commit 35bccc7e9fe41b02b56637612230fc619be9efbc · sachy.dev/sachy-embed-core

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.tangled/workflows/test.yml

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         - name: Format check

     

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           command: cargo fmt --all --check

     

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         - name: Tests

     

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           command: cargo test --workspace

     

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           command: cargo test --workspace --locked

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Cargo.lock

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       ]

     

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       [[package]]

     

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       name = "sachy-fnv"

     

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       version = "0.1.0"

     

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       [[package]]

     

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       name = "sachy-shtc3"

     

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       version = "0.1.0"

     

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       dependencies = [

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Cargo.toml

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       [workspace]

     

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       resolver = "3"

     

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       members = ["sachy-battery","sachy-bthome", "sachy-fmt", "sachy-shtc3"]

     

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       members = ["sachy-battery","sachy-bthome", "sachy-fmt", "sachy-fnv", "sachy-shtc3"]

     

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       [workspace.package]

     

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       authors = ["Sachymetsu <sachymetsu@tutamail.com>"]

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sachy-fnv/Cargo.toml

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       [package]

     

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       name = "sachy-fnv"

     

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       authors.workspace = true

     

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       edition.workspace = true

     

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       repository.workspace = true

     

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       license.workspace = true

     

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       version.workspace = true

     

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       rust-version.workspace = true

     

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       [dependencies]

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sachy-fnv/src/lib.rs

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       //! This crate provides a `const` FNV32 hasher for the purpose of supporting the ESPHome/Home Assistant protocol where required.

     

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       //!

     

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       //! ```

     

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       //! use sachy_fnv::fnv32_hash;

     

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       //!

     

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       //! let hash = fnv32_hash("water_pump_1");

     

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       //!

     

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       //! assert_eq!(hash, 3557162331);

     

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       //! ```

     

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       #![no_std]

     

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       const FNV_OFFSET_BASIS_32: u32 = 0x811c9dc5;

     

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       const FNV_PRIME_32: u32 = 0x01000193;

     

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       /// `const` FNV32 hasher. Takes a `&str` and returns a `u32` hash.

     

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       pub const fn fnv32_hash(str: &str) -> u32 {

     

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           let bytes = str.as_bytes();

     

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           let mut hash = FNV_OFFSET_BASIS_32;

     

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           let mut i = 0;

     

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           let len = bytes.len();

     

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           while i < len {

     

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               hash = hash.wrapping_mul(FNV_PRIME_32);

     

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               hash ^= bytes[i] as u32;

     

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               i += 1;

     

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           }

     

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           hash

     

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       }

     

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       #[cfg(test)]

     

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       mod tests {

     

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           use super::*;

     

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           #[test]

     

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           fn it_works() {

     

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               let result = fnv32_hash("water_pump_1");

     

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               assert_eq!(result, 3557162331);

     

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               let result = fnv32_hash("pump_1_duration");

     

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               assert_eq!(result, 931766070);

     

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           }

     

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       }