reifydb-codec 0.9.0

Unified encoding and decoding for all ReifyDB values, frames, rows, keys, and boundaries
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2026 ReifyDB

#[allow(clippy::approx_constant)]
use std::f32::consts::{E, PI};

use reifydb_codec::row::shape::{RowFamily, RowShape};
use reifydb_value::value::value_type::ValueType;

#[test]
fn test_set_get_f32() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();
	shape.set::<f32>(&mut row, 0, 1.25f32);
	assert_eq!(shape.get::<f32>(&row, 0), 1.25f32);
}

#[test]
fn test_try_get_f32() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	assert_eq!(shape.try_get::<f32>(&row, 0), None);

	shape.set::<f32>(&mut row, 0, 1.25f32);
	assert_eq!(shape.try_get::<f32>(&row, 0), Some(1.25f32));
}

#[test]
fn test_special_values() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	shape.set::<f32>(&mut row, 0, 0.0f32);
	assert_eq!(shape.get::<f32>(&row, 0), 0.0f32);

	let mut row2 = shape.allocate_pod();
	shape.set::<f32>(&mut row2, 0, -0.0f32);
	assert_eq!(shape.get::<f32>(&row2, 0), -0.0f32);

	let mut row3 = shape.allocate_pod();
	shape.set::<f32>(&mut row3, 0, f32::INFINITY);
	assert_eq!(shape.get::<f32>(&row3, 0), f32::INFINITY);

	let mut row4 = shape.allocate_pod();
	shape.set::<f32>(&mut row4, 0, f32::NEG_INFINITY);
	assert_eq!(shape.get::<f32>(&row4, 0), f32::NEG_INFINITY);

	let mut row5 = shape.allocate_pod();
	shape.set::<f32>(&mut row5, 0, f32::NAN);
	assert!(shape.get::<f32>(&row5, 0).is_nan());
}

#[test]
fn test_extreme_values() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	shape.set::<f32>(&mut row, 0, f32::MAX);
	assert_eq!(shape.get::<f32>(&row, 0), f32::MAX);

	let mut row2 = shape.allocate_pod();
	shape.set::<f32>(&mut row2, 0, f32::MIN);
	assert_eq!(shape.get::<f32>(&row2, 0), f32::MIN);

	let mut row3 = shape.allocate_pod();
	shape.set::<f32>(&mut row3, 0, f32::MIN_POSITIVE);
	assert_eq!(shape.get::<f32>(&row3, 0), f32::MIN_POSITIVE);
}

#[test]
fn test_mixed_with_other_types() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4, ValueType::Int4, ValueType::Float4]);
	let mut row = shape.allocate_pod();

	shape.set::<f32>(&mut row, 0, 3.14f32);
	shape.set::<i32>(&mut row, 1, 42i32);
	shape.set::<f32>(&mut row, 2, -2.718f32);

	assert_eq!(shape.get::<f32>(&row, 0), 3.14f32);
	assert_eq!(shape.get::<i32>(&row, 1), 42);
	assert_eq!(shape.get::<f32>(&row, 2), -2.718f32);
}

#[test]
fn test_undefined_handling() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4, ValueType::Float4]);
	let mut row = shape.allocate_pod();

	shape.set::<f32>(&mut row, 0, 3.14f32);

	assert_eq!(shape.try_get::<f32>(&row, 0), Some(3.14f32));
	assert_eq!(shape.try_get::<f32>(&row, 1), None);

	shape.set_none(&mut row, 0);
	assert_eq!(shape.try_get::<f32>(&row, 0), None);
}

#[test]
fn test_try_get_f32_wrong_type() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Boolean]);
	let mut row = shape.allocate_pod();

	shape.set::<bool>(&mut row, 0, true);

	assert_eq!(shape.try_get::<f32>(&row, 0), None);
}

#[test]
fn test_subnormal_values() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	// Bit comparison, not value comparison: subnormals must survive the slot bit-exact.
	let min_subnormal = f32::from_bits(0x00000001);
	shape.set::<f32>(&mut row, 0, min_subnormal);
	assert_eq!(shape.get::<f32>(&row, 0).to_bits(), min_subnormal.to_bits());

	let max_subnormal = f32::from_bits(0x007fffff);
	shape.set::<f32>(&mut row, 0, max_subnormal);
	assert_eq!(shape.get::<f32>(&row, 0).to_bits(), max_subnormal.to_bits());

	let neg_subnormal = f32::from_bits(0x80000001);
	shape.set::<f32>(&mut row, 0, neg_subnormal);
	assert_eq!(shape.get::<f32>(&row, 0).to_bits(), neg_subnormal.to_bits());
}

#[test]
fn test_nan_payload_preservation() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	// The slot stores raw bits, so the NaN payload and sign must come back unchanged.
	let quiet_nan = f32::NAN;
	shape.set::<f32>(&mut row, 0, quiet_nan);
	assert!(shape.get::<f32>(&row, 0).is_nan());

	let nan_with_payload = f32::from_bits(0x7fc00001);
	shape.set::<f32>(&mut row, 0, nan_with_payload);
	assert_eq!(shape.get::<f32>(&row, 0).to_bits(), nan_with_payload.to_bits());

	let neg_nan = f32::from_bits(0xffc00000);
	shape.set::<f32>(&mut row, 0, neg_nan);
	assert_eq!(shape.get::<f32>(&row, 0).to_bits(), neg_nan.to_bits());
}

#[test]
fn test_repeated_operations() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();
	let initial_len = row.len();

	for i in 0..1000 {
		let value = (i as f32) * 0.1;
		shape.set::<f32>(&mut row, 0, value);
		assert_eq!(shape.get::<f32>(&row, 0), value);
	}

	// A static-width field is overwritten in place, so repeated writes must not grow the row.
	assert_eq!(row.len(), initial_len);
}

#[test]
fn test_unaligned_access() {
	let shape = create_unaligned_layout(ValueType::Float4);
	let mut row = shape.allocate_pod();

	shape.set::<f32>(&mut row, 1, PI);
	assert_eq!(shape.get::<f32>(&row, 1), PI);

	shape.set::<f32>(&mut row, 3, E);
	assert_eq!(shape.get::<f32>(&row, 3), E);

	assert_eq!(shape.get::<f32>(&row, 1), PI);
	assert_eq!(shape.get::<f32>(&row, 3), E);
}

#[test]
fn test_denormalized_transitions() {
	let shape = RowShape::testing(RowFamily::Pod, &[ValueType::Float4]);
	let mut row = shape.allocate_pod();

	let values = [
		f32::MIN_POSITIVE,       // Smallest normal
		f32::MIN_POSITIVE / 2.0, // Becomes subnormal
		f32::MIN_POSITIVE / 4.0, // Smaller subnormal
		0.0f32,                  // Underflows to zero
	];

	for value in values {
		shape.set::<f32>(&mut row, 0, value);
		let retrieved = shape.get::<f32>(&row, 0);
		if value == 0.0 {
			assert_eq!(retrieved, 0.0);
		} else {
			assert_eq!(retrieved.to_bits(), value.to_bits());
		}
	}
}

/// Interleaves 1-byte fields so the target type never lands on its natural alignment.
pub fn create_unaligned_layout(target_type: ValueType) -> RowShape {
	RowShape::testing(
		RowFamily::Pod,
		&[
			ValueType::Int1,     // 1 byte offset
			target_type.clone(), // Now at odd offset
			ValueType::Int1,     // Another odd-sized field
			target_type,         /* Another instance at different odd
			                      * offset */
		],
	)
}