227	pub fn extend_decimal(&mut self, value: &Decimal, precision: Precision, scale: Scale) -> Result<&mut Self> {
228		let unscaled = decimal_unscaled(value, precision, scale).ok_or_else(|| {
229			key_error(format!(
230				"decimal {value} does not fit precision {} and scale {}",
231				precision.value(),
232				scale.value()
233			))
234		})?;
235		self.buffer.push(encode_u8(precision.value()));
236		self.buffer.push(encode_u8(scale.value()));
237		Ok(self.extend_unscaled(unscaled, precision))
238	}
239
240	fn extend_unscaled(&mut self, unscaled: i256, precision: Precision) -> &mut Self {
241		if width(precision) == NARROW {
242			let narrow = unscaled.to_i128().expect("a value within precision 38 fits i128");
243			self.buffer.extend_from_slice(&encode_i128(narrow));
244		} else {
245			self.buffer.extend_from_slice(&encode_i256(unscaled));
246		}
247		self
248	}
249
250	pub fn extend_value(&mut self, value: &Value) -> &mut Self {
251		if let Err(error) = self.try_extend_value(value) {
252			panic!("key serialization of a {} value failed: {error}", value.get_type());
253		}
254		self
255	}
256
257	pub fn try_extend_value(&mut self, value: &Value) -> Result<&mut Self> {
258		match value {
259			Value::None {
260				inner,
261				..
262			} => {
263				self.buffer.push(ValueKind::None.byte());
264				if ValueKind::of_type(inner) == ValueKind::Digest {
265					return Err(Error::from(TypeError::SerdeKeycode {
266						message: format!(
267							"a none of type {inner} cannot be serialized in a key"
268						),
269					}));
270				}
271				let tag = TypeTag::of_type(inner)
272					.expect("option nesting in a key none inner exceeds the supported depth");
273				self.buffer.push(tag.byte());
274			}
275			Value::Boolean(b) => {
276				self.buffer.push(ValueKind::Boolean.byte());
277				self.extend_bool(*b);
278			}
279			Value::Float4(f) => {
280				self.buffer.push(ValueKind::Float4.byte());
281				self.extend_f32(**f);
282			}
283			Value::Float8(f) => {
284				self.buffer.push(ValueKind::Float8.byte());
285				self.extend_f64(**f);
286			}
287			Value::Int1(i) => {
288				self.buffer.push(ValueKind::Int1.byte());
289				self.extend_i8(*i);
290			}
291			Value::Int2(i) => {
292				self.buffer.push(ValueKind::Int2.byte());
293				self.extend_i16(*i);
294			}
295			Value::Int4(i) => {
296				self.buffer.push(ValueKind::Int4.byte());
297				self.extend_i32(*i);
298			}
299			Value::Int8(i) => {
300				self.buffer.push(ValueKind::Int8.byte());
301				self.extend_i64(*i);
302			}
303			Value::Int16(i) => {
304				self.buffer.push(ValueKind::Int16.byte());
305				self.extend_i128(*i);
306			}
307			Value::Utf8(s) => {
308				self.buffer.push(ValueKind::Utf8.byte());
309				self.extend_str(s);
310			}
311
312			Value::Uint1(u) => {
313				self.buffer.push(ValueKind::Uint1.byte());
314				self.extend_u8(*u);
315			}
316			Value::Uint2(u) => {
317				self.buffer.push(ValueKind::Uint2.byte());
318				self.extend_u16(*u);
319			}
320			Value::Uint4(u) => {
321				self.buffer.push(ValueKind::Uint4.byte());
322				self.extend_u32(*u);
323			}
324			Value::Uint8(u) => {
325				self.buffer.push(ValueKind::Uint8.byte());
326				self.extend_u64(*u);
327			}
328			Value::Uint16(u) => {
329				self.buffer.push(ValueKind::Uint16.byte());
330				self.extend_u128(*u);
331			}
332			Value::Date(d) => {
333				self.buffer.push(ValueKind::Date.byte());
334				self.extend_date(d);
335			}
