Crate wickra_embed_core 

Allocation-free, #![no_std] streaming technical indicators.

wickra-embed-core runs the Wickra indicator math where there is no operating system and no heap — microcontrollers, FPGA soft-cores, HFT co-processors. Every Indicator update is O(1) with a bounded worst case, keeps its state inline in fixed-capacity buffers (no allocation), and produces the byte-for-byte identical value the std wickra-core library produces on a server.

Design

• No heap. Windowed indicators store their history in a const-generic Ring or a fixed array; nothing touches an allocator. The window length is the const parameter N (e.g. Sma<20>).
• No panics in the update path. A panic on a microcontroller is a reset, so the core never uses unwrap/expect/unreachable! on the hot path; warmup and undefined states are expressed as None.
• Deterministic to the bit. The floating-point work is done in the exact same order as wickra-core (rolling-sum add/subtract order, the periodic reseed, the final sum / period division), so the result is identical on thumbv7em-none-eabihf, thumbv6m-none-eabi and an x86-64 host alike. The few transcendental ops (abs, max, fused multiply-add) route through a single [math] switch point — std on a host, libm on bare metal — whose two implementations are IEEE-754 identical.

Example

use wickra_embed_core::{Indicator, Sma};

let mut sma = Sma::<3>::new();
let mut last = None;
for i in 0..10 {
    last = sma.update(100.0 + f64::from(i));
}
assert!(last.is_some());

Re-exports

pub use indicators::Atr;

pub use indicators::Ema;

pub use indicators::Roc;

pub use indicators::Rsi;

pub use indicators::Sma;

pub use ohlcv::Candle;

pub use traits::Indicator;

Modules

indicators

The verified no-alloc indicator subset.

ohlcv

The Candle OHLC bar — the Copy input type for candle indicators.

ring

A fixed-capacity ring buffer of f64, allocation-free.

traits

The Indicator contract — the same streaming state machine wickra-core uses, narrowed to a scalar f64 output and no allocation.

Functions

version

Crate version string (CARGO_PKG_VERSION), for the C ABI and diagnostics.