wickra-embed-core

Allocation-free, #![no_std] streaming technical indicators — byte-for-byte identical to wickra-core.

wickra-embed-core is the computational heart of wickra-embed: a small, verified, no-alloc subset of the Wickra indicator catalogue (Sma, Ema, Rsi, Atr, Roc) for bare-metal and HFT hardware. Every update is O(1) with a bounded worst case, keeps its state inline in fixed-capacity buffers (no heap), and produces the exact same bits the std wickra-core produces on a server — verified by a byte-parity test suite.

use wickra_embed_core::{Indicator, Sma};

let mut sma = Sma::<20>::new();      // window length is the const generic
let mut latest = None;
for price in prices {
    latest = sma.update(price);       // None during warmup, then Some(value)
}

• No heap. Const-generic ring buffers; nothing touches an allocator.
• No panics on the hot path. Warmup and undefined states are None.
• Deterministic. Same bits on thumbv7em, thumbv6m, and an x86-64 host.

The bare-metal build uses --no-default-features; the default std feature is for host tests and benches only. wickra-core is a dev-dependency parity oracle, never linked into the no_std build.

Dual-licensed under MIT OR Apache-2.0.