336			Value::DateTime(dt) => {
337				self.buffer.push(ValueKind::DateTime.byte());
338				self.extend_datetime(dt);
339			}
340			Value::Time(t) => {
341				self.buffer.push(ValueKind::Time.byte());
342				self.extend_time(t);
343			}
344			Value::Duration(i) => {
345				self.buffer.push(ValueKind::Duration.byte());
346				self.extend_duration(i);
347			}
348			Value::IdentityId(id) => {
349				self.buffer.push(ValueKind::IdentityId.byte());
350				self.extend_identity_id(id);
351			}
352			Value::Uuid4(uuid) => {
353				self.buffer.push(ValueKind::Uuid4.byte());
354				self.extend_uuid4(uuid);
355			}
356			Value::Uuid7(uuid) => {
357				self.buffer.push(ValueKind::Uuid7.byte());
358				self.extend_uuid7(uuid);
359			}
360			Value::Blob(b) => {
361				self.buffer.push(ValueKind::Blob.byte());
362				self.extend_blob(b);
363			}
364			Value::Decimal(d) => {
365				self.buffer.push(ValueKind::Decimal.byte());
366				self.extend_decimal(d, Precision::MAX, Scale::new(d.scale()))?;
367			}
368			Value::List(items) => {
369				self.buffer.push(ValueKind::List.byte());
370				for item in items {
371					self.try_extend_value(item)?;
372				}
373				self.buffer.push(CONTAINER_END);
374			}
375			Value::Tuple(items) => {
376				self.buffer.push(ValueKind::Tuple.byte());
377				for item in items {
378					self.try_extend_value(item)?;
379				}
380				self.buffer.push(CONTAINER_END);
381			}
382			Value::Record(fields) => {
383				self.buffer.push(ValueKind::Record.byte());
384				for (name, value) in fields {
385					self.extend_bytes(name.as_bytes());
386					self.try_extend_value(value)?;
387				}
388				self.buffer.push(CONTAINER_END);
389			}
390			Value::Any(_) | Value::Type(_) => {
391				return Err(Error::from(TypeError::SerdeKeycode {
392					message: format!("a {} value cannot be serialized in a key", value.get_type()),
393				}));
394			}
395			Value::Digest(_) => {
396				return Err(Error::from(TypeError::SerdeKeycode {
397					message: "a digest value cannot be serialized in a key".to_string(),
398				}));
399			}
400			Value::Enum(_) => {
401				return Err(Error::from(TypeError::SerdeKeycode {
402					message: "an enum value cannot be serialized in a key".to_string(),
403				}));
404			}
405			Value::DictionaryId(id) => {
406				self.buffer.push(ValueKind::DictionaryId.byte());
407				match id {
408					DictionaryEntryId::U1(v) => {
409						self.buffer.push(0x00);
410						self.extend_u8(*v);
411					}
412					DictionaryEntryId::U2(v) => {
413						self.buffer.push(0x01);
414						self.extend_u16(*v);
415					}
416					DictionaryEntryId::U4(v) => {
417						self.buffer.push(0x02);
418						self.extend_u32(*v);
419					}
420					DictionaryEntryId::U8(v) => {
421						self.buffer.push(0x03);
422						self.extend_u64(*v);
423					}
424					DictionaryEntryId::U16(v) => {
425						self.buffer.push(0x04);
426						self.extend_u128(*v);
427					}
428				}
429			}
430		}
431		Ok(self)
432	}
433}
434
435impl Default for KeySerializer {
436	fn default() -> Self {
437		Self::new()
438	}
439}
440
441impl ByteSink for KeySerializer {
442	fn push(&mut self, byte: u8) {
443		self.buffer.push(byte);
444	}
445
446	fn extend_from_slice(&mut self, slice: &[u8]) {
447		self.buffer.extend_from_slice(slice);
448	}
449}
450
451fn key_error(message: String) -> Error {
452	Error::from(TypeError::SerdeKeycode {
453		message,
454	})
455}
reifydb_codec/key/serializer.rs

reifydb_codec/key/
serializer.rs
