fusible 0.9.0

Electronic linter: a fuse that blows to block firmware code generation
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//! Central database of microcontroller silicon targets.

pub mod esp32s3;
pub mod rp2040;
pub mod stm32;

use super::model::SiliconTarget;

/// Resolves an exact microcontroller chip ID to its static silicon database
/// definition.
///
/// Matching is case-insensitive and ignores `-`, `_` and spaces, so
/// `ESP32-S3`, `esp32s3` and `esp32_s3` all resolve. STM32G431 also accepts
/// its package/flash suffixes (`stm32g431cb`, `stm32g431kb`, ...). Any other
/// chip, including other members of the same family, returns `None`.
pub fn find_target(query: &str) -> Option<&'static SiliconTarget> {
    let clean: String = query
        .trim()
        .chars()
        .filter(|c| !matches!(c, '-' | '_' | ' '))
        .map(|c| c.to_ascii_lowercase())
        .collect();

    match clean.as_str() {
        "rp2040" => Some(&rp2040::RP2040),
        "esp32s3" => Some(&esp32s3::ESP32S3),
        _ if is_stm32g431(&clean) => Some(&stm32::STM32G431),
        _ => None,
    }
}

fn is_stm32g431(clean: &str) -> bool {
    match clean.strip_prefix("stm32g431") {
        Some("") => true,
        Some(suffix) => {
            let b = suffix.as_bytes();
            b.len() == 2 && b"cgkmrv".contains(&b[0]) && b"68b".contains(&b[1])
        }
        None => false,
    }
}