pintc 0.14.0

Compiler for the Pint language
Documentation 
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use clap::Parser;

#[derive(Debug, Default, Parser)]
pub struct Args {
    #[arg(value_parser)]
    pub filepath: String,

    #[arg(long = "output", short = 'o')]
    pub output: Option<String>,

    #[arg(long, value_parser = parse_hex)]
    pub salt: Option<[u8; 32]>,

    #[arg(long = "print-parsed")]
    pub print_parsed: bool,

    #[arg(long = "print-flat")]
    pub print_flat: bool,

    #[arg(long = "print-optimized")]
    pub print_optimized: bool,

    #[arg(long = "print-asm")]
    pub print_asm: bool,

    #[arg(long = "skip-optimize", hide = true)]
    pub skip_optimize: bool,

    #[arg(long = "no-output", hide = true)]
    pub no_output: bool,
}

/// Parses a `&str` that represents a 256-bit unsigned integer in hexadecimal format and converts
/// it into a `[u8; 32]`. If the string has less than 64 hexadecimal digits, left pad with zeros.
///
/// Emits an error if the conversion is not possible.
fn parse_hex(value: &str) -> Result<[u8; 32], String> {
    if value.len() > 64 || !value.chars().all(|c| c.is_ascii_hexdigit()) {
        return Err("Salt must be a hexadecimal number with up to 64 digts (256 bits)".to_string());
    }

    // Pad the value to 64 characters by prepending zeros if needed
    let padded_value = format!("{:0>64}", value);
    let mut salt = [0u8; 32];
    for i in 0..32 {
        salt[i] = u8::from_str_radix(&padded_value[2 * i..2 * i + 2], 16)
            .map_err(|_| "Invalid hexadecimal value")?;
    }
    Ok(salt)
}